@charset "UTF-8";
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(5, 17, 30, 0.94);
  backdrop-filter: blur(20px);
}

.site-header-inner {
  position: relative;
  display: flex;
  min-height: 76px;
  max-width: 1500px;
  align-items: center;
  gap: 22px;
  margin: 0 auto;
  padding-inline: clamp(18px, 3vw, 44px);
}

.brand {
  flex: 0 0 auto;
  margin: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 3px;
}

.nav-item {
  gap: 7px;
  padding: 9px 10px;
  border-radius: 9px;
  font-size: 0.76rem;
  white-space: nowrap;
}

.nav-icon {
  width: 14px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.search-box {
  width: min(270px, 22vw);
}

.app-shell {
  min-height: calc(100vh - 76px);
  margin-left: 0;
}

.context-bar {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 19px clamp(20px, 4vw, 58px);
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(6, 17, 30, 0.5);
  backdrop-filter: blur(18px);
}

.context-bar h1 {
  margin: 0;
  font-size: clamp(1.22rem, 2vw, 1.65rem);
  letter-spacing: -0.025em;
}

.context-progress {
  width: min(190px, 24vw);
}

.context-progress-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
  color: #92a9bd;
  font-size: 0.66rem;
}

.context-progress strong {
  color: #4ce0df;
}

.page-content {
  max-width: 1500px;
  margin: 0 auto;
}

.sidebar-overlay {
  display: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.icon-button,
.menu-toggle {
  position: relative;
  display: none;
}

.icon-button::before {
  width: 15px;
  height: 15px;
  border: 2px solid currentColor;
  border-radius: 50%;
  content: "";
}

.icon-button::after {
  position: absolute;
  width: 9px;
  height: 2px;
  background: currentColor;
  content: "";
  transform: translate(9px, 9px) rotate(45deg);
  transform-origin: center;
}

.menu-toggle::before {
  width: 18px;
  height: 12px;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
}

.menu-toggle::after {
  position: absolute;
  width: 18px;
  height: 2px;
  background: currentColor;
  content: "";
}

.language-switcher {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 5px;
  margin-inline-end: clamp(6px, 1.4vw, 18px);
  padding: 7px 9px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 9px;
  color: #92a9bd;
  background: rgba(255, 255, 255, 0.025);
}

.language-option {
  border: 0;
  padding: 0 2px;
  color: #92a9bd;
  background: transparent;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.language-option:hover,
.language-option.active {
  color: #4ce0df;
}

.language-prompt-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(2, 9, 17, 0.8);
  backdrop-filter: blur(14px);
}

.language-prompt-card {
  width: min(540px, 100%);
  padding: clamp(24px, 5vw, 38px);
  border: 1px solid rgba(76, 224, 223, 0.28);
  border-radius: 16px;
  background: rgba(10, 24, 40, 0.96);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

.language-prompt-card h2 {
  margin: 10px 0 8px;
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  letter-spacing: -0.055em;
}

.language-prompt-card p {
  margin: 0;
  color: #92a9bd;
  font-size: 0.85rem;
  line-height: 1.7;
}

.language-prompt-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 22px;
}

.language-prompt-option {
  min-height: 88px;
  flex-direction: column;
  align-items: flex-start;
  padding: 15px;
  text-align: left;
}

.language-prompt-option strong,
.language-prompt-option small {
  display: block;
}

.language-prompt-option small {
  margin-top: 4px;
  opacity: 0.76;
  font-size: 0.67rem;
  font-weight: 500;
  line-height: 1.45;
}

.ftue-guide-modal {
  width: min(1120px, 100vw - 28px);
  max-height: calc(100vh - 28px);
  overflow: auto;
}

.ftue-guide-header {
  display: grid;
  gap: 10px;
  padding: clamp(22px, 4vw, 34px);
}

.ftue-guide-header h2 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.02;
}

.ftue-guide-header p {
  max-width: 820px;
  margin: 0;
  color: #92a9bd;
  font-size: 0.92rem;
  line-height: 1.65;
}

.ftue-panel-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 0 clamp(18px, 3vw, 30px) clamp(18px, 3vw, 30px);
}

.ftue-panel {
  display: grid;
  align-content: start;
  gap: 10px;
  min-height: 250px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 10px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.026);
}

.ftue-panel button {
  align-self: end;
  margin-top: auto;
}

.ftue-panel > span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 9px;
  color: #4ce0df;
  font-weight: 900;
}

.ftue-panel h3 {
  margin: 0;
  font-size: 1.08rem;
}

.ftue-panel p,
.ftue-panel li,
.ftue-route-map span {
  color: #92a9bd;
  font-size: 0.78rem;
  line-height: 1.55;
}

.ftue-panel p {
  margin: 0;
}

.ftue-panel ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 18px;
}

.ftue-route-map {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 clamp(18px, 3vw, 30px) clamp(18px, 3vw, 30px);
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 10px;
  padding: 14px 16px;
  background: rgba(76, 224, 223, 0.06);
}

.ftue-route-map strong {
  color: #eff8ff;
}

@media (max-width: 980px) {
  .ftue-panel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 620px) {
  .ftue-panel-grid {
    grid-template-columns: 1fr;
  }
  .ftue-route-map {
    align-items: flex-start;
    flex-direction: column;
  }
}
.nav-item[data-route=script-learning],
.nav-item[data-route=advanced] {
  display: none;
}

.course-overview {
  display: grid;
  gap: 30px;
}

.course-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.38fr);
  gap: clamp(24px, 5vw, 72px);
  padding: clamp(26px, 5vw, 58px);
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 18px;
  background: linear-gradient(112deg, rgba(15, 42, 65, 0.96), rgba(9, 26, 44, 0.94)), rgba(10, 24, 40, 0.96);
}

.course-intro h2 {
  max-width: 900px;
  margin: 15px 0 13px;
  font-size: clamp(2rem, 4.8vw, 4.55rem);
  line-height: 0.98;
  letter-spacing: -0.075em;
}

.course-intro p,
.course-description p,
.course-facts p,
.reader-section p,
.reader-practice-cta p,
.reader-sidebar-heading p {
  margin: 0;
  color: #92a9bd;
  font-size: 0.84rem;
  line-height: 1.72;
}

.course-intro-copy > p {
  max-width: 740px;
  color: #b6cbd9;
  font-size: 0.96rem;
}

.course-intro-stats {
  display: grid;
  align-content: center;
  gap: 1px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.course-intro-stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
}

.course-intro-stats strong {
  color: #4ce0df;
  font-size: 1.75rem;
  letter-spacing: -0.06em;
}

.course-intro-stats span,
.course-fact-row span {
  color: #92a9bd;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.36fr);
  gap: 18px;
}

.course-description,
.course-facts {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: rgba(13, 31, 50, 0.9);
}

.course-description h3,
.course-facts h3,
.reader-section h3,
.reader-practice-cta h3,
.reader-sidebar-heading h3 {
  margin: 10px 0 8px;
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  letter-spacing: -0.04em;
}

.course-outcome-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.course-outcome-list li {
  position: relative;
  padding: 11px 0 11px 27px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  color: #c4d7e4;
  font-size: 0.8rem;
  line-height: 1.55;
}

.course-outcome-list li::before {
  position: absolute;
  top: 11px;
  left: 1px;
  color: #4ce0df;
  content: "✓";
}

.course-facts {
  display: flex;
  flex-direction: column;
}

.course-fact-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.course-fact-row strong {
  color: #eff8ff;
  font-size: 0.74rem;
}

.course-outline-section {
  padding-top: 10px;
}

.course-filter-panel {
  margin-bottom: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.018);
}

.course-accordion {
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: rgba(7, 20, 34, 0.72);
}

.curriculum-level-panel {
  padding-top: 0;
}

.level-accordion {
  background: linear-gradient(180deg, rgba(76, 224, 223, 0.035), transparent 140px), rgba(7, 20, 34, 0.72);
}

.level-course-accordion > summary {
  min-height: 78px;
}

.level-course-body {
  display: grid;
  gap: 16px;
  padding: 16px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(255, 255, 255, 0.014);
}

.level-course-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 14px;
  border: 1px solid rgba(152, 190, 220, 0.12);
  border-radius: 12px;
  background: rgba(9, 24, 41, 0.72);
}

.level-course-toolbar .button-row {
  margin-top: 0;
}

.compact-list {
  border-radius: 12px;
}

.level-choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.level-choice-card {
  display: grid;
  gap: 14px;
  min-height: 245px;
  padding: 22px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(18, 47, 72, 0.74), rgba(8, 22, 37, 0.88)), rgba(13, 31, 50, 0.9);
}

.level-choice-card h3 {
  margin: 0;
  color: #eff8ff;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  letter-spacing: -0.04em;
}

.level-choice-card p {
  margin: 0;
  color: #92a9bd;
  font-size: 0.82rem;
  line-height: 1.65;
}

.level-choice-card footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.level-choice-card footer span {
  color: #92a9bd;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.level-choice-card footer button {
  border: 1px solid rgba(76, 224, 223, 0.3);
  border-radius: 10px;
  padding: 9px 12px;
  color: #06111c;
  background: #4ce0df;
  font-size: 0.72rem;
  font-weight: 900;
}

.chapter-accordion + .chapter-accordion {
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.chapter-accordion summary {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto 12px;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  transition: 160ms ease;
}

.chapter-accordion summary::-webkit-details-marker {
  display: none;
}

.chapter-accordion summary:hover {
  background: rgba(76, 224, 223, 0.045);
}

.chapter-code,
.lesson-state {
  display: grid;
  place-items: center;
  border: 1px solid rgba(76, 224, 223, 0.28);
  border-radius: 9px;
  color: #4ce0df;
  background: rgba(76, 224, 223, 0.07);
  font-size: 0.7rem;
  font-weight: 800;
}

.chapter-code {
  width: 36px;
  height: 36px;
}

.chapter-copy {
  display: grid;
  gap: 3px;
}

.chapter-copy strong {
  color: #eff8ff;
  font-size: 0.9rem;
}

.chapter-copy small,
.lesson-copy small,
.reader-progress-note small {
  color: #92a9bd;
  font-size: 0.7rem;
  line-height: 1.5;
}

.chapter-meta {
  display: grid;
  gap: 1px;
  color: #eff8ff;
  font-size: 0.78rem;
  font-weight: 800;
  text-align: right;
}

.chapter-meta small {
  color: #92a9bd;
  font-size: 0.57rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.chapter-chevron {
  width: 8px;
  height: 8px;
  border-right: 1px solid #4ce0df;
  border-bottom: 1px solid #4ce0df;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 160ms ease;
}

.chapter-accordion[open] > summary .chapter-chevron {
  transform: rotate(225deg) translate(-2px, -2px);
}

.chapter-lessons {
  display: grid;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(255, 255, 255, 0.016);
}

.outline-lesson {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 12px 18px 12px 23px;
  border: 0;
  border-bottom: 1px solid rgba(152, 190, 220, 0.1);
  color: #eff8ff;
  background: transparent;
  text-align: left;
  transition: 150ms ease;
}

.outline-lesson:last-child {
  border-bottom: 0;
}

.outline-lesson:hover,
.outline-lesson.active {
  background: rgba(76, 224, 223, 0.06);
}

.lesson-state {
  width: 28px;
  height: 28px;
  border-color: rgba(152, 190, 220, 0.16);
  color: #92a9bd;
  background: transparent;
  font-size: 0.62rem;
}

.lesson-state.complete {
  border-color: rgba(111, 229, 168, 0.34);
  color: #6fe5a8;
  background: rgba(111, 229, 168, 0.08);
}

.lesson-copy {
  display: grid;
  gap: 3px;
}

.lesson-copy strong {
  font-size: 0.79rem;
}

.lesson-open {
  color: #4ce0df;
  font-size: 0.68rem;
  font-weight: 800;
}

.reader-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.32fr);
  align-items: start;
  gap: 20px;
}

.lesson-reader {
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 16px;
  background: rgba(9, 24, 41, 0.88);
}

.reader-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding: 15px clamp(20px, 4vw, 42px);
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  color: #92a9bd;
  font-size: 0.68rem;
}

.reader-breadcrumb button {
  border: 0;
  padding: 0;
  color: #4ce0df;
  background: transparent;
  font: inherit;
}

.reader-hero,
.reader-section,
.reader-practice-cta {
  padding: clamp(22px, 4vw, 42px);
}

.reader-hero {
  background: linear-gradient(126deg, rgba(18, 47, 72, 0.86), rgba(10, 27, 45, 0.7));
}

.reader-hero h2 {
  max-width: 920px;
  margin: 15px 0 11px;
  font-size: clamp(2rem, 5vw, 4.45rem);
  line-height: 0.99;
  letter-spacing: -0.075em;
}

.reader-hero p {
  max-width: 820px;
  margin: 0;
  color: #b9cddb;
  font-size: 0.94rem;
  line-height: 1.78;
}

.reader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 20px;
}

.reader-meta span {
  padding: 6px 8px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 99px;
  color: #b4ccdb;
  background: rgba(255, 255, 255, 0.025);
  font-size: 0.65rem;
}

.reader-section {
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.reader-section > p {
  max-width: 820px;
}

.part-visual-section {
  display: grid;
  gap: 20px;
  background: rgba(76, 224, 223, 0.018);
}

.visual-section-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
}

.visual-section-header h3 {
  margin: 10px 0 8px;
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  letter-spacing: -0.04em;
}

.visual-section-header p {
  max-width: 620px;
  margin: 0;
  color: #92a9bd;
  font-size: 0.82rem;
  line-height: 1.65;
}

.visual-slide-status {
  flex: 0 0 auto;
  padding: 7px 10px;
  border: 1px solid rgba(76, 224, 223, 0.22);
  border-radius: 999px;
  color: #4ce0df;
  background: rgba(76, 224, 223, 0.07);
  font-size: 0.68rem;
  font-weight: 800;
}

.visual-slider-mount {
  min-height: 260px;
}

.visual-slider-empty {
  display: grid;
  min-height: 260px;
  place-items: center;
  border: 1px dashed rgba(152, 190, 220, 0.24);
  border-radius: 12px;
  color: #92a9bd;
  background: rgba(255, 255, 255, 0.016);
  font-size: 0.82rem;
}

.visual-slider {
  display: grid;
  gap: 14px;
  outline: 0;
}

.visual-slider:focus-visible {
  border-radius: 12px;
  box-shadow: 0 0 0 3px rgba(76, 224, 223, 0.18);
}

.visual-slider-stage {
  position: relative;
  display: grid;
  min-height: 320px;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(5, 16, 29, 0.88), rgba(10, 27, 45, 0.82)), #07111f;
  touch-action: pan-y;
}

.visual-slide-frame {
  display: grid;
  width: 100%;
  place-items: center;
  padding: clamp(10px, 2vw, 18px);
}

.visual-slide-frame img {
  display: block;
  width: auto;
  max-width: 100%;
  max-height: min(72vh, 780px);
  border-radius: 8px;
  object-fit: contain;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.28);
}

.visual-slider-button {
  position: absolute;
  z-index: 2;
  top: 50%;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(239, 248, 255, 0.18);
  border-radius: 50%;
  color: #eff8ff;
  background: rgba(5, 14, 25, 0.78);
  font-size: 1.75rem;
  line-height: 1;
  transform: translateY(-50%);
  transition: 160ms ease;
}

.visual-slider-button:hover {
  border-color: rgba(76, 224, 223, 0.44);
  color: #06111c;
  background: #4ce0df;
}

.visual-slider-button:disabled {
  cursor: default;
  opacity: 0.38;
}

.visual-slider-button.previous {
  left: 14px;
}

.visual-slider-button.next {
  right: 14px;
}

.visual-slider-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.visual-slide-counter {
  color: #92a9bd;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.visual-slider-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.visual-slider-dot {
  width: 10px;
  height: 10px;
  border: 1px solid rgba(152, 190, 220, 0.36);
  border-radius: 50%;
  background: transparent;
  transition: 150ms ease;
}

.visual-slider-dot:hover,
.visual-slider-dot.active {
  border-color: #4ce0df;
  background: #4ce0df;
}

.reader-learning-list {
  display: grid;
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.reader-learning-list li {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 11px;
  padding: 13px 0;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  color: #c7d9e5;
  font-size: 0.82rem;
  line-height: 1.5;
}

.reader-learning-list li span {
  width: 9px;
  height: 9px;
  margin-top: 5px;
  border: 1px solid rgba(76, 224, 223, 0.62);
  border-radius: 50%;
  background: rgba(76, 224, 223, 0.11);
}

.reader-safe-note {
  display: grid;
  gap: 7px;
  margin-top: 19px;
  padding: 16px 18px;
  border-left: 3px solid #6fe5a8;
  background: rgba(111, 229, 168, 0.07);
}

.reader-safe-note span {
  color: #6fe5a8;
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.reader-safe-note strong {
  color: #d6f5e4;
  font-size: 0.82rem;
  line-height: 1.6;
}

.reader-warning-list {
  display: grid;
  gap: 9px;
  margin: 17px 0 0;
  padding: 0;
  list-style: none;
}

.reader-warning-list li {
  position: relative;
  padding: 12px 14px 12px 36px;
  border: 1px solid rgba(255, 123, 114, 0.17);
  border-radius: 9px;
  color: #d2c1c2;
  background: rgba(255, 123, 114, 0.045);
  font-size: 0.8rem;
  line-height: 1.55;
}

.reader-warning-list li::before {
  position: absolute;
  top: 12px;
  left: 15px;
  color: #ff7b72;
  content: "!";
  font-weight: 800;
}

.reader-practice-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(76, 224, 223, 0.035);
}

.reader-practice-cta .button-row {
  flex: 0 0 auto;
  margin-top: 0;
}

.reader-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.reader-nav-card {
  display: grid;
  gap: 6px;
  min-height: 92px;
  padding: 18px 20px;
  border: 0;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.018);
  text-align: left;
  transition: 150ms ease;
}

.reader-nav-card + .reader-nav-card {
  border-left: 1px solid rgba(152, 190, 220, 0.16);
}

.reader-nav-card:hover {
  background: rgba(76, 224, 223, 0.065);
}

.reader-nav-card.disabled {
  color: #92a9bd;
  opacity: 0.6;
}

.reader-nav-card small {
  color: #4ce0df;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.reader-nav-card strong {
  font-size: 0.78rem;
  line-height: 1.45;
}

.reader-sidebar-sticky {
  position: sticky;
  top: 94px;
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: rgba(13, 31, 50, 0.9);
}

.reader-sidebar-heading,
.reader-progress-note {
  padding: 18px;
}

.reader-sidebar-heading {
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
}

.reader-sidebar-heading h3 {
  font-size: 1.12rem;
}

.chapter-reader-links {
  display: grid;
}

.chapter-reader-link {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: start;
  gap: 8px;
  padding: 10px 13px;
  border: 0;
  border-bottom: 1px solid rgba(152, 190, 220, 0.1);
  color: #bdcfdb;
  background: transparent;
  text-align: left;
  transition: 150ms ease;
}

.chapter-reader-link:hover,
.chapter-reader-link.active {
  color: #eff8ff;
  background: rgba(76, 224, 223, 0.07);
}

.chapter-reader-link span {
  color: #4ce0df;
  font-size: 0.65rem;
  font-weight: 800;
}

.chapter-reader-link strong {
  font-size: 0.72rem;
  line-height: 1.42;
}

.reader-progress-note {
  display: grid;
  gap: 5px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.reader-progress-note span {
  color: #92a9bd;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.reader-progress-note strong {
  color: #eff8ff;
  font-size: 0.8rem;
}

.reader-back-button {
  width: calc(100% - 26px);
  margin: 0 13px 13px;
}

@media (max-width: 1080px) {
  .course-intro,
  .course-overview-grid,
  .reader-layout,
  .level-choice-grid {
    grid-template-columns: 1fr;
  }
  .course-intro-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  }
  .course-intro-stats div {
    display: grid;
    gap: 4px;
    border-right: 1px solid rgba(152, 190, 220, 0.16);
    border-bottom: 0;
  }
  .course-intro-stats div:last-child {
    border-right: 0;
  }
  .reader-sidebar {
    order: -1;
  }
  .reader-sidebar-sticky {
    position: static;
  }
  .chapter-reader-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 680px) {
  .course-intro {
    padding: 23px;
  }
  .course-intro h2,
  .reader-hero h2 {
    font-size: 2.45rem;
  }
  .course-intro-stats {
    grid-template-columns: 1fr;
  }
  .course-intro-stats div {
    display: flex;
    border-right: 0;
    border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  }
  .chapter-accordion summary {
    grid-template-columns: 34px minmax(0, 1fr) 10px;
    gap: 10px;
    padding: 14px;
  }
  .chapter-meta,
  .chapter-copy small,
  .lesson-open {
    display: none;
  }
  .outline-lesson {
    grid-template-columns: 28px minmax(0, 1fr);
    padding: 11px 14px;
  }
  .reader-practice-cta {
    align-items: stretch;
    flex-direction: column;
  }
  .visual-section-header,
  .visual-slider-footer {
    align-items: stretch;
    flex-direction: column;
  }
  .visual-slide-status {
    width: max-content;
  }
  .visual-slider-stage {
    min-height: 250px;
  }
  .visual-slider-button {
    width: 36px;
    height: 36px;
    font-size: 1.45rem;
  }
  .visual-slider-button.previous {
    left: 8px;
  }
  .visual-slider-button.next {
    right: 8px;
  }
  .visual-slider-dots {
    justify-content: flex-start;
  }
  .reader-practice-cta .button-row {
    display: grid;
  }
  .reader-pagination,
  .chapter-reader-links {
    grid-template-columns: 1fr;
  }
  .reader-nav-card + .reader-nav-card {
    border-top: 1px solid rgba(152, 190, 220, 0.16);
    border-left: 0;
  }
}
/* ─── Practice Flow (Checkpoint 3 & 4) ─── */
.pf-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  gap: 20px;
}

.pf-mobile-panel-slot {
  display: none;
}

.pf-desktop-panel-slot {
  display: block;
}

.pf-main {
  min-width: 0;
}

.pf-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(9, 24, 41, 0.88);
  padding: clamp(20px, 4vw, 34px);
}

.pf-card h2 {
  margin: 14px 0 8px;
  font-size: clamp(1.3rem, 2.8vw, 1.9rem);
  letter-spacing: -0.04em;
}

.pf-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.pf-instruction {
  max-width: 780px;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.7;
}

.pf-footer-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.pf-footer-nav button:disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* ─── Navigation panel ─── */
.pf-nav-panel {
  width: 100%;
}

.pf-nav-sticky {
  position: sticky;
  top: 94px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(13, 31, 50, 0.9);
  padding: 18px;
}

.pf-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.pf-nav-header strong {
  color: var(--text);
  font-size: 0.88rem;
  letter-spacing: -0.03em;
}

.pf-nav-header small {
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pf-nav-track {
  height: 5px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.08);
  margin-bottom: 16px;
}

.pf-nav-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  transition: width 300ms ease;
}

.pf-num-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}

.pf-num-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.025);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: 160ms ease;
}

.pf-num-btn:hover:not(:disabled) {
  border-color: rgba(76, 224, 223, 0.4);
  background: rgba(76, 224, 223, 0.07);
}

.pf-num-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.pf-num-btn.current {
  border-color: rgba(76, 224, 223, 0.7);
  color: var(--cyan);
  background: rgba(76, 224, 223, 0.12);
  box-shadow: 0 0 12px rgba(76, 224, 223, 0.15);
}

.pf-num-btn.solved {
  border-color: rgba(111, 229, 168, 0.4);
  color: var(--green);
  background: rgba(111, 229, 168, 0.1);
}

.pf-num-btn.solved.current {
  border-color: rgba(111, 229, 168, 0.7);
  box-shadow: 0 0 12px rgba(111, 229, 168, 0.15);
}

.pf-num-btn.attempted {
  border-color: rgba(255, 182, 91, 0.4);
  color: var(--orange);
  background: rgba(255, 182, 91, 0.08);
}

.pf-num-btn.attempted.current {
  border-color: rgba(255, 182, 91, 0.7);
  box-shadow: 0 0 12px rgba(255, 182, 91, 0.12);
}

.pf-num-btn.active {
  border-color: rgba(76, 224, 223, 0.35);
  color: #b8d0de;
  background: rgba(76, 224, 223, 0.05);
}

.pf-num-btn.locked {
  color: #4c6478;
  background: rgba(255, 255, 255, 0.015);
}

/* Legend */
.pf-nav-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.pf-legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pf-dot {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 3px;
}

.pf-dot.active {
  background: var(--cyan);
}

.pf-dot.solved {
  background: var(--green);
}

.pf-dot.attempted {
  background: var(--orange);
}

.pf-dot.locked {
  background: #3a4f62;
}

/* ─── Practice flow responsive ─── */
@media (max-width: 1080px) {
  .pf-layout {
    grid-template-columns: 1fr;
  }
  .pf-desktop-panel-slot {
    display: none;
  }
  .pf-mobile-panel-slot {
    display: block;
  }
  .pf-nav-sticky {
    position: static;
  }
  .pf-num-grid {
    grid-template-columns: repeat(10, 1fr);
  }
}
@media (max-width: 680px) {
  .pf-num-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .pf-num-btn {
    height: 38px;
    font-size: 0.62rem;
  }
  .pf-card {
    padding: 18px;
  }
  .pf-card h2 {
    font-size: 1.3rem;
  }
  .pf-footer-nav {
    flex-direction: column;
    gap: 8px;
  }
  .pf-footer-nav button {
    width: 100%;
  }
  .pf-nav-legend {
    gap: 7px;
  }
}
@media (max-width: 430px) {
  .pf-num-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
  }
  .pf-num-btn {
    height: 36px;
    font-size: 0.58rem;
  }
}
/* ─── Checkpoint 4 Badges, Inputs, and Comparison Styles ─── */
.pf-type-badge {
  font-size: 0.46rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  opacity: 0.55;
  text-transform: uppercase;
  margin-top: -1px;
}

.pf-num-btn.current .pf-type-badge {
  opacity: 0.85;
}

.pf-num-btn.solved .pf-type-badge {
  color: var(--green);
  opacity: 0.85;
}

.pf-num-btn.attempted .pf-type-badge {
  color: var(--orange);
  opacity: 0.85;
}

.pf-num-btn.locked .pf-type-badge {
  opacity: 0.3;
}

/* Monospace text input for fill_code / fill_text */
.pf-input-container {
  margin: 16px 0;
}

.pf-answer-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.pf-practice-answer {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text);
  background: rgba(13, 31, 50, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.pf-practice-answer:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 8px rgba(76, 224, 223, 0.15);
}

.pf-practice-answer:disabled {
  opacity: 0.6;
  background: rgba(13, 31, 50, 0.8);
  border-color: rgba(132, 175, 205, 0.1);
  color: var(--muted);
  cursor: not-allowed;
}

.pf-practice-answer.monospace {
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  letter-spacing: -0.01em;
}

/* Code Example Pairs (Safe vs Unsafe stacked layout) */
.code-example-pair {
  margin-top: 24px;
  border-top: 1px dashed rgba(132, 175, 205, 0.15);
  padding-top: 20px;
}

.code-example-pair:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.code-example-pair h3 {
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}

.code-example-flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.code-panel-container {
  display: flex;
  flex-direction: column;
  position: relative;
}

.code-example-label {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 8px;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.code-example-label.correct {
  color: var(--green);
  background: rgba(111, 229, 168, 0.12);
  border: 1px solid rgba(111, 229, 168, 0.2);
}

.code-example-label.incorrect {
  color: var(--red);
  background: rgba(255, 123, 114, 0.12);
  border: 1px solid rgba(255, 123, 114, 0.2);
}

.code-panel.correct {
  border: 1px solid rgba(111, 229, 168, 0.22);
}

.code-panel.incorrect {
  border: 1px solid rgba(255, 123, 114, 0.22);
  background: #090b11;
}

.code-example-explanation {
  font-size: 0.74rem;
  line-height: 1.5;
  margin-top: 6px;
  color: #bdcfdb;
}

.code-example-explanation.correct-explanation {
  border-left: 2px solid rgba(111, 229, 168, 0.4);
  padding-left: 8px;
}

.code-example-explanation.incorrect-explanation {
  border-left: 2px solid rgba(255, 123, 114, 0.4);
  padding-left: 8px;
  color: #e2c0c0;
}

/* Practice Done Button in Reader */
.practice-done-btn {
  border-color: rgba(111, 229, 168, 0.4) !important;
  color: var(--green) !important;
  background: rgba(111, 229, 168, 0.08) !important;
}

.practice-done-btn:hover {
  background: rgba(111, 229, 168, 0.14) !important;
}

/* ─── Tiered Hint Styles ─── */
.hint-label {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.56rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: 4px;
}

.hint-reveal-suggestion {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--muted);
  font-style: italic;
}

.practice-feedback.hint-level-1 {
  border-left: 3px solid rgba(132, 175, 205, 0.28);
  background: rgba(132, 175, 205, 0.03);
}
.practice-feedback.hint-level-1 .hint-label {
  color: #bdcfdb;
  background: rgba(132, 175, 205, 0.12);
}

.practice-feedback.hint-level-2 {
  border-left: 3px solid rgba(255, 182, 91, 0.55);
  background: rgba(255, 182, 91, 0.05);
}
.practice-feedback.hint-level-2 .hint-label {
  color: var(--orange);
  background: rgba(255, 182, 91, 0.15);
}

.practice-feedback.hint-level-3 {
  border-left: 3px solid rgba(111, 229, 168, 0.65);
  background: rgba(111, 229, 168, 0.05);
}
.practice-feedback.hint-level-3 .hint-label {
  color: var(--green);
  background: rgba(111, 229, 168, 0.15);
}

/* ─── Practice Textarea (build_code) ─── */
.pf-textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px 14px;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  letter-spacing: -0.01em;
  line-height: 1.6;
  color: var(--text);
  background: rgba(13, 31, 50, 0.5);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
  resize: vertical;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.pf-textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 8px rgba(76, 224, 223, 0.15);
}

.pf-textarea:disabled {
  opacity: 0.6;
  background: rgba(13, 31, 50, 0.8);
  border-color: rgba(132, 175, 205, 0.1);
  color: var(--muted);
  cursor: not-allowed;
}

/* ─── Fix Code Bug Panel ─── */
.fix-code-bug-panel {
  border: 1px solid rgba(255, 123, 114, 0.22) !important;
  background: #090b11 !important;
}

.fix-code-bug-badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.52rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red);
  background: rgba(255, 123, 114, 0.15);
  border: 1px solid rgba(255, 123, 114, 0.25);
  border-radius: 4px;
  margin-right: 6px;
}

.fix-code-bug-desc {
  margin: 6px 0 12px;
  padding: 8px 12px;
  font-size: 0.78rem;
  line-height: 1.55;
  color: #e2c0c0;
  background: rgba(255, 123, 114, 0.04);
  border-left: 3px solid rgba(255, 123, 114, 0.35);
  border-radius: 0 6px 6px 0;
}

/* ─── Build Code Spec ─── */
.build-code-spec {
  margin: 8px 0 0;
  padding: 10px 14px;
  font-size: 0.8rem;
  line-height: 1.6;
  color: #bdcfdb;
  background: rgba(76, 224, 223, 0.04);
  border-left: 3px solid rgba(76, 224, 223, 0.3);
  border-radius: 0 6px 6px 0;
}

.build-code-starter {
  border: 1px solid rgba(76, 224, 223, 0.15);
}

.roadmap-dashboard,
.roadmap-overview,
.glossary-page,
.level-projects-section {
  display: grid;
  gap: 24px;
}

.roadmap-hero,
.roadmap-panel,
.session-card,
.practice-summary-card,
.glossary-card,
.lesson-block,
.level-project-card {
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  background: rgba(10, 24, 40, 0.88);
}

.roadmap-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(24px, 4vw, 46px);
  background: linear-gradient(120deg, rgba(76, 224, 223, 0.12), transparent 42%), linear-gradient(135deg, rgba(14, 40, 61, 0.96), rgba(9, 22, 37, 0.96));
}

.roadmap-hero h2 {
  max-width: 900px;
  margin: 12px 0 10px;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1;
  letter-spacing: 0;
}

.roadmap-hero p,
.roadmap-panel p,
.session-card p,
.practice-summary-card p,
.glossary-card p,
.lesson-block p,
.level-project-card p {
  margin: 0;
  color: #92a9bd;
  font-size: 0.84rem;
  line-height: 1.7;
}

.dashboard-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.dashboard-focus-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.roadmap-next-hero {
  align-items: center;
}

.roadmap-mini-steps {
  display: grid;
  gap: 8px;
}

.roadmap-mini-steps button {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(152, 190, 220, 0.14);
  border-radius: 8px;
  padding: 10px;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.02);
  text-align: left;
}

.roadmap-mini-steps button.active {
  border-color: rgba(76, 224, 223, 0.42);
  background: rgba(76, 224, 223, 0.08);
}

.roadmap-mini-steps span,
.roadmap-mini-steps small {
  color: #92a9bd;
  font-size: 0.68rem;
  font-weight: 800;
}

.roadmap-mini-steps strong {
  overflow: hidden;
  color: #eff8ff;
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.roadmap-panel {
  display: grid;
  align-content: start;
  gap: 13px;
  min-height: 236px;
  padding: 20px;
}

.current-path-card,
.final-goal-card {
  grid-column: span 2;
}

.roadmap-panel h3,
.session-card h3,
.practice-summary-card h3,
.glossary-card h3,
.lesson-block h3,
.level-project-card h3 {
  margin: 0;
  color: #eff8ff;
  font-size: 1.12rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.roadmap-status-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.roadmap-status-steps span,
.status-pill {
  border-radius: 999px;
}

.roadmap-status-steps span {
  border: 1px solid rgba(152, 190, 220, 0.16);
  padding: 6px 9px;
  color: #92a9bd;
  background: rgba(255, 255, 255, 0.025);
  font-size: 0.68rem;
  font-weight: 800;
}

.roadmap-status-steps span.done {
  border-color: rgba(111, 229, 168, 0.38);
  color: #6fe5a8;
  background: rgba(111, 229, 168, 0.08);
}

.capability-mini-list,
.capability-progress-list {
  display: grid;
  gap: 10px;
}

.capability-mini-row,
.capability-progress-row {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
}

.capability-mini-row strong,
.capability-progress-row strong {
  display: block;
  color: #eff8ff;
  font-size: 0.78rem;
  line-height: 1.4;
}

.capability-mini-row small,
.capability-progress-row small {
  display: block;
  margin-top: 3px;
  color: #92a9bd;
  font-size: 0.66rem;
  line-height: 1.45;
}

.status-dot {
  width: 9px;
  height: 9px;
  margin-top: 5px;
  border: 1px solid rgba(255, 182, 91, 0.5);
  border-radius: 50%;
  background: rgba(255, 182, 91, 0.12);
}

.status-dot.done {
  border-color: rgba(111, 229, 168, 0.58);
  background: rgba(111, 229, 168, 0.5);
}

.checklist-meter {
  overflow: hidden;
  height: 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.checklist-meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #4ce0df, #6fe5a8);
}

.roadmap-level-strip,
.session-card-grid,
.practice-card-grid,
.glossary-grid,
.level-project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.roadmap-level-card,
.session-card,
.practice-summary-card {
  display: grid;
  gap: 14px;
  min-height: 230px;
  padding: 19px;
}

.roadmap-level-card {
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  background: rgba(13, 31, 50, 0.74);
}

.roadmap-level-card h3 {
  margin: 0;
  color: #eff8ff;
  font-size: 1rem;
}

.roadmap-level-card p {
  min-height: 68px;
  margin: 0;
  color: #92a9bd;
  font-size: 0.76rem;
  line-height: 1.55;
}

.roadmap-level-card button,
.session-card footer button,
.practice-summary-card footer button,
.related-lessons button {
  border: 1px solid rgba(76, 224, 223, 0.32);
  border-radius: 8px;
  padding: 8px 11px;
  color: #06111c;
  background: #4ce0df;
  font-size: 0.7rem;
  font-weight: 900;
}

.learn-layout {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  align-items: start;
  gap: 20px;
}

.learn-main,
.session-reader {
  min-width: 0;
}

.learn-curriculum-toggle,
.learn-sidebar-drawer-overlay,
.learn-sidebar-close {
  display: none;
}

.learn-sidebar-sticky {
  position: sticky;
  top: 94px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  background: rgba(9, 24, 41, 0.92);
}

.learn-search {
  display: grid;
  gap: 7px;
  padding: 14px;
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
}

.learn-search label,
.inline-search span,
.lesson-field-grid span,
.lesson-rule-grid span,
.practice-preview span,
.practice-detail-grid span {
  color: #4ce0df;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learn-search input,
.inline-search input {
  width: 100%;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  padding: 10px 12px;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.04);
}

.learn-subchapter-links {
  display: none;
  gap: 4px;
  padding: 12px 18px 16px 64px;
  border-bottom: 1px solid rgba(152, 190, 220, 0.1);
  background: rgba(255, 255, 255, 0.014);
}

.learn-subchapter-links.visible {
  display: grid;
}

.learn-subchapter-links a {
  color: #92a9bd;
  font-size: 0.68rem;
  line-height: 1.35;
  text-decoration: none;
}

.learn-tree .outline-lesson.active,
.learn-tree .outline-lesson:hover {
  transform: none !important;
}

.learn-subchapter-links a:hover {
  color: #4ce0df;
}

.session-reader {
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  background: rgba(9, 24, 41, 0.88);
}

.session-hero h2 {
  letter-spacing: 0;
}

.session-outcome-grid,
.lesson-field-grid,
.lesson-rule-grid,
.practice-detail-grid,
.project-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.session-focus-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 16px;
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(76, 224, 223, 0.025);
}

.session-focus-panel > div,
.lesson-flow > section,
.lesson-bridge-card > div,
.practice-reference-panel,
.practice-proof-panel {
  border: 1px solid rgba(152, 190, 220, 0.12);
  border-radius: 8px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.018);
}

.session-focus-panel h3,
.practice-reference-panel h3,
.practice-proof-panel h3 {
  margin: 7px 0 8px;
  color: #eff8ff;
  font-size: 1rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.session-output-card span,
.lesson-flow span,
.practice-reference-grid strong {
  display: block;
  color: #4ce0df;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.session-output-card small {
  display: block;
  margin-top: 10px;
  color: #92a9bd;
  font-size: 0.72rem;
  line-height: 1.5;
}

.session-outcome-grid article,
.lesson-field-grid section,
.practice-detail-grid section,
.project-columns section,
.trap-box,
.production-rule-box,
.practice-preview {
  border: 1px solid rgba(152, 190, 220, 0.12);
  border-radius: 8px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.018);
}

.lesson-flow {
  display: grid;
  gap: 12px;
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.lesson-bridge-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
}

.session-outcome-grid ul,
.lesson-rule-grid ul,
.practice-detail-grid ul,
.project-columns ul,
.level-project-card ul,
.trap-box ul,
.production-rule-box ul {
  display: grid;
  gap: 7px;
  margin: 8px 0 0;
  padding-left: 18px;
  color: #bdd0dd;
  font-size: 0.78rem;
  line-height: 1.5;
}

.session-outcome-grid li,
.lesson-rule-grid li,
.practice-detail-grid li,
.project-columns li,
.level-project-card li,
.trap-box li,
.production-rule-box li {
  word-break: break-all;
  overflow-wrap: break-word;
  white-space: normal;
}

.project-columns {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)) !important;
}

.session-outcome-grid span,
.project-columns strong {
  display: block;
  color: #4ce0df;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.session-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
  background: rgba(76, 224, 223, 0.025);
}

.lesson-block-list {
  display: grid;
  gap: 16px;
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.lesson-list-header {
  display: grid;
  gap: 7px;
  padding-bottom: 2px;
}

.lesson-list-header h3 {
  margin: 0;
  color: #eff8ff;
  font-size: 1.05rem;
  letter-spacing: 0;
}

.lesson-list-header p {
  max-width: 720px;
}

.lesson-block {
  overflow: hidden;
}

.lesson-block-summary {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  padding: 16px 18px;
  list-style: none;
  background: linear-gradient(135deg, rgba(76, 224, 223, 0.08), rgba(255, 182, 91, 0.035));
}

.lesson-block-summary::-webkit-details-marker {
  display: none;
}

.lesson-summary-index {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(76, 224, 223, 0.35);
  border-radius: 8px;
  color: #4ce0df;
  background: rgba(76, 224, 223, 0.07);
  font-size: 0.7rem;
  font-weight: 900;
}

.lesson-summary-copy strong,
.lesson-summary-copy small {
  display: block;
}

.lesson-summary-copy strong {
  overflow: hidden;
  color: #eff8ff;
  font-size: 0.96rem;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-summary-copy small {
  margin-top: 4px;
  color: #92a9bd;
  font-size: 0.72rem;
  line-height: 1.45;
}

.lesson-summary-chevron {
  width: 10px;
  height: 10px;
  border-right: 2px solid #4ce0df;
  border-bottom: 2px solid #4ce0df;
  transform: rotate(45deg);
  transition: transform 160ms ease;
}

.lesson-block[open] .lesson-summary-chevron {
  transform: rotate(225deg);
}

.lesson-block-body {
  border-top: 1px solid rgba(152, 190, 220, 0.12);
}

.lesson-block-header {
  padding: 18px;
  background: linear-gradient(135deg, rgba(76, 224, 223, 0.08), rgba(255, 182, 91, 0.035));
}

.roadmap-code {
  margin: 0 clamp(18px, 3vw, 28px) 18px;
}

.roadmap-inline-visual {
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.lesson-block .roadmap-inline-visual {
  padding: 18px;
}

.roadmap-inline-visual .visual-section-header h3 {
  margin-bottom: 0;
  letter-spacing: 0;
}

.roadmap-inline-visual .visual-slider-mount,
.roadmap-inline-visual .visual-slider-empty {
  min-height: 240px;
}

.roadmap-inline-visual .visual-slider-stage {
  min-height: min(58vh, 560px);
}

.lesson-rule-grid {
  padding-top: 0;
}

.trap-box {
  border-color: rgba(255, 123, 114, 0.2);
  background: rgba(255, 123, 114, 0.045);
}

.production-rule-box {
  border-color: rgba(111, 229, 168, 0.2);
  background: rgba(111, 229, 168, 0.055);
}

.micro-check-section {
  display: grid;
  gap: 10px;
  padding: 0 clamp(18px, 3vw, 28px) 20px;
}

.micro-check {
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.018);
}

.micro-check summary {
  cursor: pointer;
  padding: 12px 14px;
  color: #eff8ff;
  font-size: 0.8rem;
  font-weight: 800;
}

.micro-check div {
  padding: 0 14px 14px;
  color: #92a9bd;
  font-size: 0.78rem;
  line-height: 1.55;
}

.micro-check {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.micro-check h4 {
  margin: 0;
  color: #eff8ff;
  font-size: 0.86rem;
  line-height: 1.35;
}

.micro-check-options {
  display: grid;
  gap: 8px;
}

.micro-check-options button {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: start;
  gap: 9px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  padding: 10px;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.02);
  text-align: left;
}

.micro-check-options button.correct {
  border-color: rgba(111, 229, 168, 0.45);
  background: rgba(111, 229, 168, 0.08);
}

.micro-check-options button.incorrect {
  border-color: rgba(255, 123, 114, 0.45);
  background: rgba(255, 123, 114, 0.08);
}

.micro-check-options span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  color: #06111c;
  background: #4ce0df;
  font-size: 0.72rem;
  font-weight: 900;
}

.micro-check-options strong {
  font-size: 0.78rem;
  line-height: 1.4;
}

.micro-check-feedback {
  margin-top: 0 !important;
  padding: 10px 12px;
  border-radius: 8px;
  color: #6fe5a8 !important;
  background: rgba(111, 229, 168, 0.08);
}

.practice-preview {
  margin: 0 clamp(18px, 3vw, 28px) 22px;
}

.practice-reference-panel,
.practice-workspace-panel,
.practice-proof-panel {
  display: grid;
  gap: 14px;
  margin: 18px 0;
}

.practice-workspace-panel {
  border: 1px solid rgba(76, 224, 223, 0.22);
  border-radius: 8px;
  padding: 16px;
  background: rgba(76, 224, 223, 0.035);
}

.practice-workspace-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.practice-workspace-header h3 {
  margin: 7px 0 8px;
  color: #eff8ff;
  font-size: 1rem;
  letter-spacing: 0;
}

.practice-web-editor {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  border: 1px solid rgba(152, 190, 220, 0.18);
  border-radius: 8px;
  padding: 14px;
  color: #eff8ff;
  background: rgba(4, 12, 21, 0.86);
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.82rem;
  line-height: 1.55;
}

.practice-workspace-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: #92a9bd;
  font-size: 0.72rem;
  line-height: 1.4;
}

.practice-reference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.practice-reference-grid section {
  border: 1px solid rgba(152, 190, 220, 0.12);
  border-radius: 8px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.018);
}

.practice-reference-code {
  display: grid;
  gap: 12px;
}

.practice-reference-code > div > span {
  display: block;
  margin-bottom: 8px;
  color: #4ce0df;
  font-size: 0.64rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.practice-reference-code .roadmap-code,
.practice-reference-code .code-example-pair {
  margin: 0;
}

.practice-proof-list {
  display: grid;
  gap: 9px;
}

.practice-proof-list label {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  border: 1px solid rgba(152, 190, 220, 0.12);
  border-radius: 8px;
  padding: 10px 12px;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.02);
  font-size: 0.8rem;
  line-height: 1.45;
}

.practice-proof-list input {
  margin-top: 3px;
}

.level-project-card {
  display: grid;
  gap: 14px;
  margin: clamp(18px, 3vw, 28px);
  padding: 20px;
  background: linear-gradient(135deg, rgba(255, 182, 91, 0.075), transparent 50%), rgba(10, 24, 40, 0.88);
}

.roadmap-session-pagination {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: clamp(18px, 3vw, 28px);
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.roadmap-session-nav-card {
  display: grid;
  gap: 7px;
  min-height: 112px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 8px;
  padding: 16px;
  color: #eff8ff;
  background: rgba(255, 255, 255, 0.026);
  text-align: left;
}

.roadmap-session-nav-card.center {
  text-align: center;
}

.roadmap-session-nav-card.disabled {
  opacity: 0.55;
}

.roadmap-session-nav-card small {
  color: #4ce0df;
  font-size: 0.66rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.roadmap-session-nav-card strong {
  color: #eff8ff;
  font-size: 0.96rem;
  line-height: 1.3;
}

.roadmap-session-nav-card span {
  color: #92a9bd;
  font-size: 0.72rem;
  line-height: 1.45;
}

.practice-summary-card.done,
.session-card.done,
.capability-progress-row.done {
  border-color: rgba(111, 229, 168, 0.3);
}

.roadmap-practice-layout .practice-card {
  border-radius: 8px;
}

.inline-search {
  display: grid;
  gap: 6px;
  width: min(360px, 100%);
}

.glossary-card {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.related-lessons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.capability-progress-row {
  grid-template-columns: 12px minmax(0, 1fr) 42px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(152, 190, 220, 0.1);
}

.capability-progress-row b {
  color: #4ce0df;
  font-size: 0.75rem;
}

@media (max-width: 1160px) {
  .dashboard-card-grid,
  .dashboard-focus-grid,
  .roadmap-level-strip,
  .session-card-grid,
  .practice-card-grid,
  .glossary-grid,
  .level-project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  body.learn-sidebar-open {
    overflow: hidden;
  }
  .learn-layout {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .learn-curriculum-toggle {
    position: sticky;
    top: calc(76px + 10px);
    z-index: 34;
    display: inline-flex;
    width: max-content;
    align-items: center;
    gap: 8px;
    margin: 0 0 4px;
    border: 1px solid rgba(152, 190, 220, 0.16);
    border-radius: 8px;
    padding: 9px 12px;
    color: #eff8ff;
    background: rgba(10, 24, 40, 0.96);
    font-size: 0.75rem;
    font-weight: 900;
  }
  .learn-curriculum-icon {
    position: relative;
    width: 16px;
    height: 12px;
    border-top: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
  }
  .learn-curriculum-icon::after {
    position: absolute;
    top: 3px;
    left: 0;
    width: 16px;
    height: 2px;
    background: currentColor;
    content: "";
  }
  .learn-sidebar-drawer-overlay.visible {
    position: fixed;
    inset: 76px 0 0;
    z-index: 70;
    display: block;
    background: rgba(0, 0, 0, 0.46);
  }
  .learn-sidebar {
    position: fixed;
    top: 76px;
    bottom: 0;
    left: 0;
    z-index: 80;
    width: calc(100vw - 54px);
    max-width: 386px;
    overflow-y: auto;
    overscroll-behavior: contain;
    transform: translateX(-105%);
    transition: transform 160ms ease;
  }
  .learn-sidebar.open {
    transform: translateX(0);
  }
  .learn-sidebar-sticky {
    position: static;
    min-height: 100%;
    max-height: none;
    overflow: visible;
    border-radius: 0;
  }
  .learn-sidebar-close {
    display: block;
    width: calc(100% - 24px);
    margin: 12px;
    border: 1px solid rgba(152, 190, 220, 0.16);
    border-radius: 8px;
    padding: 10px 12px;
    color: #eff8ff;
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.74rem;
    font-weight: 900;
  }
}
@media (max-width: 760px) {
  .roadmap-hero {
    align-items: stretch;
    flex-direction: column;
  }
  .dashboard-card-grid,
  .dashboard-focus-grid,
  .roadmap-level-strip,
  .session-card-grid,
  .practice-card-grid,
  .glossary-grid,
  .level-project-grid,
  .session-outcome-grid,
  .session-focus-panel,
  .lesson-bridge-card,
  .practice-reference-grid,
  .lesson-field-grid,
  .lesson-rule-grid,
  .practice-detail-grid,
  .project-columns {
    grid-template-columns: 1fr;
  }
  .practice-workspace-header,
  .practice-workspace-footer {
    display: grid;
  }
  .current-path-card,
  .final-goal-card {
    grid-column: span 1;
  }
  .session-actions {
    display: grid;
  }
  .learn-curriculum-toggle {
    top: 78px;
    width: 40px;
    height: 40px;
    justify-content: center;
    padding: 0;
  }
  .learn-curriculum-label {
    display: none;
  }
  .learn-sidebar {
    top: 68px;
    width: calc(100vw - 44px);
    max-width: 356px;
  }
  .learn-sidebar-drawer-overlay.visible {
    inset: 68px 0 0;
  }
  .roadmap-session-pagination {
    grid-template-columns: 1fr;
  }
  .learn-subchapter-links {
    padding-left: 18px;
  }
  .capability-progress-row {
    grid-template-columns: 12px minmax(0, 1fr);
  }
  .capability-progress-row b {
    display: none;
  }
}
.learning-overview {
  display: grid;
  gap: 30px;
}

.learning-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.3fr);
  gap: clamp(24px, 5vw, 70px);
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 18px;
  background: linear-gradient(118deg, rgba(17, 51, 69, 0.94), rgba(8, 25, 42, 0.96));
}

.learning-intro h2 {
  max-width: 880px;
  margin: 15px 0 12px;
  font-size: clamp(2rem, 4.8vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.075em;
}

.learning-intro p,
.learning-bridge-note p {
  max-width: 760px;
  margin: 0;
  color: #b6cbd9;
  font-size: 0.9rem;
  line-height: 1.75;
}

.learning-intro-progress {
  display: grid;
  align-content: center;
  gap: 9px;
  padding-left: 24px;
  border-left: 1px solid rgba(152, 190, 220, 0.16);
}

.learning-intro-progress strong,
.learning-dashboard-bridge-actions strong {
  color: #4ce0df;
  font-size: 3.2rem;
  letter-spacing: -0.08em;
}

.learning-intro-progress strong small,
.learning-dashboard-bridge-actions strong small {
  color: #92a9bd;
  font-size: 1.2rem;
}

.learning-intro-progress span,
.learning-intro-progress > small,
.learning-dashboard-bridge-actions span {
  color: #92a9bd;
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.learning-path-section {
  display: grid;
  gap: 5px;
}

.learning-lesson-list {
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: rgba(7, 20, 34, 0.74);
}

.learning-lesson-card {
  display: grid;
  width: 100%;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  align-items: center;
  gap: 15px;
  padding: 15px 18px;
  border: 0;
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
  color: #eff8ff;
  background: transparent;
  text-align: left;
  transition: 160ms ease;
}

.learning-lesson-card:last-child {
  border-bottom: 0;
}

.learning-lesson-card:hover {
  background: rgba(76, 224, 223, 0.055);
}

.learning-lesson-card.completed {
  background: rgba(111, 229, 168, 0.035);
}

.learning-lesson-number {
  color: #4ce0df;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 800;
}

.learning-lesson-card-copy,
.learning-lesson-card-meta {
  display: grid;
  gap: 4px;
}

.learning-lesson-card-copy strong {
  font-size: 0.86rem;
}

.learning-lesson-card-copy small,
.learning-lesson-card-meta small {
  color: #92a9bd;
  font-size: 0.72rem;
  line-height: 1.5;
}

.learning-lesson-card-meta {
  justify-items: end;
}

.learning-lesson-card-meta b {
  color: #4ce0df;
  font-size: 0.68rem;
}

.learning-bridge-note,
.learning-dashboard-bridge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px;
  border: 1px solid rgba(76, 224, 223, 0.2);
  border-radius: 14px;
  background: rgba(76, 224, 223, 0.045);
}

.learning-bridge-note h3,
.learning-dashboard-bridge h2 {
  margin: 8px 0 5px;
  letter-spacing: -0.04em;
}

.learning-dashboard-bridge {
  margin: 20px 0 34px;
}

.learning-dashboard-bridge-actions {
  display: grid;
  min-width: 190px;
  gap: 6px;
}

.learning-dashboard-bridge-actions strong {
  font-size: 2.35rem;
}

.learning-dashboard-bridge-actions .ghost-button {
  margin-top: 5px;
}

.learning-reader-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(270px, 0.3fr);
  align-items: start;
  gap: 20px;
}

.learning-reader-hero {
  background: linear-gradient(126deg, rgba(17, 54, 70, 0.9), rgba(10, 27, 45, 0.74));
}

.learning-mistake-note {
  padding: 15px 17px;
  border: 1px solid rgba(255, 123, 114, 0.2);
  border-left: 3px solid #ff7b72;
  color: #e1c8c9;
  background: rgba(255, 123, 114, 0.045);
  font-size: 0.82rem;
  line-height: 1.65;
}

.learning-related-parts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.learning-quiz-options {
  max-width: 760px;
}

.learning-correct {
  border-color: rgba(111, 229, 168, 0.3);
  background: rgba(111, 229, 168, 0.07);
}

.learning-correct strong {
  color: #6fe5a8;
}

.learning-incorrect {
  border-color: rgba(255, 123, 114, 0.26);
  background: rgba(255, 123, 114, 0.055);
}

.learning-incorrect strong {
  color: #ff938b;
}

.learning-reader-links {
  display: grid;
  max-height: 570px;
  overflow: auto;
}

.learning-code-panel {
  margin-top: 14px;
}

.learning-cheatsheet {
  display: grid;
  gap: 20px;
}

.learning-cheatsheet-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.learning-cheatsheet-card {
  overflow: hidden;
  padding: 17px;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 13px;
  background: rgba(13, 31, 50, 0.9);
}

.learning-cheatsheet-card h3 {
  margin: 0;
  font-size: 0.92rem;
}

.learning-ownership-note {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 13px;
}

.learning-ownership-note div {
  display: grid;
  gap: 6px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.018);
}

.learning-ownership-note div + div {
  border-left: 1px solid rgba(152, 190, 220, 0.16);
}

.learning-ownership-note strong {
  color: #4ce0df;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.learning-ownership-note span {
  color: #92a9bd;
  font-size: 0.78rem;
  line-height: 1.6;
}

@media (max-width: 1080px) {
  .learning-intro,
  .learning-reader-layout {
    grid-template-columns: 1fr;
  }
  .learning-intro-progress {
    padding-top: 18px;
    padding-left: 0;
    border-top: 1px solid rgba(152, 190, 220, 0.16);
    border-left: 0;
  }
  .learning-reader-sidebar {
    order: -1;
  }
}
@media (max-width: 680px) {
  .learning-intro {
    padding: 23px;
  }
  .learning-intro h2 {
    font-size: 2.45rem;
  }
  .learning-lesson-card {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 10px;
    padding: 13px 14px;
  }
  .learning-lesson-card-meta {
    display: none;
  }
  .learning-bridge-note,
  .learning-dashboard-bridge {
    align-items: stretch;
    flex-direction: column;
  }
  .learning-cheatsheet-grid,
  .learning-ownership-note {
    grid-template-columns: 1fr;
  }
  .learning-ownership-note div + div {
    border-top: 1px solid rgba(152, 190, 220, 0.16);
    border-left: 0;
  }
}
.advanced-overview {
  display: grid;
  gap: 30px;
}

.advanced-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.28fr);
  gap: clamp(25px, 5vw, 68px);
  overflow: hidden;
  padding: clamp(27px, 5vw, 58px);
  border: 1px solid rgba(151, 122, 255, 0.26);
  border-radius: 18px;
  background: radial-gradient(circle at 88% 18%, rgba(151, 122, 255, 0.16), transparent 30%), linear-gradient(122deg, rgba(20, 40, 65, 0.96), rgba(8, 24, 41, 0.98));
}

.advanced-intro h2 {
  max-width: 980px;
  margin: 15px 0 13px;
  font-size: clamp(2.2rem, 5vw, 4.9rem);
  line-height: 0.98;
  letter-spacing: -0.08em;
}

.advanced-intro p,
.advanced-path-summary p,
.advanced-prerequisite p {
  margin: 0;
  color: #b7cbd9;
  font-size: 0.88rem;
  line-height: 1.75;
}

.advanced-intro-stats {
  display: grid;
  align-content: center;
  gap: 1px;
  border-top: 1px solid rgba(151, 122, 255, 0.24);
}

.advanced-intro-stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(151, 122, 255, 0.2);
}

.advanced-intro-stats strong,
.advanced-progress-row strong {
  color: #b49cff;
  font-size: 2rem;
  letter-spacing: -0.08em;
}

.advanced-intro-stats span,
.advanced-progress-row span,
.advanced-progress-row small {
  color: #92a9bd;
  font-size: 0.64rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.advanced-overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.34fr);
  gap: 18px;
}

.advanced-path-summary,
.advanced-prerequisite {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 14px;
  background: rgba(10, 27, 45, 0.82);
}

.advanced-path-summary h3,
.advanced-prerequisite h3 {
  margin: 10px 0 8px;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  letter-spacing: -0.055em;
}

.advanced-progress-row {
  display: grid;
  grid-template-columns: auto minmax(180px, 0.58fr);
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(152, 190, 220, 0.16);
}

.advanced-progress-row div {
  display: grid;
  gap: 7px;
}

.advanced-progress-row strong small {
  color: #92a9bd;
  font-size: 1rem;
}

.advanced-prerequisite {
  border-color: rgba(255, 191, 102, 0.24);
  background: rgba(255, 191, 102, 0.04);
}

.advanced-prerequisite.ready {
  border-color: rgba(111, 229, 168, 0.25);
  background: rgba(111, 229, 168, 0.045);
}

.advanced-prerequisite ul {
  display: grid;
  gap: 9px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.advanced-prerequisite li {
  display: grid;
  grid-template-columns: 25px minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  padding-top: 9px;
  border-top: 1px solid rgba(152, 190, 220, 0.12);
}

.advanced-prerequisite li > span {
  color: #ffbf66;
  font-size: 0.78rem;
  font-weight: 800;
}

.advanced-prerequisite li.done > span {
  color: #6fe5a8;
}

.advanced-prerequisite li div {
  display: grid;
  gap: 3px;
}

.advanced-prerequisite li strong {
  color: #eff8ff;
  font-size: 0.78rem;
}

.advanced-prerequisite li small {
  color: #92a9bd;
  font-size: 0.67rem;
  line-height: 1.45;
}

.advanced-accordion {
  border-color: rgba(151, 122, 255, 0.2);
}

.advanced-reader-hero {
  background: radial-gradient(circle at 86% 16%, rgba(151, 122, 255, 0.15), transparent 34%), linear-gradient(126deg, rgba(22, 47, 74, 0.92), rgba(10, 27, 45, 0.76));
}

.advanced-step-list {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  padding: 0;
  border: 1px solid rgba(152, 190, 220, 0.16);
  border-radius: 11px;
  list-style: none;
  background: rgba(255, 255, 255, 0.014);
}

.advanced-step-list li {
  display: grid;
  grid-template-columns: 45px minmax(0, 1fr);
  gap: 13px;
  align-items: center;
  padding: 13px 15px;
  border-bottom: 1px solid rgba(152, 190, 220, 0.16);
}

.advanced-step-list li:last-child {
  border-bottom: 0;
}

.advanced-step-list span {
  color: #b49cff;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 800;
}

.advanced-step-list strong {
  color: #cbdde8;
  font-size: 0.8rem;
  line-height: 1.5;
}

.advanced-progress-bridge {
  border-color: rgba(151, 122, 255, 0.28);
  background: rgba(151, 122, 255, 0.055);
}

.advanced-progress-bridge .learning-dashboard-bridge-actions strong {
  color: #b49cff;
}

.advanced-knowledge-check > p {
  margin: 0;
  color: #92a9bd;
  font-size: 0.8rem;
  line-height: 1.65;
}

.advanced-retry-button {
  margin-top: 12px;
}

.advanced-check-gate {
  margin-top: 16px;
  padding: 11px 13px;
  border-left: 3px solid #ffbf66;
  color: #e8c98f;
  background: rgba(255, 191, 102, 0.06);
  font-size: 0.76rem;
  line-height: 1.55;
}

@media (max-width: 1080px) {
  .advanced-intro,
  .advanced-overview-grid {
    grid-template-columns: 1fr;
  }
  .advanced-intro-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .advanced-intro-stats div {
    display: grid;
    gap: 4px;
    border-right: 1px solid rgba(151, 122, 255, 0.2);
  }
  .advanced-intro-stats div:last-child {
    border-right: 0;
  }
}
@media (max-width: 680px) {
  .advanced-intro {
    padding: 23px;
  }
  .advanced-intro h2 {
    font-size: 2.55rem;
  }
  .advanced-intro-stats,
  .advanced-progress-row {
    grid-template-columns: 1fr;
  }
  .advanced-intro-stats div {
    display: flex;
    border-right: 0;
  }
}
@media (max-width: 1020px) {
  .site-header-inner {
    min-height: 68px;
    gap: 10px;
    padding-inline: clamp(14px, 3vw, 24px);
  }
  .menu-toggle,
  .icon-button {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border: 1px solid rgba(152, 190, 220, 0.16);
    border-radius: 9px;
    color: #92a9bd;
    background: rgba(255, 255, 255, 0.035);
  }
  .main-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: clamp(14px, 3vw, 24px);
    left: clamp(14px, 3vw, 24px);
    z-index: 50;
    display: grid;
    gap: 4px;
    padding: 10px;
    border: 1px solid rgba(152, 190, 220, 0.16);
    border-radius: 12px;
    background: rgba(6, 18, 31, 0.98);
    box-shadow: 0 18px 46px rgba(0, 0, 0, 0.34);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: 160ms ease;
  }
  .main-nav.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-item {
    width: 100%;
  }
  .main-nav .nav-item:hover,
  .main-nav .nav-item.active {
    transform: none !important;
  }
  .sidebar-overlay.visible {
    position: fixed;
    inset: 68px 0 0;
    z-index: 35;
    display: block;
    background: rgba(0, 0, 0, 0.44);
  }
  .search-box {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: clamp(14px, 3vw, 24px);
    z-index: 60;
    width: min(360px, 100vw - 28px);
    background: #0d2034;
  }
  .search-box.open {
    display: flex;
  }
}
@media (max-width: 620px) {
  .site-header-inner {
    gap: 7px;
    padding-inline: 12px;
  }
  .brand {
    gap: 8px;
  }
  .brand > span:last-child {
    display: none;
  }
  .topbar-actions {
    position: absolute;
    right: 12px;
    gap: 6px;
    margin-left: 0;
  }
  .language-switcher {
    gap: 2px;
    margin-inline-end: 0;
    padding: 6px 5px;
  }
  .language-option {
    font-size: 0.64rem;
  }
  .context-bar {
    min-height: 78px;
    padding: 16px 18px;
  }
  .context-progress {
    display: none;
  }
  .language-prompt-actions {
    grid-template-columns: 1fr;
  }
}
:root {
  --bg: #F8F5EE;
  --bg-soft: #FED352;
  --panel: #FAF7F0;
  --panel-strong: #ffffff;
  --panel-light: #FCECB5;
  --line: #222222;
  --text: #222222;
  --muted: #52565E;
  --cyan: #8BE3FA;
  --blue: #7098FF;
  --purple: #C1A2FF;
  --green: #83E8A2;
  --orange: #FFA74D;
  --red: #FF859C;
  --shadow: 5px 5px 0 #222222;
  --radius: 6px;
  --neo-ink: #222222;
  --neo-paper: #FAF7F0;
  --neo-yellow: #FED352;
  --neo-pink: #FF94B4;
  --neo-cyan: #8BE3FA;
  --neo-green: #83E8A2;
  --neo-purple: #C1A2FF;
  --neo-orange: #FFA74D;
  --neo-grid: rgba(34, 34, 34, 0.07);
  --hl-comment: #7C8594;
  --hl-keyword: #FF94B4;
  --hl-builtin: #8BE3FA;
  --hl-method: #C1A2FF;
  --hl-string: #83E8A2;
  --hl-number: #FFA74D;
  color-scheme: light;
}

* {
  letter-spacing: 0 !important;
}

html,
body {
  color: var(--neo-ink);
  background-color: var(--bg);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-color: var(--bg);
  background-image: linear-gradient(var(--neo-grid) 1px, transparent 1px), linear-gradient(90deg, var(--neo-grid) 1px, transparent 1px);
  background-size: 34px 34px;
  background-position: -1px -1px;
  content: "";
  pointer-events: none;
}

.ambient,
.hero-card::after {
  display: none !important;
}

button,
input,
select,
textarea {
  color: var(--neo-ink);
}

button,
a,
input,
select,
textarea,
.visual-slider {
  outline-color: var(--neo-ink);
}

.site-header,
.context-bar,
.main-nav,
.sidebar-overlay.visible {
  border-color: var(--neo-ink);
  background: var(--neo-yellow);
  backdrop-filter: none;
}

.site-header {
  border-bottom: 3px solid var(--neo-ink);
}

.context-bar {
  border-bottom: 3px solid var(--neo-ink);
}

.brand {
  color: var(--neo-ink);
}

.brand small,
.chapter-copy small,
.lesson-copy small,
.reader-progress-note small {
  color: var(--muted) !important;
}

.context-progress-row,
.visual-section-header p,
.reader-sidebar-heading p,
.section-header p,
.progress-row span,
.group-row span,
.path-line span,
.path-line strong,
.stat-card span,
.stat-card em,
.learning-dashboard-bridge-actions span,
.learning-lesson-card-meta span,
.hero-card p,
.learning-dashboard-bridge p,
.pf-card p,
.pf-instruction,
.reader-section p,
.reader-practice-cta p,
.course-intro p,
.course-description p,
.course-facts p,
.learning-intro p,
.learning-bridge-note p,
.advanced-intro p,
.advanced-path-summary p,
.advanced-prerequisite p,
.path-card p,
.glass-card p,
.part-card p,
.concept-card p,
.warning-card p,
.practice-card p,
.quiz-card p,
.language-prompt-card p,
.ftue-layout p {
  color: var(--neo-ink) !important;
}

.brand b,
.eyebrow,
.kicker,
.section-kicker,
.part-number,
.status-pill,
.tag,
.difficulty,
.result-label,
.context-progress strong,
.chapter-code,
.lesson-state,
.lesson-open,
.reader-nav-card small,
.chapter-reader-link span,
.score,
.visual-slide-status,
.visual-slide-counter,
.learning-lesson-number,
.learning-lesson-card-meta b,
.learning-ownership-note strong,
.advanced-step-list span,
.pf-nav-header small,
.pf-legend-item,
.pf-num-btn.current,
.option-letter {
  color: var(--neo-ink) !important;
}

.brand-mark,
.chapter-code,
.lesson-state,
.theme-heading > span,
.option-letter,
.pf-num-btn,
.visual-slider-dot,
.reader-learning-list li span {
  border: 2px solid var(--neo-ink) !important;
  background: var(--neo-cyan) !important;
}

.brand-mark {
  border-radius: 6px;
  box-shadow: 3px 3px 0 var(--neo-ink);
}

.brand-mark span {
  border-radius: 2px;
  background: var(--neo-ink);
}

.nav-item,
.language-switcher,
.search-box,
.menu-toggle,
.icon-button,
.learn-curriculum-toggle,
.learn-sidebar-close,
.primary-button,
.secondary-button,
.ghost-button,
.danger-button,
.roadmap-level-card button,
.session-card footer button,
.practice-summary-card footer button,
.related-lessons button,
.card-footer button,
.reader-breadcrumb button,
.level-choice-card footer button,
.visual-slider-button,
.ftue-skip,
.language-option {
  border: 2px solid var(--neo-ink) !important;
  border-radius: 6px !important;
  color: var(--neo-ink) !important;
  background: var(--neo-paper) !important;
  box-shadow: 4px 4px 0 var(--neo-ink);
  text-decoration: none;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.nav-item,
.language-option,
.ftue-skip,
.card-footer button,
.reader-breadcrumb button {
  padding: 8px 10px;
}

.nav-item:hover,
.nav-item.active,
.language-option:hover,
.language-option.active,
.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.danger-button:hover,
.roadmap-level-card button:hover,
.session-card footer button:hover,
.practice-summary-card footer button:hover,
.related-lessons button:hover,
.card-footer button:hover,
.reader-breadcrumb button:hover,
.level-choice-card footer button:hover,
.visual-slider-button:hover,
.ftue-skip:hover,
.menu-toggle:hover,
.icon-button:hover,
.learn-curriculum-toggle:hover,
.learn-sidebar-close:hover {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--neo-ink);
}

.nav-item.active,
.primary-button,
.status-pill.done,
.status-pill.safe,
.practice-done-btn,
.visual-slider-dot.active,
.quiz-step.done,
.ftue-dots span.active {
  background: var(--neo-green) !important;
}

.secondary-button,
.nav-item:hover,
.language-option.active {
  background: var(--neo-cyan) !important;
}

.ghost-button,
.card-footer button,
.reader-breadcrumb button {
  background: var(--neo-yellow) !important;
}

.danger-button,
.status-pill.warning,
.option-button.incorrect,
.practice-option.incorrect {
  background: var(--neo-pink) !important;
}

.search-box input,
.learn-search input,
.inline-search input,
.filter-panel input,
.filter-panel select,
.practice-answer,
.pf-practice-answer {
  min-height: 42px;
  border: 2px solid var(--neo-ink) !important;
  border-radius: 6px !important;
  color: var(--neo-ink) !important;
  background: #ffffff !important;
  box-shadow: 4px 4px 0 var(--neo-ink);
}

.search-box input::placeholder,
.learn-search input::placeholder,
.inline-search input::placeholder,
.filter-panel input::placeholder {
  color: #575757;
}

.search-box:focus-within,
.learn-search input:focus,
.inline-search input:focus,
.filter-panel input:focus,
.filter-panel select:focus,
.practice-answer:focus,
.pf-practice-answer:focus {
  box-shadow: 2px 2px 0 var(--neo-ink);
  transform: translate(2px, 2px);
}

.page-content {
  padding-block: clamp(22px, 4vw, 56px);
}

.hero-card,
.roadmap-hero,
.roadmap-panel,
.roadmap-level-card,
.session-card,
.practice-summary-card,
.glossary-card,
.roadmap-slide-thumb img,
.roadmap-session-nav-card,
.lesson-block,
.level-project-card,
.session-reader,
.learn-sidebar-sticky,
.session-outcome-grid article,
.lesson-field-grid section,
.practice-detail-grid section,
.project-columns section,
.practice-preview,
.micro-check,
.glass-card,
.stat-card,
.part-card,
.theme-card,
.concept-card,
.warning-card,
.quiz-card,
.practice-card,
.course-intro,
.course-description,
.course-facts,
.course-accordion,
.level-course-body,
.level-course-toolbar,
.level-choice-card,
.lesson-reader,
.reader-sidebar-sticky,
.reader-section,
.reader-hero,
.reader-practice-cta,
.reader-nav-card,
.reader-safe-note,
.reader-warning-list li,
.reader-progress-note,
.chapter-accordion,
.outline-lesson,
.chapter-reader-link,
.learning-intro,
.learning-lesson-list,
.learning-lesson-card,
.learning-bridge-note,
.learning-dashboard-bridge,
.learning-mistake-note,
.learning-cheatsheet-card,
.learning-ownership-note,
.advanced-intro,
.advanced-path-summary,
.advanced-prerequisite,
.advanced-step-list,
.advanced-knowledge-check,
.advanced-check-gate,
.pf-card,
.pf-nav-sticky,
.pf-nav-track,
.code-panel,
.code-example-label,
.code-example-explanation,
.option-button,
.explanation,
.practice-option,
.practice-feedback,
.solution-panel,
.progress-row,
.group-row,
.filter-panel,
.empty-state,
.language-prompt-card,
.ftue-modal,
.ftue-panel,
.ftue-route-map,
.visual-slider-stage,
.visual-slider-empty,
.visual-slide-frame img {
  border: 3px solid var(--neo-ink) !important;
  border-radius: 6px !important;
  color: var(--neo-ink);
  background: var(--neo-paper) !important;
  box-shadow: var(--shadow);
  backdrop-filter: none !important;
}

.reader-section,
.reader-hero,
.reader-practice-cta,
.reader-sidebar-heading,
.reader-progress-note,
.reader-breadcrumb,
.chapter-accordion + .chapter-accordion,
.chapter-accordion summary,
.chapter-lessons,
.outline-lesson,
.chapter-reader-link,
.reader-pagination,
.reader-nav-card + .reader-nav-card,
.learning-lesson-card,
.advanced-step-list li,
.code-panel header,
.ftue-progress,
.ftue-footer,
.level-course-body,
.filter-panel,
.visual-slider-footer,
.pf-footer-nav,
.pf-nav-legend,
.code-example-pair {
  border-color: var(--neo-ink) !important;
}

.hero-card,
.roadmap-hero,
.reader-hero,
.course-intro,
.learning-intro,
.advanced-intro,
.learning-reader-hero,
.advanced-reader-hero {
  background: var(--neo-yellow) !important;
}

.path-card,
.learning-dashboard-bridge,
.learning-bridge-note,
.reader-practice-cta,
.part-visual-section,
.advanced-progress-bridge,
.visual-slider-empty {
  background: var(--neo-cyan) !important;
}

.stat-card:nth-child(4n+1),
.roadmap-panel:nth-child(4n+1),
.roadmap-level-card:nth-child(4n+1),
.session-card:nth-child(4n+1),
.practice-summary-card:nth-child(4n+1),
.glossary-card:nth-child(4n+1),
.roadmap-session-nav-card:nth-child(4n+1),
.part-card:nth-child(4n+1),
.learning-lesson-card:nth-child(4n+1),
.outline-lesson:nth-child(4n+1),
.reader-nav-card:nth-child(4n+1),
.pf-num-btn:nth-child(4n+1) {
  background: var(--neo-paper) !important;
}

.stat-card:nth-child(4n+2),
.roadmap-panel:nth-child(4n+2),
.roadmap-level-card:nth-child(4n+2),
.session-card:nth-child(4n+2),
.practice-summary-card:nth-child(4n+2),
.glossary-card:nth-child(4n+2),
.roadmap-session-nav-card:nth-child(4n+2),
.part-card:nth-child(4n+2),
.learning-lesson-card:nth-child(4n+2),
.outline-lesson:nth-child(4n+2),
.reader-nav-card:nth-child(4n+2),
.pf-num-btn:nth-child(4n+2) {
  background: #FFE885 !important;
}

.stat-card:nth-child(4n+3),
.roadmap-panel:nth-child(4n+3),
.roadmap-level-card:nth-child(4n+3),
.session-card:nth-child(4n+3),
.practice-summary-card:nth-child(4n+3),
.glossary-card:nth-child(4n+3),
.roadmap-session-nav-card:nth-child(4n+3),
.part-card:nth-child(4n+3),
.learning-lesson-card:nth-child(4n+3),
.outline-lesson:nth-child(4n+3),
.reader-nav-card:nth-child(4n+3),
.pf-num-btn:nth-child(4n+3) {
  background: #A6EFFF !important;
}

.stat-card:nth-child(4n),
.roadmap-panel:nth-child(4n),
.roadmap-level-card:nth-child(4n),
.session-card:nth-child(4n),
.practice-summary-card:nth-child(4n),
.glossary-card:nth-child(4n),
.roadmap-session-nav-card:nth-child(4n),
.part-card:nth-child(4n),
.learning-lesson-card:nth-child(4n),
.outline-lesson:nth-child(4n),
.reader-nav-card:nth-child(4n),
.pf-num-btn:nth-child(4n) {
  background: #FFB3D1 !important;
}

.part-card,
.roadmap-level-card,
.session-card,
.practice-summary-card,
.glossary-card,
.roadmap-session-nav-card,
.learning-lesson-card,
.outline-lesson,
.chapter-reader-link,
.reader-nav-card,
.option-button,
.practice-option,
.pf-num-btn {
  transform: translate(0, 0);
}

.part-card:hover,
.roadmap-level-card:hover,
.session-card:hover,
.practice-summary-card:hover,
.glossary-card:hover,
.roadmap-session-nav-card:hover,
.learning-lesson-card:hover,
.outline-lesson:hover,
.outline-lesson.active,
.chapter-reader-link:hover,
.chapter-reader-link.active,
.reader-nav-card:hover,
.option-button:hover:not(:disabled),
.practice-option:hover,
.practice-option.selected,
.pf-num-btn:hover:not(:disabled),
.pf-num-btn.current {
  border-color: var(--neo-ink) !important;
  color: var(--neo-ink) !important;
  background: var(--neo-green) !important;
  box-shadow: 3px 3px 0 var(--neo-ink);
  transform: translate(4px, 4px);
}

.chapter-accordion summary:hover,
.chapter-accordion[open] > summary {
  background: var(--neo-cyan) !important;
}

.chapter-chevron {
  border-color: var(--neo-ink);
}

.reader-meta span,
.status-pill,
.visual-slide-status,
.difficulty,
.tag,
.result-label,
.code-example-label,
.pf-type-badge {
  border: 2px solid var(--neo-ink) !important;
  border-radius: 999px !important;
  color: var(--neo-ink) !important;
  background: var(--neo-yellow) !important;
  box-shadow: 2px 2px 0 var(--neo-ink);
}

.reader-safe-note,
.option-button.correct,
.practice-option.correct,
.practice-feedback.correct,
.learning-correct,
.solution-panel,
.advanced-prerequisite.ready,
.pf-num-btn.solved,
.practice-done-btn {
  background: var(--neo-green) !important;
}

.reader-warning-list li,
.warning-card,
.learning-mistake-note,
.option-button.incorrect,
.practice-feedback.incorrect,
.learning-incorrect,
.advanced-check-gate,
.pf-num-btn.attempted {
  background: var(--neo-pink) !important;
}

.code-panel {
  overflow: hidden;
  background: #111111 !important;
}

.code-panel header {
  color: var(--neo-ink) !important;
  background: var(--neo-yellow) !important;
}

.code-panel.correct {
  background: #0E1D13 !important;
}

.code-panel.correct header {
  background: var(--neo-green) !important;
  border-bottom: 2px solid var(--neo-ink) !important;
}

.code-panel.correct pre {
  background: #0E1D13 !important;
}

.code-panel.incorrect {
  background: #251215 !important;
}

.code-panel.incorrect header {
  background: var(--neo-pink) !important;
  border-bottom: 2px solid var(--neo-ink) !important;
}

.code-panel.incorrect pre {
  background: #251215 !important;
}

pre {
  color: #f8f8f8 !important;
  background: #111111 !important;
}

.hl-comment {
  color: var(--hl-comment) !important;
  font-style: italic;
}

.hl-keyword {
  color: var(--hl-keyword) !important;
  font-weight: bold;
}

.hl-builtin {
  color: var(--hl-builtin) !important;
}

.hl-method {
  color: var(--hl-method) !important;
}

.hl-string {
  color: var(--hl-string) !important;
}

.hl-number {
  color: var(--hl-number) !important;
}

.window-dots i {
  width: 10px;
  height: 10px;
  border: 2px solid var(--neo-ink);
  background: var(--neo-pink);
}

.window-dots i:nth-child(2) {
  background: var(--neo-orange);
}

.window-dots i:nth-child(3) {
  background: var(--neo-green);
}

.progress-track,
.pf-nav-track,
.quiz-step,
.ftue-dots span {
  height: 10px;
  overflow: hidden;
  border: 2px solid var(--neo-ink) !important;
  border-radius: 999px !important;
  background: #ffffff !important;
}

.progress-track span,
.pf-nav-track span,
.quiz-step.done,
.quiz-step.current,
.ftue-dots span.active {
  border-radius: inherit;
  background: var(--neo-pink) !important;
}

.quiz-step.current {
  background: var(--neo-orange) !important;
}

.reader-learning-list li,
.advanced-step-list li,
.expected-list li,
.weak-list li {
  color: var(--neo-ink) !important;
}

.visual-slider-stage {
  min-height: 330px;
  background: linear-gradient(45deg, rgba(17, 17, 17, 0.08) 25%, transparent 25%), linear-gradient(-45deg, rgba(17, 17, 17, 0.08) 25%, transparent 25%), #ffffff !important;
  background-size: 18px 18px !important;
  touch-action: pan-y;
}

.visual-slide-frame img {
  background: #ffffff !important;
  box-shadow: 5px 5px 0 var(--neo-ink);
}

.visual-slider-button {
  width: 46px;
  height: 46px;
  font-size: 1.85rem;
  background: var(--neo-yellow) !important;
}

.visual-slider-dot {
  width: 14px;
  height: 14px;
  box-shadow: 2px 2px 0 var(--neo-ink);
}

.language-prompt-overlay,
.ftue-overlay {
  background: rgba(17, 17, 17, 0.5) !important;
  backdrop-filter: none !important;
}

.ftue-number {
  color: var(--neo-pink);
  text-shadow: 4px 4px 0 var(--neo-ink);
}

.pf-dot {
  border: 2px solid var(--neo-ink);
  border-radius: 2px;
}

.pf-dot.active,
.pf-dot.solved,
.pf-dot.attempted,
.pf-dot.locked {
  background: var(--neo-ink);
}

h1,
h2,
h3,
h4,
strong,
.stat-card strong,
.advanced-intro-stats strong,
.learning-intro-progress strong,
.learning-dashboard-bridge-actions strong {
  color: var(--neo-ink) !important;
}

.hero-card h2,
.roadmap-hero h2,
.course-intro h2,
.reader-hero h2,
.learning-intro h2,
.advanced-intro h2 {
  text-shadow: 3px 3px 0 var(--neo-pink);
}

.main-nav.open,
.search-box.open {
  box-shadow: var(--shadow);
}

/* ─── Contrast fixes: dark text on all bright neo backgrounds ─── */
/* Yellow hero / intro sections: override muted/pale text → dark ink */
.hero-card p,
.hero-card small,
.hero-card span:not(.section-kicker):not(.part-number),
.roadmap-hero p,
.roadmap-hero small,
.roadmap-hero span:not(.section-kicker):not(.part-number),
.course-intro p,
.course-intro small,
.course-intro-copy > p,
.reader-hero p,
.reader-hero small,
.learning-intro p,
.learning-intro small,
.learning-intro-progress span,
.learning-intro-progress > small,
.advanced-intro p,
.advanced-intro small {
  color: #3a3320 !important; /* dark warm brown – readable on yellow */
}

/* Section kickers on yellow/cyan/green backgrounds need dark text */
.hero-card .section-kicker,
.roadmap-hero .section-kicker,
.course-intro .section-kicker,
.reader-hero .section-kicker,
.learning-intro .section-kicker,
.advanced-intro .section-kicker,
.learning-bridge-note .section-kicker,
.reader-practice-cta .section-kicker,
.path-card .section-kicker {
  color: #3a3320 !important;
  border-color: rgba(34, 34, 34, 0.25) !important;
  background: rgba(255, 255, 255, 0.35) !important;
}

/* Cyan card backgrounds (.path-card, .learning-bridge-note, .reader-practice-cta) */
.path-card p,
.path-card small,
.path-card span,
.roadmap-panel p,
.roadmap-panel small,
.roadmap-panel span,
.roadmap-level-card p,
.session-card p,
.practice-summary-card p,
.glossary-card p,
.session-reader p,
.session-outcome-grid p,
.session-outcome-grid li,
.lesson-block p,
.lesson-block li,
.lesson-field-grid p,
.lesson-rule-grid p,
.lesson-rule-grid li,
.practice-preview p,
.micro-check summary,
.micro-check div,
.micro-check li,
.practice-detail-grid p,
.practice-detail-grid li,
.project-columns p,
.project-columns li,
.roadmap-session-nav-card small,
.roadmap-session-nav-card strong,
.roadmap-session-nav-card span,
.learning-bridge-note p,
.learning-bridge-note small,
.learning-bridge-note h3,
.reader-practice-cta p,
.reader-practice-cta small,
.reader-practice-cta h3 {
  color: #1a3440 !important; /* dark teal – readable on cyan */
}

.session-reader p,
.session-reader li,
.lesson-block p,
.lesson-block li,
.lesson-field-grid p,
.lesson-rule-grid p,
.lesson-rule-grid li,
.practice-preview p,
.micro-check summary,
.micro-check div,
.micro-check li,
.practice-detail-grid p,
.practice-detail-grid li,
.project-columns p,
.project-columns li,
.roadmap-session-nav-card small,
.roadmap-session-nav-card strong,
.roadmap-session-nav-card span {
  color: var(--neo-ink) !important;
}

.roadmap-slide-thumb figcaption {
  border: 2px solid var(--neo-ink) !important;
  border-radius: 999px !important;
  color: var(--neo-ink) !important;
  background: var(--neo-yellow) !important;
  box-shadow: 2px 2px 0 var(--neo-ink);
}

.lesson-field-grid span,
.lesson-rule-grid span,
.practice-preview span,
.practice-detail-grid span,
.project-columns strong,
.session-outcome-grid span {
  display: inline-block;
  width: max-content;
  max-width: 100%;
  margin-bottom: 8px;
  border: 2px solid var(--neo-ink) !important;
  border-radius: 6px;
  padding: 4px 7px;
  color: var(--neo-ink) !important;
  background: var(--neo-cyan) !important;
  box-shadow: 2px 2px 0 var(--neo-ink);
}

.trap-box,
.explanation.incorrect,
.option-button.incorrect {
  background: #FFD0DC !important;
}

.production-rule-box,
.explanation.correct,
.option-button.correct {
  background: var(--neo-green) !important;
}

.explanation.correct,
.explanation.incorrect {
  border-width: 3px !important;
}

.explanation.correct strong::before {
  content: "CORRECT - ";
}

.explanation.incorrect strong::before {
  content: "REVIEW - ";
}

.option-button.correct .option-letter {
  background: var(--neo-green) !important;
}

.option-button.incorrect .option-letter {
  background: var(--neo-pink) !important;
}

/* nth-child colored lesson cards – text must stay dark */
.learning-lesson-card:nth-child(4n+2) strong,
.learning-lesson-card:nth-child(4n+2) small,
.learning-lesson-card:nth-child(4n+2) .learning-lesson-number,
.learning-lesson-card:nth-child(4n+2) .learning-lesson-card-meta b,
.learning-lesson-card:nth-child(4n+2) .learning-lesson-card-meta small,
.part-card:nth-child(4n+2) strong,
.part-card:nth-child(4n+2) small,
.part-card:nth-child(4n+2) p,
.outline-lesson:nth-child(4n+2) strong,
.outline-lesson:nth-child(4n+2) small,
.reader-nav-card:nth-child(4n+2) strong,
.reader-nav-card:nth-child(4n+2) small,
.stat-card:nth-child(4n+2) span,
.stat-card:nth-child(4n+2) em {
  color: #3a3320 !important; /* dark on yellow #FFE885 */
}

.learning-lesson-card:nth-child(4n+3) strong,
.learning-lesson-card:nth-child(4n+3) small,
.learning-lesson-card:nth-child(4n+3) .learning-lesson-number,
.learning-lesson-card:nth-child(4n+3) .learning-lesson-card-meta b,
.learning-lesson-card:nth-child(4n+3) .learning-lesson-card-meta small,
.part-card:nth-child(4n+3) strong,
.part-card:nth-child(4n+3) small,
.part-card:nth-child(4n+3) p,
.outline-lesson:nth-child(4n+3) strong,
.outline-lesson:nth-child(4n+3) small,
.reader-nav-card:nth-child(4n+3) strong,
.reader-nav-card:nth-child(4n+3) small,
.stat-card:nth-child(4n+3) span,
.stat-card:nth-child(4n+3) em {
  color: #0f2a35 !important; /* dark on cyan #A6EFFF */
}

.learning-lesson-card:nth-child(4n) strong,
.learning-lesson-card:nth-child(4n) small,
.learning-lesson-card:nth-child(4n) .learning-lesson-number,
.learning-lesson-card:nth-child(4n) .learning-lesson-card-meta b,
.learning-lesson-card:nth-child(4n) .learning-lesson-card-meta small,
.part-card:nth-child(4n) strong,
.part-card:nth-child(4n) small,
.part-card:nth-child(4n) p,
.outline-lesson:nth-child(4n) strong,
.outline-lesson:nth-child(4n) small,
.reader-nav-card:nth-child(4n) strong,
.reader-nav-card:nth-child(4n) small,
.stat-card:nth-child(4n) span,
.stat-card:nth-child(4n) em {
  color: #3d0f20 !important; /* dark on pink #FFB3D1 */
}

/* Hover → green background: keep ink */
.part-card:hover p,
.part-card:hover small,
.learning-lesson-card:hover small,
.outline-lesson:hover small,
.reader-nav-card:hover small,
.reader-nav-card:hover strong {
  color: var(--neo-ink) !important;
}

/* Green / pink feedback backgrounds */
.reader-safe-note,
.option-button.correct,
.practice-feedback.correct,
.learning-correct,
.solution-panel,
.practice-done-btn {
  color: #0f2a1c !important; /* dark on green */
}

.reader-safe-note strong,
.reader-safe-note span,
.learning-correct strong,
.learning-correct p,
.solution-panel p,
.solution-panel strong {
  color: #0f2a1c !important;
}

.reader-warning-list li,
.warning-card,
.learning-mistake-note,
.option-button.incorrect,
.practice-feedback.incorrect,
.learning-incorrect {
  color: #3d0f14 !important; /* dark on pink */
}

.learning-incorrect strong,
.learning-incorrect p,
.reader-warning-list li,
.warning-card p,
.warning-card strong {
  color: #3d0f14 !important;
}

/* explanation boxes on correct/incorrect */
.explanation.correct,
.explanation.learning-correct {
  color: #0f2a1c !important;
}

.explanation.incorrect,
.explanation.learning-incorrect {
  color: #3d0f14 !important;
}

/* Syntax highlight: brighter on dark code panel */
.hl-comment {
  color: #9baab8 !important;
} /* lighter grey, more visible */
.hl-keyword {
  color: #ff85a6 !important;
} /* brighter pink */
.hl-builtin {
  color: #5dd8f7 !important;
} /* brighter cyan */
.hl-method {
  color: #c8a8ff !important;
} /* brighter purple */
.hl-string {
  color: #7cee9e !important;
} /* brighter green */
.hl-number {
  color: #ffb347 !important;
} /* brighter orange */
/* Code panel header bar: text on yellow always dark */
.code-panel header span {
  color: var(--neo-ink) !important;
}

/* muted text inside stat cards (1st color, paper background) */
.stat-card:nth-child(4n+1) span,
.stat-card:nth-child(4n+1) em {
  color: #555 !important;
}

@media (max-width: 680px) {
  .visual-slider-button {
    width: 38px;
    height: 38px;
    font-size: 1.45rem;
  }
  .hero-card h2,
  .course-intro h2,
  .reader-hero h2,
  .learning-intro h2,
  .advanced-intro h2 {
    text-shadow: 2px 2px 0 var(--neo-pink);
  }
}
/* ─── Game-like FTUE Spotlight Tour ─── */
.ftue-tour-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(10, 10, 10, 0.82);
  transition: opacity 300ms ease;
  pointer-events: auto;
}

.ftue-tour-backdrop.entering {
  opacity: 0;
}

.ftue-tour-backdrop.visible {
  opacity: 1;
}

.ftue-highlighted {
  position: relative;
  z-index: 9001 !important;
  outline: 4px solid var(--neo-pink) !important;
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--neo-pink), 0 0 30px 8px rgba(255, 148, 180, 0.35), var(--shadow) !important;
  border-radius: 8px !important;
  animation: ftue-pulse 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes ftue-pulse {
  0%, 100% {
    outline-offset: 4px;
    box-shadow: 0 0 0 4px var(--neo-pink), 0 0 30px 8px rgba(255, 148, 180, 0.35), var(--shadow);
  }
  50% {
    outline-offset: 6px;
    box-shadow: 0 0 0 6px var(--neo-pink), 0 0 40px 12px rgba(255, 148, 180, 0.5), var(--shadow);
  }
}
.ftue-tour-tooltip {
  position: fixed;
  z-index: 9002;
  width: min(380px, 100vw - 36px);
  padding: 0;
  border: 3px solid var(--neo-ink);
  border-radius: 10px;
  background: var(--neo-paper);
  box-shadow: 6px 6px 0 var(--neo-ink);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), opacity 250ms ease;
  animation: ftue-tooltip-enter 400ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes ftue-tooltip-enter {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(12px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}
.ftue-tour-tooltip-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px 10px;
  border-bottom: 2px solid var(--neo-ink);
  background: var(--neo-yellow);
  border-radius: 7px 7px 0 0;
}

.ftue-tour-step-badge {
  display: grid;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  place-items: center;
  border: 2px solid var(--neo-ink);
  border-radius: 8px;
  color: var(--neo-ink);
  background: var(--neo-paper);
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 2px 2px 0 var(--neo-ink);
}

.ftue-tour-tooltip-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--neo-ink);
  line-height: 1.25;
}

.ftue-tour-tooltip-body {
  padding: 14px 16px;
}

.ftue-tour-tooltip-body p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--neo-ink);
}

.ftue-tour-tooltip-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 16px 14px;
}

.ftue-tour-dots {
  display: flex;
  gap: 5px;
}

.ftue-tour-dots span {
  width: 18px;
  height: 6px;
  border: 2px solid var(--neo-ink);
  border-radius: 999px;
  background: #ffffff;
  transition: background 200ms ease, width 200ms ease;
}

.ftue-tour-dots span.active {
  width: 28px;
  background: var(--neo-pink);
}

.ftue-tour-dots span.done {
  background: var(--neo-green);
}

.ftue-tour-tooltip-footer .button-row {
  margin-top: 0;
  gap: 6px;
}

.ftue-tour-arrow {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid var(--neo-ink);
  border-right: none;
  border-bottom: none;
  background: var(--neo-yellow);
  transform: rotate(45deg);
  z-index: 9003;
}

.ftue-tour-arrow.arrow-top {
  top: -10px;
  left: 30px;
  transform: rotate(45deg);
}

.ftue-tour-arrow.arrow-bottom {
  bottom: -10px;
  left: 30px;
  border: 3px solid var(--neo-ink);
  border-left: none;
  border-top: none;
  background: var(--neo-paper);
  transform: rotate(45deg);
}

.ftue-tour-arrow.arrow-left {
  left: -10px;
  top: 20px;
  border: 3px solid var(--neo-ink);
  border-right: none;
  border-top: none;
  background: var(--neo-paper);
  transform: rotate(45deg);
}

@media (max-width: 820px) {
  .ftue-tour-tooltip {
    position: fixed;
    bottom: 16px;
    left: 50%;
    top: auto;
    transform: translateX(-50%);
    width: calc(100vw - 32px);
    max-width: 420px;
  }
  .ftue-tour-arrow {
    display: none;
  }
}
#context-gamification {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 4px;
}
#context-gamification .level-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 6px;
  border-radius: 20px;
  background: var(--panel-strong);
  border: 2px solid var(--line);
  box-shadow: 2px 2px 0 var(--line);
}
#context-gamification .level-badge-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--neo-yellow);
  color: var(--neo-ink);
  font-weight: 800;
  font-size: 0.8rem;
  border: 2px solid var(--line);
  flex-shrink: 0;
}
#context-gamification .level-badge-icon.large {
  width: 48px;
  height: 48px;
  font-size: 1.3rem;
}
#context-gamification .level-badge-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--neo-ink);
  white-space: nowrap;
}
#context-gamification .xp-bar-container {
  flex: 1;
  min-width: 80px;
  max-width: 160px;
}
#context-gamification .xp-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--muted);
  margin-bottom: 2px;
}
#context-gamification .xp-bar-label strong {
  color: var(--neo-ink);
  font-weight: 700;
}
#context-gamification .xp-track {
  height: 6px;
  border-radius: 3px;
  background: rgba(34, 34, 34, 0.08);
  border: 1px solid rgba(34, 34, 34, 0.12);
  overflow: hidden;
}
#context-gamification .xp-track span {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: var(--neo-yellow);
  transition: width 0.5s ease;
}
#context-gamification .streak-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 14px;
  background: var(--neo-orange);
  color: var(--neo-ink);
  font-weight: 700;
  font-size: 0.75rem;
  border: 2px solid var(--line);
  box-shadow: 2px 2px 0 var(--line);
  white-space: nowrap;
}
#context-gamification .streak-chip span {
  font-size: 0.85rem;
}

#xp-toast-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 200;
  overflow: hidden;
}

.xp-toast {
  position: absolute;
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--neo-yellow);
  color: var(--neo-ink);
  font-weight: 800;
  font-size: 0.9rem;
  border: 2px solid var(--line);
  box-shadow: 3px 3px 0 var(--line);
  pointer-events: none;
  opacity: 0;
  transform: translateY(0);
  transition: opacity 0.3s ease, transform 0.3s ease;
  white-space: nowrap;
}
.xp-toast.visible {
  opacity: 1;
  transform: translateY(-28px);
}
.xp-toast.negative {
  background: var(--neo-pink);
}

.gamification-dashboard-widget {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}
.gamification-dashboard-widget .glass-card {
  padding: 16px;
}
.gamification-dashboard-widget .level-card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.gamification-dashboard-widget .xp-bar-container {
  width: 100%;
}
.gamification-dashboard-widget .xp-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 3px;
}
.gamification-dashboard-widget .xp-bar-label strong {
  color: var(--neo-ink);
  font-weight: 700;
}
.gamification-dashboard-widget .xp-track {
  height: 8px;
  border-radius: 4px;
  background: rgba(34, 34, 34, 0.08);
  border: 1px solid rgba(34, 34, 34, 0.12);
  overflow: hidden;
}
.gamification-dashboard-widget .xp-track span {
  display: block;
  height: 100%;
  border-radius: 4px;
  background: var(--neo-yellow);
  transition: width 0.5s ease;
}

.streak-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
}
.streak-display .streak-fire {
  font-size: 2rem;
  animation: fire-glow 1.5s ease-in-out infinite alternate;
}
.streak-display strong {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--neo-ink);
}
.streak-display small {
  font-size: 0.7rem;
  color: var(--muted);
}

.streak-freeze-badge {
  display: block;
  margin-top: 8px;
  padding: 3px 10px;
  border-radius: 12px;
  background: var(--neo-cyan);
  color: var(--neo-ink);
  font-size: 0.7rem;
  font-weight: 700;
  text-align: center;
  border: 1px solid var(--line);
}

@keyframes fire-glow {
  0% {
    filter: drop-shadow(0 0 2px var(--neo-orange));
    transform: scale(1);
  }
  100% {
    filter: drop-shadow(0 0 8px var(--neo-orange));
    transform: scale(1.08);
  }
}
.daily-ring-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 8px;
}
.daily-ring-wrap canvas {
  width: 80px;
  height: 80px;
}

.achievements-preview strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--neo-ink);
  margin-top: 4px;
}
.achievements-preview strong small {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.achievement-count-pill {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 14px;
  background: var(--neo-yellow);
  color: var(--neo-ink);
  font-weight: 700;
  font-size: 0.8rem;
  border: 2px solid var(--line);
  box-shadow: 2px 2px 0 var(--line);
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-top: 12px;
}

.achievement-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 8px;
  border-radius: var(--radius);
  border: 2px solid var(--line);
  background: var(--panel-strong);
  box-shadow: 3px 3px 0 var(--line);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.achievement-slot:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--line);
}
.achievement-slot.locked {
  background: rgba(34, 34, 34, 0.03);
  box-shadow: none;
  cursor: default;
}
.achievement-slot.locked:hover {
  transform: none;
  box-shadow: none;
}

.achievement-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.3rem;
  border: 2px solid var(--line);
  flex-shrink: 0;
}

.achievement-name {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--neo-ink);
  text-align: center;
  line-height: 1.2;
}

.achievement-date {
  font-size: 0.6rem;
  color: var(--muted);
}

.achievement-hint {
  font-size: 0.85rem;
  opacity: 0.4;
}

.level-up-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(34, 34, 34, 0.45);
  animation: fade-in 0.25s ease;
}

.level-up-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 40px;
  border-radius: var(--radius);
  background: var(--panel-strong);
  border: 3px solid var(--line);
  box-shadow: 8px 8px 0 var(--line);
  text-align: center;
  max-width: 360px;
  animation: pop-in 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.level-up-card .section-kicker {
  margin-top: 4px;
}
.level-up-card h2 {
  margin: 0;
  font-size: 1.4rem;
}
.level-up-card p {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}

.level-up-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--neo-yellow);
  color: var(--neo-ink);
  font-weight: 900;
  font-size: 2rem;
  border: 3px solid var(--line);
  box-shadow: 4px 4px 0 var(--line);
}

.level-up-close {
  margin-top: 4px;
}

.confetti-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 100;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes pop-in {
  0% {
    opacity: 0;
    transform: scale(0.7);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
@media (max-width: 1024px) {
  .gamification-dashboard-widget {
    grid-template-columns: 1fr 1fr;
  }
  .achievement-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 600px) {
  #context-gamification {
    flex-wrap: wrap;
    gap: 6px;
  }
  #context-gamification .level-badge-title {
    display: none;
  }
  #context-gamification .xp-bar-container {
    max-width: 100px;
  }
  .gamification-dashboard-widget {
    grid-template-columns: 1fr;
  }
  .achievement-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ─── Game-like FTUE Spotlight Tour ─── */
.ftue-tour-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(10, 10, 10, 0.82);
  transition: opacity 300ms ease;
  pointer-events: auto;
}
.ftue-tour-backdrop.entering {
  opacity: 0;
}
.ftue-tour-backdrop.visible {
  opacity: 1;
}
.ftue-highlighted {
  position: relative;
  z-index: 9001 !important;
  outline: 4px solid var(--neo-pink) !important;
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--neo-pink), 0 0 30px 8px rgba(255, 148, 180, 0.35), var(--shadow) !important;
  border-radius: 8px !important;
  animation: ftue-pulse 2s ease-in-out infinite;
  pointer-events: none;
}
@keyframes ftue-pulse {
  0%, 100% {
    outline-offset: 4px;
    box-shadow: 0 0 0 4px var(--neo-pink), 0 0 30px 8px rgba(255, 148, 180, 0.35), var(--shadow);
  }
  50% {
    outline-offset: 6px;
    box-shadow: 0 0 0 6px var(--neo-pink), 0 0 40px 12px rgba(255, 148, 180, 0.5), var(--shadow);
  }
}
.ftue-tour-tooltip {
  position: fixed;
  z-index: 9002;
  width: min(380px, calc(100vw - 36px));
  padding: 0;
  border: 3px solid var(--neo-ink);
  border-radius: 10px;
  background: var(--neo-paper);
  box-shadow: 6px 6px 0 var(--neo-ink);
  transition: transform 300ms cubic-bezier(0.34, 1.56, 0.64, 1), opacity 250ms ease;
  animation: ftue-tooltip-enter 400ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes ftue-tooltip-enter {
  from { opacity: 0; transform: scale(0.9) translateY(12px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.ftue-tour-tooltip-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px 10px;
  border-bottom: 2px solid var(--neo-ink);
  background: var(--neo-yellow);
  border-radius: 7px 7px 0 0;
}
.ftue-tour-step-badge {
  display: grid;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  place-items: center;
  border: 2px solid var(--neo-ink);
  border-radius: 8px;
  color: var(--neo-ink);
  background: var(--neo-paper);
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 2px 2px 0 var(--neo-ink);
}
.ftue-tour-tooltip-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--neo-ink);
  line-height: 1.25;
}
.ftue-tour-tooltip-body {
  padding: 14px 16px;
}
.ftue-tour-tooltip-body p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--neo-ink);
}
.ftue-tour-tooltip-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 16px 14px;
}
.ftue-tour-dots {
  display: flex;
  gap: 5px;
}
.ftue-tour-dots span {
  width: 18px;
  height: 6px;
  border: 2px solid var(--neo-ink);
  border-radius: 999px;
  background: #ffffff;
  transition: background 200ms ease, width 200ms ease;
}
.ftue-tour-dots span.active {
  width: 28px;
  background: var(--neo-pink);
}
.ftue-tour-dots span.done {
  background: var(--neo-green);
}
.ftue-tour-tooltip-footer .button-row {
  margin-top: 0;
  gap: 6px;
}
.ftue-tour-arrow {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid var(--neo-ink);
  border-right: none;
  border-bottom: none;
  background: var(--neo-yellow);
  transform: rotate(45deg);
  z-index: 9003;
}
.ftue-tour-arrow.arrow-top {
  top: -10px;
  left: 30px;
}
.ftue-tour-arrow.arrow-bottom {
  bottom: -10px;
  left: 30px;
  border: 3px solid var(--neo-ink);
  border-left: none;
  border-top: none;
  background: var(--neo-paper);
}
.ftue-tour-arrow.arrow-left {
  left: -10px;
  top: 20px;
  border: 3px solid var(--neo-ink);
  border-right: none;
  border-top: none;
  background: var(--neo-paper);
}
@media (max-width: 820px) {
  .ftue-tour-tooltip {
    position: fixed !important;
    bottom: 12px !important;
    left: 50% !important;
    top: auto !important;
    right: auto !important;
    transform: translateX(-50%) !important;
    width: calc(100vw - 24px) !important;
    max-width: 460px;
  }
  .ftue-tour-arrow {
    display: none !important;
  }
  .ftue-tour-tooltip-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .ftue-tour-dots {
    justify-content: center;
  }
  .ftue-tour-btn-row {
    display: flex;
    gap: 8px;
  }
  .ftue-tour-btn-row button {
    flex: 1;
    min-width: 0;
    text-align: center;
    white-space: nowrap;
  }
}
.ftue-tour-btn-row {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

/* ─── Interactive Exercise System ─── */
.exercise-practice-layout .practice-card {
  max-width: 100%;
}

/* Progress bar */
.exercise-progress-bar {
  position: relative;
  width: 100%;
  height: 36px;
  border: 3px solid var(--neo-ink);
  border-radius: 8px;
  background: var(--neo-paper);
  overflow: hidden;
  margin: 16px 0;
  box-shadow: 3px 3px 0 var(--neo-ink);
}
.exercise-progress-fill {
  position: absolute;
  inset: 0;
  background: var(--neo-green);
  transition: width 400ms ease;
}
.exercise-progress-bar span {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--neo-ink);
}

/* Exercise card list */
.exercise-card-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0 20px;
}
.exercise-card {
  border: 3px solid var(--neo-ink);
  border-radius: 8px;
  background: var(--neo-paper);
  padding: 12px 16px;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
  box-shadow: 3px 3px 0 var(--neo-ink);
}
.exercise-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--neo-ink);
}
.exercise-card:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--neo-ink);
}
.exercise-card.done {
  border-color: var(--neo-green);
  background: color-mix(in srgb, var(--neo-green) 8%, var(--neo-paper));
}
.exercise-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.exercise-number {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 2px solid var(--neo-ink);
  border-radius: 8px;
  background: var(--neo-yellow);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--neo-ink);
  box-shadow: 2px 2px 0 var(--neo-ink);
  flex-shrink: 0;
}
.exercise-card.done .exercise-number {
  background: var(--neo-green);
}
.exercise-card-header div {
  flex: 1;
  min-width: 0;
}
.exercise-card-header strong {
  display: block;
  font-size: 0.9rem;
  line-height: 1.3;
}
.exercise-card-header small {
  display: block;
  font-size: 0.75rem;
  color: #666;
  margin-top: 2px;
}
.exercise-status {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--neo-ink);
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--neo-paper);
  flex-shrink: 0;
}
.exercise-status.done {
  background: var(--neo-green);
  color: white;
}

/* Completion banner */
.exercise-complete-banner {
  border: 3px solid var(--neo-ink);
  border-radius: 10px;
  padding: 20px;
  margin: 16px 0;
  text-align: center;
  background: var(--neo-yellow);
  box-shadow: 4px 4px 0 var(--neo-ink);
}
.exercise-complete-banner.done {
  background: color-mix(in srgb, var(--neo-green) 15%, var(--neo-paper));
}
.exercise-complete-banner h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}
.exercise-complete-banner p {
  margin: 0 0 12px;
  font-size: 0.85rem;
}

/* ─── Exercise Page (Single Exercise View) ─── */
.exercise-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}
.exercise-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.exercise-step-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--neo-ink);
  opacity: 0.7;
}
.exercise-main-card {
  border: 3px solid var(--neo-ink);
  border-radius: 12px;
  background: var(--neo-paper);
  padding: 24px;
  box-shadow: 6px 6px 0 var(--neo-ink);
  margin-bottom: 20px;
}
.exercise-type-badge {
  display: inline-block;
  padding: 4px 12px;
  border: 2px solid var(--neo-ink);
  border-radius: 6px;
  background: var(--neo-pink);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
  box-shadow: 2px 2px 0 var(--neo-ink);
}
.exercise-main-card h2 {
  font-size: 1.3rem;
  margin: 0 0 8px;
}
.exercise-instruction {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
  color: var(--neo-ink);
}

/* MCQ options */
.exercise-mcq-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.exercise-mcq-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 3px solid var(--neo-ink);
  border-radius: 8px;
  background: var(--neo-paper);
  cursor: pointer;
  text-align: left;
  font-size: 0.88rem;
  line-height: 1.5;
  transition: transform 100ms ease, box-shadow 100ms ease, border-color 150ms;
  box-shadow: 3px 3px 0 var(--neo-ink);
}
.exercise-mcq-option:hover:not(:disabled) {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--neo-ink);
  border-color: var(--neo-blue);
}
.exercise-mcq-option:active:not(:disabled) {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 var(--neo-ink);
}
.exercise-mcq-option.correct {
  border-color: var(--neo-green);
  background: color-mix(in srgb, var(--neo-green) 12%, var(--neo-paper));
}
.exercise-mcq-option.wrong {
  border-color: var(--neo-pink);
  background: color-mix(in srgb, var(--neo-pink) 10%, var(--neo-paper));
  opacity: 0.6;
}
.exercise-option-letter {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 2px solid var(--neo-ink);
  border-radius: 6px;
  background: var(--neo-yellow);
  font-size: 0.8rem;
  font-weight: 800;
  flex-shrink: 0;
}

/* Fill-in-the-blank inputs */
.exercise-blank-input {
  display: inline-block;
  width: 100px;
  padding: 4px 8px;
  border: 2px solid var(--neo-blue);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.95);
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--neo-ink);
  outline: none;
  transition: border-color 200ms, background 200ms;
}
.exercise-blank-input:focus {
  border-color: var(--neo-pink);
  box-shadow: 0 0 0 3px rgba(255, 148, 180, 0.3);
}
.exercise-blank-input.correct {
  border-color: var(--neo-green);
  background: color-mix(in srgb, var(--neo-green) 10%, white);
}
.exercise-blank-input.wrong {
  border-color: var(--neo-pink);
  background: color-mix(in srgb, var(--neo-pink) 10%, white);
}
.exercise-fill-blank-pre {
  overflow-x: auto;
}
.exercise-fill-blank-pre code {
  white-space: pre-wrap;
}

/* Code textarea */
.exercise-textarea-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin: 16px 0 8px;
  color: var(--neo-ink);
}
.exercise-code-textarea {
  display: block;
  width: 100%;
  padding: 16px;
  border: 3px solid var(--neo-ink);
  border-radius: 8px;
  background: #1e1e2e;
  color: #cdd6f4;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  box-shadow: 3px 3px 0 var(--neo-ink);
  tab-size: 4;
}
.exercise-code-textarea:focus {
  border-color: var(--neo-blue);
}
.exercise-code-textarea:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Submit button */
.exercise-submit-btn {
  margin-top: 12px;
}
.exercise-code-area {
  margin-bottom: 16px;
}

/* Hint & Solution panels */
.exercise-hint-panel,
.exercise-solution-panel {
  border: 3px solid var(--neo-ink);
  border-radius: 8px;
  padding: 0;
  margin: 12px 0;
  overflow: hidden;
  box-shadow: 2px 2px 0 var(--neo-ink);
}
.exercise-hint-panel summary,
.exercise-solution-panel summary {
  display: block;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.85rem;
  background: color-mix(in srgb, var(--neo-yellow) 25%, var(--neo-paper));
  border-bottom: 2px solid transparent;
  transition: background 150ms;
}
.exercise-hint-panel[open] summary,
.exercise-solution-panel[open] summary {
  border-bottom-color: var(--neo-ink);
}
.exercise-hint-panel summary:hover,
.exercise-solution-panel summary:hover {
  background: var(--neo-yellow);
}
.exercise-hint-panel ul,
.exercise-solution-panel ul {
  padding: 12px 16px 12px 32px;
  margin: 0;
}
.exercise-hint-panel li,
.exercise-solution-panel li {
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 4px;
}
.exercise-solution-panel .code-panel {
  margin: 12px 16px;
  border-radius: 8px;
}
.exercise-explanation {
  padding: 8px 16px 12px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--neo-ink);
  margin: 0;
}

/* Result banner */
.exercise-result-banner {
  border: 3px solid var(--neo-green);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0 0;
  background: color-mix(in srgb, var(--neo-green) 10%, var(--neo-paper));
  box-shadow: 3px 3px 0 var(--neo-ink);
}
.exercise-result-banner strong {
  font-size: 1rem;
}
.exercise-result-banner p {
  margin: 8px 0 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

/* Bottom navigation */
.exercise-bottom-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 40px;
}

/* Inline feedback */
.exercise-inline-feedback {
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 8px;
  animation: exercise-feedback-in 300ms ease;
}
.exercise-inline-feedback.wrong {
  background: color-mix(in srgb, var(--neo-pink) 15%, var(--neo-paper));
  color: #b91c1c;
  border: 2px solid var(--neo-pink);
}

/* Shake animation */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.shake {
  animation: shake 400ms ease;
}
@keyframes exercise-feedback-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Empty state */
.exercise-empty-state {
  border: 3px dashed var(--neo-ink);
  border-radius: 10px;
  padding: 40px;
  text-align: center;
  opacity: 0.6;
  margin: 20px 0;
}

/* Mobile responsive */
@media (max-width: 820px) {
  .exercise-page {
    padding: 0 8px;
  }
  .exercise-main-card {
    padding: 16px;
    box-shadow: 4px 4px 0 var(--neo-ink);
  }
  .exercise-main-card h2 {
    font-size: 1.1rem;
  }
  .exercise-mcq-option {
    padding: 12px;
    font-size: 0.82rem;
  }
  .exercise-bottom-nav {
    flex-direction: column;
  }
  .exercise-bottom-nav button {
    width: 100%;
  }
  .exercise-blank-input {
    width: 80px;
    font-size: 0.78em;
  }
  .exercise-code-textarea {
    font-size: 0.78rem;
    padding: 12px;
  }
}