:root {
  --ink: #10233f;
  --muted: #55667e;
  --paper: #f8f2e8;
  --panel: rgba(255, 250, 242, 0.88);
  --panel-strong: rgba(255, 253, 247, 0.96);
  --line: rgba(16, 35, 63, 0.12);
  --accent: #d2693c;
  --accent-deep: #8c3f20;
  --accent-soft: rgba(210, 105, 60, 0.12);
  --sage: #6b8a73;
  --gold: #cf9d3b;
  --shadow: 0 24px 60px rgba(16, 35, 63, 0.14);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Trebuchet MS", "Gill Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(207, 157, 59, 0.22), transparent 24%),
    radial-gradient(circle at bottom right, rgba(107, 138, 115, 0.18), transparent 28%),
    linear-gradient(140deg, #fbf6ec 0%, #eee0ca 48%, #f7f1e7 100%);
}

body.has-modal-open {
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 35, 63, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 35, 63, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 82%);
}

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
}

p {
  margin: 0;
}

.site-shell {
  width: min(1240px, calc(100% - 28px));
  margin: 0 auto;
  padding: 20px 0 44px;
}

.page-shell {
  display: grid;
  gap: 22px;
}

.site-nav,
.panel,
.hero-copy,
.hero-aside,
.page-hero,
.stat-card,
.module-card,
.lesson-tile,
.info-card,
.roadmap-card {
  background: var(--panel);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 20px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent) 0%, #e28c56 100%);
  color: #fff8ef;
  font-family: Georgia, "Times New Roman", serif;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-left: auto;
}

.nav-links a {
  padding: 10px 14px;
  text-decoration: none;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 700;
}

.nav-reset-button {
  min-height: 42px;
  padding: 0 16px;
  white-space: nowrap;
}

.app-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}

.app-modal.is-open {
  display: flex;
}

.app-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 35, 63, 0.42);
  backdrop-filter: blur(8px);
}

.app-modal-dialog {
  position: relative;
  width: min(100%, 520px);
}

.app-modal-content {
  position: relative;
  display: grid;
  gap: 14px;
  padding: 28px;
  border-radius: var(--radius-xl);
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow: var(--shadow);
}

.app-modal-copy {
  color: var(--muted);
  line-height: 1.7;
}

.app-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 6px;
}

body[data-page="home"] .nav-links a[href="index.html"],
body[data-page="curriculum"] .nav-links a[href="curriculum.html"],
body[data-page="lesson"] .nav-links a[href="curriculum.html"],
body[data-page="quiz"] .nav-links a[href="curriculum.html"],
body[data-page="roadmap"] .nav-links a[href="roadmap.html"] {
  background: rgba(16, 35, 63, 0.08);
  color: var(--ink);
}

.eyebrow {
  margin-bottom: 8px;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.hero-block,
.lesson-layout,
.quiz-layout {
  display: grid;
  gap: 22px;
}

.hero-block {
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.85fr);
}

.hero-copy,
.hero-aside,
.page-hero,
.lesson-hero,
.quiz-hero {
  padding: 34px;
  border-radius: var(--radius-xl);
}

.hero-copy {
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -42px;
  top: -30px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(210, 105, 60, 0.24), transparent 68%);
}

.hero-copy h1,
.page-hero h1 {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  line-height: 0.98;
  margin-bottom: 16px;
}

.hero-aside h2 {
  margin-bottom: 14px;
  font-size: 1.7rem;
}

.hero-text,
.module-description,
.lesson-summary,
.story-note,
.story-text,
.lesson-note,
.meta-line,
.question-explanation,
.quiz-note,
.progress-copy,
.roadmap-copy,
.info-card p,
.summary-card p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions,
.card-actions,
.lesson-actions,
.quiz-controls,
.pager {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.button:hover,
.button:focus-visible,
.option-button:hover,
.option-button:focus-visible,
.chip-link:hover,
.chip-link:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #e28b54 100%);
  color: #fff8f1;
}

.button-secondary {
  background: rgba(255, 255, 255, 0.45);
  border-color: rgba(16, 35, 63, 0.16);
  color: var(--ink);
}

.feature-list,
.bullet-list,
.story-list,
.roadmap-card ul,
.lesson-sidebar ul {
  margin: 0;
  padding-left: 20px;
}

.feature-list li,
.bullet-list li,
.story-list li,
.roadmap-card li,
.lesson-sidebar li {
  margin-bottom: 10px;
  line-height: 1.6;
}

.stats-grid,
.card-grid,
.roadmap-grid {
  display: grid;
  gap: 18px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.trio-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card,
.module-card,
.lesson-tile,
.info-card,
.roadmap-card,
.question-card,
.story-card,
.summary-card,
.progress-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.stat-card {
  min-height: 118px;
}

.stat-label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.stat-value {
  font-size: 2.1rem;
}

.panel {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.section-heading {
  margin-bottom: 18px;
}

.module-stack,
.lesson-main,
.roadmap-grid {
  display: grid;
  gap: 18px;
}

.module-card {
  padding: 24px;
}

.module-topline,
.lesson-topline,
.quiz-topline,
.story-topline,
.summary-topline,
.question-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.module-meta,
.lesson-meta,
.quiz-metrics,
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip,
.chip-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(16, 35, 63, 0.06);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.chip-link {
  border: 1px solid rgba(16, 35, 63, 0.12);
}

.lesson-tile {
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid var(--line);
}

.lesson-tile .card-actions {
  margin-top: 16px;
}

.lesson-layout {
  grid-template-columns: minmax(270px, 0.72fr) minmax(0, 1.45fr);
  align-items: start;
}

.lesson-sidebar,
.quiz-sidebar {
  position: sticky;
  top: 18px;
}

.lesson-main,
.quiz-main {
  display: grid;
  gap: 18px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--accent-deep);
  text-decoration: none;
}

.summary-card,
.story-card,
.question-card,
.progress-card {
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--line);
}

.story-block {
  display: grid;
  gap: 16px;
}

.story-text {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05rem;
}

.story-divider {
  height: 1px;
  background: linear-gradient(90deg, rgba(16, 35, 63, 0.14), transparent);
}

.lesson-actions {
  margin-top: 8px;
}

.portfolio-panel {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.lesson-sidebar h3,
.quiz-sidebar h3,
.question-card h3,
.summary-card h3,
.story-card h3,
.roadmap-card h3,
.info-card h3 {
  margin-bottom: 12px;
}

.quiz-layout {
  grid-template-columns: minmax(270px, 0.72fr) minmax(0, 1.45fr);
  align-items: start;
}

.quiz-progress {
  display: grid;
  gap: 14px;
}

.progress-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.question-card {
  display: grid;
  gap: 14px;
}

.option-list {
  display: grid;
  gap: 10px;
}

.option-button {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fffdf8;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.option-button.is-selected {
  border-color: rgba(210, 105, 60, 0.5);
  background: rgba(240, 201, 181, 0.34);
}

.option-button.is-correct {
  border-color: rgba(107, 138, 115, 0.44);
  background: rgba(107, 138, 115, 0.18);
}

.option-button.is-incorrect {
  border-color: rgba(210, 105, 60, 0.44);
  background: rgba(210, 105, 60, 0.14);
}

.question-explanation {
  padding: 14px;
  border-radius: 14px;
  background: rgba(16, 35, 63, 0.06);
}

.contrast-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.contrast-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  display: grid;
  gap: 12px;
}

.contrast-card h4 {
  font-size: 1.1rem;
}

.contrast-example {
  padding: 12px 14px;
  border-radius: 14px;
  line-height: 1.6;
}

.contrast-example-good {
  background: rgba(107, 138, 115, 0.12);
  border: 1px solid rgba(107, 138, 115, 0.3);
}

.contrast-example-bad {
  background: rgba(210, 105, 60, 0.1);
  border: 1px solid rgba(210, 105, 60, 0.24);
}

.quiz-controls {
  justify-content: space-between;
}

.quiz-results {
  margin-top: 12px;
}

.results-card {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(107, 138, 115, 0.18), rgba(207, 157, 59, 0.18));
  border: 1px solid rgba(16, 35, 63, 0.1);
}

.context-prompts {
  margin-top: 16px;
}

.roadmap-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.spotlight-panel {
  padding: 30px;
}

.empty-state {
  text-align: center;
  padding: 48px 24px;
}

@media (max-width: 1080px) {
  .hero-block,
  .lesson-layout,
  .quiz-layout,
  .stats-grid,
  .trio-grid,
  .card-grid,
  .contrast-grid,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .lesson-sidebar,
  .quiz-sidebar {
    position: static;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 18px, 1240px);
    padding-top: 14px;
  }

  .site-nav,
  .hero-copy,
  .hero-aside,
  .page-hero,
  .lesson-hero,
  .quiz-hero,
  .panel,
  .module-card,
  .lesson-tile,
  .summary-card,
  .story-card,
  .question-card,
  .progress-card,
  .info-card,
  .roadmap-card,
  .stat-card {
    padding: 18px;
  }

  .site-nav {
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-actions {
    width: 100%;
    margin-left: 0;
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: 2.4rem;
  }

  .hero-actions,
  .card-actions,
  .lesson-actions,
  .quiz-controls,
  .app-modal-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .app-modal-content {
    padding: 20px;
  }
}