@import url("https://fonts.googleapis.com/css2?family=Fraunces:wght@500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap");

:root {
  --bg: #f5efe3;
  --bg-strong: #fff9ef;
  --surface: rgba(255, 250, 242, 0.84);
  --surface-strong: #fffdf8;
  --surface-inverse: #132326;
  --text: #1e2422;
  --text-soft: #4d5b58;
  --line: rgba(22, 49, 50, 0.12);
  --line-strong: rgba(22, 49, 50, 0.24);
  --accent: #0f766e;
  --accent-soft: rgba(15, 118, 110, 0.1);
  --accent-strong: #0b4f52;
  --gold: #b7791f;
  --gold-soft: rgba(183, 121, 31, 0.1);
  --shadow: 0 24px 60px rgba(16, 38, 40, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

:root[data-theme="dark"] {
  --bg: #0d1416;
  --bg-strong: #101b1e;
  --surface: rgba(19, 35, 38, 0.88);
  --surface-strong: #152326;
  --surface-inverse: #edf5f3;
  --text: #edf5f3;
  --text-soft: #b7cbc8;
  --line: rgba(214, 235, 231, 0.1);
  --line-strong: rgba(214, 235, 231, 0.2);
  --accent: #5dd3c8;
  --accent-soft: rgba(93, 211, 200, 0.12);
  --accent-strong: #8de8df;
  --gold: #f0b15d;
  --gold-soft: rgba(240, 177, 93, 0.12);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(183, 121, 31, 0.18), transparent 24%),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.16), transparent 28%),
    linear-gradient(180deg, var(--bg-strong), var(--bg));
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-shell {
  width: min(1400px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 48px;
}

body[data-page="chapter"] .site-shell {
  padding-top: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  position: sticky;
  top: 14px;
  z-index: 30;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius-xl) + 4px);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

body[data-page="chapter"] .topbar {
  position: static;
  top: auto;
}

.brand {
  display: grid;
  gap: 2px;
}

.brand__eyebrow,
.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 800;
}

.brand__title,
h1,
h2,
h3 {
  font-family: "Fraunces", serif;
  letter-spacing: -0.03em;
}

.brand__title {
  font-size: 1.35rem;
  font-weight: 700;
}

.brand__meta {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.topbar__actions,
.question-actions,
.stack-actions,
.resource-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px;
}

.page {
  margin-top: 28px;
}

.page--home {
  display: grid;
  gap: 28px;
}

.hero,
.resource-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.hero__content,
.hero__panel,
.resource-hero,
.panel,
.chapter-hero-card,
.subject-card,
.mini-card,
.definition-card,
.callout,
.flow-card,
.revision-box,
.question-card,
.toast {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero__content,
.hero__panel,
.resource-hero,
.chapter-hero-card {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.hero h1,
.resource-hero h1,
.chapter-hero-card h1 {
  margin: 10px 0 12px;
  font-size: clamp(2.4rem, 4vw, 4.6rem);
  line-height: 0.96;
}

.hero__lead,
.chapter-hero-card__lead,
.section-heading__copy,
.hero__panel p,
.resource-hero p {
  color: var(--text-soft);
  line-height: 1.7;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.stat-card {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface-strong) 84%, transparent);
  border: 1px solid var(--line);
}

.stat-card__value {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}

.stat-card__label {
  color: var(--text-soft);
}

.check-list,
.clean-list,
.ordered-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.section-block {
  display: grid;
  gap: 18px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
}

.section-heading h2 {
  margin: 8px 0 0;
  font-size: clamp(1.6rem, 2vw, 2.5rem);
}

.section-heading__copy {
  max-width: 560px;
}

.subject-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.subject-card,
.mini-card,
.definition-card,
.question-card,
.panel,
.resource-hero,
.flow-card,
.revision-box,
.visual-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.subject-card {
  display: grid;
  gap: 16px;
}

.subject-card--live {
  background:
    linear-gradient(140deg, color-mix(in srgb, var(--surface) 82%, transparent), color-mix(in srgb, var(--accent-soft) 60%, transparent));
}

.subject-card__header,
.question-chip-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
}

.pill--muted {
  background: var(--gold-soft);
  color: var(--gold);
}

.subject-card__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.subject-card__links a,
.secondary-button,
.primary-button,
.ghost-button {
  border-radius: 999px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.primary-button {
  background: var(--surface-inverse);
  color: var(--bg-strong);
  border-color: transparent;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.secondary-button,
.ghost-button,
.subject-card__links a {
  background: color-mix(in srgb, var(--surface-strong) 92%, transparent);
  color: var(--text);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.subject-card__links a:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.subject-card__coming {
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--text-soft);
}

.subject-card__coming a {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.subject-card__coming a:hover {
  color: var(--accent);
}

.chapter-layout {
  display: grid;
  grid-template-columns: minmax(260px, 280px) minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.chapter-sidebar {
  position: static;
  align-self: start;
  display: grid;
  grid-template-rows: auto;
  gap: 14px;
  height: auto;
}

.chapter-sidebar .panel {
  min-height: auto;
  overflow: visible;
}

.panel--sticky {
  max-height: none;
  overflow: visible;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.chapter-nav {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.chapter-nav__link {
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-soft);
}

.chapter-nav__link.is-active,
.chapter-nav__link:hover {
  color: var(--text);
  background: var(--accent-soft);
}

.chapter-main {
  display: grid;
  gap: 20px;
}

.chapter-section {
  padding: 26px;
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.anchor-target {
  display: block;
  position: relative;
  top: -96px;
  visibility: hidden;
}

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

.definition-card--accent {
  background: color-mix(in srgb, var(--accent-soft) 65%, var(--surface));
}

.content-block {
  margin-top: 18px;
}

.subtopic-stack {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.subtopic-card {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--surface-strong) 92%, transparent);
  border: 1px solid var(--line);
}

.subtopic-copy {
  display: grid;
  gap: 12px;
}

.content-block h3,
.mini-card h3,
.definition-card h3,
.subtopic-card h3,
.callout strong,
.revision-box h3,
.flow-card h3,
.question-card strong,
.question-card h3,
.answer-hero h1 {
  margin: 0 0 10px;
}

.content-block p,
.mini-card p,
.definition-card p,
.subtopic-card p,
.callout p,
.question-card p,
.search-result p,
.answer-copy p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.callout-stack {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.visual-card {
  display: grid;
  gap: 16px;
  background: color-mix(in srgb, var(--surface-strong) 92%, transparent);
  border: 1px solid var(--line);
}

.visual-card img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--bg-strong) 84%, transparent);
  border: 1px solid var(--line);
  padding: 12px;
}

.visual-card__body {
  display: grid;
  gap: 12px;
}

.callout {
  margin-top: 18px;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.callout--dashed,
.revision-box {
  border: 1.5px dashed var(--line-strong);
}

.callout--exam {
  border-left-color: var(--gold);
  background: color-mix(in srgb, var(--gold-soft) 62%, transparent);
}

.timeline {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.timeline__item {
  position: relative;
  padding: 0 0 0 24px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
}

.flow-card,
.revision-box {
  margin-top: 20px;
}

.flow-steps {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--text-soft);
}

.flow-steps span {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--surface-strong) 90%, transparent);
  color: var(--text);
  font-weight: 700;
}

.table-wrap {
  margin-top: 18px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  background: color-mix(in srgb, var(--accent-soft) 56%, transparent);
}

.question-sidebar__list,
.question-result-list {
  display: grid;
  gap: 14px;
}

.panel__header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 14px;
}

.question-card {
  padding: 18px;
  display: grid;
  gap: 12px;
}

.question-card__meta {
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
}

.question-card__details {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.question-card__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line);
}

.question-card--link {
  padding: 22px;
}

.question-card--link h3 {
  font-size: 1.12rem;
  line-height: 1.45;
}

.answer-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.8fr);
  gap: 24px;
  align-items: start;
  padding: 28px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.answer-copy {
  display: grid;
  gap: 14px;
}

.mc-layout {
  align-items: start;
}

.mc-sidebar .panel {
  display: grid;
  gap: 16px;
}

.mc-toc {
  max-height: 58vh;
  overflow: auto;
  padding-right: 4px;
}

.mc-toc .chapter-nav__link {
  line-height: 1.45;
}

.mc-question {
  scroll-margin-top: 110px;
}

.mc-question__body {
  display: grid;
  gap: 14px;
}

.mc-question__body h3,
.mc-question__body h4,
.mc-question__body h5 {
  margin: 8px 0 0;
}

.mc-question__body ul,
.mc-question__body ol,
.mc-question__body .table-wrap,
.mc-question__body .callout {
  margin-top: 0;
}

.mc-diagram {
  text-align: center;
}

.mc-set-nav {
  justify-content: space-between;
}

.field {
  display: grid;
  gap: 8px;
  min-width: 180px;
}

.field input,
.field select,
.search-input input {
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 92%, transparent);
  color: var(--text);
  padding: 12px 14px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.topbar--landing {
  gap: 18px;
}

.topbar__nav,
.footer__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.topbar__nav a,
.footer__actions a {
  color: var(--text-soft);
  font-weight: 700;
}

.topbar__nav a:hover,
.footer__actions a:hover {
  color: var(--accent);
}

.page--survival-kit,
.page--coming-soon {
  display: grid;
  gap: 28px;
}

.landing-hero,
.coming-soon-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 24px;
  align-items: center;
}

.landing-hero__content,
.landing-hero__visual,
.coming-soon-hero__content,
.scope-card,
.support-card,
.university-card,
.trimester-card,
.testimonial-card,
.college-card,
.future-card,
.team-card,
.capability-panel,
.ribbon-stat,
.footer {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.landing-hero__content,
.landing-hero__visual,
.coming-soon-hero__content,
.coming-soon-hero .hero__panel,
.footer {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.landing-hero h1,
.coming-soon-hero h1 {
  margin: 12px 0 14px;
  font-size: clamp(2.8rem, 4.6vw, 5.5rem);
  line-height: 0.94;
}

.landing-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

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

.landing-hero__visual {
  position: relative;
  overflow: hidden;
  min-height: 100%;
  transform: translateY(calc(var(--parallax-offset, 0px) * -1));
}

.landing-hero__visual img {
  width: 100%;
  display: block;
  border-radius: calc(var(--radius-xl) - 6px);
}

.floating-note {
  position: absolute;
  max-width: 220px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(22, 49, 50, 0.09);
  box-shadow: 0 18px 36px rgba(16, 38, 40, 0.12);
}

.floating-note strong,
.ribbon-stat strong,
.team-card span,
.college-card span {
  display: block;
}

.floating-note span {
  color: var(--text-soft);
  line-height: 1.55;
}

.floating-note--top {
  top: 26px;
  right: 24px;
}

.floating-note--bottom {
  left: 24px;
  bottom: 26px;
}

.kit-pillars,
.university-grid,
.trimester-grid,
.testimonial-grid,
.college-grid,
.future-grid,
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.support-card,
.university-card,
.trimester-card,
.testimonial-card,
.college-card,
.future-card,
.team-card,
.capability-panel,
.scope-card {
  border-radius: var(--radius-lg);
  padding: 24px;
}

.support-card,
.team-card,
.capability-panel,
.scope-card,
.testimonial-card,
.future-card,
.college-card {
  display: grid;
  gap: 14px;
}

.support-card__icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: var(--accent-soft);
  font-size: 1.45rem;
}

.capability-layout,
.scope-grid,
.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.capability-panel--accent,
.scope-card--active,
.college-card--active,
.trimester-card--active,
.university-card--active {
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--surface) 80%, transparent), color-mix(in srgb, var(--accent-soft) 82%, transparent));
}

.university-card,
.trimester-card {
  display: grid;
  gap: 16px;
  color: inherit;
}

.trimester-card h3,
.university-card h3,
.support-card h3,
.scope-card h3,
.team-card h3,
.testimonial-card strong,
.future-card h3,
.college-card h3,
.capability-panel h3 {
  margin: 0;
}

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

.ribbon-stat {
  border-radius: var(--radius-lg);
  padding: 22px;
  text-align: center;
}

.ribbon-stat strong {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 6px;
}

.ribbon-stat span,
.team-card p,
.future-card p,
.college-card p,
.support-card p,
.testimonial-card p,
.scope-card p,
.capability-panel li,
.university-card p,
.trimester-card p,
.footer p {
  color: var(--text-soft);
  line-height: 1.7;
  margin: 0;
}

.testimonial-card p {
  font-size: 1.02rem;
}

.team-card__avatar {
  width: 58px;
  height: 58px;
  border-radius: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 800;
}

.team-card span {
  color: var(--accent);
  font-weight: 800;
  margin-top: -8px;
}

.breadcrumbs--standalone {
  margin-bottom: 0;
}

.breadcrumbs--inline {
  margin-bottom: 4px;
}

.footer {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.footer strong {
  font-family: "Fraunces", serif;
  font-size: 1.1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 480ms ease, transform 480ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.ordered-list {
  padding-left: 20px;
}

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.search-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 10, 12, 0.54);
  backdrop-filter: blur(8px);
}

.search-modal__panel {
  position: relative;
  width: min(820px, calc(100% - 24px));
  margin: 8vh auto 0;
  border-radius: var(--radius-xl);
  background: var(--surface-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 22px;
}

.search-modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.icon-button {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
}

.search-input {
  display: grid;
  gap: 8px;
}

.search-results {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.search-result {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
}

.search-result span,
.empty-state {
  color: var(--text-soft);
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  border-radius: 999px;
  padding: 12px 18px;
}

@media (max-width: 1120px) {
  .chapter-layout {
    grid-template-columns: 1fr;
  }

  .chapter-sidebar {
    position: static;
    height: auto;
    grid-template-rows: auto;
  }

  .chapter-sidebar .panel,
  .panel--sticky {
    max-height: none;
    overflow: visible;
  }
}

@media (max-width: 860px) {
  .site-shell {
    width: min(100% - 18px, 1400px);
  }

  .topbar,
  .section-heading,
  .hero,
  .landing-hero,
  .coming-soon-hero,
  .resource-hero,
  .answer-hero {
    grid-template-columns: 1fr;
    display: grid;
  }

  .topbar {
    position: static;
  }

  .hero__stats,
  .hero__stats--landing,
  .definition-grid,
  .capability-layout,
  .scope-grid,
  .stats-ribbon,
  .footer {
    grid-template-columns: 1fr;
  }

  .footer {
    display: grid;
  }

  .chapter-section,
  .hero__content,
  .hero__panel,
  .landing-hero__content,
  .landing-hero__visual,
  .coming-soon-hero__content,
  .resource-hero,
  .chapter-hero-card {
    padding: 22px;
  }

  .topbar__nav {
    display: none;
  }

  .floating-note {
    position: static;
    max-width: none;
    margin-top: 14px;
  }
}

@media print {
  body {
    background: #fff;
  }

  .topbar,
  .chapter-sidebar,
  .search-modal,
  .ghost-button,
  .primary-button,
  .secondary-button,
  .toast {
    display: none !important;
  }

  .site-shell {
    width: 100%;
    padding: 0;
  }

  .chapter-layout {
    grid-template-columns: 1fr;
  }

  .chapter-section,
  .chapter-hero-card {
    box-shadow: none;
    border: 1px solid #ccc;
    background: #fff;
  }
}