:root {
  --bg: #f3efe5;
  --bg-strong: #e7decb;
  --paper: rgba(255, 251, 243, 0.9);
  --paper-strong: rgba(255, 248, 236, 0.98);
  --ink: #1f2f33;
  --muted: #5c6a68;
  --line: rgba(34, 58, 63, 0.14);
  --accent: #0e5a5a;
  --accent-soft: #d7ebe8;
  --accent-strong: #103d4b;
  --gold: #b88433;
  --shadow: 0 18px 55px rgba(20, 31, 32, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --font-display: "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(16, 90, 90, 0.12), transparent 32%),
    radial-gradient(circle at top right, rgba(184, 132, 51, 0.12), transparent 30%),
    linear-gradient(180deg, #f8f5ed 0%, var(--bg) 100%);
  font-family: var(--font-body);
}

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

button,
input,
select {
  font: inherit;
}

.site-shell {
  width: min(1440px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 248, 237, 0.84);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  font-family: var(--font-display);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.8rem;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #f9f4e8;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-nav a,
.action-link,
.text-link,
.text-button,
.toc-link {
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  font-family: var(--font-display);
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-strong);
  background: rgba(14, 90, 90, 0.08);
}

.site-main {
  padding-top: 26px;
}

.reader-mode {
  padding-top: 18px;
}

.hero,
.split-layout,
.reader-grid {
  display: grid;
  gap: 20px;
}

.hero {
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.9fr);
  align-items: stretch;
  margin-bottom: 22px;
}

.hero-copy,
.hero-panel,
.panel,
.boot-screen,
.week-card,
.rail-card,
.reader-article,
.footer-nav-card,
.search-card,
.recent-card,
.guide-card,
.domain-card,
.week-preview {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-panel,
.panel,
.boot-screen,
.reader-article {
  padding: 28px;
}

.hero-copy {
  background:
    linear-gradient(145deg, rgba(255, 250, 240, 0.96), rgba(255, 247, 232, 0.88)),
    var(--paper);
}

.hero h1,
.page-intro h1,
.reader-hero h1,
.boot-screen h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.reader-hero h1 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.lead {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--muted);
}

.hero-actions,
.chip-row,
.level-row,
.button-stack,
.doc-chip-list,
.site-actions,
.reference-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 22px;
}

.button,
.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.95rem;
}

.button-primary,
.action-link {
  color: #f9f4e8;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
}

.button-secondary {
  color: var(--accent-strong);
  background: rgba(255, 248, 236, 0.6);
  border-color: rgba(16, 61, 75, 0.18);
}

.button-wide {
  width: 100%;
}

.button-compact {
  align-self: flex-start;
}

.button:hover,
.action-link:hover,
.text-link:hover,
.text-button:hover,
.toc-link:hover {
  transform: translateY(-1px);
}

.text-link,
.text-button {
  color: var(--accent);
  font-family: var(--font-display);
}

.text-button {
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.eyebrow,
.stat-label,
.meta-line,
.guide-path,
.week-number,
.domain-index,
.helper-line {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-panel {
  display: grid;
  gap: 18px;
  background:
    linear-gradient(160deg, rgba(14, 90, 90, 0.93), rgba(16, 61, 75, 0.95)),
    var(--accent-strong);
  color: #f9f4e8;
}

.hero-panel .eyebrow,
.hero-panel .stat-label {
  color: rgba(249, 244, 232, 0.76);
}

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

.stat-card,
.focus-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 249, 236, 0.08);
  border: 1px solid rgba(255, 244, 220, 0.08);
}

.stat-card strong {
  display: block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: 2rem;
}

.focus-card h2 {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.focus-card p {
  margin: 0 0 16px;
  color: rgba(249, 244, 232, 0.82);
  line-height: 1.7;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.section-header h2,
.panel h1,
.panel h2 {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2vw, 2.2rem);
  letter-spacing: -0.03em;
}

.domain-grid,
.guide-grid,
.week-preview-list,
.recent-list,
.footer-nav-grid {
  display: grid;
  gap: 16px;
}

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

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

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

.domain-card,
.guide-card,
.recent-card,
.search-card,
.week-card,
.week-preview,
.footer-nav-card {
  padding: 22px;
}

.domain-card-header,
.week-card-header,
.rail-stat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.domain-card h3,
.guide-card h3,
.recent-card h3,
.search-card h3,
.footer-nav-card h3,
.week-preview h3,
.week-card h2 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.domain-card p,
.guide-card p,
.recent-card p,
.search-card p,
.footer-nav-card p,
.week-preview p,
.week-card p,
.page-intro p,
.rail-card p,
.resource-link span,
.resource-link strong,
.domain-nav-card p {
  margin: 0;
  line-height: 1.72;
}

.progress-bar {
  height: 8px;
  margin: 18px 0 16px;
  border-radius: 999px;
  background: rgba(16, 61, 75, 0.08);
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--accent));
}

.level-pill,
.status-pill,
.info-chip,
.curriculum-doc {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 0.83rem;
  border: 1px solid rgba(16, 61, 75, 0.12);
  background: rgba(255, 248, 236, 0.72);
}

.level-pill.is-complete,
.status-pill.is-complete {
  color: #0c5b40;
  background: rgba(20, 127, 88, 0.12);
}

.status-pill.is-bookmarked {
  color: #7b4c00;
  background: rgba(184, 132, 51, 0.16);
}

.status-pill.is-open,
.level-pill.is-active {
  color: var(--accent-strong);
  background: rgba(14, 90, 90, 0.12);
}

.split-layout {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 22px 0;
}

.page-intro {
  margin-bottom: 20px;
}

.search-form {
  display: grid;
  grid-template-columns: 2fr repeat(2, minmax(0, 1fr)) auto;
  gap: 12px;
  margin-top: 20px;
}

.search-form label {
  display: grid;
  gap: 8px;
  font-family: var(--font-display);
  color: var(--muted);
}

.search-form input,
.search-form select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(16, 61, 75, 0.14);
  border-radius: 18px;
  background: rgba(255, 252, 246, 0.9);
  color: var(--ink);
}

.search-results,
.week-stack {
  display: grid;
  gap: 16px;
}

.mobile-dock {
  display: none;
}

.reader-grid {
  grid-template-columns: 280px minmax(0, 1fr) 280px;
  align-items: start;
}

.reader-sidebar {
  position: sticky;
  top: 104px;
  display: grid;
  gap: 16px;
}

.rail-card {
  padding: 20px;
}

.domain-nav-list,
.resource-nav-list,
.toc-list,
.path-list,
.reference-list,
.quiz-stack {
  display: grid;
  gap: 12px;
}

.domain-nav-card,
.resource-link,
.reference-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(16, 61, 75, 0.1);
  background: rgba(255, 250, 242, 0.78);
}

.domain-nav-card.active,
.resource-link.active,
.reference-card:hover {
  background: rgba(14, 90, 90, 0.1);
  border-color: rgba(14, 90, 90, 0.18);
}

.domain-nav-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
}

.resource-link strong {
  font-family: var(--font-display);
}

.resource-link span {
  color: var(--muted);
  font-size: 0.92rem;
}

.reader-hero {
  margin-bottom: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.reader-section {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.level-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.level-tab {
  display: grid;
  gap: 4px;
  min-width: 160px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(16, 61, 75, 0.12);
  background: rgba(255, 250, 240, 0.78);
  font-family: var(--font-display);
}

.level-tab small {
  color: var(--muted);
}

.level-tab.is-active {
  background: rgba(14, 90, 90, 0.12);
  border-color: rgba(14, 90, 90, 0.18);
}

.markdown-body {
  font-size: 1.05rem;
  line-height: 1.86;
}

.markdown-body.compact {
  margin-top: 14px;
  font-size: 0.98rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin: 1.8em 0 0.6em;
  font-family: var(--font-display);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.markdown-body h1 {
  font-size: 2rem;
}

.markdown-body h2 {
  font-size: 1.5rem;
}

.markdown-body h3 {
  font-size: 1.2rem;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre {
  margin: 0 0 1.1em;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.4em;
}

.markdown-body li + li {
  margin-top: 0.45em;
}

.markdown-body code {
  padding: 0.12em 0.42em;
  border-radius: 8px;
  background: rgba(14, 90, 90, 0.08);
  font-size: 0.92em;
}

.markdown-body pre {
  overflow: auto;
  padding: 18px;
  border-radius: 20px;
  background: #1d2a2f;
  color: #edf2ef;
}

.markdown-body pre code {
  padding: 0;
  background: transparent;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}

.markdown-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(14, 90, 90, 0.25);
  text-underline-offset: 0.18em;
}

.doc-inline-link {
  display: inline-flex;
  align-items: center;
  padding: 0.14em 0.5em;
  border-radius: 999px;
  background: rgba(14, 90, 90, 0.1);
  color: var(--accent-strong);
  font-family: var(--font-display);
  font-size: 0.9em;
  text-decoration: none !important;
}

.markdown-body blockquote {
  padding: 16px 18px;
  border-left: 3px solid var(--gold);
  border-radius: 0 18px 18px 0;
  background: rgba(184, 132, 51, 0.08);
}

.toc-link {
  justify-content: flex-start;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: var(--ink);
  text-align: left;
}

.toc-link.depth-3 {
  padding-left: 14px;
  color: var(--muted);
}

.path-item {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 251, 243, 0.7);
  border: 1px solid rgba(16, 61, 75, 0.08);
}

.path-item code {
  word-break: break-all;
}

.reference-card strong,
.reference-card span {
  line-height: 1.5;
}

.reference-card span {
  color: var(--muted);
  font-size: 0.92rem;
}

.quiz-card {
  border: 1px solid rgba(16, 61, 75, 0.1);
  border-radius: 22px;
  background: rgba(255, 250, 242, 0.78);
  overflow: hidden;
}

.quiz-card summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
}

.quiz-card summary::-webkit-details-marker {
  display: none;
}

.quiz-index {
  display: inline-grid;
  place-items: center;
  min-width: 42px;
  height: 42px;
  border-radius: 14px;
  background: rgba(14, 90, 90, 0.12);
  color: var(--accent-strong);
  font-weight: 700;
}

.quiz-answer {
  padding: 0 20px 18px;
}

.quiz-answer ul {
  margin: 12px 0 0;
  padding-left: 1.2em;
}

.footer-nav {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

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

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

.week-columns h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
}

.week-columns ul {
  margin: 0;
  padding-left: 1.2em;
}

.week-details {
  margin-top: 18px;
}

.week-details summary {
  cursor: pointer;
  font-family: var(--font-display);
  color: var(--accent);
}

.empty-state {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 249, 238, 0.84);
  border: 1px dashed rgba(16, 61, 75, 0.16);
}

.empty-state h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
}

.boot-screen {
  width: min(720px, calc(100vw - 40px));
  margin: 12vh auto 0;
  text-align: center;
}

.boot-screen p {
  max-width: 42ch;
  margin: 14px auto 0;
  color: var(--muted);
}

@media (max-width: 1180px) {
  .reader-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .reader-sidebar {
    position: static;
    order: 2;
  }

  .left-rail .domain-nav-list,
  .left-rail .resource-nav-list,
  .right-rail .reference-list,
  .right-rail .path-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(240px, 74vw);
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .reader-article {
    order: 1;
  }
}

@media (max-width: 980px) {
  .hero,
  .split-layout,
  .domain-grid,
  .guide-grid,
  .week-preview-list,
  .footer-nav-grid,
  .week-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .search-form {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-header {
    position: static;
    flex-direction: column;
    align-items: stretch;
    border-radius: 28px;
  }

  .site-nav {
    justify-content: space-between;
  }

  .mobile-dock {
    position: fixed;
    right: 12px;
    bottom: 12px;
    left: 12px;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    padding: 10px;
    border: 1px solid rgba(16, 61, 75, 0.12);
    border-radius: 24px;
    background: rgba(255, 248, 237, 0.92);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
  }

  .mobile-dock a {
    display: grid;
    gap: 2px;
    padding: 10px 8px;
    border-radius: 16px;
    text-align: center;
    font-family: var(--font-display);
    font-size: 0.82rem;
    color: var(--muted);
  }

  .mobile-dock a.active {
    background: rgba(14, 90, 90, 0.1);
    color: var(--accent-strong);
  }

  .mobile-dock span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.72rem;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 14px;
    padding-bottom: 92px;
  }

  .hero-copy,
  .hero-panel,
  .panel,
  .reader-article,
  .rail-card {
    padding: 20px;
  }

  .site-nav {
    flex-wrap: wrap;
  }

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

  .level-tabs,
  .chip-row,
  .button-stack,
  .site-actions {
    flex-direction: column;
  }

  .button,
  .action-link {
    width: 100%;
  }

  .reference-grid {
    flex-direction: column;
  }

  .quiz-card summary {
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}