:root {
  color-scheme: dark;

  --bg: #050505;
  --bg-elevated: #0a0a0b;
  --bg-surface: #0f1012;
  --bg-soft: #111319;

  --line: #26282e;
  --line-soft: #1b1d23;
  --line-strong: #3b82f6;

  --text: #f5f7fa;
  --text-soft: #d4d9e3;
  --text-muted: #99a2b2;

  --accent: #60a5fa;
  --accent-solid: #2563eb;
  --accent-soft: rgba(96, 165, 250, 0.14);

  --radius-xl: 16px;
  --radius-l: 12px;
  --radius-m: 10px;

  --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.36);

  --container: min(1320px, calc(100% - 2rem));
}

:root[data-theme="light"] {
  color-scheme: light;

  --bg: #f3f5f8;
  --bg-elevated: #ffffff;
  --bg-surface: #f7f9fc;
  --bg-soft: #eef2f8;

  --line: #d8dce6;
  --line-soft: #e7ebf2;
  --line-strong: #2563eb;

  --text: #0f172a;
  --text-soft: #1e293b;
  --text-muted: #5b6578;

  --accent: #2563eb;
  --accent-solid: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.12);

  --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.12);
  --shadow-md: 0 5px 16px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Geist Sans", "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text-soft);
  background: radial-gradient(circle at 8% 0%, rgba(37, 99, 235, 0.18), transparent 36%),
    radial-gradient(circle at 92% 12%, rgba(96, 165, 250, 0.14), transparent 34%),
    var(--bg);
  line-height: 1.58;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root[data-theme="light"] body {
  background: radial-gradient(circle at 8% 0%, rgba(37, 99, 235, 0.1), transparent 40%),
    radial-gradient(circle at 92% 12%, rgba(125, 163, 255, 0.1), transparent 38%),
    var(--bg);
}

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

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.zc-app {
  min-height: 100vh;
  position: relative;
}

.zc-app::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 50% 30%, black 34%, transparent 78%);
  opacity: 0.45;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: var(--container);
  margin: 0 auto;
  min-height: 66px;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.brand {
  color: var(--text);
  font-size: 1rem;
  letter-spacing: 0.01em;
  font-weight: 600;
  margin-right: 1rem;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.top-nav a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: color 140ms ease;
}

.top-nav a:hover {
  color: var(--text);
}

.controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.48rem;
}

.segmented {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px;
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent 12%);
}

.segmented button {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.28rem 0.58rem;
}

.segmented button.active {
  color: var(--text);
  background: color-mix(in srgb, var(--accent-soft) 85%, transparent);
}

.palette-trigger {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-soft) 90%, transparent);
  color: var(--text-muted);
  min-width: 48px;
  min-height: 32px;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  font-size: 0.72rem;
}

main {
  width: var(--container);
  margin: 0 auto;
  padding: 1.9rem 0 2.5rem;
}

.hero {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(165deg, var(--bg-surface), color-mix(in srgb, var(--bg-elevated) 90%, #000 10%));
  box-shadow: var(--shadow-lg);
}

.hero-inner {
  padding: clamp(1.2rem, 2.4vw, 2.2rem);
}

.hero-layout {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1.38fr) minmax(320px, 0.92fr);
  align-items: start;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.hero h1 {
  margin: 0.7rem 0 0.9rem;
  color: var(--text);
  max-width: 18ch;
  font-size: clamp(1.8rem, 3.1vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  color: var(--text-soft);
  max-width: 64ch;
}

.lead.muted {
  margin-top: 0.24rem;
  color: var(--text-muted);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.62rem;
  margin-top: 1.05rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  min-height: 40px;
  padding: 0 0.92rem;
  font-size: 0.9rem;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease;
}

.btn.primary {
  border-color: color-mix(in srgb, var(--accent-solid) 80%, #0b1220 20%);
  background: linear-gradient(120deg, var(--accent-solid), #1f5af0);
  color: #fff;
}

.btn.ghost {
  background: color-mix(in srgb, var(--bg-soft) 92%, transparent 8%);
  color: var(--text-soft);
}

.btn:hover {
  border-color: var(--line-strong);
}

.notice {
  margin: 1rem 0 0;
  color: var(--text-muted);
  max-width: 72ch;
  font-size: 0.9rem;
}

.hero-terminal {
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: color-mix(in srgb, var(--bg) 84%, transparent 16%);
  overflow: hidden;
}

.hero-terminal header {
  padding: 0.82rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent 12%);
}

.hero-terminal h2 {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
}

.hero-terminal p {
  margin: 0.2rem 0 0;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.hero-terminal ul {
  list-style: none;
  margin: 0;
  padding: 0.35rem 0.5rem 0.5rem;
}

.hero-terminal li {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.58rem;
  display: grid;
  gap: 0.3rem;
}

.hero-terminal li + li {
  margin-top: 0.26rem;
}

.hero-terminal li:hover {
  border-color: var(--line);
  background: color-mix(in srgb, var(--accent-soft) 44%, transparent);
}

.hero-terminal code {
  color: var(--text);
  font-size: 0.78rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.hero-terminal span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.metrics {
  margin-top: 1rem;
  display: grid;
  gap: 0.56rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: color-mix(in srgb, var(--bg-soft) 84%, transparent);
  padding: 0.72rem 0.76rem;
}

.metric-label {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.metric-value {
  margin: 0.24rem 0 0;
  color: var(--text);
  font-size: 1.08rem;
  font-weight: 600;
}

.principles {
  margin-top: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 0.92rem;
}

.principles > h2 {
  margin: 0;
  color: var(--text);
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.principles-grid {
  margin-top: 0.64rem;
  display: grid;
  gap: 0.56rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principle-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: color-mix(in srgb, var(--bg-soft) 75%, transparent);
  padding: 0.72rem;
}

.principle-card h3 {
  margin: 0;
  color: var(--text);
  font-size: 0.92rem;
}

.principle-card p {
  margin: 0.36rem 0 0;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.docs-shell {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--bg-surface) 94%, transparent);
  box-shadow: var(--shadow-lg);
  padding: 1rem;
}

.docs-head h2 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.18rem, 1.8vw, 1.5rem);
  letter-spacing: -0.01em;
}

.docs-head p {
  margin: 0.36rem 0 0;
  color: var(--text-muted);
  max-width: 86ch;
}

.workspace-meta {
  margin-top: 0.72rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.48rem;
}

.workspace-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.68rem;
  font-size: 0.76rem;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--bg-soft) 76%, transparent);
}

.workspace-meta strong {
  color: var(--text);
  font-weight: 600;
}

.pathway-shell {
  margin-top: 0.72rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: color-mix(in srgb, var(--bg-soft) 80%, transparent);
  padding: 0.68rem;
}

.pathway-head h3 {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
}

.pathway-head p {
  margin: 0.3rem 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.pathway-grid {
  margin-top: 0.6rem;
  display: grid;
  gap: 0.48rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pathway-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  color: var(--text-soft);
  text-align: left;
  display: grid;
  gap: 0.24rem;
  padding: 0.56rem 0.62rem;
  transition: border-color 150ms ease, background-color 150ms ease;
}

.pathway-card:hover {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 54%, transparent);
}

.pathway-card.active {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 72%, transparent);
}

.pathway-title {
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 600;
}

.pathway-detail {
  color: var(--text-muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.pathway-count {
  justify-self: start;
  border: 1px solid var(--line);
  border-radius: 999px;
  min-width: 28px;
  min-height: 22px;
  padding: 0 0.46rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: var(--accent);
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.starter-shell {
  margin-top: 0.72rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: color-mix(in srgb, var(--bg-soft) 84%, transparent);
  padding: 0.68rem;
}

.starter-head h3 {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
}

.starter-head p {
  margin: 0.3rem 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.starter-list {
  margin-top: 0.55rem;
  display: grid;
  gap: 0.4rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.starter-item {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--bg-elevated) 90%, transparent);
  color: var(--text-soft);
  text-align: left;
  display: grid;
  gap: 0.22rem;
  padding: 0.5rem 0.56rem;
  transition: border-color 150ms ease, background-color 150ms ease;
}

.starter-item:hover {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 56%, transparent);
}

.starter-item.active {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 72%, transparent);
}

.starter-title {
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
}

.starter-meta {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.docs-toolbar {
  margin-top: 0.72rem;
  display: grid;
  gap: 0.56rem;
  grid-template-columns:
    minmax(220px, 1.4fr)
    repeat(6, minmax(128px, 0.75fr))
    minmax(120px, auto)
    minmax(120px, auto);
}

.docs-toolbar input,
.docs-toolbar select {
  min-width: 0;
  min-height: 42px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  color: var(--text);
  padding: 0 0.85rem;
}

.docs-toolbar input::placeholder {
  color: var(--text-muted);
}

.docs-toolbar .btn {
  min-height: 42px;
}

.workspace-grid {
  margin-top: 0.76rem;
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr) minmax(220px, 280px);
  align-items: start;
  gap: 0.75rem;
}

.doc-list,
.doc-reader,
.reader-side .side-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: color-mix(in srgb, var(--bg-elevated) 92%, transparent);
}

.doc-list {
  padding: 0.52rem;
  max-height: min(76vh, 940px);
  overflow: auto;
}

.doc-group + .doc-group {
  margin-top: 0.66rem;
}

.doc-group > h3 {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.28rem 0.36rem;
}

.doc-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--text-soft);
  display: grid;
  gap: 0.23rem;
  padding: 0.6rem;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.doc-item + .doc-item {
  margin-top: 0.34rem;
}

.doc-item:hover {
  border-color: var(--line);
  background: color-mix(in srgb, var(--accent-soft) 38%, transparent);
}

.doc-item.active {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 68%, transparent);
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.24rem;
  color: var(--accent);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.doc-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.08rem 0.32rem;
  background: color-mix(in srgb, var(--bg-soft) 86%, transparent);
}

.doc-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.28rem;
}

.doc-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.38rem;
  color: var(--text-muted);
  font-size: 0.67rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  background: color-mix(in srgb, var(--bg-soft) 86%, transparent);
}

.doc-title {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
}

.doc-summary {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.doc-path {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  overflow-wrap: anywhere;
}

.empty-hint {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 0.8rem;
}

.doc-reader {
  min-height: 620px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.reader-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 0.6rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-soft) 92%, transparent);
  padding: 0.84rem 0.96rem;
}

.reader-head p {
  margin: 0;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.66rem;
}

.reader-head h3 {
  margin: 0.3rem 0 0.22rem;
  color: var(--text);
  font-size: 0.98rem;
}

.doc-breadcrumb {
  margin-top: 0.26rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.28rem;
  color: var(--text-muted);
  font-size: 0.74rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.reader-head code {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  overflow-wrap: anywhere;
}

.reader-meta-line {
  margin-top: 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.34rem;
}

.reader-meta-line span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.14rem 0.48rem;
  color: var(--text-muted);
  font-size: 0.7rem;
  background: color-mix(in srgb, var(--bg-soft) 82%, transparent);
}

.reader-meta-line strong {
  color: var(--text);
  font-weight: 600;
}

.reader-tags {
  margin-top: 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.reader-tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.44rem;
  color: var(--accent);
  font-size: 0.68rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  background: color-mix(in srgb, var(--accent-soft) 56%, transparent);
}

.reader-actions {
  display: flex;
  gap: 0.42rem;
  flex-wrap: wrap;
}

.reader-actions a {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text-soft);
  padding: 0.3rem 0.56rem;
  font-size: 0.75rem;
  background: transparent;
}

.reader-actions a:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.reader-status {
  margin: 0.92rem 0.96rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.markdown-body {
  flex: 1;
  overflow: auto;
  padding: 0.95rem 0.96rem 1.2rem;
  color: var(--text-soft);
}

.markdown-body.width-normal {
  max-width: 860px;
}

.markdown-body.width-wide {
  max-width: 1160px;
}

.markdown-body.size-compact {
  font-size: 0.92rem;
}

.markdown-body.size-comfortable {
  font-size: 1rem;
}

.markdown-body.size-relaxed {
  font-size: 1.08rem;
}

.markdown-body > *:first-child {
  margin-top: 0;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  color: var(--text);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.markdown-body h1 {
  font-size: clamp(1.4rem, 2vw, 1.85rem);
  margin-top: 0.1rem;
}

.markdown-body h2 {
  font-size: clamp(1.14rem, 1.4vw, 1.38rem);
  margin-top: 1.5rem;
}

.markdown-body h3 {
  font-size: 1.02rem;
  margin-top: 1.1rem;
}

.markdown-body p,
.markdown-body li,
.markdown-body blockquote {
  color: var(--text-soft);
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.24rem;
}

.markdown-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.35rem 0;
}

.markdown-body pre,
.markdown-body code {
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
}

.markdown-body pre {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  overflow: auto;
  padding: 0.78rem;
  margin: 0.85rem 0;
}

.markdown-body :not(pre) > code {
  border-radius: 6px;
  background: color-mix(in srgb, var(--accent-soft) 68%, transparent);
  padding: 0.08rem 0.34rem;
  color: var(--text);
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 0.48rem;
  font-size: 0.88rem;
}

.markdown-body th {
  color: var(--text);
  background: color-mix(in srgb, var(--bg-soft) 94%, transparent);
}

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.reader-nav {
  border-top: 1px solid var(--line);
  padding: 0.62rem 0.96rem;
  display: flex;
  gap: 0.42rem;
  justify-content: flex-end;
  background: color-mix(in srgb, var(--bg-soft) 90%, transparent);
}

.reader-nav button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  color: var(--text-soft);
  min-height: 34px;
  padding: 0 0.65rem;
  font-size: 0.8rem;
}

.reader-nav button:disabled {
  opacity: 0.46;
  cursor: not-allowed;
}

.reader-side {
  display: grid;
  gap: 0.72rem;
  align-content: start;
}

.reader-side .side-card {
  padding: 0.7rem;
}

.side-card h3 {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
}

.side-card p {
  margin: 0.45rem 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.toc-list {
  list-style: none;
  margin: 0.56rem 0 0;
  padding: 0;
  max-height: 320px;
  overflow: auto;
}

.toc-list li + li {
  margin-top: 0.22rem;
}

.toc-list li[data-level="2"] {
  margin-left: 0.65rem;
}

.toc-list li[data-level="3"] {
  margin-left: 1.1rem;
}

.toc-list button {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  padding: 0.3rem 0.42rem;
  font-size: 0.78rem;
}

.toc-list button:hover {
  color: var(--text);
  border-color: var(--line);
  background: color-mix(in srgb, var(--accent-soft) 54%, transparent);
}

.related-list {
  margin-top: 0.5rem;
  display: grid;
  gap: 0.3rem;
}

.related-list button {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: color-mix(in srgb, var(--bg-soft) 86%, transparent);
  color: var(--text-soft);
  text-align: left;
  display: grid;
  gap: 0.22rem;
  padding: 0.42rem 0.48rem;
}

.related-list button:hover {
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 56%, transparent);
}

.related-list span {
  color: var(--text);
  font-size: 0.8rem;
}

.related-list small {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.side-control + .side-control {
  margin-top: 0.58rem;
}

.side-control > p {
  margin: 0;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pill-row {
  margin-top: 0.3rem;
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.pill-row button {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.74rem;
  min-height: 30px;
  padding: 0 0.56rem;
}

.pill-row button.active {
  color: var(--text);
  border-color: var(--line-strong);
  background: color-mix(in srgb, var(--accent-soft) 72%, transparent);
}

.footer {
  width: var(--container);
  margin: 1rem auto 1.7rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
}

.palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: start center;
  padding-top: min(12vh, 110px);
  background: rgba(0, 0, 0, 0.58);
  backdrop-filter: blur(4px);
}

.palette {
  width: min(760px, calc(100% - 1.2rem));
  border: 1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--bg-elevated) 96%, transparent 4%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.palette input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  min-height: 46px;
  padding: 0 0.92rem;
}

.palette-list {
  max-height: min(52vh, 460px);
  overflow: auto;
  padding: 0.44rem;
}

.palette-list button {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text-soft);
  padding: 0.54rem 0.62rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
}

.palette-list button:hover {
  border-color: var(--line);
  background: color-mix(in srgb, var(--accent-soft) 58%, transparent);
}

.palette-list small {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-family: "Geist Mono", "IBM Plex Mono", monospace;
  text-align: right;
  overflow-wrap: anywhere;
}

.floating {
  position: fixed;
  right: 0.84rem;
  bottom: 0.84rem;
  z-index: 35;
  border: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--bg-soft) 84%, var(--accent-soft));
  color: var(--text);
  border-radius: 999px;
  min-height: 38px;
  padding: 0 0.84rem;
  font-size: 0.76rem;
  box-shadow: var(--shadow-md);
}

@media (max-width: 1240px) {
  .pathway-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .docs-toolbar input {
    grid-column: span 2;
  }

  .workspace-grid {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  }

  .reader-side {
    grid-column: span 2;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

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

  .principles-grid {
    grid-template-columns: 1fr;
  }

  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .pathway-grid,
  .starter-list {
    grid-template-columns: 1fr;
  }

  .reader-side {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .doc-list {
    max-height: 360px;
  }

  .docs-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .docs-toolbar input,
  .docs-toolbar .btn:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 860px) {
  .topbar-inner {
    min-height: 60px;
    flex-wrap: wrap;
    padding: 0.45rem 0;
  }

  .top-nav {
    order: 3;
    width: 100%;
  }

  .controls {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 640px) {
  :root {
    --container: min(1320px, calc(100% - 1rem));
  }

  main {
    padding-top: 1rem;
  }

  .hero-inner,
  .docs-shell {
    padding: 0.86rem;
  }

  .docs-toolbar {
    grid-template-columns: 1fr;
  }

  .docs-toolbar input,
  .docs-toolbar .btn:last-child {
    grid-column: auto;
  }

  .workspace-meta span {
    width: 100%;
  }

  .reader-head {
    flex-direction: column;
    align-items: stretch;
  }

  .workspace-meta {
    gap: 0.35rem;
  }

  .floating {
    right: 0.56rem;
    bottom: 0.56rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}