:root {
  --bg: #f6f8f7;
  --surface: #ffffff;
  --surface-2: #eef4f1;
  --ink: #12221e;
  --muted: #586b65;
  --line: #d9e3df;
  --accent: #2f6f63;
  --accent-2: #315f9b;
  --accent-3: #b46b2a;
  --code-bg: #0f1917;
  --code-ink: #eef8f3;
  --shadow: 0 18px 42px rgba(18, 34, 30, 0.09);
  --radius: 8px;
  --sidebar: 292px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: inherit;
}

code,
pre {
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #e9f1ee;
  color: #17342e;
  font-size: 0.92em;
}

pre {
  position: relative;
  margin: 16px 0 0;
  padding: 16px;
  overflow-x: auto;
  color: var(--code-ink);
  background: var(--code-bg);
  border-radius: var(--radius);
  border: 1px solid #21342f;
  font-size: 13px;
  line-height: 1.55;
}

pre code {
  padding: 0;
  background: transparent;
  color: inherit;
  white-space: pre;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar);
  padding: 24px 18px;
  overflow-y: auto;
  background: #fbfcfb;
  border-right: 1px solid var(--line);
}

.brand {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, #17342e, #2f6f63 65%, #b46b2a);
  font-weight: 800;
  letter-spacing: 0;
}

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

.brand strong {
  font-size: 17px;
}

.brand span {
  color: var(--muted);
  font-size: 13px;
}

.search-box {
  display: block;
  margin-bottom: 18px;
}

.search-box span {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.search-box input {
  width: 100%;
  min-height: 40px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 111, 99, 0.14);
}

.nav-list {
  display: grid;
  gap: 4px;
}

.nav-list a {
  display: block;
  padding: 10px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 650;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--ink);
  background: var(--surface-2);
}

.content {
  margin-left: var(--sidebar);
  min-width: 0;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-end;
  padding: 56px clamp(28px, 5vw, 72px) 36px;
  background:
    linear-gradient(0deg, rgba(246, 248, 247, 1), rgba(246, 248, 247, 0.72)),
    radial-gradient(circle at 78% 20%, rgba(49, 95, 155, 0.1), transparent 34%),
    linear-gradient(120deg, #ffffff 0%, #eef5f2 52%, #f5efe8 100%);
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(38px, 5vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 10px 15px;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 750;
  cursor: pointer;
}

.button.secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.button.compact {
  min-height: 36px;
  padding: 8px 12px;
}

.section {
  padding: 54px clamp(28px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  max-width: 880px;
  margin-bottom: 26px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow) {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.stat-grid,
.concept-grid,
.feature-grid,
.reference-grid,
.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}

.stat-grid article,
.concept-grid article,
.feature-card,
.reference-grid article,
.example-card,
.command-card,
.tutorials article,
.step,
.callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-grid article,
.concept-grid article,
.feature-card,
.reference-grid article,
.example-card,
.command-card {
  padding: 20px;
}

.stat-grid strong,
.feature-card h3,
.concept-grid h3,
.reference-grid h3,
.example-card h3,
.command-card h3,
.tutorials h3 {
  margin: 0 0 8px;
}

.stat-grid span,
.feature-card p,
.concept-grid p,
.reference-grid p,
.example-card p,
.command-card p,
.tutorials p,
.tutorials li {
  color: var(--muted);
}

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

.step {
  padding: 18px;
}

.step > span {
  display: grid;
  width: 30px;
  height: 30px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 999px;
  color: #fff;
  background: var(--accent-2);
  font-weight: 800;
}

.callout {
  margin-top: 16px;
  padding: 18px 20px;
  background: #fff9ef;
  border-color: #ead8bd;
}

.callout p {
  margin: 6px 0 0;
  color: #60472f;
}

.diagram {
  margin: 0;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.diagram img {
  display: block;
  width: 100%;
  height: auto;
}

.feature-card {
  display: grid;
  gap: 12px;
}

.tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag,
.category {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border-radius: 999px;
  color: #254740;
  background: #e8f2ee;
  font-size: 12px;
  font-weight: 750;
}

.category {
  color: #4e3921;
  background: #f5eadb;
}

.tutorials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.tutorials article {
  padding: 22px;
}

.tutorials ol {
  margin: 10px 0 0;
  padding-left: 20px;
}

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

.filter-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-chip {
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
  font-weight: 700;
}

.filter-chip.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px;
}

.command-card {
  display: grid;
  gap: 12px;
}

.command-title {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
}

.command-title code {
  font-size: 18px;
  font-weight: 800;
  color: var(--accent);
}

.aliases {
  color: var(--muted);
  font-size: 13px;
}

.copy-button {
  position: absolute;
  top: 8px;
  right: 8px;
  min-height: 28px;
  padding: 5px 8px;
  border-radius: 6px;
  border: 1px solid #39524b;
  color: #e8f8f2;
  background: #1c2b27;
  cursor: pointer;
  font-size: 12px;
}

.empty-state {
  padding: 30px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.6);
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 20;
  display: none;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow);
  cursor: pointer;
  font-weight: 800;
}

.back-to-top.visible {
  display: inline-flex;
  align-items: center;
}

.hidden {
  display: none !important;
}

@media (max-width: 980px) {
  .sidebar {
    position: static;
    width: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .content {
    margin-left: 0;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

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

@media (max-width: 640px) {
  .section,
  .topbar {
    padding-left: 18px;
    padding-right: 18px;
  }

  .command-grid,
  .tutorials {
    grid-template-columns: 1fr;
  }

  .toolbar {
    flex-direction: column;
  }
}