html {
  color-scheme: dark;
}

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

:root {
  --bg-base: #0c0e14;
  --bg-surface: #12151f;
  --bg-card: #181c28;
  --bg-code: #0e1117;
  --bg-sidebar: #10131b;
  --border: #1f2535;
  --border-accent: #2e3a58;
  --text-primary: #e8ecf5;
  --text-secondary: #8b95b0;
  --text-muted: #4a5570;
  --accent-blue: #4f8ef7;
  --accent-cyan: #22d3ee;
  --accent-green: #34d399;
  --accent-orange: #fb923c;
  --accent-purple: #a78bfa;
  --accent-yellow: #fbbf24;
  --accent-red: #f87171;
  --accent-pink: #f472b6;
  --hl-keyword: #a78bfa;
  --hl-string: #34d399;
  --hl-number: #fb923c;
  --hl-comment: #4a5570;
  --hl-func: #4f8ef7;
  --hl-class: #22d3ee;
  --hl-param: #e8ecf5;
  --sidebar-w: 280px;
  --radius: 8px;
}

html[data-theme="light"] {
  --bg-base: #f4f8fd;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-code: #edf4fb;
  --bg-sidebar: #ffffff;
  --border: rgba(18, 37, 63, 0.10);
  --border-accent: rgba(79, 142, 247, 0.28);
  --text-primary: #17263a;
  --text-secondary: #52637c;
  --text-muted: #7a879b;
  --hl-comment: #8693a7;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  background: radial-gradient(circle at top right, rgba(79, 142, 247, 0.10), transparent 32%), var(--bg-base);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 24px 0 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--border-accent);
  border-radius: 4px;
}

.logo {
  padding: 0 20px 18px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.logo-title {
  font-family: 'Sora', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-blue);
  letter-spacing: 0.04em;
}

.logo-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

.sidebar-section,
.nav-section {
  margin-bottom: 8px;
}

.sidebar-section-title,
.nav-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 12px 20px 6px;
}

.sidebar-link,
.nav-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 20px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 13.5px;
  font-weight: 400;
  border-left: 3px solid transparent;
  transition: all 0.18s;
  line-height: 1.3;
}

.sidebar-link:hover,
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
  border-left-color: var(--border-accent);
}

html[data-theme="light"] .sidebar-link:hover,
html[data-theme="light"] .nav-link:hover {
  background: rgba(23, 38, 58, 0.03);
}

.sidebar-link.active,
.nav-link.active {
  color: var(--accent-blue);
  background: rgba(79, 142, 247, 0.08);
  border-left-color: var(--accent-blue);
  font-weight: 500;
}

.sidebar-link .icon,
.nav-link .icon {
  font-size: 14px;
  opacity: 0.85;
  width: 16px;
  text-align: center;
}

.main {
  flex: 1;
  min-width: 0;
  max-width: 980px;
  padding: 44px 56px 80px;
  overflow-x: hidden;
}

.hero {
  margin-bottom: 60px;
  padding: 48px 52px;
  background: linear-gradient(135deg, rgba(79, 142, 247, 0.11), rgba(34, 211, 238, 0.06)), var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 82% 0%, rgba(79, 142, 247, 0.16) 0%, transparent 60%),
              radial-gradient(ellipse at 12% 100%, rgba(34, 211, 238, 0.08) 0%, transparent 52%);
  pointer-events: none;
}

.hero-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-tag::before {
  content: '//';
  opacity: 0.5;
}

.hero h1 {
  position: relative;
  font-family: 'Sora', sans-serif;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #eef4ff 20%, #7bb3ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

html[data-theme="light"] .hero h1 {
  background: linear-gradient(135deg, #162536 25%, #2268d2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  position: relative;
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 620px;
  line-height: 1.75;
}

.hero-chips {
  position: relative;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.chip,
.badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid;
}

.chip-blue { color: var(--accent-blue); border-color: rgba(79, 142, 247, 0.35); background: rgba(79, 142, 247, 0.08); }
.chip-green { color: var(--accent-green); border-color: rgba(52, 211, 153, 0.35); background: rgba(52, 211, 153, 0.08); }
.chip-orange { color: var(--accent-orange); border-color: rgba(251, 146, 60, 0.35); background: rgba(251, 146, 60, 0.08); }
.chip-purple { color: var(--accent-purple); border-color: rgba(167, 139, 250, 0.35); background: rgba(167, 139, 250, 0.08); }
.chip-cyan { color: var(--accent-cyan); border-color: rgba(34, 211, 238, 0.35); background: rgba(34, 211, 238, 0.08); }

.section {
  margin-bottom: 64px;
  scroll-margin-top: 28px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.section-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.icon-blue { background: rgba(79, 142, 247, 0.15); }
.icon-cyan { background: rgba(34, 211, 238, 0.15); }
.icon-green { background: rgba(52, 211, 153, 0.15); }
.icon-orange { background: rgba(251, 146, 60, 0.15); }
.icon-purple { background: rgba(167, 139, 250, 0.15); }
.icon-pink { background: rgba(244, 114, 182, 0.15); }
.icon-yellow { background: rgba(251, 191, 36, 0.15); }

.section-title-wrap h2 {
  font-family: 'Sora', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.section-title-wrap .section-sub {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.section-divider {
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
  margin-bottom: 28px;
}

.section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 14.5px;
}

h3 {
  font-family: 'Sora', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 28px 0 12px;
}

h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 20px 0 8px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
}

.card-title {
  font-family: 'Sora', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-blue { background: var(--accent-blue); }
.dot-green { background: var(--accent-green); }
.dot-orange { background: var(--accent-orange); }
.dot-purple { background: var(--accent-purple); }
.dot-cyan { background: var(--accent-cyan); }
.dot-pink { background: var(--accent-pink); }

.card p,
.card li {
  color: var(--text-secondary);
  font-size: 14px;
}

.card ul {
  padding-left: 18px;
}

.card ul li {
  margin-bottom: 5px;
}

.code-wrap {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 16px 0;
  font-family: 'JetBrains Mono', monospace;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
}

.code-lang {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.copy-btn {
  font-size: 11px;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 10px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}

.copy-btn:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.code-block {
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
  white-space: pre;
  tab-size: 4;
}

.kw { color: var(--hl-keyword); }
.st { color: var(--hl-string); }
.nm { color: var(--hl-number); }
.cm { color: var(--hl-comment); font-style: italic; }
.fn { color: var(--hl-func); }
.cl { color: var(--hl-class); }
.pm { color: var(--hl-param); }
.im { color: var(--accent-pink); }
.op { color: var(--text-muted); }

.info-box {
  display: flex;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius);
  margin: 16px 0;
  border-left: 4px solid;
}

.info-box.tip { background: rgba(52, 211, 153, 0.08); border-color: var(--accent-green); }
.info-box.note { background: rgba(79, 142, 247, 0.08); border-color: var(--accent-blue); }
.info-box.warn { background: rgba(251, 146, 60, 0.08); border-color: var(--accent-orange); }
.info-box.api { background: rgba(167, 139, 250, 0.08); border-color: var(--accent-purple); }
.info-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.info-content { font-size: 13.5px; color: var(--text-secondary); line-height: 1.6; }
.info-content strong { color: var(--text-primary); }

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  background: rgba(79, 142, 247, 0.12);
  color: var(--accent-blue);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid rgba(79, 142, 247, 0.2);
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.ref-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.ref-table th {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 16px;
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
}

.ref-table td {
  padding: 11px 16px;
  font-size: 13.5px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(31, 37, 53, 0.6);
  vertical-align: top;
}

.ref-table tr:last-child td { border-bottom: none; }
.ref-table tr:hover td { background: rgba(255, 255, 255, 0.02); }
.ref-table td code { font-size: 11.5px; }
.ref-table .method-name { color: var(--accent-blue); font-family: 'JetBrains Mono', monospace; font-size: 12.5px; }

.cat-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 4px;
  font-weight: 600;
}

.pipeline {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  margin: 20px 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.pipe-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12.5px;
  min-width: 90px;
}

.pipe-step .picon { font-size: 22px; }
.pipe-step .plabel { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--text-muted); letter-spacing: 0.8px; text-transform: uppercase; }
.pipe-step .pname { font-size: 12px; color: var(--text-secondary); font-weight: 500; }
.pipe-arrow { color: var(--border-accent); font-size: 18px; margin: 0 6px; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-accent); border-radius: 6px; }

@media (max-width: 900px) {
  .sidebar {
    display: none;
  }

  .main {
    padding: 28px 20px 60px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 32px 28px;
  }

  .hero h1 {
    font-size: 28px;
  }
}