@import url('https://fonts.googleapis.com/css2?family=Sora:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #071019;
  --bg2: #0d1b2b;
  --bg3: #13283f;
  --bg4: #1b3b5f;
  --border: rgba(118, 188, 255, 0.14);
  --border2: rgba(118, 188, 255, 0.26);
  --text: #eaf3ff;
  --muted: #9db4cf;
  --accent: #5cbcff;
  --accent2: #ff9a62;
  --accent3: #6fe1b1;
  --accent4: #c3dbff;
  --code-bg: #060e17;
  --tag-bg: rgba(92, 188, 255, 0.12);
  --tag-text: #96d7ff;
  --mono: 'JetBrains Mono', 'Cascadia Code', monospace;
  --sans: 'Inter', system-ui, sans-serif;
  --display: 'Sora', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background:
    radial-gradient(circle at top left, rgba(92, 188, 255, 0.16), transparent 30%),
    radial-gradient(circle at 92% 16%, rgba(111, 225, 177, 0.1), transparent 24%),
    linear-gradient(180deg, #060f18 0%, #071019 45%, #0b1624 100%);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.72;
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 286px;
  min-width: 286px;
  background: linear-gradient(180deg, rgba(13, 27, 43, 0.98), rgba(7, 17, 28, 0.96));
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 24px 0 40px;
  flex-shrink: 0;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.logo {
  padding: 0 22px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.logo-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo-sub {
  font-size: 11px;
  color: var(--muted);
  margin-top: 3px;
}

.nav-section { margin-bottom: 4px; }

.nav-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 10px 22px 4px;
}

.nav-link {
  display: block;
  padding: 7px 22px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.18s, background 0.18s, border-color 0.18s;
  border-left: 2px solid transparent;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(92, 188, 255, 0.08);
}

.nav-link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(92, 188, 255, 0.12);
}

.main {
  flex: 1;
  max-width: 980px;
  padding: 40px 48px 88px;
  overflow-x: hidden;
}

section {
  margin-bottom: 62px;
  scroll-margin-top: 28px;
}

h1 {
  font-family: var(--display);
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 24px 0 10px;
}

h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent4);
  margin: 16px 0 10px;
}

p {
  color: var(--muted);
  margin-bottom: 10px;
  line-height: 1.76;
  font-size: 14px;
}

p strong {
  color: var(--text);
  font-weight: 600;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

.hero {
  background:
    linear-gradient(135deg, rgba(92, 188, 255, 0.14) 0%, rgba(111, 225, 177, 0.06) 100%),
    linear-gradient(180deg, rgba(13, 27, 43, 0.92), rgba(7, 18, 30, 0.94));
  border: 1px solid rgba(92, 188, 255, 0.24);
  border-radius: 14px;
  padding: 26px 28px;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: auto -48px -48px auto;
  width: 190px;
  height: 190px;
  background: radial-gradient(circle, rgba(111, 225, 177, 0.24), transparent 70%);
  pointer-events: none;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent3);
  margin-bottom: 10px;
}

.hero-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.badge {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.badge-blue { background: rgba(92, 188, 255, 0.14); color: var(--accent); border: 1px solid rgba(92, 188, 255, 0.24); }
.badge-green { background: rgba(111, 225, 177, 0.12); color: var(--accent3); border: 1px solid rgba(111, 225, 177, 0.22); }
.badge-amber { background: rgba(255, 154, 98, 0.14); color: var(--accent2); border: 1px solid rgba(255, 154, 98, 0.22); }
.badge-purple { background: rgba(195, 219, 255, 0.12); color: var(--accent4); border: 1px solid rgba(195, 219, 255, 0.2); }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 12px 0;
  font-family: var(--mono);
  font-size: 12.7px;
  line-height: 1.65;
}

pre::-webkit-scrollbar { height: 4px; }
pre::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

code {
  font-family: var(--mono);
  font-size: 12.3px;
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--accent);
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: 12.7px;
}

.tag {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 12px;
  border: 1px solid rgba(92, 188, 255, 0.18);
}

.table-wrap { overflow-x: auto; margin: 12px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th {
  text-align: left;
  padding: 9px 12px;
  background: var(--bg3);
  color: var(--text);
  font-weight: 700;
  border-bottom: 1px solid var(--border2);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  vertical-align: top;
}

td strong { color: var(--text); }

ul.bullet,
ol {
  margin: 8px 0 12px 18px;
  color: var(--muted);
}

ul.bullet li,
ol li {
  margin-bottom: 7px;
  line-height: 1.68;
}

.card-grid {
  display: grid;
  gap: 12px;
  margin: 14px 0;
}

.card-grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(19, 40, 63, 0.54), rgba(11, 24, 38, 0.82));
  border-radius: 10px;
  padding: 14px 14px;
}

.card-title {
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  font-size: 13.5px;
}

.card-body {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.68;
}

.toc-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.toc-status {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent3);
}

.callout {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  border-radius: 10px;
  border: 1px solid var(--border2);
  padding: 12px 14px;
  margin: 14px 0;
  background: rgba(12, 30, 47, 0.72);
}

.callout-icon {
  width: 30px;
  height: 30px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--border2);
  color: var(--accent);
  background: rgba(92, 188, 255, 0.12);
}

.callout-body {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.callout-body strong { color: var(--text); }

.callout.warn {
  border-color: rgba(255, 154, 98, 0.25);
  background: rgba(61, 31, 16, 0.4);
}

.callout.warn .callout-icon {
  color: var(--accent2);
  border-color: rgba(255, 154, 98, 0.3);
  background: rgba(255, 154, 98, 0.14);
}

.callout.success {
  border-color: rgba(111, 225, 177, 0.25);
  background: rgba(17, 47, 38, 0.42);
}

.callout.success .callout-icon {
  color: var(--accent3);
  border-color: rgba(111, 225, 177, 0.3);
  background: rgba(111, 225, 177, 0.14);
}

@media (max-width: 1120px) {
  body { display: block; }
  .sidebar {
    width: 100%;
    min-width: 0;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .main {
    max-width: none;
    padding: 32px 20px 80px;
  }
}

@media (max-width: 720px) {
  .hero { padding: 22px 18px; }
  h1 { font-size: 27px; }
  .hero-meta { gap: 8px; }

/* ── LIGHT THEME ─────────────────────────────────── */
html[data-theme="light"] {
  --bg: #f3f6fb;
  --bg2: #ffffff;
  --bg3: #e9eef6;
  --bg4: #dae4f0;
  --border: rgba(15, 23, 42, 0.10);
  --border2: rgba(15, 23, 42, 0.18);
  --text: #182135;
  --muted: #5d6a82;
  --code-bg: #eef3f9;
  --accent: #2968d6;
  --accent2: #e06a1a;
  --accent3: #1a8a65;
  --accent4: #1a4882;
  --tag-bg: rgba(15, 23, 42, 0.06);
  --tag-text: #2968d6;
}

html[data-theme="light"] body {
  background: var(--bg);
  color: var(--text);
}

html[data-theme="light"] .sidebar {
  background: var(--bg2);
  border-right-color: var(--border);
}

html[data-theme="light"] .main {
  background: var(--bg);
}

html[data-theme="light"] .card {
  background: var(--bg2);
  border-color: var(--border);
}

html[data-theme="light"] .callout {
  background: var(--bg3);
  border-color: var(--border2);
}

html[data-theme="light"] .callout-icon {
  background: rgba(15, 23, 42, 0.06);
  border-color: var(--border2);
  color: var(--accent);
}

html[data-theme="light"] pre,
html[data-theme="light"] code {
  background: var(--code-bg);
  color: var(--text);
}
}