:root {
  --bg: #0d1219;
  --bg2: #151d28;
  --bg3: #1d2735;
  --bg4: #253245;
  --border: rgba(255, 255, 255, 0.08);
  --border2: rgba(255, 255, 255, 0.16);
  --text: #e6edf5;
  --muted: #91a0b6;
  --accent: #2f83c7;
  --accent2: #62b2f4;
  --accent3: #73d2de;
  --accent4: #e2886a;
  --accent5: #7d98ff;
  --accent6: #61d5a7;
  --code-bg: #0a1018;
  --tag-bg: rgba(47, 131, 199, 0.12);
  --tag-text: #82c7ff;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --sans: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.7;
  display: flex;
  min-height: 100vh;
}

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

.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--bg2);
  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 20px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.logo-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo-sub { font-size: 11px; color: var(--muted); margin-top: 2px; }
.nav-section { margin-bottom: 4px; }

.nav-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 10px 20px 4px;
}

.nav-link {
  display: block;
  padding: 6px 20px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.15s, background 0.15s;
  border-left: 2px solid transparent;
}

.nav-link:hover { color: var(--text); background: var(--bg3); }
.nav-link.active { color: var(--accent2); border-left-color: var(--accent); background: rgba(47, 131, 199, 0.08); }

.main {
  flex: 1;
  max-width: 920px;
  padding: 40px 48px 80px;
  overflow-x: hidden;
}

section { margin-bottom: 60px; scroll-margin-top: 24px; }
h1 { font-size: 28px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 { font-size: 15px; font-weight: 600; color: var(--text); margin: 24px 0 10px; }
p { color: var(--muted); margin-bottom: 10px; line-height: 1.7; font-size: 14px; }
p strong { color: var(--text); font-weight: 500; }
a { color: var(--accent5); text-decoration: none; }
a:hover { text-decoration: underline; }

.hero {
  background: linear-gradient(135deg, rgba(47, 131, 199, 0.12) 0%, rgba(98, 178, 244, 0.06) 100%);
  border: 1px solid rgba(47, 131, 199, 0.24);
  border-radius: 10px;
  padding: 24px 28px;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(98, 178, 244, 0.18), transparent 70%);
  pointer-events: none;
}

.hero h1 { font-size: 22px; margin-bottom: 4px; }
.hero-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 14px; }

.badge {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.badge-red { background: rgba(47, 131, 199, 0.16); color: #82c7ff; border: 1px solid rgba(47, 131, 199, 0.26); }
.badge-blue { background: rgba(125, 152, 255, 0.16); color: #aebeff; border: 1px solid rgba(125, 152, 255, 0.24); }
.badge-green { background: rgba(97, 213, 167, 0.12); color: #77dfb5; border: 1px solid rgba(97, 213, 167, 0.22); }
.badge-amber { background: rgba(115, 210, 222, 0.12); color: #8ee3ed; border: 1px solid rgba(115, 210, 222, 0.2); }
.badge-purple { background: rgba(180, 124, 245, 0.14); color: #cfb0fb; border: 1px solid rgba(180, 124, 245, 0.22); }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 12px 0;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
}

code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px;
  border-radius: 4px;
  color: var(--accent3);
}

pre code { background: none; padding: 0; border-radius: 0; color: inherit; font-size: 13px; }

.table-wrap { overflow-x: auto; margin: 12px 0; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg3);
  color: var(--text);
  font-weight: 500;
  border-bottom: 1px solid var(--border2);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td { padding: 9px 12px; border-bottom: 1px solid var(--border); color: var(--muted); vertical-align: top; }
tr:hover td { background: rgba(255, 255, 255, 0.02); }

.mode-card {
  border-radius: 10px;
  padding: 18px 20px;
  border-left: 3px solid var(--accent5);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.mode-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.mode-name { font-size: 14px; font-weight: 600; color: var(--text); }

.mode-shortcut {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg4);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--muted);
  border: 1px solid var(--border2);
}

.callout {
  display: flex;
  gap: 12px;
  border-radius: 8px;
  padding: 14px 16px;
  margin: 14px 0;
  font-size: 13px;
  line-height: 1.6;
}

.callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.callout-body { color: var(--muted); }
.callout-body strong { color: var(--text); }
.callout.tip { background: rgba(97, 213, 167, 0.07); border: 1px solid rgba(97, 213, 167, 0.18); }
.callout.warn { background: rgba(226, 136, 106, 0.08); border: 1px solid rgba(226, 136, 106, 0.2); }
.callout.info { background: rgba(47, 131, 199, 0.09); border: 1px solid rgba(47, 131, 199, 0.2); }

.flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0;
}

.flow-step {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--text);
}

.flow-arrow { color: var(--muted); font-size: 14px; }

.link-list { list-style: none; display: flex; flex-direction: column; gap: 6px; margin: 10px 0; }

.link-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 13px;
  transition: border-color 0.15s;
}

.link-list li:hover { border-color: var(--border2); }
.link-list .ll-tag { font-size: 10px; color: var(--muted); background: var(--bg3); padding: 1px 6px; border-radius: 4px; flex-shrink: 0; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 3px; }

@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { padding: 24px 20px 60px; }
}