:root {
  --bg: #0f1117;
  --bg-soft: #161923;
  --panel: #1b1f2b;
  --panel-2: #202635;
  --border: #2a3040;
  --border-soft: #242a38;
  --text: #e6e9f0;
  --text-dim: #9aa3b5;
  --text-faint: #6b7385;
  --accent: #5b8cff;
  --accent-2: #7c5cff;
  --green: #34c98e;
  --amber: #f0b429;
  --red: #f2574d;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 15px;
}

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

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(15,17,23,.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 22px; height: 58px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 15px; color: var(--text);
  white-space: nowrap;
}
.brand .dot {
  width: 10px; height: 10px; border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(91,140,255,.6);
}
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav a {
  color: var(--text-dim); padding: 6px 12px; border-radius: 8px;
  font-size: 13.5px; font-weight: 500; white-space: nowrap;
}
nav a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
nav a.active { color: var(--text); background: var(--panel-2); }

/* ---------- layout ---------- */
.wrap { max-width: 1180px; margin: 0 auto; padding: 36px 24px 80px; }
.hero { padding: 46px 0 30px; }
.hero h1 { font-size: 34px; margin: 0 0 12px; letter-spacing: -.5px; }
.hero h1 .grad {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 17px; color: var(--text-dim); max-width: 780px; margin: 0 0 8px; }
.hero .sub { font-size: 13.5px; color: var(--text-faint); }

h2 { font-size: 22px; margin: 44px 0 14px; letter-spacing: -.3px; }
h2 .hash { color: var(--accent); margin-right: 6px; }
h3 { font-size: 16.5px; margin: 28px 0 10px; }

/* ---------- cards ---------- */
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px 20px;
}
.card h4 { margin: 0 0 8px; font-size: 15px; }
.card p { margin: 0; color: var(--text-dim); font-size: 13.5px; }
.card .tag {
  display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 6px;
  background: var(--panel-2); color: var(--accent); font-family: var(--mono);
  margin-bottom: 10px;
}

/* ---------- module table ---------- */
.module {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 14px; overflow: hidden;
}
.module-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 20px;
  cursor: pointer; user-select: none;
}
.module-head:hover { background: var(--panel-2); }
.module-head .name {
  font-family: var(--mono); font-size: 14.5px; font-weight: 600; color: var(--text);
}
.module-head .role { font-size: 13px; color: var(--text-dim); flex: 1; }
.module-head .size {
  font-family: var(--mono); font-size: 12px; color: var(--text-faint);
  background: var(--panel-2); padding: 2px 8px; border-radius: 6px;
}
.module-head .chev { color: var(--text-faint); transition: transform .18s; }
.module.open .chev { transform: rotate(90deg); }
.module-body { display: none; padding: 4px 20px 18px; border-top: 1px solid var(--border-soft); }
.module.open .module-body { display: block; }
.module-body .desc { color: var(--text-dim); font-size: 14px; margin: 12px 0; }

.fn { display: flex; gap: 10px; padding: 4px 0; font-size: 13.5px; align-items: baseline; }
.fn .ln {
  font-family: var(--mono); color: var(--text-faint); font-size: 12px;
  min-width: 44px; text-align: right; flex-shrink: 0;
}
.fn .sig { font-family: var(--mono); color: #c9d4ff; }
.fn .note { color: var(--text-dim); font-size: 12.5px; }

/* ---------- callout ---------- */
.callout {
  border-radius: 10px; padding: 14px 18px; margin: 16px 0;
  font-size: 14px; border: 1px solid; line-height: 1.6;
}
.callout.info { background: rgba(91,140,255,.08); border-color: rgba(91,140,255,.25); }
.callout.ok { background: rgba(52,201,142,.08); border-color: rgba(52,201,142,.25); }
.callout.warn { background: rgba(240,180,41,.08); border-color: rgba(240,180,41,.28); }
.callout.bad { background: rgba(242,87,77,.08); border-color: rgba(242,87,77,.28); }
.callout b { font-weight: 600; }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 14px 0; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
th { color: var(--text-dim); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; }
td code, th code { font-family: var(--mono); font-size: 12.5px; color: #c9d4ff; }
.mono { font-family: var(--mono); font-size: 12.5px; }

/* ---------- code blocks ---------- */
pre {
  background: #0a0c12; border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 12.5px; line-height: 1.55;
  color: #d6dbe8;
}
code { font-family: var(--mono); }
pre .c { color: #6b7385; }  /* comment */
pre .k { color: #7c5cff; }  /* keyword */
pre .s { color: #7fd6a5; }  /* string */

/* ---------- flow / diagram ---------- */
.flow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 20px 0; }
.flow .node {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 18px; text-align: center;
}
.flow .node .t { font-weight: 700; font-size: 14px; }
.flow .node .d { font-size: 12px; color: var(--text-dim); margin-top: 2px; }
.flow .arrow { color: var(--text-faint); font-size: 20px; font-family: var(--mono); }
.flow .arrow .lbl { font-size: 10px; color: var(--accent); display: block; text-align: center; }

.pill {
  display: inline-block; font-size: 11.5px; padding: 2px 9px; border-radius: 20px;
  font-weight: 600; margin-right: 4px;
}
.pill.g { background: rgba(52,201,142,.14); color: var(--green); }
.pill.a { background: rgba(240,180,41,.14); color: var(--amber); }
.pill.r { background: rgba(242,87,77,.14); color: var(--red); }
.pill.b { background: rgba(91,140,255,.14); color: var(--accent); }

.footer {
  border-top: 1px solid var(--border); margin-top: 60px; padding-top: 24px;
  color: var(--text-faint); font-size: 12.5px; display: flex; gap: 16px; flex-wrap: wrap;
}

.badge-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0; }