:root{
  --bg: #f8fafc;
  --panel: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --brand: #2563eb;
  --accent: #a855f7;
  --ok: #16a34a;
  --warn: #f59e0b;
  --danger: #ef4444;
  --pill: #eff6ff;
  --svg-ink: #0f172a;
}
:root[data-theme="dark"]{
  --bg: #0b1220;
  --panel: #0f172a;
  --ink: #e5e7eb;
  --muted: #9ca3af;
  --line: #1f2937;
  --brand: #60a5fa;
  --accent: #a78bfa;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #fb7185;
  --pill: #0b1020;
  --svg-ink: #e5e7eb;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1200px;margin:0 auto;padding:24px}
.header{display:flex;align-items:center;justify-content:space-between;padding:14px 0;margin-bottom:10px;border-bottom:1px solid var(--line);gap:14px}
.brand{display:flex;gap:12px;align-items:center}
.logo{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--accent));color:white;display:grid;place-items:center;font-weight:800}
.small{font-size:12px;color:var(--muted)}
.grid{display:grid;gap:20px;grid-template-columns:280px 1fr}
@media (max-width: 980px){.grid{grid-template-columns:1fr} .sidebar{position:static;height:auto}}
.sidebar{position:sticky;top:12px;height:calc(100vh - 24px);overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:16px}
.sidebar h3{margin:4px 10px 8px;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.nav a{display:flex;gap:10px;align-items:center;padding:8px 10px;border-radius:12px;color:var(--ink)}
.nav a:hover{background:linear-gradient(135deg,#dbeafe33,#f5d0fe33)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px 20px}
h1{font-size:28px;margin:2px 0}
h2{font-size:22px;margin:0 0 8px}
h3{font-size:18px;margin:10px 0 6px}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 2px}
.tag{display:inline-flex;gap:6px;align-items:center;background:var(--pill);border:1px solid var(--line);border-radius:999px;color:var(--brand);padding:2px 10px;font-size:12px}
.kv{display:grid;grid-template-columns:220px 1fr;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.kv div{padding:10px;border-bottom:1px solid var(--line)}
.kv div:nth-child(odd){background:color-mix(in srgb, var(--panel), #000 3%);color:var(--ink)}
.kv div:nth-child(even){background:var(--panel)}
table{width:100%;border-collapse:separate;border-spacing:0;border-radius:14px;border:1px solid var(--line);overflow:hidden}
th,td{padding:10px;border-bottom:1px solid var(--line)}
th{background:color-mix(in srgb, var(--panel), #000 6%);text-align:left;color:var(--ink)}
tr:last-child td{border-bottom:none}
.callout,.tip,.good,.bad{border-left:6px solid var(--brand);background:color-mix(in srgb, var(--panel), #000 4%);padding:10px 12px;border-radius:12px}
.tip{border-left-color:var(--warn)}
.good{border-left-color:var(--ok)}
.bad{border-left-color:var(--danger)}
.figure{display:flex;flex-direction:column;gap:6px;align-items:center;margin:12px 0}
.figcap{font-size:12px;color:var(--muted)}
.controls{display:flex;gap:10px;flex-wrap:wrap}
input[type="search"]{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:10px 12px;border-radius:12px;min-width:260px}
.btn{cursor:pointer;background:var(--panel);border:1px solid var(--line);color:var(--ink);border-radius:12px;padding:10px 12px}
.btn:hover{background:linear-gradient(135deg,#dbeafe55,#f5d0fe55)}
footer{margin:24px 0;color:var(--muted);font-size:12px;text-align:center}
.badge{display:inline-block;border:1px solid var(--line);border-radius:8px;padding:2px 8px;font-size:12px;color:var(--accent)}
.hr{height:1px;background:var(--line);margin:16px 0}
/* Ensure SVG text is visible in dark/light by using CSS variable */ 
.svg-label { fill: var(--svg-ink); stroke: none; }