:root{
  --bg:#0b1020; --card:#111831; --ink:#e7ecff; --muted:#a6b3d1; --acc:#7aa2ff; --ok:#7ef0b6; --warn:#ffd479; --err:#ff9393;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:radial-gradient(1200px 1200px at 30% -10%, #1d2a56 0%, transparent 60%) ,var(--bg);color:var(--ink);font:15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, 'Helvetica Neue', Arial, 'Apple Color Emoji','Segoe UI Emoji';}
header{position:sticky;top:0;background:linear-gradient(to bottom, rgba(11,16,32,.95), rgba(11,16,32,.6));backdrop-filter: blur(6px);z-index:10}
.wrap{max-width:1100px;margin:0 auto;padding:16px}
h1{margin:6px 0 10px;font-weight:800;letter-spacing:.2px}
p.lead{margin:0 0 8px;color:var(--muted)}
.row{display:grid;grid-template-columns: 1fr;gap:14px}
@media (min-width:900px){ .row{grid-template-columns: 1.2fr .8fr} }
.card{background:var(--card);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:14px;box-shadow:0 4px 20px rgba(0,0,0,.25)}
.card h2{margin:0 0 8px;font-size:16px}
.kv{width:100%;border-collapse:collapse;font-family:var(--mono);word-break:break-word}
.kv th,.kv td{padding:8px 10px;border-bottom:1px dashed rgba(255,255,255,.08);vertical-align:top}
.kv th{color:var(--muted);text-align:left;width:240px}
.kv tr:last-child th,.kv tr:last-child td{border-bottom:none}
details{margin:8px 0;padding:8px;border:1px solid rgba(255,255,255,.1);border-radius:10px}
summary{cursor:pointer;font-weight:600}
code, .mono{font-family:var(--mono)}
pre.mono.small{font-family:var(--mono);font-size:12px;white-space:pre-wrap}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
button{background:#1b2550;color:var(--ink);border:1px solid rgba(122,162,255,.4);padding:8px 10px;border-radius:10px;font-weight:600;cursor:pointer}
button:hover{background:#22306c}
.pill{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(255,255,255,.15);padding:4px 8px;border-radius:999px;margin-right:6px}
.pill.ok{border-color: rgba(126,240,182,.6)}
.pill.warn{border-color: rgba(255,212,121,.6)}
.pill.err{border-color: rgba(255,147,147,.6)}
.muted{color:var(--muted)}
.small{font-size:12px}
footer{opacity:.8}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mt8{margin-top:8px}
.mt16{margin-top:16px}
.sticky-note{background:#0f172a;border-left:4px solid var(--warn);padding:8px;border-radius:8px}
.danger-note{background:#2a0f12;border-left:4px solid var(--err);padding:8px;border-radius:8px}
.good-note{background:#0f2a20;border-left:4px solid var(--ok);padding:8px;border-radius:8px}
.tag{display:inline-block;padding:2px 6px;border:1px solid rgba(255,255,255,.15);border-radius:6px;margin:0 4px 4px 0}
.hl{color:var(--acc)}
.section-title{margin:18px 0 6px;font-size:14px;letter-spacing:.2px;text-transform:uppercase;color:#aab7df}
.inline-code{padding:2px 4px;border-radius:4px;background:rgba(255,255,255,.06)}

.glCanvas, .doodleCanvas, .fpCanvas {
  width:100%;
  max-width:480px;
  border:1px dashed rgba(255,255,255,.2);
  border-radius:8px;
}
.doodleCanvas{ margin-top:8px; }