/* GraphMind — OLED ink, graph violet vs vanilla slate, verdict green/red. */
:root {
  --bg: #070a12;
  --bg-elev: #0b0f1a;
  --surface: #0f1524;
  --surface-2: #131b2e;
  --border: #1c2740;
  --border-hi: #2c3b5e;
  --text: #e7ecf6;
  --muted: #8b96ad;
  --faint: #5a657e;
  --graph: #a78bfa;
  --graph-hi: #c4b5fd;
  --graph-dim: rgba(167, 139, 250, 0.13);
  --van: #94a3b8;
  --van-dim: rgba(148, 163, 184, 0.1);
  --ok: #34d399;
  --ok-dim: rgba(52, 211, 153, 0.12);
  --bad: #f87171;
  --bad-dim: rgba(248, 113, 113, 0.1);
  --warn: #fbbf24;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --disp: "Space Grotesk", system-ui, sans-serif;
  --sans: "Inter", system-ui, sans-serif;
  --r: 11px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 15px; line-height: 1.55; min-height: 100dvh; }
::selection { background: var(--graph-dim); color: var(--graph-hi); }
button { font: inherit; cursor: pointer; }
a { color: inherit; }

.ambient { position: fixed; inset: 0; z-index: -1;
  background: radial-gradient(950px 500px at 85% -10%, rgba(167, 139, 250, 0.09), transparent 60%),
    radial-gradient(700px 420px at -8% 110%, rgba(52, 211, 153, 0.05), transparent 60%), var(--bg); }
.ambient::after { content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(var(--border) 1px, transparent 1px);
  background-size: 26px 26px; opacity: 0.35;
  mask-image: radial-gradient(900px 520px at 50% 0%, #000, transparent 78%); }
@media (prefers-reduced-motion: reduce) { * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }

.wrap { max-width: 1220px; margin: 0 auto; padding: 0 24px; }

nav { position: sticky; top: 0; z-index: 50; background: rgba(7, 10, 18, 0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-in { display: flex; align-items: center; gap: 14px; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--disp); font-weight: 700; font-size: 18px; text-decoration: none; }
.brand b { color: var(--graph); }
.nav-tag { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.6px; }
.pill { margin-left: auto; font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--graph-hi); background: var(--graph-dim); border: 1px solid rgba(167, 139, 250, 0.35); padding: 5px 12px; border-radius: 999px; }

header.hero { padding: 44px 0 14px; }
h1 { font-family: var(--disp); font-size: clamp(28px, 4.2vw, 44px); line-height: 1.08; letter-spacing: -0.4px; max-width: 860px; }
h1 .v { color: var(--van); }
h1 .g { color: var(--graph); }
.sub { color: var(--muted); max-width: 780px; margin-top: 13px; font-size: 15.5px; }
.sub code { font-family: var(--mono); font-size: 12.5px; color: var(--graph-hi); background: var(--graph-dim); padding: 2px 7px; border-radius: 6px; }

.disclosure { margin-top: 20px; display: flex; gap: 12px; align-items: flex-start; border: 1px solid var(--border-hi); border-left: 3px solid var(--warn); background: var(--bg-elev); border-radius: var(--r); padding: 13px 17px; font-size: 13px; color: var(--muted); max-width: 940px; }
.disclosure b { color: var(--warn); }

.scoreboard { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: stretch; margin: 28px 0 8px; }
.score-card { border: 1px solid var(--border); border-radius: 14px; padding: 20px 22px; background: var(--surface); }
.score-card.van { border-color: rgba(148, 163, 184, 0.35); }
.score-card.hyb { border-color: rgba(167, 139, 250, 0.5); background: linear-gradient(170deg, var(--graph-dim), var(--surface) 60%); }
.score-card .sc-name { font-family: var(--disp); font-weight: 700; font-size: 15px; display: flex; gap: 8px; align-items: center; }
.score-card.van .sc-name { color: var(--van); }
.score-card.hyb .sc-name { color: var(--graph-hi); }
.score-card .sc-big { font-family: var(--disp); font-size: 52px; font-weight: 700; letter-spacing: -1.5px; margin: 8px 0 2px; font-variant-numeric: tabular-nums; }
.score-card .sc-sub { font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.8px; text-transform: uppercase; }
.score-card .sc-split { display: flex; gap: 18px; margin-top: 14px; }
.score-card .sc-split div { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.score-card .sc-split b { display: block; font-size: 18px; color: var(--text); font-family: var(--disp); }
.vs { display: grid; place-items: center; font-family: var(--disp); font-weight: 700; color: var(--faint); font-size: 15px; }
.delta { border: 1px solid rgba(52, 211, 153, 0.4); background: var(--ok-dim); color: var(--ok); border-radius: 999px; font-family: var(--mono); font-size: 12px; font-weight: 700; padding: 6px 14px; white-space: nowrap; }

.graph-stats { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 14px 0 0; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.graph-stats b { color: var(--graph-hi); }

h2.sec { font-family: var(--disp); font-size: 22px; margin: 42px 0 6px; letter-spacing: -0.3px; }
.sec-sub { color: var(--muted); font-size: 13.5px; margin-bottom: 16px; }

.q-layout { display: grid; grid-template-columns: 330px 1fr; gap: 18px; align-items: start; }
.q-list { display: grid; gap: 6px; max-height: 640px; overflow-y: auto; padding-right: 4px; }
.q-item { text-align: left; border: 1px solid var(--border); background: var(--bg-elev); border-radius: 9px; padding: 10px 13px; color: var(--muted); display: grid; gap: 5px; transition: border-color 0.15s, background 0.15s; }
.q-item:hover { border-color: var(--border-hi); }
.q-item.on { border-color: var(--graph); background: var(--graph-dim); color: var(--text); }
.q-item .qi-top { display: flex; gap: 8px; align-items: center; font-family: var(--mono); font-size: 10.5px; }
.q-item .qi-id { color: var(--faint); font-weight: 700; }
.tag { padding: 2px 8px; border-radius: 999px; font-weight: 700; letter-spacing: 0.5px; }
.tag.single { color: var(--van); background: var(--van-dim); border: 1px solid rgba(148, 163, 184, 0.3); }
.tag.multi { color: var(--graph-hi); background: var(--graph-dim); border: 1px solid rgba(167, 139, 250, 0.35); }
.qi-verdict { margin-left: auto; display: flex; gap: 5px; }
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot.ok { background: var(--ok); }
.dot.bad { background: var(--bad); }
.q-item .qi-q { font-size: 12.5px; line-height: 1.45; }

.q-detail { border: 1px solid var(--border); border-radius: 14px; background: var(--bg-elev); padding: 22px; position: sticky; top: 76px; }
.qd-q { font-family: var(--disp); font-size: 19px; font-weight: 700; line-height: 1.3; }
.qd-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; margin: 10px 0 18px; font-family: var(--mono); font-size: 11.5px; color: var(--muted); align-items: center; }
.qd-meta .gold { color: var(--ok); font-weight: 700; }
.answers { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.ans { border: 1px solid var(--border); border-radius: 11px; overflow: hidden; }
.ans .a-h { display: flex; gap: 8px; align-items: center; padding: 9px 14px; font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 0.8px; border-bottom: 1px solid var(--border); }
.ans.van .a-h { color: var(--van); background: var(--van-dim); }
.ans.hyb .a-h { color: var(--graph-hi); background: var(--graph-dim); }
.ans .a-verdict { margin-left: auto; font-size: 10.5px; padding: 2px 9px; border-radius: 999px; }
.a-verdict.ok { color: var(--ok); background: var(--ok-dim); border: 1px solid rgba(52, 211, 153, 0.35); }
.a-verdict.bad { color: var(--bad); background: var(--bad-dim); border: 1px solid rgba(248, 113, 113, 0.35); }
.ans .a-body { padding: 14px; font-size: 14px; min-height: 62px; }
.ans .a-src { padding: 0 14px 12px; font-family: var(--mono); font-size: 10.5px; color: var(--faint); line-height: 1.7; }
.path-box { margin-top: 14px; border: 1px solid rgba(167, 139, 250, 0.3); background: var(--graph-dim); border-radius: 11px; padding: 13px 16px; }
.path-box .p-h { font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 1px; color: var(--graph-hi); text-transform: uppercase; margin-bottom: 8px; }
.path-step { font-family: var(--mono); font-size: 12px; color: var(--text); padding: 3px 0; }
.path-step .rel { color: var(--graph-hi); }
.chain-note { margin-top: 10px; font-size: 12px; color: var(--muted); font-style: italic; }

.wins { display: grid; gap: 12px; }
.win { border: 1px solid var(--border); border-left: 3px solid var(--ok); border-radius: var(--r); background: var(--bg-elev); padding: 16px 18px; }
.win .w-q { font-weight: 600; font-size: 14.5px; }
.win .w-row { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 8px; font-size: 12.5px; }
.win .w-van { color: var(--bad); }
.win .w-hyb { color: var(--ok); }
.win .w-path { margin-top: 9px; font-family: var(--mono); font-size: 11.5px; color: var(--graph-hi); line-height: 1.7; }

.method { max-width: 860px; }
.method ul { margin: 10px 0 10px 22px; color: var(--muted); font-size: 14px; }
.method li { margin: 6px 0; }
.method li b { color: var(--text); }
.method code { font-family: var(--mono); font-size: 12px; color: var(--graph-hi); background: var(--graph-dim); padding: 1px 6px; border-radius: 5px; }

footer { border-top: 1px solid var(--border); padding: 24px 0 32px; color: var(--faint); font-size: 12.5px; margin-top: 60px; }
.foot-in { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.foot-in .mono { font-family: var(--mono); font-size: 11px; }

@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.rise { animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.3, 1) both; }

@media (max-width: 900px) {
  .q-layout { grid-template-columns: 1fr; }
  .q-detail { position: static; }
  .answers { grid-template-columns: 1fr; }
  .scoreboard { grid-template-columns: 1fr; }
  .vs { display: none; }
}