:root {
  --bg: #f7f8fa; --surface: #fff; --text: #14181f; --muted: #556070; --border: #d5dae2;
  --accent: #1d4ed8; --pass: #0f6b2f; --note: #8a5a00; --fail: #b3261e;
  --pass-bg: #e3f4e8; --note-bg: #fbf0d4; --fail-bg: #fbe3e1;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218; --surface: #181d26; --text: #e8ecf2; --muted: #9aa5b5; --border: #2c3442;
    --accent: #7aa2ff; --pass: #6fd48f; --note: #f0c15a; --fail: #ff8f86;
    --pass-bg: #12301d; --note-bg: #382c0d; --fail-bg: #3b1714;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, sans-serif; }
a { color: var(--accent); }
.site { padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface); }
.brand { font-weight: 700; text-decoration: none; color: var(--text); }
main { max-width: 960px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.4rem; margin: 8px 0 16px; }
form { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; align-items: end; }
label { display: grid; gap: 4px; font-size: 0.85rem; color: var(--muted); }
select, input, button { font: inherit; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); min-height: 40px; }
button { background: var(--accent); color: #fff; border-color: var(--accent); cursor: pointer; font-weight: 600; }
@media (prefers-color-scheme: dark) { button { color: #0f1218; } }
button:disabled { opacity: 0.6; cursor: default; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
#status { color: var(--muted); }
#status.error, .error { color: var(--fail); }
#results { display: grid; gap: 12px; }
.build { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; }
.build header { display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; }
.build h3 { margin: 0; font-size: 1.05rem; flex: 1 1 14rem; }
.rank { font-weight: 700; color: var(--muted); }
.speed { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: baseline; }
.speed .num { font-size: 1.25rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.est { color: var(--muted); font-size: 0.8rem; }
.badge { font-size: 0.75rem; padding: 1px 8px; border-radius: 99px; border: 1px solid var(--border); }
.badge.tier { display: inline-block; margin-left: 8px; font-weight: 400; font-size: 0.75rem; color: var(--note); border-color: var(--note); vertical-align: middle; }
.check-label { display: flex; align-items: center; gap: 8px; min-height: 40px; }
.check-label input { min-height: 0; width: 18px; height: 18px; margin: 0; }
.tier-section { display: grid; gap: 12px; margin-top: 24px; }
.tier-section h2 { margin: 0; font-size: 1.15rem; }
.tier-intro { margin: 0; color: var(--muted); }
.notes { margin: 8px 0; padding-left: 18px; color: var(--muted); font-size: 0.9rem; }
.buy { font-weight: 600; }
.src-benchmark { border-color: var(--pass); color: var(--pass); }
.src-formula { border-color: var(--note); color: var(--note); }
.vram { margin: 4px 0; font-variant-numeric: tabular-nums; }
.parts { display: grid; grid-template-columns: max-content 1fr; gap: 2px 12px; margin: 8px 0; }
.parts dt { color: var(--muted); } .parts dd { margin: 0; overflow-wrap: anywhere; }
.checks { list-style: none; padding: 0; margin: 8px 0; display: grid; gap: 4px; }
.check { display: grid; grid-template-columns: 4rem 7rem 1fr; gap: 8px; align-items: baseline; font-size: 0.9rem; }
.status { font-weight: 700; text-align: center; border-radius: 4px; padding: 0 4px; }
.pass .status { color: var(--pass); background: var(--pass-bg); }
.note .status { color: var(--note); background: var(--note-bg); }
.fail .status { color: var(--fail); background: var(--fail-bg); }
.reason { color: var(--muted); overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.saved { overflow-wrap: anywhere; }
footer { max-width: 960px; margin: 24px auto; padding: 0 16px; color: var(--muted); font-size: 0.85rem; }
@media (max-width: 560px) { .check { grid-template-columns: 3.5rem 1fr; } .check .reason { grid-column: 1 / -1; } }