:root {
  --bg: #0e141b; --panel: #151d27; --panel-2: #1b2632; --line: #263445;
  --text: #e7ecf2; --muted: #93a1b3; --accent: #7fd0ff; --accent-2: #4aa8e0; --ok: #7bd88f; --bad: #ff8a80;
  --sq-light: #dfe6ee; --sq-dark: #7f97b2;
  --radius: 12px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f6f9; --panel: #ffffff; --panel-2: #eef2f6; --line: #d6dde6;
    --text: #17202b; --muted: #58677a; --accent: #0b6fb0; --accent-2: #085a91; --ok: #1f8a3b; --bad: #c0392b;
    --sq-light: #e8edf3; --sq-dark: #86a0bd;
    color-scheme: light;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); background: var(--panel); }
header.site .wrap { display: flex; align-items: center; gap: 20px; min-height: 56px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand:hover { text-decoration: none; }
.brand .knight { color: var(--accent); font-size: 1.5rem; line-height: 1; }
nav.site { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
nav.site a { color: var(--muted); padding: 6px 12px; border-radius: 8px; }
nav.site a:hover { color: var(--text); background: var(--panel-2); text-decoration: none; }
nav.site a.current { color: var(--text); background: var(--panel-2); }
footer.site { border-top: 1px solid var(--line); margin-top: 64px; padding: 24px 0 40px; color: var(--muted); font-size: .9rem; }
footer.site .wrap { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #06121c; }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }

/* landing page */
.hero { padding: 56px 0 32px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; }
@media (max-width: 800px) { .hero { grid-template-columns: 1fr; padding-top: 32px; } }
.hero h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); line-height: 1.1; margin: 0 0 12px; letter-spacing: -.02em; }
.hero h1 .accent { color: var(--accent); }
.hero p.lead { font-size: 1.15rem; color: var(--muted); margin: 16px 0 24px; max-width: 34em; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .art { display: flex; justify-content: center; }
.hero .art .board-preview { width: min(100%, 340px); aspect-ratio: 1; border-radius: 10px; overflow: hidden; box-shadow: 0 16px 50px rgba(0,0,0,.4);
  display: grid; grid-template-columns: repeat(8, 1fr); grid-template-rows: repeat(8, 1fr); border: 1px solid var(--line); container-type: inline-size; }
.board-preview span { display: flex; align-items: center; justify-content: center; min-height: 0; overflow: hidden; font-size: 11.5cqw; line-height: 1; font-family: "Segoe UI Symbol", "Noto Sans Symbols 2", "Apple Symbols", "DejaVu Sans", serif; }
.board-preview .l { background: var(--sq-light); } .board-preview .d { background: var(--sq-dark); }
.board-preview .w { color: #fdfdfb; -webkit-text-stroke: 1px #1b1f24; paint-order: stroke fill; }
.board-preview .b { color: #1a1d21; -webkit-text-stroke: .8px #c9d2dc; paint-order: stroke fill; }

section.block { margin-top: 56px; }
section.block h2 { font-size: 1.5rem; margin: 0 0 6px; letter-spacing: -.01em; }
section.block > p { color: var(--muted); margin: 0 0 20px; max-width: 46em; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }

table.results { border-collapse: collapse; width: 100%; max-width: 640px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
table.results th, table.results td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line); }
table.results th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; background: var(--panel-2); }
table.results tr:last-child td { border-bottom: 0; }
table.results td.num { font-variant-numeric: tabular-nums; }
.fine { color: var(--muted); font-size: .85rem; margin-top: 14px; max-width: 46em; }

.downloads { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.dl { display: flex; flex-direction: column; gap: 2px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: var(--text); }
.dl:hover { border-color: var(--accent); text-decoration: none; }
.dl strong { font-size: 1rem; }
.dl span { color: var(--muted); font-size: .85rem; }
code { background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: .9em; }
pre { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; overflow-x: auto; }
pre code { background: none; border: 0; padding: 0; }