[hidden] { display: none !important; } /* the display rules below must not override the hidden attribute */
/* Layout: board as the hero on the left, a narrow control rail on the right; stacks on phones. Palette drawn from Horezu pottery: slip, cobalt, ochre, glaze green. */
:root {
  --bg: #eceef0;
  --surface: #f8f8f6;
  --fg: #1c2230;
  --muted: #5b6373;
  --line: #d3d7de;
  --accent: #2b4f9e;        /* cobalt */
  --ochre: #c18a25;         /* decoration only (band): 2.85:1 on --surface, never text or a focus ring */
  --ochre-text: #8a5f0f;    /* 5.30:1 on --surface (#f8f8f6) */
  --focus-sq: #f5eddc;      /* 5.58:1 on the dark square --sq-dark (#4d6448) */
  --capture: #b3322b;
  --sq-dark: #4d6448;       /* glaze green */
  --frame: #2f3a2c;
  --frame-text: #d9ccab;
  --mark-x: #f5eddc;        /* cream cross on the green squares: 5.58:1 on --sq-dark */
  --mark-o: #e0a940;        /* ochre nought on the green squares */
  --sq-hover: #587350;
  --sq-win: #3b4f37;
  --font-display: "Alegreya SC", "Palatino Linotype", Palatino, Georgia, serif;
  --font-body: "Alegreya Sans", "Gill Sans", "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171d; --surface: #1c2028; --fg: #e6e8ec; --muted: #9aa2b1; --line: #2e3440;
    --accent: #7f9ee6; --ochre: #e0a940; --ochre-text: #e0a940; --focus-sq: #f5eddc; --capture: #ec6a5f;
    --sq-dark: #3c5038; --sq-hover: #4a6444; --sq-win: #2c3d29; --frame: #0d100c; --frame-text: #b9ac8c;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14171d; --surface: #1c2028; --fg: #e6e8ec; --muted: #9aa2b1; --line: #2e3440;
  --accent: #7f9ee6; --ochre: #e0a940; --ochre-text: #e0a940; --focus-sq: #f5eddc; --capture: #ec6a5f;
  --sq-dark: #3c5038; --sq-hover: #4a6444; --sq-win: #2c3d29; --frame: #0d100c; --frame-text: #b9ac8c;
  color-scheme: dark;
}
html, body { background: var(--bg); color: var(--fg); }
body {
  font-family: var(--font-body); font-size: 16px; line-height: 1.45;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 20px 32px;
}
.wrap { max-width: 1040px; margin: 0 auto; display: grid; gap: 20px; }
header h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(28px, 5vw, 40px); margin: 0; letter-spacing: 0.02em; line-height: 1.1; text-wrap: balance; }
header p { margin: 4px 0 0; color: var(--muted); }
.band { height: 10px; border-radius: 2px; opacity: .9;
  background:
    repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 12px) top/100% 5px no-repeat,
    repeating-linear-gradient(90deg, transparent 0 6px, var(--ochre) 6px 12px) bottom/100% 5px no-repeat; }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; }
@media (max-width: 820px) { .layout { grid-template-columns: minmax(0, 1fr); } }

/* Board */
.board-frame { background: var(--frame); padding: 14px; border-radius: 6px; max-width: 520px; width: 100%; margin: 0 auto; box-sizing: border-box; }
.board { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-template-rows: repeat(3, minmax(0, 1fr)); gap: 8px; aspect-ratio: 1; max-width: 100%; }
.sq { border: 0; padding: 0; margin: 0; min-width: 0; min-height: 0; position: relative; display: grid; place-items: center; background: var(--sq-dark); border-radius: 4px; cursor: pointer; font: inherit; }
.sq[aria-disabled="true"] { cursor: default; }
.sq:focus-visible { outline: 3px solid var(--focus-sq); outline-offset: -4px; z-index: 2; }
.sq .mk { width: 62%; height: auto; aspect-ratio: 1; }
.sq.last { box-shadow: inset 0 0 0 3px #e0a94066; }
.sq.win { box-shadow: inset 0 0 0 4px var(--focus-sq); background: var(--sq-win); }
.sq:not([aria-disabled="true"]):hover { background: var(--sq-hover); }
.mk.x { color: var(--mark-x); }
.mk.o { color: var(--mark-o); }
.status .mk, .tally .mk, .log .mk { width: 22px; height: 22px; flex: none; background: var(--sq-dark); border-radius: 4px; }
.tally .mk:not(.x):not(.o) { background: none; }

/* Rail */
.rail { display: grid; gap: 16px; min-width: 0; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; display: grid; gap: 10px; }
.label { font-size: 12px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); font-weight: 700; }
.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button { font: inherit; font-size: 14px; border: 0; padding: 7px 6px; background: transparent; color: var(--fg); cursor: pointer; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--surface); font-weight: 700; }
.seg button:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn { font: inherit; font-size: 14px; font-weight: 500; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--surface); color: var(--fg); cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--surface); font-weight: 700; }
.btn:disabled { opacity: .45; cursor: default; }

.status { font-family: var(--font-display); font-size: 22px; line-height: 1.2; display: flex; align-items: center; gap: 10px; text-wrap: balance; }
.hint { color: var(--muted); font-size: 14px; margin: 0; }
.status.win { color: var(--ochre-text); }

.tally { display: grid; gap: 6px; }
.tally div { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.tally b { margin-left: auto; font-variant-numeric: tabular-nums; }

.log { max-height: 180px; overflow-y: auto; font-variant-numeric: tabular-nums; font-size: 14px; margin: 0; padding: 0; list-style: none; display: grid; gap: 4px; }
.log li { display: flex; align-items: center; gap: 8px; }
.log .n { color: var(--muted); min-width: 2em; }
.empty { color: var(--muted); font-size: 14px; }

details.rules summary { cursor: pointer; font-weight: 700; padding-block: 6px; }
details.rules ul { margin: 8px 0 0; padding-left: 18px; font-size: 14px; display: grid; gap: 4px; }
.legend { display: flex; gap: 12px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 50%; }
/* Site chrome shared by every page: skip link, footer, document pages */
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 8px; top: -60px; z-index: 10; background: var(--surface); color: var(--fg); padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); }
.skip-link:focus { top: 8px; }
a { color: var(--accent); }
header .brand { margin: 0; font-family: var(--font-display); font-weight: 700; font-size: clamp(22px, 4vw, 28px); letter-spacing: 0.02em; color: var(--fg); }
header .brand a { color: inherit; text-decoration: none; }
header .brand a:hover, header .brand a:focus-visible { text-decoration: underline; }
footer.site { border-top: 1px solid var(--line); padding-top: 16px; display: grid; gap: 8px; font-size: 14px; color: var(--muted); }
footer.site nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px 18px; flex-wrap: wrap; }
footer.site p { margin: 0; }
main.doc { display: grid; gap: 14px; max-width: 720px; }
main.doc h1 { font-family: var(--font-display); font-size: clamp(28px, 5vw, 40px); margin: 0; line-height: 1.1; }
main.doc h2 { font-family: var(--font-display); font-size: 24px; margin: 18px 0 0; }
main.doc h3 { font-size: 18px; margin: 10px 0 0; }
main.doc p, main.doc ul, main.doc ol { margin: 0; }
main.doc ul, main.doc ol { padding-left: 22px; display: grid; gap: 6px; }
main.doc code { font-size: .92em; background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }
.lede { color: var(--muted); font-size: 18px; }
.build-number { font-weight: 700; }
.changelog { list-style: none; padding: 0 !important; display: grid; gap: 16px !important; }
.changelog li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; display: grid; gap: 6px; }
.changelog-meta { display: flex; gap: 6px 14px; flex-wrap: wrap; font-size: 14px; color: var(--muted); }
.changelog-build { font-weight: 700; color: var(--fg); font-variant-numeric: tabular-nums; }