/* DisChess. Two surfaces: tournament felt and scoresheet paper. One
   accent, the board's own last-move yellow, used only for "this just
   happened" and the main action. */
:root {
  --felt: #1d3a2c;
  --felt-2: #244634;
  --felt-line: #36584a;
  --on-felt: #e9ede3;
  --on-felt-2: #b9c7b8;
  --paper: #e9ede3;
  --paper-2: #dde3d5;
  --rule: #c5cdbd;
  --ink: #172019;
  --ink-2: #4a564c;
  --sq-light: #eeeed2;
  --sq-dark: #769656;
  --mark: #f2e35c;
  --line: #3f6b4f;
  --good: #2f7d4f;
  --bad: #b3412f;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Outfit", system-ui, sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
  --max: 1180px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16211a; --paper-2: #1c2a21; --rule: #2e4034;
    --ink: #e3e8dc; --ink-2: #a7b3a6;
    --felt: #10241a; --felt-2: #163022; --felt-line: #2a4a3a;
    --line: #9fce8f; --good: #7fcf95; --bad: #f08a76;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16211a; --paper-2: #1c2a21; --rule: #2e4034;
  --ink: #e3e8dc; --ink-2: #a7b3a6;
  --felt: #10241a; --felt-2: #163022; --felt-line: #2a4a3a;
  --line: #9fce8f; --good: #7fcf95; --bad: #f08a76;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 var(--body); overflow-x: hidden; }
img, svg { max-width: 100%; display: block; }
figure { margin: 0; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--mark); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1; margin: 0 0 .4em; letter-spacing: -.01em; }
h1 { font-size: clamp(44px, 7vw, 78px); }
h2 { font-size: clamp(32px, 4.2vw, 48px); }
h3 { font-size: 26px; font-weight: 600; }
p { margin: 0 0 1em; max-width: 64ch; }
code { font: 600 .95em var(--body); background: var(--felt-2); color: var(--on-felt); padding: .1em .45em; border-radius: 5px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--mark); color: #172019; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.ic { display: inline-block; width: 20px; height: 20px; vertical-align: -4px; margin-right: 6px; }

/* ---- surfaces */
.felt { background: var(--felt); color: var(--on-felt); }
.felt p { color: var(--on-felt-2); }
/* Every section is full bleed with its content in one centred column: the
   side padding grows so grid and flow sections line up alike. */
.felt, .paper { padding: clamp(48px, 7vw, 96px) max(var(--gutter), calc((100% - var(--max)) / 2)); }
.sec-lede { color: var(--ink-2); font-size: 19px; }

/* ---- bar */
.bar { display: flex; align-items: center; gap: 24px; padding: 14px var(--gutter); background: var(--felt); color: var(--on-felt); border-bottom: 1px solid var(--felt-line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 24px/1 var(--display); }
.brand img { border-radius: 8px; }
.bar nav { display: flex; gap: 22px; margin-left: auto; }
.bar nav a { text-decoration: none; color: var(--on-felt-2); font-weight: 500; }
.bar nav a:hover, .bar nav a[aria-current] { color: var(--on-felt); text-decoration: underline; }

/* ---- buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 8px; border: 0;
  font: 700 21px/1 var(--display); letter-spacing: .01em; text-decoration: none; cursor: pointer; background: var(--felt-2); color: var(--on-felt); }
.btn.small { min-height: 40px; font-size: 18px; padding: 0 16px; }
.btn.primary { background: var(--mark); color: #172019; }
.btn.primary:hover { background: #fff07a; }
.btn.ghost { background: transparent; color: var(--on-felt); box-shadow: inset 0 0 0 2px var(--on-felt-2); }
.btn.ghost:hover { box-shadow: inset 0 0 0 2px var(--on-felt); }
.btn.ghost-ink { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--rule); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 0; }

/* ---- hero: a real game playing itself beside its scoresheet */
.hero { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.3fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero-copy { max-width: 520px; }
.hero h1 { font-size: clamp(52px, 7.4vw, 96px); line-height: .92; }
.lede { font-size: 20px; margin-top: 20px; }
.hero-stats { font-size: 15px; margin-top: 28px; }
.hero-alt { margin: 14px 0 0; font-size: 16px; }
.hero-alt a { color: var(--on-felt); }
.hero-game { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 0; max-width: 760px; justify-self: end; width: 100%; }
.board { aspect-ratio: 1; }
.board img, .board svg { width: 100%; height: auto; border-radius: 10px; }
.board .coords { font: 500 14px var(--body); }

/* The scoresheet: ruled paper, move numbers down the side. */
.sheet { background: var(--paper); color: var(--ink); border-radius: 0 10px 10px 0; padding: 14px 14px 10px; display: flex; flex-direction: column; min-height: 0; }
/* The sheet takes the board's height, never its own: contain:size keeps its
   long move list from stretching the row. */
.hero .sheet { margin: 14px 0; contain: size; }
.hero .sheet-head, .hero .sheet-foot { color: var(--ink); }
.hero .sheet-foot { color: var(--ink-2); }
.sheet-head { display: flex; flex-direction: column; gap: 2px; font-size: 14px; font-weight: 600; margin: 0 0 8px; color: var(--ink); }
.sheet-head span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sheet-scroll { overflow-y: auto; flex: 1; min-height: 0; scroll-behavior: smooth; }

.sheet-table { width: 100%; border-collapse: collapse; font: 500 15px/1 var(--body); font-variant-numeric: tabular-nums; }
.sheet-table th { width: 2.2em; text-align: right; padding: 0 8px 0 0; font: 600 16px var(--display); color: var(--ink-2); }
.sheet-table td { padding: 0; border-bottom: 1px solid var(--rule); height: 30px; }
.sheet-table td[data-ply] { color: transparent; padding-left: 6px; transition: color .2s; }
.sheet-table td.played { color: var(--ink); }
.sheet-table td.now, .sheet-table button.now { background: var(--mark); color: #172019; border-radius: 3px; }
.sheet-table button { all: unset; box-sizing: border-box; width: 100%; height: 30px; padding-left: 6px; cursor: pointer; }
.sheet-table button:hover { background: var(--paper-2); }
.sheet-table button:focus-visible { outline: 2px solid var(--line); }
.sheet-foot { font-size: 13px; color: var(--ink-2) !important; margin: 8px 0 0; }

/* ---- one move, start to finish: a real sequence, so it is numbered */
.steps-sec h2 { margin-bottom: 36px; }
.steps { list-style: none; counter-reset: step; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); }
.steps li { counter-increment: step; }
.steps img { width: 100%; height: auto; border-radius: 10px; margin-bottom: 18px; }
.steps h3::before { content: counter(step); display: inline-grid; place-items: center; width: 34px; height: 34px; margin-right: 10px; border-radius: 50%;
  background: var(--line); color: var(--paper); font-size: 20px; vertical-align: 3px; }
.steps p { color: var(--ink-2); }

/* ---- the ladder: rungs, top bot first */
.ladder-sec { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: clamp(32px, 5vw, 72px); align-items: start; }

.ladder-intro { position: sticky; top: 24px; }
.ladder { list-style: none; padding: 0; position: relative; }
.ladder::before, .ladder::after { content: ""; position: absolute; top: 0; bottom: 0; width: 6px; border-radius: 3px; background: var(--felt-line); }
.ladder::before { left: 86px; } .ladder::after { right: 0; }
.rung { display: grid; grid-template-columns: 72px 1fr; gap: 40px; align-items: start; padding: 18px 20px 18px 0; position: relative; }
.rung::before { content: ""; position: absolute; left: 86px; right: 0; top: 34px; height: 6px; background: var(--felt-line); border-radius: 3px; }
.rung-rating { font: 700 40px/1 var(--display); text-align: right; font-variant-numeric: tabular-nums; }
.rung-body { position: relative; background: var(--felt); padding: 0 12px 0 14px; margin-left: 4px; }
.rung-body h3 { margin: 0 0 4px; display: inline-block; background: var(--felt); padding-right: 10px; }
.rung-body p { margin: 0; font-size: 16px; }
.rung-rec { font-size: 14px !important; margin-top: 4px !important; opacity: .85; }

/* ---- leagues on a real rating axis */
.axis { list-style: none; padding: 0; margin-top: 40px; display: flex; }
.seg { flex: var(--w) 1 0; min-width: 0; padding: 14px 12px; display: flex; flex-direction: column; gap: 2px; color: #172019; }
.seg.light { background: var(--sq-light); } .seg.dark { background: var(--sq-dark); }
.seg:first-child { border-radius: 10px 0 0 10px; } .seg:last-child { border-radius: 0 10px 10px 0; }
.seg-ic { width: 40px; height: 40px; margin-bottom: 6px; }
.seg-name { font: 700 22px/1.05 var(--display); }
.seg-min { font: 600 18px var(--display); font-variant-numeric: tabular-nums; }
.seg-count { font-size: 14px; }

/* ---- crosstables */
.now-sec { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 5vw, 72px); border-top: 1px solid var(--rule); }
.xt { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.xt th { text-align: left; font: 600 16px var(--display); color: var(--ink-2); padding: 8px 10px; border-bottom: 2px solid var(--ink); }
.xt td { padding: 10px; border-bottom: 1px solid var(--rule); }
.xt .pos { width: 3em; font: 700 22px var(--display); color: var(--ink-2); }
.xt .who a { font-weight: 600; text-decoration: none; }
.xt .who a:hover { text-decoration: underline; }
.xt .num { text-align: right; }
.xt td.num { font: 700 22px var(--display); }
.xt.big .num.wdl, .xt .wdl { font: 500 16px var(--body); color: var(--ink-2); }
.xt.games td { font-size: 16px; white-space: nowrap; }
.tag { font: 600 12px/1 var(--body); padding: 3px 6px; border-radius: 4px; margin-left: 8px; background: var(--line); color: var(--paper); vertical-align: 2px; }
.felt .tag { background: var(--felt-line); color: var(--on-felt); }
.tag.soft { background: var(--paper-2); color: var(--ink-2); }
.more { display: inline-block; margin-top: 16px; font-weight: 600; }
.note, .empty { color: var(--ink-2); font-size: 15px; margin-top: 14px; }
.scroll-x { overflow-x: auto; position: relative; }

/* ---- commands */
.cmds { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 48px; margin: 28px 0 36px; }
.cmds div { display: grid; grid-template-columns: 11em 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--felt-line); }
.cmds dt code { background: var(--felt-2); }
.cmds dd { margin: 0; color: var(--on-felt-2); }

/* ---- pages */
.page-head h1 { margin-bottom: 12px; }
.tabs { display: flex; gap: 8px; margin: 24px 0 20px; }
.tabs a { text-decoration: none; font: 700 20px var(--display); padding: 8px 16px; border-radius: 8px; color: var(--ink-2); }
.tabs a[aria-current] { background: var(--felt); color: var(--on-felt); }

.player-head { display: grid; grid-template-columns: auto 1fr; gap: 12px 28px; align-items: center; }

.player-piece { width: 96px; height: 96px; }
.player-id h1 { margin: 0 0 6px; overflow-wrap: anywhere; }
.player-id p { margin: 0; }
.player-nums { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 12px 44px; margin: 24px 0 0; }
.player-nums dt { font-size: 14px; color: var(--on-felt-2); }
.player-nums dd { margin: 0; font: 700 36px/1.05 var(--display); font-variant-numeric: tabular-nums; }
.player-nums .rating dd { font-size: 64px; color: var(--mark); }
.out { font-weight: 600; }
.out.win { color: var(--good); } .out.loss { color: var(--bad); }
.reason { color: var(--ink-2); }

.chart { position: relative; margin: 20px 0 0; max-width: 820px; }
.chart svg { width: 100%; height: auto; overflow: visible; }
.chart .grid line { stroke: var(--rule); stroke-width: 1; }
.chart .grid text, .chart .axis-x { fill: var(--ink-2); font: 500 12px var(--body); }
.chart .line { fill: none; stroke: var(--line); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .end { fill: var(--line); stroke: var(--paper); stroke-width: 2; }
.chart .end-label { fill: var(--ink); font: 700 16px var(--display); }
.chart .cross { stroke: var(--ink-2); stroke-width: 1; stroke-dasharray: 3 3; }
.chart .hover circle { fill: var(--line); stroke: var(--paper); stroke-width: 2; }
.chart .tip { position: absolute; background: var(--ink); color: var(--paper); padding: 6px 10px; border-radius: 6px; font-size: 14px; pointer-events: none; white-space: nowrap; }
.chart .tip b { font: 700 18px var(--display); }

.game-sec, .puzzle-sec { display: grid; grid-template-columns: minmax(0, 560px) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }

.game-board { position: relative; }
.controls { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 14px; }
.controls button { display: grid; place-items: center; width: 48px; height: 44px; border: 0; border-radius: 8px; background: var(--felt); color: var(--on-felt); cursor: pointer; }
.controls button:hover { background: var(--felt-2); }
.controls .ply { min-width: 8.5em; text-align: center; font-size: 15px; color: var(--ink-2); }
.game-sheet { border-radius: 10px; background: var(--paper-2); padding: 20px; max-height: 720px; }
.game-sheet h1 { font-size: 44px; }
.sheet-head.column { font-size: 16px; gap: 6px; }
.game-status { font: 700 24px/1.1 var(--display); margin: 10px 0 4px; }
.dim { color: var(--ink-2); font-weight: 400; }
.game-sheet .sheet-scroll { margin-top: 12px; max-height: 360px; }
.game-links { display: flex; gap: 20px; margin: 14px 0 0; font-weight: 600; }

.puzzle-panel h1 { font-size: clamp(44px, 5vw, 64px); }
.task { font-size: 20px; font-weight: 500; }
.task .ic { width: 26px; height: 26px; vertical-align: -6px; }
.status { min-height: 3.2em; font-size: 18px; padding: 12px 14px; border-radius: 8px; background: var(--paper-2); }
.status[data-tone="good"] { box-shadow: inset 4px 0 0 var(--good); }
.status[data-tone="bad"] { box-shadow: inset 4px 0 0 var(--bad); }
.streak { font: 700 22px var(--display); }
.type-move { margin-top: 20px; }
.type-move label { display: block; font-size: 15px; color: var(--ink-2); margin-bottom: 6px; }
.type-move div { display: flex; gap: 8px; }
.type-move input { flex: 1; min-width: 0; max-width: 220px; min-height: 40px; padding: 0 12px; border-radius: 8px; border: 2px solid var(--rule); background: var(--paper); color: var(--ink); font: 500 18px var(--body); }
.puzzle-done .type-move, .puzzle-done #reveal { display: none; }
.puzzle-done .next { background: var(--mark); color: #172019; }
.promo { position: absolute; inset: auto 0 16px 0; margin: auto; width: max-content; display: flex; gap: 6px; padding: 8px; border-radius: 10px; background: var(--ink); }
.promo button { border: 0; background: var(--paper); border-radius: 6px; padding: 6px; cursor: pointer; font: 600 15px var(--body); }
.promo-ic { width: 44px; height: 44px; }
.promo-x { padding: 0 12px !important; }

.prose > * { max-width: 68ch; }
.prose p { color: var(--ink-2); }

/* ---- footer */
.foot { background: var(--felt); color: var(--on-felt-2); padding: 36px var(--gutter); display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; border-top: 1px solid var(--felt-line); }
.foot p { margin: 0; font-size: 15px; }
.foot-brand { display: flex; align-items: center; gap: 10px; color: var(--on-felt); font: 700 20px var(--display); }
.foot-brand img { border-radius: 6px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; font-size: 15px; }

.closed-main { min-height: 100vh; display: grid; place-content: center; text-align: center; justify-items: center; }
.closed-main img { border-radius: 14px; margin-bottom: 20px; }

/* ---- narrow screens */
@media (max-width: 960px) {
  .hero, .ladder-sec, .game-sec, .puzzle-sec { grid-template-columns: minmax(0, 1fr); }
  .hero-copy { justify-self: start; }
  .hero-game { justify-self: stretch; }
  .ladder-intro { position: static; }
  .now-sec { grid-template-columns: minmax(0, 1fr); }
  .cmds { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .bar { gap: 12px; flex-wrap: wrap; }
  .bar nav { order: 3; width: 100%; margin: 0; gap: 18px; }
  .bar .btn { margin-left: auto; }
  .hero-game { grid-template-columns: minmax(0, 1fr); }
  .hero .sheet { margin: 0; border-radius: 0 0 10px 10px; contain: none; }
  .hero .sheet-scroll { max-height: 150px; }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .axis { flex-direction: column; }
  .seg { flex: none; flex-direction: row; align-items: center; gap: 12px; }
  .seg:first-child { border-radius: 10px 10px 0 0; } .seg:last-child { border-radius: 0 0 10px 10px; }
  .seg-ic { margin: 0; width: 32px; height: 32px; }
  .seg-count { margin-left: auto; }
  .ladder::before { left: 66px; }
  .rung { grid-template-columns: 52px 1fr; gap: 30px; }
  .rung::before { left: 66px; }
  .rung-rating { font-size: 30px; }
  .cmds div { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .xt .wdl { display: none; }
  .player-nums .rating dd { font-size: 52px; }
  /* The chart scales down with the screen; its text should not. */
  .chart .grid text, .chart .axis-x { font-size: 22px; }
  .chart .end-label { font-size: 28px; }
  .chart .line { stroke-width: 3.5; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}