@font-face{font-family:Prata;src:url(/fonts/Prata-Regular.woff2) format("woff2");font-display:swap}
@font-face{font-family:Jost;src:url(/fonts/Jost-Regular.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:Jost;src:url(/fonts/Jost-Medium.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
  --paper:#f6f1e4;
  --ink:#1c2145;
  --soft:#4d5272;
  --hair:rgba(28,33,69,.22);
  --faint:rgba(28,33,69,.07);
  --wash:rgba(28,33,69,.13);
}
*{box-sizing:border-box;margin:0}
[hidden]{display:none!important}
html,body{height:100%}
body{
  background:var(--paper);color:var(--ink);
  font:400 17px/1.45 Jost,system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  overscroll-behavior:none;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
button:focus-visible,a:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
h1,h2{font-family:Prata,Georgia,serif;font-weight:400}

/* Home */
.home{min-height:100dvh;max-width:640px;margin:0 auto;padding:clamp(28px,7vh,72px) 24px 32px;display:flex;flex-direction:column;gap:32px}
.home h1{font-size:clamp(52px,12vw,76px);line-height:1;letter-spacing:-.01em}
.lede{font-size:21px;line-height:1.35;margin-top:14px;max-width:30em}
.rule-list{list-style:none;padding:0;border-top:1px solid var(--hair)}
.rule-list li{padding:11px 0;border-bottom:1px solid var(--hair)}
.choices{display:flex;flex-direction:column;gap:10px}
.btn{display:block;width:100%;min-height:50px;padding:11px 18px;border:1px solid var(--ink);font-weight:500;text-align:center}
.btn:hover{background:var(--faint)}
.btn.solid{background:var(--ink);color:var(--paper)}
.btn.solid:hover{background:var(--soft)}
.levels{display:grid;grid-template-columns:auto 1fr 1fr 1fr;align-items:center;gap:8px}
.levels span{color:var(--soft);padding-right:8px}
.others{margin-top:auto;color:var(--soft);font-size:15px}
.others a{color:inherit}

/* Play */
.play{height:100dvh;display:grid;grid-template-rows:auto auto 1fr;justify-items:center;padding:10px 16px 14px;gap:10px}
.bar{width:100%;max-width:min(100%,calc(100dvh - 170px),720px);min-width:min(100%,320px);display:flex;justify-content:space-between;align-items:baseline}
.bar h2{font-size:24px}
.quiet{color:var(--soft);font-size:15px;min-height:44px;padding:0 4px}
.quiet:hover{color:var(--ink)}
.quiet:disabled{opacity:.35;cursor:default}
.stage{display:flex;align-items:flex-start;justify-content:center;width:100%;min-height:0}
.board{
  position:relative;width:min(100%,calc(100dvh - 170px),720px);aspect-ratio:1;
  display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);
  border:1px solid var(--ink);
}
.cell{position:relative;padding:0;border-right:1px solid var(--hair);border-bottom:1px solid var(--hair);overflow:visible;touch-action:manipulation}
.cell:nth-child(8n){border-right:0}
.cell:nth-child(n+57){border-bottom:0}
.cell.last{background:var(--faint)}
.cell.selected{background:rgba(28,33,69,.24)}
.cell.ordered{background:var(--wash)}
.cell.target::after{content:"";position:absolute;inset:39%;border-radius:50%;background:var(--ink)}
.cell.capture::after{content:"";position:absolute;inset:7%;border-radius:50%;border:2px solid var(--ink)}

/* Ground: the mark on each square is the rule */
.board-ground .cell::before{
  content:"";position:absolute;inset:32%;opacity:.3;
  background:
    linear-gradient(var(--ink),var(--ink)) center/100% 1.5px no-repeat,
    linear-gradient(var(--ink),var(--ink)) center/1.5px 100% no-repeat;
}
.board-ground .cell.diagonal::before{transform:rotate(45deg)}
.board-ground .cell.diagonal{background:rgba(28,33,69,.045)}
.board-ground .cell.diagonal.last{background:rgba(28,33,69,.11)}
.board-ground .cell.selected{background:rgba(28,33,69,.24)}

.piece{position:absolute;inset:14%;border-radius:50%;z-index:2;pointer-events:none}
.piece.p1{background:var(--ink)}
.piece.p2{background:var(--paper);border:2px solid var(--ink)}
.piece.marked::after{content:"";position:absolute;inset:30%;border-radius:50%}
.piece.p1.marked::after{background:var(--paper)}
.piece.p2.marked::after{background:var(--ink)}
.piece.frozen{box-shadow:0 0 0 2px var(--paper),0 0 0 3px var(--ink)}
.lines{position:absolute;inset:0;width:100%;height:100%;z-index:1;pointer-events:none}
.lines line{stroke:var(--ink);stroke-width:.014;opacity:.45}

.foot{width:min(100%,calc(100dvh - 170px),720px);min-width:min(100%,320px);display:flex;flex-direction:column;height:100%}
.foot .controls{margin-top:auto}
.status{min-height:2.9em;font-size:17px;line-height:1.35;margin-top:6px}
.controls{display:flex;justify-content:space-between;align-items:center;gap:4px}
.again{font-weight:500;color:var(--ink);text-decoration:underline;text-underline-offset:3px}
#count{color:var(--soft);font-size:15px;font-variant-numeric:tabular-nums}

dialog{margin:auto;width:min(92vw,520px);max-height:88dvh;padding:26px;background:var(--paper);color:var(--ink);border:1px solid var(--ink)}
dialog::backdrop{background:rgba(28,33,69,.35)}
dialog h2{font-size:30px;margin-bottom:14px}
dialog .btn{margin-top:18px}

@media (min-width:900px) and (min-height:620px){
  .play{padding-top:18px}
}
@media (max-height:520px) and (orientation:landscape){
  .play{grid-template-columns:auto minmax(180px,1fr);grid-template-rows:auto 1fr;column-gap:20px;justify-items:stretch;padding-bottom:8px}
  .bar{grid-column:2;grid-row:1;max-width:none;min-width:0}
  .stage{grid-column:1;grid-row:1/3}
  .board{width:calc(100dvh - 18px)}
  .foot{grid-column:2;grid-row:2;width:auto;min-width:0}
}

/* Colony: show what the last placement checked, what was born and what was crowded out */
.board-colony .cell.checked{background:var(--faint)}
.board-colony .cell.last{background:rgba(28,33,69,.13)}
.board-colony .cell.born .piece{animation:born .5s ease-out}
.board-colony .cell.died::after{content:"";position:absolute;inset:14%;border-radius:50%;border:1.5px dashed var(--ink);opacity:.45}
@keyframes born{from{transform:scale(.3);opacity:0}to{transform:scale(1);opacity:1}}
@media (prefers-reduced-motion:reduce){.board-colony .cell.born .piece{animation:none}}