@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);
  --n:7;
  --size:min(100%,calc(100dvh - 190px),620px);
}
*{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;user-select:none;-webkit-user-select:none;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
button:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
h1,h2{font-family:Prata,Georgia,serif;font-weight:400}

.play{height:100dvh;display:grid;grid-template-rows:auto auto 1fr;justify-items:center;padding:14px 16px 14px;gap:12px;touch-action:none}
.bar,.foot{width:var(--size);min-width:min(100%,300px)}
.bar{display:flex;justify-content:space-between;align-items:baseline}
.bar h1{font-size:30px;line-height:1}
.score{display:flex;align-items:baseline;gap:14px;font-variant-numeric:tabular-nums}
#score{font-size:28px;font-weight:500;line-height:1}
.best{color:var(--soft);font-size:15px}
.stage{display:flex;justify-content:center;width:100%}

.board{
  position:relative;width:var(--size);aspect-ratio:1;border:1px solid var(--ink);
  background:
    linear-gradient(90deg,var(--hair) 1px,transparent 1px) 0 0/calc(100%/var(--n)) 100%,
    linear-gradient(var(--hair) 1px,transparent 1px) 0 0/100% calc(100%/var(--n));
  overflow:hidden;
}
.board.over .echo:not(.caught),.board.over .spark,.board.over .birth{opacity:.35}
.cell-hit{position:absolute;width:calc(100%/var(--n));height:calc(100%/var(--n));background:none;padding:0}
.cell-hit:focus,.cell-hit:focus-visible{outline:none}

/* Everything on the board is one square, moved by transform. */
.tok{
  position:absolute;left:0;top:0;width:calc(100%/var(--n));height:calc(100%/var(--n));
  transform:translate(calc(var(--x)*100%),calc(var(--y)*100%));
  transition:transform .14s ease-out,opacity .2s;pointer-events:none;
}
.tok::before{content:"";position:absolute;border-radius:50%}
.you{z-index:3}
.you::before{inset:18%;background:var(--ink)}
.echo{z-index:2}
.echo::before{inset:22%;border:2px solid var(--ink);background:var(--paper)}
.tick{position:absolute;inset:0;transform:rotate(var(--r))}
.tick::after{content:"";position:absolute;left:calc(50% - 1.25px);top:6%;width:2.5px;height:16%;background:var(--ink)}
.spark{z-index:1}
.spark::before{inset:38%;border-radius:0;background:var(--ink);transform:rotate(45deg)}
.birth::before{inset:22%;border:1.5px dashed var(--soft)}
.new{animation:arrive .26s ease-out}
.echo.caught{z-index:4}
.echo.caught::before{inset:6%;background:none;border-width:3px}
@keyframes arrive{from{opacity:0;scale:.4}}

.foot{display:flex;flex-direction:column;height:100%}
.status{min-height:2.9em;line-height:1.35}
.controls{margin-top:auto;display:flex;justify-content:space-between;align-items:center}
.quiet{color:var(--soft);font-size:15px;min-height:44px;padding:0 4px}
.quiet:hover{color:var(--ink)}
.again{font-weight:500;color:var(--ink);text-decoration:underline;text-underline-offset:3px}

dialog{margin:auto;width:min(92vw,500px);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:34px;line-height:1}
.lede{font-size:19px;margin:8px 0 16px}
.rule-list{padding:0 0 0 1.2em;border-top:1px solid var(--hair)}
.rule-list li{padding:9px 0 9px 4px;border-bottom:1px solid var(--hair)}
.btn{display:block;width:100%;min-height:50px;margin-top:18px;border:1px solid var(--ink);background:var(--ink);color:var(--paper);font-weight:500}
.btn:hover{background:var(--soft)}

@media (prefers-reduced-motion:reduce){.tok{transition:none}.new{animation:none}}
@media (max-height:520px) and (orientation:landscape){
  .play{grid-template-columns:auto minmax(180px,1fr);grid-template-rows:auto 1fr;column-gap:24px;justify-items:stretch}
  :root{--size:calc(100dvh - 28px)}
  .stage{grid-column:1;grid-row:1/3}
  .bar,.foot{grid-column:2;width:auto}
}