@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:4;
  --gap:8px;
  --size:min(100%,calc(100dvh - 210px),520px);
}
*{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;align-content:start;padding:14px 16px;gap:14px;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}
#score.up{animation:up .25s}
.best{color:var(--soft);font-size:15px}
@keyframes up{40%{translate:0 -3px}}

/* Empty squares are drawn by the board's background; tiles sit on top. */
.board{
  position:relative;width:var(--size);aspect-ratio:1;padding:var(--gap);border:1px solid var(--ink);
  outline:none;overflow:hidden;container-type:inline-size;
}
.board:focus-visible{box-shadow:0 0 0 2px var(--paper),0 0 0 4px var(--ink)}
.slot,.tile{
  position:absolute;
  width:calc((100% - var(--gap)*(var(--n) + 1))/var(--n));height:calc((100% - var(--gap)*(var(--n) + 1))/var(--n));
  left:calc(var(--gap) + var(--x)*((100% - var(--gap))/var(--n)));
  top:calc(var(--gap) + var(--y)*((100% - var(--gap))/var(--n)));
}
.slot{border:1px solid var(--hair)}
.tile{
  display:grid;place-items:center;
  transition:left .11s ease-in-out,top .11s ease-in-out;
  background:color-mix(in srgb,var(--ink) var(--k),var(--paper));
  color:var(--ink);
  font-size:11cqw;font-weight:500;font-variant-numeric:tabular-nums;line-height:1;
}
.tile.dark{color:var(--paper)}
.tile.d3{font-size:9cqw}
.tile.d4{font-size:7cqw}
.tile.d5{font-size:5.6cqw}
.tile.goal{box-shadow:inset 0 0 0 3px var(--paper),inset 0 0 0 4px var(--ink)}
.tile.born{animation:born .16s ease-out .08s backwards}
.tile.pop{animation:pop .16s ease-out .08s}
.tile.gone{z-index:0}
@keyframes born{from{scale:.3;opacity:0}}
@keyframes pop{50%{scale:1.12}}

.board.over .tile{opacity:.4}

.foot{display:flex;flex-direction:column;height:100%}
.status{min-height:2.9em;line-height:1.35;font-variant-numeric:tabular-nums}
.controls{margin-top:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:8px}
.controls>:first-child{justify-self:start}
#restart{justify-self:end}
#restart.ready{font-weight:500;color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.range{color:var(--soft);font-size:15px;font-variant-numeric:tabular-nums}
.quiet{color:var(--soft);font-size:15px;min-height:44px;padding:0 4px}
.quiet:hover{color:var(--ink)}

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){.tile{transition:none}.tile.born,.tile.pop,#score.up{animation:none}}
@media (max-height:560px) 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 - 40px)}
  .board{grid-column:1;grid-row:1/3}
  .bar,.foot{grid-column:2;width:auto}
}