:root{
  --bg:#13090d;
  --panel:rgba(255,255,255,.045);
  --panel-2:rgba(255,255,255,.08);
  --line:rgba(236,200,210,.14);
  --line-2:rgba(236,200,210,.30);
  --text:#f6ecee;
  --text-2:#cdb3bb;
  --text-3:#9a7e85;
  --accent:#e85d8c;
  --accent-deep:#7a1443;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
  --mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
body{
  background:var(--bg); color:var(--text); font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(130% 95% at 50% -8%, #1e0d14 0%, #160a0f 52%, #0a0507 100%);
  background-attachment:fixed;
  padding:0 20px max(28px, env(safe-area-inset-bottom));
}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:6px}
button{font-family:inherit; color:inherit; background:none; border:none; cursor:pointer}
a{color:inherit}

.back{
  display:inline-flex; align-items:center; gap:6px; margin:max(16px, env(safe-area-inset-top)) 0 0;
  font:500 14px/1 var(--sans); color:var(--text-2); text-decoration:none;
}
.back:hover{color:var(--text)}

.head{max-width:680px; margin:18px auto 0; padding:0 2px}
.kicker{font-size:11.5px; font-weight:600; letter-spacing:.15em; text-transform:uppercase; color:var(--text-3)}
h1{
  font-family:var(--serif); font-weight:400; font-size:clamp(30px, 4.6vw, 48px);
  line-height:1.03; letter-spacing:-.01em; margin:6px 0 10px;
}
.sub{font-size:14.5px; line-height:1.6; color:var(--text-2); max-width:62ch}
.sub strong{color:var(--text); font-weight:600}

main{max-width:680px; margin:0 auto; display:flex; flex-direction:column; gap:26px; padding-top:22px}

.stage{display:flex; flex-direction:column; gap:10px}
.canvas-wrap{
  position:relative; width:100%; aspect-ratio:1; border-radius:16px; overflow:hidden;
  background:#0c0608; border:1px solid var(--line);
  box-shadow:0 22px 46px -30px #000, 0 1px 0 rgba(246,236,238,.06) inset;
  touch-action:none; cursor:crosshair;
}
.canvas-wrap.dragging-seed{cursor:grabbing}
#mosaic{display:block; width:100%; height:100%}

.busy{
  position:absolute; top:10px; right:12px; font:600 11px/1 var(--mono);
  letter-spacing:.06em; text-transform:uppercase; color:var(--text-2);
  background:rgba(10,6,8,.72); border:1px solid var(--line); border-radius:7px; padding:5px 9px;
}

.hint{font-size:12px; color:var(--text-3)}

.controls{display:flex; flex-direction:column; gap:12px}
.control-row{display:flex; flex-direction:column; gap:6px}
.control-row label{font-size:12.5px; font-weight:600; color:var(--text-2)}
.control-row label span{font:600 12px var(--mono); color:var(--accent)}

input[type=range]{
  -webkit-appearance:none; appearance:none; width:100%; height:26px;
  background:transparent; cursor:pointer; display:block;
}
input[type=range]::-webkit-slider-runnable-track{height:5px; border-radius:99px; background:rgba(255,255,255,.13)}
input[type=range]::-moz-range-track{height:5px; border-radius:99px; background:rgba(255,255,255,.13)}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none; width:19px; height:19px; margin-top:-7px;
  border-radius:50%; background:var(--accent); border:none;
  box-shadow:0 1px 5px rgba(0,0,0,.5), 0 0 0 1px rgba(0,0,0,.25);
}
input[type=range]::-moz-range-thumb{
  width:19px; height:19px; border-radius:50%; background:var(--accent); border:none;
  box-shadow:0 1px 5px rgba(0,0,0,.5);
}

.button-row{display:flex; gap:10px; flex-wrap:wrap}
.button-row button{
  flex:1 1 auto; min-width:0; height:38px; padding:0 14px; border-radius:10px;
  background:var(--panel-2); border:1px solid var(--line);
  font:600 13px/1 var(--sans); color:var(--text);
  transition:background .14s, border-color .14s, transform .08s;
}
.button-row button:hover{background:rgba(255,255,255,.13); border-color:var(--line-2)}
.button-row button:active{transform:translateY(1px)}
#btnRelax{background:rgba(232,93,140,.18); border-color:rgba(232,93,140,.5); color:#ffd3e3}
#btnRelax:hover{background:rgba(232,93,140,.26)}
#btnRelax:disabled{opacity:.55; cursor:default}

.button-row-2{align-items:center}
.toggle{
  display:flex; align-items:center; gap:7px; flex:0 0 auto; height:38px; padding:0 12px;
  border-radius:10px; background:var(--panel); border:1px solid var(--line);
  font:600 13px/1 var(--sans); color:var(--text-2); cursor:pointer;
}
.toggle input{accent-color:var(--accent); width:15px; height:15px; cursor:pointer}
.toggle:has(input:checked){color:var(--text); border-color:var(--line-2)}

.file-btn{
  position:relative; display:flex; align-items:center; justify-content:center; flex:1 1 auto;
  height:38px; padding:0 14px; border-radius:10px; background:var(--panel-2);
  border:1px solid var(--line); font:600 13px/1 var(--sans); color:var(--text); cursor:pointer;
  text-align:center; overflow:hidden; transition:background .14s, border-color .14s;
}
.file-btn:hover{background:rgba(255,255,255,.13); border-color:var(--line-2)}
.file-btn input{position:absolute; inset:0; opacity:0; cursor:pointer}

.stats{display:grid; grid-template-columns:1fr 1fr; gap:8px}
.stat{
  background:var(--panel); border:1px solid var(--line); border-radius:11px;
  padding:9px 12px; display:flex; flex-direction:column; gap:3px;
}
.stat-wide{grid-column:span 2}
.stat-label{font-size:10.5px; font-weight:600; letter-spacing:.1em; text-transform:uppercase; color:var(--text-3)}
.stat-value{font:600 19px/1.1 var(--mono); color:var(--text)}
#statMove{color:var(--accent)}

.about{max-width:62ch; padding-bottom:4px}
.about h2{font-family:var(--serif); font-weight:400; font-size:26px; margin-bottom:10px; color:var(--text)}
.about p{font-size:14.5px; line-height:1.68; color:var(--text-2); margin-bottom:12px}
.about p strong{color:var(--text); font-weight:600}

.foot{
  max-width:680px; margin:8px auto 0; padding-top:16px; border-top:1px solid var(--line);
}
.foot a{font-size:13px; color:var(--text-2); text-decoration:none}
.foot a:hover{color:var(--text)}

@media (max-width:420px){
  .head{margin-top:14px}
  h1{font-size:clamp(26px, 8.6vw, 34px)}
  .stat-value{font-size:17px}
  .button-row-2{flex-direction:column; align-items:stretch}
  .button-row-2 .toggle, .button-row-2 .file-btn{flex:1 1 auto}
}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important}
}