:root{
  --bg:#12100d; --panel:#1b1814; --line:#332d25; --ink:#e9e1d1; --dim:#9b9080;
  --acc:#f0a646; --acc2:#5fc4b8; --cell:#f6d38a;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --serif:Georgia,"Iowan Old Style","Palatino Linotype",serif;
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;color:var(--ink);background:var(--bg);font:15px/1.5 var(--serif);min-height:100vh;display:flex;flex-direction:column}
.mono{font-family:var(--mono)}
a{color:var(--acc)}
a:hover{color:var(--cell)}
:focus-visible{outline:2px solid var(--acc2);outline-offset:2px}
.top{padding:22px 16px 0;max-width:1100px;margin:0 auto;width:100%}
h1{font-size:28px;margin:0;letter-spacing:.02em;font-weight:normal}
.sub{margin:2px 0 14px;color:var(--dim)}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line)}
.tabs button{background:none;border:1px solid transparent;border-bottom:none;color:var(--dim);font:inherit;padding:8px 16px;cursor:pointer;border-radius:6px 6px 0 0}
.tabs button:hover{color:var(--ink)}
.tabs button[aria-selected=true]{color:var(--ink);background:var(--panel);border-color:var(--line);margin-bottom:-1px}
.tabs .mono{color:var(--acc);font-size:13px;margin-left:4px}
main{flex:1;max-width:1100px;margin:0 auto;width:100%;padding:16px}
.mode{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}
.mode[hidden]{display:none}
.stage{background:#0a0908;border:1px solid var(--line);border-radius:8px;padding:10px}
canvas{display:block;width:100%;image-rendering:pixelated;background:#0a0908;border-radius:3px}
#c2{cursor:crosshair;touch-action:none}
.statusline{display:flex;gap:16px;align-items:center;margin-top:8px;color:var(--dim);font-size:13px;flex-wrap:wrap}
#s1name{color:var(--acc2);font-style:italic}
#spark{width:120px;height:22px;margin-left:auto;image-rendering:auto;background:none}
.side{display:flex;flex-direction:column;gap:12px}
.block{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:12px}
.lab{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin:0 0 6px}
.lab small{text-transform:none;letter-spacing:0;font-size:12px;opacity:.85;margin-left:4px}
.block .lab:not(:first-child){margin-top:12px}
.note{margin:8px 0 0;font-size:13px;color:var(--dim)}
.rulerow{display:flex;gap:6px;align-items:center}
.num{background:#0a0908;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:7px 8px;font-size:20px;width:84px;text-align:center}
.num.wide{width:100%;text-align:left;letter-spacing:.06em}
.num:hover{border-color:var(--dim)}
.num.bad{border-color:#d4574a}
.btn,.sq,select{background:#26211b;color:var(--ink);border:1px solid var(--line);border-radius:6px;font:inherit;font-size:14px;padding:7px 12px;cursor:pointer}
.btn:hover,.sq:hover,select:hover,.seg button:hover{border-color:var(--acc);background:#2e281f}
.btn:active,.sq:active{transform:translateY(1px)}
.btn.primary{background:var(--acc);color:#1b1208;border-color:var(--acc);font-weight:bold}
.btn.primary:hover{background:var(--cell)}
.sq{padding:7px 11px;font-size:18px;line-height:1}
select{width:100%}
kbd{font-family:var(--mono);font-size:11px;opacity:.65;margin-left:4px;border:1px solid currentColor;border-radius:3px;padding:0 4px}
.row2{display:flex;gap:8px}.row2 .btn{flex:1}
.seg{display:flex;gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg.wrap{flex-wrap:wrap;border:none;gap:6px;overflow:visible}
.seg button{flex:1;background:#26211b;color:var(--dim);border:none;border-right:1px solid var(--line);font:inherit;font-size:13px;padding:7px 6px;cursor:pointer}
.seg.wrap button{border:1px solid var(--line);border-radius:6px;flex:none;padding:6px 10px;color:var(--ink)}
.seg button:last-child{border-right:none}
.seg button[aria-pressed=true]{background:var(--acc);color:#1b1208;font-weight:bold}
input[type=range]{width:100%;accent-color:var(--acc)}
.chk{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--dim);margin-top:10px;cursor:pointer}
.chk input{accent-color:var(--acc)}
/* lookup table */
.table{display:grid;grid-template-columns:repeat(8,1fr);gap:4px}
.tcell{display:flex;flex-direction:column;align-items:center;gap:3px;background:none;border:none;padding:0;cursor:pointer;color:inherit}
.tcell .tri,.tcell .res{display:grid;grid-template-columns:repeat(3,1fr);width:100%;gap:1px}
.tcell .res{grid-template-columns:1fr;padding:0 0}
.tcell i{display:block;aspect-ratio:1;background:#2a251d;border-radius:1px}
.tcell i.on{background:var(--cell)}
.tcell .res i{aspect-ratio:1.2;border-radius:2px;border:1px solid var(--line);transition:background .12s}
.tcell .res i.on{border-color:var(--acc)}
.tcell:hover .res i{border-color:var(--acc2)}
.tcell:focus-visible{outline-offset:1px}
/* digit toggles */
.dig{display:grid;grid-template-columns:repeat(9,1fr);gap:4px}
.dig button{font:var(--mono);font-family:var(--mono);font-size:14px;aspect-ratio:1;background:#26211b;color:var(--dim);border:1px solid var(--line);border-radius:5px;cursor:pointer;padding:0}
.dig button:hover{border-color:var(--acc)}
.dig button[aria-pressed=true]{background:var(--acc);color:#1b1208;border-color:var(--acc);font-weight:bold}
/* gallery */
.gallery{grid-column:1/-1}
.gallery h2{font-size:16px;font-weight:normal;margin:6px 0 10px}
.gallery h2 small{color:var(--dim);font-size:13px;margin-left:8px}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:6px}
.th{position:relative;background:#0a0908;border:1px solid var(--line);border-radius:4px;padding:0;cursor:pointer;overflow:hidden;aspect-ratio:1}
.th canvas{width:100%;height:100%;border-radius:0}
.th span{position:absolute;left:3px;bottom:2px;font:11px var(--mono);color:var(--ink);text-shadow:0 0 3px #000,0 0 3px #000}
.th:hover{border-color:var(--acc)}
.th[aria-current=true]{border-color:var(--acc2);box-shadow:0 0 0 1px var(--acc2)}
.foot{max-width:1100px;margin:0 auto;width:100%;padding:12px 16px 24px;color:var(--dim);font-size:13px;display:flex;gap:12px;flex-wrap:wrap}
.foot .hint{margin-left:auto}
@media (max-width:820px){
  .mode{grid-template-columns:1fr}
  .foot .hint{margin-left:0;flex-basis:100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

.rle{width:100%;box-sizing:border-box;background:#0a0908;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:7px 8px;font-size:12px;resize:vertical}
.rle:hover{border-color:var(--dim)}
#c2.stamping{cursor:crosshair}