:root{
  --bg:#fff8f4;--surface:#ffffff;--ink:#2b2230;--muted:#7a6d7f;--line:#f0dfe3;
  --petal:#e8527a;--petal-soft:#fde3ea;--leaf:#3f9a6b;--leaf-soft:#dcf3e6;--sun:#f4b73f;
  --tile:#fff;--tile-ink:#2b2230;--tile-line:#eac9d2;--shadow:0 2px 0 #eac9d2;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#1b1620;--surface:#251e2b;--ink:#f4ecf5;--muted:#b3a5b8;--line:#3a2f41;
    --petal:#ff7098;--petal-soft:#4a2433;--leaf:#5cc48e;--leaf-soft:#1f3a2c;--sun:#f7c55c;
    --tile:#2f2636;--tile-ink:#f4ecf5;--tile-line:#4d3f56;--shadow:0 2px 0 #120e15;color-scheme:dark}
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-tap-highlight-color:transparent;min-height:100vh;display:flex;flex-direction:column;align-items:center}
button{font:inherit;color:inherit;cursor:pointer}
.bar{width:100%;max-width:560px;display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line)}
.logo{margin:0;font-size:24px;letter-spacing:.5px;font-weight:800}
.logo-mark{color:var(--petal)}
.icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);font-weight:700;font-size:18px}
.bar-right{display:flex;gap:8px}
main{width:100%;max-width:560px;padding:12px 16px 8px}
.mode-row{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--muted)}
.link-btn{background:none;border:0;color:var(--petal);font-weight:600;padding:6px 0;text-decoration:underline;text-underline-offset:3px}
.rounds{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:10px 0 6px}
.round{border:2px solid var(--line);background:var(--surface);border-radius:12px;padding:6px 2px;font-weight:700;font-size:17px;position:relative;min-height:54px}
.round small{display:block;font-size:12px;font-weight:600;color:var(--muted);letter-spacing:1px;min-height:16px}
.round.active{border-color:var(--petal);box-shadow:0 0 0 3px var(--petal-soft)}
.round.done{background:var(--leaf-soft)}
.target-wrap{text-align:center;margin:10px 0 4px}
.target-caption{font-size:13px;text-transform:uppercase;letter-spacing:2px;color:var(--muted)}
.target{font-size:64px;line-height:1;font-weight:800;color:var(--petal);font-variant-numeric:tabular-nums}
.closest{font-size:14px;color:var(--muted);min-height:20px;margin-top:4px}
.board{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px auto 12px;max-width:320px}
.tile{aspect-ratio:1/1;border-radius:50%;border:2px solid var(--tile-line);background:var(--tile);color:var(--tile-ink);
  font-size:clamp(22px,7vw,32px);font-weight:800;font-variant-numeric:tabular-nums;box-shadow:var(--shadow);
  transition:transform .12s ease,background .15s,border-color .15s;display:flex;align-items:center;justify-content:center}
.tile:active{transform:scale(.95)}
.tile.sel{background:var(--petal);color:#fff;border-color:var(--petal)}
.tile.gone{visibility:hidden}
.tile.new{animation:bloom .35s ease}
.tile.hit{background:var(--leaf);border-color:var(--leaf);color:#fff}
@keyframes bloom{0%{transform:scale(.4)}70%{transform:scale(1.12)}100%{transform:scale(1)}}
.shake{animation:shake .3s}
@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.ops{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:360px;margin:0 auto}
.op{height:54px;border-radius:14px;border:2px solid var(--line);background:var(--surface);font-size:28px;font-weight:700}
.op.sel{background:var(--sun);border-color:var(--sun);color:#2b2230}
.actions{display:flex;gap:10px;max-width:360px;margin:14px auto 0}
.btn{flex:1;height:48px;border-radius:24px;border:0;background:var(--petal);color:#fff;font-weight:700;font-size:16px}
.btn.ghost{background:var(--surface);color:var(--ink);border:2px solid var(--line)}
.btn:disabled{opacity:.45;cursor:default}
.log{list-style:none;padding:0;margin:14px auto 0;max-width:360px;font-size:15px;color:var(--muted);text-align:center;min-height:24px}
.log li{display:inline-block;margin:2px 6px;font-variant-numeric:tabular-nums}
.seo{width:100%;max-width:560px;padding:8px 16px 0;color:var(--muted);font-size:14px}
.seo h2{font-size:16px;color:var(--ink);margin:18px 0 6px}
.more{width:100%;max-width:560px;margin-top:20px;padding:16px;border-top:1px solid var(--line);text-align:center;font-size:14px}
.more-title{font-weight:700;margin-bottom:8px}
.more-links{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.more-links a{color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 12px;text-decoration:none}
.more-links a:hover{border-color:var(--petal)}
.copy{margin-top:12px;color:var(--muted);font-size:12px}
.modal{position:fixed;inset:0;background:rgba(20,10,20,.55);display:flex;align-items:center;justify-content:center;padding:16px;z-index:10}
.modal[hidden]{display:none}
.modal-card{position:relative;background:var(--surface);border-radius:18px;max-width:420px;width:100%;max-height:90vh;overflow:auto;padding:22px 20px 20px;box-shadow:0 20px 50px rgba(0,0,0,.3)}
.modal-close{position:absolute;right:10px;top:10px}
.modal-card h2{margin:0 0 10px;font-size:22px}
.modal-card p{margin:8px 0}
.stats{display:grid;grid-template-columns:repeat(4,1fr);text-align:center;margin:12px 0}
.stats b{display:block;font-size:26px}
.stats span{font-size:12px;color:var(--muted)}
.dist{margin:8px 0}
.dist-row{display:flex;align-items:center;gap:8px;font-size:13px;margin:3px 0}
.dist-row .bar-fill{background:var(--petal);color:#fff;border-radius:4px;padding:1px 6px;min-width:22px;text-align:right}
.share-grid{font-size:30px;letter-spacing:4px;text-align:center;margin:8px 0}
.big-score{font-size:44px;font-weight:800;text-align:center;color:var(--petal)}
.countdown{text-align:center;color:var(--muted);font-size:14px}
.sol{font-variant-numeric:tabular-nums;background:var(--bg);border-radius:10px;padding:8px 12px;font-size:15px}
.toast{position:fixed;top:70px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-weight:600;opacity:0;pointer-events:none;transition:opacity .2s;z-index:20;max-width:90vw;text-align:center}
.toast.show{opacity:1}
.how-demo{display:flex;gap:6px;align-items:center;justify-content:center;font-weight:800;font-size:20px;margin:10px 0}
.how-demo span{display:inline-flex;width:40px;height:40px;border-radius:50%;align-items:center;justify-content:center;border:2px solid var(--tile-line)}
.how-demo .o{border:0;width:auto}
@media (max-width:380px){.target{font-size:54px}.op{height:48px}}