:root{color-scheme:dark;--bg:#10131c;--panel:#191e2a;--border:#2a3242;--text:#edf1f7;--muted:#8d99ad;--accent:#8cf0ce;font-family:Inter,Segoe UI,system-ui,sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 50% 35%,#1b2635 0,transparent 62%),var(--bg);color:var(--text);min-height:100dvh}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit;border:0}button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button:disabled{opacity:.4;cursor:default}button:hover:not(:disabled){filter:brightness(1.14)}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}.app{max-width:1000px;margin:auto;padding:20px 18px 24px}.header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding-bottom:18px}.brand{font-size:17px;letter-spacing:1px;font-weight:800;display:flex;align-items:center;text-decoration:none;color:var(--text)}.brand>span:last-child{color:var(--accent)}.brand-icon{color:var(--accent);font-size:29px;margin-right:10px;line-height:1}.mode{font-size:10px;letter-spacing:1.5px;border:1px solid var(--border);border-radius:20px;padding:7px 10px;display:flex;align-items:center;gap:7px}.mode i{width:6px;height:6px;border-radius:50%;background:var(--accent)}.intro{margin:24px 0 20px}.eyebrow{font-size:9px;letter-spacing:1.6px;color:var(--accent);font-weight:700;margin:0 0 8px}h1{font-size:25px;letter-spacing:-.9px;margin:0;font-weight:650}.intro-note{display:none}.game-layout{display:grid;grid-template-columns:65px minmax(0,1fr) 65px;gap:9px;align-items:start;max-width:550px;margin:auto}.panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}h2{font-size:9px;letter-spacing:1.2px;font-weight:600;color:var(--muted);margin:0}.panel h2{display:flex;justify-content:space-between;gap:4px}.panel kbd{display:none}.hold-panel,.next-panel{padding:11px 5px;text-align:center}.hold-panel h2,.next-panel h2{justify-content:center;letter-spacing:.6px;font-size:8px}.next-panel h2 span{display:none}canvas{display:block;max-width:100%}#hold,#next{width:100%;height:auto;margin:6px auto}.small{font-size:8px;color:var(--muted)}.stats{margin-top:10px;padding:0 7px}.stat{padding:13px 0;border-bottom:1px solid var(--border)}.stat:last-child{border:0}.stat h2{font-size:7px;letter-spacing:.5px}.stat strong{display:block;font-size:21px;font-variant-numeric:tabular-nums;font-weight:600;margin-top:5px}.score-stat strong{color:var(--accent);font-size:18px;overflow-wrap:anywhere}.session-info{display:none}.board-shell{position:relative;border:1px solid #43536b;border-radius:8px;overflow:hidden;box-shadow:0 16px 50px #0005;background:#0c1019}#board{width:100%;height:auto;aspect-ratio:1/2}.board-footer{display:flex;justify-content:space-between;font-size:8px;color:var(--muted);padding:10px 1px;gap:4px}#status{color:var(--accent)}.overlay{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:#101620ec;padding:12px;backdrop-filter:blur(4px)}.overlay-mark{font-size:40px;color:var(--accent);margin-bottom:16px}.overlay .eyebrow{font-size:7px;letter-spacing:1px}.overlay h2{font-size:23px;letter-spacing:-.7px;color:var(--text);font-weight:650}.overlay p:not(.eyebrow){font-size:10px;line-height:1.8;color:#a8b4c7;margin:12px 0 20px}.primary{background:var(--accent);color:#12271f;border-radius:6px;padding:12px 10px;font-weight:700;font-size:10px;width:100%;max-width:230px;display:flex;justify-content:space-between;gap:8px}.actions{display:grid;gap:8px;margin-top:10px}.secondary{background:var(--panel);border:1px solid var(--border);padding:11px 2px;border-radius:6px;font-size:8px;display:flex;justify-content:center;gap:4px}.secondary kbd,.secondary span{display:none}.touch-controls{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;max-width:420px;margin:12px auto 0;user-select:none}.touch-controls button{background:#232c3c;border:1px solid #3a475d;border-radius:9px;min-height:48px;font-size:22px;touch-action:none;user-select:none}.touch-controls button:first-child{font-size:10px;font-weight:700;letter-spacing:.5px}.touch-controls span{font-size:10px;vertical-align:middle;font-weight:700}.touch-controls .drop-button{background:#20453f;color:var(--accent);border-color:#35655a}.touch-controls button.is-down{background:#405574}.help{display:none}.footnote{text-align:center;font-size:7px;letter-spacing:1px;color:#67748a;margin-top:22px}.footnote span{margin:0 8px}kbd{font-family:inherit;background:#232b3a;border:1px solid #364155;border-radius:4px;font-size:10px;padding:2px 5px;color:#bec9d9}
@media(min-width:600px){.app{padding:28px 30px}.intro{display:flex;justify-content:space-between;align-items:end;margin:30px auto 24px;max-width:740px}.intro-note{display:block;color:var(--muted);font-size:12px;margin:0 0 4px}h1{font-size:30px}.eyebrow{font-size:9px}.game-layout{grid-template-columns:140px minmax(0,300px) 140px;gap:22px;max-width:624px}.hold-panel,.next-panel{padding:16px 14px}.hold-panel h2,.next-panel h2{justify-content:space-between;font-size:10px;letter-spacing:1px}.panel kbd,.next-panel h2 span{display:inline}.small{font-size:10px}.stats{padding:0 17px;margin-top:16px}.stat{padding:18px 0}.stat h2{font-size:9px;letter-spacing:1px}.stat strong,.score-stat strong{font-size:29px}.session-info{display:grid;gap:6px;margin:20px 4px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.board-footer{font-size:10px}.overlay{padding:25px}.overlay h2{font-size:32px}.overlay .eyebrow{font-size:9px}.overlay p:not(.eyebrow){font-size:12px}.primary{padding:14px 16px;font-size:12px}.secondary{font-size:11px;padding:13px 10px;justify-content:space-between}.secondary kbd,.secondary span{display:inline}.actions{margin-top:16px}.help{display:flex;justify-content:center;flex-wrap:wrap;gap:18px;margin-top:26px;color:var(--muted);font-size:10px}.help span{display:flex;align-items:center;gap:5px}.footnote{font-size:8px;margin-top:25px}}
@media(min-width:760px) and (pointer:fine){.touch-controls{display:none}}
@media(min-width:600px) and (max-height:850px) and (pointer:fine){.game-layout{grid-template-columns:130px minmax(0,240px) 130px;max-width:544px}.intro{margin-top:20px;margin-bottom:18px}.app{padding-top:18px}.stat{padding:12px 0}#next{max-height:245px;width:auto}.help{margin-top:14px}.footnote{margin-top:18px}}
@media(max-width:359px){.app{padding:12px 8px}.game-layout{grid-template-columns:57px minmax(0,1fr) 57px;gap:6px}.intro{margin:18px 0 16px}h1{font-size:22px}.overlay h2{font-size:20px}.primary{font-size:9px}.stat h2{font-size:6px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

.guide-links{display:flex;flex-wrap:wrap;gap:16px;max-width:624px;margin:16px auto;font-size:12px}
.guide-links a,.game-guide a{color:var(--accent);text-underline-offset:3px}
.game-guide{max-width:624px;margin:36px auto 0;border-top:1px solid var(--border);padding-top:24px;line-height:1.7}
.game-guide h2{font-size:20px;color:var(--text);letter-spacing:0;margin:24px 0 10px}
.game-guide h3{font-size:15px;margin:20px 0 8px}.game-guide p{font-size:14px;color:#b6c1d2;margin:10px 0}