:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;--bg: #ffffff;--fg: #1a1a1a;--muted: #888;--tile-bg: #f5f5f5;--tile-border: #ddd;--tile-selected: #2563eb;--row-valid: #e6f4ea;--col-valid: #e6f4ea;--both-valid: #6abd8b}@media(prefers-color-scheme:dark){:root{--bg: #1a1a1a;--fg: #f0f0f0;--muted: #999;--tile-bg: #2a2a2a;--tile-border: #404040;--row-valid: #1f3a26;--col-valid: #1f3a26;--both-valid: #5cb47f}}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:var(--bg);color:var(--fg)}#root{display:flex;flex-direction:column;align-items:center;padding:env(safe-area-inset-top) 1rem env(safe-area-inset-bottom)}.app{width:100%;max-width:28rem;display:flex;flex-direction:column;gap:1.25rem;padding-top:1rem}.header{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid var(--tile-border);padding-bottom:.5rem}.header h1{font-size:1.4rem;margin:0;letter-spacing:.04em;white-space:nowrap}.header .meta{display:flex;gap:1rem;font-variant-numeric:tabular-nums;color:var(--muted);font-size:.95rem;flex-shrink:0}.header .meta .time{display:inline-block;min-width:4.5em;text-align:right}.grid-wrapper{position:relative;perspective:800px}.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;aspect-ratio:1}.tile{position:relative;cursor:pointer;-webkit-user-select:none;user-select:none;transform-style:preserve-3d;transition:transform .6s;aspect-ratio:1}.tile.face-down{transform:rotateX(180deg);cursor:default;pointer-events:none}.tile-face{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;border:2px solid var(--tile-border);border-radius:8px;font-size:clamp(1.4rem,7vw,2.2rem);font-weight:700;text-transform:uppercase;-webkit-backface-visibility:hidden;backface-visibility:hidden;transition:background-color .12s,border-color .12s}.tile-front{background:var(--tile-bg)}.tile-back{background:var(--tile-border);transform:rotateX(180deg)}.tile:not(.face-down):active{transform:scale(.96)}.tile.row-valid .tile-front{background:var(--row-valid)}.tile.col-valid .tile-front{background:var(--col-valid)}.tile.row-valid.col-valid .tile-front{background:var(--both-valid)}.tile.selected .tile-front{border-color:var(--tile-selected);border-width:3px}.go-button{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);padding:1rem 3rem;border-radius:12px;border:none;background:var(--tile-selected);color:#fff;font:inherit;font-size:1.6rem;font-weight:800;letter-spacing:.04em;cursor:pointer;box-shadow:0 6px 20px #00000040;z-index:2}.go-button:active{transform:translate(-50%,-50%) scale(.96)}.button{padding:.6rem 1rem;border-radius:8px;border:1px solid var(--tile-border);background:var(--tile-bg);color:var(--fg);font:inherit;font-weight:600;cursor:pointer}.button.primary{background:var(--tile-selected);color:#fff;border-color:transparent}.intro{font-size:.9rem;color:var(--muted);text-align:center;line-height:1.4}.modal-backdrop{position:fixed;inset:0;background:#0000008c;display:flex;align-items:center;justify-content:center;padding:1rem;z-index:10}.modal{background:var(--bg);color:var(--fg);border-radius:12px;padding:1.5rem;width:100%;max-width:24rem;display:flex;flex-direction:column;gap:1rem;box-shadow:0 10px 40px #0000004d}.modal h2{margin:0;font-size:1.3rem}.modal .subhead{margin:-.5rem 0 0;font-size:1rem;color:var(--muted);font-variant-numeric:tabular-nums}.stats-panel{display:flex;flex-direction:column;gap:.6rem}.stats-section{font-size:.75rem;font-weight:700;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-top:.25rem}.stats-divider{border:0;border-top:1px solid var(--tile-border);margin:.5rem 0 0;width:100%}.you-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem;text-align:center;font-variant-numeric:tabular-nums}.you-stats-value{font-size:1.5rem;font-weight:700;line-height:1.1}.you-stats-label{font-size:.75rem;color:var(--muted)}.distribution{display:flex;flex-direction:column;gap:4px}.distribution-row{display:grid;grid-template-columns:3.5rem 1fr auto;align-items:center;gap:.5rem;font-size:.85rem;font-variant-numeric:tabular-nums}.distribution-label{color:var(--muted)}.distribution-bar-container{height:1.1rem;background:transparent;border-radius:3px;overflow:hidden}.distribution-bar{display:block;height:100%;background:var(--row-valid);min-width:4px;border-radius:3px;transition:width .2s}.distribution-row.you .distribution-bar{background:var(--both-valid)}.distribution-row.you{font-weight:700}.percentile{font-size:.85rem;color:var(--muted);font-style:italic;text-align:center;margin-top:.25rem}.info-button{display:inline-flex;align-items:center;justify-content:center;width:1.6rem;height:1.6rem;padding:0;border:none;background:transparent;color:var(--muted);font-size:1.2rem;cursor:pointer;line-height:1}.info-button:hover{color:var(--fg)}.how-to-play{list-style:disc;padding-left:1.25rem;margin:0;display:flex;flex-direction:column;gap:.4rem;font-size:.95rem;line-height:1.4}.feedback-input{width:100%;resize:vertical;padding:.5rem .75rem;border-radius:8px;border:1px solid var(--tile-border);background:var(--tile-bg);color:var(--fg);font:inherit;font-size:.9rem;font-family:inherit;box-sizing:border-box}.feedback-input:focus{outline:2px solid var(--tile-selected);outline-offset:-1px}.toast{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);background:#000000d9;color:#fff;padding:.6rem 1rem;border-radius:8px;font-size:.9rem;z-index:20}.celebration{position:fixed;top:35%;left:50%;background:var(--fg);color:var(--bg);padding:1rem 2rem;border-radius:12px;font-size:2rem;font-weight:800;letter-spacing:.02em;z-index:15;pointer-events:none;box-shadow:0 8px 30px #00000059;animation:celebration-pop 1.5s ease-out forwards}@keyframes celebration-pop{0%{opacity:0;transform:translate(-50%,-40%) scale(.7)}15%{opacity:1;transform:translate(-50%,-50%) scale(1.08)}25%{transform:translate(-50%,-50%) scale(1)}75%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-55%) scale(.95)}}.leaderboard{display:flex;flex-direction:column;gap:.25rem;max-height:12rem;overflow-y:auto}.leaderboard .row{display:grid;grid-template-columns:2rem 1fr auto;gap:.5rem;font-size:.9rem;font-variant-numeric:tabular-nums;padding:.2rem 0}.leaderboard .row.me{font-weight:700}.leaderboard .row .rank{color:var(--muted)}