:root{--bg: #f7f1e8;--surface: #ffffff;--ink: #2b1d12;--muted: #8a7562;--brown: #8b5a2b;--brown-deep: #5c3a1a;--tile: #8b5a2b;--tile-ink: #fff8ef;--tile-empty: #e9ded0;--tile-border: #cbb9a4;--accent: #e8b04b;--error: #c0392b;--success: #2e7d32;--key: #e9ded0;--key-ink: #2b1d12;--shadow: 0 6px 20px rgba(60, 35, 10, .12);--radius: 14px;color-scheme:light dark;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}@media(prefers-color-scheme:dark){:root{--bg: #1c140e;--surface: #2a1f16;--ink: #f4ebe0;--muted: #b39a82;--brown: #a86f3a;--brown-deep: #7a4d22;--tile: #a86f3a;--tile-ink: #fff8ef;--tile-empty: #33271d;--tile-border: #5a4632;--key: #3a2c20;--key-ink: #f4ebe0;--shadow: 0 6px 20px rgba(0, 0, 0, .4)}}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);overscroll-behavior:none}body{min-height:100dvh;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none;touch-action:manipulation}#root{min-height:100dvh}.app{min-height:100dvh;display:flex;flex-direction:column;max-width:520px;margin:0 auto;padding:calc(env(safe-area-inset-top) + 12px) 16px calc(env(safe-area-inset-bottom) + 8px)}.header{text-align:center;margin-bottom:8px}.title{margin:0;font-size:1.9rem;font-weight:800;letter-spacing:-.02em}.title-emoji{display:inline-block;transform:translateY(2px)}.subtitle{margin:4px 0 0;color:var(--muted);font-size:.95rem}.subtitle strong{color:var(--ink)}.main{flex:1;display:flex;flex-direction:column;align-items:center;gap:14px;padding-top:8px}.stats{display:flex;gap:28px}.stat{display:flex;flex-direction:column;align-items:center;min-width:64px}.stat-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}.stat-value{font-size:1.5rem;font-weight:800;line-height:1.1}.board{display:flex;flex-direction:column;align-items:center;gap:6px;width:100%}.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;width:min(100%,320px)}.tile{aspect-ratio:1;display:grid;place-items:center;font-size:clamp(1.8rem,9vw,2.6rem);font-weight:800;border-radius:var(--radius);transition:transform .12s ease,background-color .15s ease,border-color .15s ease}.tile-solid{background:var(--tile);color:var(--tile-ink);box-shadow:var(--shadow)}.tile-draft{background:var(--tile-empty);color:var(--ink);border:2px solid var(--tile-border)}.tile-filled{border-color:var(--brown);animation:pop .12s ease}.tile-changed{background:var(--accent);border-color:var(--accent);color:var(--brown-deep)}.tile-cursor{border-style:dashed}.arrow{color:var(--muted);font-size:1.3rem;line-height:1}.message{margin:4px 0 0;min-height:1.4em;font-size:.95rem;color:var(--muted);text-align:center}.message-error{color:var(--error);font-weight:600}.history{width:100%}.history-list{list-style:none;margin:0;padding:2px 4px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px;row-gap:8px}.history-item{display:flex;align-items:center;gap:6px}.history-arrow{color:var(--muted);font-size:.9rem}.chip{padding:4px 10px;border-radius:999px;background:var(--surface);border:1px solid var(--tile-border);font-weight:700;font-size:.85rem;letter-spacing:.06em}.chip-current{background:var(--brown);border-color:var(--brown);color:var(--tile-ink)}.actions{display:flex;gap:10px;align-items:center}.btn{font:inherit;font-weight:700;border:none;border-radius:999px;padding:10px 20px;cursor:pointer;transition:transform 80ms ease,opacity .12s ease}.btn:active{transform:scale(.96)}.btn-primary{background:var(--brown);color:var(--tile-ink);box-shadow:var(--shadow)}.btn-ghost{background:transparent;color:var(--muted);text-decoration:underline;padding:10px 12px}.btn-big{font-size:1.1rem;padding:14px 28px}.keyboard{display:flex;flex-direction:column;gap:6px;padding-top:10px}.keyboard-row{display:flex;justify-content:center;gap:5px}.key{flex:1 1 0;max-width:44px;height:52px;border:none;border-radius:8px;background:var(--key);color:var(--key-ink);font:inherit;font-weight:700;font-size:1.05rem;cursor:pointer;transition:transform 60ms ease,opacity .12s ease}.key:active{transform:scale(.94);opacity:.8}.key:disabled{opacity:.4;cursor:default}.key-wide{flex:1.6 1 0;max-width:72px;font-size:.75rem;letter-spacing:.04em}.overlay{position:fixed;inset:0;display:grid;place-items:center;padding:24px;background:#1e12088c;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);animation:fade .2s ease;z-index:10}.win-card{width:min(100%,380px);background:var(--surface);border-radius:22px;padding:28px 22px 24px;text-align:center;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:10px;animation:rise .26s cubic-bezier(.2,.9,.3,1.2)}.win-emoji{font-size:4rem;line-height:1;animation:wobble .9s ease-in-out infinite alternate}.win-title{margin:0;font-size:1.5rem;font-weight:800}.win-text{margin:0;color:var(--muted)}.win-stats{display:flex;gap:32px;margin:6px 0}.win-verdict{margin:0;font-weight:600}.win-verdict-perfect{color:var(--success)}.win-route{margin:0;font-size:.85rem;font-weight:700;letter-spacing:.04em;color:var(--muted);line-height:1.6}@keyframes pop{0%{transform:scale(.9)}to{transform:scale(1)}}@keyframes shake{10%,90%{transform:translate(-2px)}20%,80%{transform:translate(4px)}30%,50%,70%{transform:translate(-6px)}40%,60%{transform:translate(6px)}}.shake{animation:shake .4s cubic-bezier(.36,.07,.19,.97)}@keyframes fade{0%{opacity:0}to{opacity:1}}@keyframes rise{0%{opacity:0;transform:translateY(24px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes wobble{0%{transform:rotate(-8deg)}to{transform:rotate(8deg)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}.header-row{display:grid;grid-template-columns:40px 1fr 40px;align-items:center}.header-row .title{grid-column:2}.icon-btn{grid-column:3;width:40px;height:40px;border:none;border-radius:12px;background:transparent;font-size:1.3rem;cursor:pointer}.icon-btn:active{transform:scale(.92)}.segmented{display:inline-flex;margin:8px auto 0;padding:3px;border-radius:999px;background:var(--tile-empty);border:1px solid var(--tile-border)}.segment{border:none;background:transparent;color:var(--muted);font:inherit;font-weight:700;font-size:.85rem;padding:6px 16px;border-radius:999px;cursor:pointer;transition:background-color .15s ease,color .15s ease}.segment-active{background:var(--brown);color:var(--tile-ink)}.btn-pill{background:var(--tile-empty);color:var(--ink);border:1px solid var(--tile-border);padding:8px 14px;font-size:.9rem}.btn:disabled{opacity:.4;cursor:default;transform:none}.close-btn{position:absolute;top:10px;right:12px;width:34px;height:34px;border:none;border-radius:50%;background:var(--tile-empty);color:var(--muted);font-size:1.4rem;line-height:1;cursor:pointer}.win-card{position:relative}.share-status{margin:-4px 0 0;font-size:.85rem;color:var(--success);font-weight:600}.win-next{margin:0;font-size:.8rem;color:var(--muted)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px 8px;width:100%;margin:8px 0}.stats-grid .stat-value{font-size:1.7rem}