:root{color-scheme:dark;--bg: #221a13;--surface: #2d2318;--surface-2: #3a2d1f;--text: #f4e9d8;--muted: #b39c7d;--accent: #ffb454;--accent-2: #7ddb91;--line: #4a3a27;--radius-card: 14px;--radius-button: 10px;--shadow-card: 0 10px 30px rgb(0 0 0 / .35);--font-display: "Fredoka", system-ui, sans-serif;--font-ui: "Nunito Sans", system-ui, sans-serif;--speed-ui: .16s}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:radial-gradient(1100px 600px at 70% -10%,rgb(255 180 84 / .07),transparent 60%),var(--bg);color:var(--text);font-family:var(--font-ui);line-height:1.5}#brand{display:flex;align-items:baseline;gap:16px;padding:20px 32px 12px;max-width:1240px;width:100%;margin:0 auto}#wordmark{margin:0;display:flex;align-items:center;gap:10px;color:var(--accent);font-family:var(--font-display);font-weight:700;font-size:2.1rem;letter-spacing:.01em}#wordmark .mark{display:block;transition:transform var(--speed-ui) ease-out}#wordmark:hover .mark{transform:translate(3px)}#tagline{margin:0;color:var(--muted);font-size:1rem;flex:1}#header-repo{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem;padding:6px 14px;border:1px solid var(--line);border-radius:var(--radius-button);transition:color var(--speed-ui) ease-out,border-color var(--speed-ui) ease-out}#header-repo:hover{color:var(--accent);border-color:var(--accent)}main{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;align-items:start;width:100%;max-width:1240px;margin:0 auto;padding:8px 32px 24px}#board-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:20px 24px 16px;display:flex;flex-direction:column;gap:16px}#hud{display:flex;align-items:center;gap:32px}.hud-stat{display:flex;flex-direction:column;gap:2px}.hud-label{color:var(--muted);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.hud-value{font-family:var(--font-display);font-weight:600;font-size:1.35rem;color:var(--text);font-variant-numeric:tabular-nums}.hud-difficulty{margin-left:auto}#board-frame{position:relative;display:flex;align-items:center;justify-content:center;min-height:42vh;padding:12px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:inset 0 0 80px #00000080,inset 0 0 200px #ffb4540d}canvas{display:block;border-radius:8px;touch-action:manipulation;max-width:100%}#win-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#221a139e;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);border-radius:var(--radius-card);animation:overlay-in .22s ease-out}#win-overlay[hidden]{display:none}@keyframes overlay-in{0%{opacity:0}to{opacity:1}}#win-card{background:var(--surface-2);border:1px solid #6b5539;border-radius:var(--radius-card);box-shadow:var(--shadow-card),0 0 40px #7ddb9126;padding:28px 40px;text-align:center;animation:card-pop .26s cubic-bezier(.34,1.4,.64,1)}@keyframes card-pop{0%{transform:scale(.85);opacity:0}to{transform:scale(1);opacity:1}}#win-title{margin:0 0 4px;font-family:var(--font-display);font-weight:700;font-size:2rem;color:var(--accent-2)}#win-moves{margin:0 0 16px;color:var(--muted)}#win-actions{display:flex;gap:12px;justify-content:center}#controls,#solver-controls{display:flex;flex-wrap:wrap;align-items:center;gap:8px}button,select{font-family:var(--font-ui);font-weight:600;font-size:.95rem;color:var(--text);background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-button);padding:9px 16px;min-height:44px;cursor:pointer;transition:background var(--speed-ui) ease-out,border-color var(--speed-ui) ease-out,transform var(--speed-ui) ease-out;box-shadow:inset 0 1px #f4e9d812}button:hover:not(:disabled),select:hover{background:#46372a;border-color:#6b5539}button:active:not(:disabled){transform:translateY(1px) scale(.98)}button:focus-visible,select:focus-visible,input[type=range]:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:disabled{opacity:.35;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#221a13}button.primary:hover:not(:disabled){background:#ffc16e;border-color:#ffc16e}select{-webkit-appearance:none;-moz-appearance:none;appearance:none;padding-right:34px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23b39c7d' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}#mute[aria-pressed=true]{color:var(--muted);border-style:dashed}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:130px;height:6px;border-radius:3px;background:var(--line);cursor:pointer}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:var(--accent);border:none;transition:transform var(--speed-ui) ease-out}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--accent);border:none}#status{margin:0;min-height:1.5rem;color:var(--accent);font-weight:700}#sidebar{display:flex;flex-direction:column;gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:18px 20px}.card h2{margin:0 0 8px;font-family:var(--font-display);font-weight:600;font-size:1.1rem;color:var(--accent)}.card p{margin:0 0 10px;color:var(--muted);font-size:.92rem}#input-hints{margin:0;padding:0;list-style:none;color:var(--muted);font-size:.92rem;display:flex;flex-direction:column;gap:6px}#input-hints strong{color:var(--text)}#shortcut-list{margin:0;display:flex;flex-direction:column;gap:8px}#shortcut-list div{display:flex;align-items:center;gap:12px}#shortcut-list dt{font-family:var(--font-display);font-weight:600;background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:2px 10px;min-width:34px;text-align:center}#shortcut-list dd{margin:0;color:var(--muted);font-size:.92rem}#solve-speed-label{color:var(--muted);font-size:.85rem;font-weight:700;margin-left:4px}#repo-link{display:flex;align-items:center;gap:16px;max-width:1240px;width:100%;margin:0 auto;padding:0 32px 20px;font-size:.9rem}#repo-link a{color:var(--accent);font-weight:600}.footer-note{color:var(--muted)}.footer-more{margin-left:auto;color:var(--muted);font-size:.85rem}#repo-link .footer-more a{color:var(--muted);font-weight:600;text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--muted) 45%,transparent);text-underline-offset:3px}#repo-link .footer-more a:hover{color:var(--accent)}@media(max-width:960px){main{grid-template-columns:1fr}#brand{flex-wrap:wrap;row-gap:4px;padding:16px 16px 8px}main{padding:4px 16px 16px}#repo-link{padding:0 16px 16px;flex-wrap:wrap;gap:6px}.footer-more{margin-left:0;flex-basis:100%}#board-frame{min-height:0}#wordmark{font-size:1.7rem}#tagline{flex-basis:100%;order:3;font-size:.92rem}#hud{flex-wrap:wrap;gap:8px 20px}.hud-value{font-size:1.05rem;white-space:nowrap}.hud-difficulty{margin-left:0;flex-direction:row;align-items:center;gap:8px;flex-basis:100%}}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}