:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100vh;background:#0a0a0a;color:#fafafa}.shell{min-height:100vh;display:grid;place-items:center;padding:2rem;background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,.08) 0%,transparent 60%),#0a0a0a}.game-container{display:flex;flex-direction:column;align-items:center;gap:1.5rem}h1{margin:0;font-size:1.75rem;font-weight:700;letter-spacing:-.03em;background:linear-gradient(135deg,#a5b4fc,#818cf8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stats-bar{display:flex;gap:2rem;font-size:.85rem;color:#ffffff8c}.stats-bar span{font-variant-numeric:tabular-nums}.stats-bar strong{color:#ffffffd9;font-weight:600}.board{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:8px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:12px}.tile{width:80px;height:80px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;font-weight:700;border-radius:8px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:transform .12s ease,background .15s ease,box-shadow .15s ease;background:linear-gradient(145deg,#6366f140,#6366f11f);border:1px solid rgba(99,102,241,.2);color:#c7d2fe}.tile:hover{transform:scale(1.04);background:linear-gradient(145deg,#6366f159,#6366f12e);box-shadow:0 0 20px #6366f126}.tile:active{transform:scale(.97)}.tile.correct{background:linear-gradient(145deg,#34d39940,#34d3991a);border-color:#34d39940;color:#6ee7b7}.tile.empty{background:transparent;border:1px dashed rgba(255,255,255,.06);cursor:default}.tile.empty:hover{transform:none;box-shadow:none}.controls{display:flex;gap:.75rem}.btn{padding:.6rem 1.5rem;border:1px solid rgba(99,102,241,.3);background:#6366f11f;color:#a5b4fc;border-radius:8px;font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s ease;letter-spacing:.01em}.btn:hover{background:#6366f138;border-color:#6366f173;box-shadow:0 0 16px #6366f11f}.btn:active{transform:scale(.97)}.win-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;background:#000000b3;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:10;animation:fadeIn .3s ease}.win-card{text-align:center;padding:2.5rem 3rem;background:#0f0f19f2;border:1px solid rgba(99,102,241,.3);border-radius:16px;box-shadow:0 0 60px #6366f126;animation:scaleIn .35s ease}.win-card h2{margin:0 0 .5rem;font-size:1.5rem;background:linear-gradient(135deg,#34d399,#6ee7b7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.win-card p{color:#fff9;margin-bottom:1.5rem;font-size:.9rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@media(max-width:420px){.tile{width:64px;height:64px;font-size:1.15rem}.board{gap:4px;padding:6px}}