:root{--tile-gap: 4px;--tile-radius: 6px;--board-bg: #1a1a2e;--tile-bg: #16213e;--tile-border: #0f3460;--tile-text: #e8e8e8;--accent: #e94560;--empty-bg: rgba(15, 52, 96, .5)}*{box-sizing:border-box}body{margin:0;font-family:Outfit,sans-serif;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);min-height:100vh;color:#f5f5f5;-webkit-tap-highlight-color:transparent}.wrapper{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:12px}.level-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;text-align:center}.level-screen h1{font-size:clamp(1.75rem,5vw,2.5rem);margin:0 0 8px;font-weight:700}.level-screen>p{margin:0 0 24px;opacity:.9;font-size:1rem}.level-buttons{display:flex;flex-direction:column;gap:12px;width:100%;max-width:320px}.level-btn{padding:16px 20px;border:2px solid rgba(255,255,255,.3);border-radius:12px;background:#ffffff14;color:inherit;font-family:inherit;font-size:1rem;cursor:pointer;transition:background .2s,border-color .2s,transform .1s;display:flex;flex-direction:column;align-items:center;text-align:center}.level-btn:hover,.level-btn:focus-visible{background:#ffffff26;border-color:#ffffff80}.level-btn:active{transform:scale(.98)}.level-name{font-weight:700;font-size:1.1rem}.level-desc{font-size:.85rem;opacity:.85;margin-top:4px}.level-header{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:8px}.level-header h1{margin:0}.help-btn{width:32px;height:32px;border-radius:50%;border:2px solid rgba(255,255,255,.4);background:#ffffff1a;color:inherit;font-size:1.1rem;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,border-color .2s;flex-shrink:0}.help-btn:hover,.help-btn:focus-visible{background:#fff3;border-color:#fff9}.help-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:300;padding:20px}.help-overlay.hidden{display:none}.help-modal{background:linear-gradient(145deg,#1a1a2e,#16213e);border:2px solid rgba(255,255,255,.2);border-radius:16px;max-width:420px;width:100%;max-height:90vh;overflow:auto}.help-header{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 12px;border-bottom:1px solid rgba(255,255,255,.15)}.help-header h2{margin:0;font-size:1.35rem}.help-close{width:36px;height:36px;border:none;border-radius:50%;background:#ffffff1a;color:inherit;font-size:1.5rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.help-close:hover{background:#fff3}.help-body{padding:20px}.help-body p{margin:0 0 12px}.help-body ul{margin:0;padding-left:20px}.help-body li{margin-bottom:10px;line-height:1.45}.help-body li:last-child{margin-bottom:0}.game-screen{width:100%;max-width:100%;flex:1;display:flex;flex-direction:column;align-items:center}.game-screen.hidden,.level-screen.hidden{display:none}.header{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;width:100%;max-width:720px}.header h1{font-size:clamp(1.25rem,4vw,1.5rem);margin:0;font-weight:700}.level-badge{padding:4px 10px;border-radius:20px;background:#fff3;font-size:.8rem;font-weight:600}.moves{font-size:.95rem;font-weight:600}.header-actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-left:auto}.btn{padding:8px 14px;border:none;border-radius:8px;background:#ffffff40;color:inherit;font-family:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:background .2s,transform .1s}.btn:hover,.btn:focus-visible{background:#ffffff59}.btn:active{transform:scale(.97)}.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.4)}.btn-ghost:hover{background:#ffffff1a}.btn-large{padding:12px 24px;font-size:1rem}.game-container{flex:1;display:flex;align-items:center;justify-content:center;width:100%;min-height:200px;padding:8px 0}.board{display:grid;gap:var(--tile-gap);padding:10px;background:var(--board-bg);border-radius:12px;box-shadow:0 8px 32px #0006;width:min(92vw,720px);height:min(82vh,720px);max-width:100%;max-height:min(82vh,720px);aspect-ratio:1}.board.size-3{grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr)}.board.size-4{grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr)}.board.size-5{grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(5,1fr)}.tile{display:flex;align-items:center;justify-content:center;background:var(--tile-bg);background-repeat:no-repeat;border:2px solid var(--tile-border);border-radius:var(--tile-radius);color:var(--tile-text);font-weight:700;cursor:pointer;transition:transform .1s,background .15s;min-width:0;min-height:0;overflow:hidden}.tile:hover{background-color:#1f3460;transform:scale(1.02)}.tile.tile-image:hover{background-color:transparent}.tile:active{transform:scale(.98)}.tile.empty{background:var(--empty-bg);border-color:transparent;cursor:default;box-shadow:none}.tile.empty:hover{background:var(--empty-bg);transform:none}.tile.tile-image .tile-num{display:none}.win-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}.win-overlay.hidden{display:none}.win-box{background:linear-gradient(145deg,#1a1a2e,#16213e);border:2px solid rgba(255,255,255,.2);border-radius:16px;padding:32px;text-align:center;max-width:360px}.win-box h2{margin:0 0 8px;font-size:1.75rem;color:var(--accent)}.win-box p{margin:0 0 24px;opacity:.9}.win-actions{display:flex;flex-direction:column;gap:10px}@media(max-width:600px){.header{max-width:100%}.header-actions{width:100%;margin-left:0;justify-content:flex-end}.board{width:min(96vw,420px);height:min(78vh,96vw,420px);max-height:min(78vh,96vw,420px);padding:6px}.tile.tile-image .tile-num{display:none}}