:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.App{height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1e1e2e,#2a2a3a);font-family:Arial,sans-serif}.tetris-container{position:relative;background:#ffffff0d;border:2px solid rgba(255,255,255,.1);border-radius:12px;padding:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.tetris-game{display:flex;gap:20px;align-items:flex-start}.game-main{display:flex;flex-direction:column}.game-board{display:grid;grid-template-rows:repeat(20,1fr);gap:1px;background:#000;border:3px solid #444;border-radius:8px;padding:4px;width:300px;height:600px}.board-row{display:grid;grid-template-columns:repeat(10,1fr);gap:1px}.board-cell{aspect-ratio:1;border:1px solid rgba(255,255,255,.1);border-radius:2px;transition:all .2s ease}.board-cell.empty{background:#1a1a1a}.board-cell.filled{border:2px solid rgba(255,255,255,.3);box-shadow:inset 0 0 4px #fff3;animation:blockAppear .2s ease-out}@keyframes blockAppear{0%{transform:scale(.8);opacity:.7}to{transform:scale(1);opacity:1}}.board-cell.clearing{animation:lineClear .3s ease-in-out}@keyframes lineClear{0%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.1)}to{opacity:0;transform:scale(.8)}}.game-sidebar{display:flex;flex-direction:column;gap:10px;min-width:200px}.next-piece{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:10px;text-align:center}.next-piece h3{margin:0 0 10px;color:#fff;font-size:14px}.next-piece-display{display:grid;grid-template-rows:repeat(4,1fr);gap:1px;background:#000;border-radius:4px;padding:8px;width:80px;height:80px;margin:0 auto}.next-piece-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px}.next-piece-cell{aspect-ratio:1;border-radius:2px}.next-piece-cell.empty{background:transparent}.next-piece-cell.filled{border:1px solid rgba(255,255,255,.3)}.game-info{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:10px}.game-info h3{margin:0 0 15px;color:#fff;font-size:14px}.info-item{display:flex;justify-content:space-between;margin-bottom:8px;color:#ccc;font-size:12px}.info-item label{font-weight:700}.game-controls{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:8px;padding:10px}.game-controls h3,.game-controls h4{margin:0 0 10px;color:#fff;font-size:14px}.control-buttons{display:flex;flex-direction:column;gap:8px;margin-bottom:15px}.control-buttons button{background:linear-gradient(135deg,#4c1d95,#6d28d9);border:none;color:#fff;padding:8px 16px;border-radius:6px;cursor:pointer;font-size:12px;transition:all .3s ease}.control-buttons button:hover{background:linear-gradient(135deg,#5b21b6,#7c3aed);transform:translateY(-1px)}.control-instructions ul{list-style:none;padding:0;margin:0;color:#999;font-size:11px}.control-instructions li{margin-bottom:4px}.game-overlay{position:absolute;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;border-radius:12px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.menu-screen,.pause-screen,.game-over-screen{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:30px;text-align:center;color:#fff;min-width:250px}.menu-screen h1{margin:0 0 20px;font-size:2.5em;background:linear-gradient(135deg,#ff6b6b,#4ecdc4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:titleGlow 2s ease-in-out infinite alternate}@keyframes titleGlow{0%{text-shadow:0 0 10px rgba(255,107,107,.5);transform:scale(1)}to{text-shadow:0 0 20px rgba(78,205,196,.5);transform:scale(1.05)}}.menu-screen button,.pause-screen button,.game-over-screen button{background:linear-gradient(135deg,#ff6b6b,#4ecdc4);border:none;color:#fff;padding:12px 24px;border-radius:8px;cursor:pointer;font-size:16px;margin:5px;transition:all .3s ease}.menu-screen button:hover,.pause-screen button:hover,.game-over-screen button:hover{transform:translateY(-2px);box-shadow:0 4px 15px #ff6b6b4d}.game-over-screen h2,.pause-screen h2{margin:0 0 20px;font-size:1.8em}.game-over-screen p{margin:10px 0;font-size:14px;color:#ccc}.tetris-container{animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.game-over-screen,.pause-screen,.menu-screen{animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.next-piece-display{animation:pulseNext 3s ease-in-out infinite}@keyframes pulseNext{0%,to{box-shadow:0 0 5px #ffffff1a}50%{box-shadow:0 0 15px #ffffff4d}}