*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif}#root{width:100%;min-height:100vh}body{margin:0;background:linear-gradient(135deg,#667eea,#764ba2);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;min-height:100vh;display:flex;align-items:center;justify-content:center}.app{text-align:center;padding:20px}h1{color:#fff;font-size:3rem;margin-bottom:20px;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.game-info{display:flex;justify-content:space-between;align-items:center;max-width:500px;margin:0 auto 30px;padding:15px;background:#ffffff1a;border-radius:10px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.current-player{color:#fff;font-size:1.2rem;font-weight:700}.player-1{color:#ff4757}.player-2{color:#feca57}.winner{color:#fff;font-size:1.5rem;font-weight:700;animation:pulse 1s infinite}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.reset-btn{padding:10px 20px;background:#ff6b6b;color:#fff;border:none;border-radius:25px;cursor:pointer;font-weight:700;transition:all .3s ease}.reset-btn:hover{background:#ee5a52;transform:translateY(-2px)}.board{display:inline-block;background:#2c5aa0;padding:20px;border-radius:20px;box-shadow:0 10px 30px #0000004d;border:5px solid #1e3a73}.column-headers{display:grid;grid-template-columns:repeat(7,60px);gap:5px;margin-bottom:10px}.column-btn{background:#fff3;border:none;border-radius:10px;color:#fff;font-size:20px;height:40px;cursor:pointer;transition:all .3s ease}.column-btn:hover:not(:disabled){background:#ffffff4d;transform:translateY(-2px)}.column-btn:disabled{opacity:.5;cursor:not-allowed}.grid{display:grid;grid-template-columns:repeat(7,60px);grid-template-rows:repeat(6,60px);gap:5px}.cell{width:60px;height:60px;background:#1e3a73;border-radius:50%;display:flex;align-items:center;justify-content:center;position:relative;border:2px solid #0f1f3d}.cell.empty{background:#4a90c2}.piece{width:45px;height:45px;border-radius:50%;border:3px solid rgba(255,255,255,.3);animation:drop .5s ease-out}@keyframes drop{0%{transform:translateY(-300px);opacity:0}70%{transform:translateY(5px)}to{transform:translateY(0);opacity:1}}.cell.player1 .piece{background:radial-gradient(circle at 30% 30%,#ff6b6b,#ff4757);box-shadow:inset -3px -3px 10px #0000004d}.cell.player2 .piece{background:radial-gradient(circle at 30% 30%,#feca57,#ff9ff3);box-shadow:inset -3px -3px 10px #0000004d}.cell.winning{animation:glow 1s infinite alternate}@keyframes glow{0%{box-shadow:0 0 5px #ffffff80}to{box-shadow:0 0 20px #fffc,0 0 30px #fff9}}