*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:#f5f5f5;color:#333;line-height:1.6}.app{min-height:100vh;padding:2rem}.game-container{max-width:1200px;margin:0 auto}.game-header{text-align:center;margin-bottom:2rem}.game-header h1{font-size:2.5rem;color:#2c3e50;margin-bottom:.5rem}.game-status{font-size:1.1rem;color:#666}.game-content{display:grid;grid-template-columns:1fr;gap:2rem}@media (min-width: 768px){.game-content{grid-template-columns:1fr 1fr}}.color-section,.leaderboard-section{background:white;border-radius:12px;padding:1.5rem;box-shadow:0 2px 8px #0000001a}.color-display{width:100%;height:250px;border-radius:8px;margin-bottom:1.5rem;transition:background-color .3s ease}.guess-form{display:flex;flex-direction:column;gap:1rem}.rgb-inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-group label{font-size:1.1rem;font-weight:500;color:#666}.input-group input{padding:.75rem;border:2px solid #e2e8f0;border-radius:6px;font-size:1rem;transition:border-color .2s ease;width:100%}.input-group input:focus{outline:none;border-color:#3b82f6}.submit-button,.play-again-button{padding:.75rem 1.5rem;border:none;border-radius:6px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s ease}.submit-button{background-color:#3b82f6;color:#fff;margin-top:1rem}.submit-button:hover{background-color:#2563eb}.play-again-button{background-color:#10b981;color:#fff}.play-again-button:hover{background-color:#059669}.error-message{margin-top:1rem;padding:.75rem;background-color:#fee2e2;border:1px solid #ef4444;border-radius:6px;color:#b91c1c;font-size:.9rem;animation:fadeIn .3s ease}.answer-feedback{margin-top:1.5rem;padding:1rem;background-color:#f0f9ff;border-radius:6px;animation:fadeIn .3s ease}.answer-feedback p{margin-bottom:.5rem;font-family:monospace;font-size:1.1rem}.answer-feedback p:last-child{margin-top:1rem;font-weight:600;color:#2563eb}.leaderboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.leaderboard-header h{}