/* ==================== CONTROLS AND BUTTONS ==================== */
        /* Loading personalizzato */
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 15, 35, 0.95);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .tetris-loader {
            display: flex;
            gap: 4px;
            margin-bottom: 2rem;
        }

        .tetris-block {
            width: 20px;
            height: 20px;
            border-radius: 2px;
            animation: tetrisFall 1.5s ease-in-out infinite;
        }

        .tetris-block:nth-child(1) { background: #64ffda; animation-delay: 0s; }
        .tetris-block:nth-child(2) { background: #2196f3; animation-delay: 0.2s; }
        .tetris-block:nth-child(3) { background: #9c27b0; animation-delay: 0.4s; }
        .tetris-block:nth-child(4) { background: #ff5722; animation-delay: 0.6s; }

        @keyframes tetrisFall {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(20px); }
        }

        .loading-text {
            font-family: 'Orbitron', monospace;
            font-size: 1.5rem;
            color: #64ffda;
            margin-bottom: 1rem;
        }

        .loading-progress {
            color: #78909c;
            font-size: 1rem;
        }

        /* Footer */
        .footer {
            text-align: center;
            padding: 2rem 1rem;
            color: #546e7a;
            font-size: 0.9rem;
        }

        .footer a {
            color: #64ffda;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer a:hover {
            color: #00bcd4;
        }