* { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            overflow: hidden; 
            background: #000010;
            font-family: 'Orbitron', 'Segoe UI', sans-serif;
        }
        #game-container { 
            width: 100vw; 
            height: 100vh; 
            position: relative;
        }
        canvas { display: block; }
        
        #ui-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 100;
        }
        
        #score-display {
            position: absolute;
            top: 20px;
            left: 20px;
            color: #00ffff;
            font-size: 28px;
            font-weight: bold;
            text-shadow: 0 0 15px #00ffff, 0 0 30px #00ffff, 0 0 45px #0088ff;
            letter-spacing: 3px;
        }
        
        #powerup-display {
            position: absolute;
            top: 70px;
            left: 20px;
            display: flex;
            gap: 15px;
        }
        
        .powerup-icon {
            width: 60px;
            height: 60px;
            border: 3px solid #ffffff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 20px #ff00ff, inset 0 0 20px rgba(255, 0, 255, 0.3);
            transition: all 0.3s;
            position: relative;
        }
        
        .powerup-icon.active {
            background: rgba(255, 255, 255, 0.9);
            animation: pulse 0.3s infinite;
            box-shadow: 0 0 40px #00ff00, 0 0 60px #00ff00;
        }
        
        .powerup-icon .count {
            position: absolute;
            bottom: -8px;
            right: -8px;
            background: #ff00ff;
            color: white;
            font-size: 14px;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.15); }
        }
        
        #start-screen, #game-over {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            display: none;
            pointer-events: auto;
        }
        
        #start-screen h1, #game-over h1 {
            color: #ffffff;
            font-size: 56px;
            text-shadow: 0 0 40px #00ffff, 0 0 80px #00ffff, 0 0 120px #0088ff;
            margin-bottom: 15px;
            letter-spacing: 8px;
        }
        
        #start-screen h2 {
            color: #ff00ff;
            font-size: 32px;
            text-shadow: 0 0 25px #ff00ff;
            margin-bottom: 40px;
        }
        
        #start-screen p {
            color: #cccccc;
            font-size: 18px;
            margin-bottom: 25px;
            line-height: 2;
        }
        
        #game-over p {
            color: #cccccc;
            font-size: 28px;
            margin-bottom: 40px;
            text-shadow: 0 0 15px #00ffff;
        }
        
        #game-over span {
            color: #00ffff;
            font-weight: bold;
        }
        
        #start-btn, #restart-btn {
            padding: 25px 80px;
            font-size: 28px;
            background: linear-gradient(45deg, #00ffff, #00ff88, #00ffff);
            background-size: 200% 200%;
            border: none;
            border-radius: 40px;
            color: #000;
            font-weight: bold;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 4px;
            transition: all 0.3s;
            pointer-events: auto;
            animation: glow 1.5s ease-in-out infinite, gradientShift 2s ease infinite;
        }
        
        @keyframes glow {
            0%, 100% { box-shadow: 0 0 30px #00ffff, 0 0 60px #00ffff; }
            50% { box-shadow: 0 0 60px #00ffff, 0 0 100px #00ff88, 0 0 150px #0088ff; }
        }
        
        @keyframes gradientShift {
            0%, 100% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
        }
        
        #start-btn:hover, #restart-btn:hover {
            transform: scale(1.15);
        }
        
        #loading {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: #00ffff;
            font-size: 28px;
            text-shadow: 0 0 20px #00ffff;
            animation: pulse 1s infinite;
        }
        
        .controls-hint {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            color: #888;
            font-size: 16px;
            text-shadow: 0 0 10px #666;
        }
        
        #model-status {
            position: absolute;
            bottom: 70px;
            left: 50%;
            transform: translateX(-50%);
            color: #00ff88;
            font-size: 14px;
            text-shadow: 0 0 10px #00ff88;
        }
        
        /* Toast notification */
        #toast {
            position: fixed;
            top: 20px;
            right: 20px;
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            border: 2px solid #00ffff;
            border-radius: 12px;
            padding: 15px 20px;
            color: #ffffff;
            font-size: 14px;
            z-index: 1000;
            box-shadow: 0 0 30px rgba(0, 255, 255, 0.3);
            animation: slideIn 0.5s ease-out, glow 2s ease-in-out infinite;
            max-width: 320px;
        }
        
        #toast a {
            color: #00ffff;
            text-decoration: none;
            font-weight: bold;
            transition: color 0.3s;
        }
        
        #toast a:hover {
            color: #00ff88;
            text-decoration: underline;
        }
        
        #toast .star {
            color: #ffcc00;
            margin-left: 5px;
        }
        
        @keyframes slideIn {
            from {
                transform: translateX(100%);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }
        
        #toast .close-btn {
            position: absolute;
            top: 8px;
            right: 12px;
            background: none;
            border: none;
            color: #888;
            font-size: 18px;
            cursor: pointer;
            pointer-events: auto;
        }
        
        #toast .close-btn:hover {
            color: #ff4444;
        }