body {
            margin: 0;
            padding: 0;
            background: #000;
            color: #0f0;
            font-family: monospace;
            overflow: hidden;
            width: 100vw;
            height: 100vh;
            position: relative;
        }

        #visualizer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            font-size: 10px;
            line-height: 1;
            white-space: pre;
            overflow: hidden;
            letter-spacing: 0;
            margin: 0;
            padding: 0;
            text-shadow: 0 0 10px currentColor, 0 0 20px currentColor, 0 0 30px currentColor;
            z-index: 1;
            font-family: 'Courier New', monospace;
        }

        .controls {
            position: absolute;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            text-align: center;
            background: rgba(0, 0, 0, 0.8);
            padding: 20px;
            border-radius: 10px;
            backdrop-filter: blur(10px);
            box-shadow: 0 0 30px rgba(0, 255, 0, 0.3);
        }

        input[type="file"] {
            display: none;
        }

        .btn {
            background: #0f0;
            color: #000;
            border: none;
            padding: 10px 20px;
            margin: 5px;
            cursor: pointer;
            font-family: monospace;
            font-size: 16px;
            font-weight: bold;
            text-transform: uppercase;
            transition: all 0.3s;
            box-shadow: 0 0 10px #0f0;
        }

        .btn:hover {
            background: #fff;
            box-shadow: 0 0 20px #0f0, 0 0 40px #0f0;
            transform: scale(1.05);
        }

        .btn.active {
            background: #f00;
            color: #fff;
            box-shadow: 0 0 20px #f00;
            animation: pulse 1s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 20px #f00; }
            50% { box-shadow: 0 0 40px #f00, 0 0 60px #f00; }
            100% { box-shadow: 0 0 20px #f00; }
        }

        .btn.active:hover {
            background: #ff0;
            color: #000;
        }

        .info {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 14px;
            opacity: 0.9;
            text-align: center;
            z-index: 100;
            background: rgba(0, 0, 0, 0.8);
            padding: 10px 20px;
            border-radius: 5px;
            text-shadow: 0 0 5px #0f0;
        }

        .mode-selector {
            margin-top: 10px;
        }

        select {
            background: #000;
            color: #0f0;
            border: 2px solid #0f0;
            padding: 5px 10px;
            font-family: monospace;
            font-size: 14px;
            cursor: pointer;
            box-shadow: 0 0 5px #0f0;
        }

        select:hover {
            box-shadow: 0 0 10px #0f0;
        }

        .source-indicator {
            margin-top: 10px;
            font-size: 14px;
            color: #ff0;
            text-shadow: 0 0 10px #ff0;
            animation: glow 2s ease-in-out infinite;
        }

        .lolcat-toggle {
            margin-top: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .toggle-switch {
            position: relative;
            width: 50px;
            height: 25px;
            background: #333;
            border: 2px solid #0f0;
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .toggle-switch.active {
            background: linear-gradient(to right, #f00, #ff0, #0f0, #0ff, #00f, #f0f);
            box-shadow: 0 0 20px #ff0;
        }

        .toggle-slider {
            position: absolute;
            top: 2px;
            left: 2px;
            width: 17px;
            height: 17px;
            background: #0f0;
            border-radius: 50%;
            transition: all 0.3s;
        }

        .toggle-switch.active .toggle-slider {
            left: 27px;
            background: #fff;
            box-shadow: 0 0 10px #fff;
        }

        .lolcat-label {
            color: #0f0;
            font-size: 14px;
            font-weight: bold;
            text-transform: uppercase;
        }

        .lolcat-mode #visualizer {
            animation: rainbow-text var(--rainbow-speed) linear infinite;
        }

        @keyframes rainbow-text {
            0% { color: #f00; filter: brightness(var(--audio-brightness)); }
16.67% { color: #ff0; filter: brightness(var(--audio-brightness)); }
           33.33% { color: #0f0; filter: brightness(var(--audio-brightness)); }
           50% { color: #0ff; filter: brightness(var(--audio-brightness)); }
           66.67% { color: #00f; filter: brightness(var(--audio-brightness)); }
           83.33% { color: #f0f; filter: brightness(var(--audio-brightness)); }
           100% { color: #f00; filter: brightness(var(--audio-brightness)); }
       }

       @keyframes glow {
           0% { text-shadow: 0 0 10px #ff0; }
           50% { text-shadow: 0 0 20px #ff0, 0 0 30px #ff0; }
           100% { text-shadow: 0 0 10px #ff0; }
       }

       .error-message {
           position: absolute;
           top: 50%;
           left: 50%;
           transform: translate(-50%, -50%);
           background: #f00;
           color: #fff;
           padding: 20px;
           display: none;
           font-size: 16px;
           box-shadow: 0 0 20px #f00;
           z-index: 200;
       }