* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Arial Black', sans-serif;
            background: linear-gradient(135deg, #0a0a0a 0%, #1a0000 50%, #0a0a0a 100%);
            color: #e0e0e0;
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        /* Efecto de fondo animado */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 50%, rgba(220, 0, 0, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 50, 0, 0.1) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px;
        }

        /* Header con efecto metálico */
        header {
            text-align: center;
            margin-bottom: 40px;
            animation: flickerIn 1s ease-in;
        }

        @keyframes flickerIn {
            0%, 10%, 20% { opacity: 0; }
            30% { opacity: 1; }
            40% { opacity: 0; }
            50% { opacity: 1; }
            100% { opacity: 1; }
        }

        h1 {
            font-size: 3.5em;
            background: linear-gradient(45deg, #ff3300, #ffaa00, #ff3300);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 20px rgba(255, 50, 0, 0.5);
            letter-spacing: 3px;
            font-weight: 900;
            text-transform: uppercase;
            margin-bottom: 10px;
            filter: drop-shadow(0 0 10px #ff3300);
        }

        .subtitle {
            font-size: 1.1em;
            color: #cc0000;
            letter-spacing: 2px;
            text-transform: uppercase;
            font-weight: bold;
            margin-top: 5px;
        }

        /* Card principal */
        .card {
            background: linear-gradient(135deg, #1a1a1a 0%, #2d0000 100%);
            border: 3px solid #ff3300;
            border-radius: 8px;
            padding: 30px;
            margin-bottom: 25px;
            box-shadow: 0 0 30px rgba(255, 50, 0, 0.3), inset 0 0 30px rgba(255, 50, 0, 0.1);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 200, 0, 0.3), transparent);
            animation: shine 3s infinite;
            pointer-events: none;
        }

        @keyframes shine {
            0% { left: -100%; }
            50% { left: 100%; }
            100% { left: 100%; }
        }

        .card-title {
            font-size: 1.8em;
            color: #ffaa00;
            margin-bottom: 20px;
            text-transform: uppercase;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .card-title::before {
            content: '⚡';
            font-size: 1.2em;
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        /* Inputs y controles */
        .control-group {
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }

        label {
            display: block;
            margin-bottom: 8px;
            color: #ffaa00;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.95em;
        }

        input[type="text"],
        input[type="file"],
        select {
            width: 100%;
            padding: 12px 15px;
            background: #0a0a0a;
            border: 2px solid #ff3300;
            color: #e0e0e0;
            font-family: 'Arial Black', sans-serif;
            border-radius: 4px;
            font-size: 1em;
            transition: all 0.3s ease;
            box-shadow: 0 0 10px rgba(255, 50, 0, 0.2);
        }

        input[type="text"]:focus,
        input[type="file"]:focus,
        select:focus {
            outline: none;
            border-color: #ffaa00;
            box-shadow: 0 0 20px rgba(255, 170, 0, 0.5), inset 0 0 10px rgba(255, 170, 0, 0.1);
            background: #1a1a1a;
        }

        input[type="file"]::file-selector-button {
            background: linear-gradient(135deg, #ff3300, #ffaa00);
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            color: #000;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        input[type="file"]::file-selector-button:hover {
            transform: scale(1.05);
            box-shadow: 0 0 15px rgba(255, 170, 0, 0.8);
        }

        /* Grid de controles */
        .controls-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 20px;
        }

        @media (max-width: 600px) {
            .controls-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Botones */
        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 25px;
            flex-wrap: wrap;
        }

        button {
            flex: 1;
            min-width: 150px;
            padding: 12px 20px;
            background: linear-gradient(135deg, #ff3300, #ffaa00);
            color: #000;
            border: none;
            border-radius: 4px;
            font-weight: bold;
            font-size: 1.05em;
            text-transform: uppercase;
            letter-spacing: 1px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-family: 'Arial Black', sans-serif;
            box-shadow: 0 5px 15px rgba(255, 50, 0, 0.4);
            position: relative;
            overflow: hidden;
        }

        button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        button:hover::before {
            left: 100%;
        }

        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255, 170, 0, 0.6);
        }

        button:active {
            transform: translateY(-1px);
        }

        button:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: linear-gradient(135deg, #333, #555);
            color: #e0e0e0;
            box-shadow: 0 5px 15px rgba(100, 100, 100, 0.4);
        }

        .btn-secondary:hover {
            box-shadow: 0 8px 25px rgba(200, 200, 200, 0.4);
        }

        /* Área de estado */
        .status-box {
            background: #0a0a0a;
            border: 2px solid #ffaa00;
            border-radius: 4px;
            padding: 15px;
            margin-top: 20px;
            display: none;
            box-shadow: 0 0 15px rgba(255, 170, 0, 0.3);
        }

        .status-box.show {
            display: block;
            animation: slideDown 0.3s ease;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .status-box.success {
            border-color: #00cc00;
            background: rgba(0, 100, 0, 0.2);
        }

        .status-box.error {
            border-color: #cc0000;
            background: rgba(100, 0, 0, 0.2);
        }

        .status-box.loading {
            border-color: #ffaa00;
            background: rgba(100, 50, 0, 0.2);
        }

        .status-text {
            color: #ffaa00;
            font-weight: bold;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .status-box.success .status-text {
            color: #00cc00;
        }

        .status-box.error .status-text {
            color: #cc0000;
        }

        /* Spinner de carga */
        .spinner {
            display: inline-block;
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255, 170, 0, 0.3);
            border-top-color: #ffaa00;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Reproductor de audio */
        .audio-player {
            background: linear-gradient(135deg, #1a1a1a 0%, #2d0000 100%);
            border: 2px solid #ffaa00;
            border-radius: 4px;
            padding: 20px;
            margin-top: 20px;
            display: none;
            box-shadow: 0 0 15px rgba(255, 170, 0, 0.3);
        }

        .audio-player.show {
            display: block;
            animation: slideDown 0.3s ease;
        }

        .audio-player audio {
            width: 100%;
            margin-bottom: 15px;
        }

        .audio-info {
            color: #ffaa00;
            font-size: 0.9em;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .download-btn {
            width: 100%;
            margin-top: 10px;
        }

        /* Validación */
        .error-message {
            color: #cc0000;
            font-size: 0.9em;
            margin-top: 5px;
            display: none;
            animation: shake 0.4s ease;
        }

        .error-message.show {
            display: block;
        }

        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-5px); }
            75% { transform: translateX(5px); }
        }

        /* Info adicional */
        .info-box {
            background: rgba(255, 170, 0, 0.1);
            border-left: 4px solid #ffaa00;
            padding: 15px;
            margin-top: 20px;
            border-radius: 4px;
            font-size: 0.95em;
            color: #e0e0e0;
        }

        .info-box strong {
            color: #ffaa00;
        }

        /* Responsive */
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5em;
            }

            .card {
                padding: 20px;
            }

            .button-group {
                flex-direction: column;
            }

            button {
                min-width: auto;
            }
        }