:root {
            --bg-color: #121212; /* Fundo escuro estilo Spotify/Print */
            --card-bg: #181818;
            --primary-green: #1db954;
            --primary-hover: #1ed760;
            --text-white: #ffffff;
            --text-grey: #b3b3b3;
            --border-radius: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Circular', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            justify-content: center;
            align-items: center;
        }

        /* Container Principal */
        .container {
            width: 100%;
            max-width: 600px;
            padding: 20px;
            text-align: center;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }

        /* Header de Status (Estilo do print) */
        .status-header {
            margin-bottom: 20px;
            text-transform: uppercase;
            font-size: 0.9rem;
            letter-spacing: 1px;
            color: var(--text-grey);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .status-dot {
            width: 8px;
            height: 8px;
            background-color: var(--primary-green);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--primary-green);
            animation: pulse 2s infinite;
        }

        /* Vídeo Responsivo */
        .video-wrapper {
            width: 100%;
            aspect-ratio: 16/9;
            background: #000;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.5);
            margin-bottom: 30px;
            border: 1px solid #333;
        }

        .video-wrapper iframe {
            width: 100%;
            height: 100%;
            border: none;
        }

        /* Área do Botão e Instrução */
        .interaction-area {
            width: 100%;
            max-width: 350px;
        }

        .instruction-text {
            font-size: 0.9rem;
            color: var(--text-grey);
            margin-bottom: 15px;
            font-weight: 400;
        }

        /* Botão Segurar */
        .hold-btn-container {
            position: relative;
            width: 100%;
            height: 60px;
            background-color: var(--card-bg);
            border-radius: 30px;
            border: 1px solid #333;
            cursor: pointer;
            overflow: hidden;
            user-select: none;
            transition: border-color 0.3s ease;
            touch-action: manipulation; /* Melhora resposta no mobile */
        }

        .hold-btn-container:hover, .hold-btn-container:active {
            border-color: var(--text-grey);
        }

        .hold-progress {
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            width: 0%;
            background-color: var(--primary-green);
            opacity: 0.8;
            transition: width 0.1s linear;
            z-index: 1;
        }

        .hold-text {
            position: relative;
            z-index: 2;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.5px;
        }

        .feedback-msg {
            margin-top: 15px;
            font-size: 0.85rem;
            color: var(--text-grey);
            height: 20px; /* Reserva espaço */
        }

        /* Rodapé */
        footer {
            width: 100%;
            padding: 20px;
            text-align: center;
            border-top: 1px solid #282828;
            background-color: var(--bg-color);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-grey);
            text-decoration: none;
            font-size: 0.75rem;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--text-white);
            text-decoration: underline;
        }

        .copyright {
            font-size: 0.7rem;
            color: #555;
        }

        @keyframes pulse {
            0% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.2); }
            100% { opacity: 1; transform: scale(1); }
        }

        /* Mobile Adjustments */
        @media (max-width: 480px) {
            .video-wrapper {
                border-radius: 0; /* Full width feel on small mobiles */
            }
            .container {
                padding: 10px;
            }
        }