.waveform-canvas { width: 100%; height: 200px; background-color: #0a1a2a; border-radius: 12px; margin-top: 15px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); display: block; }
        .control-panel { background-color: #f8fafc; border-radius: 16px; padding: 1.5rem; margin: 1.5rem 0; border: 1px solid #e2e8f0; }
        .noise-type-selector { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 1.5rem; justify-content: center; }
        .noise-btn { padding: 8px 16px; border-radius: 40px; font-weight: 600; transition: all 0.2s; border: 1px solid #cbd5e1; background: white; font-size: 0.85rem; }
        .noise-btn.active { background: #0d6efd; color: white; border-color: #0d6efd; box-shadow: 0 4px 12px rgba(13,110,253,0.3); }
        .random-btn { background: linear-gradient(135deg, #6f42c1, #d63384); color: white; border: none; }
        .random-btn:hover { transform: scale(1.02); filter: brightness(1.05); }
        .volume-slider { width: 100%; }
        .status-indicator { display: inline-block; width: 12px; height: 12px; border-radius: 50%; background-color: #6c757d; margin-right: 8px; vertical-align: middle; }
        .status-indicator.playing { background-color: #198754; box-shadow: 0 0 6px #198754; animation: pulse 1.2s infinite; }
        @keyframes pulse { 0% { opacity: 0.4; transform: scale(0.8);} 100% { opacity: 1; transform: scale(1.2);} }
        .science-card { background: #ffffff; border-radius: 20px; padding: 1.5rem; margin: 1.8rem 0; border: 1px solid #eef2f6; }
        .accent-border { border-left: 4px solid #0d6efd; background-color: #f1f5f9; padding: 1rem; border-radius: 0 12px 12px 0; }
        .feature-badge { background-color: #e9ecef; padding: 0.3rem 0.8rem; border-radius: 30px; font-size: 0.75rem; display: inline-block; margin: 0.2rem; }