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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.status-panel {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.status-item:last-child {
    border-bottom: none;
}

.status-label {
    font-weight: 600;
    color: #555;
}

.status-value {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.status-value.success {
    background: #d4edda;
    color: #155724;
}

.status-value.error {
    background: #f8d7da;
    color: #721c24;
}

.status-value.warning {
    background: #fff3cd;
    color: #856404;
}

.test-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.test-section h2 {
    margin-bottom: 20px;
    color: #333;
    font-size: 1.5rem;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.test-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px 15px;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.test-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.test-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.test-btn.large {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: center;
    gap: 10px;
    padding: 15px 30px;
}

.btn-icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.test-btn.large .btn-icon {
    margin-bottom: 0;
}

.btn-text {
    font-weight: 600;
}

.interactive-tests {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.test-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.test-item label {
    font-weight: 600;
    color: #555;
}

.test-item input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.test-item input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.test-item input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.results-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: #555;
}

.result-value {
    font-weight: 500;
    color: #333;
}

.info-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.info-section h2 {
    margin-bottom: 20px;
    color: #333;
    font-size: 1.5rem;
}

.device-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.info-item:last-child {
    border-bottom: none;
}

.info-item strong {
    color: #555;
    min-width: 120px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .button-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 10px;
    }
    
    .test-btn {
        padding: 15px 10px;
    }
    
    .btn-icon {
        font-size: 1.2rem;
    }
    
    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .info-item strong {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .button-grid {
        grid-template-columns: 1fr;
    }
    
    .status-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}

/* Анимации */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.test-btn:active {
    animation: pulse 0.2s ease-in-out;
}

/* Стили для состояний загрузки */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Стили для успешного воспроизведения */
.playing {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%) !important;
    animation: pulse 0.3s ease-in-out;
}