* {
    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%);
    color: #333;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

#app {
    padding: 40px;
}

.section {
    margin-bottom: 40px;
    padding: 30px;
    background: #f8f9fa;
    border-radius: 12px;
    border: 2px solid #e9ecef;
}

.section h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.8em;
}

.hidden {
    display: none !important;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.voices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.voice-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.voice-card:hover {
    border-color: #667eea;
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.2);
}

.voice-card.selected {
    border-color: #667eea;
    background: #f0f4ff;
}

.voice-card h3 {
    color: #667eea;
    margin-bottom: 10px;
}

.voice-card audio {
    width: 100%;
    margin-top: 10px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #495057;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 16px;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

#timeline-blocks {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.timeline-block {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.timeline-block-info {
    flex: 1;
}

.timeline-block-info h4 {
    color: #667eea;
    margin-bottom: 5px;
}

.timeline-block-actions {
    display: flex;
    gap: 10px;
}

.block-item {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.block-item h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.block-item .block-content {
    margin: 15px 0;
}

.block-item textarea {
    width: 100%;
    min-height: 100px;
    padding: 10px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}

.block-item audio {
    width: 100%;
    margin: 15px 0;
}

.block-item .track-info {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
}

.block-item .track-info strong {
    color: #667eea;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border: 1px solid #c3e6cb;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    border: 1px solid #f5c6cb;
}

#session-info {
    margin-top: 20px;
    padding: 15px;
    background: #e7f3ff;
    border-radius: 8px;
    border: 1px solid #b3d9ff;
}

#session-info strong {
    color: #667eea;
}

#mix-result {
    margin-top: 20px;
}

#mix-result audio {
    width: 100%;
    margin-top: 15px;
}