.vvb-body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    overflow-x: hidden;
}

.vvb-main-wrapper {
    display: block;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.vvb-content-area {
    width: 100%;
}

.vvb-container {
    max-width: 100%;
    margin: 0;
    display: block;
}

.vvb-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.vvb-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.vvb-card:last-child {
    margin-bottom: 0;
}

.vvb-header-card {
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
}

.vvb-header-title {
    font-size: 2.5em;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.vvb-header-subtitle {
    font-size: 1.1em;
    color: #666;
    font-weight: 400;
}

.vvb-card-title {
    font-size: 1.4em;
    font-weight: 600;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #667eea;
    padding-bottom: 8px;
}

.vvb-file-section {
    margin-bottom: 20px;
}

.vvb-file-button {
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 12px;
}

.vvb-file-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.vvb-file-button:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.vvb-file-info {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 8px;
    font-size: 0.9em;
    color: #555;
    border-left: 4px solid #667eea;
}

.vvb-video-info {
    background: #e8f4f8;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85em;
    color: #666;
}

.vvb-volume-section {
    margin: 20px 0;
}

.vvb-volume-display {
    text-align: center;
    font-size: 2em;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 15px;
}

.vvb-volume-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #ddd;
    outline: none;
    margin-bottom: 10px;
    -webkit-appearance: none;
    appearance: none;
}

.vvb-volume-slider::-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);
    transition: all 0.2s ease;
}

.vvb-volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    background: #5a6fd8;
}

.vvb-volume-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.9em;
    color: #666;
    margin-bottom: 10px;
}

.vvb-volume-info {
    text-align: center;
    margin-bottom: 20px;
}

.vvb-volume-info small {
    color: #666;
    font-style: italic;
    font-size: 0.8em;
}

.vvb-action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vvb-preview-button {
    padding: 12px 20px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

.vvb-preview-button:hover {
    background: #218838;
    transform: translateY(-1px);
}

.vvb-process-button {
    padding: 12px 20px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.vvb-process-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.vvb-save-button {
    padding: 12px 20px;
    background: #17a2b8;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

.vvb-save-button:hover {
    background: #138496;
    transform: translateY(-1px);
}

.vvb-preview-container {
    background: #f0f0f0;
    border-radius: 8px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    overflow: hidden;
}

.vvb-preview-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.vvb-preview-placeholder {
    color: #888;
    font-size: 1em;
    text-align: center;
}

.vvb-save-notification {
    color: #4CAF50;
    text-align: center;
    padding: 20px;
}

.vvb-save-notification h3 {
    margin: 0 0 10px 0;
    font-size: 1.2em;
    color: #4CAF50;
}

.vvb-save-notification p {
    margin: 5px 0;
    color: #333;
}

.vvb-progress-section {
    margin-top: 20px;
}

.vvb-progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.vvb-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.vvb-progress-fill.vvb-indeterminate {
    background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
    background-size: 200% 100%;
    animation: vvb-indeterminate 2s infinite linear;
}

@keyframes vvb-indeterminate {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.vvb-progress-text {
    text-align: center;
    color: #666;
    font-weight: 500;
}

.vvb-status-card {
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.vvb-status-icon {
    font-size: 1.2em;
    color: #667eea;
}

.vvb-status-text {
    flex: 1;
    font-weight: 500;
}

.vvb-usage-guide {
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.vvb-usage-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.vvb-step {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.vvb-step-number {
    background: #667eea;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9em;
    flex-shrink: 0;
}

.vvb-step-content h3 {
    margin: 0 0 8px 0;
    color: #333;
    font-size: 1.1em;
    font-weight: 600;
}

.vvb-step-content p {
    margin: 0;
    color: #666;
    font-size: 0.95em;
    line-height: 1.5;
}

.vvb-ad-space {
    min-height: 90px;
    margin: 15px 0;
    display: block;
    clear: both;
}

.vvb-ad-space-top {
    margin-bottom: 20px;
}

.vvb-ad-space-bottom {
    margin-top: 20px;
}

.vvb-ad-space-sidebar,
.vvb-ad-space-sidebar-right {
    display: none;
}

@media (max-width: 768px) {
    .vvb-main-wrapper {
        padding: 10px;
    }
    
    .vvb-header-title {
        font-size: 2em;
    }
    
    .vvb-card {
        padding: 16px;
    }
    
    .vvb-step {
        flex-direction: column;
        text-align: center;
    }
    
    .vvb-step-number {
        align-self: center;
    }
}