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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.app-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin: 20px 0;
}

.app-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.app-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: #333;
    margin: 0;
}

.app-header i {
    color: #0d6efd;
    margin-right: 10px;
}

.upload-section {
    margin-bottom: 20px;
}

.form-label {
    font-weight: 500;
    color: #555;
    margin-bottom: 8px;
    display: block;
}

.form-label i {
    color: #0d6efd;
    margin-right: 8px;
}

.form-control,
.form-select {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 10px 15px;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus,
.form-select:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.preview-container {
    display: none;
    background-color: #f8f9fa;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
}

.preview-container.active {
    display: block;
}

.preview-container.collapsed .preview-content {
    display: none;
}

.preview-header {
    padding: 12px 15px;
    cursor: pointer;
    user-select: none;
    font-weight: 500;
    color: #555;
}

.preview-header:hover {
    background-color: #e9ecef;
}

.preview-header i {
    margin-right: 8px;
    width: 12px;
    transition: transform 0.2s;
}

.preview-content {
    padding: 15px;
    border-top: 1px solid #e0e0e0;
}

.preview-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    display: block;
    margin: 0 auto;
}

.preview-content audio {
    width: 100%;
    margin-top: 10px;
}

.preview-info {
    font-size: 0.85rem;
    color: #666;
    margin-top: 10px;
    padding: 10px;
    background-color: #fff;
    border-radius: 4px;
}

.btn {
    padding: 12px 24px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background-color: #0d6efd;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: #0b5ed7;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(13, 110, 253, 0.3);
}

.btn-primary:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-success {
    background-color: #198754;
    color: white;
}

.btn-success:hover {
    background-color: #157347;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(25, 135, 84, 0.3);
}

.btn-outline-secondary {
    border: 1px solid #6c757d;
    color: #6c757d;
    background: white;
}

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

.btn i {
    margin-right: 8px;
}

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

.progress {
    height: 30px;
    border-radius: 6px;
    background-color: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    background-color: #0d6efd;
    font-size: 0.9rem;
    line-height: 30px;
}

.result-section {
    margin-top: 20px;
}

.preview-video {
    width: 100%;
    max-width: 100%;
    border-radius: 6px;
    background-color: #000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.alert {
    padding: 15px 20px;
    border-radius: 6px;
    border: none;
    margin-bottom: 15px;
}

.alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
}

.alert-info {
    background-color: #cff4fc;
    color: #055160;
}

.alert i {
    margin-right: 8px;
}

@media (max-width: 768px) {
    .app-container {
        padding: 20px;
        margin: 10px 0;
    }

    .app-header h1 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 10px 20px;
    }

    body {
        padding: 10px 0;
    }
}

@media (max-width: 576px) {
    .app-container {
        padding: 15px;
        border-radius: 0;
    }

    .app-header h1 {
        font-size: 1.25rem;
    }

    .form-label {
        font-size: 0.9rem;
    }
}