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

body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

.step {
    margin-bottom: 40px;
    padding: 20px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background-color: #fafafa;
}

h2 {
    color: #4CAF50;
    margin-bottom: 20px;
    font-size: 18px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

input[type="file"] {
    margin-top: 5px;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
}

button:hover {
    background-color: #45a049;
}

.btn-secondary {
    background-color: #666;
}

.btn-secondary:hover {
    background-color: #555;
}

.video-preview {
    margin-top: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 10px;
    background-color: white;
}

video {
    max-width: 100%;
    border-radius: 4px;
}

.segments-container {
    margin-top: 20px;
}

.segment-item {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 10px;
}

.segment-item h3 {
    font-size: 14px;
    margin-bottom: 10px;
    color: #333;
}

.segment-times {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.segment-times input {
    flex: 1;
}

.materials-container {
    margin-top: 20px;
}

.material-item {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.material-info {
    flex: 1;
}

.material-preview {
    width: 100px;
    height: 60px;
    background-color: #f0f0f0;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.material-preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.generated-videos {
    margin-top: 20px;
}

.video-item {
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 10px;
}

.video-item video {
    max-width: 300px;
    margin-top: 10px;
}

.status {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.status-processing {
    background-color: #ffc107;
    color: #333;
}

.status-completed {
    background-color: #28a745;
    color: white;
}

.status-failed {
    background-color: #dc3545;
    color: white;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    margin-top: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: #4CAF50;
    border-radius: 10px;
    transition: width 0.3s ease;
}

.alert {
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.hidden {
    display: none;
}

.nav-tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.nav-tab {
    padding: 10px 20px;
    cursor: pointer;
    border: 1px solid #ddd;
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    margin-right: 5px;
    background-color: #f0f0f0;
}

.nav-tab.active {
    background-color: white;
    border-top: 2px solid #4CAF50;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}