body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

nav {
    margin-bottom: 20px;
    padding: 10px 0;
    border-bottom: 1px solid #ccc;
}

nav button {
    margin-right: 10px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
    margin: 20px 0;
}

input, button {
    padding: 8px;
    font-size: 16px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    padding: 10px 20px;
}

button:hover {
    background-color: #0056b3;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
    opacity: 0.7;
}

button:disabled:hover {
    background-color: #cccccc;
}

#video-list, #experiment-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.video-item, .experiment-item {
    border: 1px solid #ccc;
    padding: 15px;
    border-radius: 5px;
}

.video-item video {
    width: 100%;
    margin-bottom: 10px;
}

#video-selector {
    border: 1px solid #ccc;
    padding: 10px;
    margin: 10px 0;
    max-height: 300px;
    overflow-y: auto;
}

.video-selector-item {
    padding: 10px;
    margin: 5px 0;
    background: #f0f0f0;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.video-selector-item input[type="checkbox"] {
    margin-right: 10px;
}

.video-selector-item:hover {
    background: #e0e0e0;
}

.video-info {
    margin-top: 10px;
}

.video-name {
    margin-bottom: 5px;
}

.video-export-links {
    display: flex;
    gap: 10px;
}

.export-link {
    color: #007bff;
    text-decoration: none;
    padding: 5px 10px;
    border: 1px solid #007bff;
    border-radius: 4px;
    font-size: 14px;
}

.export-link:hover {
    background-color: #007bff;
    color: white;
    text-decoration: none;
}