body {
    font-family: sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #007bff;
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    font-size: 1.2rem;
}

main {
    flex: 1;
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.version-list-section, .info-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.version-list-container {
    display: flex;
    gap: 1rem;
    align-items: center;
}

#versionSelector {
    padding: 0.5rem;
    font-size: 1rem;
    flex: 1;
    border: 1px solid #ccc;
    border-radius: 4px;
}

#loadVersionButton {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#loadVersionButton:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

#loadVersionButton:hover:enabled {
    background-color: #218838;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
}

footer p {
    margin: 0;
}