#viewer-wrapper {
    position: relative;
}

#button-container {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 100;
}

.custom-button {
    background-color: #333;
    color: white;
    border: 1px solid #555;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    font-size: 12px;
}

.custom-button:hover:not(:disabled) {
    background-color: #555;
}

.custom-button:disabled {
    background-color: #222;
    color: #666;
    cursor: not-allowed;
}

#format-selector {
    min-width: 120px;
}

#conversion-status {
    font-style: italic;
}