style.css

div[data-testid="element-container"]:has(button[kind="primary"]) button[kind="primary"] {
    background-color: #9f1b4d;
    color: white;
    font-weight: bold;
    border: none;
}
div[data-testid="element-container"]:has(button[kind="primary"]) button[kind="primary"]:hover {
    background-color: #e83277;
    color: white;
}