.button, button, input[type="submit"] {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.3s ease;
}
.button:hover, button:hover, input[type="submit"]:hover {
    background-color: var(--secondary-color);
}