.ce-sample-button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #2c3e50;
    color: #ffffff;
    text-decoration: none;
    border-radius: 3px;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.ce-sample-button:hover,
.ce-sample-button:focus {
    filter: brightness(0.9);
    color: #ffffff;
    text-decoration: none;
}