* {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.btn {
    background-color: #0081cb;
    color: #fff;
    padding: 12px 16px;
    border: none;
    outline: none;
    font-size: 16px;
    margin: 20px;
    cursor: pointer;
}

.btn:hover {
    background-color: RoyalBlue;
}