.btn {
    display: inline-block;
    padding: 0.5em 1em;
    font-size: 1em;
    font-weight: bold;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 4px;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(38, 143, 255, 0.5);
}