body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

header {
    background-color: #000;
    color: #fff;
    text-align: center;
    padding: 20px 10px;
}

.logo {
    max-width: 300px;
    height: auto;
    margin-bottom: 10px;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px 15px;
}

.selector {
    background-color: #fff;
    border: 1px solid #ccc;
    padding: 30px;
    text-align: center;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.button {
    display: block;
    background-color: #333;
    color: #fff;
    padding: 15px;
    margin: 10px 0;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #555;
}

@media screen and (max-width: 600px) {
    .button {
        font-size: 16px;
        padding: 12px;
    }
}