body {
    font-family: Calibri, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #FFFFFF;
    color: #333;
}

header {
    background-color: #9400D3;
    color: Snow;
    padding: 20px;
    text-align: center;
}

main {
    margin: 20px;
    text-align: center;
}

button {
    background-color: #9400D3;
    color: white;
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background-color: #2ECC71;
}

.inline_elem {
    display: inline-block;
}