button {
    margin: 10px; 
    font-size: 16px;
}

#divide_line {
    margin: 100px 0;
    border: 5px solid black;
}

.log {
    border: 1px dashed orange;
    font-size: 14px;
    font-family: Arial, Helvetica, sans-serif;
}

.mail_preview {
    border: 1px dashed blue;
    font-size: 14px;
    font-family: Arial, Helvetica, sans-serif;
    /* background-color: white; */
}

input:hover {
    background: rgb(222, 228, 228);
}

input:focus {
    background: rgb(151, 215, 223);
}

a {
    color: blue;
}

/*
a:visited {
    color: red;
}
*/