html, body {
    width: 100%;
    min-width: 50em;
    text-align: center;
    font-family: sans-serif;
    font-size: larger;
}

.timetable {
    margin: 0 auto;
    padding: 0;
    width: 70%;
    border: 3px solid darkblue;
    border-collapse: collapse;
}

.timetable th {
    background: darkblue;
    border: 3px solid darkblue;
    color: white;

}

.timetable td {
    text-align: left;
}

.substitution th {
    background: darkred;
}

.col_day {
    font-size: large;
    font-weight: bold;
    padding: 0.5em 0 0.5em 2em;
}

.col_schedule {
    font-size: large;
    padding: 0.5em 0;
}

.section_contact {
    text-align: left;
    margin: 0 10%;
}

.address {
    font-size: medium;
    float: left;
    width: 50%;
}

.address h4 {
    font-size: larger;
    margin-top: 0;
}

.main_contact {
    padding-bottom: 1em;
}

.contact {
    padding: 1em 0;
    border-top: 1px dotted black;
}

.vacation {
    margin-bottom: 2em;
    margin-top: 2em;
}

.substitution_note {
    margin-bottom: 1em;
}

.underline {
    text-decoration: underline;
}