body {
    width: 95%;
    margin: auto;
}
h1 {
    font-size: 1.8em;
    margin-bottom: 0px;
}

h2 {
    margin-top: 0px;
    font-size: 1.2em;
}

table {
    margin-left: 10px;
    margin-top:20px;
    border-spacing: 5px;
    line-height: 1.3em;
}
td {
    background-color: #e6ffdc;
    padding: 5px 10px 5px 10px;
}

.colonne_date {
    min-width: 200px;
}

.colonne_cours {
    min-width: 200px;
}

.colonne_notes {
    width: 100%;
}