.panel {
    width: 50%;
    align-self: center;
}

.table {
    font-size: 1em;
}

table > tbody > tr:not(.header-teacher):not(.header-student) > td:nth-child(1) {
    border-bottom: hidden;
}

.header-teacher, .header-student {
    font-weight: bold;
    border-top: hidden;
}

.header-teacher {
    border-left: 0.3em solid lightskyblue;
    border-bottom: 0.2em solid lightskyblue;
}

.header-student {
    border-left: 0.3em solid lightskyblue;
    border-bottom: 0.2em solid lightskyblue;
}

table > tbody > tr > td:nth-child(1) {
    width: 5em;
}