body {
    font-family: Arial, sans-serif;
    background: #ffffff;
    padding: 20px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 10px;
    table-layout: fixed;
}

th, td {
    border: 1px solid #bbb;
    padding: 10px;
    text-align: center;
    vertical-align: middle;
    border-radius: 15px;
    transition: background 0.3s;
}

th {
    background-color: #a8e6a1;
    color: #0b3d91;
    font-weight: bold;
}

td:first-child {
    background-color: #a8e6a1;
    font-weight: bold;
}

.lesson {
    background-color: #ffffff;
    color: #0b3d91;
}

.lesson:hover {
    background-color: #a8e6a1;
    cursor: pointer;
}