html {
    font-size: 100%;
}

h1 {
    font-size: 4rem;
}

h2 {
    font-size: 3rem;
}

h3 {
    font-size: 2rem;
}

table {
    text-align: left;
    padding: 0.5rem;
}

th, td {
    border: 1px solid black;
    padding: 0.5rem;
}

tr {
    border-bottom: 1px solid black;
}

table > caption {
    text-align: left;
}

.test-table th {
    border-bottom: 1px solid black;
    border-left: 1px solid black;
    font-size: 1.5rem;
}