header {
    top: 0;
    background: black;
    padding: 5px;
    color: white;
    margin-bottom: 20px;
}

header h2 {
    margin: 0;
}

.about {
    margin-bottom: 20px;
}

.profile {
    padding: 0 30px;
}

.profile h3 {
    border-top: black double 4px;
    border-bottom: black solid 2px;
    padding: 3px;
    margin: 20px auto;
    width: 100%;
    max-width: 800px;
}

.profile img {
    width: 100%;
    max-width: 400px;
}

table {
    margin: auto;
    width: 100%;
    max-width: 600px;
    border-collapse: collapse;
}

th, td {
    border: 4px #8f4400 ridge;
}

/* スマホ用設定 (768px以下) */
@media screen and (max-width: 768px) {
    .about {
        font-size: 10pt;
    }

    h3 {
        font-size: 12pt;
    }
}