body {
    font-family: 'M PLUS Rounded 1c', sans-serif;
    font-weight: 400;
    background-color: #ebfaf3;
    color: #222222;
}

.contents {
    margin: 10px auto;
}

.header {
    width: 30%;
    max-width: 350px;
    margin: 0 auto 30px auto;
    font-size: 1.0em;
}

.header h1 {
    /* background-color: #fefbd8; */
    text-align: center;
    font-weight: 800; /* extrabold */
    padding: 5px 30px;
    border: double 5px #dcdb97;
}

.rounded-icon {
    width: 100%;
}

.rounded-icon img {
    width: 100%;
    margin: 0 auto;
    border-radius: 50%;
}

ul > li > a {
    font-weight: 700; /* bold */
    font-size: 2.0em;
}

ul > ul {
    font-size: 1.3em;
    margin-bottom: 20px;
}

.main-content {
    width: 80%;
    margin: 0 auto 30px auto;
    max-width: 800px;
}

a {
    color: #618685;
}
a:hover {
    color: #80ced6;
}

.sns {
    width: 30%;
    max-width: 200px;
    margin: 0 auto;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
}

.sns li {
    list-style: none;
    width: calc(100%/3);
    padding: 0 10px;
    box-sizing: border-box;
}

.sns li img {
    max-width: 100%;
    height: auto;
}

.sns li img:hover {
    opacity: 50%;
}