.container {
    display: grid;
    row-gap: 60px;
}
h1.ttl {
    padding: 150px 0px 0px 0px;
    color: #0a2882;
}
.preface {
    font-family: 'Noto Sans Japanese', sans-serif;
    font-size: 16px;
    text-align: justify;
}
.interns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    -webkit-column-gap: 2em;
    -moz-column-gap: 2em;
    column-gap: 2em;
    row-gap: 2em;
    font-family: 'Noto Sans Japanese', sans-serif;
}
.intern {
    display: block;
    position: relative;
    background-color: #ddd;
}
.intern:nth-child(7n + 1) {
    background-color: #ff9a91;
}
.intern:nth-child(7n + 2) {
    background-color: #5ed3eb;
}
.intern:nth-child(7n + 3) {
    background-color: #aaf261;
}
.intern:nth-child(7n + 4) {
    background-color: #ff99c3;
}
.intern:nth-child(7n + 5) {
    background-color: #73e6bf;
}
.intern:nth-child(7n + 6) {
    background-color: #fff159;
}
.intern:nth-child(7n) {
    background-color: #f2a9f2;
}
.intern:before {
    content: '';
    display: block;
    position: absolute;
    top: -0.4em;
    left: -0.4em;
    width: 100%;
    height: 100%;
    border: 2px solid #000;
    -webkit-transition: all 0.2s;
    -o-transition: all 0.2s;
    transition: all 0.2s;
    pointer-events: none;
}
.intern:hover:before {
    top: 0;
    left: 0;
}
.intern__tags {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-column-gap: 0.4em;
    -moz-column-gap: 0.4em;
    column-gap: 0.4em;
    row-gap: 0.4em;
    margin-bottom: 1em;
}
.intern__tag {
    padding: 0 0.4em;
    margin: 0;
    font-size: 14px;
    font-weight: bold;
    background-color: #fff;
    border: 1px solid #000;
    border-radius: 4px;
}
.intern__tag:first-child {
    background-color: #000;
    color: #fff;
}
.intern__title {
    font-size: 20px;
    font-weight: bold;
}
.intern__text {
    font-size: 14px;
    text-align: justify;
}
.intern a {
    display: block;
    padding: 1em;
}
.entry-btn {
    display: block;
    width: 100%;
    max-width: 420px;
    padding: 1em;
    margin: 0 auto;
    font-family: 'Noto Sans Japanese', sans-serif;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    background-color: #0472e0;
    color: #fff;
    border: 2px solid #0472e0;
    -webkit-transition: all 0.2s;
    -o-transition: all 0.2s;
    transition: all 0.2s;
}
.entry-btn:hover {
    background-color: #fff;
    color: #0472e0;
}
@media screen and (min-width: 640px) {
    .preface {
        text-align: center;
    }
}
@media screen and (min-width: 768px) {
    .interns {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}