header{
    margin: 1em auto .5em;
    text-align: center;
}

.site-meta{
    display: block;
    text-align: center;
}

/* 3_header.css の .site-meta a と .site-meta a::first-letter を削除して、これに置換 */
.site-meta a{
    display: inline-flex;
    align-items: center;
    font-size: 1.5em;
    text-transform: uppercase;
}

.site-meta .site-initial{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 0;
    top: -2px;
    font-size: 1em;
    width: 1.25em;
    height: 1.25em;
    line-height: 1.25em;
    color: #fff;
    -webkit-text-fill-color: #fff;
    font-family: Georgia, 'Times New Roman', Times, serif;
    margin-right: 8px;
}

.site-meta .site-initial::before{
    content: "";
    position: absolute;
    border-radius: 4px;
    inset: 0;
    background: linear-gradient(90deg, #5b75d0, #d54a68);
    transform: rotate(45deg);
    z-index: -1;
}

.site-meta .site-rest{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1em;
    background: linear-gradient(90deg, #4564d4, #cb4864);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    font-weight: bold;
    text-decoration: underline 1px;
    text-underline-offset: 4px;
}

.site-meta a::first-letter{
    font-style: italic;
    background-color: #7c88b4;
    color: #fff;
    -webkit-text-fill-color: #fff; /* これが必要 */
    padding: 1.5em;
    font-size: 3em;
    border-radius: 50%;
}

@media screen and (min-width: 1180px){
    header{
        margin: 1em 0 0;
        padding: 0 2em;
        text-align: center;
        max-width: 1300px;
        margin-left: auto;
        margin-right: auto;
    }

    .site-meta a{
        font-size: 2em;
    }
}