header {
    height: auto;
    margin-top: 0;
}

#site-navigation p {
    font-family: var(--font_family);
    font-weight: lighter;
    letter-spacing: 0.04em;
    font-size: 1.4em;
}

#site-navigation #menu>a:hover {
    color: var(--main_color);
}

#site-navigation #primary-menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

#site-navigation a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    width: 100%;
    padding: 5px;
    padding-right: 30px;
}

#social-buttons {
    margin: 0;
    padding: 0;
}

#social-buttons ul {
    list-style: none;
    display: flex;
    flex-direction: row;
    padding: 0;
    padding-right: 30px;
    justify-content: space-around;
    margin: 0;
    font-size: 20px;
}

#social-buttons a img {
    height: 0.875em;
    margin-bottom: 2px;
    filter: brightness(30%) sepia(30%) saturate(30%);
}

/* SP */

@media screen and (max-width: 767px) {
    .grid {
        width: 100%;
        min-width: 0;
        margin-left: 0;
        margin-right: 0;
        padding-left: 10px;
        padding-right: 10px;
    }

    #content {
        text-align: center;
    }

    .site-branding {
        padding-right: 0;
        display: flex;
        align-items: center;
        position: relative;
        padding: 0;
    }

    .site-branding span {
        display: block;
        font-size: 25px;
        position: absolute;
        right: 0;
        margin-right: 10px;
    }

    .site-title {
        max-width: 70px;
    }

    .site-branding h1 {
        margin: 0;
    }

    .site-branding h3 {
        font-size: 1.6em;
        margin-bottom: 0;
        margin-left: .6em;
        border-bottom: 0;
        padding: 0;
        margin-top: 0;
        font-family: var(--font_family);
    }

    .open span {
        transform: rotate(180deg);
    }

    #masthead .follow-nav {
        padding: 0;
        max-width: none;
        z-index: 99;
        background: #fff;
        position: fixed;
        width: 100%;
        margin: 0;
        top: 0;
    }

    #masthead .follow-nav .site-branding-nav {
        overflow: scroll;
        display: block;
    }

    #site-navigation #primary-menu .menu {
        padding: 5px 0;
    }

    #site-navigation .sp-a {
        display: flex;
        justify-content: space-between;
        align-items: baseline;
        width: 100%;
        padding-right: 0px;
    }

    #site-navigation #primary-menu>li>a {
        padding: 0;
    }

    #site-navigation {
        padding: 0;
        margin-top: 0;
        height: auto;
        margin: 1em;
    }

    #site-navigation .sub-menu {
        list-style: none;
        display: block;
        z-index: 100;
        margin: 0;
        border-left: 3px solid var(--main_color);
        padding-inline-start: 10px;
        margin-left: 15px;
    }

    .follow-nav #social-buttons {
        width: 100%;
        margin-bottom: 20px;
        max-width: 250px;
        margin: 0 auto;
        margin-bottom: 20px;
    }

    .follow-nav #social-buttons ul {
        padding-right: 0;
    }
}

/* PC */

@media (min-width: 767px) {
    .site-branding h3 {
        font-size: 2em;
        margin-bottom: 0;
        border-bottom: 0;
        padding: 0;
        margin-top: 0;
        font-family: var(--font_family);
    }

    #menu {
        width: 100%;
        position: relative;
        float: left;
    }

    #site-navigation .sub-menu {
        list-style: none;
        display: block;
        width: 80%;
        position: absolute;
        float: left;
        left: 100%;
        top: 0;
        background: var(--main_color);
        z-index: 100;
        margin: 0;
        padding-left: 20px;
    }

    #masthead {
        max-width: 250px;
    }

    .site-branding {
        padding-right: 20px;
    }

    #site-navigation {
        padding: 0;
        margin-top: 3em;
        height: 250px;
    }

    #site-navigation .sub-menu a {
        color: #fff;
        font-size: 13px;
    }
}