/*============================
#js-header
============================*/
header#js-header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.2) 60%, rgba(0,0,0,0) 100%);
    z-index: 10;
}
header#js-header div.inner {
    display: flex;
    justify-content: space-between;
    padding: 36px 24px;
    align-items: center;
    position: relative;
    box-sizing: border-box;
    @media screen and (max-width:640px){
        padding: 12px;
    }
}
header#js-header div.inner h1 {
}
header#js-header div.inner h1 a {
    display: block;
    padding-left: 56px;
    background: no-repeat left center url(../img/logo_kagoshima_university.svg);
    text-decoration: none;
    color: #fff;
    line-height: 1.25;
}
header#js-header div.inner h1 a span.sub {
    @media screen and (max-width:640px){
        /* 2026-09-13 スマホで大きすぎたため 14px → 12px */
        font-size: 12px;
    }
}
header#js-header div.inner h1 a span.main {
    font-size: 1.25rem;
    font-weight: bold;
    display: block;
    @media screen and (max-width:640px){
        /* 2026-09-13 スマホで大きすぎたため 16px → 14px */
        font-size: 14px;
    }
}

/*============================
#js-nav
============================*/
header#js-header div.inner nav#js-nav.menu-content {
}

/*============================
#js-menu-trigger
============================*/
header#js-header div.inner nav#js-nav.menu-content h2#js-menu-trigger.menu-trigger {
    display: none;
    text-indent: -9999px;
    width: 64px;
    height: 64px;
    background: no-repeat center url(../img/header_menu_open.svg);
    position: absolute;
    right: 20px;
    top: 20px;
    z-index: 20;
    @media screen and (max-width: 1280px) {
        display: block;
    }
    @media screen and (max-width: 640px) {
        top: 0;
    }
}
header#js-header.js-open div.inner nav#js-nav.menu-content h2#js-menu-trigger.menu-trigger {
    background: no-repeat center url(../img/header_menu_close.svg);
}
header#js-header div.inner nav#js-nav.menu-content ul.menu-list {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 16px;
    @media screen and (max-width: 1280px) {
        transform: translateY(-100%);
        position: fixed;
        gap: 40px;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        /* display: none; */
        flex-direction: column;
        justify-content: center;
        background: rgba(0, 0, 0, 0.8);
        opacity: 0;
        transition: opacity 0.4s ease;
    }
}
header#js-header.js-open div.inner nav#js-nav.menu-content ul.menu-list {
    @media screen and (max-width: 1280px) {
        transform: translateY(0%);
        display: flex;
        opacity: 1;
    }
}
header#js-header div.inner nav#js-nav.menu-content ul.menu-list li {
}
header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a {
    text-decoration: none;
    color: #fff;
}

/* テキストリンクは下線が左からスッと伸びるホバー */
header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a:not(.link-sponsor):not(.link-contact) {
    padding-bottom: 2px;
    background: no-repeat left bottom / 0 1px linear-gradient(#fff, #fff);
    transition: background-size 0.3s ease;
}

header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a:not(.link-sponsor):not(.link-contact):hover {
    background-size: 100% 1px;
}

header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a.link-sponsor {
    border: solid 1px #d4a574;
    color: #d4a574;
    border-radius: 24px;
    padding: 6px;
    text-align: center;
    min-width: 168px;
    display: block;
    background: no-repeat left center / 0% 100% linear-gradient(#d4a574, #d4a574);
    transition: background-size 0.4s ease, color 0.4s ease;
}

header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a.link-sponsor:hover {
    background-size: 100% 100%;
    color: #000;
}

header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a.link-contact {
    background: no-repeat left center / 0% 100% linear-gradient(#d4a574, #d4a574) #fff;
    color: #000;
    border-radius: 24px;
    padding: 6px;
    text-align: center;
    min-width: 168px;
    display: block;
    transition: background-size 0.4s ease;
}

header#js-header div.inner nav#js-nav.menu-content ul.menu-list li a.link-contact:hover {
    background-size: 100% 100%;
}