/* wdcnav.css - WDC for Geomagnetism, Kyoto : site-wide navigation bar
 * トップページ(/wdc/ss_top.css の .top-nav)と同じ見た目の共通ナビ。
 * 旧来ページのスタイルを壊さないよう、指定はすべて .wdc-nav 配下に閉じている。
 */
.wdc-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    box-sizing: border-box;
    max-width: 1000px;
    margin: 10px auto 14px;
    padding: 0;
    background: linear-gradient(180deg, #33526b 0%, #24405a 100%);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 12px rgba(0,0,0,0.18);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, "Hiragino Sans", "Noto Sans JP", Meiryo, sans-serif;
    font-size: 15px;
    font-weight: normal;
    line-height: 1.4;
    text-align: center;
}

.wdc-nav * {
    box-sizing: border-box;
}

.wdc-nav ul {
    flex: 1 1 auto;
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    margin: 0;
    padding: 0;
}

.wdc-nav li {
    flex: 1 1 auto;
    list-style: none;
    margin: 0;
    padding: 0;
}

.wdc-nav li + li {
    border-left: 1px solid rgba(255,255,255,0.14);
}

.wdc-nav a:link,
.wdc-nav a:visited {
    display: block;
    padding: 11px 16px;
    color: #eaf2f8;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s;
}

.wdc-nav a:hover {
    background: rgba(255,255,255,0.14);
    color: #fff;
}

.wdc-nav a[aria-current="page"] {
    background: #3498db;
    color: #fff;
    box-shadow: inset 0 -3px 0 rgba(255,255,255,0.45);
}

/* 言語切替: ナビバー右端 */
.wdc-nav a.wdc-nav-lang {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 11px 18px;
    background: rgba(255,255,255,0.10);
    border-left: 1px solid rgba(255,255,255,0.28);
    color: #fff;
    font-weight: 700;
}

.wdc-nav a.wdc-nav-lang::before {
    content: "";
    width: 15px;
    height: 15px;
    flex: 0 0 15px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='1.8'%3E%3Ccircle cx='12' cy='12' r='9.5'/%3E%3Cellipse cx='12' cy='12' rx='4.2' ry='9.5'/%3E%3Cpath d='M2.5 12h19M4.2 6.5h15.6M4.2 17.5h15.6'/%3E%3C/svg%3E");
    opacity: 0.9;
}

.wdc-nav a.wdc-nav-lang:hover {
    background: rgba(255,255,255,0.22);
}

@media (max-width: 768px) {
    .wdc-nav {
        margin: 8px 6px 12px;
        font-size: 14px;
    }
    .wdc-nav ul {
        flex: 1 1 100%;
    }
    .wdc-nav li {
        flex: 1 1 30%;
        border-top: 1px solid rgba(255,255,255,0.14);
    }
    .wdc-nav li:nth-child(-n+3) {
        border-top: none;
    }
    .wdc-nav a:link,
    .wdc-nav a:visited {
        padding: 10px 8px;
    }
    .wdc-nav a.wdc-nav-lang {
        flex: 1 1 100%;
        border-left: none;
        border-top: 1px solid rgba(255,255,255,0.28);
    }
}

@media (max-width: 480px) {
    .wdc-nav li {
        flex: 1 1 50%;
        border-left: none;
        border-top: 1px solid rgba(255,255,255,0.14);
    }
    .wdc-nav li:nth-child(-n+2) {
        border-top: none;
    }
    .wdc-nav li:nth-child(even) {
        border-left: 1px solid rgba(255,255,255,0.14);
    }
}