@media (max-width: 760px) {
    :root:has(.app-primary-nav) {
        --header-height: 64px;
        scroll-padding-bottom: calc(88px + env(safe-area-inset-bottom));
    }
    body:has(.app-primary-nav) { padding-bottom: calc(80px + env(safe-area-inset-bottom)); }
    .site-header:has(.app-primary-nav) .site-header__inner { grid-template-rows: 64px; }
    .site-header .app-primary-nav {
        position: fixed;
        inset: auto 0 0;
        z-index: 45;
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-row: auto;
        grid-column: auto;
        gap: 4px;
        width: 100%;
        height: calc(72px + env(safe-area-inset-bottom));
        margin: 0;
        padding: 6px 10px calc(6px + env(safe-area-inset-bottom));
        border-top: 1px solid #e5ddd1;
        background: #fffaf2;
        box-shadow: 0 -4px 20px rgba(44, 65, 54, .06);
    }
    .site-header .app-primary-nav > a {
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        min-width: 0;
        min-height: 60px;
        padding: 5px 2px;
        border-radius: 12px;
        font-size: 11px;
        line-height: 1.2;
    }
    .site-header .app-primary-nav > a > i { font-size: 21px; }
    .site-header .app-primary-nav > a.active { background: #e9ecdf; color: #315b44; }
    .site-header .app-primary-nav > a.active > span::after { display: none; }
    body:has(.app-primary-nav) .reading-notice { bottom: calc(88px + env(safe-area-inset-bottom)); }
}