/* =============================================================
   Site header — custom top bar.
   Ported from the mockup (.topbar in phileas.css); colour/font
   tokens mapped to the theme's style.css :root variables.
   No Bootstrap navbar JS: the mobile drawer and search panel are
   pure-CSS checkbox toggles.

   Breakpoints snap to Bootstrap:
     - lg 991.98px  → mobile drawer (mockup used 1000px)
     - sm 575.98px  → hide social + divider (mockup used 600px)
   Loaded as the 'pifmag-header' handle (depends on 'pifmag-style').
   ============================================================= */

.site-header.topbar {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    -webkit-backdrop-filter: saturate(1.1) blur(8px);
    backdrop-filter: saturate(1.1) blur(8px);
    border-bottom: 1px solid var(--rule);
}

.site-header .topbar__inner {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 70px;
    /*max-width: 1240px;*/
    /*margin-inline: auto;*/
    /*padding-inline: clamp(20px, 5vw, 72px);*/
    position: relative;
}

/* Toggles are visually hidden inputs that drive the drawer/search. */
.site-header .pif-nav-toggle,
.site-header .pif-search-toggle {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

/* ---------- Brand / logo ---------- */
.site-header .brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-right: auto;
    text-decoration: none;
}

.site-header .brand img,
.site-header .custom-logo {
    display: block;
    height: 58px;
    width: auto;
    object-fit: contain;
}

.site-header .custom-logo-link {
    display: block;
    line-height: 0;
}

/* All themeable type props moved to utilities on the .brand-name element in
   header.php: fs-lg (19→18) t-ink (color) ff-title fw-600 fst-italic ls-tight.
   Nothing themeable remains here; rule removed. */

/* ---------- Primary nav (mobile-first: drawer is the base) ----------
   Base (< lg 992px): fixed slide-down drawer, column menu, burger visible.
   @992px: static inline nav with underline hover, burger hidden. */
.site-header .nav {
    display: flex;
    align-items: center;
    position: fixed;
    inset: 70px 0 auto 0;
    z-index: 1029;
    padding: 6px 24px 18px;
    background: var(--surface);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 18px 36px -14px rgba(10, 30, 60, .22);
    transform: translateY(-110%);
    visibility: hidden;
    transition: transform .28s ease, visibility .28s;
}

.site-header .nav .menu {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-header .pif-nav-toggle:checked ~ .nav {
    transform: translateY(0);
    visibility: visible;
}

.site-header .nav a {
    position: relative;
    display: block;
    padding: 14px 6px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: .02em;
    white-space: normal;
    text-decoration: none;
    color: var(--ink);
    opacity: .82;
    border-bottom: 1px solid var(--rule);
}

.site-header .nav li:last-child a {
    border-bottom: 0;
}

.site-header .nav a:hover {
    opacity: 1;
}

.site-header .nav .current-menu-item > a,
.site-header .nav .current_page_item > a,
.site-header .nav .current-menu-ancestor > a {
    opacity: 1;
}

/* ---------- Social (hidden below sm 576px) ---------- */
/* Social + divider are hidden below sm (576px); revealed at @576 below. */
.site-header .topbar__social,
.site-header .topbar__divider {
    display: none;
}

.site-header .topbar__social ul {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-header .topbar__social a {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    color: var(--muted);
    transition: background .2s, color .2s;
}

.site-header .topbar__social a:hover {
    background: var(--accent);
    color: #fff;
}

.site-header .topbar__social svg {
    width: 18px;
    height: 18px;
}

.site-header .topbar__divider {
    width: 1px;
    height: 24px;
    background: var(--rule-strong);
}

/* ---------- Search ---------- */
.site-header .search {
    display: inline-grid;
    place-items: center;
    flex: none;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--rule-strong);
    color: var(--ink);
    cursor: pointer;
    transition: background .2s, color .2s;
}

.site-header .search:hover,
.site-header .pif-search-toggle:checked ~ .search {
    background: var(--ink);
    color: var(--paper);
}

.site-header .topbar__search {
    position: absolute;
    top: 70px;
    right: clamp(20px, 5vw, 72px);
    z-index: 1031;
    width: min(360px, calc(100vw - 40px));
    padding: 14px;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: 12px;
    box-shadow: 0 18px 36px -14px rgba(10, 30, 60, .22);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease, visibility .2s;
    background: color-mix(in srgb, var(--paper) 88%, transparent);
    -webkit-backdrop-filter: saturate(1.1) blur(8px);
    backdrop-filter: saturate(1.1) blur(8px);
}

.site-header .pif-search-toggle:checked ~ .topbar__search {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.topbar__search button[type="submit"] {
    align-items: center;
    gap: 9px;
    white-space: nowrap;
    font-family: var(--font-ui);
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: .02em;
    border-top-right-radius: 999px;
    border-bottom-right-radius: 999px;
    cursor: pointer;
    transition: transform .15s, background .2s, color .2s;
    background: var(--accent);
    color: var(--accent-ink);
    width: 105px;
    border: none;
    outline: none;
}

.topbar__search form input[type="search"] {
    background: rgba(255, 255, 255, .1);
    color: var(--ink);
    min-width: 0;
    flex: 1;
    padding: 13px 18px;
    border-top-left-radius: 999px;
    border-bottom-left-radius: 999px;
    font-size: 14.5px;
    height: 48px;
    color: var(--ink);
    outline: none;
    border: 1px solid rgba(17, 36, 68, .5);
}

.topbar__search form input[type="search"]:focus {
    outline: none;
    box-shadow: none;
}

/* ---------- Burger (mobile-first: visible until lg, hidden @992) ---------- */
.site-header .menu-btn {
    display: inline-grid;
    place-items: center;
    flex: none;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 1px solid var(--rule-strong);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    transition: background .2s, color .2s, border-color .2s;
}

.site-header .menu-btn:hover,
.site-header .pif-nav-toggle:checked ~ .menu-btn {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.site-header .menu-btn svg {
    transition: transform .25s ease;
}

.site-header .pif-nav-toggle:checked ~ .menu-btn svg {
    transform: rotate(90deg);
}

.site-header .search:focus-visible,
.site-header .menu-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ===== sm (576px+): show social + divider (mockup 600 → Bootstrap 576) ===== */
@media (min-width: 576px) {
    .site-header .topbar__social {
        display: block;
    }

    .site-header .topbar__divider {
        display: block;
    }
}

/* ===== lg (992px+): inline nav, hide burger (mockup 1000 → Bootstrap 992) ===== */
@media (min-width: 992px) {
    .site-header .nav {
        position: static;
        inset: auto;
        z-index: auto;
        padding: 0;
        background: none;
        border-bottom: 0;
        box-shadow: none;
        transform: none;
        visibility: visible;
        transition: none;
    }

    .site-header .nav .menu {
        flex-direction: row;
        align-items: center;
        gap: 26px;
        width: auto;
    }

    .site-header .nav a {
        padding: 4px 0;
        font-size: 13px;
        white-space: nowrap;
        border-bottom: 0;
    }

    .site-header .nav a::after {
        content: "";
        position: absolute;
        left: 0;
        right: 100%;
        bottom: -2px;
        height: 1.5px;
        background: var(--accent);
        transition: right .25s ease;
    }

    .site-header .nav a:hover::after {
        right: 0;
    }

    .site-header .nav .current-menu-item > a::after,
    .site-header .nav .current_page_item > a::after,
    .site-header .nav .current-menu-ancestor > a::after {
        right: 0;
    }

    .site-header .menu-btn {
        display: none;
    }
}