/* =====================================================
   HEADER STYLES (app + pages)
   File: header.css
   Scoped to avoid conflicts; complements chrome.css & app.css
   ===================================================== */

/* container */
:is(.app-header, .site-header) {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    backdrop-filter: saturate(140%) blur(8px);
}
:is(.app-header, .site-header) a {
    text-decoration: none;
}

/* brand (scoped) */
:is(.app-header, .site-header) .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
}
:is(.app-header, .site-header) .brand strong {
    font-weight: 700;
    letter-spacing: 0.2px;
}
:is(.app-header, .site-header) .brand .badge {
    background: var(--surface);
    color: var(--muted);
    padding: 2px 6px;
    border-radius: 999px;
    font-size: 11px;
    border: 1px solid var(--border);
}
.brand-full {
    display: inline;
}
.brand-abbr {
    display: none;
}

/* nav (SCOPED to header to avoid global .nav collisions) */
:is(.app-header, .site-header) .nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 10px;
    white-space: nowrap;
}
:is(.app-header, .site-header) .nav a:hover,
:is(.app-header, .site-header) .nav a.active {
    color: var(--text);
    background: var(--surface);
}

/* pages mobile nav popover (header-pages) */
@media (max-width: 860px) {
    :is(.app-header, .site-header) .nav-toggle {
        display: inline-grid;
        place-items: center;
        width: 38px;
        height: 38px;
        border-radius: 12px;
        border: 1px solid var(--border);
        background: var(--panel);
        color: var(--text);
    }
    :is(.app-header, .site-header) .nav {
        position: absolute;
        right: 12px;
        top: 60px;
        display: none;
        flex-direction: column;
        background: var(--panel);
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 8px;
        box-shadow: var(--shadow);
        max-width: calc(100vw - 24px);
    }
    :is(.app-header, .site-header) .nav.open {
        display: flex;
    }
    :is(.app-header, .site-header) .nav a {
        width: 100%;
    }
}

/* mobile: bigger touch targets + brand abbreviation */
@media (max-width: 980px) {
    .brand-full {
        display: none;
    }
    .brand-abbr {
        display: inline;
    }
}

/* PAGES-ONLY (mobile) override */
@media (max-width: 980px) {
    .app-header[data-scope="pages"] .controls .label {
        display: none;
    }
    .app-header[data-scope="pages"] .controls .icon {
        width: 16px;
        height: 16px;
        font-size: 16px;
    }
    .app-header[data-scope="pages"] .controls .icon-btn {
        height: 38px;
        min-width: 38px;
        padding: 0 8px;
        border-radius: 12px;
    }
}