/* ==========================================================================
   Header Network — Two-row site header with network navigation
   /css/frontend/header-network.css
   Layer 5 — requires tokens.css, base.css, layout.css, components.css
   ========================================================================== */

:root {
    --header-height: 92px;
}

.site-header {
    padding: 0;
}

/* Row 1: Logo + Priority Sites */
.site-header__row-1 {
    padding: 8px 0;
}

.site-header__row-1 .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-header__logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-accent);
}

.site-header__logo-mark {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    color: var(--color-accent);
    transition: opacity var(--transition-fast);
}

.site-header__logo:hover .site-header__logo-mark {
    opacity: 0.8;
}

.site-header__logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.site-header__logo:hover .site-header__logo-text {
    color: var(--color-accent-hover);
}

.site-header__priority {
    display: flex;
    align-items: center;
    gap: 16px;
}

.site-header__priority-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-header__priority-link:hover {
    color: var(--color-accent-hover);
}

/* Row 2: Network Nav Bar */
.site-header__row-2 {
    display: flex;
    align-items: center;
    padding: 8px var(--spacing-4);
    max-width: var(--width-container);
    margin: 0 auto;
    width: 100%;
    gap: 8px;
}

.site-header__scroll-btn {
    flex-shrink: 0;
    width: var(--size-touch-target);
    height: var(--size-touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border: 1px solid var(--color-accent-subtle);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: var(--text-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.site-header__scroll-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-accent-subtle);
}

.site-header__scroll-btn[hidden] {
    display: none;
}

.site-header__nav-scroll {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.site-header__nav-scroll::-webkit-scrollbar {
    display: none;
}

.site-header__nav-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    padding: 0 4px;
}

.site-header__nav-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border: 1px solid var(--color-accent-subtle);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.site-header__nav-pill:hover {
    color: var(--color-accent-hover);
    background: var(--color-accent-subtle);
}

/* More dropdown */
.site-header__nav-pill--more {
    position: relative;
    flex-shrink: 0;
}

.site-header__more-trigger {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    border: 1px solid var(--color-accent-subtle);
    border-radius: var(--radius-full);
    cursor: pointer;
    user-select: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.site-header__more-trigger:hover {
    color: var(--color-accent-hover);
    background: var(--color-accent-subtle);
}

.site-header__more-trigger .site-header__more-arrow {
    display: inline-block;
    transition: transform var(--transition-fast);
}

.site-header__more-trigger.is-open .site-header__more-arrow {
    transform: rotate(180deg);
}

/* Detached to <body> at runtime (see app.js) to escape .site-header__nav-scroll's
   overflow-y: hidden clipping; positioned via fixed top/right set by JS. */
.site-header__more-dropdown {
    position: fixed;
    z-index: var(--z-dropdown);
    min-width: 180px;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-dropdown), 0 0 0 1px var(--color-accent-subtle);
    padding: var(--spacing-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.site-header__more-dropdown::before {
    content: '';
    position: absolute;
    top: -5px;
    right: 20px;
    width: 9px;
    height: 9px;
    background: var(--color-bg-surface);
    border-left: 1px solid var(--color-border);
    border-top: 1px solid var(--color-border);
    transform: rotate(45deg);
}

.site-header__more-dropdown.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-header__dropdown-link {
    display: block;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.site-header__dropdown-link:hover {
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.site-header__dropdown-link:focus-visible {
    outline: none;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    box-shadow: var(--shadow-ring-accent);
}

.site-header__dropdown-link + .site-header__dropdown-link {
    margin-top: 2px;
}

/* Mobile: hide scroll buttons, keep dropdown */
@media (max-width: 768px) {
    .site-header__scroll-btn {
        display: none;
    }

    .site-header__row-2 {
        padding: 8px var(--spacing-3);
    }
}