/* ==========================================================================
   header.css — Minimal static dark bar (no scroll-shift)
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--s-16);
}

/* --- Wordmark ------------------------------------------------------------- */
.site-header__logo {
    font-family: var(--f-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--c-text);
    text-decoration: none;
    flex-shrink: 0;
}

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

/* --- Nav ------------------------------------------------------------------ */
.site-header__nav {
    display: none;
    align-items: center;
    gap: var(--s-24);
}

.site-header__link {
    font-family: var(--f-body);
    font-weight: 500;
    font-size: 0.8125rem;
    color: var(--c-text-dim);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
}

.site-header__link:hover,
.site-header__link.is-active {
    color: var(--c-text);
}

/* Utility links (desktop only) */
.site-header__utility {
    display: none;
    align-items: center;
    gap: var(--s-24);
    margin-left: var(--s-32);
    padding-left: var(--s-32);
    border-left: 1px solid var(--c-border);
}

/* --- Hamburger ------------------------------------------------------------ */
.site-header__hamburger {
    display: flex;
    align-items: center;
    gap: var(--s-8);
    background: none;
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    cursor: pointer;
    padding: var(--s-8) var(--s-12);
    transition: background var(--dur) var(--ease);
}

.site-header__hamburger:hover {
    background: var(--c-surface);
}

.site-header__hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 18px;
    height: 18px;
}

.site-header__hamburger-icon span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--c-text);
    transition: transform var(--dur) var(--ease);
}

.site-header__hamburger-label {
    font-family: var(--f-body);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--c-text-dim);
}

/* Open state */
.site-header__hamburger.is-open {
    background: var(--c-surface);
}

.site-header__hamburger.is-open .site-header__hamburger-icon span:first-child {
    transform: translateY(3.5px) rotate(45deg);
}

.site-header__hamburger.is-open .site-header__hamburger-icon span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
}

/* --- Mobile menu ---------------------------------------------------------- */
.site-header__mobile-menu {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--c-bg);
    border-top: 1px solid var(--c-border);
    padding: var(--s-32) var(--s-16);
    overflow-y: auto;
    z-index: 99;
}

.site-header__mobile-menu.is-open {
    display: block;
}

.site-header__mobile-link {
    display: block;
    font-family: var(--f-body);
    font-weight: 500;
    font-size: 1rem;
    color: var(--c-text-dim);
    padding: var(--s-12) 0;
    border-bottom: 1px solid var(--c-border);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
}

.site-header__mobile-link:hover {
    color: var(--c-text);
}