/* ==========================================================================
   Header -- Dark bar, nav links, 18+ badge, hamburger, mobile overlay
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
    z-index: 100;
    transition: border-color var(--dur) var(--ease);
}

.header--scrolled {
    border-bottom-color: var(--c-accent);
}

.header__inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: var(--s-32);
}

.header__brand {
    font-family: var(--f-heading);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--c-text);
    text-decoration: none;
    flex-shrink: 0;
}

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

.header__nav {
    flex: 1;
}

.header__nav-list {
    display: flex;
    gap: var(--s-24);
}

.header__nav-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);
}

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

.header__utility {
    display: flex;
    gap: var(--s-16);
}

.header__utility-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);
}

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

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--s-16);
}

.header__age-badge {
    display: flex;
    align-items: center;
}

.header__age-badge img {
    width: 24px;
    height: 24px;
}

/* Hamburger */
.header__hamburger {
    width: 24px;
    height: 20px;
    position: relative;
    background: none;
    border: none;
    padding: 0;
}

.header__hamburger span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--c-text);
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.header__hamburger span:nth-child(1) { top: 0; }
.header__hamburger span:nth-child(2) { top: 9px; }
.header__hamburger span:nth-child(3) { top: 18px; }

/* Mobile overlay */
.header__mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--c-bg);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.header__mobile-nav--open {
    opacity: 1;
    visibility: visible;
}

.header__mobile-nav-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--s-48);
}

.header__mobile-close {
    position: absolute;
    top: var(--s-20);
    right: var(--s-24);
    font-size: 2rem;
    color: var(--c-text);
    background: none;
    border: none;
    line-height: 1;
}

.header__mobile-list {
    display: flex;
    flex-direction: column;
    gap: var(--s-24);
    text-align: center;
}

.header__mobile-list a {
    font-family: var(--f-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--c-text);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
}

.header__mobile-list a:hover {
    color: var(--c-accent);
}