/* ==========================================================================
   Dubbelbluf — header.css
   Solid-dark header, scroll state, mobile menu.
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--c-bg);
    height: var(--header-h);
    transition: border-color var(--dur) var(--ease);
    border-bottom: 2px solid transparent;
    /* NO backdrop-filter, NO blur — solid dark */
}

.header--scrolled {
    border-bottom: 2px solid var(--c-accent);
}

.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-24);
}

/* Logo */
.header__logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.header__logo img,
.header__logo svg {
    height: 32px;
    width: auto;
}

/* Desktop nav */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--s-32);
}

.header__nav-link {
    color: var(--c-text);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: color var(--dur) var(--ease);
}

.header__nav-link:hover,
.header__nav-link--active {
    color: var(--c-accent);
}

/* Utility nav (desktop only) */
.header__utility {
    display: flex;
    align-items: center;
    gap: var(--s-16);
    margin-left: var(--s-32);
}

.header__utility-link {
    font-size: 0.8125rem;
    color: var(--c-text-dim);
    transition: color var(--dur) var(--ease);
}

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

.header__cta {
    margin-left: var(--s-8);
}

/* Hamburger */
.header__hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1010;
}

.header__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--c-text);
    border-radius: 1px;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.header__hamburger.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__hamburger.is-active span:nth-child(2) {
    opacity: 0;
}

.header__hamburger.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.header__mobile-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--c-bg);
    padding: var(--s-32) var(--s-24);
    z-index: 999;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease);
}

.header__mobile-menu.is-open {
    transform: translateX(0);
}

.header__mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--s-24);
}

.header__mobile-link {
    display: block;
    color: var(--c-text);
    font-size: 1.125rem;
    font-weight: 500;
    padding: var(--s-8) 0;
    border-bottom: 1px solid var(--c-border);
}

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

.header__mobile-cta {
    margin-top: var(--s-32);
    width: 100%;
    text-align: center;
}