/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--layout-px-mobile);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

@media (min-width: 768px) {
    .header { height: 70px; padding: 0 var(--layout-px-desktop); }
}

.header-transparent {
    background-color: transparent;
    color: var(--color-white);
    mix-blend-mode: difference;
}

.header-solid {
    background-color: var(--color-white);
    color: var(--color-zinc-900);
}

.header-brand {
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 1.125rem;
    letter-spacing: -0.05em;
    text-transform: uppercase;
    color: var(--color-zinc-900);
    text-decoration: none;
}

.header-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    margin: 0;
    padding: 0;
}

.header-nav a {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 300;
    text-decoration: none;
    color: inherit;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.header-nav a:hover { opacity: 1; }

@media (max-width: 768px) {
    .header-nav { display: none; }
}

.header-logo {
    height: 36px;
    max-height: 36px;
    width: auto;
    object-fit: contain;
    display: block;
}

@media (min-width: 768px) {
    .header-logo { height: 44px; max-height: 44px; }
}