/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--primary-bg);
    border-bottom: 1px solid var(--border-subtle);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.logo-mark {
    width: 32px;
    height: 32px;
    background: var(--accent-blue);
    border-radius: var(--border-radius);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 20px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}