.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.5rem;
    border-bottom: 1px solid var(--header-border, rgba(255,255,255,0.08));
    position: sticky;
    top: 0;
    background: var(--header-bg, rgba(10,10,20,0.92));
    backdrop-filter: blur(8px);
    z-index: 100;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
}

.header-logo img {
    height: 28px;
    width: auto;
}

.header-nav a {
    color: var(--header-nav-color, #8888a0);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: color 0.2s;
    text-transform: uppercase;
}

.header-nav a:hover {
    color: #fff;
}