header {
    position: sticky;
    top: 0;
    background: rgba(11,15,25,.8);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.navbar {
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

nav a {
    margin-left: 36px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
}

nav a:hover {
    color: #fff;
}

.nav-cta {
    padding: 12px 22px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    box-shadow: var(--glow-soft);
}
@media (max-width: 900px) {
    h1 { font-size: 42px; }

    .service-grid,
    .process-grid,
    .work-grid {
        grid-template-columns: 1fr;
    }

    nav {
        display: none;
    }
}