/* ── Base & Utilities ───────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ── Reveal Animation (progressive enhancement) ─────── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal.animate-in {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Navbar ──────────────────────────────────────────── */
#site-nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-blur: 12px;
    box-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 4px 20px rgba(0,0,0,0.04);
}
#site-nav.scrolled .nav-text,
#site-nav.scrolled .nav-text-alt {
    color: #1e293b;
}
#site-nav.scrolled .nav-icon-stroke {
    stroke: #0d9488;
}
#site-nav.scrolled .nav-icon {
    filter: none;
}

/* ── Mobile Menu ─────────────────────────────────────── */
#mobile-menu.open {
    translate: 0 0;
    opacity: 1;
    pointer-events: all;
}
#mobile-menu {
    transition: opacity 0.3s ease, translate 0.3s ease, pointer-events 0.3s;
}
.mobile-link {
    transition: color 0.2s;
}

/* ── Smooth scroll offset for anchored sections ──────── */
section[id] {
    scroll-margin-top: 80px;
}