/* ── Base & Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; -webkit-font-smoothing: antialiased; }

/* ── Hero Animations (above-the-fold — always visible) ── */
.hero-anim {
    animation: heroIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.hero-anim:nth-child(2) { animation-delay: 0.12s; }
.hero-anim:nth-child(3) { animation-delay: 0.24s; }
.hero-anim:nth-child(4) { animation-delay: 0.36s; }
.hero-anim:nth-child(5) { animation-delay: 0.48s; }

@keyframes heroIn {
    from { opacity: 0; transform: translateY(32px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Scroll Reveal (below-the-fold progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(28px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
}

/* ── Mobile Menu ──────────────────────────────────────── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}
#mobile-menu .mobile-link {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.35s ease, transform 0.35s ease, color 0.3s ease;
}
#mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}
#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.10s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.20s; }

.menu-line { transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
body.menu-open .menu-line:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
body.menu-open .menu-line:nth-child(2) { opacity: 0; }
body.menu-open .menu-line:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); width: 6px; }