/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }
img, svg { display: block; max-width: 100%; }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ── Reveal on scroll (progressive enhancement) ── */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed {
    opacity: 1;
    transform: none;
}
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Mobile menu transitions ── */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
#mobile-menu.open {
    max-height: 400px;
}

/* ── Hamburger animation ── */
#menu-toggle[aria-expanded="true"] #bar1 {
    transform: translateY(6px) rotate(45deg);
}
#menu-toggle[aria-expanded="true"] #bar2 {
    opacity: 0;
}
#menu-toggle[aria-expanded="true"] #bar3 {
    transform: translateY(-6px) rotate(-45deg);
    width: 1.5rem;
}