/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }

/* ── Mobile menu transition ── */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease;
    opacity: 0;
}
#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

/* ── Navbar scroll state ── */
#navbar.scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 20px rgba(0,0,0,0.08);
}
#navbar.scrolled .text-charcoal-900 { color: #1c1c1f !important; }

/* ── Service card hover ── */
.service-card {
    transition: transform 0.3s ease, background-color 0.3s ease;
}
.service-card:hover {
    transform: translateY(-4px);
}

/* ── Scroll-reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
    .reveal-delay-5 { transition-delay: 0.5s; }
}

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid #f06020;
    outline-offset: 2px;
}