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

/* ── Navbar ─────────────────────────────────────── */
#nav {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
#nav.scrolled {
    background: rgba(254, 253, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(6, 95, 70, 0.08);
}
.nav-brand-text {
    transition: color 0.3s ease;
}
#nav.scrolled .nav-brand-text {
    color: #064e3b;
}
.nav-link {
    color: rgba(254, 253, 248, 0.85);
}
#nav.scrolled .nav-link {
    color: #374151;
}
#nav.scrolled .nav-link:hover {
    color: #059669;
}

/* ── Mobile menu ────────────────────────────────── */
.menu-line {
    display: block;
}
#mobile-menu.open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
#mobile-menu.open .menu-line:nth-child(2) {
    opacity: 0;
}
#mobile-menu.open .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 5px;
}

/* ── Reveal animations (progressive enhancement) ─ */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Scrollbar ──────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #f0fdf4; }
::-webkit-scrollbar-thumb { background: #065f46; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #047857; }

/* ── Selection ──────────────────────────────────── */
::selection {
    background: #065f46;
    color: #fefdf8;
}