/* ── Base & Utilities ── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

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

/* ── Navbar scroll state ── */
#site-header {
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease, padding 0.3s ease;
}
#site-header.scrolled {
    background: rgba(255, 251, 240, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px rgba(6, 78, 59, 0.08);
}
#site-header.scrolled .nav-link {
    color: #065F46;
}
#site-header.scrolled .nav-link:hover {
    color: #047857;
}

/* ── Floating animation for stat cards ── */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}
@keyframes float-delayed {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
}
.animate-float {
    animation: float 3.5s ease-in-out infinite;
}
.animate-float-delayed {
    animation: float-delayed 3.5s ease-in-out infinite;
    animation-delay: 1.75s;
}

/* ── Mobile menu transitions ── */
#mobile-menu {
    animation: slideDown 0.3s ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Hamburger animation ── */
#mobile-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
#mobile-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
#mobile-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Custom scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #FFFBF0; }
::-webkit-scrollbar-thumb { background: #059669; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #047857; }

/* ── Selection color ── */
::selection { background: #059669; color: #FFFBF0; }

/* ── Focus visible ── */
:focus-visible {
    outline: 2px solid #059669;
    outline-offset: 2px;
}

/* ── Smooth image loading ── */
img {
    background-color: #D1FAE5;
}