*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body { margin: 0; }

::selection { background: #A7F3D0; color: #064E3B; }

.stat-card { animation: float 4s ease-in-out infinite; }
.stat-card:nth-child(2) { animation-delay: -2s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

#site-header.scrolled {
    --tw-bg-opacity: 1;
    background-color: rgb(254 251 245 / var(--tw-bg-opacity));
    box-shadow: 0 1px 12px rgba(5, 150, 105, 0.08);
}

#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#mobile-menu.open {
    display: flex;
}

/* Subtle grain texture overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    z-index: 9999;
}