/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

/* ── Scroll-reveal base (visible by default, enhanced by JS) ── */
.reveal-down,
.reveal-left,
.reveal-right,
.reveal-up {
    opacity: 1;
    transform: none;
    transition: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-down {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-left {
        opacity: 0;
        transform: translateX(-40px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-right {
        opacity: 0;
        transform: translateX(40px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-up {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .reveal-down.is-visible,
    .reveal-left.is-visible,
    .reveal-right.is-visible,
    .reveal-up.is-visible {
        opacity: 1;
        transform: none;
    }
}

/* ── Header scroll state ────────────────────────────────── */
#site-header {
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}
#site-header.scrolled {
    background: rgba(254, 253, 248, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(6, 78, 59, 0.08);
}

/* ── Mobile menu ────────────────────────────────────────── */
#mobile-menu.open {
    opacity: 1;
    pointer-events: all;
}

/* ── Nav link underline animation ───────────────────────── */
.nav-link {
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: currentColor;
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-link:hover::after {
    width: 100%;
}

/* ── Hero entrance (above fold — no JS dependency) ──────── */
#hero h1,
#hero p,
#hero .reveal-down {
    animation: heroFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}
#hero .reveal-down:nth-child(1) { animation-delay: 0.1s; }
#hero .reveal-down:nth-child(2) { animation-delay: 0.25s; }
#hero .reveal-down:nth-child(3) { animation-delay: 0.4s; }

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Subtle parallax on hero image (progressive enh.) ──── */
@media (prefers-reduced-motion: no-preference) {
    .group img {
        transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
}

/* ── Selection color ─────────────────────────────────────── */
::selection {
    background: rgba(6, 78, 59, 0.2);
    color: inherit;
}