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

/* ── Nav transition ───────────────────────────────── */
#nav.scrolled {
    background: rgba(250, 251, 248, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(27, 67, 50, 0.06);
}

/* ── Scroll reveal (progressive enhancement) ──────── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .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; }
}

/* ── Service card hover ───────────────────────────── */
.service-card {
    transition: background-color 0.5s ease;
}

/* ── Selection ────────────────────────────────────── */
::selection {
    background: rgba(45, 106, 79, 0.15);
    color: #1B4332;
}

/* ── Focus visible ────────────────────────────────── */
:focus-visible {
    outline: 2px solid #2D6A4F;
    outline-offset: 2px;
}

/* ── Subtle input focus ring on form ──────────────── */
input:focus, textarea:focus {
    border-color: #95D5B2 !important;
    box-shadow: 0 0 0 3px rgba(149, 213, 178, 0.25) !important;
}

/* ── Smooth image loading ─────────────────────────── */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}