/* ── Reset & Base ───────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { min-height: 100vh; }
img { max-width: 100%; height: auto; display: block; }

/* ── Navbar ──────────────────────────────────────── */
.nav {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}
.nav.scrolled {
    background: rgba(253, 251, 247, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}
.nav-link { position: relative; }
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #d94428;
    border-radius: 1px;
    transition: width 0.3s ease;
}
.nav-link:hover::after { width: 100%; }
.nav.scrolled .nav-link { color: #57534e; }
.nav.scrolled .nav-link:hover { color: #d94428; }

/* ── Hero ────────────────────────────────────────── */
.hero-bg { position: relative; }
.hero-overlay {
    background: linear-gradient(
        135deg,
        rgba(127, 33, 26, 0.82) 0%,
        rgba(159, 39, 26, 0.72) 40%,
        rgba(217, 68, 40, 0.55) 100%
    );
}
.hero-content { opacity: 1; transform: none; }

/* ── Scroll Reveal ───────────────────────────────── */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.revealed {
    opacity: 1;
    transform: none;
}

/* Progressive enhancement: only animate if JS runs and user prefers motion */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Service Cards ───────────────────────────────── */
.service-card {
    opacity: 1;
    transform: none;
}
@media (prefers-reduced-motion: no-preference) {
    .service-card {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .service-card.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Mobile Menu ─────────────────────────────────── */
#mobileMenu {
    transition: opacity 0.3s ease, transform 0.3s ease, pointer-events 0.3s ease;
}
#mobileMenu.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* ── Back to Top ─────────────────────────────────── */
.back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.back-to-top:hover {
    box-shadow: 0 4px 20px rgba(217, 68, 40, 0.4);
}

/* ── Utility ─────────────────────────────────────── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}