/* ── Base & Utilities ── */
html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: rgba(16, 185, 129, 0.2);
    color: #064E3B;
}

/* ── Nav Links ── */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #10B981, #34D399);
    border-radius: 1px;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* ── Header States ── */
#site-header.scrolled {
    background: rgba(253, 248, 240, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(6, 78, 59, 0.06);
}

#site-header.scrolled .menu-line {
    background: #065F46;
}

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

#mobile-menu.open .mobile-link {
    animation: fadeDown 0.4s ease forwards;
    opacity: 0;
}

#mobile-menu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Hamburger Animation ── */
.menu-btn.active .menu-line:first-child {
    transform: rotate(45deg) translate(4px, 4px);
}

.menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-btn.active .menu-line:last-child {
    width: 20px;
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Scroll Reveal ── */
.reveal-up {
    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-up.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.94);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* ── Service Cards ── */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(6, 95, 70, 0.03) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    border-radius: inherit;
}

.service-card:hover::before {
    opacity: 1;
}

/* ── Focus Styles ── */
input:focus,
textarea:focus,
button:focus {
    outline: none;
}

/* ── Subtle Gradient Dividers ── */
.gradient-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(16, 185, 129, 0.2), transparent);
}

/* ── Mobile Responsive ── */
@media (max-width: 640px) {
    .font-serif {
        line-height: 1.15;
    }

    .service-card {
        padding: 1.75rem;
    }

    #contact-form {
        padding: 1.5rem;
    }
}

@media (max-width: 767px) {
    .mobile-link {
        font-size: 1.75rem;
    }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal-up,
    .reveal-scale {
        opacity: 1;
        transform: none;
    }
}