/* ── Base & Reset ── */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: rgba(13, 148, 136, 0.2);
    color: #134e4a;
}

/* ── Navigation ── */
.nav-color {
    color: #0f172a;
}

.nav-sub-color {
    color: #64748b;
}

.nav-link {
    color: #475569;
}

/* Scrolled state */
.nav-scrolled .nav-color {
    color: #0f172a;
}

.nav-scrolled .nav-sub-color {
    color: #64748b;
}

.nav-scrolled .nav-link {
    color: #475569;
}

.nav-scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

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

.menu-open .menu-line-1 {
    transform: rotate(45deg) translate(3px, 3px);
}

.menu-open .menu-line-2 {
    opacity: 0;
}

.menu-open .menu-line-3 {
    transform: rotate(-45deg) translate(3px, -3px);
    width: 24px;
}

.mobile-menu-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.menu-open .mobile-menu-link {
    opacity: 1;
    transform: translateY(0);
}

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

/* ── Service Cards ── */
.service-card {
    transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.service-card:hover {
    transform: translateY(-4px);
}

/* ── Scroll Animations ── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── Form Styles ── */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f8fafc;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ── Utility ── */
@media (max-width: 767px) {
    .font-serif {
        line-height: 1.1;
    }
}