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

/* === NAV SCROLLED STATE === */
nav.scrolled {
    background: rgba(2, 6, 23, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

/* === MOBILE MENU === */
.mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: 1.125rem;
    transition: padding-left 0.2s;
}
.mobile-link:hover { padding-left: 0.5rem; color: #5eead4; }

/* === SERVICE CARDS === */
.service-card {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.4s ease;
}
.service-card.revealed {
    opacity: 1;
    transform: translateY(0);
}
.service-card:not(.revealed) {
    opacity: 0;
    transform: translateY(24px);
}

/* === GALLERY === */
.gallery-item {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.gallery-item.revealed {
    opacity: 1;
    transform: scale(1);
}
.gallery-item:not(.revealed) {
    opacity: 0;
    transform: scale(0.95);
}

/* === PROGRESSIVE ENHANCEMENT: animated states only when motion allowed === */
@media (prefers-reduced-motion: no-preference) {
    .service-card:not(.revealed) {
        opacity: 0;
        transform: translateY(24px);
    }
    .gallery-item:not(.revealed) {
        opacity: 0;
        transform: scale(0.95);
    }
}

/* === CUSTOM SCROLLBAR === */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #0f766e; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #14b8a6; }

/* === SELECTION === */
::selection { background: rgba(20, 184, 166, 0.3); color: #0f172a; }