*, *::before, *::after {
    box-sizing: border-box;
}

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

body {
    min-height: 100vh;
}

/* NAV */
#nav.scrolled {
    background: rgba(10, 20, 50, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

#mobile-menu.open .mobile-link {
    animation: fadeUp 0.3s ease forwards;
}

#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; }
#mobile-menu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

.menu-line:nth-child(3) {
    transform-origin: right;
}

#mobile-menu.open .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

#mobile-menu.open .menu-line:nth-child(2) {
    opacity: 0;
}

#mobile-menu.open .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    width: 24px;
    margin-left: 0;
}

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

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* Why cards */
.why-card {
    position: relative;
}

.why-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.3s ease;
    background: radial-gradient(circle at 50% 0%, rgba(251, 191, 36, 0.08), transparent 70%);
}

.why-card:hover::after {
    opacity: 1;
}

/* Scroll reveal (below fold only) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .service-card, .why-card { transition: none; }
    .service-card:hover { transform: none; }
    .why-card:hover { transform: none; }
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0a1432; }
::-webkit-scrollbar-thumb { background: #1e3a8a; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3b5bdb; }

/* Selection */
::selection {
    background: rgba(251, 191, 36, 0.3);
    color: #fbbf24;
}