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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* NAV */
.nav-fixed {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    transition: box-shadow 0.3s ease, background 0.3s ease;
}

.nav-fixed.scrolled {
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #10b981;
    border-radius: 1px;
    transition: width 0.25s ease;
}

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

/* MOBILE MENU */
#mobile-menu {
    animation: slideDown 0.25s ease;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* HERO */
.hero {
    position: relative;
}

.hero-bg {
    position: absolute;
    inset: 0;
}

.hero-img {
    will-change: transform;
    transition: transform 0.6s ease;
}

.hero:hover .hero-img {
    transform: scale(1.02);
}

.hero-content {
    position: relative;
    z-index: 10;
}

/* SERVICE CARDS */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

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

/* REVEAL ANIMATIONS */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }

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

    .reveal:nth-child(2) { transition-delay: 0.08s; }
    .reveal:nth-child(3) { transition-delay: 0.16s; }
    .reveal:nth-child(4) { transition-delay: 0.24s; }
    .reveal:nth-child(5) { transition-delay: 0.32s; }
    .reveal:nth-child(6) { transition-delay: 0.40s; }
}

/* SCROLL INDICATOR */
.hero-scroll-indicator {
    animation: fadeInUp 1s ease 1.5s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translate(-50%, 12px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* BUTTON HOVER GLOW */
a:hover {
    transition: all 0.2s ease;
}

/* SELECTION */
::selection {
    background: #34d399;
    color: #0f172a;
}

/* SCROLLBAR */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f0f4ff;
}

::-webkit-scrollbar-thumb {
    background: #91a7ff;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4c6ef5;
}

/* MOBILE MENU ANIMATION */
.mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

.mobile-link:last-child {
    border-bottom: none;
}

/* FOCUS VISIBLE */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #34d399;
    outline-offset: 2px;
    border-radius: 4px;
}