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

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

body {
    margin: 0;
    overflow-x: hidden;
}

::selection {
    background: rgba(94, 234, 212, 0.2);
    color: #f0f3fa;
}

/* Hero orbs */
.hero-orb {
    background: radial-gradient(circle, rgba(94, 234, 212, 0.4) 0%, transparent 70%);
    animation: orbFloat 8s ease-in-out infinite;
}

.hero-orb-1 {
    animation-delay: 0s;
    background: radial-gradient(circle, rgba(94, 234, 212, 0.3) 0%, transparent 70%);
}

.hero-orb-2 {
    animation-delay: -3s;
    background: radial-gradient(circle, rgba(10, 22, 40, 0.6) 0%, transparent 70%);
}

.hero-orb-3 {
    animation-delay: -5s;
    background: radial-gradient(circle, rgba(94, 234, 212, 0.15) 0%, transparent 70%);
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -30px) scale(1.05); }
    66% { transform: translate(-15px, 20px) scale(0.95); }
}

/* Hero reveal 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:nth-child(1) { transition-delay: 0.1s; }
.reveal:nth-child(2) { transition-delay: 0.2s; }
.reveal:nth-child(3) { transition-delay: 0.3s; }
.reveal:nth-child(4) { transition-delay: 0.4s; }
.reveal:nth-child(5) { transition-delay: 0.5s; }

/* Scroll-triggered reveals */
.reveal-hidden {
    opacity: 0;
    transform: translateY(30px);
}

.reveal-hidden.revealed {
    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);
}

/* Navbar scroll state */
nav.scrolled {
    background: rgba(7, 15, 28, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

nav.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.8);
}

/* Mobile menu */
.mobile-link {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

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

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

#mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
#mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
#mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
#mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }
#mobile-menu.open .mobile-link:nth-child(5) { transition-delay: 0.25s; }

/* Menu item hover line animation */
.group::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(94, 234, 212, 0.4), transparent);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    margin-top: 4px;
}

.group:hover::after {
    width: 60px;
}

/* Image hover */
div > img {
    display: block;
}

/* Focus styles */
a:focus-visible, button:focus-visible {
    outline: 2px solid rgba(94, 234, 212, 0.6);
    outline-offset: 2px;
    border-radius: 4px;
}

/* 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-hidden {
        opacity: 1;
        transform: none;
    }
}

/* Smooth image loading */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #070f1c;
}
::-webkit-scrollbar-thumb {
    background: rgba(94, 234, 212, 0.2);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(94, 234, 212, 0.4);
}