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

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

body {
    font-family: 'Inter', sans-serif;
}

/* Marquee animation */
@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.animate-marquee {
    animation: marquee 25s linear infinite;
}

/* Scroll reveal animations — progressive enhancement, only apply when JS runs */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
    
    .reveal[data-delay="1"] { transition-delay: 0.1s; }
    .reveal[data-delay="2"] { transition-delay: 0.2s; }
    .reveal[data-delay="3"] { transition-delay: 0.3s; }
    .reveal[data-delay="4"] { transition-delay: 0.4s; }
}

/* Nav active state */
.nav-link.active {
    color: #34d4a8;
    background: rgba(52, 212, 168, 0.1);
}

/* Navbar scrolled state */
.nav-scrolled {
    background: rgba(4, 14, 30, 0.92) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Smooth scroll offset for fixed nav */
section[id] {
    scroll-margin-top: 80px;
}

/* Selection color */
::selection {
    background: rgba(52, 212, 168, 0.3);
    color: #fff;
}

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

::-webkit-scrollbar-track {
    background: #040e1e;
}

::-webkit-scrollbar-thumb {
    background: #1e3a8a;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2e50a8;
}

/* Mobile menu transitions */
#mobileMenu {
    animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Input focus styles */
input:focus, select:focus, textarea:focus {
    outline: none;
}

/* Image loading placeholder */
img {
    background: linear-gradient(135deg, #0a1f3f 0%, #1e3a8a 100%);
}

/* Subtle hover lift for cards */
.group:hover .group-hover\:-translate-y-1 {
    transform: translateY(-0.25rem);
}