/* Base Styles & Utilities */
html {
    scroll-behavior: smooth;
}

body {
    /* Prevent layout shift */
    min-height: 100vh;
}

/* Typography refinements */
h1, h2, h3 {
    font-weight: 300;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #F8FAFC;
}
::-webkit-scrollbar-thumb {
    background: #0F172A;
}
::-webkit-scrollbar-thumb:hover {
    background: #2DD4BF;
}

/* Animation Keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 40px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0; /* Start hidden */
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }

/* Scroll Reveal Classes (Progressive Enhancement) */
/* Default state: visible (for no-JS) */
.reveal-up, .reveal-left, .reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* Enhanced state: hidden (applied via JS if enabled, or via media query) */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up { transform: translateY(30px); opacity: 0; }
    .reveal-left { transform: translateX(-30px); opacity: 0; }
    .reveal-right { transform: translateX(30px); opacity: 0; }
    
    .reveal-up.revealed, .reveal-left.revealed, .reveal-right.revealed {
        opacity: 1;
        transform: translate(0, 0);
    }
}

/* Mobile Menu Transition */
#mobile-menu {
    backdrop-filter: blur(10px);
}