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

body {
    /* Smooth font rendering */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animation Keyframes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 20px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

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

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

/* Scroll Reveal Utility Classes */
.reveal-on-scroll {
    opacity: 1; /* Visible by default for progressive enhancement */
    transform: translateY(0);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-on-scroll.is-hidden {
    opacity: 0;
    transform: translateY(30px);
}

/* Navbar Scroll State */
.nav-scrolled #nav-bg {
    opacity: 1;
}

/* Mobile Menu Transitions */
#mobile-menu {
    transition: max-height 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

#mobile-menu.hidden {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
}

#mobile-menu:not(.hidden) {
    max-height: 300px;
    opacity: 1;
}

/* Focus styles for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #FF6B6B;
    outline-offset: 2px;
}