*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(20, 184, 166, 0.3);
    color: #f0fdfa;
}

/* Fade-in animation for hero elements */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Scroll reveal — only for below-fold sections, progressive enhancement */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

/* Fallback: always show content if JS is disabled */
@media not all and (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* Navbar transition */
#navbar.scrolled {
    background: rgba(8, 14, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

#navbar.scrolled .text-white\/90 {
    color: rgba(255, 255, 255, 0.95);
}

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

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

/* Subtle hover lift for cards */
.group:hover {
    transform: translateY(-2px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.group {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #080e1a;
}

::-webkit-scrollbar-thumb {
    background: rgba(20, 184, 166, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(20, 184, 166, 0.5);
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 1px solid rgba(20, 184, 166, 0.5);
    outline-offset: 4px;
    border-radius: 2px;
}

/* Link underline on hover */
a {
    text-decoration: none;
}

/* Prevent layout shift on images */
img {
    max-width: 100%;
    height: auto;
}