/* === Base & Global === */
*, *::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, 192, 130, 0.3);
    color: #f0f4f8;
}

/* === Scroll Reveal (progressive enhancement) === */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(32px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* === Navbar Scroll State === */
.navbar-scrolled {
    background: rgba(7, 19, 33, 0.92) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(94, 192, 130, 0.1);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

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

::-webkit-scrollbar-track {
    background: #071321;
}

::-webkit-scrollbar-thumb {
    background: #1e4066;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #2e5a8e;
}

/* === Focus Styles === */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #5ec082;
    outline-offset: 2px;
    border-radius: 4px;
}

/* === Mobile Menu Animation === */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

#mobile-menu.open {
    max-height: 400px;
}