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

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scroll Reveal - Progressive Enhancement */
@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    .scroll-reveal:nth-child(2) { transition-delay: 0.08s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.16s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.24s; }
    .scroll-reveal:nth-child(5) { transition-delay: 0.32s; }
    .scroll-reveal:nth-child(6) { transition-delay: 0.40s; }
}

/* Fallback: content always visible if JS is disabled */
.no-js .scroll-reveal,
.js-enabled .scroll-reveal {
    /* JS will add .revealed class */
}

/* Navbar transition */
.navbar-scrolled #navbar {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.06);
}

.navbar-scrolled .nav-logo-text {
    color: #0f172a;
}

/* Mobile menu animation */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Subtle pattern for sections */
.section-pattern {
    background-image: radial-gradient(circle at 1px 1px, rgba(0,0,0,0.03) 1px, transparent 0);
    background-size: 24px 24px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Print styles */
@media print {
    nav, #mobile-menu-btn, .scroll-reveal { display: none; }
    body { color: #000; background: #fff; }
    a { color: #000; }
}