/* Base & Utilities */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

/* Scroll Reveal - Progressive Enhancement */
.scroll-reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    
    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.2s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.3s; }
}

/* Navbar scroll state */
.nav-scrolled {
    background: rgba(2, 44, 34, 0.95) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* Mobile menu transitions */
.mobile-link {
    position: relative;
}

.mobile-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #fbbf24;
    transition: width 0.3s ease;
}

.mobile-link:hover::after {
    width: 100%;
}

/* Hamburger animation */
#mobile-toggle.active .nav-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

#mobile-toggle.active .nav-line:nth-child(2) {
    opacity: 0;
}

#mobile-toggle.active .nav-line:nth-child(3) {
    width: 1.25rem;
    transform: rotate(-45deg) translate(5px, -5px);
}

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

::-webkit-scrollbar-track {
    background: #022c22;
}

::-webkit-scrollbar-thumb {
    background: #064e3b;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #047857;
}

/* Selection color */
::selection {
    background: rgba(251, 191, 36, 0.3);
    color: #022c22;
}

/* Image loading placeholder */
img {
    background-color: #d1fae5;
}