/* Base & Utilities */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* Scroll Reveal Animations — progressive enhancement only */
.reveal-up,
.reveal-left,
.reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal-up {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal-left {
        opacity: 0;
        transform: translateX(-40px);
    }
    .reveal-right {
        opacity: 0;
        transform: translateX(40px);
    }
    .reveal-up.revealed,
    .reveal-left.revealed,
    .reveal-right.revealed {
        opacity: 1;
        transform: none;
    }
}

/* Navbar scroll state */
#navbar.scrolled {
    background: rgba(254, 253, 248, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(6, 78, 59, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #16a34a;
    border-radius: 9999px;
    transition: width 0.3s ease;
}

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

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

#mobile-menu:not(.open) {
    opacity: 0;
    pointer-events: none;
}

#mobile-menu.open [aria-hidden="false"] {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

#mobile-menu:not(.open) [aria-hidden="true"] {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Hamburger animation */
#menu-btn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
#menu-btn.active .menu-line:nth-child(2) {
    opacity: 0;
}
#menu-btn.active .menu-line:nth-child(3) {
    width: 24px;
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Subtle pattern overlay for sections */
section::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0.015;
    background-image: radial-gradient(circle at 25% 25%, currentColor 1px, transparent 1px);
    background-size: 32px 32px;
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 3px solid #86efac;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Smooth image loading */
img {
    loading: lazy;
    decoding: async;
}

/* Selection color */
::selection {
    background: #bbf7d0;
    color: #064e3b;
}