/* Base styles & custom properties */
:root {
    --color-emerald-950: #052e16;
    --color-emerald-900: #14532d;
    --color-emerald-800: #166534;
    --color-emerald-700: #15803d;
    --color-emerald-600: #16a34a;
    --color-emerald-400: #4ade80;
    --color-emerald-300: #86efac;
    --color-cream-50: #fefdf8;
    --color-cream-100: #fdf9ef;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

/* Scroll reveal base — content visible by default, JS adds animation */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navbar transition */
#navbar.scrolled {
    background: rgba(5, 46, 22, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-cream-50);
}
::-webkit-scrollbar-thumb {
    background: var(--color-emerald-700);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-emerald-600);
}

/* Selection color */
::selection {
    background: var(--color-emerald-300);
    color: var(--color-emerald-950);
}

/* Mobile menu animation */
#mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Image hover zoom */
img {
    transition: transform 0.5s ease;
}

/* Button focus styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-emerald-400);
    outline-offset: 2px;
    border-radius: 4px;
}

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