/* ===== BASE & RESET ===== */
*, *::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;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== SCROLL REVEAL (progressive enhancement) ===== */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    .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; }
}

/* Fallback: always visible if JS disabled or reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ===== NAV SCROLLED STATE ===== */
nav.scrolled {
    background: rgba(15, 36, 25, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.2);
}

nav.scrolled .nav-logo {
    color: #f5f0e3;
}

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

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

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f9f4ea;
}

::-webkit-scrollbar-thumb {
    background: #2d5c3c;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #1a3a2a;
}

/* ===== SELECTION ===== */
::selection {
    background: #2d5c3c;
    color: #f5f0e3;
}

/* ===== MENU ITEM HOVER ===== */
#menu ul li {
    transition: transform 0.2s ease;
}

#menu ul li:hover {
    transform: translateX(4px);
}

/* ===== BUTTON FOCUS ===== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #f5f0e3;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== IMAGE LOADING SHIMMER ===== */
img {
    background: linear-gradient(90deg, #f0f5f1 25%, #e8efe9 50%, #f0f5f1 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

img[src] {
    animation: none;
    background: transparent;
}