/* ── Reset & Base ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    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(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal.visible {
        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; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* ── Custom Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #064e3b;
}
::-webkit-scrollbar-thumb {
    background: #047857;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #059669;
}

/* ── Selection ── */
::selection {
    background: #6ee7b7;
    color: #022c22;
}

/* ── Navbar Scroll State ── */
.navbar-scrolled {
    box-shadow: 0 1px 20px rgba(2, 44, 34, 0.08);
}

/* ── Hover underline animation for links ── */
a {
    text-decoration: none;
}

/* ── Focus visible for accessibility ── */
:focus-visible {
    outline: 2px solid #10b981;
    outline-offset: 2px;
}

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

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

/* ── Form focus states ── */
input:focus,
textarea:focus {
    border-color: #10b981 !important;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

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

/* ── Smooth image loading ── */
img {
    transition: opacity 0.3s ease;
}

img[data-loaded="true"] {
    opacity: 1;
}

img:not([data-loaded]) {
    opacity: 0;
}