/* ─── BASE ─── */
*, *::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;
}

::selection {
    background: #d4a843;
    color: #0a1e3f;
}

/* ─── NAVBAR ─── */
#navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(10, 30, 63, 0.08);
}

#navbar.scrolled .nav-logo-text {
    color: #0a1e3f;
}

#navbar.scrolled .nav-link {
    color: #1e3a70;
}

#navbar.scrolled .nav-link:hover {
    color: #d4a843;
}

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

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

.mobile-link {
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(30, 74, 143, 0.08);
}

.mobile-link:last-child {
    border-bottom: none;
}

/* ─── REVEAL ANIMATIONS (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
}

/* Ensure reveal content is visible by default (no-JS fallback) */
.reveal {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal:not(.revealed) {
        opacity: 0;
        transform: translateY(30px);
    }
}

/* ─── BUTTON HOVER EFFECTS ─── */
a {
    text-decoration: none;
}

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

::-webkit-scrollbar-track {
    background: #f5f5f0;
}

::-webkit-scrollbar-thumb {
    background: #d4a843;
    border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #b8892e;
}

/* ─── IMAGE LAZY LOADING PLACEHOLDER ─── */
img {
    background-color: #e8e4dd;
}

/* ─── ACCESSIBILITY ─── */
:focus-visible {
    outline: 2px solid #d4a843;
    outline-offset: 2px;
    border-radius: 4px;
}

/* ─── UTILITY ─── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}