/*
 * shared/site.css — site-wide nav, a11y, atmosphere
 * Loaded by: index, about, minecraft, minecraft/resources, utilities, utilities/hdr-switch
 * NOT loaded by: slimebase, slimebase/farm (self-contained)
 *
 * Each page must define these CSS variables in its own :root:
 *   --site-border        (border color for nav and dropdown)
 *   --site-text-muted    (default link/text color)
 *   --site-text          (hover text color)
 *   --site-accent        (active link, focus ring, skip-link bg)
 */

/* ── Fallback values (in case a page forgets to define) ── */
:root {
    --site-border: rgba(255, 255, 255, 0.15);
    --site-text-muted: #b9b9c3;
    --site-text: #ffffff;
    --site-accent: #75f3ee;
}

/* ══════════════════════════════════════
   BODY NOISE OVERLAY
   ══════════════════════════════════════ */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* ══════════════════════════════════════
   SKIP LINK
   ══════════════════════════════════════ */
.skip-link {
    position: absolute;
    top: 8px;
    left: 8px;
    padding: 10px 18px;
    background: var(--site-accent);
    color: #0a0a12;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    z-index: 1000;
    transform: translateY(-200%);
    transition: transform 0.18s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ══════════════════════════════════════
   FOCUS
   ══════════════════════════════════════ */
:focus { outline: none; }
:focus-visible {
    outline: 2px solid var(--site-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ══════════════════════════════════════
   SITE NAV
   ══════════════════════════════════════ */
.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--site-border);
    position: relative;
    z-index: 100;
}

.site-nav a,
.site-nav .nav-trigger {
    color: var(--site-text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s;
}
.site-nav a:hover,
.site-nav .nav-trigger:hover { color: var(--site-text); }
.site-nav a.active,
.site-nav .nav-trigger.active { color: var(--site-accent); }

.nav-group {
    position: relative;
    display: flex;
    align-items: center;
}
.nav-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}
.nav-chevron {
    width: 11px;
    height: 7px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}
.nav-group:hover .nav-chevron,
.nav-group:focus-within .nav-chevron { transform: rotate(180deg); }

.nav-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    background: rgba(15, 15, 25, 0.96);
    backdrop-filter: blur(12px);
    border: 1px solid var(--site-border);
    border-radius: 12px;
    padding: 5px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
    z-index: 50;
}
.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    height: 8px;
}
.nav-group:hover .nav-dropdown,
.nav-group:focus-within .nav-dropdown {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.nav-dropdown a {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}
.nav-dropdown a:hover { background: rgba(255, 255, 255, 0.06); }

@media (max-width: 560px) {
    .site-nav { gap: 22px; padding: 12px 14px; }
    .site-nav a, .site-nav .nav-trigger { font-size: 0.78rem; }
}