/* Research hub (/research/) — loaded after the shared research base
   stylesheet (s-*.css). Content-hashed: edits require re-hashing the
   filename and updating the four hub pages. */

/* ── NAV ──────────────────────────────────────── */

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(11, 22, 35, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 8px 0;
  min-width: 180px;
  z-index: 200;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

/* ── HERO ────────────────────────────────────── */

.hero {
  padding: 124px 0 40px;
  position: relative;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(52px, 7.5vw, 104px);
  font-weight: 400;
  line-height: 1.0;
  color: var(--coral);
}

.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  max-width: 640px;
  margin-top: 28px;
}

/* ── ARTICLE CARDS ───────────────────────────── */

.articles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 48px 0 8px;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 36px 32px;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.article-card:hover {
  border-color: rgba(255,154,131,0.45);
  background: rgba(255,255,255,0.05);
  transform: translateY(-3px);
}

.article-card-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
}

.article-card-title {
  font-family: var(--serif);
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 400;
  line-height: 1.2;
  color: var(--coral);
}

.article-card-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  line-height: 1.75;
  flex-grow: 1;
}

.article-card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--coral);
  letter-spacing: 0.02em;
}

.article-card:hover .article-card-link { color: var(--coral-lt); }

/* ── SERIES NOTE ─────────────────────────────── */

.series-note {
  border-left: 2px solid var(--green);
  padding: 6px 0 6px 24px;
  margin: 56px 0 24px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  max-width: 720px;
}

/* ── ANIMATIONS ──────────────────────────────── */

.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ── FOOTER ──────────────────────────────────── */

footer {
  background: var(--navy-deep);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 32px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}
.footer-wordmark { font-family: var(--serif); font-size: 18px; color: var(--coral); }
.footer-venture { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 6px; font-weight: 500; }
.footer-purpose { font-size: 12px; color: rgba(255,255,255,0.45); margin-bottom: 8px; line-height: 1.6; }
.footer-acnc { font-size: 12px; color: rgba(255,255,255,0.75); margin-top: 4px; }

/* ── RESPONSIVE ──────────────────────────────── */

@media (max-width: 900px) {
  .hero { padding: 104px 0 24px; }
  .articles-grid { grid-template-columns: 1fr; gap: 16px; }
  .article-card { padding: 28px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1 !important; transform: none !important; }
}