:root {
  --pub-card-radius: 14px;
  --pub-card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
  --pub-card-shadow-hover: 0 4px 8px rgba(0,0,0,0.06), 0 20px 40px rgba(0,0,0,0.12);
  --pub-accent: #0d6efd;
  --pub-text: #1a1a1a;
  --pub-muted: #6b7280;
  --pub-bg-tab: #f1f5f9;
  --pub-bg-tab-active: #ffffff;
}

.pub-hub { max-width: 1200px; margin: 0 auto; padding: 36px 16px 48px; }
.pub-hub__header { text-align: center; margin-bottom: 24px; }
.pub-hub__intro { color: var(--pub-muted); max-width: 640px; margin: 0 auto; }

/* ---------- Tabs (Publications / Reports) ---------- */
.pub-tabs {
  display: flex; justify-content: center;
  gap: 4px; background: var(--pub-bg-tab);
  border-radius: 999px; padding: 4px;
  width: max-content; max-width: 100%;
  margin: 0 auto 24px; box-sizing: border-box;
}
.pub-tab {
  border: none; background: transparent; padding: 10px 24px;
  font-size: 1rem; font-weight: 500; color: var(--pub-muted);
  border-radius: 999px; cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
}
.pub-tab.is-active { background: var(--pub-bg-tab-active); color: var(--pub-text);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08); }
.pub-tab.is-disabled { opacity: 0.55; cursor: not-allowed; }

/* ---------- Category pill filters ---------- */
.pub-filters {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin: 0 0 24px;
}
.pub-filter {
  border: 1px solid #e5e7eb; background: #fff;
  padding: 8px 16px; border-radius: 999px;
  font-size: 0.95rem; color: var(--pub-text); cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease;
}
.pub-filter:hover { border-color: var(--pub-accent); }
.pub-filter.is-active {
  background: var(--pub-accent); color: #fff; border-color: var(--pub-accent);
}

/* ---------- Grid ---------- */
.pub-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.pub-grid__item.is-hidden { display: none; }

/* ---------- Card ---------- */
.pub-card {
  background: #fff; border-radius: var(--pub-card-radius);
  overflow: hidden; box-shadow: var(--pub-card-shadow);
  display: flex; flex-direction: column; height: 100%;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.pub-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--pub-card-shadow-hover);
}
.pub-cover {
  display: block; width: 100%; aspect-ratio: 3 / 4;
  background: #f8fafc; overflow: hidden; text-decoration: none;
}
.pub-cover__img {
  width: 100%; height: 100%; object-fit: contain;
}
.pub-meta { padding: 12px 16px 16px; text-align: center; }
.pub-title {
  display: block; color: var(--pub-text); font-weight: 600;
  text-decoration: none; line-height: 1.35; word-break: break-word;
}
.pub-title:hover { color: var(--pub-accent); }
.pub-title--no-link { color: var(--pub-muted); cursor: default; }
.pub-empty { grid-column: 1 / -1; text-align: center; color: var(--pub-muted); padding: 48px 0; }

/* ---------- RTL helpers ---------- */
.pub-hub[dir="rtl"] .pub-tabs,
.pub-hub[dir="rtl"] .pub-filters { direction: rtl; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .pub-card { transition: none; }
  .pub-card:hover { transform: none; }
}

/* ---------- Mobile ---------- */
@media (max-width: 480px) {
  .pub-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
  .pub-meta { padding: 8px 12px 12px; }
}

/* ---------- Tab panel visibility ---------- */
.pub-tab-panel { display: none; }
.pub-tab-panel.is-active { display: block; }
.pub-tab[aria-selected="true"] { background: var(--pub-bg-tab-active); color: var(--pub-text);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08); }
.pub-tab { cursor: pointer; }