.page-header {
  margin: 2rem auto 1.5rem;
  max-width: 760px;
  text-align: center;
}

.page-header p {
  color: var(--text-soft);
  font-size: 0.95rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.filter-btn {
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.86);
  color: var(--text-soft);
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.7);
  transition: background 0.12s ease, color 0.12s ease, transform 0.12s ease,
    box-shadow 0.12s ease, border-color 0.12s ease;
}

.filter-btn .key {
  font-weight: 600;
  margin-right: 0.25rem;
}

.filter-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(15, 23, 42, 0.9);
}

.filter-btn.active {
  background: var(--accent-strong);
  border-color: transparent;
  color: #f9fafb;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.9);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border-radius: 16px;
  padding: 1rem 0.9rem 1.15rem;
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.9);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(30, 64, 175, 0.45);
  transition: transform 0.12s ease, box-shadow 0.12s ease,
    border-color 0.12s ease, background 0.12s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 1);
  border-color: rgba(129, 140, 248, 0.95);
  background: radial-gradient(circle at top, #111827, #020617);
}

.card-number {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-softer);
  margin-bottom: 0.25rem;
}

.card-question {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0 0 0.6rem;
  color: #e5e7eb;
}

.behind-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-softer);
  margin-bottom: 0.35rem;
}

.card-line {
  font-size: 0.8rem;
  margin: 0.1rem 0;
  color: var(--text-soft);
}

.card-line .role {
  font-weight: 700;
  color: #f9fafb;
}

.category-tag {
  margin-top: 0.7rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #a5b4fc;
}