/* Cards grandes para cada assunto */

:root {
  --cards-bg: #0b1220;
  --cards-surface: rgba(255, 255, 255, 0.06);
  --cards-surface-2: rgba(255, 255, 255, 0.1);
  --cards-border: rgba(255, 255, 255, 0.14);
  --cards-text: rgba(255, 255, 255, 0.92);
  --cards-muted: rgba(255, 255, 255, 0.68);
  --cards-accent: #6c79db;
  --cards-shadow: 0 18px 55px rgba(0, 0, 0, 0.45);
}

/* Container (grid de cards) */
.assuntos-grid,
.cards-grid {
  /* Força lista vertical (1 card por linha) */
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px; /* >= 15px */
  align-items: stretch;
  padding: 0;
}

/* Card */
.assunto-card,
.card-assunto {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;

  padding: 22px;
  border-radius: 18px;
  background: linear-gradient(180deg, var(--cards-surface), var(--cards-surface-2));
  border: 1px solid var(--cards-border);
  color: var(--cards-text);
  box-shadow: var(--cards-shadow);
  overflow: hidden;

  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.assunto-card::before,
.card-assunto::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: radial-gradient(900px circle at var(--mx, 20%) var(--my, 20%), rgba(108, 121, 219, 0.35), transparent 45%);
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.assunto-card:hover,
.card-assunto:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 121, 219, 0.55);
}

.assunto-card:hover::before,
.card-assunto:hover::before {
  opacity: 1;
}

/* Título grande */
.assunto-title,
.card-assunto-title {
  font-size: clamp(1.25rem, 1.4vw + 1rem, 2rem);
  line-height: 1.15;
  font-weight: 800;
  margin: 0;
}

/* Descrição */
.assunto-description,
.card-assunto-description {
  margin: 0;
  color: var(--cards-muted);
  font-size: 0.98rem;
  line-height: 1.5;
  flex: 1;
}

/* Tags/Metadados */
.assunto-tags,
.card-assunto-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.assunto-tag,
.card-assunto-tag {
  font-size: 0.78rem;
  letter-spacing: 0.2px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.18);
  color: rgba(255, 255, 255, 0.84);
}

/* Link / CTA opcional */
.assunto-link,
.card-assunto-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;

  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(108, 121, 219, 0.6);
  background: rgba(108, 121, 219, 0.18);
  color: rgba(255, 255, 255, 0.95);

  transition: transform 180ms ease, background 180ms ease;
}

.assunto-link:hover,
.card-assunto-link:hover {
  transform: translateY(-2px);
  background: rgba(108, 121, 219, 0.28);
}

/* Acessibilidade: reduzir animações */
@media (prefers-reduced-motion: reduce) {
  .assunto-card,
  .card-assunto,
  .assunto-card::before {
    transition: none;
  }

  .assunto-card:hover,
  .card-assunto:hover {
    transform: none;
  }
}

/* Helper: quando a página usa fundo escuro */
.cards-page-bg {
  background: var(--cards-bg);
  padding: 28px 18px;
}