.footer {
  border-top: 1px solid var(--color-bg-surface-light);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
  margin-top: auto;
  position: relative;
}

/* Linha de brilho sobre a borda do topo */
.footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-glow-line), transparent);
}

.footer-grid {
  display: grid;
  gap: var(--spacing-xxl);
  margin-bottom: var(--spacing-xl);
}

/* 4 colunas só a partir de 1024px: em 768px elas não cabiam e o e-mail estourava a tela */
@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  }
}

.footer-brand {
  max-width: 380px;
}

/* Variação do .nav-logo (logo.css) para o footer */
.footer-logo {
  font-family: var(--font-family-base);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-ink);
  margin-bottom: var(--spacing-md);
  letter-spacing: 1px;
}

.footer-heading {
  color: var(--color-text-main);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-link,
.footer-text-item {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* O e-mail é longo: pode quebrar em vez de estourar a coluna */
.footer-link {
  overflow-wrap: anywhere;
}

.footer-link:hover {
  color: var(--color-text-main);
}

.footer-text-item {
  cursor: default;
}

.footer-bottom {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-copy {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-back-up {
  color: var(--color-text-main);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-back-up:hover {
  color: var(--color-primary-ink);
  transform: translateY(-2px);
}

.footer-back-icon {
  width: 14px;
  height: 14px;
  stroke: currentColor;
}