/* ═══════════════════════════════════════════════════════
   Inglês sem Fronteiras — Estilos das lições
   Adicionar via tema filho ou plugin de setup
   ═══════════════════════════════════════════════════════ */

.isf-lesson {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: #1a2332;
  max-width: 820px;
}

/* Objetivo da lição */
.isf-objetivo {
  background: #eef4ff;
  border-left: 4px solid #1a5fa8;
  padding: 1rem 1.25rem;
  border-radius: 0 6px 6px 0;
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

/* Headings */
.isf-lesson h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1a2332;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #e5e0d8;
}

.isf-lesson h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: #1a2332;
  margin: 1.5rem 0 0.5rem;
}

/* Tabelas */
.isf-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.9rem;
  overflow-x: auto;
  display: block;
}

.isf-table thead {
  background: #1a5fa8;
  color: #fff;
}

.isf-table thead th {
  padding: 0.6rem 0.9rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.isf-table tbody tr:nth-child(even) {
  background: #f7f5f1;
}

.isf-table tbody td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid #e5e0d8;
  vertical-align: top;
}

.isf-table tbody tr:hover {
  background: #eef4ff;
}

/* Dica / atenção */
.isf-dica {
  background: #fffbeb;
  border-left: 4px solid #f59e0b;
  padding: 0.9rem 1.1rem;
  border-radius: 0 6px 6px 0;
  margin: 1.25rem 0;
  font-size: 0.9rem;
  line-height: 1.6;
}

.isf-dica ul {
  margin: 0.5rem 0 0 1.2rem;
  padding: 0;
}

.isf-dica li {
  margin-bottom: 0.3rem;
}

/* Fórmula / estrutura gramatical */
.isf-formula {
  background: #f0fdf4;
  border: 1px dashed #16a34a;
  border-radius: 6px;
  padding: 0.8rem 1.1rem;
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  color: #14532d;
  margin: 1rem 0 1.5rem;
}

/* Responsivo */
@media (max-width: 600px) {
  .isf-lesson {
    font-size: 0.95rem;
  }
  .isf-table thead th,
  .isf-table tbody td {
    padding: 0.5rem 0.6rem;
  }
}