.classroom-guide {
  margin-top: 19px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.classroom-guide::before {
  display: block;
  height: 6px;
  background: linear-gradient(90deg, var(--sun), #f5dc7d, #6f9e72);
  content: "";
}

.classroom-guide-inner { padding: 28px; }
.classroom-guide h2 { font-size: clamp(23px, 3vw, 32px); }

.classroom-guide-summary {
  max-width: 880px;
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.classroom-guide-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 16px;
}

.classroom-guide-facts span {
  padding: 8px 11px;
  border: 1px solid #d8e5c7;
  border-radius: 999px;
  background: #edf5df;
  color: var(--leaf);
  font-size: 12px;
}

.classroom-guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.classroom-guide-grid article {
  padding: 18px;
  border: 1px solid #e1ddcf;
  border-radius: 15px;
  background: #fffef9;
}

.classroom-guide-grid article.classroom-guide-example { background: #fff7dd; }

.classroom-guide-grid h3 {
  margin: 0 0 8px;
  color: var(--leaf);
  font-family: 'DM Serif Display', 'Noto Serif SC', serif;
  font-size: 17px;
  font-weight: 400;
}

.classroom-guide-grid p,
.classroom-guide-grid li {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.classroom-guide-grid p { margin: 0; }
.classroom-guide-grid ol,
.classroom-guide-grid ul { margin: 0; padding-left: 19px; }
.classroom-guide-grid li + li { margin-top: 5px; }

@media (max-width: 720px) {
  .classroom-guide-inner { padding: 22px 18px; }
  .classroom-guide-grid { grid-template-columns: 1fr; }
}

@media print {
  .classroom-guide { display: none !important; }
}