.grades{
    min-height: 100vh;
}
.section-title {
  text-align: center;
  font-size: 32px;
  margin-bottom: 40px;
  color: #1d2f6f;
  text-transform: uppercase;
  margin-top: 20px;
}

.grades-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1200px;
  margin: auto;
}

.grade-card {
  background: #ffffff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.grade-card h3 {
  font-size: 24px;
  margin-bottom: 15px;
  color: #1d2f6f;
}

.grade-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: 25px;
}

.grade-card ul li {
  font-size: 16px;
  margin: 8px 0;
}

.grade-card button {
  background: #ff6600;
  color: #fff;
  border: none;
  padding: 12px 25px;
  border-radius: 25px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.grade-card button:hover {
  background: #e05500;
}
/*  Mobile responsiveness */
@media (max-width: 900px) {
  .grades-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .grades-grid {
    grid-template-columns: 1fr;
  }
}