body {
  background-color: #f7f8fa;
}

.navbar-brand {
  letter-spacing: -0.02em;
}

.hero {
  background: linear-gradient(135deg, #1a2a52 0%, #2c4a8c 100%);
  color: #fff;
  border-radius: 1rem;
  padding: 3.5rem 2rem;
}

.hero .lead {
  color: #d7e0f5;
}

.course-card {
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  height: 100%;
}

.course-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.course-card .card-img-top {
  height: 160px;
  object-fit: cover;
  background-color: #e9ecef;
}

.level-pill {
  font-weight: 600;
}

.test-option {
  cursor: pointer;
}

.stat-box {
  border-radius: 0.75rem;
  padding: 1.25rem;
  background: #fff;
  border: 1px solid #e9ecef;
}