body {
  font-family: sans-serif;
  margin: 0;
  background-color: #f5f5f5;
}

nav {
  background-color: #179ed3;
  color: white;
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav h1 {
  margin: 0;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 30px;
}


.recent {
  padding: 4rem 2rem;
  background: #f6f8ff;
}

.recent h2 {
  color: #333;
  margin-bottom: 1rem;
}

.subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.subject-card {
  background: #ffffff;
  padding: 1rem 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  font-weight: bold;
  color: #6c63ff;
  cursor: pointer;
  transition: 0.3s ease;
}

.hidden {
  display: none !important
}

#toggleSubjects {
  background: #ffffff;
  padding: 1rem 2rem;
  border-radius: 12px;
  color: #6c63ff;
  font-size: 1rem;
  cursor: pointer;
  font-weight: bold;
}

.subject-card:hover {
  background: #6c63ff;
  color: white;
}

.list-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.list-card {
  background: #fff;
  padding: 1rem 1.5rem;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.05);
  transition: transform 0.2s ease;
  cursor: pointer;
}

.list-card:hover {
  transform: translateY(-2px);
  background: #eef0ff;
}