body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #f9fafb;
  color: #333;
}

.main-content {
  margin-left: 240px;
  padding: 2.5rem 3rem;
  min-height: 100vh;
}

.welcome-section {
  margin-bottom: 3rem;
}

.welcome-section h1 {
  font-size: 2.2rem;
  margin-bottom: 0.6rem;
  color: #1b5e20;
}

.welcome-section p {
  font-size: 1.1rem;
  color: #555;
  margin: 0.4rem 0;
}

#access-info a {
  color: #2e7d32;
  text-decoration: none;
  font-weight: 500;
}

#access-info a:hover {
  text-decoration: underline;
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.8rem;
  margin-top: 2rem;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid #e0e0e0;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.12);
  border-color: #a5d6a7;
}

.card h2 {
  color: #2e7d32;
  margin-bottom: 0.8rem;
}

.card p {
  color: #666;
  font-size: 1.05rem;
}