body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.header {
  background: #2c3e50;
  color: #fff;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.logo {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.2rem;
}

.nav a {
  color: #ecf0f1;
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.95rem;
}

.nav-admin {
  color: #f1c40f !important;
}

.nav-admin.active {
  color: #fff !important;
  text-decoration: underline;
}

main {
  padding: 32px 0;
}

h1 {
  margin-bottom: 24px;
}

.card-section h2 {
  margin-bottom: 20px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: #f9f9f9;
  border: 1px solid #e0e0e0;
  padding: 16px;
  border-radius: 6px;
}

.btn {
  background: #3498db;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
}

.footer {
  background: #2c3e50;
  color: #bdc3c7;
  padding: 20px 0;
  margin-top: 40px;
}

.admin-page ul {
  list-style: none;
  padding: 0;
}

.admin-page li {
  margin-bottom: 8px;
}