body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #ece9e6, #ffffff);
}

.container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: #2c3e50;
  color: white;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
}

.sidebar .logo img {
  max-width: 100px;
  margin-bottom: 30px;
}

.sidebar nav ul {
  list-style: none;
  padding: 0;
}

.sidebar nav ul li {
  margin: 15px 0;
}

.sidebar nav ul li a {
  color: white;
  text-decoration: none;
}

.sidebar nav ul li .active,
.sidebar nav ul li a:hover {
  color: #f39c12;
}

.content {
  flex: 1;
  padding: 40px;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.cert-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 15px;
  text-align: center;
}

.cert-card img {
  max-width: 100%;
  border-radius: 6px;
}