* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}
body {
  background-color: #f4f4f9;
  color: #333;
  line-height: 1.6;
}

.header {
  background: #59caf7;
  color: white;
  padding: 20px;
  text-align: center;
}

.navbar {
  background: #333;
  overflow: hidden;
  display: flex;
  justify-content: center;
}
.navbar a {
  color: white;
  padding: 14px 20px;
  text-decoration: none;
  display: block;
}

.navbar a:hover {
  background: #575757;
}

.container {
  display: flex;
  margin: 20px;
}

.sidebar {
  width: 25%;
  background: #e9ecef;
  padding: 15px;
  border-right: 2px solid #ccc;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  padding: 10px;
  margin-bottom: 8px;
  background: #fff;
  border-radius: 5px;
  transition: 0.3s;
  cursor: pointer;
}

.sidebar li:hover {
  background: #d6e4ff;
}

.content {
  flex: 1;
  padding: 20px;
  background: #fff;
  margin-left: 15px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 15px;
  margin-top: 20px;
}