body {
  margin: 0;
  font-family: Arial, sans-serif;
  display: flex;
}
.sidebar {
  width: 240px;
  background: #2c3e50;
  color: white;
  height: 100vh;
  padding: 20px;
  box-sizing: border-box;
}
.sidebar h2 {
  text-align: center;
  color: #00ffff;
}
.sidebar a {
  display: block;
  color: white;
  padding: 12px 0;
  text-decoration: none;
  cursor: pointer;
}
.sidebar a:hover {
  background-color: #34495e;
}
.content {
  flex: 1;
  padding: 20px;
  background: #f5f5f5;
}
.page {
  display: none;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}
th, td {
  padding: 10px;
  border: 1px solid #ddd;
  text-align: left;
}
th {
  background: #2c3e50;
  color: white;
}
.lang-switch {
  position: fixed;
  top: 10px;
  right: 20px;
  z-index: 1000;
}
.lang-switch button {
  margin-left: 5px;
}