* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body, html {
  height: 100%;
  font-family: Arial, sans-serif;
}

header {
  position: relative;
  background-color: #333;
  color: white;
  padding: 1em 0;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 1.5em;
}


header button {
  position: absolute;
  left: 1em;
  top: 50%;
  transform: translateY(-50%);
  background: #555;
  color: white;
  border: none;
  padding: 0.5em 1em;
  cursor: pointer;
}

.container {
  display: flex;
  height: calc(100% - 70px); /* Adjust for header height */
}

.menu {
  width: 200px;
  background-color: #f4f4f4;
  transition: width 0.3s ease;
  overflow: hidden;
}

.menu.collapsed {
  width: 0;
}

.menu ul {
  list-style: none;
  padding: 1em;
}

.menu li {
  margin: 1em 0;
}

.menu a {
  text-decoration: none;
  color: #333;
}

.content {
  flex: 1;
  background: #fff;
  padding: 1em;
}

iframe {
  width: 100%;
  height: 100%;
  border: none;
  overflow: auto;
}