body {
  display: flex;
  background-color: #e9e9e9;
}
#sidebar {
  width: 250px;
  background-color: #f4f4f4;
  display: flex;
  flex-direction: column;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
  transition: width 0.3s ease;
  padding: 20px;
  box-sizing: border-box;
}
#sidebar.collapsed {
  width: 80px;
  padding: 20px 10px;
  align-items: center;
}
#sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
  width: 100%;
}
#sidebar-header h2 {
  margin: 0;
  white-space: nowrap;
}
#collapse-btn {
  cursor: pointer;
  font-size: 24px;
  background: none;
  border: none;
}
#sidebar.collapsed #sidebar-header h2,
#sidebar.collapsed #collapse-btn {
  display: none;
}
#home-btn {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  margin-bottom: 30px;
}
#home-btn img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
}
#sidebar.collapsed #home-btn {
  display: block;
}
#menu {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
  width: 100%;
}
#menu li a {
  display: flex;
  align-items: center;
  padding: 15px 10px;
  text-decoration: none;
  color: #333;
  border-radius: 5px;
  margin-bottom: 10px;
  white-space: wrap;
  overflow: hidden;
  transition: background-color 0.2s;
}
#menu li a:hover {
  background-color: #ddd;
}
#menu li a img {
  width: 50px;
  height: 50px;
  margin-right: 15px;
  flex-shrink: 0;
  border-radius: 50%;
}
#sidebar.collapsed #menu li a .link-text {
  display: none;
}
#sidebar.collapsed #menu li a {
  justify-content: center;
}
#sidebar.collapsed #menu li a img {
  margin-right: 0;
}
#sidebar.collapsed #sidebar-header,
#sidebar.collapsed #menu {
  display: none;
}
#main-content {
  flex-grow: 1;
  padding: 0;
}
#content-frame {
  width: 100%;
  height: 100%;
  border: none;
}