.sidebar {
  width: 300px;  
  background-color: #F4804C;
  padding: 32px; 
  color: white;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  text-align: center;  
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;  
  gap: 12px;
  margin-bottom: 48px;  
  font-size: 32px;  
  font-weight: bold;
  cursor: pointer;
  color: white;
  text-decoration: none;
}

.book-icon {
  font-size: 36px;  
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 16px;  
  align-items: center;  
  width: 100%;
}

.menu-item {
  padding: 16px;  
  border-radius: 12px;  
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 20px;  
  color: white;
  text-decoration: none;
  display: block;
  width: 100%;  
  text-align: center;
}

.menu-item:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateX(5px);
}

.menu-item.selected {
  background-color: #2D1B69;
  color: white;
}

.main-content {
  margin-left: 300px;  
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(2, 1fr); 
  gap: 24px;
  min-height: 100vh;
}

.content-box {
  padding: 32px;
  border-radius: 16px;
  min-height: 300px;  
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  transition: transform 0.2s ease;
}

.content-box:hover {
  transform: scale(1.02);
}

.box-1 { background-color: #4CAF50; }  
.box-2 { background-color: #2196F3; }  
.box-3 { background-color: #f44336; }  
.box-4 { background-color: #E91E63; }  