body {
  background-color: #f0f0f0;
}

.page {
  width: 500px;
  margin: 0 auto;
}

.box1 {
  width: 400px;
  padding: 10px;
  margin: 30px auto;  
  border: 3px solid #333;
  background-color: #d9eaff;
}

.box2 {
  width: 400px;
  padding: 30px;
  margin: 50px auto; 
  border: 4px dashed #660000;
  background-color: #ffe6e6;
}

#box3 {
  width: 400px;
  padding: 5px;
  margin: 50px auto;  
  border: 5px double #006633;
}

.box4 {
  width: 400px;
  padding: 30px;
  margin: 50px auto; 
  border: 4px dashed #660000;
  background-color: #ffe6e6;
  box-sizing: border-box;
}