body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
  }

 
 #image-container {
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
  } 
  .container {
    padding-top: 100px;

  }

  .content {
    display: flex;
    flex-wrap: wrap;
    background-color: rgb(70, 97, 117);
    opacity: .7;
    max-width: 75%;
    border: 1px solid darkgray;
    margin: 100px auto;
    padding: 5px;
  }

.box {
   flex: auto;
    min-width: 200px;
    padding: 20px;
    margin: 10px;
    border: 1px solid black;
    text-align: center;
}