h1 {text-align: center;}
.aaa {margintop: 2em;
    color:coral;
    font-size: 350%;}

.bbb {font-size: 85%;}

.ccc {text-align: center;
    font-size: 600%;
    margin-top: 0px;
    margin-bottom: 0px;}

li {display: flex; justify-content: center;}

.ddd {text-align: center;}

address {text-align: center;}

.back {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #ffe9a7;
    opacity: 0.4;
    z-index: -1;
  }
  .back2 {
    background: repeating-linear-gradient( -45deg, #ffc107, #ffc107 10px, #ffe9a7 10px, #ffe9a7 50px );
  }