* {
        margin: 0;
        padding: 0;
      }

      body {
        height: 100%;
        overflow: hidden;

      }

      body {
        font-size: 12pt;
        font-weight: bold;
        line-height: 1.5;
        word-break: keep-all;
        color: black;
        cursor: pointer;
        font-family: sans-serif;
      }

      h1 {
      font-size: 17pt;
      color: black;
      text-decoration: underline;
      }

    img {
        height: 200px;
   /*     align: center;
        display: block;
        margin: 0 auto;*/
      }

    mark {
        background-color: darkred;
        color: darkred;
      }

      a {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        padding: 10px;
/*        background-color: gainsboro;*/
/*        background-color: transparent;*/
        color: black;
        text-decoration: none;
        cursor: pointer;
      }

      a:visited {
        color: black;
      }

      a:not(:first-child) {
        display: none;
      }

      a:target {
        display: block;
        position: absolute;
      }

      p{
        margin-right: 20px;
/*        display: inline;*/
        display: block; /* 또는 flex */
/*        background-color: white;*/
        background-color: transparent;
        z-index: 1;
        position: relative;
      }


    
a#13:target {
  background-image: url('img/id_11.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 5px solid red;
}