body{
    font-family: sans-serif;
   
}

.header{
height: 20px;
padding-left:150px;
}

.title{
    padding-left: 150px;
    padding-right: 150px;  
}

.header-list li{
    list-style:none;
    float: left;
    padding-left: 20px;
    padding-right: 5px;
}

.main{
    padding-left: 200px;
    padding-right: 200px;

}


.gaiyou{
    padding-left: 100px;
    padding-right: 100px;

}


h1 {
    color: #010079;
    text-shadow: 0 0 5px white;
    border-left: solid 7px #010079;
    background: -webkit-repeating-linear-gradient(-45deg, #cce7ff, #cce7ff 3px,#e9f4ff 3px, #e9f4ff 7px);
    background: repeating-linear-gradient(-45deg, #cce7ff, #cce7ff 3px,#e9f4ff 3px, #e9f4ff 7px);
  }

  h2{
    background: #dfefff;
    box-shadow: 0px 0px 0px 5px #dfefff;
    border: dashed 1px #96c2fe;
    padding: 0.2em 0.5em;
    color: #010079;
    width: 150px;
    font-size: 20px;
    text-align: center;
  }

.yakuin{
    text-align:center;
}

  table{
    text-align: center;    
    margin-top: 10px;
    margin-bottom: 20px;
    border-collapse: collapse;
  }

  td{
    width: 90px;
    border:solid 1px #00ff
  }

  .houkoku-item{
    float: left;
    margin-right: 20px;
    text-align: center;
  }

  .houkoku-item p{
    margin-top: 0px;
  }


  .houkoku:after{
    clear:both;
  }
 
.hr1{
  border-top: 3px dotted rgb(0, 191, 255);
  width: 80%; 
  margin-bottom: 20px;/* 点線 */
}


 

  .contents {
    text-align: center;
    padding: 0; /* ←ここポイント！！ */
  }

  .contents-item{

    margin-right: 5px;
  }
 

  .contents-item p{
    margin-top: 0px;
  }

  /* 画像を中央寄せにする */
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  height: auto;
}

/* スマホ対応：画面幅が768px以下ならレイアウトを変える */
@media screen and (max-width: 768px) {
  .main,
  .gaiyou,
  .contents {
    padding-left: 20px;
    padding-right: 20px;
  }

  .houkoku-item,
  .contents-item {
    float: none;
    margin: 10px auto;
    text-align: center;
  }

  .contents-item {
    display: inline-block;
    float: none;
    margin: 10px;
    text-align: center;
  }

  .houkoku,
  .contents {
    text-align: center;
  }

  h2 {
    width: auto;
    font-size: 18px;
  }
}

/* 会場風景の写真も中央揃えにする */
.contents {
  text-align: center;
}

.contents-item {
  display: inline-block;
  float: none;
  margin: 10px;
  text-align: center;
}


@media screen and (max-width: 600px) {
  .contents-item {
    display: block;
    margin: 10px auto; /* 写真を中央寄せ */
  }
}