@media (min-width: 600px){
    body{
        margin: 0 auto;
        padding: 0;
        padding-top: 100px;
        background-color:rgb(255, 240, 175);
        color: gray;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }
    .pc{
        display: block;
      }
      .mobile{
        display: none;
      }
    hr{
        border-top: 1px;
        border-color: rgb(187, 187, 187);
    }
    h2{
        margin: 0 auto;
    }
    h4{
        margin: 0 auto;
    }
    #regist_first_container{
        text-align: center;
        margin: 0 auto;
        width:300px;
    }
    
    table{
        width:300px;
        margin: 0 auto;
    }
    table tr td{
        text-align: center;
    }
    
    input{
        border:none;
        height: 20px;
        padding: 5px;
        border-radius:5px;
    }
    button{
        background-color:rgba(0, 0, 0, 0);
        border: none;
        color: gray;
        font-weight: bold;
    }
}