*{
    font-family: "ＭＳ Ｐゴシック";
    }

body{
    background-image: url(https://i.imgur.com/BeIaRza.jpg);
     background-size: contain;
     color: white;
     text-align: center;

    }

h1, h2, h3 {
    max-width: fit-content !important;    
    background-color: navy;
    border-style: double;
    border-width: 4px;
    padding: 8px;
    line-height: 27.5px;
    margin: 24px auto;
    }

    p {
        max-width: 750px !important;    
        background-color: navy;
        border-style: double;
        border-width: 4px;
        padding: 8px;
        line-height: 27.5px;
        margin: 24px auto;
        }

    #back{
        position: fixed;
        left: 15px;
        bottom: 15px;
        
        }