html,

    body {
        font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
        font-size: 14px;
        color: #000;
        margin: 0;
        padding: 0;
    }

    .logo{
        text-align: center;
        margin-top: 1vh;
        
    }   

    .logo img{
        width: 27vw;
        padding-bottom: 1vh;
    }

    @media screen and (max-width:768px) {
        .logo img{
            width: 40vw;
        }
    }

    .navbar-nav{
        margin: 0 0 0 auto;
    }

    .nav-link{
        margin: 0 0 0 auto;
    }

    .block_1{
        margin-top: 5%;
        display: flex;
        width: 90%;
        margin-left: auto;
        margin-right: auto;
    }

    @media screen and (max-width:767px) {
        .block_1{
            display: block;
            width: 80%;
            margin-left: auto;
            margin-right: auto;
        }
    }

    .block_2{
        margin-top: 5%;
        display: flex;
        width: 90%;
        margin-left: auto;
        margin-right: auto;
    }

    @media screen and (max-width:767px) {
        .block_2{
            display: block;
            width: 80%;
            margin-left: auto;
            margin-right: auto;
        }
    }


    .card{
        width: 23%;
        margin-left: auto;
        margin-right: auto;
        font-family: serif;
    }

    @media screen and (max-width:767px) {
        .card{
            width: 100%;
            margin-top: 10%;
        
        }
    }
    
    .example-image{
        height: 250px;
    }

    @media screen and (max-width:768px) {
        .example-image{
            height: 150px;
        }
    }
    .card_text{
        margin-top: 5px;
    }

    .card_text p{
        margin-bottom: 5px;
    }

    @media screen and (max-width:768px) {
        .card_text p{
            font-size: small;
        }
    }

    .card_h3 h3{
        margin-top: 0;
    }

    @media screen and (max-width:768px) {
        .card_h3 h3{
            font-size:medium
        }    
    }


    

    footer {
        background-color:#308DE6;
        /* height: 15%; */
        margin-top: 7%;
        width: 100%;
        display: flex;
        overflow: hidden;
        text-align: center;
    }
    
    .left{
        width: 10%;
    }
    
    @media screen and (max-width:768px) {
        .left{
            display: none;
        }
    }
    
    
    .center{
        width: 70%;
    }
    
    @media screen and (max-width:768px) {
        .center{
            width: 30%;
        }
    }
    
    .footer_nav{
        display: flex;
        margin-top: 5%;
    }
    
    @media screen and (max-width:768px) {
        .footer_nav{
            display: block;
            padding-bottom: 2rem;
        }
    }
    
    .footer_nav a{
        text-align: center;
        margin-left: auto;
        margin-right: auto;
        color: white;
        font-size: 1vw;
        white-space: nowrap;
    }

    @media screen and (max-width:768px) {
        .footer_nav a{
          font-size: 2vw;
          line-height: 2.5rem;
        }
      }
    
    @media screen and (max-width:767px) {
        .footer_nav a{
            padding-bottom: 0;
            font-size: 3vw;
            line-height: 1.5rem;
        }
    }
    
    
    .footer_logo{
        margin-top: 4%;
    }
    
    @media screen and (max-width:768px) {
        .footer_logo{
            display: none;
        }
    }
    
    .footer_logo img{
        width: 10%;
        margin-left: 15%;
        margin-right: auto;
    }
    
    .res_center{
        display: none;
    }
    
    @media screen and (max-width:768px) {
        .res_center{
            display: block;
            width: 20%;
        }
    }
    
    .footer_info{
        width: 20%;
        padding-top: 3%;
        /* padding-bottom: 25%; */
        color: white;
        text-align: left;
        padding-left: 3%;
        font-size: 1vw;
    
    }
    
    @media screen and (max-width:768px) {
        .footer_info{
            width: 50%;
            text-align: right;
            padding-right: 3%;
            padding-top: 15%;
            padding-bottom: auto;
            font-size: 2vw;
        }
    }
    
    .footer_info p{
        margin-bottom: 0;
    }
    
    
    .sns{
        overflow: auto;
        width: 50%;
        margin-left: 0;
        margin-right: auto;
        margin-top: 2rem;
        margin-bottom: 2rem;
    }
    
    @media screen and (max-width:768px) {
        .sns{
            margin-right: 0;
            margin-left: auto;
        }
    }
    
    .sns_1{
        float: left;
        height: 2rem;
    }
    
    .sns_2{
        float: right;
        height: 2rem;
    }