.modal-container{
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    height: 100%;
    text-align: center;
    padding: 40px 20px;
    opacity: 0;
    visibility: hidden;
    transition: .3s;
    box-sizing: border-box;
}
  /*モーダル本体の擬似要素の指定*/
.modal-container:before{
    content: "";
    display: inline-block;
    vertical-align: middle;
}
  /*モーダル本体に「active」クラス付与した時のスタイル*/
.modal-container.active{
    opacity: 1;
    visibility: visible;
    z-index: 100;
}
  /*モーダル枠の指定*/
.modal-body{
    position: relative;
    display: inline-block;
    vertical-align: middle;
}
  /*モーダル内のコンテンツの指定*/
.modal-content{
    background: #fff;
    padding: 60px 30px 70px 30px;
    border-radius: 10px;
    box-shadow: 0 0 8px rgba(128,128,128,50%);
}
.title{
    font-size: 30px;
    font-weight: bold;
    color: rgba(54,75,154,100%);
    background-color: rgba(100,214,237,20%);
    padding: 18px 125px;
    text-align: center;
    align-items: center;
}
.main-contents{
    padding: 0 45px;
}
.sub-title{
    font-size: 24px;
    font-weight: bold;
    color: rgba(54,75,154,100%);
    text-align: center;
    padding: 30px 0;
}
.main-text{
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    line-height: 1.8;
    margin: auto auto 10px auto;
}
.confirm{
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin: 50px 0px 30px 0px;
}
.flexible{
    display: flex;
    justify-content: center;
    font-size: 16px;
    gap: 23px;
}
.choice{
    border: 0px;
    border-radius: 5px;
    background-color: rgba(54,75,154,60%);
    color: #FFFFFF!important;
    padding: 22px 40px;
    text-align: center;
    width: 210px;
    cursor: pointer;
    text-decoration: none!important;
}
.choice:hover{
    background-color: rgba(54,75,154,20%);
}


@media screen and (max-width:640px)
{
    .modal-content{
        padding: 40px 20px;
    }
    .title{
        font-size: 18px;
        padding: 15px 5px;
    }
    .main-contents{
        padding: 0 10px;
    }
    .main-text{
        text-align: left;
        font-size: 12px;
        font-weight: normal;
        margin: auto auto 10px auto;
    }
    .flexible{
        display:grid;
        justify-content: center;
        font-size: 14px;
        gap: 10px;
    }
    .choice{
        padding: 20px 20px;
        text-align: center;
        width: 180px;
    }
}