:root{
    --header_height : 85px;
}
*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
input[type="submit"],
input[type="button"] {
  border-radius: 0;
  -webkit-box-sizing: content-box;
  -webkit-appearance: button;
  appearance: button;
  border: none;
  box-sizing: border-box;
  cursor: pointer;
}
input[type="submit"]::-webkit-search-decoration,
input[type="button"]::-webkit-search-decoration {
  display: none;
}
input[type="submit"]::focus,
input[type="button"]::focus {
  outline-offset: -2px;
}

body{
    background-position: center;
    background-size: cover;
    font-size: 16px;
    letter-spacing: 0.2em;
    font-family: 'Noto Sans CJK JP';
}


/**
 *  ヘッダー
 */
header{
    display: flex;
    align-items:center;

    border-top: solid 5px #102629;
    padding: 0 40px;
    height: var(--header_height);
    background: white;
}
@media screen and (max-width:480px){
    header{
        justify-content: center;
    }
}




/**
 *  メイン
 */
main{
    display: flex;
    align-items: center;
    justify-content: center;

    position: relative;
    min-height: calc(100vh - var(--header_height));
    background-color: rgba(0,0,0,0.3);
}


/**
 *  フォーム
 */
main form{
    width: 440px;
    color: white;
    font-weight: 900;
    text-align: center;
    padding: 40px 0;
}
main form h1{
    font-family: "Oswald";
    height: 80px;
    line-height: 80px;
    font-size: 50px;
}
main form h2{
    margin-bottom: 30px;
}
main form .input{
    display: inline-block;
    width: 100%;
    height: 60px;
    border-radius: 3px;
    border: solid 1px #707070;
    margin: 5px 0;
    padding: 20px;
}
main form .is-invalid{
    border: solid 2px red;
}
main form .remember-box{
    font-size: 14px;
    margin-bottom: 30px;
    line-height: 14px;
}
main form .remember-box input{
    position: relative;
    top:5px;
    width: 20px;
    height: 20px;
}
main ._button{
    display: inline-block;
    width: 100%;
    height: 60px;
    border-radius: 3px;
    background: #209E91;
    border: none;
    color: white;
    font-size: 16px;
    font-weight: 900;
    font-family: 'Noto Sans CJK JP';
    letter-spacing: 0.2em;
    cursor: pointer !important;
}
main form .forgot-box{
    margin-top: 40px;
}
main form .forgot-box a{
    position: relative;
    color: white;
}
main form .forgot-box a:before{
    position: absolute;
    top: 5px;
    left: -20px;
    content: "";
    width: 0;
    height: 0;
    border-top: solid 5px white;
    border-right: solid 5px white;
    border-left: solid 5px transparent;
    border-bottom: solid 5px transparent;
    transform: rotate(45deg);
}
span[role=alert]{
    display: inline-block;
    font-size: 14px;
    color: #ff0000;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}
.success{
    display: inline-block;
    font-size: 20px;
    color: #00ff00;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}
@media screen and (max-width:480px){
    main form h1{
        font-size: 40px;
    }
}
/*メール送信*/
main form .send-button{
    margin-top: 40px;
}