body {
    padding: 0;
    margin: 0;
    background-color: #F0FFF0;
}

header {
    background: linear-gradient(to right, #009933, #66CC00);;
    height: 20%;
    color: #ffffff;
}
h1 {
    position: relative;
    color: white;
    background: #81d0cb;
    line-height: 1.4;
    padding: 0.5em 0.5em 0.5em 1.8em;
  }
  
  h1:before {
    font-family: "Font Awesome 5 Free";
    content: "\f14a";
    font-weight: 900;
    position: absolute;
    left : 0.5em; /*左端からのアイコンまでの距離*/
  }

h3 {
    position: relative;/*相対位置*/
    padding: 0.5em 0.5em 0.5em 1.5em;/*アイコン分のスペース*/
    line-height: 1.4;/*行高*/
    color: #330000;/*文字色*/
    border-top: dotted 1px gray;
    border-bottom: dotted 1px gray;
    background: #fffff4;
  }
  
  h3:before {
    font-family: "Font Awesome 5 Free";/*忘れずに*/
    content: "\f138";/*アイコンのユニコード*/
    font-weight: 900;
    position: absolute;/*絶対位置*/
    font-size: 1em;/*サイズ*/
    left: 0.25em;/*アイコンの位置*/
    top: 0.5em;/*アイコンの位置*/
    color: #ff6a6a; /*アイコン色*/
  }
.box {
    position: relative;
    padding: 0.25em 1em;
    top: 0;
    background: #efefef;
    width: 80%;
    margin-left: 3%;
    margin-bottom: 0;

    font-size: x-large;
    }
    .box:before, .box:after{ 
        position: absolute;
        top: 0;
        content:'';
        width: 10px;
        height: 100%;
        display: inline-block;
        box-sizing: border-box;
    }
    .box:before{
        border-left: dotted 2px #15adc1;
        border-top: dotted 2px #15adc1;
        border-bottom: dotted 2px #15adc1;
        left: 0;
    }
    .box:after{
        border-top: dotted 2px #15adc1;
        border-right: dotted 2px #15adc1;
        border-bottom: dotted 2px #15adc1;
        right: 0;
    }
    .box p {
        margin: 0; 
        padding: 0;
    }

.form{
    padding: 0.5em 1em;
    margin: 2em 0;
    color: #474747;
    background: whitesmoke;/*背景色*/
    border-left: double 7px #4ec4d3;/*左線*/
    border-right: double 7px #4ec4d3;/*右線*/
    }
    .form p {
        margin: 0; 
        padding: 0;
    }
form {
    padding-left: 15px;
    border-left: solid;
    border-left: #eeeeee;
}

ul {
    list-style: none;
    padding-left: 0;
    margin-left: 0;
}

input#button {
    width: 200px;
    height: 40px;
    margin-left: 1%;
}

#login_status {
    color: #ff4500;
    font-weight: 600;
}

.login_btn {
    border-radius: 10px;
    background-color: #7288da;
    color: #ffffff;
    font-size: x-large;
    line-height: 2em;
    font-weight: 600;
    width: 200px;
    height: 50px;
}

.login_btn img{
    top: 20px;
    height: 50px;
    width: auto;
    float: left;
}

.login_btn a {
    color: #ffffff;
    font-size: larger;

}

.login_btn a:hover {
    color: #ffffff;
}

@media only screen and (min-width: 769px){

    .logo {
        width: 400px;
        height: 100%;
        float: left;
    }

    .main {
        margin-left: 5%;
        margin-right: 5%;
        padding: 0;
        padding-bottom: 50px;
        width: 70%;
        float: left;
    }
    .side_menu {
        top: 15px;
        width: 22%;
        background-color: ffffff;
        margin-left: 76%;
        margin-right: 5px;
        padding: 0;
        border-radius: 10px;
        position: sticky;

    }
    
    .side_menu::after {
        clear: both;
    }

    footer {
        clear: both;
    }

}

@media only screen and (max-width: 768px){
    .main form{
        margin: 0;
        padding: 0;
    }
    .logo {
        width: 80%;
        height: 100%;
        float: left;
    }
    
}

footer {
    padding-top: 30px;
    padding-right: 15px;
    background-color: #6B8E23;
    text-align: right;
    color: #ffffff;
}