html,body {
    height: 100%;
}
body { background: url('//plaza.umin.ac.jp/~ai-ai/img/farmer.png'); }
p {
    font-size: 16px;
}
.wrapper {
    min-height: 100%;
    position: relative;
}
#content-wrapper {
    padding-bottom: 36px;
}
#footer {
    position: absolute;
    width: 100%;
    bottom: 0;
    height: 36px;
    line-height: 36px;
    text-align: center;
    background: #222;
    color: #eee;
    font-weight: bold;
    padding: 0;
}


.content-area {
    background: #fff;
    padding: 2em;
}
.login-form-header p {
    padding: 10px 50px;
}
.content-area h1 {
    font-size: 27px;
    border-bottom: 1px solid #ddd;
}
.content-area form {
    background: #eeeeee;
    margin: 0 50px;
    padding: 20px 10px 20px 0;
}

.case-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.case-list .case-unit {
    box-shadow: 0 2px 2px 1px #ddd;
    margin-bottom: 30px;
    border: 1px solid #A5A5A5;
    border-radius: 2px;
    display: block;
    width: 250px;
    height: 250px;
    float: left;
    margin-right: 20px;
}
.case-list li .case-title {
    font-weight: bold;
    font-size: 20px;
    border-bottom: 1px solid #0F5EA2;
    margin-bottom: .5em;
}
.case-list li a {
    padding: 1em;
    display: block;
    height: 100%;
    text-decoration: none;
    overflow: hidden;
}
.case-list li a:hover {
    background: #eee;
}
.case-desc {
    text-overflow: ellipsis;
    overflow: hidden;
    height: 180px;
    color: #333;
}
a.case-image {
    display: inline-block;
    padding: 5px;
    border: 1px solid #ddd;
    margin: 10px;
}
a.case-image:hover {
    border-color: #007DE8;
}
.case-image img {
    height: 180px;
}
.case-image figcaption {
  text-align: center;
  font-weight: bold;
}
h2 {
    font-size: 19px;
    font-weight: bold;
    background: #2b669a;
    color: #fff;
    padding: 5px .5em;
}

#showAnswer {
    margin: 40px 0 0;
}
#answer {
    display: none;
    padding: 40px 0;
}
#answer h2 {
    margin-top: 40px;
}
#answer h2:first-child {
    margin-top: 20px;
}
.back-to-index {
    margin: 2em 0;
}

.mb-10 {margin-bottom: 10px;}
.mb-20 {margin-bottom: 20px;}
.mb-30 {margin-bottom: 30px;}
.mb-40 {margin-bottom: 40px;}
.mt-10 {margin-top: 10px;}
.mt-20 {margin-top: 20px;}
.mt-30 {margin-top: 30px;}
.mt-40 {margin-top: 40px;}