html, body {
    height: 100%;
    margin: auto;
    display: block;
    font-family: 'Open Sans',sans-serif;
    font-size: 1rem;
    line-height: 1.6;
}
#content {
    background-image: url("background.jpg");
    height: 97%;
    width: 100%;
    background-position: center ;
    background-repeat: no-repeat;
    background-size: cover;
}
.scroll {
    overflow-y: scroll;
}
#footer {
    position: fixed;
    background-color: #000;
    height: 3%;
    width: 100%;
    text-align: center;
    color: #ccc;
    margin: 0;
}
#footer div {
    margin: auto;
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}
#footer div a {
    color: #ccc;
    text-decoration: none;
}
#footer div a:hover {
    color: #fff;
}
.overlay {
    position: relative;
    background-color: rgba(255, 255, 255, 0.7);
    width: 600px;
    min-height: 20%;
    top: 50%;
    transform: translateY(-50%);
    margin: auto;
    padding: 20px;
    text-align: center;
}
.overlay h2 {
    margin-top: 0;
}
.overlay a {
    text-decoration: none;
    color: #000;
}
.overlay a:hover {
    color: #888;
}
#impress {
    text-align: left;
    top: auto;
    transform: none;
}
#contact {
    text-align: left;
    width: 50%;
    margin: auto;
    padding: auto;
}
#contact span {
    min-width: 100px;
    display: inline-block;
}
.left {
    text-align: left;
    float:left;
}
#mail input[type="submit"] {
    width: 120px;
    border: 1px solid #fff;
    border-style: none;
    padding: 10px;
    background: #fff;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 5px;
}
.mail {
    padding: 10px 0;
    margin-top: 5px;
}