.SignBoard{
    background-image:url(img/SignBoard.jpg);             /* 逕ｻ蜒上・URL繧呈欠螳・      */
    background-repeat:  no-repeat;                /* 逕ｻ蜒上・郢ｰ繧願ｿ斐＠繧呈欠螳・ */              
    width:auto;                                   /* 讓ｪ蟷・・繧ｵ繧､繧ｺ繧呈欠螳・   */
    height:400pX;                                 /* 邵ｦ蟷・・繧ｵ繧､繧ｺ繧呈欠螳・   */
}


html, body {
  height: 100%;
  margin: 0;
}

.wrapper {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
}

.footer {
  height: 60px;
  background: #333;
  color: white;
  text-align: center;
  line-height: 60px;
}