.gallery img{
    width: 100%;
 }
#menu{
      width:100%;
      height:40px;
      background-color: Grey;
      padding-top: 20px;
      padding-bottom: 20px;
}

#menu a{
      color:#ffffff;
      font-family: Helvetica, sans-serif;
      font-size: 18px;
      text-decoration:none;
      font-weight: 800px;
      
      padding-left: 20px;
      padding-right: 20px;
}

#menu a:hover{
       color: black;
}