/* CSS is how you can add style to your website, such as colors, fonts, and positioning of your
   HTML content. To learn how to do something, just try searching Google for questions like
   "how to change link color." */



/* Style the header */
header {
  background-color: #666;
  width: 970px;
  padding: 40px;
  text-align: center;
  font-size: 35px;
  color: white;
  margin-left: 365px;
}

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  width: 97px;
  height: 300px ;
  background: #ccc;
  padding: 15px;
  margin-left: 375px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: none;
  padding: 0;
}

article {
  float: left;
  padding: 15px;
  width: 873px;
  height: 300px;
  background-color: #f1f1f1;
}

/* Clear floats after the columns */
section::after {
  content: "";
  display: table;
  clear: both;
}

/* Style the footer */
footer {
  background-color: #777;
  padding: 30px;
  width: 990px;
  height: 30px;
  text-align: center;
  color: white;
  margin: auto;
}

/* Responsive layout - makes the two columns/boxes stack on top of each other instead of next to each other, on small screens */
@media (max-width: 600px) {
  nav, article {
    width: 100%;
    height: auto;
  }
}


.invisible-area {
  position: absolute;
  height: 100px;
  width: 100px;
}

.area-one{
    top: 135px; 
    left: 90px;
}
.area-two {
  top: 135px; 
  left: 275px; 
}
.tooltip {
  display: none;
 /*optional tooltip design*/
  background: white;
  border-radius: 5px;
  border: 1px black solid;
}
.invisible-area:hover .tooltip {
  display: block;
}