#page_title {
  text-align: center;
  color: blue;
}

#section_title {
  color: purple;
}

body {
  width: 750px;
  margin: 40px;
}

pre {
  background-color: LightGray; 
  padding: 10px;
}

table {
  table-layout: fixed;
  border: 2px solid;
  border-collapse: collapse;
}

tr {
  border: 1px solid black;
}

td {
  text-align: left;
  border: 1px solid black;
  padding: 5px;
}

th {
  background-color: SlateGray;
  color: white;
  text-align: center;
  border: 1px solid black;
  padding: 5px;
}

/* Tooltip container */
.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black; /* If you want dots under the hoverable text */
}

/* Tooltip text */
.tooltip .tooltiptext {
    visibility: hidden;
    width: 320px;
    top: 100%;
    background-color: SlateGray;
    color: #fff;
    text-align: left;
    padding: 10px;
    border-radius: 6px;
 
    /* Position the tooltip text - see examples below! */
    position: absolute;
    z-index: 1;
}

/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
    visibility: visible;
}