@import url(http://fonts.lug.ustc.edu.cn/css?family=Open+Sans:300,400);

.blue {
  background: #3498db;
}

.purple {
  background: #9b59b6;
}

.navy {
  background: #34495e;
}

.green {
  background: #2ecc71;
}

.red {
  background: #e74c3c;
}

.orange {
  background: #f39c12;
}

.cs335, .cs426, .md303, .md352, .md313, .cs240 {
  font-weight: 300;
  cursor: pointer;
}

body {
  background: #e74c3c;
  padding: 20px;
}

*, *:before, *:after {
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
}

table {
  font-family: 'Open Sans', Helvetica;
  color: #efefef;
}
table tr:nth-child(2n) {
  background: #eff0f1;
}
table tr:nth-child(2n+3) {
  background: #fff;
}
table th, table td {
  padding: 1em;
  width: 10em;
}

.days, .time {
  background: #34495e;
  text-transform: uppercase;
  font-size: 0.6em;
  text-align: center;
}

.time {
  width: 3em !important;
}

/* Add this attribute to the element that needs a tooltip */
[data-tooltip] {
  position: relative;
  z-index: 2;
  cursor: pointer;
}

/* Hide the tooltip content by default */
[data-tooltip]:before,
[data-tooltip]:after {
  visibility: hidden;
  pointer-events: none;
}

/* Position tooltip above the element */
[data-tooltip]:before {
  position: absolute;
  bottom: 110%;
  left: 50%;
  margin-bottom: 5px;
  margin-left: -80px;
  padding: 7px;
  width: 160px;
  background-color: black;
  color: #fff;
  content: attr(data-tooltip);
  text-align: center;
  font-size: 14px;
  line-height: 1.2;
}

/* Triangle hack to make tooltip look like a speech bubble */
[data-tooltip]:after {
  position: absolute;
  bottom: 110%;
  left: 50%;
  margin-left: -5px;
  width: 0;
  border-top: 5px solid black;
  border-right: 5px solid transparent;
  border-left: 5px solid transparent;
  content: " ";
  font-size: 0;
  line-height: 0;
}

/* Show tooltip content on hover */
[data-tooltip]:hover:before,
[data-tooltip]:hover:after {
  visibility: visible;
  bottom: 90%;
}