.case {
	text-align: center;
 height: 100%;
  width:100%;
  font-size: 30px;
  background-color: #d0d0d0;
  width: 50px;
  height: 50px;
}

.case_dure {
	text-align: center;
 height: 100%;
  width:100%;
  font-size: 30px;
  background-color: #a0a0a0;
  width: 50px;
  height: 50px;
}

table {
  border: 1px solid black;
}
th {
  border: 1px solid black;
}
td {
  border: 1px solid black;
}
td.chevalet {
  border: 0px solid black;
}


.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 240px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 100%;
  margin-top: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

.head_info
{
  font-size: 30px;
}