#button_stop {
  position: absolute;
  right: 100px;
  top: 0px;
  width: 73px;
  height: 73px;
}

#button_circuit {
  position: absolute;
  right: 73px;
  top: 73px;
  width: 73px;
  height: 73px;
}

#button_code {
  position: absolute;
  right: 0px;
  top: 93px;
  width: 73px;
  height: 73px;
}

#board_name {
  width: 100px;
}

.modalmenu {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgb(0, 0, 0);
  background-color: rgba(0, 0, 0, 0.4);
}

.modalmenu-content {
  background-color: #fefefe;
  margin: 7% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  border-radius: 20px;
}

#modalmenu-content-circuit {
  background-color: #fefefe;
  margin: 4.5% auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  border-radius: 20px;
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

#youtube-player {
  display: flex;
  justify-content: center;
}

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

.tooltip .tooltiptext {
  position: absolute;
  visibility: hidden;
  width: 150px;
  background-color: #555;
  color: #fff;
  text-align: center;
  padding: 5px 0;
  border-radius: 6px;

  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -60px;

  opacity: 0;
  transition: opacity 0.3s;
}

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

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