* {
  margin: 0;
  padding: 0;
}

body {
  padding: 0;
  margin: 0;
  background-color: whitesmoke;
  overflow: hidden;
}


#drawing-canvas {
  position: absolute;
  background-color: #000000;
  top: 0px;
  left: 0px;
  z-index: 3000;
  cursor: crosshair;
  touch-action: none;
}

#menu {
  position: fixed;
  float: bottom;

  left: 5px;
  bottom: 5px;
  width: 100%;
  text-align: left;
  padding: 10px 10px 80px 10px;
  margin: 0;
  pointer-events: none;
}

/* #menu button {
  pointer-events:visible;
} */

#topmenu {
  position: absolute;
  float: top;
  top: 5px;
  width: 100%;
  text-align: center;
  font-weight: bold;
  text-decoration: underline;
  font-size: 125%;
  padding-bottom: 2px;
}

#sidemenu {
  height: 100%;
  width: 250pt;
  position: fixed;
  top: 15px;
  left: 10px;
  box-sizing: border-box;
  text-align: justify;
  pointer-events: none;
}

#sidemenu input {
  pointer-events: visible;
}

#footmenu {
  position: absolute;
  bottom: 1px;
  width: 100%;
  text-align: center;
}

button {
  color: rgba(253, 251, 251, 0.75);
  background: rgb(3, 108, 156);
  outline: 1px solid rgba(131, 10, 36, 0.75);
  border: 10px;
  margin: 5px;
  border-radius: 5px;
  padding: 5px 10px;
  cursor: pointer;
}

button:hover {

  background-color: rgba(243, 44, 87, 0.75);
}

button:active {

  background-color: rgba(131, 10, 36, 0.75);
}

#sidemenu button {
  display: block;
  position: relative;
  top: 450px;
  outline: 1px solid black;
  float: unset;
  padding: 1em;
  color: #fff;
  background: rgba(0, 0, 0, 0.8);
  border-radius: .5em;
  font-size: 12px;
  line-height: 1.2;
}

a,
button,
input,
select {
  pointer-events: visible;
}

select {
  margin-bottom: 10px;
  margin-top: 10px;
  outline: 0;
  background: rgb(3, 108, 156);
  ;
  color: #fff;
  border: 1px solid rgba(131, 10, 36, 0.75);
  padding: 4px;
  border-radius: 9px;
}

input {
  border: 2px solid #049EF4;
  border-radius: 8px;
  text-align: center;
}

#dot {
  height: 25px;
  width: 25px;
  background-color: darkred;
  border-radius: 50%;
  display: inline-block;
}

#labels {
  position: absolute;
  /* let us position ourself inside the container */
  left: 0;
  /* make our position the top left of the container */
  top: 0;

}

.label {

  margin-left: 25px;
  font-size: 20px;
}

caption {
  display: table-caption;
  text-align: center;
}

.eqn {
  padding: 0 2em;
  text-align: left;
}

/* display fraction */
.fraction {
  display: inline-block;
  vertical-align: middle;
  margin: 0 0.2em 0.4em;
  text-align: center;
  font-size: 1em;
}

.fraction>span {
  display: block;
  padding-top: 0.15em;
}

.fraction span.fdn {
  border-top: thin solid black;
}

.fraction span.bar {
  display: none;
}

#footermenu {
  padding-left: 50px;
  visibility: visible;
  width: 300px;
  float: inline-end;
  align-items: center;
  justify-content: center;
  background-color: whitesmoke;
  padding-left: 50px;
}

/* annotation */
.annotation {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  padding: 1em;
  width: 250px;
  color: #fff;
  background: rgba(0, 0, 0, 0.8);
  border-radius: .5em;
  font-size: 12px;
  line-height: 1.2;
  transition: opacity .5s;
  overflow-y: auto;
}


#number {
  position: absolute;
  z-index: -1;
}

.labelparts {
  text-align: center;
  font-size: 14px;
  padding: .1em;
  border-radius: 5px;
  color: #fff;
  font-family: sans-serif;
  background: rgba(0, 0, 0, .6);
}


@media only screen and (max-width:800px) {

  #topmenu {
    font-size: 10px;
    float: right;
  }

  button {
    font-size: 10px;
    font-weight: bold;
    border: 5px;
    margin: 2px;
    border-radius: 2px;
    padding: 2px 3px;
  }

  #menu {
    font-size: 10px;
    float: right;
    font-weight: bold;
    padding: 10px 10px 120px 10px;
  }

  #sidemenu {
    font-size: 10px;
    float: right;
    font-weight: bold;
  }

  .annotation {
    display: none;
    width: 200px;
    background: rgb(0, 0, 0);
    overflow-y: auto;
    z-index: 1;
  }

  .fraction {
    font-size: 14px;
  }
}

@media only screen and (max-width:500px) {
  #topmenu {
    font-size: 10px;
  }



  .annotation {
    display: none;
    width: 150px;
    background: rgb(0, 0, 0);
    overflow-y: auto;
    z-index: 1;
  }
}