td {
  width: 45px;
  height: 45px;
  background-color: rgb(42,42,42);
  border: 1px solid white;
  padding: 0;
  margin: 0;
  font-size: 24px;
  font-family: Arial, Helvetica, sans-serif;
}
#table{
  margin: auto;
  border: 2px solid black;
  text-align: center;
  user-select: none;
  cursor: crosshair;
}
header{
  margin: auto;
}
.input {
  margin-bottom: 5px;
  width: 110px;
}
.inline {
  display: inline-block;
  margin-right: 50px;
  margin: auto;
  padding: 10px;
  border: 2px solid black;
  border-radius: 4px;
}
.time{
  display: inline;
  text-align: center;
  font-weight: bold;
  font-size: 5em;
  margin-right: 50px;
  float: right;
}
.button {
  background-color: #017310;
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  font-size: 16px;
  margin: 4px;
  opacity: 0.8;
  transition: 0.3s;
  display: inline-block;
  text-decoration: none;
  cursor: pointer;
}
article {
  height: 100%;
}
.button:hover {opacity: 1}

footer {
  text-align: center;
  margin: auto;
  bottom: 0;
}

.hard{
  position: absolute;
  width: 100px;
  margin-right: auto;
  margin-left: auto;
  left: 50%;
}

/*radio buttons*/
.container {
  display: block;
  position: relative;
  padding-left: 35px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 17px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  font-family: arial,sans-serif;
  font-weight: bold;
}

.container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 25px;
  width: 25px;
  background-color: #eee;
  border-radius: 50%;
}

.container:hover input ~ .checkmark {
  background-color: #ccc;
}

.container input:checked ~ .checkmark {
  background-color: #13e3eb;
}
.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.container input:checked ~ .checkmark:after {
  display: block;
}

.container .checkmark:after {
 	top: 9px;
	left: 9px;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: white;
}

 /*Cells*/
 .cell:hover {
   background-color: yellow !important;
 }

.hardCell {
  background-color: purple;
}

.stepCell {
  background-color: lime;
}

.stepCell:hover {
  background-color: yellow;
}

.hardCell.stepCell {
  background-color: green;
}

.hardCell.stepCell:hover {
  background-color: yellow;
}

.currentCell {
  background-color: darkorange;
}

.passedCell {
 background-color: red;
}