* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
}

/* Style the header */
header {
  background-color: #666;
  padding: .2em;
  text-align: center;
  font-size: 1.2em;
  color: white;
}

/* Create two columns/boxes that floats next to each other */
nav {
  float: left;
  width: 30%;	/* 20 */
  background: #ccc;
  padding: 20px;
}

/* Style the list inside the menu */
nav ul {
  list-style-type: none;
  padding: 0;
}

table {
  width: 100%;
  height: 30em;
  border: 1px solid black;
}

tr {
height: 35%;
}

td {
  width: 35%;
  border: 1px solid black;
}

button {
  font-size: 1em;
}

#settings {
	font-size: 1.3em;
}

#boxesRows, #boxesCols {
	font-size: 0.9em;
}

#timeRange {
	font-size: 0.9em;
}

#activateBtn {
	font-size: 0.9em;
}

#col_black {
	color: black;
}

#col_white {
	color: white;
}

#col_red {
	color: red;
}

#col_green {
	color: green;
}

#col_blue {
	color: blue;
}

#col_yellow {
	color: yellow;
}

#col_pink {
	color: HotPink;
}

#col_purple {
	color: purple;
}

#col_brown {
	color: SaddleBrown;
}

#col_coral {
	color: coral;
}

article {
  float: left;
  padding: 1em;
  width: 70%;	/* 80 */
  background-color: #f1f1f1;
}

/* Clear floats after the columns */
section::after {
  content: "";
  display: table;
  clear: both;
}

/* Style the footer */
footer {
  background-color: #777;
  padding: 2em;
  text-align: center;
  color: white;
}

/* Responsive layout - makes the two columns/boxes stack on top of each other instead of next to each other, on small screens */
@media (max-width: 600px) {
  nav, article {
    width: 100%;
    height: auto;
  }
}