@import url(https://fonts.googleapis.com/css?family=Open+Sans);

* { box-sizing: border-box; }

body {
  font-family: 'Open Sans', sans-serif;
  font-size: 13px;
  color: #666;
}

/* STRUCTURE */

.wrapper {
	padding: 5px;
	max-width: 960px;
	width: 95%;
	margin: 20px auto;
}
header {
	padding: 0 15px;
}

.columns {
	display: flex;
	flex-flow: row wrap;
	justify-content: center;
	margin: 5px 0;
}

.column {
	flex: 1;
	border: 0px solid gray;
	margin: 2px;
	padding: 10px;
	&:first-child { margin-left: 0; }
	&:last-child { margin-right: 0; }

}

footer {
	padding: 0 15px;
}


@media screen and (max-width: 980px) {
  .columns .column {
		margin-bottom: 5px;
    flex-basis: 40%;
		&:nth-last-child(2) {
			margin-right: 0;
		}
		&:last-child {
			flex-basis: 100%;
			margin: 0;
		}
	}
}

@media screen and (max-width: 680px) {
	.columns .column {
		flex-basis: 100%;
		margin: 0 0 5px 0;
	}
}

#myBtn {
  display: none;
  position: fixed;
  bottom: 10px;
  right: 20px;
  z-index: 99;
  font-size: 13px;
  border: solid 1px #cccccc;
  outline: none;
  background-color: #ffffff;
  color: #666;
  cursor: pointer;
  padding: 5px;
  border-radius: 4px;
}

#myBtn:hover {
  background-color: #555;
  color: #ffffff;
}

.spacer {
  padding: 20px;
}