* {
	margin: 0;
  	font-family: Arial;
}

html, body, main {
  	height: 100%;
  	overflow: hidden;
  	background-color: #333333;
}

h1 {
  	display: block;
  	background-color: #333333;
  	margin: 0 auto;
  	color: #fff;
  	text-align: center;
  	font-family: 'Pacifico';
  	font-size: 5em;
}

header {
  	display: flex;
  	justify-content: center;
  	text-align: center;
  	margin: 0 auto;
  	color: #fff;
  	text-transform: uppercase;
  	padding: 20px;
}

header .session {
    	font-size: .8em;
    	display: flex;
}
.breakCtrl, .sessionCtrl {
      	display: inline;
      	padding-left: 30px;
      	padding-right: 30px;
}

header .minus {
      	background-color: #333333;
      	color: #fff;
      	border: none;
      	cursor: pointer;
      	font-size: 2em;
      	outline: none;
}

header .plus {
      	background-color: #333333;
      	color: #fff;
      	border: none;
      	cursor: pointer;
      	font-size: 2em;
      	outline: none;
}

header .time {
      	font-size: 2.5em;
      	padding-left: 10px;
      	padding-right: 10px;
}

section {
  	background-color: #333333;
	height: 100%;
  	color: #fff; 
}

section .timer {
    	margin: 0 auto;
    	text-align: center;
    	width: 400px;
    	height: 400px;
    	font-size: 4em;
    	border: 2px solid #99CC00;
    	border-radius: 50%;
    	cursor: pointer;
    	position: relative;
    	z-index: 20;
    	overflow: hidden;
}

section .timer:before {
	content: '';
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	border-radius: 50%;
	z-index: 2;
	border: 4px solid #333333;
}

#countdown-timer {
	background-color : red;
}
section .fill {
    	content: '';
    	position: absolute;
    	background: #99CC00;
    	bottom: 0;
    	right: 0;
    	left: 0;
    	z-index: -1;
}

section .title {
    text-align: center;
    line-height: 180px;
    font-size: .8em;
  }