* {
	box-sizing: border-box;
	padding: 0;
	margin: 0;
  }
  body {
	font-size: 100%;
	font-weight: 300;
	color: #888;
	width: 100%;
  }
  img {
	max-width: 100%;
  }
  nav {
	border: 0;
	-o-transition: all 0.3s;
	-moz-transition: all 0.3s;
	-webkit-transition: all 0.3s;
	-ms-transition: all 0.3s;
	transition: all 0.3s;
	text-align: left;
	margin-left: 30px;
  }
  header {
	display: block;
	  background-image: url(../../images/ebook-banner/lecon3.png);
	  background-repeat: no-repeat;
	  background-position: center;
	  width: 100%;
	  height: 171px;
  }
  .small-grid .pencil {
	background-image: url(../../images/pencil.png);
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100%;
	height: 40px;
	width: 35px;
	margin: 10px 0 0 5px;
  }
  .small-grid .puzzle {
	background-image: url(../../images/puzzle.png);
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100%;
	height: 40px;
	width: 35px;
	margin: 10px 0 0 5px;
  }
  .small-grid .no_puzzle {
	height: 40px;
	width: 35px;
	margin: 10px 0 0 5px;
  }
  .small-grid .headphones {
	background-image: url(../../../Unit-02/images/audio/headphones.png);
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100%;
	height: 40px;
	width: 40px;
	margin: 10px 0 0 5px;
	display: none !important;
  }
  .head_number {
	display: block;
	width: 15px;
	height: 20px;
	color: #000;
	text-align: center;
	position: relative;
	left: 12px;
	font-family: "PFTransport-Regular";
	top: 10px;
	font-weight: 600;
  }
  .small-grid .cd {
	background-image: url(../../images/cd-9.png);
	background-repeat: no-repeat;
	background-position: center;
	background-size: 100%;
	height: 40px;
	width: 40px;
	margin: 10px 0 0 5px;
  }
  .small-grid .exer_number {
	margin: 15px 0 0 5px;
  }
  .number {
	display: block;
	width: 32px;
	height: 32px;
	text-align: center;
	position: relative;
	font-family: "PFCentroSlabPro-Medium";
	font-weight: bold;
	border-radius: 50%;
	line-height: 1.4em;
	background-color: #6ac17b;
	color: #ffff;
	font-size: 23px;
  }
  .small-grid,
  .item-grid {
	/* width: 90%; */
	padding: 0;
	margin: 0;
  }
  .item-grid li {
	list-style-type: none;
	margin: 0 17px 40px 15px;
	padding: 0;
	display: inline-block;
	*display: inline;
	zoom: 1;
	vertical-align: top;
  }
  .small-grid li {
	/*border: 1px solid rgba(0, 0, 0, 0.2);*/
	list-style-type: none;
	padding: 0;
	display: inline-block;
	*display: inline;
	zoom: 1;
	vertical-align: top;
  }
  .small-grid .left {
	margin: 5px -28px 0 -5px;
	height: auto;
	text-align: center;
  }
  .small-grid .center {
	margin: 20px 0 0 5px;
	height: auto;
  }
  /*---------------- header -----------------------*/
  .container {
	width: 900px;
	display: block;
	text-align: center;
	background: #fff;
  }
  section {
	width: 900px;
	margin: 0 auto;
	background: #fff;
  }
  .prosfonisi > p {
	line-height: 1.3em;
	color: #000;
	font-size: 20px;
	font-weight: normal;
	font-family: "PFCentroSlabPro-Medium";
	text-align: left;
  }
  /*-------------------title--------------------------*/
  .column {
	padding: 0;
	display: inline-block;
	vertical-align: top;
	margin: 2% 0 2% 3.5em;
	width: 80%;
  }
  
  .column.image {
	background-image: url(../../images/exercises-images/p7_exer1_3.PNG);
	background-repeat: no-repeat;
	background-position: center;
  
	height: 150px;
	width: 950px;
  }
  
  .column.image2 {
	background-image: url(../../images/exercises-images/p7_exer1_4.PNG);
	background-repeat: no-repeat;
	background-position: center;
  
	height: 150px;
	width: 950px;
  }
  .column.image3 {
	background-image: url(../../images/exercises-images/p7_exer1_5.PNG);
	background-repeat: no-repeat;
	background-position: center;
  
	height: 150px;
	width: 950px;
  }
  .box {
	display: inline-block;
	margin: 0 auto;
	position: relative;
  }
  .box.exer1 {
	top: 150px;
	left: -50px;
  }
  .box.exer2 {
	top: 150px;
	left: -20px;
  }
  .box.exer3 {
	top: 150px;
	left: 15px;
  }
  .box.exer4 {
	top: 150px;
	left: 52px;
  }
  .box.exer5 {
	top: 150px;
	left: -30px;
  }
  .box.exer6 {
	top: 150px;
	left: 0px;
  }
  .box.exer7 {
	top: 150px;
	left: 35px;
  }
  .video_player {
	background-image: url(../../images/video2.png);
	background-repeat: no-repeat;
	display: block;
	position: relative;
	text-align: left;
	width: 110px;
	height: 55px;
  
	margin: 1% 0 0 8%;
  }
  
  span.blue {
	color: #025b94;
	display: block;
	width: 265px;
	font-family: "PFTransport-Regular";
	text-align: left;
	position: relative;
	/* height: 40px; */
  
	line-height: 2.5em;
	font-size: 22px;
	padding: 1px;
	margin-left: 42px;
  }
  
  .clearfix {
	width: 100%;
	clear: both;
	height: 20px;
  }
  .drag-grid {
	font-family: "PFEarthbound-Regular";
	display: block;
	text-align: center;
	height: 50px;
	margin: 15px auto 0 auto;
	padding: 0;
	background: #cae8dd;
	border-top: 2px #cae8dd solid;
	border-bottom: 2px #cae8dd solid;
	width: 65%;
  }
  .drag-grid li {
	list-style-type: none;
	margin: 7px 5px 0 5px;
	padding: 0;
	display: inline-block;
	*display: inline;
	zoom: 1;
	vertical-align: top;
	cursor: all-scroll;
	z-index: 1;
  }
  .drag-grid li {
	/* background-color: #6FC696; */
	width: auto;
	padding: 3px;
	height: auto;
	font-size: 18px;
	color: #000;
  }
  label {
	font-family: "PFTransport-Regular";
	top: 0;
	color: #000;
	font-size: 17px;
	display: block;
	padding: 1px;
	text-align: left;
	line-height: 1.8em;
  }
  .greyspan {
	width: 100px;
	display: inline-block;
	color: #999;
	text-align: right;
  }
  .input2 {
	width: 170px;
	text-align: center;
	font-family: "PFTransport-Regular";
	border: none;
	position: relative;
	border-bottom: 1px dashed #000;
	font-size: 16px;
	background: none;
	padding: 0;
	top: 0;
	left: 0;
	margin: 0;
  }
  .input1 {
	width: 200px;
	text-align: left;
	font-family: "PFTransport-Regular";
	border: none;
	position: relative;
	border-bottom: 1px dashed #000;
	font-size: 17px;
	background: none;
	padding: 0;
	top: 0;
	left: 0;
	margin: 0;
  }
  
  .input3 {
	width: 140px;
	text-align: left;
	font-family: "PFTransport-Regular";
	border: none;
	position: relative;
	border-bottom: 1px dashed #000;
	font-size: 17px;
	background: none;
	padding: 0;
	top: 0;
	left: 0;
	margin: 0;
  }
  
  
  footer {
	  left: 0;
	  bottom: 0;
  
	  width: 100%;
	  overflow: hidden;
  }
  
  label.btn span {
	font-size: 1.4em;
	margin: 5px;
	padding: 4px;
  }
  .fa-2x {
	font-size: 1.5em !important;
  }
  label input[type="radio"] ~ i.fa.fa-circle-o {
	color: #c8c8c8;
	display: inline;
  }
  label input[type="radio"] ~ i.fa.fa-dot-circle-o {
	display: none;
  }
  label input[type="radio"]:checked ~ i.fa.fa-circle-o {
	display: none;
  }
  label input[type="radio"]:checked ~ i.fa.fa-dot-circle-o {
	color: #7aa3cc;
	display: inline;
  }
  label:hover input[type="radio"] ~ i.fa {
	color: #7aa3cc;
  }
  label input[type="checkbox"] ~ i.fa.fa-square-o {
	color: #000;
	display: inline;
  }
  label input[type="checkbox"] ~ i.fa.fa-check-square-o {
	display: none;
  }
  label input[type="checkbox"]:checked ~ i.fa.fa-square-o {
	display: none;
  }
  label input[type="checkbox"]:checked ~ i.fa.fa-check-square-o {
	color: #00aeef;
	display: inline;
  }
  label:hover input[type="checkbox"] ~ i.fa {
	color: #00aeef;
  }
  div[data-toggle="buttons"] label.active {
	color: #000;
  }
  div[data-toggle="buttons"] label {
	display: inline-block;
	padding: 10px 5px;
	margin-bottom: 0;
	font-size: 14px;
	font-weight: normal;
	/*  line-height: 2em;*/
	text-align: left;
	white-space: nowrap;
	vertical-align: top;
	cursor: pointer;
	background-color: none;
	border: 0px solid #fff;
	border-radius: 3px;
	/*color: #c8c8c8;*/
	color: #000;
  
	-webkit-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	-o-user-select: none;
	user-select: none;
	text-shadow: none;
  }
  div[data-toggle="buttons"] label:hover {
	color: #000;
	text-shadow: 0 0 9px #fff;
  }
  div[data-toggle="buttons"] label:active,
  div[data-toggle="buttons"] label.active {
	-webkit-box-shadow: none;
	box-shadow: none;
  }
  .btn-group,
  .btn-group-vertical {
	position: relative;
	display: inline-block;
	vertical-align: middle;
	padding: 0;
  }
  .btn-group > .btn,
  .btn-group-vertical > .btn {
	position: relative;
	float: left;
  }
  .btn-group > .btn:hover,
  .btn-group-vertical > .btn:hover,
  .btn-group > .btn:focus,
  .btn-group-vertical > .btn:focus,
  .btn-group > .btn:active,
  .btn-group-vertical > .btn:active,
  .btn-group > .btn.active,
  .btn-group-vertical > .btn.active {
	z-index: 2;
  }
  .btn-group-vertical > .btn,
  .btn-group-vertical > .btn-group,
  .btn-group-vertical > .btn-group > .btn {
	display: block;
	float: none;
	width: 100%;
	max-width: 100%;
  }
  .btn-group-vertical > .btn-group > .btn {
	float: none;
  }
  .btn-group-vertical > .btn:not(:first-child):not(:last-child) {
	border-radius: 0;
  }
  .btn-group-vertical > .btn:first-child:not(:last-child) {
	border-top-right-radius: 4px;
	border-bottom-right-radius: 0;
	border-bottom-left-radius: 0;
  }
  .btn-group-vertical > .btn:last-child:not(:first-child) {
	border-bottom-left-radius: 4px;
	border-top-right-radius: 0;
	border-top-left-radius: 0;
  }
  .btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
	border-radius: 0;
  }
  .btn-group-vertical > .btn-group:first-child:not(:last-child) > .btn:last-child,
  .btn-group-vertical
	> .btn-group:first-child:not(:last-child)
	> .dropdown-toggle {
	border-bottom-right-radius: 0;
	border-bottom-left-radius: 0;
  }
  .btn-group-vertical
	> .btn-group:last-child:not(:first-child)
	> .btn:first-child {
	border-top-right-radius: 0;
	border-top-left-radius: 0;
  }
  [data-toggle="buttons"] > .btn > input[type="radio"],
  [data-toggle="buttons"] > .btn > input[type="checkbox"] {
	display: none;
  }
  @media only screen and (max-width: 13000px) {
	.column {
	  /* width:350px;*/
	}
  }
  
  @media only screen and (max-width: 1000px) {
	.column {
	  /*   width:250px;*/
	}
  }
  
  span.colored {
	color: #6ac17b;
	display: inline-block;
	width: 20px;
	font-family: "PFTransport-Regular";
  }
  
  .left-al {
	width: 100%;
  }
  
  .flex-1 {
	display: flex;
	flex-direction: row;
	align-items: center;
	margin-left: 8em;
  }
  
  .flex-img {
	width: 500px;
  }
  
  /*-------keyboard-----------------------*/
  
  * {
	margin: 0;
	padding: 0;
	position: relative;
  }
  
  .toggle,
  .toggler {
	display: inline-block;
	vertical-align: top;
	margin: 2% auto auto 10px;
  }
  
  .toggler {
	color: slategray;
	transition: 0.2s;
  }
  
  .toggler--is-noactive {
	background: url(../../../assets/images/off.png);
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	background-size: 100%;
	background-repeat: no-repeat;
	width: 40px;
	height: 25px;
  }
  
  .toggler--is-active {
	color: black;
	background: url(../../../assets/images/on.png);
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	background-size: 100%;
	background-repeat: no-repeat;
	width: 40px;
	height: 25px;
  }
  
  .b {
	display: block;
  }
  
  .toggle {
	width: 45px;
	height: 25px;
	border-radius: 100px;
	background-color: #ccc;
	overflow: hidden;
	box-shadow: inset 0 0 2px 1px rgba(0, 0, 0, 0.05);
  }
  
  .cc {
	width: 45px;
	height: 25px;
	border-radius: 100px;
	background-color: #2ecc71;
	overflow: hidden;
	box-shadow: inset 0 0 2px 1px rgba(0, 0, 0, 0.05);
  }
  
  .check {
	position: absolute;
	display: block;
	cursor: pointer;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	opacity: 0;
	z-index: 6;
  }
  
  .check:checked ~ .switch {
	right: 2px;
	left: 37.5%;
	transition: 0.25s cubic-bezier(0.785, 0.135, 0.15, 0.86);
	transition-property: left, right;
	transition-delay: 0.08s, 0s;
  }
  
  .switch {
	position: absolute;
	left: 2px;
	top: 2px;
	bottom: 2px;
	right: 37.5%;
	background-color: #fff;
	border-radius: 36px;
	z-index: 1;
	transition: 0.25s cubic-bezier(0.785, 0.135, 0.15, 0.86);
	transition-property: left, right;
	transition-delay: 0s, 0.08s;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  }
  
  /*-------keyboard end-----------------------*/
  
  .flex-2 {
	display: flex;
	flex-direction: row;
	align-items: center;
	width: 850px;
  }