* {
  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/lecon1.png);
  background-repeat: no-repeat;
  margin: 0 auto;
  width: 850px;
  height: 181px;

  position: relative;
}

.small-grid .pencil {
  background-image: url(../../images/01-52.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100%;
  height: 40px;
  width: 40px;
  margin: 10px 0 0 5px;
  display: none !important;
}
.small-grid .headphones {
  background-image: url(../../images/headphones.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100%;
  height: 40px;
  width: 40px;
  margin: 10px 0 0 5px;
}
.head_number {
  display: block;
  width: 15px;
  height: 20px;
  color: #000;
  text-align: center;
  position: relative;
  left: 10px;
  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;
}
.green_box {
  display: block;

  padding: 2px;
  margin: 2px;
  width: 200px;
  background-color: #add580;
  box-shadow: 3px 3px;
  margin-left: 105px;
  position: relative;
}
span.green_title {
  color: #fff;
  font-size: 20px;
  font-family: "Chalkduster Regular";
}

.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: #9fd18a;
  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: 1% auto;
}
.column.image {
  background-image: url(../../images/exercises-images/p21_exer1.PNG);
  background-repeat: no-repeat;
  height: 440px;
  width: 850px;
}

.clearfix {
  width: 100%;
  clear: both;
  height: 20px;
}
.drag-grid {
  display: block;
  text-align: center;
  height: 100px;
  margin: 15px auto 0 auto;
  padding: 0;
  border-top: 2px #00617f solid;
  border-bottom: 2px #00617f solid;
  width: 60%;
}
.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: 15px;
  color: #000;
}
label {
  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: 340px;
  text-align: left;

  border: none;
  position: relative;
  border-bottom: 1px dashed #000;
  font-size: 16px;
  background: none;
  padding: 0;
  top: 0;
  left: 0;
  margin: 0;
}
.input1 {
  width: 29px;
  text-align: center;
  font-family: "PFReminder-Medium";
  border: none;
  position: relative;
  font-size: 16px;
  box-shadow: rgba(0, 0, 0, 0.25) 0px 14px 28px,
    rgba(0, 0, 0, 0.22) 0px 10px 10px;
  padding: 0;
  top: 0;
  left: 0;
  margin: 0;
  height: 29px;
  border: 1px solid #69c8c7;
  border-radius: 50%;
  background-color: #fff;
}

.box {
  display: inline-block;
  margin: 0 auto;
  position: relative;
}

.exer1 {
  position: relative;
  top: 124px;
  left: -230px;
}
.exer2 {
  position: relative;
  top: 124px;
  left: -100px;
}
.exer3 {
  position: relative;
  top: 124px;
  left: 60px;
}
.exer4 {
  position: relative;
  top: 124px;
  left: 170px;
}
.exer5 {
  position: relative;
  top: 124px;
  left: 350px;
}
.exer6 {
  position: relative;
  top: 242px;
  left: -230px;
}
.exer7 {
  position: relative;
  top: 242px;
  left: -70px;
}
.exer8 {
  position: relative;
  top: 242px;
  left:60px;
}
.exer9 {
  position: relative;
  top: 242px;
  left: 175px;
}
.exer10 {
  position: relative;
  top: 242px;
  left: 350px;
}

.grey {
  color: #999;
}

input[type="text"]:disabled {
  color: #000;
}
.left_ {
  margin-left: 1.3em;
}
.left_x {
  margin-left: 1em;
}
span.red {
  color: #f00;
}
input[type="text"]:disabled {
  color: #006595;
  font-size: 17px;
}
input:focus {
  border-bottom-color: #83b4db;
  -webkit-box-shadow: 0 0 0 0 white, 0 2px 2px #83b4db;
  -moz-box-shadow: 0 0 0 0 white, 0 2px 2px #83b4db;
  box-shadow: 0 0 0 0 white, 0 2px 2px #83b4db;
  background: #faf0b7;
}

span.items {
  font-size: 18px;
  cursor: all-scroll;
  z-index: 1;
  line-height: 1.8em;
  color: #231f20;
}
span.blue {
  color: #006595;
  line-height: 1.8em;
}

textarea {
  padding: 10px;
}
textarea {
  display: block;
  box-sizing: padding-box;
  overflow: hidden;
  padding: 4px;
  width: 250px;
  font-size: 14px;
}
footer {
  left: 0;
  bottom: 0;
  height: 100px;
  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;
}

.grid-q2 {
  margin: 1em 2.5em;
  display: grid;
  grid-template-columns:1fr 8fr 1fr;
  /* border: 1px solid #ff9756; */
  color: #000;
  font-size: 16px;
  width: 510px;
}

.grid-q2 > * {
  border: 1px solid #63c29d;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
  background-color: #ffffff;
}

.grid-q2 > .ans {
  text-align: center;
}

.ans label {
  display: inline-block;
}

.grid-q2 > .d {
  background-color: #f0f1d8;
  color: #63c29d !important;
	  
}

.grid-q2 > .c,
.grid-q2 > .d { 
  font-family: "PFTransport-Regular";
  top: 0;
  color: #000;
  font-size: 17px;
  display: block;
 
  line-height: 1.8em;
	  
	
}

.grid-q2 > .c {
    text-align: left;
    padding-left: 15px;
    vertical-align: bottom;
   
    position: relative;
    padding-top: 9px;
}

.cstart {
  grid-column-start: 3;
}