* {
  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: 50px;
}
header {
  display: block;
  background-image: url(../../images/ebook-banner/unit6.png);
  background-repeat: no-repeat;
  margin: 0 auto;
  width: 850px;
  height: 144px;

  position: relative;
}
.lecon {
  width: 87%;
  display: inline-block;
  text-align: left;
  height: 85px;
}

.container {
  width: 900px;
  display: block;
  text-align: center;
  background: #fff;
  margin: 0 auto;
}

.small-grid .pencil {
  background-image: url(../../images/pencil.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100%;
  height: 45px;
  width: 30px;
  margin: 10px 0 0 5px;
}
.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: 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;

  color: #ffff;
  font-size: 23px;
}
.small-grid,
.item-grid {
  width: 80%;
  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 -----------------------*/

section {
  width: 900px;
  margin: 0 auto;
  background: #fff;
}
.prosfonisi > p {
  line-height: 1.3em;
  color: #000;
  font-size: 19px;
  font-weight: normal;
  font-family: "PFCentroSlabPro-Medium";
  text-align: left;
}

/*-------------------title--------------------------*/
.column {
  padding: 0;
  display: inline-block;
  vertical-align: top;
  margin: 1% auto;
  width: 23%;
  text-align: center;
}

.green_title {
  display: block;
  float: left;
  font-family: "PFCentroSlabPro-Medium";
  font-size: 22px;
  font-weight: bold;

  color: #fff;
  border-radius: 6px;
  margin-left: 60px;
  padding: 5px;
  padding-left: 15px;
  padding-right: 15px;
}

div.image {
  background-image: url(../../images/exercise-images/unit2_exer1.PNG);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100%;
  width: 751px;
  height: 289px;
  margin: auto;
}

.drag-grid {
  font-family: "PFTransport-Regular";
  display: block;
  text-align: center;
  height: 100px;
  margin: 10px auto 0 auto;
  padding: 0;

  width: 80%;
}
.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;
  border: 2px dotted #fff;
  background: #d1e4eb;
}
.drag-grid li {
  /* background-color: #6FC696; */

  padding: 3px;
  height: auto;
  font-size: 16px;
  color: #000;
}

.greyspan {
  width: 100px;
  display: inline-block;
  color: #999;
  text-align: right;
}

label {
  font-family: "PFTransport-Regular";
  top: 0;
  color: #000;
  font-size: 17px;
  display: inline-block;

  padding: 1px;
  text-align: center;
  line-height: 1.5em;
}

.box1 {
  top: 90px;
  position: relative;
  left: -20px;
}
.box2 {
  top: 140px;
  position: relative;
  left: -52px;
}
.box3 {
  top: 90px;
  position: relative;
  left: -80px;
}
.box4 {
  top: 125px;
  position: relative;
  left: -110px;
}
.box5 {
  top: 0px;
  position: relative;
  left: 285px;
}

.box6 {
  top: 156px;
  position: relative;
  left: 40px;
}

span.ans {
  width: 165px;
  height: 20px;
  display: inline-block;
}

span.colored {
  color: #fcb034;
  display: inline-block;
  width: 20px;
  height: -40px;
  font-family: "PFTransport-Regular";
}

.p_big {
  display: inline-block;
  position: relative;
  margin-left: 30px;
  width: 725px;
  border: 0px dashed blue;
}

.parent {
  display: block;
  position: relative;
  float: left;
  width: 230px;
  border: 0px dashed blue;
}

.greyspan {
  width: 100px;
  display: inline-block;
  color: #999;
  text-align: right;
}
.input2 {
  width: 100px;
  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;
}

.input3 {
  width: 20px;
  text-align: left;
  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: 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;
}

.exer1 {
  position: relative;
  top: 65px;
  left: 267px;
}
.exer2 {
  position: relative;
  top: 73px;
  left: 365px;
}
.exer3 {
  position: relative;
  top: 66px;
  left: 365px;
}
.exer4 {
  position: relative;
  top: 92px;
  left: 137px;
}
.exer5 {
  position: relative;
  top: 143px;
  left: 264px;
}
.exer6 {
  position: relative;
  top: 83px;
  left: 138px;
}
.exer7 {
  position: relative;
  top: 200px;
  left: 111px;
}
.exer8 {
  position: relative;
  top: 170px;
  left: 150px;
}

.grey {
  color: #999;
}

input[type="text"]:disabled {
  color: #000;
}
.left_ {
  margin-left: 1.5em;
}
.left_x {
  margin-left: 1em;
}
span.red {
  color: #f00;
}
input[type="text"]:disabled {
  color: #006595;
  font-size: 17px;
}
.sample {
  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;
}
.clear {
  display: block;
  clear: both;
  width: 100%;
}
footer {
  left: 0;
  bottom: 0;

  width: 100%;
  overflow: hidden;
}