body {
  margin: 0;
  font-family: "Lucida Grande";
}
a {
  text-decoration: none;
}
.container {
  width: 1170px;
  padding-left: 15px;
  padding-right: 15px;
  margin-left: auto;
  margin-right: auto;
}

.top-wrapper {
  padding-top: 180px;
  padding-bottom: 100px;
  color: white;
  background-image: url("top_en.png");
  background-size: cover;
  text-align: center;
}
.top-wrapper h1 {
  opacity: 0.7;
  font-size: 45px;
  letter-spacing: 5px;
  margin-bottom: 10px;
}
.top-wrapper p {
  opacity: 0.7;
  margin-bottom: 3px;
}
.btn {
  padding: 12px 24px;
  color: white;
  display: inline-block;
  opacity: 0.8;
}
.signup {
  background-color: #239b76;
}
.Facebook {
  background-color: #3b5998;
  margin-right: 10px;
}
.Twitter {
  background-color: #55acee;
  margin-right: 10px;
}

.btn-wrapper {
  margin-top: 20px;
  margin-bottom: 20px;
  margin: 0 auto;
}
.lesson-wrapper {
  height: 500px;
  padding-bottom: 80px;
  background-color: #f7f7f7;
  text-align: center;
}
.headding {
  padding-top: 60px;
  padding-bottom: 30px;
  color: #5f5d60;
}
.lesson {
  float: left;
  width: 25%;
}
.lesson-icon p {
  position: absolute;
  top: 70px;
  width: 100%;
  color: white;
}
.lesson {
  position: relative;
}
.lesson .text-content {
  width: 80%;
  font-size: 15px;
  display: inline-block;
  margin-top: 20px;
  color: #b3aeb5;
}
.message {
  background-color: #5dca88;
  padding-top: 15px;
  padding-bottom: 15px;
  padding-left: 40px;
  padding-right: 40px;
  cursor: pointer;
  box-shadow: 0px 10px #145844;
  border-radius: 10px;
}
.btn:hover {
  opacity: 1;
}
.message-wrapper {
  text-align: center;
  border-bottom: 1px solid #eee;
  padding-bottom: 80px;
}
.message:active {
  position: relative;
  top: 7px;
  box-shadow: none;
}
footer{
  font-size: 12px;
  padding-top: 30px;
}
header{
  height: 65px;
  width: 100px;
  background-color: #223134e6;
  position: fixed;
  top: 0;
  z-index: 10;
}
.logo{
  width: 124px;
  margin-top: 20px;
}
.header-left{
  float: left;
}
.header-right{
  float: right;
  background-color: rgba(255,255,255,0.3);
  transition: all 0.5s;
}
.header-right:hover{
  background-color: rgba(255,255,255,0.5);
}
.header-right a{
  line-height: 65px;
  padding-left: 25px;
  padding-right: 25px;
  color: white;
  display: block;
}