stylesheet css.css

* {
  box-sizing: border-box;
}


html, body,
ul, ol, li,
h1, h2, h3, h4, h5, h6, p, div {
  margin: 0;
  padding: 0;
}


body {
  font-family: "Lucida Grande"; background-size: cover;
}


a {
  text-decoration: none;
}


.clear {
  clear: left;
}


.container {
  max-width: 100%
  padding: 0 25px;
  margin: 0 auto;
}
.topnav {
  background-color: #333;
  overflow: hidden;
}
.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 10px 20px;
  text-decoration: none;
  font-size: 17px;
}
.topnav a:hover {
  background-color: #ddd;
  color: black;
}
.topnav a.active {
  background-color: #4CAF50;
  color: white;
}

body {
  margin: 0;
  font-family: "Lucida Grande";
}


a {
  text-decoration: none;
}


.container {
  width: 1170px;
  padding: 0 15px;
  margin: 0 auto;
}


.top-wrapper {
  padding: 180px 0 100px 0;

  background-size: cover;
  color: white;
  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-wrapper {
  margin: 20px 0;
}


.btn-wrapper p {
  margin: 10px 0;
}


.signup {
  background-color: #239b76;
}


.facebook {
  background-color: #3b5998;
  margin-right: 10px;
}


.twitter {
  background-color: #55acee;
}


.btn {
  padding: 12px 24px;
  color: white;
  display: inline-block;
  opacity: 0.8;
  border-radius: 4px;
}


.btn:hover {
  opacity: 1;
}

.fa {
  margin-right: 5px;
}

.top-wrapper {
  padding: 180px 0 500px 0;
 background-size: cover; color: black;
  text-align: center;
}


.top-wrapper h2 {
  opacity: 0.7;
  font-size: 45px;
  letter-spacing: 5px;
  margin-bottom: 10px;
}

.top-wrapper h3{
  opacity: 0.7;
  font-size: 45px;
  letter-spacing: 5px;
  margin-bottom: 10px;
}


.top-wrapper p {
  opacity: 0.7;
  margin-bottom: 3px;
}


.btn-wrapper {
  text-align: center;
  margin: 20px 0;
}


.btn-wrapper p {
  margin: 10px 0;
}


header {
  height: 65px;
  width: 100%;
  background-color: rgba(34, 49, 52, 0.9);
  position :fixed;
  top: 0;
  z-index: 10;
}


.logo {
  width: 124px;
  margin-top: 5px;
}

.header-right {
  float: right;
  margin-right: -25px;
}


.header-right a {
  line-height: 65px;
  padding: 0 25px;
  color: white;
  display: block;
  float: left;
  transition: all 0.5s;
}


.header-right a:hover {
  background-color: rgba(255, 255, 255, 0.3);
}



.lesson-wrapper {
  padding-bottom: 80px;
  padding-left: 5%;
  padding-right: 5%;
  text-align: center;
}


.heading {
  padding-top: 80px;
  padding-bottom: 50px;
  color: #5f5d60;
}


.heading h2 {
  font-weight: normal;
}


.lesson {
  float: left;
  width: 25%;
}


.lesson-icon {
  position: relative;
}


.lesson-icon p {
  position: absolute;
  top: 44%;
  width: 100%;
  color: white;
}


.text-contents {
  width: 80%;
  display: inline-block;
  margin-top: 15px;
  font-size: 15px;
  color: #b3aeb5;
}


.heading h3 {
  font-weight: normal;
}


.message-wrapper {
  border-bottom: 1px solid #eee;
  padding-bottom: 80px;
  text-align: center;
}


.message {
  padding: 15px 40px;
  background-color: #5dca88;
  cursor: pointer;
  box-shadow: 0 7px #1a7940;
}


.message:active {
  position: relative;
  top: 7px;
  box-shadow: none;
}


footer img {
  width: 125px; margin-top: 5px; 
}


footer p {
  color: #b3aeb5;
  font-size: 12px;}



footer {
  padding-top: 30px;
  padding-bottom: 20px;
}
.menu-icon {
  color: white;
  float: right;
  font-size: 25px;
  padding: 21px 0;
  display: none;
}


* {box-sizing: border-box}
body {font-family: "Lato", sans-serif;}
.tab {
  float: left;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
  width: 30%;
  height: 300px;
}
.tab button {
  display: block;
  background-color: inherit;
  color: black;
  padding: 22px 16px;
  width: 100%;
  border: none;
  outline: none;
  text-align: left;
  cursor: pointer;
  transition: 0.3s;
  font-size: 17px;
}
.tab button:hover {
  background-color: #ddd;
}
.tab button.active {
  background-color: #ccc;
}
.tabcontent {
  float: left;
  padding: 0px 12px;
  border: 1px solid #ccc;
  width: 70%;
  border-left: none;
  height: 300px;
}