stylesheet.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: white;
}

header {
  font-size: 15px;
  font-family: 'Georama', sans-serif;
  width: 100%;
  height: 65px;
  background-image: url(blue_background.jpg);
  background-size: 100%;
  position: fixed;
  top: 0;
  z-index: 10;
  background-color: rgba(127, 218, 235, 0.9);
}

.logo {
  font-size: 20px;
  color: azure;
  margin-top : 20px;
  float: left;
  width: 124px;
}

.header-left {
  float: left;
}

.header-right {
  float: right;
  font-size: 15px;
  margin-right: -25px;
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande';
}

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

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

.menu-icon {
  color:white;
  float: right;
  font-size: 25px;
  padding: 21px 0;
  /* Gantikan property display ke none */
  display: none;
}

li {
  list-style-type: none;
  display: inline-block;
  padding: 20px 40px;
}
/*awal bagian top*/
.top-wrapper {
padding: 180px 0 100px 0;
background-image: url(https://img.freepik.com/free-vector/back-school-new-normal-lifestyle-concept-happy-kids-wearing-face-mask-social-distancing-protect_83111-1086.jpg?size=626&ext=jpg);
background-size: 100%;
text-align: center;
opacity: 0.8;
}

.top-wrapper h2 {
text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
margin-bottom: 3px;
font-size: 40px;
font-style: georgia;
font-weight: bold;
color: black;
}

.btn {
padding: 12px 24px;
color: white;
display: inline-block;
opacity: 0.8;
border-radius: 2px;
}

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

.btn-wrapper p {
text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
margin-bottom: 3px;
font-size: 20px;
font-style: georgia;
color: black;
}

.facebook {
background-color: #3b5998;
margin-right: 60px;
}

.twitter {
background-color: #55acee;
margin-left: 60px;
}

.btn:hover {
opacity: 1;
}

.fa {
margin-right: 5px;
}
/*akhir bagian Top*/


/* awal bagian lesson */
.lesson-wrapper {
padding-bottom: 80px;
padding-left: 5%;
padding-right: 5%;
background-color: #35c0eb;
text-align: center;
}

.heading {
padding-top: 60px;
padding-bottom: 30px;
color: white;
}

.heading h2 {
font-weight: bold;
font-family: Georgia;
font-size: 40px;
}

.lesson {
  float: left;
  width: 30%;
  padding-bottom: 35px;
  padding-left: 20px;
}

.lesson-wrapper .container {
  margin: 0 auto;
  padding: 0 15px;
  width: 100%;
}

.lesson p {
  color: white;
  font-family: Georgia;
  font-size: 18px;
}

img {
  width: 250px;
  height: 250px;
}

.clear {
  clear: left;
}
/* akhir bagian lesson */
/* awal bagian message*/
.message-wrapper{
  font-family: 'Georgia' ;
  padding-top:100px;
  padding-bottom :100px;
  color :black;
}

.container{
max-width: 1170px;
width: 100%;
padding : 0 auto;
margin : 0 auto;
text-align: center;
}

.btn-wrapper{
text-align: center;
margin: 50px 0;
}

.syringe{
background-color: #0051ff; 
}

.btn{
padding: 12px 24px;
color: white;
display: inline-block;
opacity: 0.8;
border-radius: 6px;
text-decoration: none;
text-align: center;
margin : 0 auto;
box-shadow: 0 7px #000e2c;
}

.btn:hover{
opacity: 1;
}

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

.kotak{
    width: 130px;
    height: 80px;
    background-color: red;
    animation-name: example;
    animation-duration: 4s;
    text-align: center;
    margin: 0 auto;
    animation-iteration-count: infinite;
    line-height: 80px;
    border-radius: 6px;
  }
  
  @keyframes example {
    from {background-color: red;}
    to {background-color: yellow;}
  }

/*akhir bagian message*/

footer {
  background-color: #eef8ff;
  height: 100px;
  width: 100%;
  padding-top: 30px;
}

.footer-left {
  float: left;
}

.logo-footer {
  font-family: 'Georama', sans-serif;
  font-size: 20px;
  color: #4169E1;
  margin : 20px 50px;
}

.footer-left h3 {
  font-size: 12px;
  font-family: 'Poppins', sans-serif;
  color:#b3aeb5;
}

.footer-right {
  float: right;
  padding-right: 10px;
}

.icon {
padding-top: 20px;
list-style: none;
font-size: 10px;
}

.fab {
float: left;
padding-right: 5px;
}