@import url('https://fonts.googleapis.com/css2?family=Shadows+Into+Light&display=swap');
*{
  margin:0;
  padding:0;
  box-sizing: border-box;
}
.container {
  padding-left: 15px;
  padding-right: 15px;
  margin-left: auto;
  margin-right: auto;
  margin-top: 10px;
}
/* Small */
@media (min-width: 768px) {
  .container {
    width: 750px;
  }
}
/* Medium */
@media (min-width: 992px) {
  .container {
    width: 970px;
  }
}
/* Large */
@media (min-width: 1200px) {
  .container {
    width: 1170px;
  }
}
.hero{
  width:100%;
  height: 100vh;
  background-image: url("images/background.png");
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}
.logo{
  width: 100px;
  cursor: pointer;
}
.navbar{
  width: 85%;
  height: 15%;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.hero .navbar div{
  display: flex;
  align-items: center;
  cursor: pointer;
}
.hero .navbar div img{
  width: 60px;
  margin-left: 15px;
}
.hero .navbar div span{
  color: #fbfcfd;
  font-size: 25px;
  font-weight: 600;
  margin-left: -30px;
  font-family: 'Shadows Into Light', cursive;
}
button{
  color: #fbfcfd;
  padding: 10px 25px;
  font-size: 16px;
  background: transparent;
  border: 3px double #fff;
  border-radius: 20px;
  outline: none;
  transition: .3s;
  cursor: pointer;
}
button:hover{
  background-color:rgba(255, 255, 255, .5)
}
.content{
  color: #fbfcfd;
  position: absolute;
  top:50%;
  left:8%;
  transform: translateY(-50%);
  z-index: 2;
}
h1{
  font-size: 80px;
  margin: 10px 0 30px;
  line-height: 80px;
}
/*@media*/
@media(max-width:767px){
  h1{
    font-size: 34px;
    line-height: 40px;
  }
}
.side-bar{
  width: 50px;
  height: 100vh;
  background: linear-gradient(#00545d, #000729);
  position: absolute;
  right: 0;
  top: 0;
  z-index: 9;
}
.menu{
  display: block;
  width:25px;
  margin: 40px auto 0;
  cursor: pointer;
  transition: .3s;
}
.menu:hover{
  border-radius: 50%;
  background-color:rgba(255, 255, 255, .3);
}
.social-links img, .useful-links img{
  width:35px;
  margin: 5px auto;
  transition: .3s;
  cursor: pointer;
}
.social-links img:hover, .useful-links img:hover{
  background-color:rgba(255, 255, 255, .3);
  border-radius: 50%;
}
.social-links{
  width: 50px;
  text-align: center;
  position: absolute;
  top:50%;
  transform: translateY(-50%);
}
.useful-links{
  width: 50px;
  text-align: center;
  position: absolute;
  bottom: 30px;
}
.bubbles{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 1;
}
.bubbles img{
  width: 50px;
  opacity: 0;
  animation: bubble 7s linear infinite;
}
.bubbles img:nth-child(1){
  animation-delay: 2s;
}
.bubbles img:nth-child(2){
  animation-delay: 1s;
  width: 25px;
}
.bubbles img:nth-child(3){
  animation-delay: 3s;
}
.bubbles img:nth-child(4){
  animation-delay: 4.5s;
  width: 40px
}
.bubbles img:nth-child(5){
  animation-delay: 3s;
}
.bubbles img:nth-child(6){
  animation-delay: 6s;
  width: 30px;
}
.bubbles img:nth-child(7){
  animation-delay: 7s;
}
.bubbles img:nth-child(8){
  animation-delay: 10s;
  width: 25px;
}
.bubbles img:nth-child(9){
  animation-delay: 1s;
  width: 80px;
}
.bubbles img:nth-child(10){
  animation-delay: 5s;
  width: 20px
}
@keyframes bubble{
  0%{
    transform: translateY(0);
    opacity: 0;
  }
  50%{
    opacity: 1;
  }
  70%{
    opacity: 1;
  }
  100%{
    transform: translateY(-80vh);
    opacity: 0;
  }
}