@import url('https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap');
*
{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}
section 
{
  position: relative;
  width: 100%;
  min-height: 120vh;
  padding: 0 100px;
  display: flex;
  align-items: center;
  background: #21283a;
  overflow-x: hidden;
}
section::before 
{
  content: '';
  position: absolute;
  top: 50%;
  right: 100px;
  transform: translateY(-50%);
  width: 500px;
  height: 500px;
  background: #1de5ff;
  border-radius: 50%;
  box-shadow: 0 0 20px #1de5ff,
  0 0 50px #1de5ff,
  0 0 150px #1de5ff;
  transition: 1s;
}
section.active::before 
{
  background: #21283a;
  box-shadow: 0 0 0 1200px #141821;
}
header 
{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px 100px;
  background-color: #070505;
}
header .logo 
{
  font-size: 1em;
  color: #fff;
  letter-spacing: 1px;
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  transition: 0.5s;
  transform-origin: left;
}


header .logo span 
{
  color: gold;
  border-bottom: 4px solid #1de5ff;
}


header .toggle 
{
  position: relative;
  width: 30px;
  height: 30px;
  background: url(menu.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 30px;
  cursor: pointer;
}
header .toggle.active
{
  background: url(close.png);
  background-repeat: no-repeat;
  background-position: center;
  background-size: 30px;
}
.girl
{
  position: absolute;
  bottom: 15%;
  right: 80px;
  width: 550px;
}
.content 
{
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: 0.5s;
  transform-origin: left;
  padding-top: 100px;
}
.content .contentBx 
{
  position: relative;
  max-width: 600px;
  z-index: 100;
}
.content .contentBx h4 
{
  font-weight: 400;
  color: #1de5ff;
  font-size: 1.5em;
  letter-spacing: 2px;
  margin-bottom: 10px;
}
.content .contentBx h2 
{
  font-size: 4em;
  line-height: 1em;
  color: #fff;
}
.content .contentBx h3
{
  font-weight: 300;
  color: #fff;
  font-size: 2em;
  line-height: 1.5em;
}
.content .contentBx p 
{
  font-size: 1em;
  color: #fff;
  margin: 10px 0 20px;
}
.content .contentBx a 
{
  display: inline-block;
  color: #fff;
  padding: 10px 20px;
  margin-right: 20px;
  font-weight: 500;
  text-transform: uppercase;
  text-decoration: none;
  border: 2px solid #1de5ff;
  letter-spacing: 2px;
  transition: 0.5s;
}
.content .contentBx a:last-child 
{
  background: #1de5ff;
  color: #111;
}
.content .contentBx a:hover 
{
  box-shadow: 0 0 15px #1de5ff,
  0 0 40px #1de5ff;
}

.tech li{
  color: grey;
}
.sci
{
  position: absolute;
  bottom: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  z-index: 2;
  transition: 0.5s;
  transform-origin: left;
}
.sci li 
{
  list-style: none;
  width: 50px;
  height: 50px;
}
.sci li a
{
  display: inline-block;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 2px solid #fff;
  border-radius: 50%;
}
.sci li:hover a
{
  background: #fff;
}
.sci li a img 
{
  filter: invert(1);
  transform: scale(0.6);
}
.sci li:hover a img 
{
  filter: invert(0);
}

section.active .logo ,
section.active .content,
section.active  .sci
{
  transform: scale(0);
}
.menu 
{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
  z-index: 2;
  padding-left: 100px;
  opacity: 0;
  visibility: hidden;
  transition: 0.5s;
  background-color: #070505;
}
section.active .menu  
{
  opacity: 1;
  visibility: visible;
  transition-delay: 0.5s;
}
.menu li 
{
  list-style: none;
}
.menu li a 
{
  color: #fff;
  text-decoration: none;
  font-size: 1.5em;
  padding: 5px 10px;
  margin: 5px 0;
  display: inline-block;
  transition: 0.25s;
  background-color: #070505;
}
.menu li:hover a
{
  letter-spacing: 6px;
  background: #fff;
  color: #161a23;
}

b{
  color: gold;
}

/* now, make it responsive */
@media (max-width: 991px)
{
  section
  {
    padding: 60px;
    top: 70px;
  }
  header 
  {
    padding: 20px 40px;
  }
  section::before
  {
    opacity: 0;
  }
  .girl
  {
    right: -100px;
    opacity: 0.3;
  }
  .content .contentBx a 
  {
    margin-bottom: 10px;
    padding: 6px 12px;
  }
  .menu 
  {
    padding-left: 0;
    align-items: center;
  }
  .content .contentBx h2
  {
    font-size: 2.2em;
  }
  .content .contentBx h3 
  {
    font-size: 1.5em;
  }


}

@media (min-width: 768px)
{
  footer{
    position: relative;
    top: 50px;
  }
}

@media (max-width: 768px)
{
  footer{
    position: relative;
    top: 50px;
  }
}

@media (max-width: 1024px)
{
  .girl{
    display: none;
  }

  section::before{
    display: none;
  }
}