*,
*:before,
*:after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  background-color: rgba(79, 107, 79, 0.217);
  padding: 0;
}

::-webkit-scrollbar {
  width: 0;
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    text-decoration: none;
    color: #fff;
    background-color: #238d2a;
    padding: 20px;
    border-radius: 50%;
    font-size: 40px;
    z-index: 999;
}

.back-to-top i {
    margin: auto;
    color: green;
}

.back-to-top:hover {
    background-color: #00d928;
}

.back-to-top:focus {
    outline: none;
}

header {
  position: relative;
  height:80vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #c6d9d3;
}
header .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
header .overlay h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  margin: 0;
  text-transform: uppercase;
  text-align: center;
  font-size: 9rem;
  text-shadow: 25px -15px rgba(25, 42, 46, 0.04);
  color: #142124;
  mix-blend-mode: overlay;
}
header .overlay h1 span {
  margin-top: -2em;
  padding-top: 0.5em;
  display: block;
  letter-spacing: 5px;
  font-size: 1.25rem;
}
header .parallax {
  position: relative;
  width: 100%;
  height: 100%;
}
header .parallax div {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-position: 0 50%;
  background-repeat: no-repeat;
  background-size: 100%;
}
header .parallax .one {
  background-image: url("https://raw.githubusercontent.com/joshuaward/codepen-images/master/mountains-1.svg");
  z-index: 4;
}
header .parallax .two {
  background-image: url("https://raw.githubusercontent.com/joshuaward/codepen-images/master/mountains-2.svg");
  z-index: 3;
}
header .parallax .three {
  background-image: url("https://raw.githubusercontent.com/joshuaward/codepen-images/master/mountains-3.svg");
  z-index: 2;
}
header .parallax .four {
  background-image: url("https://raw.githubusercontent.com/joshuaward/codepen-images/master/mountains-4.svg");
  z-index: 1;
}
header .parallax .five {
  background-image: url("https://raw.githubusercontent.com/joshuaward/codepen-images/master/mountains-5.svg");
  z-index: 0;
}

main {
  position: relative;
  margin-bottom: 15vh;
  padding: 2em 4em;
  min-height: 85vh;
  background-color: #e8f4f8;
  box-shadow: 0px 5px 10px rgba(0, 0, 0, 0.08);
}
main .container {
  font-size: 1rem;
  color: #192a2e;
}
main .container pre {
  padding: 1em;
  border-radius: 0.25em;
  background-color: rgba(25, 42, 46, 0.05);
}
main .container a {
  text-decoration: none;
  font-size: 2rem;
  font-weight: 500;
  border-bottom: 2px dashed;
  color: #192a2e;
}

footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: -1;
  display: flex;
  min-height: 15vh;
  justify-content: center;
  align-items: center;
  font-size: 1rem;
  background-color: #192a2e;
  color: #c6d9d3;
}
footer a {
  padding-bottom: 0.25em;
  text-decoration: none;
  border-bottom: 1px dashed #c6d9d3;
  color: #c6d9d3;
}
@media(max-width:800px) {
  
header {
  height:50vh;
}
}
.home-btn {
  position: fixed;
  top: 20px;
  left: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 65px;
  height: 65px;
  background-color: #146819;
  color: #fff;
  font-size: 24px;
  border-radius: 50%;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
  z-index: 999;
}

.home-btn:hover {
  background-color: #555;
}

.home-btn:focus {
  outline: none;
}