html {
  overflow: hidden;
  height: 100%;
  background: #191919;
  width: 100%;
}

#canvas {
  background: url("https://res.cloudinary.com/dc4stsmlc/image/upload/v1570612478/Codepen/space_sanxvu.jpg")
    no-repeat;
  width: 100%;
  height: 100%;
  background-size: cover;
}

#canvas.playing {
  cursor: url("https://res.cloudinary.com/dc4stsmlc/image/upload/v1570612589/Codepen/aim_red_j9cyuq.png")
      17.5 17.5,
    auto !important;
}

.full-screen {
  position: fixed;
  width: 35px;
  height: 35px;
  background: url(https://res.cloudinary.com/dc4stsmlc/image/upload/v1570612477/Codepen/full-screen_szgnei.png)
    no-repeat;
  z-index: 10;
  display: block;
  right: 10px;
  bottom: 10px;
}
a {
  color: white;
}
.container {
  max-width: 1170px;
  margin: auto;
}
.row {
  display: flex;
  flex-wrap: wrap;
}
ul {
  list-style: none;
}
.footer {
  background-color: #24262b;
  padding: 70px 0;
  position: relative;
  margin-top: 500px;
}
.footer-col {
  width: 25%;
  padding: 0 15px;
}
.footer-col h4 {
  font-size: 18px;
  color: #ffffff;
  text-transform: capitalize;
  margin-bottom: 35px;
  font-weight: 500;
  position: relative;
}
.footer-col h4::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  background-color: #007dd1;
  height: 2px;
  box-sizing: border-box;
  width: 50px;
}
.footer-col ul li:not(:last-child) {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 16px;
  text-transform: capitalize;
  color: #ffffff;
  text-decoration: none;
  font-weight: 300;
  color: #bbbbbb;
  display: block;
  transition: all 0.3s ease;
}
.footer-col ul li a:hover {
  color: #ffffff;
  padding-left: 8px;
}
.footer-col .social-links a {
  display: inline-block;
  height: 40px;
  width: 40px;
  background-color: rgba(255, 255, 255, 0.2);
  margin: 0 10px 10px 0;
  text-align: center;
  line-height: 40px;
  border-radius: 50%;
  color: #ffffff;
  transition: all 0.5s ease;
}
.footer-col .social-links a:hover {
  color: #24262b;
  background-color: #ffffff;
}

/*responsive*/
@media (max-width: 767px) {
  .footer-col {
    width: 50%;
    margin-bottom: 30px;
  }
}
@media (max-width: 574px) {
  .footer-col {
    width: 100%;
  }
}
.back {
  color: white;
  text-decoration: none;
  margin-bottom: 700px;
}
nav {
  background: #0082e6;
  height: 80px;
  width: 100%;
}
label.logo {
  color: white;
  font-size: 35px;
  line-height: 80px;
  padding: 0 100px;
  font-weight: bold;
}
nav ul {
  float: right;
  margin-right: 20px;
}
nav ul li {
  display: inline-block;
  line-height: 80px;
  margin: 0 5px;
}
nav ul li a {
  color: white;
  font-size: 17px;
  border-radius: 3px;
  text-transform: uppercase;
  padding: 7px 13px;
}
a.active,
a:hover {
  background: #1b9bff;
  transition: 0.5s;
}
.checkbtn {
  font-size: 30px;
  color: white;
  float: right;
  line-height: 80px;
  margin-right: 40px;
  cursor: pointer;
  display: none;
}
#check {
  display: none;
}
@media (max-width: 952px) {
  label.logo {
    font-size: 30px;
    padding-left: 50px;
  }
  nav ul li a {
    font-size: 16px;
  }
}
@media (max-width: 858px) {
  .checkbtn {
    display: block;
  }
  ul {
    position: fixed;
    width: 100%;
    height: 100vh;
    background: #2c3e50;
    top: 80px;
    left: -100%;
    text-align: center;
    transition: all 0.5s;
  }
  nav ul li {
    display: block;
    margin: 50px 0;
    line-height: 30px;
  }
  nav ul li a {
    font-size: 20px;
  }
  a:hover,
  a.active {
    background: none;
    color: #0082e6;
  }
  #check:checked ~ ul {
    left: 0;
  }
}
.column {
  float: left;
  width: 25%;
  padding: 0 10px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  grid-column-gap: 1.5rem;
  grid-row-gap: 2rem;
}

/* Remove extra left and right margins, due to padding */
.ro {
  margin: 0 -5px;
}

/* Clear floats after the columns */
.ro:after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive columns */
@media screen and (max-width: 600px) {
  .column {
    width: 100%;
    display: block;
    margin-bottom: 20px;
    max-height: 100px;
  }
}