.svg-footer {
  position: absolute;
  bottom: 0;
  z-index: -1;
  filter: brightness(0) saturate(100%) invert(7%) sepia(11%) saturate(82%)
    hue-rotate(321deg) brightness(87%) contrast(86%);
}

.difficulty {
  padding: 5px;
  border-radius: 3px;
  width: 22%;
  background: rgb(249, 190, 32);
  background: linear-gradient(
    90deg,
    rgba(249, 190, 32, 1) 5%,
    rgba(240, 159, 81, 1) 96%
  );
  font-weight: bold;
}

.blob-left {
  position: absolute;
  float: none;
  z-index: -1;
  left: -20.8%;
  right: 69.96%;
  top: 7.2%;
  bottom: 54.69%;
  width: 30%;
  transform: rotate(0.07deg);
}

.blob-about {
  position: absolute;
  float: none;
  z-index: -1;
  left: 60.8%;

  top: 7.2%;
  bottom: 54.69%;
  width: 30%;
  transform: rotate(0.07deg);
}

.blob-right {
  position: absolute;
  float: none;
  z-index: -1;
  width: 30%;
  left: 70%;
  top: 40%;
  transform: rotate(30deg);
}

.btn.btn-border-4::after,
.btn.btn-border-4::before {
  position: absolute;
  content: "";
  width: 0;
  height: 0;
  transition: 0.5s;
}

.btn {
  position: relative;
  display: inline-block;
  margin: 15px;
  padding: 12px 27px;
  text-align: center;
  font-size: 16px;
  letter-spacing: 1px;
  text-decoration: none;
  cursor: pointer;
  transition: ease-out 0.5s;
  -webkit-transition: ease-out 0.5s;
  -moz-transition: ease-out 0.5s;
}
.btn.btn-border-4::after,
.btn.btn-border-4::before {
  position: absolute;
  content: "";
  width: 0;
  height: 0;
  transition: 0.5s;
}

.btn.btn-border-4::after {
  top: -9px;
  left: -9px;
  border-top: 3px solid transparent;
  border-left: 3px solid transparent;
}

.btn.btn-border-4::before {
  bottom: -9px;
  right: -9px;
  border-bottom: 3px solid transparent;
  border-right: 3px solid transparent;
}

.btn.btn-border-4:hover {
  color: #ffffff;
}

.btn.btn-border-4:hover::after,
.btn.btn-border-4:hover::before {
  border-radius: 4px;
  width: calc(100% + 1px);
  height: calc(100% + 1px);
  border-color: #ffffff;
}
.btn:focus {
  border-radius: 4px;
  width: calc(30% + 1px);
}