.but-1 {
  box-shadow: inset 0 0 0 4px #58afd1;
  color: #58afd1;
  transition: color 0.25s 0.0833333333s;
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1.5;
  font: 700 1.2rem 'Roboto Slab', sans-serif;
  padding: 1em 2em;
  letter-spacing: 0.05rem;
}
.but-1:focus {
  outline: 2px dotted #55d7dc;
}
.but-1::before, .but-1::after {
  border: 0 solid transparent;
  box-sizing: border-box;
  content: '';
  pointer-events: none;
  position: absolute;
  width: 0;
  height: 0;
  bottom: 0;
  right: 0;
}
.but-1::before {
  border-bottom-width: 4px;
  border-left-width: 4px;
}
.but-1::after {
  border-top-width: 4px;
  border-right-width: 4px;
}
.but-1:hover {
  color: #ffe593;
}
.but-1:hover::before, .but-1:hover::after {
  border-color: #ffe593;
  transition: border-color 0s, width 0.25s, height 0.25s;
  width: 100%;
  height: 100%;
}
.but-1:hover::before {
  transition-delay: 0s, 0s, 0.25s;
}
.but-1:hover::after {
  transition-delay: 0s, 0.25s, 0s;
}


.but-2{
  box-sizing: border-box;
  appearance: none;
  background-color: transparent;
  border: 2px solid #e74c3c;
  border-radius: 0.6em;
  color: #e74c3c;
  cursor: pointer;
  display: flex;
  align-self: center;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  margin: 20px;
  padding: 1.2em 2.8em;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}
.but-2:hover, .but:focus {
  color: #fff;
  outline: 0;
}
.but-2 {
  transition: box-shadow 300ms ease-in-out, color 300ms ease-in-out;
}
.but-2:hover {
  box-shadow: 0 0 40px 40px #e74c3c inset;
}

.but-3{
  box-sizing: border-box;
  appearance: none;
  background-color: transparent;
  border: 2px solid #e74c3c;
  border-radius: 0.6em;
  color: #e74c3c;
  cursor: pointer;
  display: flex;
  align-self: center;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  margin: 20px;
  padding: 1.2em 2.8em;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}
.but-3:hover, .but:focus {
  color: #fff;
  outline: 0;
}

.but-3 {
  border-radius: 3em;
  border-color: #1abc9c;
  color: #fff;
  background-image: linear-gradient(to right, rgba(26, 188, 156, 0.6), rgba(26, 188, 156, 0.6) 5%, #1abc9c 5%, #1abc9c 10%, rgba(26, 188, 156, 0.6) 10%, rgba(26, 188, 156, 0.6) 15%, #1abc9c 15%, #1abc9c 20%, rgba(26, 188, 156, 0.6) 20%, rgba(26, 188, 156, 0.6) 25%, #1abc9c 25%, #1abc9c 30%, rgba(26, 188, 156, 0.6) 30%, rgba(26, 188, 156, 0.6) 35%, #1abc9c 35%, #1abc9c 40%, rgba(26, 188, 156, 0.6) 40%, rgba(26, 188, 156, 0.6) 45%, #1abc9c 45%, #1abc9c 50%, rgba(26, 188, 156, 0.6) 50%, rgba(26, 188, 156, 0.6) 55%, #1abc9c 55%, #1abc9c 60%, rgba(26, 188, 156, 0.6) 60%, rgba(26, 188, 156, 0.6) 65%, #1abc9c 65%, #1abc9c 70%, rgba(26, 188, 156, 0.6) 70%, rgba(26, 188, 156, 0.6) 75%, #1abc9c 75%, #1abc9c 80%, rgba(26, 188, 156, 0.6) 80%, rgba(26, 188, 156, 0.6) 85%, #1abc9c 85%, #1abc9c 90%, rgba(26, 188, 156, 0.6) 90%, rgba(26, 188, 156, 0.6) 95%, #1abc9c 95%, #1abc9c 100%);
  background-position: 0 0;
  background-size: 100%;
  transition: background 300ms ease-in-out;
}
.but-3:hover {
  background-position: 100px;
}


.but-4{
  box-sizing: border-box;
  appearance: none;
  background-color: transparent;
  border: 2px solid #e74c3c;
  border-radius: 0.6em;
  color: #e74c3c;
  cursor: pointer;
  display: flex;
  align-self: center;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  margin: 20px;
  padding: 1.2em 2.8em;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}
.but-4:hover, .but:focus {
  color: #fff;
  outline: 0;
}
.but-4 {
  border-color: #3498db;
  color: #fff;
  box-shadow: 0 0 40px 40px #3498db inset, 0 0 0 0 #3498db;
  transition: all 150ms ease-in-out;
}
.but-4:hover {
  box-shadow: 0 0 10px 0 #3498db inset, 0 0 10px 4px #3498db;
  color: #333;
}

.but-5{
  box-sizing: border-box;
  appearance: none;
  background-color: transparent;
  border: 2px solid #e74c3c;
  border-radius: 0.6em;
  color: #e74c3c;
  cursor: pointer;
  display: flex;
  align-self: center;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1;
  margin: 20px;
  padding: 1.2em 2.8em;
  text-decoration: none;
  text-align: center;
  text-transform: uppercase;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
}
.but-5:hover, .but:focus {
  color: #333;
  outline: 0;
  transition: all 0.23 ease-in-out;
}
.but-5 {
  border-color: #f1c40f;
  color: #333;
  background-image: linear-gradient(45deg, #f1c40f 50%, transparent 50%);
  background-position: 100%;
  background-size: 400%;
  transition: background 300ms ease-in-out;
  transition: all 0.23 ease-in-out;
}
.but-5:hover {
  background-position: 0;

}