CSS designed buttons with animated hover effects

Inspiration for new ways to make interactive buttons using linear-gradients, box-shadows, and pseudo classes. Nice unique style and good use of css. This demo has six different CSS designed buttons with animated hover effects. Demo and download avilable.

HTML Snippet

<h1>Who doesn't like fun buttons?</h1>
<button class="btn first">Button 1</button>
<button class="btn second">Button 2</button>
<button class="btn third">Button 3</button>
<button class="btn fourth">Button 4</button>
<button class="btn fifth">Button 5</button>
<button class="btn sixth">Button 6</button>
<p>Inspiration for new ways to make interactive buttons using linear-gradients, box-shadows, and pseudo classes!</p>

CSS Code

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #2c3e50;
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
}

body {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-items: center;
  align-content: center;
}

h1 {
  color: #f1c40f;
  font-size: 4rem;
  text-transform: uppercase;
  display: block;
  width: 100%;
  text-align: center;
}
@media screen and (max-width: 600px) {
  h1 {
    font-size: 3rem;
  }
}

p {
  color: #f1c40f;
  font-size: 1.2rem;
  width: 100%;
  padding: 20px;
  text-align: center;
}

.btn {
  box-sizing: border-box;
  -webkit-appearance: none;
     -moz-appearance: none;
          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;
}
.btn:hover, .btn:focus {
  color: #fff;
  outline: 0;
}

.first {
  transition: box-shadow 300ms ease-in-out, color 300ms ease-in-out;
}
.first:hover {
  box-shadow: 0 0 40px 40px #e74c3c inset;
}

.second {
  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;
}
.second:hover {
  background-position: 100px;
}

.third {
  border-color: #3498db;
  color: #fff;
  box-shadow: 0 0 40px 40px #3498db inset, 0 0 0 0 #3498db;
  transition: all 150ms ease-in-out;
}
.third:hover {
  box-shadow: 0 0 10px 0 #3498db inset, 0 0 10px 4px #3498db;
}

.fourth {
  border-color: #f1c40f;
  color: #fff;
  background-image: linear-gradient(45deg, #f1c40f 50%, transparent 50%);
  background-position: 100%;
  background-size: 400%;
  transition: background 300ms ease-in-out;
}
.fourth:hover {
  background-position: 0;
}

.fifth {
  border-color: #8e44ad;
  border-radius: 0;
  color: #8e44ad;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: color 150ms ease-in-out;
}
.fifth:after {
  content: '';
  position: absolute;
  display: block;
  top: 0;
  left: 50%;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
  width: 0;
  height: 100%;
  background: #8e44ad;
  z-index: -1;
  transition: width 150ms ease-in-out;
}
.fifth:hover {
  color: #fff;
}
.fifth:hover:after {
  width: 110%;
}

.sixth {
  border-radius: 3em;
  border-color: #2ecc71;
  color: #2ecc71;
  background-image: linear-gradient(to bottom, transparent 50%, #2ecc71 50%);
  background-position: 0% 0%;
  background-size: 210%;
  transition: background 150ms ease-in-out, color 150ms ease-in-out;
}
.sixth:hover {
  color: #fff;
  background-position: 0 100%;
}

Preview