<h1>CSS3 Button & Text-link<br>Hover Animations</h1>
<div class="container">
<p class="ttl_button">Button Hover<p/>
  <div class="button-container">
<a href="#" class="button button-1">hover me!</a>

<a href="#" class="button button-2">hover me!</a>

<a href="#" class="button button-3"><span>hover me!</span></a>

<a href="#" class="button button-4">hover me!</a>
</div>
<p class="ttl_textlink">Text Link Hover<p/>
<div class="textlink-container">
<a href="#" class="textlink textlink-1">hover me!</a>
<br>
<a href="#" class="textlink textlink-2">hover me!</a>
<br>
<a href="#" class="textlink textlink-3">hover me!</a>
<br>
<a href="#" class="textlink textlink-4">hover me!</a>
<br>
<a href="#" class="textlink textlink-5">hover me!</a>
<br>
<a href="#" class="textlink textlink-6">hover me!</a>

  </div>  
</div>

body {
  background-color: #333;
  font-family: sans-serif;
  padding: 30px;
}
h1 {
  font-size: 50px;
  line-height: 1.2;
  text-align: center;
  font-weight: bold;
  padding: 20px 0;
  color: #bff2fc;
}

p{
  color: #d7f0f4;
  text-align: center;
}
.ttl_textlink {
  margin-top: 80px;
}

.container {
  margin: 40px;
  .button-container {
    display: flex;
    margin: 20px auto;
    padding: 40px 20px;
    background-color: #fff;
    justify-content: space-between;
    align-items: center;
  }
  .textlink-container {
    display: flex;
    margin: 20px auto;
    padding: 40px 20px;
    background-color: #fff;
    justify-content: space-between;
    align-items: center;
  }
}

.button {
  height: 50px;
  width: 150px;
  display: grid;
  place-items: center;
  color: #fff;
  text-decoration: none;
  background-color: #0FBEFF;
  position: relative;
  transition: all 0.6s ease;
  border: 1px solid #0FBEFF;
}

// button-1
.button-1 {
  &:hover {
    opacity: 0.7;
  }
}

// button-2
.button-2{
  &:hover {
    color: #0FBEFF;
    background-color: #fff;
  }
}

// button-3
.button-3 {
  overflow: hidden;
  position: relative;
  color: #fff;
  &::before {
    content: "";
    height: 50px;
    width: 150px;
    display: block;
    position: absolute;
    transform: translateX(-100%);
    background-color: #fff;
    transition: all 0.3s ease;
  }
  span {
    position: relative;
    z-index: 1;
  }
  &:hover {
    &::before {
      transform: translateX(0);
    }
    span {
      color: #0FBEFF;
    }
  }
}

// button-4
@keyframes animate {
  0% {
    width: 0;
    height: 0;
    border-top-color: #0FBEFF;
    border-right-color: transparent;
    border-bottom-color: transparent;
    border-left-color: transparent;
  }

  50% {
    width: 100%;
    height: 0;
    border-top-color: #0FBEFF;
    border-right-color: #0FBEFF;
    border-bottom-color: transparent;
    border-left-color: transparent;
  }

  100% {
    width: 100%;
    height: 100%;
    border-top-color: #0FBEFF;
    border-right-color: #0FBEFF;
    border-bottom-color: transparent;
    border-left-color: transparent;
  }
}
@keyframes animates {
  0% {
    width: 0;
    height: 0;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    border-left-color: #0FBEFF;
  }

  50% {
    width: 0;
    height: 100%;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: #0FBEFF;
    border-left-color: #0FBEFF;
  }

  100% {
    width: 100%;
    height: 100%;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: #0FBEFF;
    border-left-color: #0FBEFF;
  }
}

.button-4 {
  &::before {
    content: "";
    position: absolute;
    top: -1px;
    left: -1px;
    width: 0;
    height: 0;
    background: transparent;
    border: 1px solid transparent;
  }
  &::after {
    content: "";
    position: absolute;
    top: -1px;
    left: -1px;
    width: 0;
    height: 0;
    background: transparent;
    border: 1px solid transparent;
  }
  &:hover {
    color: #0FBEFF;
    background-color: #fff;
    border-color: transparent;
    &::before {
      animation: animate 0.4s linear forwards;
      animation-delay: 0.3s;
    }
    &::after {
      animation: animates 0.4s linear forwards;
      animation-delay: 0.3s;
    }
  }
}


.textlink {
  color: black;
  text-decoration: none;
  transition: all .3s ease;
  display: inline-block;
}
// textlink-1
.textlink-1 {
  &:hover {
    color: #0FBEFF;
  }
}

// textlink-2
.textlink-2 {
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  &:hover {
    color: #0FBEFF;
    border-bottom: 1px solid #0FBEFF;
  }
}

// textlink-3
@keyframes textlink3 {
  0% {
    transform: translateX(-100%)
  }
  50% {
    transform: translateX(0)
  }
  100% {
    transform: translateX(100%)
  }
}
.textlink-3 {
  padding-bottom: 2px;
  position: relative;
  overflow: hidden;
  &::before {
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 1px;
    background-color: #000;
    bottom: 0;
    transform: translateX(-100%);
  }
  &:hover {
    &::before {
      animation: textlink3 1s ease;
    }
  }
}

// textlink-4
@keyframes textlink4 {
  0% {
    transform: translateX(0)
  }
  49% {
    transform: translateX(100%)
  }
  50% {
    transform: translateX(-100%)
  }
  100% {
    transform: translateX(0)
  }
}
.textlink-4 {
  padding-bottom: 2px;
  position: relative;
  overflow: hidden;
  &::before {
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 1px;
    background-color: #000;
    bottom: 0;
  }
  &:hover {
    &::before {
      animation: textlink4 1s ease;
    }
  }
}

// textlink-5
.textlink-5 {
  padding-bottom: 2px;
  position: relative;
  overflow: hidden;
  padding: 5px 0;
  &::before {
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 1px;
    background-color: #000;
    bottom: 0;
    transition: all .3s ease;
    transform: translateX(100%);
  }
  &::after {
    content: "";
    position: absolute;
    display: block;
    width: 100%;
    height: 1px;
    background-color: #000;
    top: 0;
    transition: all .3s ease;
    transform: translateX(-100%);
  }
  &:hover {
    &::before,
    &::after {
      transform: translateX(0);
    }
  }
}

// textlink-6
.textlink-6 {
  padding-bottom: 2px;
  position: relative;
  overflow: hidden;
  &::before {
    content: "";
    position: absolute;
    display: block;
    height: 1px;
    background-color: #000;
    bottom: 0;
    transition: all .3s ease;
    width: 0;
    left: 50%;
  }
 
  &:hover {
    &::before {
      left: 0;
      width: 100%;
    }
  }
}