Collection of button hover effects by David Conner

<section class="buttons">
  <h1>Button Hover Effects</h1>
  <div class="container">
    <a href="https://twitter.com/Dave_Conner" class="btn btn-1">
      <svg>
        <rect x="0" y="0" fill="none" width="100%" height="100%" />
      </svg>
      Hover
    </a>
    <!-- svg hover inspired by https://codepen.io/karimbalaa/pen/qERbBY?editors=110 -->
    <!-- End of Button 1 -->

    <a href="https://twitter.com/Dave_Conner" class="btn btn-2">Hover</a>
    <!--End of Button 2 -->

    <a href="https://twitter.com/Dave_Conner" class="btn btn-3">Hover</a>
    <!--End of Button 3 -->

    <a href="https://twitter.com/Dave_Conner" class="btn btn-4"
      ><span>Hover</span></a
    >
    <!--End of Button 4 -->

    <a href="https://twitter.com/Dave_Conner" class="btn btn-5">Hover</a>
    <!--End of Button 5 -->
  </div>
  <p>
    Follow on
    <a href="https://twitter.com/Dave_Conner" target="_blank">Twitter</a>
  </p>
</section>

@import url(https://fonts.googleapis.com/css?family=Roboto:400, 100, 900);

//colors
$red: #e1332d;
$white: #fff;

//base styles

* {
  box-sizing: inherit;
  transition-property: all;
  transition-duration: 0.6s;
  transition-timing-function: ease;
}

html,
body {
  box-sizing: border-box;
  height: 100%;
  width: 100%;
}

body {
  background: $red;
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
}

// Main wrap
.buttons {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
  text-align: center;
  width: 100%;
}

// Button wrap
.container {
  align-items: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1em;
  text-align: center;

  @media (min-width: 600px) {
    flex-direction: row;
    justify-content: space-between;
  }
}

h1 {
  color: $white;
  font-size: 1.25em;
  font-weight: 900;
  margin: 0 0 2em;

  @media (min-width: 450px) {
    font-size: 1.75em;
  }

  @media (min-width: 760px) {
    font-size: 3.25em;
  }

  @media (min-width: 900px) {
    font-size: 5.25em;
    margin: 0 0 1em;
  }
}

p {
  color: $white;
  font-size: 12px;

  @media (min-width: 600px) {
    left: 50%;
    position: absolute;
    transform: translate(-50%, 0);
    top: 90%;
  }

  @media (max-height: 500px) {
    left: 0;
    position: relative;
    top: 0;
    transform: translate(0, 0);
  }

  a {
    background: rgba($white, 0);
    border-bottom: 1px solid;
    color: $white;
    line-height: 1.4;
    padding: 0.25em;
    text-decoration: none;

    &:hover {
      background: rgba($white, 1);
      color: $red;
    }
  }
}
//button styles

//default button
.btn {
  color: #fff;
  cursor: pointer;
  // display: block;
  font-size: 16px;
  font-weight: 400;
  line-height: 45px;
  margin: 0 0 2em;
  max-width: 160px;
  position: relative;
  text-decoration: none;
  text-transform: uppercase;
  width: 100%;

  //   @media(min-width: 400px) {
  //     display: inline-block;
  //     margin-right: 2.5em;

  //     &:nth-of-type(even) {
  //       margin-right: 0;
  //     }
  //   }

  @media (min-width: 600px) {
    margin: 0 1em 2em;

    //     &:nth-of-type(even) {
    //       margin-right: 2.5em;
    //     }

    //     &:nth-of-type(5) {
    //       margin-right: 0;
    //     }
  }

  &:hover {
    text-decoration: none;
  }
}

/////////////////////////////////
//button one
///////////////////////////////
.btn-1 {
  background: darken($red, 1.5%);
  font-weight: 100;

  svg {
    height: 45px;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
  }

  rect {
    fill: none;
    stroke: #fff;
    stroke-width: 2;
    stroke-dasharray: 422, 0;
    transition: all 0.35s linear;
  }
}

.btn-1:hover {
  background: rgba($red, 0);
  font-weight: 900;
  letter-spacing: 1px;

  rect {
    stroke-width: 5;
    stroke-dasharray: 15, 310;
    stroke-dashoffset: 48;
    transition: all 1.35s cubic-bezier(0.19, 1, 0.22, 1);
  }
}

////////////////////////////
//button two
//////////////////////////
.btn-2 {
  letter-spacing: 0;
}

.btn-2:hover,
.btn-2:active {
  letter-spacing: 5px;
}

.btn-2:after,
.btn-2:before {
  backface-visibility: hidden;
  border: 1px solid rgba(#fff, 0);
  bottom: 0px;
  content: ' ';
  display: block;
  margin: 0 auto;
  position: relative;
  transition: all 280ms ease-in-out;
  width: 0;
}

.btn-2:hover:after,
.btn-2:hover:before {
  backface-visibility: hidden;
  border-color: #fff;
  transition: width 350ms ease-in-out;
  width: 70%;
}

.btn-2:hover:before {
  bottom: auto;
  top: 0;
  width: 70%;
}

/////////////////////////////
//button -3
///////////////////////////
.btn-3 {
  background: lighten($red, 3%);
  border: 1px solid darken($red, 4%);
  box-shadow: 0px 2px 0 darken($red, 5%), 2px 4px 6px darken($red, 2%);
  font-weight: 900;
  letter-spacing: 1px;
  transition: all 150ms linear;
}

.btn-3:hover {
  background: darken($red, 1.5%);
  border: 1px solid rgba(#000, 0.05);
  box-shadow: 1px 1px 2px rgba(#fff, 0.2);
  color: lighten($red, 18%);
  text-decoration: none;
  text-shadow: -1px -1px 0 darken($red, 9.5%);
  transition: all 250ms linear;
}

/////////////////////////////
//button-4
///////////////////////////
.btn-4 {
  border: 1px solid;
  overflow: hidden;
  position: relative;

  span {
    z-index: 20;
  }

  &:after {
    background: #fff;
    content: '';
    height: 155px;
    left: -75px;
    opacity: 0.2;
    position: absolute;
    top: -50px;
    transform: rotate(35deg);
    transition: all 550ms cubic-bezier(0.19, 1, 0.22, 1);
    width: 50px;
    z-index: -10;
  }
}

.btn-4:hover {
  &:after {
    left: 120%;
    transition: all 550ms cubic-bezier(0.19, 1, 0.22, 1);
  }
}

/////////////////////////////
//button-5
///////////////////////////
.btn-5 {
  border: 0 solid;
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0);
  outline: 1px solid;
  outline-color: rgba(255, 255, 255, 0.5);
  outline-offset: 0px;
  text-shadow: none;
  transition: all 1250ms cubic-bezier(0.19, 1, 0.22, 1);
}

.btn-5:hover {
  border: 1px solid;
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.5), 0 0 20px rgba(255, 255, 255, 0.2);
  outline-color: rgba(255, 255, 255, 0);
  outline-offset: 15px;
  text-shadow: 1px 1px 2px #427388;
}