.btn4 {
  font-size: 1em;
  line-height: 1em;
  letter-spacing: 0.04em;
  display: inline-block;
  transition: font-size 0.3s linear;
}
.btn4--svg {
  position: relative;
  height: 42px;
  width: 190px;
  overflow: hidden;
  border-radius: 21px;
}
.btn4--svg:hover {
  font-size: 1.125em;
}
.btn4--svg:hover .btn4--svg__circle circle {
  -webkit-transform: scale(0);
  -moz-transform: scale(0);
  -ms-transform: scale(0);
  transform: scale(0);
}
.btn4--svg:hover .btn4--svg__label {
  color: #fff;
}
.btn4--svg:hover .btn4--svg__border--left path,
.btn4--svg:hover .btn4--svg__border--right path {
  stroke-dasharray: 61.8204345703 61.8204345703;
  stroke-dashoffset: 0;
  -webkit-transition-delay: 0.25s;
  -webkit-transition-duration: 0.5s;
  -webkit-transition-timing-function: ease-in-out;
  -webkit-transition-property: stroke-dashoffset;
  -moz-transition-delay: 0.25s;
  -moz-transition-duration: 0.5s;
  -moz-transition-property: stroke-dashoffset;
  -ms-transition-delay: 0.25s;
  -ms-transition-duration: 0.5s;
  -ms-transition-timing-function: ease-in-out;
  -ms-transition-property: stroke-dashoffset;
  transition-delay: 0.25s;
  transition-duration: 0.5s;
  transition-timing-function: ease-in-out;
  transition-property: stroke-dashoffset;
}
.btn4--svg__label {
  -webkit-font-smoothing: antialiased;
  text-align: center;
  color: black;
  z-index: 3;
  width: 100%;
  -webkit-transition: color 0.5s ease-in-out;
  -moz-transition: color 0.5s ease-in-out;
  -ms-transition: color 0.5s ease-in-out;
  transition: color 0.5s ease-in-out;
}
.btn4--svg__circle circle {
  -webkit-transition: transform 0.5s ease-in-out;
  -webkit-transform: scale(1.1);
  -webkit-transform-origin: 50% 50%;
  -moz-transition: transform 0.5s ease-in-out;
  -moz-transform: scale(1.1);
  -moz-transform-origin: 50% 50%;
  -ms-transition: transform 0.5s ease-in-out;
  -ms-transform: scale(1.1);
  -ms-transform-origin: 50% 50%;
  transition: transform 0.5s ease-in-out;
  transform: scale(1.1);
  transform-origin: 50% 50%;
}
.btn4--svg__border--left path, .btn4--svg__border--right path {
  stroke-dasharray: 61.8204345703 61.8204345703;
  -webkit-transition-duration: 0s;
  -webkit-transition-timing-function: ease-in-out;
  -webkit-transition-property: stroke-dashoffset;
  -webkit-transition-delay: 0.5s;
  -moz-transition-duration: 0s;
  -moz-transition-timing-function: ease-in-out;
  -moz-transition-property: stroke-dashoffset;
  -moz-transition-delay: 0.5s;
  -ms-transition-duration: 0s;
  -ms-transition-timing-function: ease-in-out;
  -ms-transition-property: stroke-dashoffset;
  -ms-transition-delay: 0.5s;
  transition-duration: 0s;
  transition-timing-function: ease-in-out;
  transition-property: stroke-dashoffset;
  transition-delay: 0.5s;
}
.btn4--svg__border--left path {
  stroke-dashoffset: -61.8204345703;
}
.btn4--svg__border--right path {
  stroke-dashoffset: 61.8204345703;
}
.btn4--svg svg, .btn4--svg__label {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -webkit-transform-origin: 50% 50%;
  -moz-transform: translate(-50%, -50%);
  -moz-transform-origin: 50% 50%;
  -ms-transform: translate(-50%, -50%);
  -ms-transform-origin: 50% 50%;
  transform: translate(-50%, -50%);
  transform-origin: 50% 50%;
}