html, body {
  height: 100%;
  display: grid;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  color: #222;
}

.cntr {
  margin: auto;
}

.btn-radio {
  cursor: pointer;
  display: inline-block;
  float: left;
  -webkit-user-select: none;
  user-select: none;
}
.btn-radio:not(:first-child) {
  margin-left: 20px;
}
@media screen and (max-width: 480px) {
  .btn-radio {
    display: block;
    float: none;
  }
  .btn-radio:not(:first-child) {
    margin-left: 0;
    margin-top: 15px;
  }
}
.btn-radio svg {
  fill: none;
  vertical-align: middle;
}
.btn-radio svg circle {
  stroke-width: 2;
  stroke: #C8CCD4;
}
.btn-radio svg path {
  stroke: #008FFF;
}
.btn-radio svg path.inner {
  stroke-width: 6;
  stroke-dasharray: 19;
  stroke-dashoffset: 19;
}
.btn-radio svg path.outer {
  stroke-width: 2;
  stroke-dasharray: 57;
  stroke-dashoffset: 57;
}
.btn-radio input {
  display: none;
}
.btn-radio input:checked + svg path {
  transition: all 0.4s ease;
}
.btn-radio input:checked + svg path.inner {
  stroke-dashoffset: 38;
  transition-delay: 0.3s;
}
.btn-radio input:checked + svg path.outer {
  stroke-dashoffset: 0;
}
.btn-radio span {
  display: inline-block;
  vertical-align: middle;
}