button.button1 {
  background: none;
  border: 0;
  box-sizing: border-box;
  padding:15px 50px;
  box-shadow: inset 0 0 0 3px #333;
  color: #333;
  font-size: inherit;
  font-weight: 700;
  position: relative;
  vertical-align: middle;
}
button.button1::before, button.button1::after {
  box-sizing: inherit;
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
}

.draw {
  transition: color 0.25s;
}
.draw::before, .draw::after {
  border: 3px solid transparent;
  width: 0;
  height: 0;
}
.draw::before {
  top: 0;
  left: 0;
}
.draw::after {
  bottom: 0;
  right: 0;
}
.draw:hover {
  color: #0d36b2;
}
.draw:hover::before, .draw:hover::after {
  width: 100%;
  height: 100%;
}
.draw:hover::before {
  border-top-color: #0d36b2;
  border-right-color: #0d36b2;
  transition: width 0.25s ease-out, height 0.25s ease-out 0.25s;
}
.draw:hover::after {
  border-bottom-color: #0d36b2;
  border-left-color: #0d36b2;
  transition: border-color 0s ease-out 0.5s, width 0.25s ease-out 0.5s, height 0.25s ease-out 0.75s;
}

.meet:hover {
  color: #0d36b2;
}
.meet::after {
  top: 0;
  left: 0;
}
.meet:hover::before {
  border-top-color: #0d36b2;
  border-right-color: #0d36b2;
}
.meet:hover::after {
  border-bottom-color: #0d36b2;
  border-left-color: #0d36b2;
  transition: height 0.25s ease-out, width 0.25s ease-out 0.25s;
}

.center:hover {
  color: #6477b9;
}
.center::before, .center::after {
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  transform-origin: center;
}
.center::before {
  border-top: 2px solid #6477b9;
  border-bottom: 2px solid #6477b9;
  transform: scale3d(0, 1, 1);
}
.center::after {
  border-left: 2px solid #6477b9;
  border-right: 2px solid #6477b9;
  transform: scale3d(1, 0, 1);
}
.center:hover::before, .center:hover::after {
  transform: scale3d(1, 1, 1);
  transition: transform 0.5s;
}

.spin {
  width: 5em;
  height: 5em;
  padding: 0;
}
.spin:hover {
  color: #0eb7da;
}
.spin::before, .spin::after {
  top: 0;
  left: 0;
}
.spin::before {
  border: 2px solid transparent;
}
.spin:hover::before {
  border-top-color: #0eb7da;
  border-right-color: #0eb7da;
  border-bottom-color: #0eb7da;
  transition: border-top-color 0.15s linear, border-right-color 0.15s linear 0.1s, border-bottom-color 0.15s linear 0.2s;
}
.spin::after {
  border: 0 solid transparent;
}
.spin:hover::after {
  border-top: 2px solid #0eb7da;
  border-left-width: 2px;
  border-right-width: 2px;
  transform: rotate(270deg);
  transition: transform 0.4s linear 0s, border-left-width 0s linear 0.35s;
}
 
 
.buttons {
  isolation: isolate;
}