NeonLightButtonHoverAnimation/style.css at main · Harikantsharmag/NeonLightButtonHoverAnimation · GitHub

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/*rgb(0, 255, 98);*/

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #000;
}

a {
  display: inline-block;
  padding: 20px 40px;
  text-decoration: none;
  text-transform: uppercase;
  color: rgb(0, 255, 98);
  overflow: hidden;
  position: relative;
  font-size: 20px;
  letter-spacing: 5px;
  transition: 0.25s;
}

a:hover {
  background-color: rgb(0, 255, 98);
  box-shadow: 0 0 5px rgb(0, 255, 98), 0 0 10px rgb(0, 255, 98),
    0 0 15px rgb(0, 255, 98), 0 0 20px rgb(0, 255, 98);
  color: #000;
  transition-delay: 1s;
}

a span {
  position: absolute;
  display: block;
  content: "";
}

a span:nth-child(1) {
  top: 0;
  left: -100%;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgb(0, 255, 98));
}

a:hover span:nth-child(1) {
  left: 100%;
  transition: 1s;
}

a span:nth-child(2) {
  top: -100%;
  right: 0;
  height: 100%;
  width: 3px;
  background: linear-gradient(180deg, transparent, rgb(0, 255, 98));
}

a:hover span:nth-child(2) {
  top: 100%;
  transition: 1s;
  transition-delay: 0.25s;
}

a span:nth-child(3) {
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 3px;
  background: linear-gradient(270deg, transparent, rgb(0, 255, 98));
}

a:hover span:nth-child(3) {
  right: 100%;
  transition: 1s;
  transition-delay: 0.5s;
}

a span:nth-child(4) {
  bottom: -100%;
  left: 0;
  height: 100%;
  width: 3px;
  background: linear-gradient(180deg, transparent, rgb(0, 255, 98));
}

a:hover span:nth-child(4) {
  bottom: 100%;
  transition: 1s;
  transition-delay: 0.75s;
}