style.css

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  outline: none;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

#logo {
  position: absolute;
  padding: 20px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  fill: transparent;
  animation: fill 0.5s ease forwards 3s;
}

#logo path:nth-child(2) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards;
}
#logo path:nth-child(3) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards;
}
#logo path:nth-child(4) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.3s;
}
#logo path:nth-child(5) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.6s;
}
#logo path:nth-child(6) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.9s;
}
#logo path:nth-child(7) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.2s;
}
#logo path:nth-child(8) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.5s;
}
#logo path:nth-child(9) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.8s;
}
#ht {
  position: absolute;
  padding: 20px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  fill: transparent;
  animation: fill 0.5s ease forwards 3s;
}

#ht path:nth-child(2) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards;
}
#ht path:nth-child(3) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards;
}
#ht path:nth-child(4) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.3s;
}
#ht path:nth-child(5) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.6s;
}
#ht path:nth-child(6) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 0.9s;
}
#ht path:nth-child(7) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.2s;
}
#ht path:nth-child(8) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.5s;
}
#ht path:nth-child(9) {
  stroke-dasharray: 100%;
  stroke-dashoffset: 100%;
  animation: line-anim 2s ease forwards 1.8s;
}
@keyframes line-anim {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes fill {
  from {
    fill: #94ceef;
  }
  to {
    fill: white;
  }
}
body {
  width: 100%;
  height: 100vh;
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}
body.dark-mode {
  width: 100%;
  height: 100vh;
  background-color: #0e7272;
  background-image: linear-gradient(315deg, #116e6e 0%, #181d20 74%);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}
body.dark-mode .button {
  border-color: #eee;
  color: #eee;
  transition: 0.3s;
}

body.dark-mode .button:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

body.light-mode {
width: 100%;
  height: 100vh;
  background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}

body.light-mode .button {
  transition: 0.3s;
}

body.light-mode .button:hover {
  background-color: rgba(255, 255, 255, 0.3);
}

.hover-this {
  transition: all 0.3s ease;
}

.cursor {
  pointer-events: none;
  position: fixed;
  padding: 0.2rem;
  background-color: #fff;
  border-radius: 50%;
  mix-blend-mode: difference;
  transition: transform 0.3s ease;
}

.hover-this:hover ~ .cursor {
  transform: translate(-50%, -50%) scale(20);
}

#logo path:hover {
  stroke: #000000;
}

.button {
  float: right;
  border-radius: 100px;
  width: 10em;
  margin: 30px 80px;
  padding: 10px 10px;
  text-align: center;
  border: 3px solid rgb(81, 5, 104);
  background-color: transparent;
  cursor: pointer;
  font-weight: bolder;
  font-size: 14px;
  color: rgb(75, 16, 92);
  font-family: sans-serif, Geneva, Tahoma, sans-serif;
}