style.css

* {
  scroll-behavior: smooth;
  padding: 0;
  margin: 0;
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  color: #111;
  background: #f5f5f5;
  overflow-x: hidden;
  text-align: center;
}
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
header,
footer {
  background: #222;
  padding: 5px;
  margin: 0;
  color: #fff;
  text-align: left;
  text-align: center;
}
header h1 {
  font-size: 43px;
  margin: 5px;
  padding: 5px;
  border-block: 1px solid #fff;
}
main {
  flex-grow: 1;
  padding: 40px 20px;
  max-width: 900px;
  margin: auto;
  padding: 30px 16%;
  color: #225;
  animation: fade 1s;
}
h2 {
  font-size: 30px;
  margin: 20px 0;
}
p {
  font-size: 18px;
  line-height: 1.6;
  margin-bottom: 20px;
}
a {
  color: #522;
  font-size: 18px;
}
a:hover {
  color: #08f;
}
ul {
  margin-left: 0;
  padding-left: 0;
  list-style: none;
}
li {
  font-size: 18px;
  margin: 10px 0;
  position: relative;
  padding-left: 20px;
}
li::before {
  content: "::";
  color: #07e;
  font-size: 24px;
  position: absolute;
  left: 0;
  top: 0;
  line-height: 18px;
}
#logo {
  width: 150px;
  height: 150px;
  border: 4.3px solid #225;
  border-radius: 50%;
  margin: 20px auto;
  padding: 3px;
  display: block;
  box-shadow: 0 0 10px #669;
}
.content {
  background: #fff;
  border-radius: 10px;
  padding: 10px;
  margin: 20px auto;
  box-shadow: 2px 3px 5px #1118;
  max-width: 400px;
  text-align: left;
}
button,
a {
  transition: 0.3s;
}
button {
  background: #0000;
  border: 1px solid #111;
  padding: 10px 20px;
  color: #111;
  font-size: 18px;
  border-radius: 5px;
  cursor: pointer;
  margin-top: 20px;
}
button:hover {
  background: #111;
  color: #fff;
  scale: 1.1;
}
hr {
  border: 1px solid #ccb;
  margin: 40px 0;
}
@keyframes fade {
  0% {
    opacity: 0;
    translate: 0 30px;
  }
  100% {
    opacity: 1;
    translate: 0;
  }
}
#bar {
  color: #111;
  text-align: left;
  margin-block: 20px;
}
#bar p {
  line-height: 1.3;
  margin: 5px 0;
}
#bar div {
  margin: 3px 0;
  width: 50%;
  height: 20px;
  background: #aaa;
  border-radius: 10px;
  position: relative;
  overflow: hidden;
}
#bar div::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  background: #111;
  width: 0;
  height: 100%;
  border-radius: 10px;
}
#bar div[data-lv]::after {
  width: calc(var(--lv, 0) * 20%);
}