style.css

@import url("https://fonts.googleapis.com/css2?family=Ubuntu:wght@300;400;500;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Ubuntu", sans-serif;
  transition: background-color 0.3s ease-in;
  letter-spacing: 1.5px;
}
h1 {
  padding: 18px 0;
  letter-spacing: 2px;
  border-bottom: 1px solid #cacaca;
  background-color: #fdf9ff;
  color: #302e4d;
}
body {
  text-align: center;
  background-color: #f2f2fc;
}
section {
  display: grid;
  width: fit-content;
  grid-template-columns: 1fr 1fr 1fr;
  color: #302e4d;
}
section div {
  width: 80px;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 55px;
  cursor: pointer;
  border-color: #302e4d;
  font-weight: 400;
}

div:nth-of-type(2),
div:nth-of-type(8) {
  border-left: 1.5px solid;
  border-right: 1.5px solid;
}
div:nth-of-type(4),
div:nth-of-type(6) {
  border-top: 1.5px solid;
  border-bottom: 1.5px solid;
}
div:nth-of-type(5) {
  border: 1.5px solid;
}

h1 span {
  position: absolute;
  right: 20px;
  height: 35px;
  aspect-ratio: 1;
  background-color: #302e4d;
  border-radius: 50%;
}
.span {
  background-color: #fff;
}
.h1 {
  color: #fff;
  background-color: #222222;
}
.body {
  background-color: #151515;
}
.sec {
  color: #fff;
  border-color: #fff;
}
.h2 {
  color: #fff;
}

button {
  font-size: 20px;
  background-color: #302e4d;
  color: #fdf9ff;
  font-weight: 400;
  margin-top: 50px;
  padding: 10px 20px;
  border: 1px solid #cacaca;
  letter-spacing: 2px;
}

h2 {
  position: absolute;
  left: 50%;
  transform: translate(-50%, 5vh);
  color: red;
}
article {
  margin: 0 auto;
  margin-top: 20vh;
  width: fit-content;
  position: relative;
}
article hr {
  border: none;
  top: 0px;
  left: 0;
  border-top: 4px solid green;
  position: absolute;
  width: 100%;
  display: none;
}
#hr2 {
  top: 100%;
  width: 140%;
  transform: rotate(-45deg);
  transform-origin: 0;
  display: none;
}