style.css

body {
  font-family: 'Open Sans', sans-serif;
  color: #000000;
  padding: 0px;
  text-align: center;
  margin: 10px auto;
  transition: background-color 0.3s, color 0.3s;
}
h1 {
  text-align: center;
}
.box-header {
  border: 3px solid black;
  border-radius: 30px;
  color: #000000;
  margin: 0px 10%;
  text-align: center;
}
.boxes {
  margin: 10px auto;
  display: flex;
  flex-direction: row;
  gap: 10px;
  padding: 0px 10%;
  p {
    text-align: left;
  }
}
.box {
  border: 3px solid black;
  border-radius: 30px;
  color: #000000;
  padding: 10px;
}
p {
  text-align: center;
}
img {
  width: 30px;
  height: 30px;
}
@media (prefers-color-scheme: dark) {
  html {
    background-color: #000000;
    color: #fff;
  }
  body {
    background-color: #000000;
    color: #fff;
  }
  .box-header {
    background-color: #000000;
    color: #fff;
    border: 3px solid white;
  }
  .box {
    background-color: #000000;
    color: #fff;
    border: 3px solid white;
  }
  a {
    text-decoration: underline;
    color: #ffffff;
  }
  a:hover {
    color: #ffffff;
    text-decoration: underline;
  }
  #share-icon {
    content: url('share_white.svg');
    cursor: pointer;
  }
}
@media (prefers-color-scheme: light) {
  html {
    background-color: #ffffff;
    color: #000000;
  }
  body {
    background-color: #ffffff;
    color: #000000;
  }
  .box-header {
    background-color: #ffffff;
    color: #000000;
    border: 3px solid black;
  }
  .box {
    background-color: #ffffff;
    color: #000000;
    border: 3px solid black;
  }
  a {
    text-decoration: underline;
    color: #000000;
  }
  a:hover {
    color: #000000;
    text-decoration: underline;
  }
  #share-icon {
    content: url('share_black.svg');
    cursor: pointer;
  }
}
#icon-container {
  display: flex;
  justify-content: center;
  align-items: center;
}
#url-text {
  cursor: pointer;
}