body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  text-align: center;
  align-items: center;
}

.colored-a {
  color: rgb(51, 135, 251);
  text-decoration: none;
}

hr {
  width: 70vh;
}

footer {
  display: block;
  unicode-bidi: isolate;
  background-color: rgb(47, 153, 215);
  text-align: center;
  color: #f0f0f0;
  padding: 20px;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 100;
}

.btn {
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: "Gill Sans", "Gill Sans MT", Calibri, "Trebuchet MS", sans-serif;
  height: 5vh;
  margin: 0;
  transition: background-color 0.5s, color 0.5s;
  background-color: #f0f0f0;
  color: #333;
  padding: 12px 25px;
  font-size: 16px;
  font-weight: bold;
}

.dark {
  background-color: #1e1e1e;
  color: #f0f0f0;
}

.dark .icon-sun {
  display: none;
}

.icon-moon {
  display: none;
}

.icon-sun {
  display: none;
}