* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  transition: all 0.5s;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

body.a-mode {
  background-color: rgb(255, 0, 0);
  color: rgb(255, 0, 0);
}

body.m-mode {
  background-color: rgb(12, 128, 223);
  color: rgb(12, 128, 223);
}

#toggleBtn {
  font-size: 4em;
  text-shadow: 0px 0px 20px #ffffffa4;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}