style.css

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Fira Code', monospace;
}

.body {
  display: flex;
  flex-wrap: wrap;
}

body {
  background-color: #1d1e20;
  color: rgb(101, 83, 184);
  font-size: 1.5em;
  margin: 0;
  padding: 0;
  text-align: center;
}

#input-texto {
  width: 90%;
  height: 90%;
  font-size: 1em;
  padding: 1em;
  margin: 1em;
}

#btn-encriptar {
  width: 120px;
  height: 40px;
  text-transform: uppercase;
  border: none;
  border-radius: 10px;
  transition: all 0.3s ease 0s;
  cursor: pointer;
  margin: 1em;
}

#btn-desencriptar {
  width: 120px;
  height: 40px;
  text-transform: uppercase;
  border: none;
  border-radius: 10px;
  transition: all 0.3s ease 0s;
  cursor: pointer;
  margin: 1em; 
}

.msg-div {
  font-size: 1em;
  padding: 1em;
  margin: 1em;
}

#msg {
  width: 90%;
  height: 90%;
  font-size: 1em;
  padding: 1em;
  margin: 1em;
}

#btn-limpiar {
  width: 120px;
  height: 40px;
  text-transform: uppercase;
  border: none;
  border-radius: 10px;
  transition: all 0.3s ease 0s;
  cursor: pointer;
  margin: 1em;
}

#btn-copiar {
  width: 120px;
  height: 40px;
  text-transform: uppercase;
  border: none;
  border-radius: 10px;
  transition: all 0.3s ease 0s;
  cursor: pointer;
  margin: 1em;
}

.button:hover{
  animation: pulsate 1s 
  ease-in-out; /*The pulsate animation is added on hover. You could also add this on .button:focus and it will add it when clicking the button as well.*/
}

@keyframes pulsate {
  0%{
    box-shadow: 
    0 0 25px #5ddcff,
    0 0 50px #4e00c2;
  }
}



.footer {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: rgb(255, 255, 255);
  color: rgb(101, 83, 184);
  text-align: center;
}