style.css

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

body {
  font-family: sans-serif;
}

.main {
  width: 80vw;
  margin: auto;
  display: flex;
  justify-content: center;
}

.titulo {
  padding: 15px;
  width: 30vw;
  margin: auto;

}

.rodapie{
  padding: 15px;
  width: 30vw;
  margin: auto; 
}

.box {
  padding: 10px;
  margin: 0 10px 0 10px;
  box-shadow: 2px 2px 2px 1px rgba(0, 0, 0, 0.2);
  background-color: white;
  border-radius: 0.5em;
  width: 30vw;
  height: auto;
}

.btn {
  border: 0;
  color: white;
  font-weight: bold;
  background-color: blue;
  padding: 10px;
  margin-top: 10px;
  border-radius: 0.5em;
}

.text-input {
  border-radius: 0.5em;
  border: 1px solid rgba(0, 0, 0, 0.2);
  display: block;
  padding: 0.5em;
  width: 100%;
  height: 50px;
}

#fondo-pagina{
  background-color: #a1f7b2;
}

button{
  padding: .2em 2em;
  border: 2px solid;
  border-bottom: 2px solid;
  font-size: 16px;
  font-family: Calibri;
  cursor: pointer;
  margin: 0;
  margin-top: -3px;
  color: #FFFFFF;
  background-color:#527A6C;
  border-color: #FFFFFF;
  width: 100%;
  display: block;
  clear: both;
  margin: 5px 0px;
}

#encabezado-msj-orig{
  font-family: sans-serif;
  font-size: 14px;
  color: #006200;

}

#encabezado-msj-result{
  font-family: sans-serif;
  font-size: 20px;
  color: #006200;

}