.contenedor {
  display: flex;
  justify-content: center; 
  align-items: center;     
  height: 98vh;    

}

.box {
  width: 400px;
  max-width: 80%;
  height: 200px;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  flex-direction: column;
  box-sizing: border-box;
}
.derror{
  margin: 0 auto;
  position: relative;
  width: 90%;
  max-width: 400px;
  height: auto;
  font-size: 1rem;
  font-family:Arial, Helvetica, sans-serif;
  font-weight: bold;
  text-align: center;
  box-sizing: border-box;
  color: rgb(53, 53, 53);
  padding: 5px;
  border-radius: 10px;
  box-sizing: border-box;
}
.e0{
  background-color: rgb(211, 255, 182);
}
.e1{
  background-color: #ffafaf;
}
.titulo2{
  margin: 0 auto;
  position: relative;
  width: 100%;
  height: auto;
  font-size: 1.0rem;
  font-family:Arial, Helvetica, sans-serif;
  font-weight: bold;
  text-align: center;
  box-sizing: border-box;
  color: rgb(53, 53, 53);
  margin-bottom: 15px;
}
.titulo{
  margin: 0 auto;
  position: relative;
  width: 100%;
  height: auto;
  font-size: 2.0rem;
  font-family:Arial, Helvetica, sans-serif;
  font-weight: bold;
  text-align: center;
  box-sizing: border-box;
  color: rgb(53, 53, 53);
}

input {
  box-sizing: border-box;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 15px;
  outline: none;
  transition: all 0.2s ease;
  font-size: 1.2rem;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: bold;
  text-align: center;
}

input:focus {
  border-color: #3498db;
  box-shadow: 0 0 5px rgba(52, 152, 219, 0.4);
}

.btn-enviar {
  width: 100%;
  max-width: 200px;
  margin-top: 15px;
  padding: 10px;
  background-color: #3498db;
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn-enviar:hover {
  background-color: #2e86c1;
}