index.css

body {
    background-color: #f2f2f2;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 20px;
  }

body::before {
    content: "";
    background-image: url('img/fondo.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
    z-index: -1;
  }
  
.container {
    padding: 20px;
    margin: 20px;
    border: 20px solid #70c4c4;
    background: #ffffff;
  }

h1 {
    text-align: center;
  }

form {
    display: flex;
    flex-direction: column;
  }

label {
    margin-bottom: 5px;
  }
  
button[type="submit"] {
    background-color: #1b1d1d; 
    color: #ffffff; 
    text-align: right; 
    font-size: 12px; 
    padding: 10px; 
    width: 50px;
  }

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 5px;
    margin-bottom: 10px;
}