body {
    font-family: Arial, sans-serif;
    max-width: 400px;
    margin: auto;
    padding: 1em;
    background: #f9f9f9;
}

form {
    background: white;
    padding: 1em;
    border-radius: 10px;
    box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

input, button {
    width: 100%;
    padding: 0.7em;
    margin-top: 0.5em;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    background: #28a745;
    color: white;
    border: none;
    font-weight: bold;
}

.errores {
    background: #f8d7da;
    padding: 1em;
    border-radius: 5px;
    color: #721c24;
    margin-bottom: 1em;
}