body {
    margin: 0;
    font-family: "Segoe UI", sans-serif;
    background: #f6f1f3;
    color: #2a1018;
}
.caja {
    max-width: 28rem;
    margin: 4rem auto;
    padding: 1.5rem;
    background: #fff;
    border-radius: 12px;
    border-top: 4px solid #9b2247;
}
label { display: block; margin-top: 0.8rem; font-weight: 600; }
input { width: 100%; padding: 0.5rem; margin-top: 0.25rem; }
button {
    margin-top: 1rem;
    background: #9b2247;
    color: #fff;
    border: 0;
    padding: 0.6rem 1rem;
    border-radius: 999px;
    font-weight: 700;
}
.errores { color: #9b2247; }
.aviso { color: #245c3a; }
a { color: #9b2247; }