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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f4f4f2;
    color: #222;
    font-size: 16px;
}

.container-registro {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 24px 16px 48px;
}

.card-registro {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 16px rgba(0,0,0,.08);
    width: 100%;
    max-width: 560px;
    overflow: hidden;
}

.header-museo {
    background: #1a5276;
    color: #fff;
    padding: 28px 24px 20px;
}

.header-evento {
    background: #7d3c98;
}

.header-museo h1 {
    font-size: 1.4rem;
    font-weight: 600;
}

.header-museo .subtitulo {
    font-size: .9rem;
    opacity: .8;
    margin-top: 4px;
}

form {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.campo-grupo {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

    .campo-grupo label {
        font-size: .9rem;
        font-weight: 500;
        color: #444;
    }

.campo {
    border: 1.5px solid #ddd;
    border-radius: 8px;
    padding: 12px 14px;
    font-size: 1rem;
    width: 100%;
    transition: border-color .2s;
    background: #fafafa;
}

    .campo:focus {
        outline: none;
        border-color: #1a5276;
        background: #fff;
    }

.campo-folio {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 4px;
    text-align: center;
    text-transform: uppercase;
}

.fila-dos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.radio-grupo {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 8px 0;
}

.radio-opcion {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: .95rem;
}

.folio-destacado {
    background: #f0ebf8;
    border-radius: 10px;
    padding: 16px;
    border: 1.5px dashed #9b59b6;
}

.btn-registrar {
    background: #1a5276;
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 14px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: background .2s;
    margin-top: 8px;
}

    .btn-registrar:hover {
        background: #154360;
    }

.error {
    color: #c0392b;
    font-size: .82rem;
}

.hint {
    color: #888;
    font-size: .82rem;
}

@media (max-width: 480px) {
    .fila-dos {
        grid-template-columns: 1fr;
    }

    .header-museo {
        padding: 20px 16px 16px;
    }

    form {
        padding: 16px;
    }
}