/* Registro en join (spec registro §6.1, D16, P3-3): complementa marketing.css (fuentes, colores --mk-*, .mk-skip). Clases
   su-*. Móvil primero: una columna hasta 768 px. Contraste WCAG AA (diferencia aceptada 9 del proyecto 1): el dorado
   (--mk-color-gold) solo como fondo con texto oscuro (5,5:1); como texto, enlace o foco, --mk-color-gold-text (4,5:1 sobre
   blanco, 4,2:1 sobre --mk-color-light: ahí los enlaces van en --mk-color-text); bordes de controles en --mk-color-muted. */
.su-body { background: var(--mk-color-light); color: var(--mk-color-text); }
.su-main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 48px; }

.su-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px;
  max-width: 1040px; margin: 0 auto; padding: 16px; }
.su-header__logo { font-size: 48px; } /* .mk-logo escala con font-size (alto del logo) */
.su-header__login { margin: 0; font-size: 0.95rem; }
.su-header__login a { color: var(--mk-color-text); }

.su-footer { max-width: 1040px; margin: 0 auto; padding: 24px 16px; font-size: 0.85rem; text-align: center; opacity: 0.85; }
.su-footer p { margin: 4px 0; }
.su-footer a { color: inherit; }
/* Paso 1 (QA Task 12): cuatro tarjetas de plan necesitan más ancho que los formularios; cabecera y pie lo siguen. */
.su-body--wide .su-main, .su-body--wide .su-header, .su-body--wide .su-footer { max-width: 1280px; }

.su-steps { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center; margin: 0 0 24px; padding: 0; list-style: none;
  font-size: 0.9rem; }
.su-steps__item { display: flex; align-items: center; gap: 6px; }
.su-steps__item[aria-current="step"] { font-weight: 700; }
.su-steps__number { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px;
  border-radius: 999px; border: 1px solid currentColor; font-size: 0.8rem; }
.su-steps__item[aria-current="step"] .su-steps__number { background: var(--mk-color-gold); border-color: transparent;
  color: var(--mk-color-text); }

.su-step { background: #fff; border-radius: 16px; padding: 24px 16px; box-shadow: 0 1px 3px rgb(0 0 0 / 8%); }
.su-step--narrow { max-width: 560px; margin: 0 auto; }
.su-title { margin: 0 0 8px; font-size: 1.6rem; line-height: 1.25; }
.su-lead { margin: 0 0 20px; font-size: 1.05rem; }

.su-alert, .su-notice { margin: 0 0 16px; padding: 12px 14px; border-radius: 10px; }
.su-alert { background: #fdecec; color: #8a1c1c; }
.su-notice { background: #e8f6f1; color: #135c47; }

.su-summary { margin: 0 0 16px; font-size: 0.95rem; }
.su-summary p { margin: 2px 0; }

.su-cycle { display: flex; align-items: center; gap: 8px; margin: 0 0 8px; }
.su-cycle__option { padding: 6px 12px; border-radius: 999px; color: inherit; text-decoration: none; border: 1px solid var(--mk-color-muted); }
.su-cycle__option[aria-current="true"] { background: var(--mk-color-gold); border-color: transparent; color: var(--mk-color-text);
  font-weight: 600; }
.su-cycle__note { margin: 0 0 16px; font-size: 0.9rem; }

.su-plans { display: grid; gap: 16px; margin-top: 16px; }
.su-plan { display: flex; flex-direction: column; gap: 8px; padding: 20px; border: 1px solid #e6e1d8; border-radius: 14px; }
.su-plan__name { margin: 0; font-size: 1.2rem; }
.su-plan__price { margin: 0; font-size: 1.5rem; font-weight: 700; }
.su-plan__tax, .su-plan__note { margin: 0; font-size: 0.85rem; }
.su-plan__features { flex: 1; margin: 8px 0; padding-left: 18px; font-size: 0.95rem; }
.su-plan__form { margin: 0; }
.su-plan .su-button { padding-inline: 12px; white-space: nowrap; } /* el nombre más largo («Elegir Independientes») no parte en dos líneas con otras fuentes (CI Linux) */

.su-form { display: grid; gap: 16px; }
.su-field { display: grid; gap: 6px; min-width: 0; align-content: start; }
.su-field__label { font-weight: 600; }
.su-field__help, .su-field__status { margin: 0; font-size: 0.85rem; opacity: 0.85; }
.su-field__status[data-status="available"] { color: #135c47; opacity: 1; }
.su-field__status[data-status="taken"], .su-field__status[data-status="blocked"], .su-field__status[data-status="format"],
.su-field__status[data-status="limit"] { color: #8a1c1c; opacity: 1; }
.su-field__error { margin: 0; font-size: 0.85rem; color: #8a1c1c; }
.su-input { width: 100%; min-width: 0; box-sizing: border-box; padding: 10px 12px; border: 1px solid var(--mk-color-muted); border-radius: 10px;
  font: inherit; background: #fff; }
.su-input[aria-invalid="true"] { border-color: #b42318; }
.su-input:focus-visible, .su-button:focus-visible, .su-link:focus-visible, .su-link-button:focus-visible,
.su-cycle__option:focus-visible, .su-check input:focus-visible, .su-check a:focus-visible { outline: 3px solid var(--mk-color-gold-text); outline-offset: 2px; }
.su-address { display: flex; align-items: center; gap: 6px; min-width: 0; }
.su-address__suffix { white-space: nowrap; font-size: 0.95rem; }
.su-check { display: flex; gap: 10px; align-items: flex-start; }
.su-check input { margin-top: 4px; }
.su-check a { color: var(--mk-color-gold-text); }

.su-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.su-button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 20px;
  border: 0; border-radius: 999px; background: var(--mk-color-gold); color: var(--mk-color-text); font: inherit; font-weight: 600;
  text-decoration: none; cursor: pointer; }
.su-button[disabled] { opacity: 0.5; cursor: not-allowed; }
.su-button--block { width: 100%; } /* «Crear mi cuenta» en la tarjeta angosta: alineado con la nota centrada de abajo */
.su-button--secondary { background: transparent; color: inherit; border: 1px solid var(--mk-color-muted); }
.su-link, .su-link-button { color: var(--mk-color-gold-text); font: inherit; }
.su-link-button { padding: 0; border: 0; background: none; text-decoration: underline; cursor: pointer; justify-self: start; }
.su-note { margin: 0; font-size: 0.9rem; text-align: center; }

.su-trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.su-spinner { width: 32px; height: 32px; margin: 16px auto; border: 3px solid #e6e1d8; border-top-color: var(--mk-color-gold-text);
  border-radius: 999px; animation: su-spin 0.9s linear infinite; }
@keyframes su-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .su-spinner { animation: none; } }

@media (min-width: 768px) {
  .su-main { padding-top: 40px; }
  .su-step { padding: 40px; }
  .su-title { font-size: 2rem; }
  .su-plans { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .su-form--two { grid-template-columns: 1fr 1fr; }
  .su-form--two .su-field--wide, .su-form--two .su-actions { grid-column: 1 / -1; }
}

@media (min-width: 1200px) {
  .su-plans { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}