/* Guía de la N-400 (/es/n400 y /n400). Usa los tokens de styles.css. */
.n4-narrow { max-width: 760px; }
.n4-hero { padding-bottom: 8px; }
.n4-hero h1 { margin-bottom: 12px; }
.n4-steps p, .n4-list, .lede { max-width: 64ch; }

/* Índice de pasos: 2 columnas en teléfono, 3 en pantallas anchas. */
.n4-toc ol { list-style: none; margin: 20px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; }
@media (min-width: 640px) { .n4-toc ol { grid-template-columns: repeat(3, 1fr); } }
.n4-toc a { display: flex; gap: 10px; align-items: center; min-height: 44px; color: var(--ink-600); text-decoration: none; font-size: 15px; font-weight: 500; }
.n4-toc a:hover { color: var(--navy-900); }
.n4-toc .n4-num { width: 26px; height: 26px; font-size: 13px; transform: none; }

.n4-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 56px; }
@media (min-width: 768px) { .n4-steps { gap: 80px; } }
.n4-steps > li { scroll-margin-top: 96px; }
.n4-steps > li > * + * { margin-top: 20px; }
.n4-steps h2 { display: flex; gap: 14px; align-items: baseline; margin: 0 0 16px; }
.n4-num {
  flex: none; display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--navy-900); color: var(--gold-500); font-family: var(--sans);
  font-size: 18px; font-weight: 700; transform: translateY(-2px);
}
.n4-list { padding-left: 22px; display: grid; gap: 8px; line-height: 1.6; }
.n4-note { font-size: 15px; color: var(--ink-700); margin-top: 10px !important; }

/* Paso 3: casillas reales (se guardan en el navegador). */
.n4-check { list-style: none; padding-left: 0; }
.n4-check label { display: grid; grid-template-columns: 22px 1fr; gap: 12px; align-items: start; min-height: 44px; padding: 4px 0; cursor: pointer; }
.n4-check input { width: 22px; height: 22px; margin: 3px 0 0; accent-color: var(--navy-900); }

/* Paso 5: viñetas, no números (los números son de los 6 pasos). */
#presentar .n4-list, #file .n4-list { list-style: none; padding-left: 0; }
#presentar .n4-list li, #file .n4-list li { position: relative; padding-left: 24px; }
#presentar .n4-list li::before, #file .n4-list li::before { content: ""; position: absolute; left: 4px; top: .6em; width: 9px; height: 9px; border-radius: 50%; background: var(--navy-900); }

/* Calculadora */
.n4-calc { display: grid; gap: 20px; max-width: none; margin: 20px 0 10px; padding: 24px 20px; }
@media (min-width: 640px) { .n4-calc { padding: 28px 32px; } }
.n4-calc fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 10px; }
.n4-calc legend { font-weight: 600; font-size: 17px; color: var(--navy-900); margin-bottom: 10px; }
.n4-calc legend small { display: block; font-weight: 400; font-size: 14px; color: var(--ink-600); margin-top: 2px; }
.n4-row { display: flex; flex-wrap: wrap; gap: 12px; }
.n4-calc .n4-row label { display: grid; gap: 6px; font-size: 15px; flex: 1 1 130px; margin: 0; }
.n4-row select, .n4-row input[type="number"] {
  font: inherit; font-size: 16px; width: 100%; padding: 12px 14px; min-height: 52px; border-radius: var(--radius-button);
  border: 1px solid #9A8F70; background: var(--white); color: var(--ink-700); box-sizing: border-box;
}
.n4-calc select:focus, .n4-calc input:focus { outline: 2px solid var(--navy-900); outline-offset: 2px; border-color: var(--navy-900); }
.n4-calc .n4-row .n4-radio { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; margin: 0; min-height: 48px; padding-right: 12px; font-size: 16px; }
.n4-radio input { width: 20px; height: 20px; accent-color: var(--navy-900); }
.n4-radio input:focus-visible { outline: 2px solid var(--navy-900); outline-offset: 3px; }
.n4-calc .btn { width: 100%; min-height: 52px; }
.calc-result[hidden], .n4-callout[hidden], .n4-stale[hidden] { display: none; }
.calc-result { margin: 0; padding: 20px; border-radius: var(--radius-card); background: #EFE6CF; color: var(--navy-900); display: grid; gap: 4px; }
.calc-lead { font-size: 15px; color: var(--ink-700); }
.calc-result strong { font-family: var(--serif); font-size: clamp(28px, 7vw, 34px); line-height: 1.1; letter-spacing: -0.01em; }
.calc-body { font-size: 15px; color: var(--ink-700); }
.calc-next { font-size: 15px; margin-top: 6px; }
.calc-result.invalid { background: #FBEAEA; color: #8F2626; }
.calc-result.invalid strong { font-family: var(--sans); font-size: 16px; }

/* Avisos */
.n4-callout { padding: 20px 22px; border-radius: var(--radius-card); background: var(--navy-900); color: var(--parchment-50); }
.n4-callout p { margin: 6px 0 0; }
.n4-callout a { color: #E7C27A; }
.n4-callout.gold { background: #F6EAD0; color: var(--ink-700); }
.n4-callout.gold a { color: inherit; }
.n4-stale { margin-top: 12px; padding: 14px 18px; border-radius: var(--radius-button); background: #F6EAD0; }

/* Costos */
.n4-fees { display: grid; gap: 8px; }
@media (min-width: 640px) { .n4-fees { grid-template-columns: 1fr 1fr; } }
.n4-fee { display: grid; grid-template-columns: 1fr auto; align-items: center; column-gap: 16px; padding: 18px 20px; border-radius: var(--radius-card); background: var(--parchment-50); }
.n4-fee span { font-weight: 600; }
.n4-fee small { display: block; font-weight: 400; font-size: 14px; color: var(--ink-600); margin-top: 2px; }
.n4-fee b { font-family: var(--serif); font-size: 32px; line-height: 1; font-variant-numeric: lining-nums tabular-nums; }
.n4-fee.strong { background: var(--navy-900); color: var(--parchment-50); }
.n4-fee.strong small { color: var(--parchment-300); }
.n4-fee.strong b { color: var(--gold-500); }

/* Llamada a la app (como .new-cta en la portada) */
.n4-app { background: var(--navy-900); color: var(--parchment-50); border-radius: var(--radius-card); padding: 28px; }
.n4-app h3 { color: var(--white); font-size: 1.5rem; margin: 0 0 8px; }
.n4-app p { color: var(--parchment-300); margin: 0; }
.n4-app .store-row { margin-top: 18px; }

.n4-legal { margin: 56px 0 0; padding-top: 18px; border-top: 1px solid var(--parchment-300); font-size: 14px; color: var(--ink-600); }

/* «¿Cuál es tu caso?» (1.2.5) */
.n4-cases { display: grid; gap: 8px; }
.n4-calc .n4-cases .n4-radio { display: grid; grid-template-columns: 20px 1fr; align-items: center; gap: 12px; margin: 0; min-height: 52px; padding: 12px 14px; border: 1px solid var(--parchment-300); border-radius: var(--radius-button); background: var(--white); cursor: pointer; line-height: 1.35; }
.n4-calc .n4-cases .n4-radio:has(input:checked) { border-color: var(--navy-900); box-shadow: inset 0 0 0 1px var(--navy-900); background: #F4F1E8; }
.n4-unsure { margin: 4px 0 0; font-size: 15px; color: var(--ink-600); }
.n4-dated { display: grid; gap: 20px; }
.n4-dated[hidden], .n4-special[hidden], .n4-unsure[hidden] { display: none; }
.n4-special { display: grid; gap: 10px; padding: 20px 22px; border-radius: var(--radius-card); background: var(--white); border: 2px solid var(--navy-900); }
.n4-cases .n4-radio input { margin: 0; }
.n4-special-title { font-family: var(--serif); font-size: 22px; color: var(--navy-900); }
.n4-special p { margin: 0; line-height: 1.55; }
.n4-special .n4-cont { font-size: 15px; color: var(--ink-600); }

/* Dibujo de la green card: dónde está «Resident since». */
.n4-gc { margin: 4px 0 6px; display: grid; gap: 8px; justify-items: start; }
.n4-gc-svg { width: 100%; max-width: 300px; height: auto; display: block; }
.n4-gc figcaption { font-size: 14px; color: var(--ink-600); }

/* Movimiento: resultado y casos aparecen suave; los botones responden al toque. */
@media (prefers-reduced-motion: no-preference) {
  .calc-result:not([hidden]), .n4-special:not([hidden]), .n4-dated:not([hidden]) { animation: n4-in .28s ease-out both; }
  .n4-calc .btn { transition: transform .12s ease, background-color .15s ease; }
  .n4-calc .btn:active { transform: scale(.98); }
  .n4-calc .n4-cases .n4-radio { transition: border-color .15s ease, background-color .15s ease; }
  html { scroll-behavior: smooth; }
}
@keyframes n4-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* Escritorio: índice fijo a la izquierda y los pasos a la derecha. */
.n4-side { display: none; }
@media (min-width: 1100px) {
  .n4-hero .n4-narrow, .n4-layout { max-width: 1080px; }
  .n4-hero .n4-narrow > * { margin-left: 260px; }
  .n4-hero .n4-toc { display: none; }
  .n4-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); column-gap: 40px; align-items: start; }
  .n4-side { display: block; position: sticky; top: 96px; }
  .n4-side ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
  .n4-side a { display: flex; gap: 10px; align-items: center; min-height: 44px; padding: 0 10px; border-radius: var(--radius-button); color: var(--ink-600); text-decoration: none; font-size: 15px; font-weight: 500; }
  .n4-side a:hover { color: var(--navy-900); background: var(--parchment-50); }
  .n4-side a[aria-current] { color: var(--navy-900); background: var(--parchment-50); font-weight: 600; }
  .n4-side .n4-num { width: 26px; height: 26px; font-size: 13px; transform: none; }
  .n4-layout > .n4-legal { grid-column: 2; }
}