/* styles.css — theme trial: Slate & Indigo (fondo oscuro editorial).
   Tokens solo en :root. Ninguna pantalla redefine estos valores.
   Anterior (Paper & Indigo Ink, CLAUDE.md §6) comentado abajo por si se revierte. */

:root {
  /* Trial oscuro — contraste AA: ink/bg ≈14:1; muted/bg ≈7:1; accent/bg ≈8:1 */
  --color-bg: #12141a;
  --color-surface: #1c1f28;
  --color-ink: #edeae4;
  --color-ink-muted: #9aa0ac;
  --color-accent: #a8b4e8;
  --color-accent-hover: #c5cdf0;
  --color-line: #2c313d;
  --color-focus: #a8b4e8;
  --color-btn: #5c6bc0;
  --color-btn-hover: #7381d0;
  --color-btn-text: #ffffff;

  /* Paper & Indigo Ink (referencia / revert):
  --color-bg: #faf8f4;
  --color-surface: #ffffff;
  --color-ink: #14161a;
  --color-ink-muted: #565b66;
  --color-accent: #35407a;
  --color-accent-hover: #262e5c;
  --color-line: #e7e3db;
  --color-focus: #35407a;
  --color-btn: #35407a;
  --color-btn-hover: #262e5c;
  --color-btn-text: #ffffff;
  */

  --font-display: "Spectral", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --text-base: 1.125rem; /* 18px */
  --ratio: 1.25;
  --text-sm: calc(var(--text-base) / var(--ratio));
  --text-lg: calc(var(--text-base) * var(--ratio));
  --text-xl: calc(var(--text-lg) * var(--ratio));
  --text-2xl: calc(var(--text-xl) * var(--ratio));
  --text-3xl: calc(var(--text-2xl) * var(--ratio));

  --measure: 68ch;
  --radius: 6px;
  --space-xs: 0.35rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5rem;
  --shadow-soft: 0 1px 3px rgb(0 0 0 / 0.35);
  --page-pad: clamp(1.25rem, 4vw, 2.5rem);
  --max-width: 42rem;
  --max-width-wide: 68rem;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 180ms ease;
}

a:hover {
  color: var(--color-accent-hover);
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-md);
}

h1 {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-3xl));
}

h2 {
  font-size: clamp(var(--text-xl), 3.5vw, var(--text-2xl));
}

h3 {
  font-size: var(--text-lg);
}

p {
  margin: 0 0 var(--space-md);
  max-width: var(--measure);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--page-pad);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg);
}

.site-header__brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  flex-shrink: 0;
}

.site-header__nav {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-md);
}

.site-header__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  transition: color 180ms ease;
}

.site-header__link:hover {
  color: var(--color-accent);
}

.site-header__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius);
}

#books {
  scroll-margin-top: var(--space-lg);
}

.lang-switch {
  display: flex;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
}

.lang-switch a {
  color: var(--color-ink-muted);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.lang-switch a[aria-current="page"] {
  color: var(--color-ink);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-line);
}

.lang-switch a:hover {
  color: var(--color-accent);
}

/* Móvil: marca + idioma en fila 1; enlaces completos en fila 2 */
@media (max-width: 640px) {
  .site-header {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand lang"
      "nav nav";
    row-gap: var(--space-sm);
    column-gap: var(--space-md);
    align-items: center;
  }

  .site-header__brand {
    grid-area: brand;
  }

  .site-header__nav {
    grid-area: nav;
    flex: unset;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-md);
  }

  .site-header__link {
    overflow: visible;
    text-overflow: unset;
    white-space: normal;
  }

  .site-header > nav:last-of-type {
    grid-area: lang;
  }
}

.wrap {
  width: min(100% - 2 * var(--page-pad), var(--max-width-wide));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-xl);
}

.section--tight {
  padding-block: var(--space-lg);
}

.section__lead {
  color: var(--color-ink-muted);
  margin-bottom: var(--space-lg);
}

/* Hero: brand + headline + support + CTAs; photo as support visual */
.hero {
  display: grid;
  gap: var(--space-xl);
  padding: var(--space-xl) var(--page-pad) var(--space-2xl);
  align-items: center;
  border-bottom: 1px solid var(--color-line);
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-2xl);
    padding-block: var(--space-2xl);
  }
}

.hero__brand {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--space-sm);
  color: var(--color-ink);
}

.hero__lead {
  color: var(--color-ink-muted);
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.hero__credential {
  margin: 0 0 var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  max-width: 42rem;
  line-height: 1.45;
}

.hero__credential a {
  color: var(--color-accent);
  text-underline-offset: 0.15em;
}

.hero__credential a:hover {
  color: var(--color-accent-hover);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}

.hero__photo {
  justify-self: center;
  width: min(100%, 22rem);
}

.hero__photo img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-line);
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.hero__copy,
.hero__photo {
  animation: hero-enter 250ms ease-out both;
}

@keyframes hero-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__copy,
  .hero__photo {
    animation: none;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.2;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease,
    opacity 180ms ease;
}

.btn--primary {
  background: var(--color-btn);
  color: var(--color-btn-text);
}

.btn--primary:hover {
  background: var(--color-btn-hover);
  color: var(--color-btn-text);
}

.btn--primary:disabled,
.btn--primary[aria-disabled="true"] {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn--secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--secondary:hover {
  background: var(--color-surface);
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn--ghost,
.link-secondary {
  background: transparent;
  color: var(--color-ink-muted);
  border-color: transparent;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  padding: 0.35rem 0;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn--ghost:hover,
.link-secondary:hover {
  color: var(--color-accent);
}

.benefits {
  display: grid;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 768px) {
  .benefits {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
}

.benefits__item {
  padding: 0;
  border: none;
  background: transparent;
}

.benefits__item h3 {
  margin-bottom: var(--space-sm);
}

.benefits__item p {
  color: var(--color-ink-muted);
  margin: 0;
}

.topic-chips {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  gap: var(--space-sm);
  list-style: none;
  margin: var(--space-md) 0 0;
  padding: 0;
  max-width: 48ch;
}

.topic-chips__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: var(--text-sm);
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0.55rem 0.85rem;
}

.topic-chips__label {
  font-weight: 500;
}

.topic-chips__gancho {
  font-size: calc(var(--text-sm) * 0.92);
  color: var(--color-ink-muted);
  font-style: italic;
  line-height: 1.35;
}

.tema-teaser {
  margin: calc(var(--space-md) * -0.35) 0 var(--space-md);
  max-width: 44ch;
  color: var(--color-ink-muted);
  font-size: calc(var(--text-sm) * 0.95);
  line-height: 1.45;
}

.tema-teaser__hint {
  margin: 0;
  font-style: italic;
}

.tema-teaser__gancho {
  margin: 0 0 0.35rem;
  color: var(--color-accent);
  font-size: var(--text-sm);
  line-height: 1.4;
}

.tema-teaser__gancho strong {
  font-weight: 600;
}

.tema-teaser__body {
  margin: 0;
  font-size: calc(var(--text-sm) * 0.92);
  line-height: 1.45;
}

.tema-teaser--fade {
  animation: tema-teaser-fade 180ms ease-out;
}

@keyframes tema-teaser-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tema-teaser--fade {
    animation: none;
  }
}

.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
  max-width: 32rem;
}

.form-field {
  margin-bottom: var(--space-md);
}

.form-field label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-xs);
}

.form-field input,
.form-field select {
  width: 100%;
  font: inherit;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-ink);
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"] {
  border-color: #d47a7a;
}

.form-error {
  margin: var(--space-xs) 0 0;
  font-size: var(--text-sm);
  color: #e8a0a0;
  max-width: none;
}

.form-error[hidden] {
  display: none;
}

.site-dialog {
  margin: auto;
  padding: var(--space-lg);
  max-width: min(22rem, calc(100vw - 2 * var(--page-pad)));
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-body);
}

.site-dialog::backdrop {
  background: rgb(0 0 0 / 0.55);
}

.site-dialog__message {
  margin: 0 0 var(--space-md);
  font-size: var(--text-base);
  line-height: 1.45;
  text-align: center;
}

.site-dialog__actions {
  margin: 0;
  display: flex;
  justify-content: center;
}

.site-dialog__ok:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.form-field--check {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
}

.form-field--check input {
  width: auto;
  margin-top: 0.35rem;
  flex-shrink: 0;
}

.form-field--check label {
  margin: 0;
  font-weight: 400;
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.turnstile-slot {
  min-height: 1.5rem;
  margin-bottom: var(--space-md);
}

.books-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-line);
}

.books-toolbar__filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1 1 12rem;
}

.books-toolbar__chip {
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0.25rem 0.65rem;
  cursor: pointer;
  line-height: 1.3;
}

.books-toolbar__chip:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
}

.books-toolbar__chip[aria-pressed="true"] {
  color: var(--color-btn-text);
  background: var(--color-btn);
  border-color: var(--color-btn);
}

.books-toolbar__sort {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.books-toolbar__sort select {
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0.3rem 0.55rem;
  max-width: 12rem;
}

.books {
  display: grid;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.books--fade {
  animation: books-fade 180ms ease-out;
}

@keyframes books-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .books--fade {
    animation: none;
  }
}

@media (min-width: 768px) {
  .books {
    grid-template-columns: repeat(2, 1fr);
  }
}

.book {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: start;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-line);
}

.book--featured {
  grid-column: 1 / -1;
  padding: var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.book__cover,
.book__cover-placeholder {
  width: 5.5rem;
  aspect-ratio: 2 / 3;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.book__cover-btn {
  display: block;
  padding: 0;
  margin: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius);
  line-height: 0;
  transition: opacity 180ms ease;
}

.book__cover-btn .book__cover {
  display: block;
  transition: border-color 180ms ease, opacity 180ms ease;
}

.book__cover-btn:hover .book__cover {
  border-color: var(--color-accent);
  opacity: 0.92;
}

.book__cover-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.book__cover {
  height: auto;
  object-fit: cover;
}

.book__cover-placeholder {
  display: grid;
  place-items: center;
  background: var(--color-surface);
  color: var(--color-ink-muted);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1;
  user-select: none;
}

.book--featured .book__cover,
.book--featured .book__cover-placeholder {
  width: 7.5rem;
}

.cover-lightbox {
  /* Centrado en el viewport (top layer); relative rompía el modal y lo dejaba arriba del documento */
  position: fixed;
  inset: 0;
  width: fit-content;
  height: fit-content;
  max-width: min(90vw, 28rem);
  margin: auto;
  padding: var(--space-md);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-ink);
  box-shadow: var(--shadow-soft);
}

.cover-lightbox::backdrop {
  background: rgb(0 0 0 / 0.7);
}

.cover-lightbox[open] {
  animation: cover-lightbox-enter 180ms ease-out;
}

@keyframes cover-lightbox-enter {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover-lightbox[open] {
    animation: none;
  }
}

.cover-lightbox__img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius);
}

.cover-lightbox__close {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-ink-muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.cover-lightbox__close:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
}

.cover-lightbox__close:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.book__body {
  min-width: 0;
}

.book__badge {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-btn-text);
  background: var(--color-btn);
  border-radius: var(--radius);
  padding: 0.2rem 0.55rem;
  margin-bottom: var(--space-sm);
}

.book h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-xs);
}

.book__meta {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin-bottom: var(--space-xs);
}

.book__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: 0 0 var(--space-xs);
  padding: 0;
}

.book__tag {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0.1rem 0.45rem;
}

.book__langs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  list-style: none;
  margin: 0 0 var(--space-sm);
  padding: 0;
}

.book__lang {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0.15rem 0.45rem;
  line-height: 1.2;
}

.book p {
  color: var(--color-ink-muted);
  margin-bottom: var(--space-sm);
}

.book a {
  font-size: var(--text-sm);
  font-weight: 500;
}

.bio {
  display: grid;
  gap: var(--space-lg);
  align-items: start;
}

@media (min-width: 640px) {
  .bio {
    grid-template-columns: 10rem 1fr;
  }
}

.bio__photo {
  width: 10rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.bio p {
  margin-bottom: var(--space-md);
  max-width: var(--measure);
}

.bio p:last-child {
  margin-bottom: 0;
}

.faq {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: var(--measure);
}

.faq details {
  border-bottom: 1px solid var(--color-line);
  padding: var(--space-md) 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  list-style: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-lg);
  line-height: 1.2;
  color: var(--color-accent);
  transition: transform 0.15s ease;
}

.faq details[open] summary::after {
  content: "−";
}

.faq summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.faq details p {
  margin-top: var(--space-sm);
  color: var(--color-ink-muted);
}

.social-proof {
  margin: 0 0 var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.45;
  max-width: var(--measure);
}

.social-proof--placeholder {
  font-style: italic;
  opacity: 0.75;
  border-left: 2px solid var(--color-line);
  padding-left: var(--space-sm);
}

.social-proof__attr {
  white-space: nowrap;
}

.section--substack {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding-block: var(--space-xl);
  max-width: var(--measure);
}

.section--substack .btn {
  margin-top: var(--space-sm);
}

.sticky-subscribe {
  position: fixed;
  z-index: 40;
  right: max(var(--page-pad), env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  display: flex;
  align-items: center;
  gap: 0.35rem;
  max-width: calc(100vw - 2 * var(--page-pad));
  padding: 0.35rem;
  border-radius: calc(var(--radius) + 2px);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-soft);
}

.sticky-subscribe[hidden] {
  display: none !important;
}

.sticky-subscribe__link {
  padding: 0.65rem 1rem;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.sticky-subscribe__dismiss {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-ink-muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.sticky-subscribe__dismiss:hover {
  color: var(--color-ink);
  background: var(--color-bg);
}

.sticky-subscribe__dismiss:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .sticky-subscribe {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    width: min(22rem, calc(100vw - 1.5rem));
    justify-content: space-between;
  }

  .sticky-subscribe__link {
    flex: 1;
    white-space: normal;
    text-align: center;
    padding: 0.55rem 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq summary::after {
    transition: none;
  }
}

.ext-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ext-links a {
  font-weight: 500;
}

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-xl) var(--page-pad) var(--space-2xl);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.site-footer p {
  max-width: var(--measure);
}

.privacy-block {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-line);
}

/* Root language chooser (/, no-JS fallback) */
.lang-chooser {
  min-height: 100vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: var(--page-pad);
  gap: var(--space-lg);
}

.lang-chooser h1 {
  font-size: var(--text-2xl);
}

.lang-chooser__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

/* Thank-you (Sprint 4) */
.thankyou {
  max-width: var(--max-width);
  padding-block: var(--space-2xl);
}

.thankyou__topic-block {
  margin-bottom: var(--space-lg);
}

.thankyou__topic {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-xs);
}

.thankyou__topic-desc {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  max-width: 42rem;
  margin: 0;
}

.thankyou__essay h2 {
  margin-top: var(--space-lg);
}

.thankyou__fallback {
  margin-top: var(--space-md);
  padding: var(--space-md);
  border-left: 3px solid var(--color-line);
  color: var(--color-ink-muted);
}

.thankyou__cta {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-xs);
}

.thankyou__cta .btn {
  display: inline-block;
}

.thankyou__cta-note {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-md);
}

.thankyou__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.thankyou__home {
  margin-top: var(--space-xl);
  font-size: var(--text-sm);
}

/* ── Piezas interactivas (índice + teaser landing) ── */
.pieces-page {
  padding-block: var(--space-xl);
}

.pieces-page h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-sm);
}

.pieces-list {
  list-style: none;
  margin: var(--space-xl) 0 0;
  padding: 0;
}

.pieces-list__item {
  border-top: 1px solid var(--color-line);
}

.pieces-list__item:last-child {
  border-bottom: 1px solid var(--color-line);
}

.pieces-list__link {
  display: block;
  padding: var(--space-lg) 0;
  text-decoration: none;
  color: inherit;
  transition: color 180ms ease;
}

.pieces-list__link:hover .pieces-list__title {
  color: var(--color-accent);
}

.pieces-list__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--radius);
}

.pieces-list__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0 0 var(--space-xs);
  color: var(--color-ink);
  transition: color 180ms ease;
}

.pieces-list__standfirst {
  margin: 0 0 var(--space-xs);
  color: var(--color-ink-muted);
  max-width: var(--measure);
}

.pieces-list__meta {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.pieces-empty {
  margin-bottom: var(--space-lg);
}

.pieces-teaser__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--space-xs);
  color: var(--color-ink);
}

/* Shell de pieza: header site sobre cuerpo paper (scoped en .piece) */
body.piece-page {
  background: var(--color-bg);
}

.piece {
  --piece-paper: #f6f3ee;
  --piece-paper-2: #efeae2;
  --piece-ink: #1b1a18;
  --piece-ink-soft: #4a4741;
  --piece-ink-faint: #847e74;
  --piece-rule: #ddd6ca;
  --piece-accent: #8a3324;
  --piece-accent-soft: #b04a34;
  --piece-ok: #3d6b4a;
  --piece-warn: #8a6a1f;
  --piece-bad: #8a3324;
  --piece-shadow: 0 1px 2px rgba(27, 26, 24, 0.06), 0 8px 28px rgba(27, 26, 24, 0.07);
  --piece-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --piece-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  background: var(--piece-paper);
  color: var(--piece-ink);
  font-family: var(--piece-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.piece .wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 22px;
}

/* El theme de landing limita p a --measure (68ch); en piezas el Faro usa todo el wrap. */
.piece p {
  max-width: none;
}

.piece header.hero {
  display: block;
  padding: 64px 0 44px;
  border-bottom: 1px solid var(--piece-rule);
}

.piece .kicker {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--piece-accent);
  font-weight: 600;
  margin: 0 0 18px;
}

.piece .hero h1 {
  font-family: var(--piece-serif);
  font-weight: 600;
  font-size: clamp(30px, 6.4vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--piece-ink);
}

.piece .standfirst {
  font-family: var(--piece-serif);
  font-size: clamp(17px, 2.6vw, 20px);
  color: var(--piece-ink-soft);
  margin: 0 0 26px;
  line-height: 1.5;
  text-align: left;
  text-wrap: pretty;
}

.piece .byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
  font-size: 13px;
  color: var(--piece-ink-faint);
  margin: 0;
}

.piece .byline strong {
  font-family: var(--piece-sans);
  font-size: 13px;
  color: var(--piece-ink-soft);
  font-weight: 600;
}

.piece .byline__cred,
.piece .byline__time {
  line-height: 1.45;
  max-width: none;
}

.piece .byline span[aria-hidden] {
  color: var(--piece-rule);
}

.piece section.prose {
  padding: 44px 0 8px;
}

.piece .prose p {
  font-family: var(--piece-serif);
  font-size: 18px;
  line-height: 1.68;
  margin: 0 0 20px;
  color: var(--piece-ink);
  text-align: justify;
  text-wrap: pretty;
}

.piece .prose p.lede::first-letter {
  font-size: 3.4em;
  float: left;
  line-height: 0.82;
  padding: 6px 10px 0 0;
  color: var(--piece-accent);
  font-weight: 600;
}

.piece .pull {
  border-left: 3px solid var(--piece-accent);
  padding: 2px 0 2px 18px;
  margin: 28px 0;
  font-family: var(--piece-serif);
  font-size: 19px;
  line-height: 1.5;
  color: var(--piece-ink);
  font-style: italic;
  text-align: justify;
  text-wrap: pretty;
}

.piece .audit {
  margin: 40px 0 8px;
}

.piece .audit-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--piece-rule);
  margin-bottom: 22px;
}

.piece .audit-head h2 {
  font-family: var(--piece-serif);
  font-size: 22px;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--piece-ink);
}

.piece .counter {
  font-size: 12px;
  color: var(--piece-ink-faint);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.piece .bar {
  height: 3px;
  background: var(--piece-rule);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 26px;
}

.piece .bar > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--piece-accent);
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.piece .card {
  background: #fffdfa;
  border: 1px solid var(--piece-rule);
  border-radius: 6px;
  padding: 26px 24px;
  box-shadow: var(--piece-shadow);
}

@media (max-width: 520px) {
  .piece .card {
    padding: 22px 18px;
  }
}

.piece .q-no {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--piece-accent);
  font-weight: 600;
  margin-bottom: 10px;
}

.piece .q-text {
  font-family: var(--piece-serif);
  font-size: clamp(20px, 4.2vw, 25px);
  line-height: 1.3;
  margin: 0 0 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--piece-ink);
}

.piece .why {
  background: var(--piece-paper-2);
  border-radius: 5px;
  padding: 0;
  margin: 0 0 22px;
  border: 1px solid var(--piece-rule);
  overflow: hidden;
}

.piece .why > button {
  all: unset;
  display: flex;
  width: 100%;
  box-sizing: border-box;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--piece-ink-soft);
  letter-spacing: 0.02em;
}

.piece .why > button:hover {
  color: var(--piece-ink);
}

.piece .why > button:focus-visible {
  outline: 2px solid var(--piece-accent);
  outline-offset: -2px;
}

.piece .why .chev {
  transition: transform 0.25s;
  font-size: 11px;
  color: var(--piece-ink-faint);
}

.piece .why.open .chev {
  transform: rotate(180deg);
}

.piece .why .body {
  display: none;
  padding: 0 16px 16px;
}

.piece .why.open .body {
  display: block;
}

.piece .why .body p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--piece-ink-soft);
  text-align: justify;
  text-wrap: pretty;
}

.piece .why .body p:last-child {
  margin-bottom: 0;
}

.piece .why .body .lbl {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--piece-ink-faint);
  font-weight: 700;
  margin-bottom: 4px;
}

.piece .opts {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.piece .opt {
  all: unset;
  display: block;
  cursor: pointer;
  box-sizing: border-box;
  border: 1px solid var(--piece-rule);
  border-radius: 5px;
  padding: 14px 16px;
  background: #fff;
  transition: border-color 0.15s, background 0.15s, transform 0.08s;
}

.piece .opt:hover {
  border-color: var(--piece-ink-faint);
  background: #fffdf8;
}

.piece .opt:active {
  transform: translateY(1px);
}

.piece .opt:focus-visible {
  outline: 2px solid var(--piece-accent);
  outline-offset: 2px;
}

.piece .opt[aria-pressed="true"] {
  border-color: var(--piece-accent);
  background: #fdf6f4;
  box-shadow: inset 0 0 0 1px var(--piece-accent);
}

.piece .opt .t {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--piece-ink);
  margin-bottom: 3px;
}

.piece .opt .s {
  display: block;
  font-size: 13px;
  color: var(--piece-ink-faint);
  line-height: 1.45;
}

.piece .nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
}

.piece .lnk {
  all: unset;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--piece-ink-faint);
  font-weight: 600;
  padding: 6px 2px;
  letter-spacing: 0.02em;
}

.piece .lnk:hover {
  color: var(--piece-ink);
}

.piece .lnk:focus-visible {
  outline: 2px solid var(--piece-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

.piece .lnk[hidden] {
  display: none;
}

.piece .verdict {
  border-top: 4px solid var(--piece-accent);
}

.piece .verdict.ok {
  border-top-color: var(--piece-ok);
}

.piece .verdict.warn {
  border-top-color: var(--piece-warn);
}

.piece .verdict.bad {
  border-top-color: var(--piece-bad);
}

.piece .score {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.piece .score b {
  font-family: var(--piece-serif);
  font-size: 44px;
  line-height: 1;
  font-weight: 600;
  color: var(--piece-ink);
}

.piece .score em {
  font-style: normal;
  font-size: 14px;
  color: var(--piece-ink-faint);
}

.piece .verdict h3 {
  font-family: var(--piece-serif);
  font-size: clamp(21px, 4.4vw, 27px);
  margin: 10px 0 12px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--piece-ink);
}

.piece .verdict .say {
  font-size: 15.5px;
  color: var(--piece-ink-soft);
  margin: 0 0 24px;
  line-height: 1.6;
  text-align: justify;
  text-wrap: pretty;
}

.piece .gaps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--piece-rule);
}

.piece .gaps li {
  padding: 14px 0;
  border-bottom: 1px solid var(--piece-rule);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.piece .dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 7px;
}

.piece .dot.g2 {
  background: var(--piece-ok);
}

.piece .dot.g1 {
  background: var(--piece-warn);
}

.piece .dot.g0 {
  background: var(--piece-bad);
}

.piece .gaps .gq {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--piece-ink);
  display: block;
  margin-bottom: 3px;
  line-height: 1.4;
}

.piece .gaps .ga {
  font-size: 13.5px;
  color: var(--piece-ink-faint);
  line-height: 1.5;
}

.piece .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--piece-ink-faint);
}

.piece .legend span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.piece .legend i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: block;
}

.piece .close {
  padding: 48px 0 0;
}

.piece .close[hidden] {
  display: none;
}

.piece .close p {
  font-family: var(--piece-serif);
  font-size: 18px;
  line-height: 1.68;
  margin: 0 0 20px;
  color: var(--piece-ink);
  text-align: justify;
  text-wrap: pretty;
}

.piece .cta {
  margin: 36px 0 0;
  padding: 30px 26px;
  border-radius: 6px;
  background: var(--piece-ink);
  color: var(--piece-paper);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.piece .cta h4 {
  font-family: var(--piece-serif);
  font-size: 21px;
  margin: 0 0 10px;
  font-weight: 600;
  color: #fff;
  text-align: center;
}

.piece .cta p {
  font-family: var(--piece-sans);
  font-size: 14.5px;
  color: #c9c3b8;
  margin: 0 0 22px;
  line-height: 1.6;
  text-align: center;
}

.piece .cta a.cta-primary {
  display: inline-block;
  background: var(--piece-accent-soft);
  color: #fff;
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  padding: 13px 26px;
  border-radius: 4px;
  letter-spacing: 0.01em;
  transition: background 0.15s;
}

.piece .cta a.cta-primary:hover {
  background: #c4543b;
}

.piece .cta a.cta-primary:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

.piece .cta p.cta-secondary {
  display: block;
  width: 100%;
  margin-top: 16px;
  margin-bottom: 0;
  font-size: 13px;
  color: #c9c3b8;
  text-align: center;
}

.piece .cta p.cta-secondary a {
  color: #e8e2d8;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.piece .piece-footer {
  margin-top: 44px;
  padding: 26px 0 60px;
  border-top: 1px solid var(--piece-rule);
  font-size: 12.5px;
  color: var(--piece-ink-faint);
  line-height: 1.65;
}

.piece .piece-footer p {
  margin: 0 0 8px;
  text-align: justify;
  text-wrap: pretty;
  max-width: none;
  width: 100%;
}

.piece .piece-footer em {
  font-style: italic;
}

.piece .piece-footer a {
  color: var(--piece-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.piece .piece-footer a:hover {
  color: var(--piece-accent-soft);
}

.piece .piece-footer a:focus-visible {
  outline: 2px solid var(--piece-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .piece * {
    transition: none !important;
  }
}