/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-canvas-default:      #ffffff;
  --color-canvas-subtle:       #f6f8fa;
  --color-canvas-inset:        #f6f8fa;
  --color-border-default:      #d0d7de;
  --color-border-muted:        #d8dee4;
  --color-fg-default:          #1f2328;
  --color-fg-muted:            #636c76;
  --color-fg-subtle:           #6e7781;
  --color-accent-fg:           #0969da;
  --color-accent-emphasis:     #0969da;
  --color-accent-subtle:       #ddf4ff;
  --color-btn-bg:              #f6f8fa;
  --color-btn-border:          rgba(31,35,40,.15);
  --color-btn-hover-bg:        #f3f4f6;
  --color-btn-primary-bg:      #1f883d;
  --color-btn-primary-hover:   #1a7f37;
  --color-btn-primary-text:    #ffffff;
  --color-danger:              #cf222e;
  --color-success:             #1a7f37;
  --color-attention:           #9a6700;
  --radius:                    6px;
  --shadow-sm:                 0 1px 0 rgba(31,35,40,.04);
  --shadow-md:                 0 3px 6px rgba(140,149,159,.15);
  --font:                      -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono:                 ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-canvas-default:    #0d1117;
    --color-canvas-subtle:     #161b22;
    --color-canvas-inset:      #010409;
    --color-border-default:    #30363d;
    --color-border-muted:      #21262d;
    --color-fg-default:        #e6edf3;
    --color-fg-muted:          #7d8590;
    --color-fg-subtle:         #6e7681;
    --color-accent-fg:         #2f81f7;
    --color-accent-emphasis:   #1f6feb;
    --color-accent-subtle:     rgba(31,111,235,.15);
    --color-btn-bg:            #21262d;
    --color-btn-border:        rgba(240,246,252,.1);
    --color-btn-hover-bg:      #30363d;
    --color-btn-primary-bg:    #238636;
    --color-btn-primary-hover: #2ea043;
    --color-btn-primary-text:  #ffffff;
    --color-danger:            #f85149;
    --color-success:           #3fb950;
    --color-attention:         #d29922;
    --shadow-sm:               0 0 transparent;
    --shadow-md:               0 3px 6px #010409;
  }
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--color-canvas-default);
  color: var(--color-fg-default);
  line-height: 1.5;
  font-size: 14px;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
a { color: var(--color-accent-fg); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-default);
  padding: 2rem 0 1.75rem;
  text-align: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: .3rem;
}

.logo-icon { font-size: 1.6rem; }

.logo h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-fg-default);
}

.tagline {
  color: var(--color-fg-muted);
  font-size: .875rem;
}

/* ============================================================
   GENERATOR CARD
   ============================================================ */
.generator-card {
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

.generator-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--color-border-muted);
}

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-group {
  margin-bottom: 1.1rem;
  position: relative;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-fg-default);
  margin-bottom: .35rem;
}

.form-group .optional {
  font-weight: 400;
  color: var(--color-fg-muted);
  font-size: .8rem;
}

textarea,
input[type="text"] {
  width: 100%;
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius);
  color: var(--color-fg-default);
  font-size: .875rem;
  font-family: var(--font);
  padding: .45rem .75rem;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  resize: vertical;
  line-height: 1.5;
}

textarea:focus,
input[type="text"]:focus {
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 3px rgba(9,105,218,.12);
  outline: none;
}

@media (prefers-color-scheme: dark) {
  textarea:focus,
  input[type="text"]:focus {
    box-shadow: 0 0 0 3px rgba(31,111,235,.3);
  }
}

textarea { min-height: 80px; }

select {
  width: 100%;
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--radius);
  color: var(--color-fg-default);
  font-size: .875rem;
  font-family: var(--font);
  padding: .45rem .75rem;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236e7781' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  cursor: pointer;
  transition: border-color .15s;
}

select:focus {
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 3px rgba(9,105,218,.12);
  outline: none;
}

.char-count {
  position: absolute;
  bottom: .4rem;
  right: .6rem;
  font-size: .72rem;
  color: var(--color-fg-subtle);
  pointer-events: none;
}

.hint {
  display: block;
  font-size: .75rem;
  color: var(--color-fg-muted);
  margin-top: .3rem;
}

/* ============================================================
   STYLE GRID
   ============================================================ */
.style-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: .5rem;
}

.style-option input { display: none; }

.style-card {
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius);
  padding: .6rem .5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
}

.style-option input:checked + .style-card {
  border-color: var(--color-accent-emphasis);
  background: var(--color-accent-subtle);
}

.style-card:hover { border-color: var(--color-accent-fg); }

.style-icon { font-size: 1.3rem; }

.style-card strong {
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-fg-default);
  display: block;
}

.style-card small {
  font-size: .68rem;
  color: var(--color-fg-muted);
  display: block;
  line-height: 1.3;
}

/* ============================================================
   CHAPTERS SELECTOR
   ============================================================ */
.chapters-selector {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.chapter-opt input { display: none; }

.chapter-opt span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 32px;
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
  color: var(--color-fg-default);
}

.chapter-opt input:checked + span {
  border-color: var(--color-accent-emphasis);
  background: var(--color-accent-emphasis);
  color: #fff;
}

.chapter-opt span:hover { border-color: var(--color-accent-fg); }

/* ============================================================
   PALETTE GRID
   ============================================================ */
.palette-grid {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.palette-option input { display: none; }

.palette-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  cursor: pointer;
}

.palette-preview {
  display: flex;
  border-radius: 20px;
  overflow: hidden;
  border: 2px solid var(--color-border-default);
  transition: border-color .15s;
  width: 64px;
  height: 24px;
}

.palette-preview span { flex: 1; display: block; }

.palette-option input:checked + .palette-preview {
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 2px rgba(9,105,218,.25);
}

.palette-option span:last-child {
  font-size: .68rem;
  color: var(--color-fg-muted);
}

/* ============================================================
   CAPTCHA
   ============================================================ */
.captcha-group {
  display: flex;
  justify-content: flex-start;
}

/* ============================================================
   SUBMIT BUTTON — debajo del textarea
   ============================================================ */
.btn-generate {
  width: 100%;
  padding: .5rem 1rem;
  background: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
  font-size: .875rem;
  font-weight: 600;
  font-family: var(--font);
  border: 1px solid rgba(31,35,40,.15);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  transition: background .15s;
  margin-top: .4rem;
}

.btn-generate:hover:not(:disabled) { background: var(--color-btn-primary-hover); }
.btn-generate:disabled { opacity: .6; cursor: not-allowed; }

.btn-icon { font-size: 1rem; }

/* Separador entre story+botón y el resto del form */
.form-separator {
  border: none;
  border-top: 1px solid var(--color-border-muted);
  margin: 1.25rem 0;
}

.form-extra-label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-fg-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .75rem;
}

/* ============================================================
   INFO SECTION
   ============================================================ */
.info-section { margin: 2rem 0; }

.info-section h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--color-border-muted);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.info-card {
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius);
  padding: 1rem;
}

.info-icon { font-size: 1.4rem; margin-bottom: .4rem; }

.info-card h3 {
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: .3rem;
}

.info-card p {
  font-size: .8rem;
  color: var(--color-fg-muted);
  line-height: 1.5;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-section { margin: 2rem 0; }

.faq-section h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: .75rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--color-border-muted);
}

details {
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius);
  margin-bottom: .4rem;
  overflow: hidden;
}

summary {
  padding: .65rem .9rem;
  cursor: pointer;
  font-weight: 600;
  font-size: .875rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  color: var(--color-fg-default);
}

summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; font-size: .9rem; color: var(--color-fg-muted); }
details[open] summary::after { content: '−'; }

details p {
  padding: 0 .9rem .75rem;
  font-size: .825rem;
  color: var(--color-fg-muted);
  line-height: 1.6;
}

/* ============================================================
   AD CONTAINERS
   ============================================================ */
.ad-container {
  text-align: center;
  margin: 1rem auto;
  overflow: hidden;
}

.ad-between-pages {
  margin: 0;
  padding: .75rem 0;
  border-top: 1px solid var(--color-border-muted);
  border-bottom: 1px solid var(--color-border-muted);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--color-border-default);
  padding: 1.25rem 0;
  text-align: center;
  margin-top: 2rem;
  color: var(--color-fg-muted);
  font-size: .8rem;
  background: var(--color-canvas-subtle);
}

.site-footer nav { margin-top: .3rem; }
.site-footer a { color: var(--color-fg-muted); }
.site-footer a:hover { color: var(--color-accent-fg); }

/* ============================================================
   READER — navbars ESTÁTICOS (no sticky)
   ============================================================ */
body.reader-mode {
  background: var(--color-canvas-inset);
}

/* Header del lector: estático, no sticky */
.reader-header {
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-default);
  padding: .6rem 0;
  /* SIN position:sticky ni position:fixed */
}

.reader-nav {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.back-link {
  font-size: .8rem;
  color: var(--color-fg-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.back-link:hover { color: var(--color-fg-default); text-decoration: none; }

.chapter-info {
  flex: 1;
  text-align: center;
  overflow: hidden;
}

.chapter-info h1 {
  font-size: .9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-counter {
  font-size: .72rem;
  color: var(--color-fg-muted);
}

.nav-arrows {
  display: flex;
  gap: .4rem;
  flex-shrink: 0;
}

/* ============================================================
   BOTONES READER
   ============================================================ */
.btn-nav {
  padding: .3rem .7rem;
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--radius);
  color: var(--color-fg-default);
  font-size: .78rem;
  font-weight: 600;
  font-family: var(--font);
  transition: background .15s;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.btn-nav:hover { background: var(--color-btn-hover-bg); text-decoration: none; }

.btn-nav.primary {
  background: var(--color-btn-primary-bg);
  border-color: rgba(31,35,40,.15);
  color: var(--color-btn-primary-text);
}

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

.btn-nav.large {
  padding: .45rem 1.1rem;
  font-size: .875rem;
}

/* ============================================================
   READER MAIN — imágenes pegadas sin espacios
   ============================================================ */
.reader-main {
  padding-top: 0;
  padding-bottom: 0;
}

/* Índice de capítulos */
.chapter-index {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-wrap: wrap;
  padding: .75rem 1rem;
  font-size: .82rem;
  color: var(--color-fg-muted);
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-default);
}

.chapter-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-default);
  color: var(--color-fg-muted);
  font-size: .75rem;
  font-weight: 700;
  transition: background .15s, color .15s;
}

.chapter-pill:hover { background: var(--color-btn-hover-bg); color: var(--color-fg-default); text-decoration: none; }

.chapter-pill.active {
  background: var(--color-accent-emphasis);
  border-color: var(--color-accent-emphasis);
  color: #fff;
}

/* Contenedor de páginas: sin gap, sin padding */
.pages-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  /* SIN gap ni padding — imágenes pegadas */
}

.page-wrapper {
  width: 100%;
  max-width: 800px;
  /* SIN margin ni padding */
  line-height: 0; /* elimina espacio fantasma debajo de img */
}

/* Sin número de página visible */
.page-number { display: none; }

.comic-page {
  width: 100%;
  display: block;
  /* SIN border-radius para que encajen perfectamente */
  border-radius: 0;
  margin: 0;
  padding: 0;
  line-height: 0;
}

/* Anuncio entre páginas: sin margen que rompa continuidad */
.ad-between-pages {
  width: 100%;
  max-width: 800px;
  margin: 0;
}

/* Navegación inferior — estática al final */
.bottom-nav {
  display: flex;
  justify-content: center;
  gap: .75rem;
  padding: 1rem;
  flex-wrap: wrap;
  background: var(--color-canvas-subtle);
  border-top: 1px solid var(--color-border-default);
  /* NO position:sticky */
}

/* Anuncio arriba del lector */
.ad-reader-top {
  padding: .5rem 0;
  background: var(--color-canvas-subtle);
  border-bottom: 1px solid var(--color-border-muted);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 600px) {
  .generator-card { padding: 1rem .875rem; }
  .style-grid { grid-template-columns: repeat(2, 1fr); }
  .logo h1 { font-size: 1.2rem; }
  .reader-nav { flex-wrap: wrap; }
  .nav-arrows { order: 3; width: 100%; justify-content: center; }
  .chapter-info { order: 1; width: 100%; }
  .back-link { order: 2; }
  .info-grid { grid-template-columns: 1fr; }
  .btn-nav.large { width: 100%; text-align: center; justify-content: center; }
}