/* ==========================================================================
   SAPIENSIA CLAN — MÓDULO LECTOR EDITORIAL IN-BROWSER
   Archivo: css/reader.css
   Descripción: Estilos minimalistas de alta legibilidad, temas y navegación.
   ========================================================================== */

:root {
  /* --- TEMA OSCURO CARBÓN (POR DEFECTO) --- */
  --reader-bg: #0c0d12;
  --reader-surface: #14161f;
  --reader-text: #e2e8f0;
  --reader-text-muted: #94a3b8;
  --reader-heading: #f8fafc;
  --reader-accent: #f59e0b;
  --reader-border: rgba(255, 255, 255, 0.08);
  --reader-font-size: 1.15rem;
  --reader-line-height: 1.85;
}

/* --- TEMA SEPIA CÁLIDO --- */
body.theme-sepia {
  --reader-bg: #1c1917;
  --reader-surface: #292524;
  --reader-text: #fed7aa;
  --reader-text-muted: #a8a29e;
  --reader-heading: #ffedd5;
  --reader-accent: #fbbf24;
  --reader-border: rgba(251, 191, 36, 0.15);
}

/* --- TEMA NOCHE PROFUNDA (OLED) --- */
body.theme-oled {
  --reader-bg: #000000;
  --reader-surface: #0a0a0a;
  --reader-text: #d4d4d8;
  --reader-text-muted: #71717a;
  --reader-heading: #ffffff;
  --reader-accent: #38bdf8;
  --reader-border: rgba(255, 255, 255, 0.06);
}

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

body {
  background-color: var(--reader-bg);
  color: var(--reader-text);
  font-family: 'Plus Jakarta Sans', -apple-system, sans-serif;
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 100vh;
}

/* --- BARRA DE PROGRESO DE LECTURA FIJA SUPERIOR --- */
#reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--reader-accent), #fbbf24);
  width: 0%;
  z-index: 1100;
  transition: width 0.1s ease-out;
}

/* --- CABECERA FLOTANTE DEL LECTOR --- */
.reader-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--reader-bg);
  border-bottom: 1px solid var(--reader-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  padding: 12px 20px;
}

.reader-header-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.btn-back-clan {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--reader-text-muted);
  text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--reader-border);
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.2s ease;
}

.btn-back-clan:hover {
  color: var(--reader-heading);
  border-color: var(--reader-accent);
  background: rgba(245, 158, 11, 0.1);
}

.reader-book-info {
  text-align: center;
  flex: 1;
}

.reader-book-title {
  font-family: 'Cinzel', serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--reader-heading);
  letter-spacing: 0.06em;
}

.reader-book-author {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--reader-text-muted);
}

/* --- CONTROLES DE LECTURA (TAMAÑO DE LETRA, TEMAS, ÍNDICE) --- */
.reader-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.reader-btn-tool {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--reader-border);
  color: var(--reader-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.reader-btn-tool:hover {
  border-color: var(--reader-accent);
  color: var(--reader-accent);
}

/* --- CONTENEDOR PRINCIPAL DEL TEXTO --- */
.reader-container {
  max-width: 740px;
  margin: 0 auto;
  padding: 60px 24px 120px;
}

.reader-content {
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
  color: var(--reader-text);
}

.reader-content p {
  margin-bottom: 1.6em;
  text-align: justify;
  text-justify: inter-word;
}

.reader-content h1, 
.reader-content h2, 
.reader-content h3 {
  font-family: 'Cinzel', 'Instrument Serif', Georgia, serif;
  color: var(--reader-heading);
  margin-top: 2.2em;
  margin-bottom: 0.8em;
  line-height: 1.3;
}

.reader-content h1 {
  font-size: 2.2rem;
  border-bottom: 1px solid var(--reader-border);
  padding-bottom: 0.4em;
  text-align: center;
  margin-top: 1em;
}

.reader-content h2 {
  font-size: 1.6rem;
  color: var(--reader-accent);
}

.reader-content h3 {
  font-size: 1.3rem;
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
}

.reader-content hr {
  border: none;
  height: 1px;
  background: var(--reader-border);
  margin: 2.5em 0;
}

.reader-content em {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1.08em;
  color: var(--reader-accent);
}

.reader-content blockquote {
  border-left: 3px solid var(--reader-accent);
  padding: 8px 18px;
  margin: 1.8em 0;
  font-style: italic;
  background: rgba(245, 158, 11, 0.05);
  border-radius: 0 6px 6px 0;
}

/* --- BARRA INFERIOR DE NAVEGACIÓN ENTRE CAPÍTULOS --- */
.reader-footer-nav {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--reader-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-nav-chap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--reader-border);
  color: var(--reader-heading);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-nav-chap:hover:not(:disabled) {
  background: var(--reader-accent);
  color: #000;
  border-color: var(--reader-accent);
}

.btn-nav-chap:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* --- PANEL LATERAL DE ÍNDICE DE CAPÍTULOS --- */
.chapter-drawer {
  position: fixed;
  top: 0;
  right: -340px;
  width: 320px;
  height: 100vh;
  background: var(--reader-surface);
  border-left: 1px solid var(--reader-border);
  z-index: 1200;
  padding: 24px 20px;
  overflow-y: auto;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.6);
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.chapter-drawer.is-open {
  right: 0;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--reader-border);
}

.drawer-title {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  color: var(--reader-heading);
}

.btn-close-drawer {
  background: none;
  border: none;
  color: var(--reader-text-muted);
  font-size: 1.4rem;
  cursor: pointer;
}

.chapter-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chapter-item-link {
  display: block;
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--reader-text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.chapter-item-link:hover {
  color: var(--reader-heading);
  background: rgba(255, 255, 255, 0.04);
}

.chapter-item-link.is-active {
  color: var(--reader-accent);
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  font-weight: 600;
}

.drawer-downloads {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed var(--reader-border);
}

.download-link-btn {
  display: block;
  text-align: center;
  margin-top: 8px;
  padding: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--reader-accent);
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.download-link-btn:hover {
  background: var(--reader-accent);
  color: #000;
}