/**
 * BibleApps - Estilos canónicos compartidos para Header, Main y App-Shell
 * Repositorio: /css/header-main.css
 * 
 * Reglas de diseño estandarizadas según .agents/skills/bibleapps-app-design/SKILL.md:
 * - Ancho canónico de <main> y .wrap: 1200px
 * - Controles flotantes: .homebtn (izquierda) y .themebtn (derecha)
 * - Prohibición estricta de enlaces a otras apps en la cabecera
 * - Header canónico: header.top (h1, kicker, stats, details.about)
 * - Navegación sticky: nav.tabs
 * - Sistema de tema claro/oscuro compatible con script anti-FOUC
 * - Soporte universal para protocolo file:// y entornos web
 */

/* ==========================================================================
   1. Variables de Tema y Diseño Canónico
   ========================================================================== */
:root {
  --maxw: 1200px;
  --bg: #eef1f5;
  --surface: #ffffff;
  --surface2: #e4e9f0;
  --surface3: #f7f9fb;
  --ink: #1a2233;
  --muted: #586377;
  --line: #cfd7e2;
  --accent: #234a7d;
  --accent-light: #e5eef9;
  --accent-hover: #19355a;
  --c-bible: #b4532a;
  --fix: #2f7d4f;
  --fix-bg: #e3f1e8;
  --warn: #9a6210;
  --warn-bg: #faedd0;
  --shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(35, 74, 125, 0.12);
  --radius: 12px;
  --serif: 'PT Serif', Georgia, 'Times New Roman', serif;
  --sans: 'PT Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141c;
    --surface: #171e29;
    --surface2: #1f2836;
    --surface3: #131922;
    --ink: #e6ebf3;
    --muted: #93a0b5;
    --line: #2c3748;
    --accent: #8fb3e8;
    --accent-light: #182638;
    --accent-hover: #b0ccfa;
    --c-bible: #e08a5b;
    --fix: #6fcf97;
    --fix-bg: #1c3326;
    --warn: #e6b450;
    --warn-bg: #382c12;
    --shadow: 0 4px 18px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 26px rgba(0, 0, 0, 0.45);
  }
}

:root[data-theme="dark"] {
  --bg: #0f141c;
  --surface: #171e29;
  --surface2: #1f2836;
  --surface3: #131922;
  --ink: #e6ebf3;
  --muted: #93a0b5;
  --line: #2c3748;
  --accent: #8fb3e8;
  --accent-light: #182638;
  --accent-hover: #b0ccfa;
  --c-bible: #e08a5b;
  --fix: #6fcf97;
  --fix-bg: #1c3326;
  --warn: #e6b450;
  --warn-bg: #382c12;
  --shadow: 0 4px 18px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 26px rgba(0, 0, 0, 0.45);
}

/* ==========================================================================
   2. Reseteo Base y Normalización
   ========================================================================== */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .15s;
}

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

/* ==========================================================================
   3. Ancho Canónico: Contenedor .wrap y <main>
   ========================================================================== */
.wrap {
  max-width: var(--maxw, 1200px);
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
  box-sizing: border-box;
}

main {
  display: block;
  width: 100%;
  box-sizing: border-box;
  flex: 1 0 auto;
}

main.wrap {
  max-width: var(--maxw, 1200px);
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
  width: 100%;
}

/* ==========================================================================
   4. Controles Flotantes Superiores (.homebtn y .themebtn)
   ========================================================================== */
.homebtn {
  position: absolute;
  left: 16px;
  top: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 14px;
  font: 500 13px var(--sans);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background .15s, border-color .15s, color .15s;
  z-index: 25;
}

.themebtn {
  position: absolute;
  right: 16px;
  top: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 12px;
  font: 500 13px var(--sans);
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
  z-index: 25;
}

.themebtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.themebtn .icon-sun,
.themebtn .icon-moon { display: none; }

/* Light mode (default): show moon icon (click → go dark) */
.themebtn .icon-moon { display: inline; }

/* Dark mode: show sun icon (click → go light) */
:root[data-theme="dark"] .themebtn .icon-sun { display: inline; }
:root[data-theme="dark"] .themebtn .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .themebtn .icon-sun { display: inline; }
  :root:not([data-theme="light"]) .themebtn .icon-moon { display: none; }
}

.homebtn:hover,
.themebtn:hover {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--accent);
}

/* ==========================================================================
   5. Bloque Principal del Encabezado (header.top)
   ========================================================================== */
header.top {
  padding: 28px 0 8px;
}

.kicker {
  font: 600 12px var(--sans);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  font: 700 clamp(26px, 4.4vw, 42px)/1.12 var(--serif);
  margin: 6px 0 10px;
  letter-spacing: -.01em;
}

.lead {
  color: var(--muted);
  max-width: 760px;
  margin: 0 0 16px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  margin: 2px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.stat {
  white-space: nowrap;
}

.stat b {
  font: 600 12.5px var(--sans);
  color: var(--ink);
  margin-right: 3px;
}

details.about {
  margin: 8px 0 12px;
}

details.about summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 13px;
  user-select: none;
}

details.about p.lead {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.5;
}

/* ==========================================================================
   6. Barra de Pestañas Pegajosa (nav.tabs)
   ========================================================================== */
nav.tabs {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

nav.tabs .wrap {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

nav.tabs button {
  flex: 0 0 auto;
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  color: var(--muted);
  font: 600 14px var(--sans);
  padding: 13px 14px;
  cursor: pointer;
}

nav.tabs button[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

nav.tabs button:focus-visible,
.chip:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ==========================================================================
   7. Elementos Auxiliares Comunes (Banner de Fuentes y Footer)
   ========================================================================== */
.sources-banner {
  background: color-mix(in srgb, var(--accent-light) 65%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 16px 0;
  font-size: 13px;
  line-height: 1.45;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.sources-text strong {
  color: var(--accent);
}

.sources-link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 12.5px;
}

footer.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding: 24px 0;
  font-size: 13px;
  color: var(--muted);
}

footer.app-footer .footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   8. Reglas Adaptativas (Responsive) y de Impresión
   ========================================================================== */
@media (max-width: 760px) {
  .themebtn {
    top: 10px;
  }
  .homebtn {
    top: 10px;
    padding: 5px 10px;
    font-size: 12px;
  }
  header.top {
    padding-top: 48px;
  }
}

@media print {
  nav.tabs,
  .themebtn,
  .homebtn {
    display: none !important;
  }
}