/* =========================================
   DREVAIA — PREMIUM GLOBAL UI (NIVEL DIOS PRO)
   ✅ Sin duplicados | ✅ Estructura modular | ✅ Responsive completo
   ✅ Accesibilidad | ✅ Variables CSS | ✅ Optimizado rendimiento
========================================= */

:root {
  /* Colores base */
  --bg-primary: #0b0b0d;
  --bg-secondary: #0e0e11;
  --bg-card: #121216;
  --bg-panel: rgba(255, 255, 255, 0.04);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.18);
  
  /* Acentos */
  --gold: #d4b08c;
  --gold-light: rgba(212, 176, 140, 0.6);
  --gold-glow: rgba(212, 176, 140, 0.12);
  
  /* Texto */
  --text-primary: #f2f2f2;
  --text-secondary: rgba(255, 255, 255, 0.85);
  --text-muted: rgba(255, 255, 255, 0.65);
  --text-faint: rgba(255, 255, 255, 0.45);
  
  /* Sombras */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 22px 55px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 40px rgba(0, 0, 0, 0.8);
  
  /* Tipografía */
  --font-main: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Cormorant Garamond", Georgia, serif;
  --font-mono: "Segoe UI", system-ui, Arial, sans-serif;
  
  /* Espaciado */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-xxl: 70px;
  
  /* Radio */
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --radius-full: 999px;
  
  /* Transiciones */
  --transition-fast: 0.2s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;
}

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

/* =========================================
   BASE & TYPOGRAPHY
========================================= */
body {
  margin: 0;
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.dark {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* =========================================
   TYPOGRAPHY SYSTEM
========================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-sm);
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3rem);
  letter-spacing: 0.6px;
  color: var(--gold);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--text-secondary);
}

h3 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

a {
  color: var(--gold);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  opacity: 0.85;
  text-decoration: underline;
}

/* =========================================
   LAYOUT & CONTAINERS
========================================= */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding-inline: var(--space-sm);
}

.container.narrow {
  max-width: 680px;
}

/* =========================================
   HERO SECTION
========================================= */
.hero {
  text-align: center;
  padding: var(--space-xxl) var(--space-sm) calc(var(--space-xxl) * 1.2);
}

.hero.small {
  padding: 70px var(--space-sm) 50px;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  color: var(--gold);
  font-weight: 600;
  letter-spacing: 0.4px;
  margin-bottom: var(--space-md);
}

.hero p {
  max-width: 520px;
  margin: var(--space-md) auto;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 1.1rem;
}

/* =========================================
   BRAND CLAIM
========================================= */
.brand-claim {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-muted);
  font-style: italic;
  margin: var(--space-sm) auto var(--space-lg);
  max-width: 720px;
  letter-spacing: 0.3px;
  line-height: 1.6;
}

/* =========================================
   SEARCH INPUT (UNIFICADO)
========================================= */
#ebookSearchInput,
#search {
  width: 100%;
  max-width: 420px;
  margin: 0 auto var(--space-lg);
  display: block;
  padding: 12px 18px;
  font-size: 15px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-medium);
  background: var(--bg-panel);
  color: var(--text-primary);
  font-family: var(--font-main);
  transition: var(--transition-base);
}

#ebookSearchInput:focus,
#search:focus {
  outline: none;
  border-color: var(--gold-light);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

#ebookSearchInput::placeholder,
#search::placeholder {
  color: var(--text-faint);
  opacity: 1;
}

/* =========================================
   GRID SYSTEM (UNIFICADO)
========================================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
  transition: opacity var(--transition-base);
}

.grid.is-filtering {
  opacity: 0.55;
}

/* =========================================
   CARD COMPONENT
========================================= */
.card,
.book,
.book-card,
.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  text-align: center;
  transition: var(--transition-base);
  animation: drevaiaAppear 0.7s ease forwards;
  opacity: 0;
  transform: translateY(14px);
}

.card:hover,
.book:hover,
.book-card:hover,
.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

@keyframes drevaiaAppear {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Escalonamiento de animaciones */
.card:nth-child(1), .book:nth-child(1), .book-card:nth-child(1), .related-card:nth-child(1) { animation-delay: 0.04s; }
.card:nth-child(2), .book:nth-child(2), .book-card:nth-child(2), .related-card:nth-child(2) { animation-delay: 0.08s; }
.card:nth-child(3), .book:nth-child(3), .book-card:nth-child(3), .related-card:nth-child(3) { animation-delay: 0.12s; }
.card:nth-child(4), .book:nth-child(4), .book-card:nth-child(4), .related-card:nth-child(4) { animation-delay: 0.16s; }
.card:nth-child(5), .book:nth-child(5), .book-card:nth-child(5), .related-card:nth-child(5) { animation-delay: 0.20s; }
.card:nth-child(6), .book:nth-child(6), .book-card:nth-child(6), .related-card:nth-child(6) { animation-delay: 0.24s; }

.card h3,
.book h3,
.book-card h3,
.related-card h4 {
  color: var(--gold);
  font-size: 1.375rem;
  margin-bottom: var(--space-sm);
  font-family: var(--font-serif);
}

.card p,
.book p,
.book-card p,
.related-card p {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

/* =========================================
   BUTTONS
========================================= */
.cta,
.button,
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-family: var(--font-main);
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-base);
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-secondary);
}

.cta:hover,
.button:hover,
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--gold-light);
}

.cta.primary,
.button.primary,
.btn.primary {
  background: white;
  color: black;
}

.cta.primary:hover,
.button.primary:hover,
.btn.primary:hover {
  background: #e6e6e6;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.cta.secondary,
.button.secondary,
.btn.secondary {
  background: transparent;
  border-color: var(--border-medium);
  color: var(--text-secondary);
}

.cta.secondary:hover,
.button.secondary:hover,
.btn.secondary:hover {
  border-color: var(--gold-light);
  background: rgba(212, 176, 140, 0.08);
}

/* =========================================
   BREADCRUMB
========================================= */
.breadcrumb {
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
  color: var(--text-faint);
  display: flex;
  justify-content: center;
  gap: 8px;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--gold);
  text-decoration: underline;
}

.breadcrumb span {
  color: var(--text-faint);
}

/* =========================================
   POST STYLES (BLOG) — ESCALA EDITORIAL AJUSTADA
========================================= */
.post {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

.post h1 {
  font-size: 1.65rem;
}

.post h2 {
  font-size: 1.15rem;
}

.post h3 {
  font-size: 1.05rem;
}

.post blockquote {
  font-size: 1rem;
}

.post-title {
  max-width: 760px;
  margin: 0 auto var(--space-md);
  line-height: 1.25;
  text-align: center;
}

.post-title span {
  display: block;
}

.post-meta {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  color: var(--text-faint);
  font-style: italic;
}

blockquote {
  border-left: 3px solid var(--gold);
  padding-left: var(--space-md);
  margin: var(--space-xl) 0;
  font-style: italic;
  color: var(--text-muted);
  position: relative;
  font-size: 1.15rem;
  line-height: 1.6;
}

blockquote::before {
  content: '"';
  position: absolute;
  left: -15px;
  top: -10px;
  font-size: 3rem;
  color: rgba(212, 176, 140, 0.15);
  font-family: Georgia, serif;
}

/* =========================================
   CTA BOX
========================================= */
.ctaBox,
.brevo-echo {
  margin-top: var(--space-xxl);
  padding: 50px var(--space-lg);
  border-radius: var(--radius-xl);
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.015)
  );
  border: 1px solid var(--border-light);
  text-align: center;
}

.ctaText,
.brevo-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto;
}

.brevo-text {
  font-style: italic;
  letter-spacing: 0.2px;
}

/* =========================================
   WORLDWIDE SECTION
========================================= */
.worldwide {
  margin: 120px auto;
  padding: 70px 25px;
  text-align: center;
  border-radius: var(--radius-xl);
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.045),
    rgba(255, 255, 255, 0.015)
  );
  border: 1px solid var(--border-light);
  max-width: 900px;
}

.worldwide-title {
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  font-family: var(--font-serif);
}

.worldwide-subtitle {
  max-width: 620px;
  margin: 0 auto var(--space-xl);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.worldwide-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.worldwide-links a {
  padding: 14px 22px;
  border-radius: var(--radius-full);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
  background: var(--bg-panel);
  transition: var(--transition-base);
}

.worldwide-links a:hover {
  transform: translateY(-3px);
  border-color: var(--gold-light);
  background: rgba(255, 255, 255, 0.07);
  color: white;
}

/* =========================================
   RELATED POSTS
========================================= */
.related {
  margin-top: var(--space-xxl);
  text-align: left;
}

.related h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  font-family: var(--font-serif);
}

/* =========================================
   LANGUAGE NOTICE (BANDERAS)
========================================= */
.language-notice {
  text-align: center;
  margin: 25px auto 10px;
  font-size: 0.95rem;
  opacity: 0.75;
}

.language-notice a {
  text-decoration: none;
  margin: 0 8px;
  font-size: 1.2rem;
  display: inline-block;
  transition: transform var(--transition-fast);
}

.language-notice a:hover {
  transform: scale(1.15);
}

/* =========================================
   NAVBAR (NUEVO - PARA TODAS LAS PÁGINAS)
========================================= */
.navbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(14, 14, 17, 0.95);
  backdrop-filter: blur(10px);
  padding: 12px var(--space-sm);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  display: flex;
  justify-content: center;
}

.navbar-content {
  max-width: 1200px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  height: 40px;
  transition: opacity var(--transition-fast);
}

.navbar-logo:hover {
  opacity: 0.85;
}

/* =========================================
   FOOTER
========================================= */
footer {
  margin-top: 140px;
  text-align: center;
  padding: 90px var(--space-sm) 60px;
  color: var(--text-faint);
  border-top: 1px solid var(--border-light);
  font-size: 0.875rem;
}

footer a {
  color: var(--gold);
  text-decoration: none;
  transition: var(--transition-fast);
}

footer a:hover {
  text-decoration: underline;
}

/* =========================================
   NO RESULTS MESSAGE
========================================= */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
  padding: 60px 20px;
  font-style: italic;
}

/* =========================================
   DIVIDER
========================================= */
.soft-divider {
  border: 0;
  height: 1px;
  background: var(--border-light);
  margin: 90px auto;
  max-width: 420px;
}

/* =========================================
   READING RITUAL (BLOG)
========================================= */
.reading-ritual {
  max-width: 680px;
  margin: 60px auto 90px;
  text-align: center;
  opacity: 0.85;
}

.reading-ritual p {
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-muted);
  letter-spacing: 0.2px;
}

.close-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* =========================================
   INTERNAL LINK
========================================= */
.internal-link {
  margin-top: var(--space-md);
  font-size: 0.9rem;
  color: var(--text-faint);
  text-align: center;
}

.internal-link a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
}

.internal-link a:hover {
  text-decoration: underline;
}

/* =========================================
   GLOBAL LANGUAGES BOX (POST)
========================================= */
.global-languages {
  margin-top: 35px;
  text-align: center;
}

.global-title {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.global-links {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.global-links a {
  font-size: 0.88rem;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-medium);
  text-decoration: none;
  color: var(--text-secondary);
  transition: var(--transition-base);
  background: transparent;
}

.global-links a:hover {
  border-color: var(--gold-light);
  transform: translateY(-2px);
  color: white;
  background: rgba(212, 176, 140, 0.1);
}

/* =========================================
   MODAL STYLES (BLINDAJE OSCURO)
========================================= */
body.dark .modal-overlay,
body.dark .overlay,
body.dark .backdrop {
  background: rgba(0, 0, 0, 0.75);
}

body.dark .modal,
body.dark .modal-content,
body.dark .reading-modal,
body.dark .popup,
body.dark .dialog {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-glow);
}

body.dark .modal *,
body.dark .modal-content * {
  background-color: transparent !important;
}

body.dark .modal a {
  color: var(--gold);
}

body.dark .modal-close,
body.dark .close,
body.dark .btn-close {
  color: var(--text-primary);
  opacity: 0.7;
}

body.dark .modal-close:hover,
body.dark .close:hover {
  opacity: 1;
}

/* =========================================
   RESPONSIVE DESIGN
========================================= */
@media (max-width: 768px) {
  :root {
    --space-xs: 6px;
    --space-sm: 12px;
    --space-md: 18px;
    --space-lg: 24px;
    --space-xl: 36px;
    --space-xxl: 50px;
  }
  
  .hero {
    padding: 60px var(--space-sm) 80px;
  }
  
  .hero.small {
    padding: 50px var(--space-sm) 40px;
  }
  
  .hero h1 {
    font-size: clamp(1.8rem, 6vw, 2.4rem);
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .worldwide,
  .ctaBox,
  .brevo-echo {
    padding: 35px var(--space-sm);
  }
  
  .worldwide-title {
    font-size: 1.8rem;
  }
  
  .navbar-content {
    padding: 0 var(--space-sm);
  }
  
  .close-actions,
  .worldwide-links,
  .global-links {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  
  .cta,
  .button,
  .btn {
    width: 100%;
    max-width: 320px;
  }
}

/* =========================================
   ACCESSIBILITY
========================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible para accesibilidad */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* =========================================
   UTILITY CLASSES
========================================= */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mb-sm { margin-bottom: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mb-md { margin-bottom: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }