/* ==========================================
   TU BIBLIOTECA VIRTUAL - MAIN STYLES
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700;900&family=DM+Sans:wght@300;400;500;600&display=swap');

/* ---- CSS VARIABLES ---- */
:root {
  /* Blue-Purple Palette */
  --c-primary: #6C63FF;
  --c-primary-dark: #4F46E5;
  --c-secondary: #A855F7;
  --c-accent: #818CF8;
  --c-gradient: linear-gradient(135deg, #6C63FF 0%, #A855F7 100%);
  --c-gradient-subtle: linear-gradient(135deg, rgba(108,99,255,0.15) 0%, rgba(168,85,247,0.15) 100%);

  /* Dark Theme (default) */
  --bg-base: #0D0B1E;
  --bg-surface: #13103A;
  --bg-card: rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.08);
  --bg-glass: rgba(19,16,58,0.8);
  --bg-input: rgba(255,255,255,0.06);
  --bg-overlay: rgba(0,0,0,0.7);

  --text-primary: #F0EEFF;
  --text-secondary: #A09DC5;
  --text-muted: #6B6890;
  --text-on-primary: #FFFFFF;

  --border-color: rgba(255,255,255,0.08);
  --border-active: rgba(108,99,255,0.6);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(108,99,255,0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);

  --blur-glass: blur(20px);
  --blur-overlay: blur(40px);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --header-h: 70px;
  --sidebar-w: 300px;
}

/* Light Theme */
[data-theme="light"] {
  --bg-base: #F4F3FF;
  --bg-surface: #FFFFFF;
  --bg-card: rgba(255,255,255,0.9);
  --bg-card-hover: rgba(255,255,255,1);
  --bg-glass: rgba(255,255,255,0.85);
  --bg-input: rgba(108,99,255,0.06);
  --bg-overlay: rgba(0,0,0,0.5);

  --text-primary: #1A1636;
  --text-secondary: #4B4880;
  --text-muted: #8884B0;
  --text-on-primary: #FFFFFF;

  --border-color: rgba(108,99,255,0.12);
  --border-active: rgba(108,99,255,0.5);

  --shadow-sm: 0 2px 8px rgba(108,99,255,0.08);
  --shadow-md: 0 4px 20px rgba(108,99,255,0.12);
  --shadow-lg: 0 8px 40px rgba(108,99,255,0.16);
  --shadow-glow: 0 0 30px rgba(108,99,255,0.2);
  --shadow-card: 0 4px 20px rgba(108,99,255,0.1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  transition: background 0.5s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(108,99,255,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 80%, rgba(168,85,247,0.1) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--c-primary); border-radius: 3px; }

/* ---- TYPOGRAPHY ---- */
h1, h2, h3 { font-family: 'Playfair Display', serif; line-height: 1.2; }

a { color: inherit; text-decoration: none; }

/* ---- HEADER ---- */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  flex-shrink: 0;
}

.logo-icon {
  width: 38px; height: 38px;
  background: var(--c-gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
}

.logo-link:hover .logo-icon { transform: rotate(-5deg) scale(1.05); }

.logo-text {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--c-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

/* Header Search */
.header-search {
  flex: 1;
  max-width: 600px;
  position: relative;
}

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-wrap svg {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  flex-shrink: 0;
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 10px 40px 10px 44px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

#search-input::placeholder { color: var(--text-muted); }
#search-input:focus {
  border-color: var(--c-primary);
  background: var(--bg-input);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}

.search-clear {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: none;
  transition: var(--transition-fast);
}
.search-clear:hover { color: var(--text-primary); }

/* Autocomplete */
#autocomplete-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
  display: none;
}

.autocomplete-item {
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  transition: var(--transition-fast);
}
.autocomplete-item:hover, .autocomplete-item.active {
  background: var(--bg-card-hover);
}
.autocomplete-item span { color: var(--text-muted); font-size: 0.75rem; }

/* Header Nav */
.header-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.nav-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card);
  border-color: var(--border-color);
}
.nav-btn.active {
  background: var(--c-gradient-subtle);
  border-color: var(--border-active);
  color: var(--c-primary);
}

.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
  flex-shrink: 0;
}
.theme-toggle:hover {
  background: var(--c-gradient);
  color: white;
  border-color: transparent;
  transform: rotate(20deg);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  color: var(--text-primary);
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile Nav */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  padding: 16px;
  flex-direction: column;
  gap: 8px;
  animation: slideDown 0.3s ease;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-btn { justify-content: flex-start; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- MAIN LAYOUT ---- */
#main {
  margin-top: var(--header-h);
  position: relative;
  z-index: 1;
}

/* ---- PAGE CONTAINERS ---- */
.page { display: none; }
.page.active { display: block; }

/* ---- HOME PAGE ---- */
#page-home {
  /* min-height removed: caused blank space below pagination */
}

/* Filters Bar */
.filters-section {
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  position: sticky;
  top: var(--header-h);
  z-index: 100;
}

.filters-top {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.filter-toggle-btn:hover, .filter-toggle-btn.active {
  background: var(--c-gradient-subtle);
  border-color: var(--border-active);
  color: var(--c-primary);
}

.sort-select {
  padding: 8px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236C63FF' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.sort-select:focus { border-color: var(--c-primary); }

.results-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-left: auto;
}
.results-count strong { color: var(--c-primary); }

.random-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--c-gradient);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(108,99,255,0.3);
  white-space: nowrap;
}
.random-btn:hover { transform: scale(1.05); box-shadow: var(--shadow-glow); }

/* Active Filters Chips */
.active-filters {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 10px;
  display: none;
}
.active-filters.visible { display: flex; }

.filter-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 12px;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  color: var(--c-accent);
}
.filter-chip button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-accent);
  display: flex; align-items: center;
  padding: 0;
  transition: var(--transition-fast);
}
.filter-chip button:hover { color: #EF4444; }

.clear-all-chip {
  padding: 4px 12px;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  color: #EF4444;
  cursor: pointer;
  background: none;
  font-family: 'DM Sans', sans-serif;
  transition: var(--transition-fast);
}
.clear-all-chip:hover { background: rgba(239,68,68,0.15); }

/* Advanced Filters Panel */
.advanced-filters {
  max-width: 1600px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-top: 12px;
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  animation: fadeInDown 0.3s ease;
}
.advanced-filters.open { display: grid; }

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.filter-group { display: flex; flex-direction: column; gap: 6px; }
.filter-group label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; }

.filter-select, .filter-input {
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition-fast);
  width: 100%;
  appearance: none;
}
.filter-select:focus, .filter-input:focus { border-color: var(--c-primary); }

.filter-actions {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.btn-apply {
  padding: 8px 20px;
  background: var(--c-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-apply:hover { opacity: 0.9; transform: scale(1.02); }

.btn-clear {
  padding: 8px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.btn-clear:hover { color: #EF4444; border-color: rgba(239,68,68,0.4); }

/* ---- BOOKS GRID ---- */
.books-section {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

/* Skeleton */
.skeleton-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: pulse 1.5s ease-in-out infinite;
}
.skeleton-cover {
  width: 100%; aspect-ratio: 2/3;
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
.skeleton-body { padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.skeleton-line {
  height: 12px;
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}
.skeleton-line.short { width: 60%; }

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.7; } }

/* Book Card */
.book-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
}
.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.book-cover-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 2/3;
  background: var(--bg-surface);
}

.book-cover {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.book-card:hover .book-cover { transform: scale(1.05); }

.book-badge-new {
  position: absolute;
  top: 10px; left: 10px;
  background: linear-gradient(135deg, #F59E0B, #EF4444);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  box-shadow: 0 2px 8px rgba(239,68,68,0.4);
  animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
  0%,100% { box-shadow: 0 2px 8px rgba(239,68,68,0.4); }
  50% { box-shadow: 0 2px 16px rgba(239,68,68,0.7); }
}

.book-rating-badge {
  position: absolute;
  top: 10px; right: 10px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  color: #FCD34D;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 3px;
}

.book-fav-btn {
  position: absolute;
  bottom: 10px; right: 10px;
  width: 32px; height: 32px;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  border: none;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: white;
  opacity: 0;
}
.book-card:hover .book-fav-btn { opacity: 1; }
.book-fav-btn.active { color: #EF4444; opacity: 1; }
.book-fav-btn:hover { background: rgba(239,68,68,0.6); transform: scale(1.1); }

/* Quick View Button */
.book-quick-view {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  padding: 20px 12px 12px;
  display: flex;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.book-card:hover .book-quick-view { opacity: 1; }
.quick-view-btn {
  padding: 6px 14px;
  background: rgba(108,99,255,0.9);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.quick-view-btn:hover { background: var(--c-primary); }

.book-info {
  padding: 12px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.book-title {
  font-family: 'Playfair Display', serif;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  flex: 1;
}

.book-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 6px;
}

.stars-inline {
  display: flex;
  align-items: center;
  gap: 1px;
  color: #FCD34D;
}

/* ---- PAGINATION ---- */
.pagination-wrap {
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.page-btn {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 0.9rem;
}
.page-btn:hover:not(:disabled) {
  background: var(--c-gradient);
  border-color: transparent;
  color: white;
}
.page-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.page-indicator {
  padding: 8px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--c-primary);
  cursor: pointer;
  transition: var(--transition-fast);
  font-family: 'DM Sans', sans-serif;
}
.page-indicator:hover { background: var(--c-gradient-subtle); }

/* ---- MODALS ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(20px);
  transition: var(--transition);
  position: relative;
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  z-index: 10;
}
.modal-close:hover { background: #EF4444; color: white; border-color: transparent; }

/* Book Detail Modal */
.book-modal-content {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
}

.book-modal-cover-side {
  padding: 24px;
  background: var(--c-gradient-subtle);
  border-radius: var(--radius-xl) 0 0 var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.book-modal-cover {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  aspect-ratio: 2/3;
}

.book-modal-actions { width: 100%; display: flex; flex-direction: column; gap: 8px; }

.dl-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  width: 100%;
  justify-content: flex-start;
}
.dl-btn:hover {
  background: var(--c-gradient-subtle);
  border-color: var(--border-active);
  color: var(--c-primary);
}
.dl-btn.primary {
  background: var(--c-gradient);
  border-color: transparent;
  color: white;
  justify-content: center;
}
.dl-btn.primary:hover { opacity: 0.9; transform: scale(1.01); }
.dl-btn svg { flex-shrink: 0; }

.book-modal-info-side { padding: 28px 28px 28px 24px; }

.book-modal-title {
  font-size: 1.6rem;
  margin-bottom: 8px;
  line-height: 1.2;
}

.book-modal-author {
  font-size: 0.95rem;
  color: var(--c-secondary);
  margin-bottom: 12px;
  cursor: pointer;
}
.book-modal-author:hover { text-decoration: underline; }

.book-modal-stars {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
}

.book-modal-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--border-color);
}

.meta-item { display: flex; flex-direction: column; gap: 2px; }
.meta-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.meta-value { font-size: 0.88rem; font-weight: 500; }

.book-modal-sinopsis { margin-bottom: 20px; }
.book-modal-sinopsis h3 { font-size: 1rem; margin-bottom: 8px; }
.book-modal-sinopsis p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* Stars Component */
.stars-display {
  display: flex;
  align-items: center;
  gap: 2px;
}
.star-full { color: #FCD34D; }
.star-half { color: #FCD34D; }
.star-empty { color: var(--text-muted); }

/* Page Selector Modal */
.page-modal { max-width: 400px; padding: 24px; }
.page-modal h3 { font-size: 1.1rem; margin-bottom: 16px; }
.pages-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.page-number-btn {
  padding: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  transition: var(--transition-fast);
  text-align: center;
}
.page-number-btn:hover { background: var(--c-gradient-subtle); border-color: var(--border-active); }
.page-number-btn.current { background: var(--c-gradient); border-color: transparent; color: white; }

/* Quick View Modal */
.quick-modal { max-width: 600px; padding: 24px; }
.quick-modal-inner { display: flex; gap: 20px; }
.quick-modal-cover { width: 120px; flex-shrink: 0; border-radius: var(--radius-md); object-fit: cover; aspect-ratio: 2/3; }
.quick-modal-info { flex: 1; }
.quick-modal-info h2 { font-size: 1.2rem; margin-bottom: 6px; }
.quick-modal-sinopsis {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 10px 0;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.quick-modal-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.quick-btn {
  padding: 7px 14px;
  background: var(--c-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.quick-btn:hover { opacity: 0.9; }
.quick-btn.secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}
.quick-btn.secondary:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ---- FAB SCROLL TOP ---- */
#fab-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--c-gradient);
  border: none;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  z-index: 900;
  transition: var(--transition);
  color: white;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}
#fab-top.visible { opacity: 1; pointer-events: all; transform: translateY(0); }
#fab-top:hover { transform: translateY(-4px) scale(1.05); }

/* ---- FAVORITES PAGE ---- */
#page-favorites .page-header,
#page-stats .page-header,
#page-author .page-header,
#page-lists .page-header {
  padding: 40px 24px 20px;
  max-width: 1600px;
  margin: 0 auto;
}
#page-favorites .page-header h1,
#page-stats .page-header h1,
#page-author .page-header h1,
#page-lists .page-header h1 {
  font-size: 2rem;
  background: var(--c-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- STATS PAGE ---- */
.stats-grid {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px 40px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}
.stat-card:hover { border-color: var(--border-active); transform: translateY(-2px); }

.stat-icon {
  width: 44px; height: 44px;
  background: var(--c-gradient);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: white;
}
.stat-value { font-size: 1.8rem; font-weight: 700; background: var(--c-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.82rem; color: var(--text-muted); }

/* ---- AUTHOR PAGE ---- */
.author-profile {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.author-hero {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.author-photo {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid transparent;
  background: var(--c-gradient);
  background-clip: padding-box;
  flex-shrink: 0;
}

.author-bio { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; margin-top: 8px; }
.author-name { font-size: 1.6rem; }
.author-country { font-size: 0.85rem; color: var(--c-secondary); margin-top: 4px; }

/* ---- LISTS PAGE ---- */
.lists-content {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.list-actions { display: flex; gap: 12px; margin-bottom: 24px; }

.btn-new-list {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--c-gradient);
  border: none;
  border-radius: var(--radius-full);
  color: white;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-new-list:hover { opacity: 0.9; transform: scale(1.02); }

.user-lists { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }

.user-list-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}
.user-list-card:hover { border-color: var(--border-active); }

.list-name { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.list-count { font-size: 0.78rem; color: var(--text-muted); }

/* ---- PDF VIEWER ---- */
#page-viewer {
  height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
}
.viewer-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-color);
}
.viewer-toolbar button {
  padding: 6px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  transition: var(--transition-fast);
  display: flex; align-items: center; gap: 6px;
}
.viewer-toolbar button:hover { background: var(--c-gradient-subtle); border-color: var(--border-active); }
#viewer-frame {
  flex: 1;
  width: 100%;
  border: none;
  background: #1a1a2e;
}

/* ---- RECOMMENDATIONS ---- */
.recommendations {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 24px 32px;
}
.recommendations h2 { font-size: 1.4rem; margin-bottom: 16px; }
.recs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }

/* ---- EXPORT BTN ---- */
.export-btn {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex; align-items: center; gap: 6px;
}
.export-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }

/* ---- TOAST ---- */
#toast {
  position: fixed;
  bottom: 90px; right: 32px;
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 0.875rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  transform: translateY(20px);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
#toast.show { transform: translateY(0); opacity: 1; }
#toast .toast-icon { color: var(--c-primary); }

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); }
}

@media (max-width: 768px) {
  .header-search { display: none; }
  .hamburger { display: flex; }
  .header-nav { display: none; }

  .books-grid { grid-template-columns: repeat(auto-fill, minmax(145px, 1fr)); gap: 12px; }
  .books-section { padding: 16px; }

  .book-modal-content { grid-template-columns: 1fr; }
  .book-modal-cover-side { border-radius: var(--radius-xl) var(--radius-xl) 0 0; }
  .book-modal-cover { max-width: 180px; }

  .quick-modal-inner { flex-direction: column; }

  .filters-top { gap: 8px; }

  .logo-text { display: none; }
}

@media (max-width: 480px) {
  .books-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-card { padding: 14px; }
  .modal { border-radius: var(--radius-lg); }
}

/* ---- SWIPE SUPPORT ---- */
.touch-swipe { touch-action: pan-y; }

/* ---- NO RESULTS ---- */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}
.empty-state svg { margin-bottom: 16px; color: var(--text-muted); opacity: 0.4; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 8px; }

/* ---- LISTAS INPUT MODAL ---- */
.list-modal { max-width: 400px; padding: 28px; }
.list-modal h3 { margin-bottom: 16px; }
.list-modal input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  outline: none;
  margin-bottom: 12px;
}
.list-modal input:focus { border-color: var(--c-primary); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---- FOOTER ---- */
#site-footer {
  background: var(--bg-glass);
  backdrop-filter: var(--blur-glass);
  border-top: 1px solid var(--border-color);
  position: relative;
  z-index: 10;
}

.footer-inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.footer-logo {
  width: 32px; height: 32px;
  background: var(--c-gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.footer-name {
  font-family: 'Playfair Display', serif;
  font-size: 0.95rem;
  font-weight: 700;
  background: var(--c-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.footer-link {
  padding: 5px 12px;
  background: none;
  border: none;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition-fast);
}
.footer-link:hover {
  color: var(--c-primary);
  background: var(--bg-card);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}