/* ==========================================================================
   Tus Fotos a Libro — Design System & CSS 3D Interactive Engine (Argentina)
   Aceleración por Hardware · Mobile First · 60 FPS
   ========================================================================== */

:root {
  --bg: #F8F5F0;
  --bg-alt: #F2ECE1;
  --card-bg: #FFFFFF;
  --text-main: #1A1816;
  --text-muted: #5C554E;
  --text-light: #8C827A;
  --border: #E5DEC9;
  --border-dark: #C9BEA7;
  
  /* Paleta Editorial Premium */
  --terracotta: #A34828;
  --terracotta-dark: #7A331A;
  --terracotta-light: #FBF0EB;
  --gold: #C59A45;
  --gold-light: #FDF8ED;
  --green: #1E7E34;
  --green-light: #EBF7EE;
  --red-alert: #C92A2A;
  --red-light: #FDE8E8;
  
  --shadow-sm: 0 2px 8px rgba(26, 24, 22, 0.05);
  --shadow-md: 0 8px 24px rgba(26, 24, 22, 0.08);
  --shadow-lg: 0 20px 50px rgba(26, 24, 22, 0.12);
  --shadow-book: 0 25px 60px rgba(26, 24, 22, 0.22);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-handwriting: 'Playfair Display', cursive, serif;
  
  --max-w: 1140px;
}

/* Reset y Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg);
  color: var(--text-main);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Tipografía */
h1, h2, h3, h4, .serif {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
}

p {
  color: var(--text-muted);
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--terracotta-light);
  color: var(--terracotta-dark);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
  border: 1px solid rgba(163, 72, 40, 0.15);
}

.section-tag.gold {
  background: var(--gold-light);
  color: #8C6819;
  border-color: rgba(197, 154, 69, 0.25);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-header h2 {
  font-size: 2.3rem;
  margin-bottom: 14px;
}

.section-header p {
  font-size: 1.05rem;
}

/* Barra Superior */
.top-banner {
  background: var(--terracotta-dark);
  color: #FFFFFF;
  text-align: center;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.top-banner strong {
  color: var(--gold);
}

/* Navegación */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 245, 240, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
  line-height: 1;
}

.logo span, .logo .logo-serif {
  color: var(--terracotta);
  font-style: italic;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 22px);
  white-space: nowrap;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
}

.nav-link:hover {
  color: var(--terracotta);
}

.nav-link-pill {
  background: var(--gold-light);
  color: #8C6819 !important;
  border: 1px solid rgba(197, 154, 69, 0.35);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.nav-link-pill:hover {
  background: #FDF1D6;
  border-color: var(--gold);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(197, 154, 69, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--terracotta);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(163, 72, 40, 0.3);
}

.btn-primary:hover {
  background: var(--terracotta-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(163, 72, 40, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-dark);
}

.btn-outline:hover {
  background: #FFFFFF;
  border-color: var(--text-main);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.86rem;
}

/* Hero Section */
.hero {
  padding: 60px 0 50px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.hero-text {
  text-align: left;
}

.hero-workshop-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(163, 72, 40, 0.07);
  border: 1px solid rgba(163, 72, 40, 0.2);
  color: var(--terracotta);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero-workshop-badge .workshop-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--terracotta);
  display: inline-block;
}

.hero h1 {
  font-size: 3.1rem;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  line-height: 1.15;
}

.hero h1 span.highlight {
  color: var(--terracotta);
  font-style: italic;
  position: relative;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.hero-guarantees {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 7px;
}

.guarantee-item svg {
  color: var(--green);
  flex-shrink: 0;
}

/* Hero Visual & Mockup */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mockup-container {
  position: relative;
  width: 100%;
  max-width: 440px;
}

.hero-book-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(163, 72, 40, 0.18), 0 10px 25px rgba(26, 24, 22, 0.1);
  border: 1px solid rgba(229, 222, 201, 0.8);
  background: #FFFFFF;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.hero-book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 70px rgba(163, 72, 40, 0.22), 0 15px 35px rgba(26, 24, 22, 0.12);
}

.hero-book-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
}

.hero-book-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26, 24, 22, 0) 35%, rgba(26, 24, 22, 0.88) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: #FFFFFF;
}

.hero-book-overlay h4 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: #FFFFFF;
  margin-bottom: 6px;
  font-weight: 700;
}

.hero-book-overlay p {
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 0;
}

.floating-pill {
  position: absolute;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: var(--radius-full);
  box-shadow: 0 12px 30px rgba(26, 24, 22, 0.12);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: floatSubtle 4s ease-in-out infinite;
}

.floating-pill.top-right {
  top: -14px;
  right: -14px;
  animation-delay: 0s;
}

.floating-pill.bottom-left {
  bottom: -16px;
  left: -14px;
  animation-delay: 2s;
}

.floating-pill .pill-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: var(--terracotta-light);
  color: var(--terracotta);
}

.floating-pill .pill-text {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.floating-pill .pill-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
}

@keyframes floatSubtle {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   Interactive 3D Book Experience (Hardware Accelerated CSS 3D)
   ========================================================================== */
.book-showcase-section {
  padding: 50px 0 70px;
  position: relative;
}

.book-viewport {
  perspective: 1800px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 480px;
  margin: 20px 0;
  position: relative;
}

.book-wrapper {
  position: relative;
  width: 680px;
  height: 420px;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.book-shadow {
  position: absolute;
  width: 96%;
  height: 30px;
  bottom: -35px;
  left: 2%;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0) 75%);
  filter: blur(10px);
  pointer-events: none;
  transform: translateZ(-50px);
}

.book-spine-hinge {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 14px;
  transform: translateX(-50%);
  background: linear-gradient(to right, rgba(0,0,0,0.22), rgba(0,0,0,0.05), rgba(0,0,0,0.22));
  z-index: 25;
  pointer-events: none;
}

.page-left {
  position: absolute;
  left: 0;
  top: 0;
  width: 50%;
  height: 100%;
  background: #FFFDF9;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  box-shadow: inset -15px 0 25px rgba(0,0,0,0.05), -5px 5px 25px rgba(0,0,0,0.15);
  border: 1px solid var(--border);
  border-right: none;
  overflow: hidden;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.page-right-base {
  position: absolute;
  right: 0;
  top: 0;
  width: 50%;
  height: 100%;
  background: #FFFDF9;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  box-shadow: inset 15px 0 25px rgba(0,0,0,0.05), 5px 5px 25px rgba(0,0,0,0.15);
  border: 1px solid var(--border);
  border-left: none;
  overflow: hidden;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.page-flipper {
  position: absolute;
  right: 0;
  top: 0;
  width: 50%;
  height: 100%;
  transform-origin: left center;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 20;
  will-change: transform;
}

.flipper-front {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #FFFDF9;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  border: 1px solid var(--border);
  border-left: none;
  padding: 24px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: inset 10px 0 20px rgba(0,0,0,0.04);
}

.flipper-back {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #FFFDF9;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border: 1px solid var(--border);
  border-right: none;
  padding: 24px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  box-shadow: inset -10px 0 20px rgba(0,0,0,0.04);
}

.flipper-front::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.15), rgba(0,0,0,0) 30%);
  pointer-events: none;
}

.flipper-back::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to left, rgba(0,0,0,0.15), rgba(0,0,0,0) 30%);
  pointer-events: none;
}

.photo-frame {
  position: relative;
  width: 100%;
  height: 72%;
  border-radius: 4px;
  overflow: hidden;
  background: #EAE6DF;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  height: 72%;
}

.photo-grid-2 .photo-frame {
  height: 100%;
}

.page-caption {
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: 0.92rem;
  font-style: italic;
  color: #383431;
  line-height: 1.4;
}

.page-date {
  display: block;
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-top: 4px;
}

.page-number {
  position: absolute;
  bottom: 10px;
  font-size: 0.72rem;
  color: var(--text-light);
  font-weight: 600;
}

.page-left .page-number { left: 24px; }
.page-right-base .page-number, .flipper-front .page-number { right: 24px; }

.book-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 35px;
}

.book-control-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-dark);
  color: var(--text-main);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.book-control-btn:hover:not(:disabled) {
  background: var(--terracotta-light);
  color: var(--terracotta-dark);
  border-color: var(--terracotta);
}

.book-control-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-indicator {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 110px;
  text-align: center;
}

.scroll-hint {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ==========================================================================
   SECCIÓN: Anatomía del Libro de Lujo (Tapa, Lomo, Guardas, Páginas)
   ========================================================================== */
.anatomy-section {
  padding: 80px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
}

.anatomy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.anatomy-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: left;
  transition: transform 0.2s;
}

.anatomy-card:hover {
  transform: translateY(-3px);
  border-color: var(--terracotta);
}

.anatomy-icon {
  width: 44px;
  height: 44px;
  background: var(--terracotta-light);
  color: var(--terracotta);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.anatomy-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.anatomy-card p {
  font-size: 0.86rem;
  line-height: 1.5;
}

/* ==========================================================================
   SECCIÓN: Dedicatoria con Firma Manuscrita Real (Feature Exclusiva)
   ========================================================================== */
.signature-feature-section {
  padding: 80px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.signature-studio-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .signature-studio-grid {
    grid-template-columns: 1fr;
  }
}

.signature-editor-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.dedication-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.dedication-chip {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.dedication-chip:hover, .dedication-chip.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary);
  font-weight: 600;
}

.dedication-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-main);
  background: #FFFDF9;
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.dedication-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(156, 66, 33, 0.1);
}

.signature-canvas-wrapper {
  position: relative;
  background: #FFFDF9;
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-sm);
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
}

#signaturePad {
  display: block;
  width: 100%;
  height: 170px;
  touch-action: none;
}

.signature-placeholder-guide {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-light);
  font-size: 0.88rem;
  pointer-events: none;
  transition: opacity 0.2s;
}

.signature-placeholder-guide.hidden {
  opacity: 0;
}

.signature-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.ink-color-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid #FFFFFF;
  box-shadow: 0 0 0 1px var(--border);
  cursor: pointer;
  transition: transform 0.15s;
}

.color-btn.active {
  box-shadow: 0 0 0 2px var(--primary);
  transform: scale(1.15);
}

.signature-preview-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 2px solid var(--gold);
  padding: 30px 26px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.signature-book-page {
  background: #FFFDF9;
  border: 1px solid #EAE5DE;
  border-radius: var(--radius-sm);
  padding: 34px 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: inset 0 0 25px rgba(0,0,0,0.03), 0 4px 15px rgba(0,0,0,0.04);
  min-height: 270px;
  position: relative;
}

.page-ornament {
  font-size: 1.5rem;
  color: var(--gold);
  margin-bottom: 12px;
  line-height: 1;
}

.signature-handwritten-text {
  font-family: 'Playfair Display', cursive, serif;
  font-style: italic;
  font-size: 1.35rem;
  color: #1A1816;
  line-height: 1.55;
  margin-bottom: 16px;
  max-width: 90%;
}

.signature-live-render {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 8px 0;
}

.signature-placeholder-stamp {
  font-size: 0.85rem;
  color: var(--text-light);
  border: 1px dashed var(--border);
  padding: 8px 16px;
  border-radius: 4px;
  font-style: italic;
}

.signature-page-footer {
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-top: auto;
  padding-top: 16px;
}

/* ==========================================================================
   SECCIÓN: Colecciones y Ediciones Temáticas
   ========================================================================== */
.thematic-section {
  padding: 90px 0;
}

.thematic-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.thematic-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.thematic-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--terracotta);
}

.thematic-img-box {
  height: 200px;
  overflow: hidden;
  position: relative;
}

.thematic-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.thematic-card:hover .thematic-img-box img {
  transform: scale(1.05);
}

.thematic-tag {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(26, 24, 22, 0.85);
  backdrop-filter: blur(4px);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.thematic-body {
  padding: 24px 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.thematic-body h4 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.thematic-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.thematic-cta {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--terracotta);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   Selector de Variedades y Catálogo
   ========================================================================== */
.pricing-section {
  padding: 90px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.pricing-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-dark);
}

.pricing-card.featured {
  border: 2px solid var(--terracotta);
  box-shadow: var(--shadow-md);
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--terracotta);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: var(--radius-full);
}

.card-title {
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.card-size {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.card-price-box {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.card-old-price {
  text-decoration: line-through;
  font-size: 0.95rem;
  color: var(--text-light);
  margin-right: 8px;
}

.card-price {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-main);
  font-family: var(--font-serif);
}

.card-price-currency {
  font-size: 1rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.card-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.card-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.card-features li svg {
  color: var(--green);
  flex-shrink: 0;
  margin-top: 3px;
}

.abuela-upsell-box {
  max-width: 740px;
  margin: 0 auto;
  background: var(--card-bg);
  border: 2px dashed var(--gold);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}

.upsell-info h4 {
  font-size: 1.2rem;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.upsell-info p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.upsell-toggle-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  background: var(--gold-light);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(197, 154, 69, 0.3);
  font-weight: 700;
  font-size: 0.92rem;
  color: #7A5810;
  flex-shrink: 0;
}

.upsell-toggle-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--terracotta);
  cursor: pointer;
}

/* ==========================================================================
   Preflight Interactivo de Fotos
   ========================================================================== */
.preflight-section {
  padding: 90px 0;
}

.preflight-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.dropzone-box {
  background: #FFFFFF;
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.dropzone-box:hover, .dropzone-box.dragover {
  border-color: var(--terracotta);
  background: var(--terracotta-light);
}

.dropzone-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  color: var(--terracotta);
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.dropzone-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.file-input-hidden {
  display: none;
}

.preflight-result {
  margin-top: 20px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: #F9F9F8;
  border: 1px solid var(--border);
  display: none;
}

.preflight-result.visible {
  display: block;
  animation: fadeIn 0.3s ease;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.badge-status {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
}

.badge-status.good {
  background: var(--green-light);
  color: var(--green);
}

.badge-status.warning {
  background: #FFF3CD;
  color: #856404;
}

.badge-status.bad {
  background: var(--red-light);
  color: var(--red-alert);
}

.result-detail {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.rules-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.rules-card h3 {
  font-size: 1.35rem;
  margin-bottom: 16px;
}

.rule-item {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
}

.rule-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.rule-icon.check { color: var(--green); }
.rule-icon.cross { color: var(--red-alert); }

.rule-text h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 3px;
}

.rule-text p {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.legal-notice-box {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-top: 24px;
}

.legal-notice-box h5 {
  color: var(--red-alert);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.legal-notice-box p {
  font-size: 0.82rem;
  color: #991B1B;
  line-height: 1.4;
}

/* ==========================================================================
   Checkout Modal
   ========================================================================== */
.checkout-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 24, 22, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.checkout-modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Ocultar botón flotante de WhatsApp cuando el checkout está abierto */
.checkout-modal-overlay.active ~ .btn-floating-whatsapp,
body.modal-open .btn-floating-whatsapp {
  opacity: 0 !important;
  pointer-events: none !important;
  visibility: hidden !important;
  transform: scale(0.8) translateY(12px) !important;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease !important;
}

.checkout-modal {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  max-width: 620px;
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.checkout-modal-overlay.active .checkout-modal {
  transform: translateY(0);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-light);
  cursor: pointer;
}

.modal-title {
  font-size: 1.6rem;
  margin-bottom: 6px;
}

.modal-subtitle {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.payment-selector {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.payment-option-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.payment-option-card.selected {
  border-color: var(--terracotta);
  background: var(--terracotta-light);
}

.payment-option-card .tag-discount {
  position: absolute;
  top: -9px;
  right: 10px;
  background: var(--green);
  color: #FFFFFF;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.payment-option-card h5 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.payment-option-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.alias-box {
  background: #F8F9FA;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 20px;
  display: none;
}

.alias-box.visible {
  display: block;
}

.alias-code {
  font-family: monospace;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--terracotta-dark);
  background: #FFFFFF;
  padding: 6px 10px;
  border-radius: 4px;
  border: 1px solid var(--border);
  display: inline-block;
  margin-top: 6px;
}

.order-summary-box {
  background: #FBF9F6;
  border-radius: var(--radius-sm);
  padding: 18px;
  margin-bottom: 24px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.summary-row.total {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  border-top: 1px solid var(--border);
  padding-top: 10px;
  margin-top: 10px;
  margin-bottom: 0;
}

.legal-declaration-box {
  background: #FEF9EE;
  border: 1px solid #F5E5C9;
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.checkbox-legal-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.84rem;
  color: #4A3A21;
  line-height: 1.45;
  cursor: pointer;
}

.checkbox-legal-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--terracotta);
  flex-shrink: 0;
  margin-top: 2px;
}

.checkbox-legal-label a {
  color: var(--terracotta);
  font-weight: 700;
  text-decoration: underline;
}

/* Footer */
footer.main-footer {
  background: #1A1816;
  color: #A8A29E;
  padding: 60px 0 30px;
  font-size: 0.88rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 40px;
  border-bottom: 1px solid #292524;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: #FFFFFF;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  text-align: center;
  margin-top: 30px;
  font-size: 0.78rem;
  color: #78716C;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Sección Comparativa: Nosotros vs. Imprentas Tradicionales
   ========================================================================== */
.comparison-section {
  padding: 90px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 32px;
  max-width: 980px;
  margin: 0 auto;
  align-items: stretch;
}

.comparison-card {
  padding: 38px 32px;
  border-radius: var(--radius-md);
  background: var(--bg);
  border: 1px solid var(--border);
  position: relative;
  display: flex;
  flex-direction: column;
}

.comparison-card.recommended {
  background: #FFFFFF;
  border: 2px solid var(--terracotta);
  box-shadow: 0 16px 40px rgba(163, 72, 40, 0.12);
  transform: scale(1.02);
}

.recommended-pill {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--terracotta);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(163, 72, 40, 0.35);
  white-space: nowrap;
}

.comparison-card h3 {
  font-size: 1.45rem;
  margin-bottom: 6px;
}

.comparison-card .card-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.comparison-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex-grow: 1;
}

.comparison-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.94rem;
  line-height: 1.45;
}

.comparison-item .item-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.comparison-item.negative .item-icon {
  background: #FEE2E2;
  color: #DC2626;
}

.comparison-item.positive .item-icon {
  background: #DCFCE7;
  color: #16A34A;
}

.comparison-footer-text {
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
  font-style: italic;
  margin-bottom: 0;
}

/* ==========================================================================
   Sección de Testimonios y Prueba Social (Argentina)
   ========================================================================== */
.testimonials-section {
  padding: 90px 0;
  background: var(--bg);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 32px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonial-stars {
  color: #F59E0B;
  font-size: 1.05rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-main);
  font-style: italic;
  margin-bottom: 22px;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.author-info h5 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.author-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.verified-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 700;
  margin-top: 2px;
}

/* ==========================================================================
   Sección de Preguntas Frecuentes (Acordeón Interactivo)
   ========================================================================== */
.faq-section {
  padding: 85px 0;
  background: #FFFFFF;
  border-top: 1px solid var(--border);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.faq-item.active {
  border-color: var(--terracotta);
  background: #FFFFFF;
  box-shadow: 0 4px 16px rgba(163, 72, 40, 0.08);
}

.faq-question {
  width: 100%;
  padding: 20px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  font-family: inherit;
}

.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--terracotta);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--terracotta);
  color: #FFFFFF;
  border-color: var(--terracotta);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  max-height: 350px;
  padding: 0 22px 22px;
}

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .hero-text {
    text-align: center;
  }
  .hero-workshop-badge, .hero-actions, .hero-guarantees {
    justify-content: center;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero p.lead {
    font-size: 1.05rem;
  }
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .comparison-card.recommended {
    transform: none;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .book-viewport {
    perspective: 1200px;
    min-height: 380px;
  }
  .book-wrapper {
    width: 340px;
    height: 300px;
    transform: scale(0.9);
  }
  .page-left, .page-right-base, .page-flipper {
    padding: 14px;
  }
  .page-caption {
    font-size: 0.78rem;
  }
  .anatomy-grid {
    grid-template-columns: 1fr 1fr;
  }
  .signature-box {
    grid-template-columns: 1fr;
    padding: 28px 20px;
  }
  .thematic-grid {
    grid-template-columns: 1fr;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .abuela-upsell-box {
    flex-direction: column;
    text-align: center;
  }
  .preflight-container {
    grid-template-columns: 1fr;
  }
  .payment-selector {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 18px;
    padding: 0;
  }
}

@media (max-width: 1080px) {
  .nav-link.nav-secondary {
    display: none;
  }
}

@media (max-width: 840px) {
  .nav-links {
    display: none;
  }
  .logo {
    font-size: 1.3rem;
  }
  .btn-sm {
    padding: 8px 14px;
    font-size: 0.82rem;
  }
}

/* ==========================================================================
   Botón Flotante Oficial de WhatsApp (Canal Directo de Atención de Taller)
   ========================================================================== */
.btn-floating-whatsapp {
  position: fixed;
  bottom: clamp(32px, 4.5vh, 48px);
  bottom: max(clamp(32px, 4.5vh, 48px), env(safe-area-inset-bottom, 32px));
  right: clamp(20px, 3vw, 36px);
  right: max(clamp(20px, 3vw, 36px), env(safe-area-inset-right, 20px));
  z-index: 999999;
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: #25D366;
  color: #FFFFFF !important;
  text-decoration: none;
  border-radius: 9999px;
  padding: 12px 18px 12px 14px;
  box-shadow: 0 8px 30px rgba(37, 211, 102, 0.45), 0 3px 12px rgba(0, 0, 0, 0.16);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, background-color 0.2s ease;
  backdrop-filter: blur(6px);
  -webkit-tap-highlight-color: transparent;
}

.btn-floating-whatsapp:hover {
  background-color: #20BA5A;
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 12px 35px rgba(37, 211, 102, 0.6), 0 6px 16px rgba(0, 0, 0, 0.2);
  color: #FFFFFF !important;
}

.btn-floating-whatsapp:active {
  transform: translateY(-1px) scale(0.97);
}

.btn-floating-whatsapp svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
  flex-shrink: 0;
}

.btn-floating-whatsapp .wa-label {
  display: inline-block;
  line-height: 1.2;
}

.btn-floating-whatsapp .wa-sub {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.92;
}

@media (max-width: 640px) {
  .btn-floating-whatsapp {
    bottom: clamp(24px, 4vh, 32px);
    bottom: max(clamp(24px, 4vh, 32px), env(safe-area-inset-bottom, 24px));
    right: 18px;
    padding: 14px;
    border-radius: 50%;
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.5), 0 3px 10px rgba(0, 0, 0, 0.2);
  }
  .btn-floating-whatsapp .wa-label {
    display: none;
  }
}