/* ==========================================================================
   WHY MENTOR MATTERS? — Flagship Mobile-First Design System
   Optimized for Cloudflare Pages (Ultra Fast, Zero Dependencies, Zero Overflow)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700;800;900&family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Premium Dark Executive Palette */
  --bg-dark: #050A18;
  --bg-dark-surface: #0B132B;
  --bg-dark-card: rgba(14, 22, 48, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-elevated: rgba(255, 255, 255, 0.08);
  
  --border-gold: rgba(212, 175, 55, 0.35);
  --border-subtle: rgba(255, 255, 255, 0.09);
  
  --primary-gold: #D4AF37;
  --primary-gold-light: #F8E7A2;
  --primary-gold-bright: #FFDF00;
  --primary-gold-dark: #9E7D17;
  --primary-gold-glow: rgba(212, 175, 55, 0.4);

  --accent-emerald: #10B981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.3);
  --accent-amazon: #FF9900;
  --accent-amazon-hover: #FFAC33;

  --text-main: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;

  /* Typography */
  --font-serif: 'Cinzel', serif;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Smooth Transitions */
  --tr-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --tr-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --tr-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-gold: 0 12px 35px -8px rgba(212, 175, 55, 0.45);
  --shadow-amazon: 0 12px 30px -8px rgba(255, 153, 0, 0.45);
  --shadow-card: 0 20px 50px -10px rgba(0, 0, 0, 0.7);
}

/* Base & Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100vw;
  position: relative;
  min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #050A18;
}
::-webkit-scrollbar-thumb {
  background: var(--primary-gold-dark);
  border-radius: 4px;
}

/* Ambient Radial Glow Background */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-circle-1 {
  position: absolute;
  top: -10%;
  left: 20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, transparent 70%);
  filter: blur(80px);
  animation: pulseGlow 10s ease-in-out infinite alternate;
}

.glow-circle-2 {
  position: absolute;
  top: 50%;
  right: -10%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
  filter: blur(90px);
  animation: pulseGlow 14s ease-in-out infinite alternate-reverse;
}

@keyframes pulseGlow {
  0% { transform: scale(1) translate(0, 0); opacity: 0.6; }
  100% { transform: scale(1.15) translate(20px, 30px); opacity: 0.9; }
}

/* Particle Canvas */
#particleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

/* Top Announcement Ticker Bar */
.top-ticker {
  background: linear-gradient(90deg, #050A18 0%, #111D3B 50%, #050A18 100%);
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
  color: var(--primary-gold-light);
  font-size: 0.78rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 7px 12px;
  text-align: center;
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.ticker-tag {
  background: rgba(212, 175, 55, 0.2);
  color: var(--primary-gold-bright);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}

/* Executive Header */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(5, 10, 24, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--tr-normal);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
  transition: transform var(--tr-fast);
}

.brand-logo-img:hover {
  transform: scale(1.02);
}

.brand-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-gold) 0%, var(--primary-gold-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 900;
  color: #050A18;
  font-size: 1.15rem;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.35);
}

.brand-text {
  min-width: 0;
}

.brand-text h1 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: 0.5px;
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text span {
  font-family: var(--font-display);
  font-size: 0.68rem;
  color: var(--primary-gold);
  font-weight: 600;
  letter-spacing: 1px;
  display: block;
}

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

/* Common Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 50px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.92rem;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--tr-normal);
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-amazon {
  background: linear-gradient(135deg, #FFB834 0%, #FF9900 60%, #E68000 100%);
  color: #111111;
  font-weight: 800;
  box-shadow: var(--shadow-amazon);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-amazon:hover, .btn-amazon:active {
  transform: translateY(-2px);
  box-shadow: 0 16px 35px -5px rgba(255, 153, 0, 0.6);
  background: linear-gradient(135deg, #FFCA65 0%, #FFAC33 60%, #FF9900 100%);
}

.btn-gold {
  background: linear-gradient(135deg, #F8E7A2 0%, var(--primary-gold) 50%, #9E7D17 100%);
  color: #050A18;
  font-weight: 800;
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover, .btn-gold:active {
  transform: translateY(-2px);
  box-shadow: 0 16px 35px -5px rgba(212, 175, 55, 0.6);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-gold);
  color: #FFFFFF;
  backdrop-filter: blur(10px);
}

.btn-glass:hover, .btn-glass:active {
  background: rgba(212, 175, 55, 0.15);
  border-color: var(--primary-gold-bright);
  color: var(--primary-gold-light);
}

.btn-whatsapp {
  background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
  color: #FFFFFF;
  font-weight: 800;
  box-shadow: 0 10px 25px -5px rgba(37, 211, 102, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-whatsapp:hover, .btn-whatsapp:active {
  background: linear-gradient(135deg, #2EE872 0%, #1EBEA5 100%);
  box-shadow: 0 15px 35px -5px rgba(37, 211, 102, 0.65);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.hero-sub-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-gold);
  border-radius: 50px;
  padding: 5px 16px;
  font-family: var(--font-display);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary-gold-bright);
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  width: fit-content;
}

.gold-sparkle {
  color: var(--primary-gold-bright);
  font-size: 0.85rem;
}

/* ==========================================================================
   HERO / COMING SOON SECTION
   ========================================================================== */
.hero-coming-soon {
  padding: 40px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-content-col {
  display: flex;
  flex-direction: column;
}

/* Status Pill */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.4);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.76rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: #34D399;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  width: fit-content;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 8px #10B981;
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 10px;
  letter-spacing: -0.5px;
}

.gold-gradient-text {
  background: linear-gradient(135deg, #FFF9E0 0%, var(--primary-gold) 50%, #B8860B 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  color: var(--primary-gold-light);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
}

.hero-desc strong {
  color: #FFFFFF;
}

/* ==========================================================================
   AMAZON QUICK BUY CARD
   ========================================================================== */
.amazon-buy-card {
  background: linear-gradient(135deg, rgba(255, 153, 0, 0.08) 0%, rgba(15, 24, 52, 0.9) 100%);
  border: 1px solid rgba(255, 153, 0, 0.35);
  border-radius: 18px;
  padding: 20px 22px;
  margin-bottom: 24px;
  box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
}

.buy-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.amazon-stars {
  display: flex;
  align-items: center;
  gap: 6px;
}

.stars-gold {
  color: #FF9900;
  font-size: 0.95rem;
  letter-spacing: 1px;
}

.bestseller-label {
  font-size: 0.78rem;
  color: #FFFFFF;
  font-weight: 700;
}

.prime-badge {
  display: inline-flex;
  align-items: center;
  background: #00A8E1;
  color: #FFFFFF;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

/* Edition Selector */
.edition-selector-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.edition-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-gold);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--tr-fast);
}

.edition-pill.featured {
  background: rgba(212, 175, 55, 0.12);
  border-color: var(--primary-gold);
  box-shadow: 0 0 15px rgba(212, 175, 55, 0.2);
}

.edition-pill.signed-pill {
  border-color: rgba(37, 211, 102, 0.5);
  background: rgba(37, 211, 102, 0.08);
}

.edition-pill.signed-pill:hover {
  background: rgba(37, 211, 102, 0.16);
  border-color: #25D366;
  transform: translateY(-2px);
}

.edition-pill-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.edition-name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.edition-badge-tag {
  font-size: 0.62rem;
  background: rgba(212, 175, 55, 0.2);
  color: var(--primary-gold-bright);
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 700;
}

.edition-price {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFFFFF;
}

.edition-pill.featured .edition-price {
  color: var(--primary-gold-bright);
}

/* Buy Card Actions */
.buy-card-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.buy-card-actions .btn-amazon {
  flex: 1 1 240px;
}

.buy-card-actions .btn-glass {
  flex: 0 1 auto;
}

.stock-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: #34D399;
  font-weight: 600;
}

.stock-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
}

/* ==========================================================================
   LAUNCH COUNTDOWN BOX
   ========================================================================== */
.countdown-box {
  background: rgba(11, 19, 43, 0.85);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 18px 20px;
}

.countdown-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.countdown-digits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.digit-unit {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 10px;
  padding: 8px 4px;
}

.digit-num {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-gold-bright);
  line-height: 1;
}

.digit-name {
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 4px;
  font-weight: 600;
}

/* Notify Form */
.notify-form {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.notify-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  padding: 10px 18px;
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
}

.notify-input:focus {
  border-color: var(--primary-gold);
  background: rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   INTERACTIVE 3D BOOK STAGE
   ========================================================================== */
.book-interactive-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  position: relative;
}

.book-scene-wrapper {
  position: relative;
  display: inline-block;
  margin: 0 auto;
}

.book-3d-scene {
  width: 280px;
  height: 410px;
  perspective: 1400px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
  touch-action: pan-y;
}

.book-3d-scene:active {
  cursor: grabbing;
}

.book-object {
  width: 260px;
  height: 390px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  transform: rotateY(-22deg) rotateX(6deg);
}

/* Front Cover Face */
.book-face-front {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 4px 14px 14px 4px;
  background: url('../assets/images/book-cover-front.jpg') center/cover no-repeat;
  transform: translateZ(16px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7), inset 2px 0 5px rgba(255, 255, 255, 0.3);
}

/* Spine */
.book-face-spine {
  position: absolute;
  width: 32px;
  height: 100%;
  left: -16px;
  top: 0;
  background: linear-gradient(90deg, #4A2810 0%, #7A421A 50%, #3D200D 100%);
  transform: rotateY(-90deg);
  border-radius: 4px 0 0 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  font-size: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  writing-mode: vertical-rl;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: inset -3px 0 6px rgba(0, 0, 0, 0.5);
}

/* Back Cover Face */
.book-face-back {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 14px 4px 4px 14px;
  background: url('../assets/images/book-cover-back.jpg') center/cover no-repeat;
  transform: rotateY(180deg) translateZ(16px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7);
}

/* Pages Side */
.book-face-pages {
  position: absolute;
  width: 30px;
  height: 96%;
  right: -14px;
  top: 2%;
  background: linear-gradient(90deg, #F9F6EE 0%, #DFD7C4 100%);
  transform: rotateY(90deg);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  border-radius: 2px;
}

/* Book Floor Shadow */
.book-floor-shadow {
  width: 75%;
  height: 20px;
  margin: -10px auto 0;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.8) 0%, transparent 75%);
  filter: blur(6px);
  border-radius: 50%;
}

/* Bestseller Seal Attached to Book Corner */
.bestseller-seal {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 86px;
  height: 86px;
  background: radial-gradient(circle, #FFF2A8 0%, #D4AF37 60%, #94710A 100%);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #050A18;
  font-family: var(--font-serif);
  font-weight: 900;
  text-align: center;
  box-shadow: 0 10px 25px rgba(212, 175, 55, 0.5);
  z-index: 15;
  transform: rotate(12deg);
  animation: floatSeal 4s ease-in-out infinite alternate;
}

.seal-small { font-size: 0.6rem; letter-spacing: 0.5px; }
.seal-big { font-size: 1.25rem; line-height: 1; }

@keyframes floatSeal {
  0% { transform: rotate(12deg) translateY(0); }
  100% { transform: rotate(12deg) translateY(-6px); }
}

/* Controls Toolbar */
.book-controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: rgba(11, 19, 43, 0.95);
  border: 1px solid var(--border-gold);
  border-radius: 50px;
  padding: 5px 10px;
  margin-top: 18px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  max-width: 95%;
  flex-wrap: wrap;
}

.book-control-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--tr-fast);
  white-space: nowrap;
}

.book-control-btn:hover, .book-control-btn.active {
  background: var(--primary-gold);
  color: #050A18;
}

.touch-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  text-align: center;
}

/* ==========================================================================
   MOVEMENT METRIC STRIP
   ========================================================================== */
.movement-strip {
  background: linear-gradient(180deg, #050A18 0%, #0B132B 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 30px 0;
}

.movement-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: center;
}

.movement-card {
  padding: 16px 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
}

.movement-num {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  font-weight: 800;
  color: var(--primary-gold-bright);
  line-height: 1.1;
}

.movement-desc {
  font-size: clamp(0.7rem, 2vw, 0.85rem);
  color: var(--text-secondary);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   AUTHOR HAND-SIGNED COPY (SPECIAL STANDARD GIFT SECTION)
   ========================================================================== */
.signed-copy-section {
  padding: 60px 0;
  position: relative;
}

.signed-copy-card {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12) 0%, rgba(14, 22, 48, 0.95) 45%, rgba(37, 211, 102, 0.08) 100%);
  border: 2px solid var(--primary-gold);
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.7), 0 0 35px rgba(212, 175, 55, 0.2);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 36px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.signed-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #FFDF00 0%, #D4AF37 100%);
  color: #050A18;
  padding: 5px 14px;
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.signed-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
  line-height: 1.2;
}

.signed-subtitle {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--primary-gold-light);
  font-weight: 600;
  margin-bottom: 16px;
}

.signed-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.signed-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

.signed-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: #FFFFFF;
  font-weight: 600;
}

.signed-feature-item span {
  color: var(--primary-gold-bright);
}

.signed-action-box {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-gold);
  border-radius: 18px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  width: 100%;
}

.signed-price-display {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.signed-price-val {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--primary-gold-bright);
  line-height: 1;
}

.signed-price-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.signed-tagline-quote {
  font-size: 0.86rem;
  font-style: italic;
  color: var(--primary-gold-light);
}

/* Quick Order Form for Author Hand-Signed Edition */
.signed-order-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.signed-form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  width: 100%;
}

.signed-form-label {
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--primary-gold-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.signed-input {
  width: 100%;
  background: rgba(5, 10, 24, 0.75);
  border: 1px solid var(--border-gold);
  border-radius: 10px;
  padding: 10px 14px;
  color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  transition: all var(--tr-fast);
}

.signed-input:focus {
  border-color: #25D366;
  box-shadow: 0 0 14px rgba(37, 211, 102, 0.35);
  background: rgba(5, 10, 24, 0.95);
}

.signed-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.82rem;
}

.signed-textarea {
  min-height: 56px;
  resize: vertical;
}

.whatsapp-direct-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  line-height: 1.4;
  margin-top: 4px;
}

.author-actions-wrap {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-brand-logo-wrap {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
}

.footer-logo-img {
  height: 48px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  display: block;
}

/* ==========================================================================
   AUTHOR FEATURE SECTION
   ========================================================================== */
.author-highlight-section {
  padding: 70px 0;
  position: relative;
}

.author-card-flex {
  background: linear-gradient(135deg, rgba(11, 19, 43, 0.85) 0%, rgba(15, 24, 52, 0.95) 100%);
  border: 1px solid var(--border-gold);
  border-radius: 24px;
  padding: 36px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: center;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
}

.author-photo-wrapper {
  position: relative;
  text-align: center;
}

.author-photo-img {
  width: 100%;
  max-width: 240px;
  border-radius: 18px;
  border: 2px solid var(--primary-gold);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 25px rgba(212, 175, 55, 0.25);
  background: #FFFFFF;
}

.author-info-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  color: #FFFFFF;
  margin-bottom: 6px;
}

.author-title-tag {
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--primary-gold);
  font-weight: 600;
  margin-bottom: 16px;
}

.author-bio {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 20px;
}

.author-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.author-badge-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-gold-light);
}

/* ==========================================================================
   VIP ENDORSEMENTS SECTION
   ========================================================================== */
.endorsements-section {
  padding: 70px 0;
  background: #040814;
}

.section-head-center {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 36px;
}

.section-eyebrow {
  display: block;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-gold);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  color: #FFFFFF;
}

.endorsements-swipe-hint {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--primary-gold);
  margin-bottom: 14px;
  font-weight: 700;
  text-transform: uppercase;
}

.endorsements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.endorsement-bubble {
  background: var(--bg-dark-card);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 18px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--tr-normal);
}

.endorsement-bubble:hover {
  transform: translateY(-4px);
  border-color: var(--primary-gold);
}

.bubble-quote {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
}

.bubble-author {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 14px;
}

.bubble-initials {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-gold) 0%, #684E0B 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #FFFFFF;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.bubble-author-info h4 {
  font-size: 0.9rem;
  color: var(--primary-gold-light);
  font-weight: 700;
}

.bubble-author-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   LOOK INSIDE EXCERPT MODAL
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(3, 7, 18, 0.9);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-content-card {
  background: var(--bg-dark-surface);
  border: 1px solid var(--border-gold);
  border-radius: 20px;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 30px;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: #FFF;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   MOBILE STICKY BOTTOM ACTION BAR
   ========================================================================== */
.mobile-sticky-buy-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(5, 10, 24, 0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-gold);
  padding: 10px 16px;
  z-index: 999;
  box-shadow: 0 -8px 25px rgba(0, 0, 0, 0.6);
}

.mobile-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.mobile-price-tag {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.mobile-price-title {
  font-size: 0.7rem;
  color: var(--primary-gold-light);
  font-weight: 700;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-price-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.mobile-price-badge {
  font-size: 0.78rem;
  color: #FFFFFF;
  font-weight: 800;
}

.mobile-price-badge.alt {
  color: var(--primary-gold);
}

.mobile-bar-btn {
  flex-shrink: 0;
  padding: 8px 16px;
  font-size: 0.82rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: #02050D;
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 80px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

.footer-inner {
  max-width: 750px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 6px;
}

.footer-sub {
  color: var(--primary-gold);
  font-size: 0.82rem;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  list-style: none;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--tr-fast);
}

.footer-links a:hover {
  color: var(--primary-gold);
}

/* ==========================================================================
   MOBILE & RESPONSIVE LAYOUT (FLAWLESS CENTERING, PADDING & ALIGNMENT)
   ========================================================================== */
@media (max-width: 992px) {
  /* Dynamic mobile layout flow: Header -> 3D Book -> Buy Box -> Pitch -> Countdown */
  .hero-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
  }

  .hero-content-col {
    display: contents; /* Allows children to be re-ordered cleanly on mobile */
  }

  .hero-header-box {
    order: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    text-align: center;
  }

  .book-interactive-stage {
    order: 2;
    padding: 10px 0 20px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .amazon-buy-card {
    order: 3;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    text-align: left;
  }

  .hero-desc {
    order: 4;
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
  }

  .countdown-box {
    order: 5;
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
    text-align: center;
  }

  .author-card-flex {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 30px 20px;
    gap: 24px;
  }

  .author-photo-img {
    margin: 0 auto;
    max-width: 200px;
  }

  .author-badges {
    justify-content: center;
  }

  .author-actions-wrap {
    justify-content: center;
  }

  .endorsements-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile & Tablet Screens (<= 768px) */
@media (max-width: 768px) {
  body {
    padding-bottom: 74px; /* Safe padding for bottom sticky bar */
  }

  .btn {
    white-space: normal;
    text-align: center;
    line-height: 1.3;
  }

  /* Header Mobile */
  .header-inner {
    padding: 8px 12px;
    gap: 8px;
  }

  .header-status-pill {
    display: none; /* Hide in mobile header to prevent crowding */
  }

  .brand-logo-img {
    height: 36px;
    max-width: 140px;
  }

  .header-amazon-btn {
    padding: 6px 10px;
    font-size: 0.72rem;
    white-space: nowrap;
    border-radius: 20px;
  }

  /* Hero Section Mobile */
  .hero-coming-soon {
    padding: 16px 0 32px;
  }

  .status-pill {
    max-width: 100%;
    font-size: 0.68rem;
    padding: 4px 10px;
    text-align: center;
    justify-content: center;
    line-height: 1.35;
    margin-bottom: 12px;
  }

  .hero-title {
    font-size: clamp(1.9rem, 7vw, 2.5rem);
    text-align: center;
    line-height: 1.15;
    margin-bottom: 6px;
  }

  .hero-tagline {
    font-size: clamp(0.95rem, 3.8vw, 1.2rem);
    text-align: center;
    margin: 4px 0 10px;
  }

  .hero-sub-tagline {
    font-size: 0.76rem;
    padding: 4px 12px;
    margin: 0 auto 14px;
    text-align: center;
    display: inline-flex;
    justify-content: center;
    width: auto;
    max-width: 100%;
  }

  .hero-desc {
    font-size: 0.88rem;
    line-height: 1.6;
    padding: 0 4px;
    text-align: center;
  }

  /* 3D Book Scene Mobile */
  .book-interactive-stage {
    padding: 8px 0 16px;
  }

  .book-scene-wrapper {
    margin: 0 auto;
  }

  .book-3d-scene {
    width: 220px;
    height: 330px;
    margin: 0 auto;
  }

  .book-object {
    width: 200px;
    height: 310px;
  }

  .book-face-spine {
    width: 24px;
    left: -12px;
    font-size: 0.58rem;
  }

  .book-face-pages {
    width: 22px;
    right: -11px;
  }

  .bestseller-seal {
    width: 70px;
    height: 70px;
    top: -8px;
    right: -8px;
  }

  .seal-small { font-size: 0.52rem; }
  .seal-big { font-size: 1.05rem; }

  .book-controls-bar {
    margin-top: 10px;
    padding: 4px 8px;
    justify-content: center;
    gap: 4px;
  }

  .book-control-btn {
    padding: 5px 9px;
    font-size: 0.72rem;
  }

  .touch-hint {
    justify-content: center;
    font-size: 0.72rem;
  }

  /* Amazon Buy Card Mobile */
  .amazon-buy-card {
    padding: 18px 14px;
    max-width: 500px;
    width: 100%;
  }

  .edition-selector-pills {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
  }

  .edition-selector-pills .signed-pill {
    grid-column: span 2;
  }

  .edition-pill {
    padding: 8px 10px;
  }

  .edition-name {
    font-size: 0.68rem;
  }

  .edition-price {
    font-size: 1.15rem;
  }

  .buy-card-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }

  .buy-card-actions .btn {
    width: 100%;
    padding: 13px 16px;
    font-size: 0.88rem;
    justify-content: center;
  }

  .stock-indicator {
    justify-content: center;
    text-align: center;
    font-size: 0.75rem;
  }

  /* Countdown Box Mobile */
  .countdown-box {
    padding: 18px 14px;
    max-width: 500px;
    width: 100%;
    text-align: center;
  }

  .countdown-label {
    justify-content: center;
    text-align: center;
    font-size: 0.72rem;
  }

  .countdown-digits {
    justify-content: center;
    gap: 8px;
  }

  .digit-unit {
    min-width: 60px;
    padding: 8px 4px;
  }

  .digit-num {
    font-size: 1.45rem;
  }

  .digit-name {
    font-size: 0.62rem;
  }

  .notify-form {
    flex-direction: column;
    gap: 8px;
    width: 100%;
  }

  .notify-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.85rem;
  }

  .notify-form .btn {
    width: 100%;
    padding: 12px;
  }

  /* Author Hand-Signed Copy Section Mobile */
  .signed-copy-section {
    padding: 40px 0;
  }

  .signed-copy-card {
    grid-template-columns: 1fr;
    padding: 24px 14px;
    gap: 20px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
  }

  .signed-badge-pill {
    margin: 0 auto 10px;
    font-size: 0.72rem;
  }

  .signed-title {
    font-size: clamp(1.6rem, 5.5vw, 2rem);
    text-align: center;
    line-height: 1.2;
  }

  .signed-subtitle {
    font-size: 0.88rem;
    text-align: center;
    margin-bottom: 12px;
  }

  .signed-desc {
    font-size: 0.88rem;
    text-align: center;
    line-height: 1.6;
    margin-bottom: 16px;
  }

  .signed-features-grid {
    grid-template-columns: 1fr;
    max-width: 320px;
    margin: 0 auto 16px;
    text-align: left;
    gap: 8px;
  }

  .signed-feature-item {
    font-size: 0.84rem;
  }

  .signed-action-box {
    padding: 20px 14px;
    width: 100%;
    text-align: center;
  }

  .signed-price-val {
    font-size: 2.2rem;
  }

  .signed-action-box .btn {
    width: 100%;
    padding: 14px 16px;
    font-size: 0.9rem;
    justify-content: center;
  }

  /* Author Section Mobile */
  .author-highlight-section {
    padding: 40px 0;
  }

  .author-card-flex {
    grid-template-columns: 1fr;
    padding: 24px 14px;
    gap: 20px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
  }

  .author-photo-img {
    max-width: 175px;
    margin: 0 auto;
  }

  .author-info-content {
    text-align: center;
  }

  .author-info-content h2 {
    font-size: 1.8rem;
    text-align: center;
  }

  .author-title-tag {
    font-size: 0.88rem;
    text-align: center;
  }

  .author-bio {
    font-size: 0.88rem;
    line-height: 1.6;
    text-align: center;
  }

  .author-badges {
    justify-content: center;
  }

  .author-actions-wrap {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 320px;
    margin: 18px auto 0;
  }

  .author-actions-wrap .btn {
    width: 100%;
    justify-content: center;
  }

  /* Swipeable Endorsements */
  .endorsements-swipe-hint {
    display: flex;
    justify-content: center;
    font-size: 0.74rem;
    margin-bottom: 12px;
  }

  .endorsements-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 14px;
    padding: 6px 4px 16px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .endorsements-grid::-webkit-scrollbar {
    display: none;
  }

  .endorsement-bubble {
    flex: 0 0 86%;
    scroll-snap-align: center;
    padding: 20px 16px;
  }

  /* Mobile Sticky Bottom Bar */
  .mobile-sticky-buy-bar {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background: rgba(5, 10, 24, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-gold);
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
  }

  .mobile-bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    max-width: 500px;
    margin: 0 auto;
  }

  .mobile-price-title {
    font-family: var(--font-serif);
    font-size: 0.76rem;
    font-weight: 700;
    color: #FFFFFF;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .mobile-price-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
  }

  .mobile-bar-btn {
    padding: 8px 12px;
    font-size: 0.72rem;
    white-space: nowrap;
    border-radius: 20px;
  }

  .modal-content-card {
    padding: 22px 14px;
    max-width: 94vw;
  }
}

/* Movement Strip Mobile (< 640px) */
@media (max-width: 640px) {
  .movement-strip {
    padding: 24px 0;
  }

  .movement-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    max-width: 360px;
    margin: 0 auto;
  }

  .movement-card {
    padding: 14px 10px;
  }

  .movement-num {
    font-size: 1.65rem;
  }

  .movement-desc {
    font-size: 0.8rem;
  }
}

/* Small Mobile Screens (<= 480px) */
@media (max-width: 480px) {
  .container {
    padding: 0 14px;
  }

  .brand-logo-img {
    height: 32px;
    max-width: 125px;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .signed-price-val {
    font-size: 2.1rem;
  }

  .book-3d-scene {
    width: 205px;
    height: 310px;
  }

  .book-object {
    width: 190px;
    height: 295px;
  }
}

/* Extra Small Phones (<= 360px) */
@media (max-width: 360px) {
  .container {
    padding: 0 10px;
  }

  .brand-logo-img {
    height: 28px;
    max-width: 110px;
  }

  .header-amazon-btn {
    padding: 5px 8px;
    font-size: 0.65rem;
  }

  .hero-title {
    font-size: 1.65rem;
  }

  .book-3d-scene {
    width: 180px;
    height: 280px;
  }

  .book-object {
    width: 165px;
    height: 260px;
  }

  .bestseller-seal {
    width: 60px;
    height: 60px;
    top: -6px;
    right: -6px;
  }
}