/* =====================================================================
   SALE PAGE STYLES - HIỂU MÌNH ĐỂ HIỂU CON
   Tối ưu chuyển đổi (CRO), hiện đại, thanh thoát, 100% mobile responsive
   ===================================================================== */

:root {
  --primary: #0e5a5e;
  --primary-dark: #0b3f44;
  --primary-light: #e4efef;
  --accent: #e8a93a;
  --accent-dark: #c28318;
  --accent-light: #fef8ec;
  --bg-page: #faf8f5;
  --bg-white: #ffffff;
  --bg-card: #f8fafc;
  --ink: #1a2628;
  --ink-light: #475569;
  --ink-muted: #64748b;
  --rule: #e2e8f0;
  --rule-teal: #cfe0e0;
  --success: #16a34a;
  --danger: #dc2626;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(14,90,94,0.12);
  --shadow-xl: 0 20px 48px rgba(14,90,94,0.18);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --font-serif: "Playfair Display", Georgia, serif;
  --font-sans: "Be Vietnam Pro", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--bg-page);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 72px; /* space for mobile sticky bar */
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* =====================================================================
   TYPOGRAPHY & UTILS
   ===================================================================== */
h1, h2, h3, h4 {
  color: var(--primary-dark);
  font-family: var(--font-serif);
  line-height: 1.25;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--primary);
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.container.narrow {
  max-width: 840px;
}

.text-center {
  text-align: center;
}

.highlight {
  font-style: italic;
  color: var(--accent-dark);
}

.section {
  padding: 72px 0;
}

.section-header {
  margin-bottom: 44px;
}

.sub-head {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 10px;
}

.section-lead {
  font-size: 17px;
  color: var(--ink-light);
  max-width: 680px;
  margin: 0 auto;
}

/* =====================================================================
   BUTTONS
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--primary-dark);
  border: 1.5px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary-light);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

.btn-nav {
  padding: 8px 18px;
  font-size: 13px;
  background: var(--primary);
  color: #fff;
}

.btn-block {
  width: 100%;
}

.ico, .ico-sm, .ico-btn {
  width: 18px;
  height: 18px;
  display: inline-block;
  flex: none;
}

.ico-sm {
  width: 14px;
  height: 14px;
}

/* =====================================================================
   TOP PROMO BAR & NAVIGATION
   ===================================================================== */
.top-bar {
  background: var(--primary-dark);
  color: #fff;
  font-size: 13px;
  padding: 8px 16px;
  position: relative;
  z-index: 40;
}

.top-bar-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.badge-promo {
  background: var(--accent);
  color: #111;
  font-weight: 700;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.countdown-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.12);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.countdown-wrap strong {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.05em;
}

.top-zalo {
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.top-zalo:hover {
  color: var(--accent);
}

.nav {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 12px 0;
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.nav-links a.nav-link.active {
  color: var(--primary);
  font-weight: 700;
  position: relative;
}

.nav-links a.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 35;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 2.5px;
  background: var(--primary-dark);
  border-radius: 2px;
  transition: all 0.25s ease;
}

@media (min-width: 900px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-nav {
  display: none;
  flex-direction: column;
  background: #fff;
  border-bottom: 2px solid var(--rule);
  padding: 16px 20px;
  gap: 12px;
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav a {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
}

.mobile-nav a:hover, .mobile-nav a.active {
  color: var(--primary);
}

.mobile-nav .btn {
  margin-top: 8px;
  text-align: center;
}

.brand-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: -0.01em;
  margin-bottom: 2px;
}

.brand-sub {
  font-size: 10.5px;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--accent-dark);
  text-transform: uppercase;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 20px;
}

.nav-links a:not(.btn) {
  font-size: 14px;
  color: var(--ink-light);
  font-weight: 500;
}

.nav-links a:not(.btn):hover {
  color: var(--primary);
}

@media (min-width: 900px) {
  .nav-links {
    display: flex;
  }
}

/* =====================================================================
   HERO SECTION & 3D BOOK MOCKUP
   ===================================================================== */
.hero {
  background: linear-gradient(180deg, #f2f7f7 0%, var(--bg-page) 100%);
  padding: 48px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 860px) {
  .hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

.pill-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 18px;
}

.dot-live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 169, 58, 0.35);
}

.hero-title {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  color: var(--primary-dark);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 17px;
  color: var(--ink-light);
  line-height: 1.6;
  margin-bottom: 24px;
  max-width: 580px;
}

/* Fast price cards inside Hero */
.hero-price-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

@media (min-width: 540px) {
  .hero-price-cards {
    grid-template-columns: 1fr 1fr;
  }
}

.price-chip {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.2s;
}

.chip-ebook {
  border-left: 4px solid var(--primary);
}

.chip-print {
  border-left: 4px solid var(--accent);
}

.chip-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

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

.chip-price b {
  font-size: 22px;
  color: var(--primary-dark);
  font-family: var(--font-sans);
}

.chip-price del {
  color: var(--ink-muted);
  font-size: 14px;
}

.badge-discount {
  background: #fee2e2;
  color: var(--danger);
  font-size: 11px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
}

.chip-sub {
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.35;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

@media (min-width: 480px) {
  .hero-cta-group {
    flex-direction: row;
  }
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.trust-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-light);
}

.trust-item strong {
  font-size: 17px;
  color: var(--primary);
  font-weight: 700;
}

.trust-divider {
  width: 1px;
  height: 18px;
  background: var(--rule);
}

/* 3D BOOK MOCKUP VISUAL */
.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.book-3d-scene {
  perspective: 1400px;
  position: relative;
  display: inline-block;
  padding: 20px 20px 40px;
}

.book-3d {
  position: relative;
  width: 250px;
  height: 355px;
  transform: rotateY(-18deg) rotateX(8deg);
  transform-style: preserve-3d;
  transition: transform 0.4s ease;
  filter: drop-shadow(18px 24px 30px rgba(11, 63, 68, 0.28));
}

@media (min-width: 480px) {
  .book-3d {
    width: 290px;
    height: 410px;
  }
}

.book-3d:hover {
  transform: rotateY(-10deg) rotateX(4deg) translateY(-8px);
}

.book-cover {
  position: absolute;
  inset: 0;
  border-radius: 4px 10px 10px 4px;
  overflow: hidden;
  background: #0e5a5e;
  z-index: 2;
}

.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Realistic spine highlight & page edges */
.book-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.25) 0%, rgba(255,255,255,0) 4%, rgba(0,0,0,0.1) 8%, rgba(255,255,255,0.08) 12%, transparent 20%);
  pointer-events: none;
}

.book-pages {
  position: absolute;
  top: 6px;
  right: -16px;
  bottom: 6px;
  width: 18px;
  background: linear-gradient(90deg, #fdfbf7, #e6ded4);
  transform: rotateY(90deg);
  transform-origin: right;
  border-radius: 0 2px 2px 0;
  box-shadow: inset 0 0 4px rgba(0,0,0,0.15);
}

.floating-badge {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--rule);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  z-index: 5;
  animation: float 4s ease-in-out infinite alternate;
  will-change: transform;
}

.floating-badge b {
  display: block;
  color: var(--primary-dark);
  font-size: 13px;
}

.floating-badge span {
  color: var(--ink-muted);
}

.badge-phone {
  bottom: 15px;
  left: -10px;
}

.badge-author {
  top: 10px;
  right: -15px;
}

.badge-icon {
  width: 26px;
  height: 26px;
  color: var(--primary);
  flex: none;
}

.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex: none;
}

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

/* =====================================================================
   PAIN POINTS SECTION
   ===================================================================== */
.section-pain {
  background: #fff;
}

.pain-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 36px;
}

@media (min-width: 700px) {
  .pain-cards {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  transition: transform 0.2s;
}

.pain-card:hover {
  transform: translateY(-4px);
  border-color: var(--rule-teal);
}

.pain-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.pain-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.pain-card p {
  font-size: 14px;
  color: var(--ink-light);
  line-height: 1.55;
  margin: 0;
}

.quote-callout {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 24px 28px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: 20px;
}

.quote-callout blockquote {
  font-family: var(--font-serif);
  font-size: 18px;
  font-style: italic;
  color: var(--primary-dark);
  margin: 0 0 10px;
  line-height: 1.5;
}

.quote-callout cite {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: block;
}

/* =====================================================================
   FEATURES / VALUE SECTION
   ===================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.feature-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all 0.25s;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.feature-num {
  font-family: var(--font-sans);
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 19px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--ink-light);
  font-size: 15px;
  margin: 0;
}

/* =====================================================================
   "THAY VÌ ➔ HÃY THỬ" COMPARISON SECTION
   ===================================================================== */
.section-compare {
  background: #fff;
}

.comparison-cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.pair-card {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.pair-situation {
  background: var(--primary-dark);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  letter-spacing: 0.03em;
}

.pair-body {
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: center;
}

@media (min-width: 720px) {
  .pair-body {
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
  }
}

.pair-col {
  padding: 16px;
  border-radius: var(--radius-md);
}

.col-instead {
  background: #fff5f5;
  border-left: 3px solid var(--danger);
}

.col-try {
  background: #f0fdf4;
  border-left: 3px solid var(--success);
}

.tag-instead {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--danger);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.tag-try {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--success);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.pair-col p {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 6px;
  line-height: 1.4;
}

.pair-col small {
  display: block;
  font-size: 12px;
  color: var(--ink-muted);
  line-height: 1.35;
}

.pair-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  font-weight: bold;
}

/* =====================================================================
   HƯỚNG DẪN TẢI & ĐỌC SÁCH TRÊN ĐIỆN THOẠI
   ===================================================================== */
.section-guide {
  background: linear-gradient(180deg, var(--bg-page) 0%, #edf4f4 100%);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 768px) {
  .guide-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.guide-box {
  background: #fff;
  border: 1px solid var(--rule-teal);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.guide-badge {
  position: absolute;
  top: -12px;
  left: 28px;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
}

.badge-rec {
  background: var(--primary);
  color: #fff;
}

.badge-epub {
  background: var(--accent);
  color: #111;
}

.guide-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

.guide-icon {
  font-size: 36px;
  line-height: 1;
}

.guide-header h3 {
  font-size: 19px;
  margin: 0 0 4px;
}

.guide-header p {
  font-size: 13px;
  color: var(--ink-muted);
  margin: 0;
}

.guide-steps {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.guide-steps li {
  font-size: 14px;
  color: var(--ink-light);
  line-height: 1.5;
}

.guide-steps strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 2px;
}

/* =====================================================================
   AUTHOR SECTION
   ===================================================================== */
.section-author {
  background: #fff;
}

.author-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--rule-teal);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  align-items: center;
}

@media (min-width: 680px) {
  .author-card {
    grid-template-columns: 180px 1fr;
    gap: 36px;
  }
}

.author-avatar-wrap {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.author-initials {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-family: var(--font-serif);
  font-size: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  margin-bottom: 10px;
}

.author-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-dark);
}

.author-info h2 {
  font-size: 26px;
  margin-bottom: 6px;
}

.author-titles {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 14px;
}

.author-info p {
  font-size: 15px;
  color: var(--ink-light);
}

.author-letter {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  color: var(--primary-dark);
}

/* =====================================================================
   TEASER CUỐN 2: SẮP RA MẮT
   ===================================================================== */
.section-teaser {
  background: var(--bg-page);
}

.teaser-box {
  background: #fff;
  border: 2px dashed var(--rule-teal);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
}

.teaser-badge {
  position: absolute;
  top: -12px;
  right: 28px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.08em;
}

.teaser-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

@media (min-width: 680px) {
  .teaser-content {
    grid-template-columns: 200px 1fr;
    gap: 32px;
  }
}

.teaser-img img {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 220px;
  margin: 0 auto;
}

.eyebrow-teal {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
  display: block;
  margin-bottom: 4px;
}

.teaser-text h3 {
  font-size: 22px;
  margin-bottom: 6px;
}

.teaser-sub {
  font-size: 14px;
  color: var(--ink-muted);
  font-style: italic;
  margin-bottom: 14px;
}

.ticks-teal {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.ticks-teal li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--ink-light);
  margin-bottom: 6px;
}

.ticks-teal li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 800;
}

/* =====================================================================
   ORDER SECTION & FORMS
   ===================================================================== */
.section-order {
  background: #fff;
}

.order-tabs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 28px;
}

@media (min-width: 580px) {
  .order-tabs {
    grid-template-columns: 1fr 1fr;
  }
}

.tab-btn {
  all: unset;
  box-sizing: border-box;
  background: var(--bg-card);
  border: 2px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.2s;
}

.tab-btn.active {
  background: #fff;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.tab-icon {
  font-size: 28px;
  line-height: 1;
}

.tab-btn strong {
  display: block;
  font-size: 14px;
  color: var(--primary-dark);
}

.tab-btn span {
  font-size: 12px;
  color: var(--ink-muted);
}

/* =====================================================================
   PRODUCT PICKER CARDS INSIDE TABS
   ===================================================================== */
.product-picker-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

@media (min-width: 640px) {
  .product-picker-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card-option {
  position: relative;
  background: #fff;
  border: 2px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
}

.product-card-option:hover {
  border-color: var(--primary-muted);
  box-shadow: var(--shadow-sm);
}

.product-card-option.active {
  border-color: var(--primary);
  background: #fdfefe;
  box-shadow: 0 0 0 3px rgba(14, 90, 94, 0.15), var(--shadow-sm);
}

.product-card-option.featured {
  border-color: var(--accent);
}

.product-card-option.featured.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 169, 58, 0.25), var(--shadow-md);
}

.prod-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 8px;
  align-self: flex-start;
}

.product-card-option.featured .prod-badge {
  color: #8c5600;
  background: #fef3d6;
}

.prod-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 4px;
  line-height: 1.35;
}

.prod-desc {
  font-size: 11px;
  color: var(--ink-muted);
  margin: 0 0 12px;
  line-height: 1.4;
  flex-grow: 1;
}

.prod-pricing {
  display: flex;
  align-items: baseline;
  gap: 8px;
  border-top: 1px dashed var(--rule);
  padding-top: 10px;
}

.prod-price {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary-dark);
}

.product-card-option.featured .prod-price {
  color: #b36b00;
}

.prod-old-price {
  font-size: 12px;
  color: var(--ink-faint);
  text-decoration: line-through;
}

.order-container {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
}

@media (min-width: 600px) {
  .order-container {
    padding: 36px 36px;
  }
}

.selected-plan-summary {
  background: #fff;
  border: 1.5px solid var(--rule-teal);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
}

@media (min-width: 540px) {
  .selected-plan-summary {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.plan-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
}

.plan-info h3 {
  font-size: 18px;
  margin: 0 0 4px;
}

.plan-info p {
  font-size: 13px;
  color: var(--ink-muted);
  margin: 0;
}

.plan-price-box {
  text-align: left;
}

@media (min-width: 540px) {
  .plan-price-box {
    text-align: right;
  }
}

.plan-price {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-dark);
  font-family: var(--font-sans);
  line-height: 1;
}

.plan-price-box del {
  color: var(--ink-muted);
  font-size: 14px;
  display: block;
  margin-top: 3px;
}

.badge-saving {
  display: inline-block;
  background: #fee2e2;
  color: var(--danger);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 4px;
}

/* FORM FIELDS */
.form-fields {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.req {
  color: var(--danger);
}

.form-group input {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--rule);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14, 90, 94, 0.15);
}

.field-hint {
  display: block;
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 5px;
}

.field-error {
  display: block;
  font-size: 12px;
  color: var(--danger);
  margin-top: 4px;
  font-weight: 500;
}

.btn-submit {
  width: 100%;
  padding: 16px 24px;
  font-size: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #111;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 0;
}

.btn-submit:hover {
  background: var(--accent-dark);
  color: #fff;
}

.form-secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-muted);
  margin: 12px 0 0;
}

.ico-lock {
  width: 14px;
  height: 14px;
  color: var(--success);
}

.form-error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-top: 16px;
}

/* =====================================================================
   QR PAYMENT PANEL
   ===================================================================== */
.pay-panel {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px 20px;
}

.pay-header {
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}

.pay-badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.pay-header h3 {
  font-size: 20px;
  margin: 8px 0 6px;
}

.pay-header p {
  font-size: 14px;
  color: var(--ink-muted);
  margin: 0;
}

.pay-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

@media (min-width: 640px) {
  .pay-body {
    grid-template-columns: 260px 1fr;
    gap: 32px;
  }
}

.qr-col {
  text-align: center;
}

.qr-frame {
  background: #fff;
  border: 2px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 10px;
  display: inline-block;
  box-shadow: var(--shadow-md);
  position: relative;
}

.qr-frame img {
  display: block;
}

.qr-note {
  display: block;
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 8px;
}

.transfer-info {
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--rule);
  font-size: 14px;
}

.info-row dt {
  color: var(--ink-muted);
}

.info-row dd {
  margin: 0;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlight-price {
  font-size: 20px;
  color: var(--danger) !important;
  font-weight: 800;
}

.btn-copy {
  all: unset;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--primary);
}

.btn-copy:hover {
  background: var(--primary-light);
}

.transfer-alert {
  background: #fffbeb;
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  font-size: 13px;
  border-radius: 4px;
  margin-bottom: 16px;
  line-height: 1.45;
}

.pay-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.status-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(14,90,94,0.25);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-cancel {
  all: unset;
  font-size: 13px;
  color: var(--ink-muted);
  cursor: pointer;
  text-decoration: underline;
}

.btn-cancel:hover {
  color: var(--danger);
}

/* SUCCESS PANELS */
.success-panel {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
}

.success-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.success-panel h3 {
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 8px;
}

.success-sub {
  font-size: 16px;
  color: var(--ink-light);
  margin-bottom: 24px;
}

.success-instructions {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
  margin-bottom: 24px;
}

.success-instructions h4 {
  font-size: 15px;
  margin-bottom: 10px;
}

.success-instructions ol {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.6;
}

.success-support {
  margin-top: 20px;
}

.btn-zalo-big {
  background: #0068ff;
  color: #fff;
  font-weight: 700;
  padding: 12px 28px;
}

.btn-zalo-big:hover {
  background: #0056d6;
  color: #fff;
}

/* =====================================================================
   FAQ SECTION
   ===================================================================== */
.section-faq {
  background: var(--bg-page);
}

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

.faq-item {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item[open] {
  border-color: var(--primary);
}

.faq-item summary {
  padding: 18px 20px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  position: relative;
  padding-right: 40px;
  color: var(--primary-dark);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--primary);
  font-weight: 300;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 20px 20px;
  font-size: 15px;
  color: var(--ink-light);
  line-height: 1.6;
}

.faq-answer ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.faq-answer li {
  margin-bottom: 6px;
}

/* =====================================================================
   FOOTER
   ===================================================================== */
.footer {
  background: var(--primary-dark);
  color: #fff;
  padding: 36px 0;
  font-size: 14px;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 18px;
  margin-bottom: 6px;
}

.footer-copy {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  margin-bottom: 12px;
}

.footer-contact a {
  color: var(--accent);
}

/* =====================================================================
   FLOATING ZALO BUTTON & MOBILE STICKY BAR
   ===================================================================== */
.float-zalo {
  position: fixed;
  bottom: 84px;
  right: 20px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #0068ff;
  box-shadow: 0 4px 16px rgba(0, 104, 255, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: transform 0.2s;
}
/* Vòng sóng lan ra bằng transform/opacity (GPU), không vẽ lại box-shadow mỗi khung hình */
.float-zalo::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(0, 104, 255, 0.45);
  z-index: -1;
  animation: zalo-ripple 2.5s ease-out infinite;
  will-change: transform, opacity;
  pointer-events: none;
}
@keyframes zalo-ripple {
  0% { transform: scale(1); opacity: 0.8; }
  70%, 100% { transform: scale(1.5); opacity: 0; }
}

@media (min-width: 768px) {
  .float-zalo {
    bottom: 30px;
    right: 30px;
  }
}

.float-zalo:hover {
  transform: scale(1.08);
}

.zalo-svg {
  width: 30px;
  height: 30px;
}

.float-zalo-tooltip {
  position: absolute;
  right: 64px;
  background: #111;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.float-zalo:hover .float-zalo-tooltip {
  opacity: 1;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 104, 255, 0.6); }
  70% { box-shadow: 0 0 0 14px rgba(0, 104, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 104, 255, 0); }
}

.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fff;
  border-top: 1px solid var(--rule);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.08);
  z-index: 45;
}

@media (min-width: 768px) {
  .sticky-bar {
    display: none;
  }
}

.sticky-text {
  display: flex;
  flex-direction: column;
}

.sticky-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-dark);
}

.sticky-price {
  font-size: 12px;
  color: var(--accent-dark);
  font-weight: 600;
}

.btn-sticky {
  padding: 8px 18px;
  font-size: 13px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-full);
}

/* =====================================================================
   MODAL DIALOG (CUỐN 2 PRE-ORDER)
   ===================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal[hidden] {
  display: none !important;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 63, 68, 0.6);
  backdrop-filter: blur(4px);
}

.modal-dialog {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  width: 100%;
  max-width: 480px;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-xl);
}

.modal-close {
  all: unset;
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 26px;
  cursor: pointer;
  color: var(--ink-muted);
}

.modal-close:hover {
  color: var(--danger);
}

.modal-head {
  text-align: center;
  margin-bottom: 20px;
}

.modal-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.modal-head h3 {
  font-size: 20px;
  margin: 8px 0 4px;
}

.modal-head p {
  font-size: 13px;
  color: var(--ink-muted);
  margin: 0;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pre-result {
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  text-align: center;
}

.pre-result.success {
  background: #f0fdf4;
  color: var(--success);
  border: 1px solid #bbf7d0;
}

.pre-result.error {
  background: #fef2f2;
  color: var(--danger);
  border: 1px solid #fecaca;
}

/* =====================================================================
   MULTI-PAGE LAYOUTS: SUBPAGES STYLES
   ===================================================================== */
.page-banner {
  background: linear-gradient(180deg, #f0f7f7 0%, var(--bg-page) 100%);
  padding: 36px 0 28px;
  border-bottom: 1px solid var(--rule);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

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

.page-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 8px;
  line-height: 1.25;
}

@media (min-width: 768px) {
  .page-title {
    font-size: 38px;
  }
}

.page-subtitle {
  font-size: 16px;
  color: var(--ink-light);
  margin: 0;
  max-width: 720px;
  line-height: 1.5;
}

/* AUTHOR PAGE */
.author-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
  margin-bottom: 48px;
}

@media (min-width: 800px) {
  .author-hero-grid {
    grid-template-columns: 340px 1fr;
    gap: 48px;
  }
}

.author-portrait-wrap {
  text-align: center;
}

.author-portrait-frame {
  position: relative;
  display: inline-block;
  border-radius: 20px;
  padding: 8px;
  background: linear-gradient(135deg, #e8a93a 0%, #0e5a5e 100%);
  box-shadow: var(--shadow-lg);
}

.author-portrait-frame img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 14px;
  background: #fff;
}

.author-badge-card {
  margin-top: 16px;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-dark);
}

.credentials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 24px 0;
}

@media (min-width: 600px) {
  .credentials-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.cred-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.cred-card.accent {
  border-left-color: var(--accent);
}

.cred-card strong {
  display: block;
  font-size: 15px;
  color: var(--primary-dark);
  margin-bottom: 4px;
}

.cred-card p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-muted);
}

.letter-sheet {
  background: #fffefb;
  border: 1.5px solid #ebd9b5;
  border-radius: 16px;
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  margin: 32px 0;
}

@media (min-width: 640px) {
  .letter-sheet {
    padding: 44px 40px;
  }
}

.letter-sheet h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  color: #7a4d00;
  margin: 0 0 16px;
}

.letter-sheet p {
  font-size: 15px;
  line-height: 1.7;
  color: #3b2c17;
  margin-bottom: 16px;
}

.letter-sign {
  margin-top: 24px;
  text-align: right;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 18px;
  color: #7a4d00;
}

/* BOOK DETAIL PAGE */
.book-hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 48px;
}

@media (min-width: 840px) {
  .book-hero-layout {
    grid-template-columns: 360px 1fr;
    gap: 48px;
  }
}

.book-sticky-col {
  position: sticky;
  top: 90px;
  text-align: center;
}

.book-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0;
}

.meta-chip {
  background: var(--bg-card);
  border: 1px solid var(--rule);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-dark);
}

.toc-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 20px 0;
}

@media (min-width: 640px) {
  .toc-list {
    grid-template-columns: 1fr 1fr;
  }
}

.toc-item {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  transition: all 0.2s;
}

.toc-item:hover {
  border-color: var(--primary);
  background: #fdfefe;
}

.toc-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 4px;
  display: block;
}

.toc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

.preview-callout {
  background: linear-gradient(135deg, #0e5a5e 0%, #07383a 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  margin: 40px 0;
  box-shadow: var(--shadow-md);
}

.preview-callout h3 {
  font-size: 24px;
  color: #fff;
  margin: 0 0 8px;
}

.preview-callout p {
  color: #c9e3e5;
  font-size: 15px;
  margin: 0 0 20px;
}

/* =====================================================================
   CLEAN STRAIGHT BOOK WITH GENTLE WIGGLE ANIMATION (NO 3D, NO OVERLAY BADGES)
   ===================================================================== */
.book-stand-straight {
  position: relative;
  display: inline-block;
  border-radius: 14px;
  box-shadow: 0 16px 32px rgba(11, 63, 68, 0.16), 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  background: #fff;
  border: 1px solid rgba(0,0,0,0.06);
  user-select: none;
}

.book-stand-straight img {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
  border-radius: 14px;
}

@media (min-width: 480px) {
  .book-stand-straight img {
    max-width: 290px;
  }
}

.book-stand-straight:hover,
.book-stand-straight:active,
.book-stand-straight.wiggle {
  animation: gentle-wiggle 0.6s ease-in-out;
  box-shadow: 0 22px 44px rgba(11, 63, 68, 0.24);
}

@keyframes gentle-wiggle {
  0% { transform: translateY(0) rotate(0deg); }
  20% { transform: translateY(-4px) rotate(-2deg); }
  40% { transform: translateY(-4px) rotate(2deg); }
  60% { transform: translateY(-2px) rotate(-1deg); }
  80% { transform: translateY(-1px) rotate(1deg); }
  100% { transform: translateY(0) rotate(0deg); }
}

/* 2 PROMINENT BOOK SHOWCASE CARDS (HOMEPAGE) */
.books-showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin: 36px 0;
}

@media (min-width: 840px) {
  .books-showcase-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

.book-showcase-card {
  background: #fff;
  border: 2px solid var(--rule);
  border-radius: 20px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

.book-showcase-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.book-showcase-card.card-book2:hover {
  border-color: var(--accent);
}

.showcase-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.card-book2 .showcase-badge {
  color: #8c5600;
  background: #fef3d6;
}

.showcase-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin: 20px 0 6px;
  line-height: 1.3;
}

.showcase-sub {
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 16px;
  line-height: 1.45;
}

.showcase-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-light);
  width: 100%;
}

.showcase-bullets li {
  position: relative;
  padding-left: 22px;
}

.showcase-bullets li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--primary);
  font-weight: 700;
}

.card-book2 .showcase-bullets li::before {
  color: var(--accent-dark);
}

.showcase-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  margin-top: auto;
}

@media (min-width: 440px) {
  .showcase-actions {
    flex-direction: row;
  }
  .showcase-actions .btn {
    flex: 1;
  }
}

/* 6 ANONYMIZED COGNITIVE FEEDBACK CARDS */
.feedback-section {
  background: #fdfaf6;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 64px 0;
}

.feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 36px;
}

@media (min-width: 640px) {
  .feedback-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .feedback-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.fb-card {
  background: #fff;
  border: 1.5px solid var(--rule);
  border-radius: 14px;
  padding: 20px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.fb-card:hover, .fb-card.expanded {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  background: #fff;
}

.fb-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.fb-author-tag {
  font-size: 12px;
  font-weight: 700;
  color: #0e5a5e;
  background: #eef7f6;
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.fb-stars {
  color: #f59e0b;
  font-size: 13px;
  letter-spacing: 1px;
}

.fb-quote-highlight {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
  margin: 0 0 10px;
}

.fb-detail-text {
  font-size: 13px;
  color: var(--ink-light);
  line-height: 1.6;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.3s ease, margin 0.3s ease;
  margin-top: 0;
}

.fb-card:hover .fb-detail-text,
.fb-card.expanded .fb-detail-text {
  max-height: 260px;
  opacity: 1;
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--rule);
}

.fb-hint {
  font-size: 11px;
  color: var(--ink-muted);
  margin-top: auto;
  padding-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.fb-card:hover .fb-hint,
.fb-card.expanded .fb-hint {
  color: var(--primary);
  font-weight: 600;
}




/* SÁCH CHI TIẾT - HERO & BỐ CỤC MỚI THEO CHIỀU NGANG */
.book-intro-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.book-quote-box {
  background: #f0f9f8;
  border-left: 3.5px solid var(--primary);
  border-radius: 10px;
  padding: 16px 20px;
  margin-top: 20px;
  font-size: 14.5px;
  line-height: 1.65;
  color: #07383a;
}

.book-quote-box strong {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--primary);
}

/* 4 ĐIỂM NỔI BẬT NẰM NGANG RỘNG RÃI */
.book-highlights-section {
  margin: 48px 0 36px;
  padding-top: 36px;
  border-top: 1px solid var(--rule);
}

.highlights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

@media (min-width: 600px) {
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .highlights-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.highlight-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 22px 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.highlight-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.hl-icon {
  font-size: 32px;
  line-height: 1;
  margin-bottom: 12px;
}

.hl-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 0 8px;
  line-height: 1.35;
}

.hl-desc {
  font-size: 13.5px;
  color: var(--ink-light);
  line-height: 1.6;
  margin: 0;
}

/* BẢNG ĐỐI CHIẾU NẰM NGANG RỘNG RÃI */
.contrast-section {
  margin: 48px 0 36px;
  padding-top: 36px;
  border-top: 1px solid var(--rule);
}

.contrast-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.contrast-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

@media (min-width: 680px) {
  .contrast-card {
    grid-template-columns: 1fr 40px 1.25fr;
    align-items: center;
    gap: 16px;
  }
}

.contrast-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.contrast-bad {
  background: #fdf2f2;
  border-left: 3.5px solid #ef4444;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  color: #7f1d1d;
  line-height: 1.55;
}

.contrast-bad strong {
  display: block;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #b91c1c;
  margin-bottom: 4px;
}

.contrast-arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--primary);
  font-size: 20px;
  font-weight: 700;
}

.contrast-good {
  background: #f0f9f8;
  border-left: 3.5px solid var(--primary);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  color: #07383a;
  line-height: 1.55;
}

.contrast-good strong {
  display: block;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 4px;
}


/* =====================================================================
   PAGE BANNER (TIÊU ĐỀ TRANG CĂN CHÍNH GIỮA)
   ===================================================================== */
.page-banner {
  background: linear-gradient(180deg, #f0f7f7 0%, var(--bg-page) 100%);
  padding: 40px 0 32px;
  border-bottom: 1px solid var(--rule);
  text-align: center;
}

.page-banner .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-muted);
  margin: 0 auto 12px;
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

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

.pill-tag {
  display: inline-block;
  margin: 0 auto 10px;
}

.page-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0 auto 10px;
  line-height: 1.25;
  text-align: center;
  max-width: 840px;
}

@media (min-width: 768px) {
  .page-title {
    font-size: 40px;
  }
}

.page-subtitle {
  font-size: 15.5px;
  color: var(--ink-light);
  line-height: 1.65;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}


/* =====================================================================
   HEADER NAVIGATION (LINK MENU RA CHÍNH GIỮA CÂN ĐỐI)
   ===================================================================== */
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 900px) {
  .nav-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
  }

  .brand {
    justify-self: start;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
    justify-self: center;
  }

  .nav-actions {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: 12px;
  }

  .mobile-menu-toggle {
    display: none;
  }
}

@media (max-width: 899px) {
  .nav-links {
    display: none;
  }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .mobile-menu-toggle {
    display: flex;
  }
}

@media (max-width: 599px) {
  .nav-actions .btn {
    display: none;
  }
}

/* ===== Huy hiệu tròn -30% góc phải bìa sách ===== */
.sale-sticker {
  position: absolute;
  top: -14px;
  right: -14px;
  z-index: 3;
  width: 66px;
  height: 66px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 30%, #ff6b4a, #d62d20 70%);
  color: #fff;
  text-decoration: none;
  line-height: 1;
  border: 3px solid #fff;
  box-shadow: 0 6px 16px rgba(214, 45, 32, 0.4);
  transform: rotate(12deg);
  animation: sticker-pulse 2.2s ease-in-out infinite;
  will-change: transform;
}
.sale-sticker strong { font-size: 19px; font-weight: 800; letter-spacing: -0.5px; }
.sale-sticker span { font-size: 9px; font-weight: 700; text-transform: uppercase; margin-top: 3px; }
.sale-sticker:hover { animation-play-state: paused; transform: rotate(0deg) scale(1.08); }
@keyframes sticker-pulse {
  0%, 100% { transform: rotate(12deg) scale(1); }
  50% { transform: rotate(12deg) scale(1.08); }
}
@media (max-width: 640px) {
  .sale-sticker { width: 54px; height: 54px; top: -10px; right: -10px; }
  .sale-sticker strong { font-size: 16px; }
  .sale-sticker span { font-size: 8px; }
}
@media (prefers-reduced-motion: reduce) { .sale-sticker { animation: none; } }

/* ===== Chọn hình thức thanh toán sách giấy ===== */
.pay-method-options { display: grid; gap: 10px; margin-top: 6px; }
.pay-method-option {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 16px; border: 2px solid #d3dee8; border-radius: 12px;
  background: #fff; cursor: pointer; transition: border-color .2s, background .2s;
}
.pay-method-option input[type="radio"] { width: 18px; height: 18px; min-height: 0; margin: 2px 0 0; padding: 0; border: 0; box-shadow: none; accent-color: #0e5a5e; flex-shrink: 0; }
.pay-method-option > div { flex: 1; min-width: 0; }
.pay-method-option { font-weight: 400; }
.pay-method-option strong { display: block; color: #1a2628; font-size: 15px; }
.pay-method-option small { display: block; color: #5b6b6d; font-size: 13px; margin-top: 3px; line-height: 1.45; }
.pay-method-option:has(input:checked) { border-color: #0e5a5e; background: #eef7f6; }
.pay-method-gift { display: inline-block; margin-top: 6px; padding: 2px 8px; border-radius: 999px; background: #e8a93a; color: #fff; font-size: 11px; font-weight: 700; }

/* ===== Tối ưu cuộn mượt trên điện thoại ===== */
@media (max-width: 900px) {
  /* Làm mờ nền (backdrop-filter) trên thanh dính là nguyên nhân giật khi cuộn ở máy yếu */
  .nav { background: #fff; backdrop-filter: none; -webkit-backdrop-filter: none; }
  .floating-badge { backdrop-filter: none; }
  .modal-backdrop, [class*="backdrop"] { backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
.form-group label.pay-method-option { display: flex; flex-direction: row; align-items: flex-start; gap: 12px; margin: 0; text-transform: none; letter-spacing: 0; }

/* ===== Khung thông tin chuyển khoản (VietQR) ===== */
.qr-frame img { max-width: 100%; height: auto; }
.qr-pulse { display: none; }
.bank-details {
  display: grid;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 16px;
}
.bank-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--rule);
}
.bank-row:last-child { border-bottom: 0; padding-bottom: 0; }
.row-label { font-size: 12px; color: var(--ink-muted); }
.row-val { font-size: 15px; color: var(--ink); word-break: break-all; }
.copy-box { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.copy-box .btn-copy { display: inline-flex; align-items: center; gap: 4px; flex-shrink: 0; padding: 6px 10px; font-size: 12px; }
.highlight-num { font-size: 17px; letter-spacing: 0.5px; }
.price-red { color: var(--danger); font-size: 19px; font-weight: 800; }
.code-box {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 17px;
  letter-spacing: 1px;
  color: var(--primary);
  background: var(--accent-light);
  border: 1px dashed var(--accent);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
}
.pay-status-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  padding: 12px 16px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-align: left;
}
.spinner {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border: 3px solid rgba(14, 90, 94, 0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.pay-actions { text-align: center; margin-top: 16px; }
/* Chặn cuộn ngang trên điện thoại (clip không phá thanh menu dính như hidden) */
html, body { overflow-x: clip; }

/* =====================================================================
   KHỐI GIÁ "CHỌN PHIÊN BẢN CỦA BẠN" (trang Cuốn 1 / Cuốn 2)
   ===================================================================== */
.vp-from { margin: 4px 0 6px; font-size: 15px; color: var(--ink-light); }
.vp-from strong { font-size: 24px; color: var(--danger); font-weight: 800; }
.vp-from del { color: var(--ink-muted); margin-left: 4px; }
.vp-pricing {
  position: relative; overflow: hidden; margin: 44px 0;
  padding: 44px 24px; border-radius: 18px; color: var(--ink);
  background: linear-gradient(160deg, var(--primary-dark) 0%, var(--primary) 100%);
  box-shadow: 0 20px 48px rgba(14,90,94,0.22); scroll-margin-top: 90px;
}
.vp-pricing::before {
  content: ""; position: absolute; right: -80px; bottom: -120px; width: 320px; height: 320px;
  border-radius: 50%; background: radial-gradient(circle, rgba(232,169,58,0.22), transparent 70%);
}
.vp-eyebrow { position: relative; text-align: center; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.vp-title { position: relative; text-align: center; font-family: var(--font-serif); color: #fff; font-size: 30px; margin: 6px 0 28px; line-height: 1.25; }
.vp-cards { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 860px; margin: 0 auto; }
.vp-card {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--rule-teal);
  border-top: 4px solid var(--accent); border-radius: 14px; padding: 26px 24px; box-shadow: 0 12px 32px rgba(0,0,0,0.14);
}
.vp-lbl { color: var(--accent-dark); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.vp-price { font-family: var(--font-serif); color: var(--primary-dark); font-size: 40px; font-weight: 700; margin-top: 8px; line-height: 1.1; }
.vp-old { color: var(--ink-muted); font-size: 14px; margin-top: 4px; }
.vp-old del { margin-right: 8px; }
.vp-off { background: var(--danger); color: #fff; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 99px; }
.vp-sub { font-size: 13px; color: var(--ink-muted); margin: 8px 0 16px; padding-bottom: 16px; border-bottom: 1px solid var(--rule); }
.vp-list { list-style: none; padding: 0; margin: 0 0 22px; flex: 1; }
.vp-list li { position: relative; font-size: 14.5px; padding: 5px 0 5px 28px; color: var(--ink); }
.vp-list li::before {
  content: "✓"; position: absolute; left: 0; top: 7px; width: 18px; height: 18px; line-height: 18px; text-align: center;
  font-size: 11px; font-weight: 800; border-radius: 50%; background: var(--primary-light); color: var(--primary);
}
.vp-btn {
  display: block; text-align: center; background: var(--accent); color: var(--primary-dark); font-weight: 800; font-size: 13px;
  letter-spacing: .08em; padding: 15px; border-radius: 10px; text-decoration: none; box-shadow: 0 6px 16px rgba(232,169,58,0.35);
  transition: background .2s, color .2s;
}
.vp-btn:hover { background: var(--accent-dark); color: #fff; }
@media (max-width: 720px) {
  .vp-cards { grid-template-columns: 1fr; }
  .vp-title { font-size: 24px; }
  .vp-pricing { padding: 34px 16px; }
}

/* =====================================================================
   TRANG ĐẶT HÀNG: CHỌN THEO TỪNG CUỐN
   ===================================================================== */
.bk-step { margin: 0 0 10px; font-weight: 700; color: var(--primary-dark); font-size: 15px; }
.bk-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 20px; }
.bk-tab {
  display: flex; align-items: center; gap: 10px; text-align: left; padding: 10px; cursor: pointer; font: inherit;
  background: #fff; border: 2px solid var(--rule); border-radius: 12px; transition: border-color .2s, background .2s;
}
.bk-tab:hover { border-color: var(--rule-teal); }
.bk-tab.active { border-color: var(--primary); background: var(--primary-light); }
.bk-tab-covers { display: flex; gap: 2px; flex-shrink: 0; }
.bk-tab-covers img { width: 38px; height: auto; border-radius: 3px; box-shadow: 0 2px 6px rgba(0,0,0,.15); }
.bk-tab-covers.two img { width: 24px; }
.bk-tab b { display: block; font-size: 13px; line-height: 1.35; color: var(--primary-dark); }
.bk-tab span { font-size: 12px; color: var(--ink-muted); }
.bk-panel {
  display: grid; grid-template-columns: 150px 1fr; gap: 20px; align-items: start;
  background: var(--bg-card); border: 1px solid var(--rule); border-radius: 14px; padding: 18px; margin-bottom: 22px;
}
.bk-covers { display: flex; gap: 6px; }
.bk-covers img { width: 100%; height: auto; border-radius: 4px; box-shadow: 0 8px 20px rgba(0,0,0,.15); }
.bk-covers.two img { width: calc(50% - 3px); }
.bk-name { margin: 0 0 12px; font-family: var(--font-serif); color: var(--primary-dark); font-size: 20px; line-height: 1.3; }
.bk-formats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.bk-format {
  text-align: left; cursor: pointer; font: inherit; color: inherit; background: #fff; border: 2px solid var(--rule);
  border-radius: 12px; padding: 14px; transition: border-color .2s, box-shadow .2s;
}
.bk-format:hover { border-color: var(--rule-teal); }
.bk-format.active { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,90,94,.12); }
.bk-format .k { display: block; font-size: 11px; font-weight: 800; color: var(--accent-dark); letter-spacing: .08em; }
.bk-format .p { display: block; font-size: 22px; font-weight: 800; color: var(--danger); margin-top: 4px; }
.bk-format .p del { color: var(--ink-muted); font-size: 13px; font-weight: 500; margin-left: 6px; }
.bk-format .d { display: block; font-size: 12.5px; color: var(--ink-muted); margin-top: 4px; line-height: 1.45; }
@media (max-width: 720px) {
  .bk-tabs, .bk-formats { grid-template-columns: 1fr; }
  .bk-panel { grid-template-columns: 1fr; }
  .bk-covers { max-width: 140px; }
}