/* ==============================================================================
   NYRIXA LEARNING — DESIGN SYSTEM & EDITORIAL STYLESHEET
   Brand: NYRIXA LEARNING | Parent: D6 MEDIA STUDIO
   Colors: Navy (#142B4A), Blue (#2563EB), Teal (#399B88), Slate (#334155)
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Manrope:wght@600;700;800&display=swap');

:root {
  --navy: #142B4A;
  --navy-light: #1E3A5F;
  --navy-dark: #0D1C30;
  --blue: #2563EB;
  --blue-hover: #1D4ED8;
  --teal: #399B88;
  --teal-light: #EBF7F4;
  --white: #FFFFFF;
  --bg-light: #F5F7FA;
  --bg-subtle: #EDF2F7;
  --text-main: #334155;
  --text-muted: #64748B;
  --text-dark: #0F172A;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --shadow-sm: 0 1px 2px rgba(20, 43, 74, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(20, 43, 74, 0.06), 0 2px 4px -2px rgba(20, 43, 74, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(20, 43, 74, 0.08), 0 4px 6px -4px rgba(20, 43, 74, 0.03);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --container-max: 1200px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-main);
  background-color: var(--white);
  line-height: 1.65;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Manrope', 'Inter', sans-serif;
  color: var(--navy);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  margin-bottom: 1.2rem;
}

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--blue-hover);
}

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

/* Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-alt {
  background-color: var(--bg-light);
}

.section-navy {
  background-color: var(--navy);
  color: #E2E8F0;
}
.section-navy h2, .section-navy h3 {
  color: var(--white);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 4px;
  background-color: var(--teal-light);
  color: var(--teal);
}

.badge-blue {
  background-color: #EFF6FF;
  color: var(--blue);
}

.badge-navy {
  background-color: var(--navy);
  color: var(--white);
}

.badge-outline {
  background-color: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

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

.brand-logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

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

.brand-name {
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--navy);
  line-height: 1;
}

.brand-sub {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--teal);
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  padding: 6px 0;
}

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

.nav-btn-access {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  background-color: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-btn-access:hover {
  background-color: #E2E8F0;
  color: var(--navy-dark);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--navy);
}

/* Hero Section */
.hero {
  padding: 84px 0 72px 0;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.hero-eyebrow-text {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--navy);
  line-height: 1.12;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--blue);
  color: var(--white) !important;
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--blue);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background-color: var(--blue-hover);
  border-color: var(--blue-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--white);
  color: var(--navy) !important;
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--bg-light);
  border-color: var(--navy);
}

.hero-trust-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-item svg {
  color: var(--teal);
  flex-shrink: 0;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.book-card-hero {
  position: relative;
  background: var(--white);
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 32px rgba(20, 43, 74, 0.08);
  max-width: 400px;
  width: 100%;
}

.book-card-hero img {
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.hero-price-pill {
  position: absolute;
  top: 30px;
  right: -10px;
  background: var(--navy);
  color: var(--white);
  padding: 8px 18px;
  border-radius: 40px;
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(20, 43, 74, 0.2);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px auto;
}

.section-header.text-left {
  text-align: left;
  margin-left: 0;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.section-lead {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Featured Product Section */
.product-showcase {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.product-showcase-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 56px;
  align-items: start;
}

.product-media {
  position: sticky;
  top: 100px;
}

.cover-wrapper {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.cover-wrapper img {
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(20, 43, 74, 0.1);
  margin: 0 auto;
}

.preview-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 16px;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  background: var(--white);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--navy);
  cursor: pointer;
  transition: all 0.2s ease;
}

.preview-action-btn:hover {
  background: #F1F5F9;
  border-color: var(--blue);
  color: var(--blue);
}

.product-details {
  display: flex;
  flex-direction: column;
}

.product-edition-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  align-self: flex-start;
  margin-bottom: 12px;
}

.product-main-title {
  font-size: 2.5rem;
  line-height: 1.15;
  margin-bottom: 8px;
}

.product-subtitle {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.product-price-box {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 24px;
  background-color: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.price-main {
  font-family: 'Manrope', sans-serif;
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.price-tag-note {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--teal);
  background: var(--teal-light);
  padding: 4px 10px;
  border-radius: 4px;
}

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

.benefit-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #FAFAFA;
}

.benefit-icon {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: #EFF6FF;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
  font-size: 0.85rem;
}

.benefit-title {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--navy);
  margin-bottom: 2px;
}

.benefit-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

.product-cta-bar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-buy-full {
  width: 100%;
  padding: 16px 24px;
  font-size: 1.1rem;
}

.guarantee-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* Curriculum / 12 Chapters */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.chapter-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

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

.chapter-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.chapter-number {
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--blue);
  letter-spacing: 0.05em;
}

.chapter-pages {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-light);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

.chapter-title {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--navy);
}

.chapter-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Bonus Resources */
.bonus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bonus-box {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 4px solid var(--teal);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.bonus-tag {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.bonus-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.bonus-items {
  list-style: none;
  margin-top: 14px;
  font-size: 0.86rem;
}

.bonus-items li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  color: var(--text-main);
}

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

/* Target Audience: Who Is This For? */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.audience-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.audience-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy);
  margin-bottom: 18px;
}

.audience-name {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.audience-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

/* Product Preview Section */
.preview-carousel-wrap {
  position: relative;
  background: var(--navy);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: var(--white);
}

.preview-stage {
  display: flex;
  gap: 32px;
  align-items: center;
}

.preview-sheet-frame {
  flex: 0 0 460px;
  background: var(--white);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: transform 0.2s ease;
}

.preview-sheet-frame:hover {
  transform: scale(1.02);
}

.preview-sheet-frame img {
  width: 100%;
  display: block;
}

.preview-meta {
  flex: 1;
}

.preview-meta-tag {
  color: var(--teal);
  font-weight: 700;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.preview-meta h3 {
  font-size: 1.85rem;
  color: var(--white);
  margin-bottom: 16px;
}

.preview-meta p {
  font-size: 0.98rem;
  color: #94A3B8;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* Curated 5-Page Preview Controls */
.preview-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.preview-nav-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preview-tab-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #CBD5E1;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.preview-tab-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.preview-tab-btn:hover:not(.active) {
  background: rgba(255, 255, 255, 0.16);
  color: var(--white);
}

.preview-pager {
  display: flex;
  align-items: center;
  gap: 12px;
}

.preview-nav-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.preview-nav-btn:hover:not(:disabled) {
  background: var(--blue);
  border-color: var(--blue);
}

.preview-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.preview-page-counter {
  font-size: 0.82rem;
  font-weight: 600;
  color: #94A3B8;
  letter-spacing: 0.05em;
}

.preview-watermark-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(57, 155, 136, 0.15);
  border: 1px solid rgba(57, 155, 136, 0.35);
  color: #5EEAD4;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 4px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.preview-zoom-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #E2E8F0;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin-top: 14px;
  transition: all 0.2s ease;
}

.preview-zoom-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #FFFFFF;
  color: #FFFFFF;
}

/* FAQ Accordion */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--navy);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}

.faq-question:hover {
  color: var(--blue);
}

.faq-icon {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Brand Tagline Statement */
.brand-tagline-statement {
  font-family: 'Manrope', 'Inter', sans-serif;
  font-weight: 600;
  color: var(--navy);
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-align: center;
  margin-top: 28px;
}

/* Footer */
.footer {
  background-color: var(--navy-dark);
  color: #94A3B8;
  padding: 72px 0 36px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand-col h4 {
  color: var(--white);
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.footer-descriptor {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--teal);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-brand-col p {
  font-size: 0.88rem;
  line-height: 1.6;
  max-width: 380px;
}

.footer-col h5 {
  color: var(--white);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.88rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

.footer-bottom a {
  color: #94A3B8;
}

/* Modal Dialogs */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 36px;
  position: relative;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  max-height: 90vh;
  overflow-y: auto;
}

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

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s ease;
}

.form-control:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.order-summary-box {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.summary-row.total {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  margin-top: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--navy);
}

/* Lightbox preview modal */
.lightbox-card {
  background: #0B1320;
  border-radius: var(--radius-md);
  max-width: 900px;
  width: 100%;
  padding: 24px;
  position: relative;
  text-align: center;
}

.lightbox-img {
  max-height: 80vh;
  margin: 0 auto;
  border-radius: 4px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.lightbox-caption {
  color: #94A3B8;
  margin-top: 14px;
  font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content {
    max-width: 100%;
  }
  .product-showcase-grid {
    grid-template-columns: 1fr;
  }
  .product-media {
    position: static;
    max-width: 420px;
    margin: 0 auto;
  }
  .chapters-grid, .bonus-grid, .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .preview-stage {
    flex-direction: column;
  }
  .preview-sheet-frame {
    flex: 0 0 auto;
    max-width: 380px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .hero-title {
    font-size: 2.35rem;
  }
  .product-showcase {
    padding: 24px;
  }
  .chapters-grid, .bonus-grid, .audience-grid {
    grid-template-columns: 1fr;
  }
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .preview-carousel-wrap {
    padding: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}