/* ==========================================================================
   CordCloud Literary Editorial Stylesheet
   Design Ethos: Literary Journal with Cloud Network Acceleration Services
   Palette: Cream Paper #FAF5EC | Navy Ink #14263F | Vermilion #D95336
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,400;1,9..144,600&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;1,6..72,400&family=Public+Sans:wght@500;700&display=swap');

:root {
  --color-paper: #FAF5EC;
  --color-paper-alt: #F3ECE0;
  --color-ink: #14263F;
  --color-ink-light: #344860;
  --color-ink-muted: #5B6D82;
  --color-vermilion: #D95336;
  --color-border: #14263F;
  --color-border-subtle: rgba(20, 38, 63, 0.2);
  
  --font-headline: 'Fraunces', 'Songti SC', 'STSong', 'SimSun', serif;
  --font-body: 'Newsreader', 'Songti SC', 'STSong', 'SimSun', serif;
  --font-label: 'Public Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --reading-width: 65ch;
  --container-max: 1120px;
}

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

html {
  font-size: 16px;
  background-color: var(--color-paper);
  color: var(--color-ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.75;
  background-color: var(--color-paper);
  color: var(--color-ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
  font-family: var(--font-headline);
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.35rem;
}

p {
  margin-bottom: 1.25rem;
  max-width: var(--reading-width);
}

p.lead {
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--color-ink-light);
}

/* Vermilion Italic Highlight for Headline Words */
.em-vermilion {
  color: var(--color-vermilion);
  font-style: italic;
  font-weight: 600;
}

/* Editorial Labels & Tags */
.label-tag {
  font-family: var(--font-label);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-ink-muted);
  display: inline-block;
  margin-bottom: 0.75rem;
}

.label-tag.vermilion {
  color: var(--color-vermilion);
}

/* Double Line Section Dividers */
.section-divider {
  width: 100%;
  border: 0;
  border-top: 3px double var(--color-border);
  margin: 0;
  clear: both;
}

.subtle-divider {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: 1.5rem 0;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Buttons - Straight corners, 1.5px navy border, cream background */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.875rem 1.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: 0;
  background-color: var(--color-paper);
  color: var(--color-ink);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 48px;
  line-height: 1;
}

.btn:hover, .btn:focus-visible {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.btn-primary {
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-vermilion);
  border-color: var(--color-vermilion);
  color: var(--color-paper);
}

.btn-secondary {
  border-color: var(--color-border);
}

.btn-sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.75rem;
  min-height: 38px;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 2rem;
}

/* Navigation & Masthead Header */
.site-header {
  border-bottom: 3px double var(--color-border);
  background-color: var(--color-paper);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-top-bar {
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 0.35rem 0;
  font-family: var(--font-label);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
}

/* Double Ring Seal Logo */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--color-ink);
}

.seal-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.brand-text {
  font-family: var(--font-headline);
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: -0.01em;
}

.brand-text span.brand-regular {
  font-weight: 700;
  color: var(--color-ink);
}

.brand-text em.brand-italic {
  font-style: italic;
  font-weight: 400;
  color: var(--color-vermilion);
  margin-left: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--color-ink);
  position: relative;
  padding-bottom: 2px;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--color-vermilion);
  transition: width 0.2s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-link.highlight {
  color: var(--color-vermilion);
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--color-border);
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-ink);
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-meta {
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-vermilion);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-meta::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 1.5px;
  background-color: var(--color-vermilion);
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-ink-light);
  margin-bottom: 1.5rem;
  max-width: var(--reading-width);
}

.hero-aside {
  border-left: 1px solid var(--color-border-subtle);
  padding-left: 2.5rem;
}

.editorial-note {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.editorial-note blockquote {
  font-style: italic;
  font-family: var(--font-headline);
  font-size: 1.15rem;
  color: var(--color-ink);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.meta-spec-list {
  list-style: none;
  margin-top: 1.5rem;
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.meta-spec-list li {
  padding: 0.45rem 0;
  border-bottom: 1px dashed var(--color-border-subtle);
  display: flex;
  justify-content: space-between;
}

.meta-spec-list li span:last-child {
  color: var(--color-ink);
  font-weight: 700;
}

/* Section Header Structure */
.section-intro {
  padding: 4.5rem 0 2.5rem;
}

.section-headline-wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
  margin-bottom: 3rem;
}

.section-number {
  font-family: var(--font-label);
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-vermilion);
  font-weight: 700;
}

/* Advantages Section: 3 Text-Image Cards (Literary Columns, No Box Shadows) */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  padding-bottom: 4.5rem;
}

.advantage-item {
  border-top: 2px solid var(--color-border);
  padding-top: 1.5rem;
}

.advantage-index {
  font-family: var(--font-label);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-vermilion);
  margin-bottom: 0.75rem;
}

.advantage-title {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  line-height: 1.35;
}

.advantage-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-ink-light);
  margin-bottom: 1.25rem;
}

.advantage-graphic {
  width: 100%;
  height: 160px;
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-paper-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.25rem;
  overflow: hidden;
}

.advantage-graphic svg {
  max-width: 100%;
  max-height: 100%;
}

/* Streaming & AI Support Matrix Section */
.media-ai-section {
  padding: 4.5rem 0;
}

.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.matrix-column {
  border: 1px solid var(--color-border);
  padding: 2.5rem;
  background-color: var(--color-paper);
}

.matrix-column-header {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.matrix-items-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.matrix-item {
  border: 1px solid var(--color-border-subtle);
  padding: 0.875rem 1rem;
  background-color: var(--color-paper-alt);
  display: flex;
  flex-direction: column;
}

.matrix-item-name {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-ink);
}

.matrix-item-badge {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-vermilion);
  margin-top: 0.25rem;
  font-weight: 700;
}

/* Pricing Table Section */
.pricing-section {
  padding: 4.5rem 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2.5rem;
}

.pricing-tier {
  border: 1.5px solid var(--color-border);
  padding: 2.5rem 2rem;
  background-color: var(--color-paper);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-tier.featured {
  border-width: 2.5px;
  background-color: var(--color-paper-alt);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 1.5rem;
  background-color: var(--color-vermilion);
  color: var(--color-paper);
  font-family: var(--font-label);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.65rem;
}

.tier-name {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.tier-intro {
  font-size: 0.95rem;
  color: var(--color-ink-muted);
  margin-bottom: 1.5rem;
  min-height: 2.7rem;
}

.tier-price {
  font-family: var(--font-headline);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.tier-price-unit {
  font-size: 0.9rem;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-ink-muted);
}

.tier-billing-cycle {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-vermilion);
  margin-bottom: 2rem;
}

.tier-features {
  list-style: none;
  margin-bottom: 2.5rem;
  border-top: 1px solid var(--color-border-subtle);
}

.tier-features li {
  padding: 0.75rem 0;
  border-bottom: 1px dashed var(--color-border-subtle);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tier-features li::before {
  content: '✓';
  color: var(--color-vermilion);
  font-weight: bold;
}

/* User Reviews / Testimonials Section */
.reviews-section {
  padding: 4.5rem 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  margin-top: 2rem;
}

.review-item {
  border-top: 1.5px solid var(--color-border);
  padding-top: 1.5rem;
}

.review-quote {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-ink-light);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.review-author {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-ink);
}

.review-meta {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* FAQ Section */
.faq-section {
  padding: 4.5rem 0 6rem;
}

.faq-list {
  margin-top: 2rem;
  border-top: 1.5px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border-subtle);
  padding: 1.75rem 0;
}

.faq-question {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.faq-q-badge {
  font-family: var(--font-label);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-vermilion);
}

.faq-answer {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-ink-light);
  padding-left: 1.75rem;
}

/* Footer Section - ONLY 4 Links as strictly requested */
.site-footer {
  border-top: 3px double var(--color-border);
  background-color: var(--color-paper);
  padding: 4rem 0 3.5rem;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-nav-list {
  display: flex;
  list-style: none;
  gap: 3rem;
  align-items: center;
  padding: 0;
  margin: 0;
}

.footer-nav-link {
  font-family: var(--font-headline);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  padding-bottom: 4px;
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.footer-nav-link:hover, .footer-nav-link:focus-visible {
  color: var(--color-vermilion);
  border-bottom-color: var(--color-vermilion);
}

.footer-colophon {
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

/* Literary Editorial Article Page Styles */
.article-header {
  padding: 4.5rem 0 2.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 3rem;
}

.article-content {
  max-width: var(--reading-width);
  margin: 0 auto 5rem;
  font-size: 1.125rem;
  line-height: 1.85;
}

.article-content h2 {
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: 0.5rem;
}

.article-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-content a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-vermilion);
  text-underline-offset: 4px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.article-content a:hover {
  color: var(--color-vermilion);
}

.article-content blockquote {
  border-left: 3px solid var(--color-vermilion);
  padding-left: 1.5rem;
  font-style: italic;
  margin: 2rem 0;
  color: var(--color-ink-light);
}

.article-meta-bar {
  display: flex;
  gap: 2rem;
  font-family: var(--font-label);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin-top: 1.5rem;
}

/* Responsive Mobile Rules */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-aside {
    border-left: none;
    border-top: 1px solid var(--color-border-subtle);
    padding-left: 0;
    padding-top: 2rem;
  }
  .advantages-grid, .pricing-grid, .reviews-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .matrix-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }
  .container {
    padding: 0 1.25rem;
  }
  .nav-container {
    flex-wrap: wrap;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-top: 1.25rem;
    gap: 1rem;
    border-top: 1px solid var(--color-border-subtle);
    margin-top: 1rem;
  }
  .nav-links.open {
    display: flex;
  }
  .hero-section {
    padding: 3rem 0;
  }
  .matrix-items-list {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
  }
  .footer-nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }
  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .btn {
    width: 100%;
    text-align: center;
  }
}