/* ==========================================================================
   Meridian Website — "Warm Brutalism" Design System
   Colors: Ink & Parchment palette from design spec
   Grid: Offset golden ratio (61.8% / 38.2%)
   Typography: Crimson Text (serif) + Inter (sans)
   ========================================================================== */

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

:root {
  /* Day Mode — Ink & Parchment */
  --bg-primary: #FAF9F6;
  --bg-secondary: #F2F0EB;
  --surface: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #6B6B6B;
  --accent: #C41E3A;
  --success: #2D5016;
  --border-light: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.12);

  /* Spacing — 4px baseline */
  --space-micro: 4px;
  --space-sm: 8px;
  --space-base: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-xxl: 104px;

  /* Typography */
  --font-serif: 'Crimson Text', Georgia, serif;
  --font-sans: 'Inter', -apple-system, system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.6;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
}

.display {
  font-size: 3rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.28rem; }

.text-secondary { color: var(--text-secondary); }
.text-small { font-size: 0.8rem; line-height: 1.5; }
.text-tiny {
  font-size: 0.64rem;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --- Layout --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xxl) 0;
}

.section + .section {
  border-top: 1px solid var(--border-light);
}

/* Golden ratio grid */
.grid-golden {
  display: grid;
  grid-template-columns: 61.8fr 38.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.grid-golden-reverse {
  display: grid;
  grid-template-columns: 38.2fr 61.8fr;
  gap: var(--space-xl);
  align-items: start;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

/* --- Buttons — "The Press" --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 150ms cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 150ms cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 8px 16px;
}

.btn-ghost:hover {
  color: var(--text-primary);
}

.btn-deploy {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  padding: 14px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  gap: 12px;
  min-width: 180px;
  justify-content: center;
}

.btn-deploy:hover {
  border-color: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.btn-deploy svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-light);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--text-primary);
  color: var(--bg-primary);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1;
  border-radius: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 150ms ease;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--text-primary);
  transition: width 200ms ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: transform 200ms ease, opacity 200ms ease;
}

/* --- Hero --- */
.hero {
  padding-top: calc(60px + var(--space-xxl));
  padding-bottom: var(--space-xxl);
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 720px;
}

.hero-label {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  gap: var(--space-base);
  align-items: center;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-meta-value {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  line-height: 1;
}

.hero-meta-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  padding: var(--space-lg);
  transition: border-color 150ms ease;
}

.card:hover {
  border-color: var(--border-medium);
}

.card-label {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.card h3 {
  margin-bottom: var(--space-sm);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* --- Feature Section --- */
.feature-block {
  padding: var(--space-xxl) 0;
}

.feature-block + .feature-block {
  border-top: 1px solid var(--border-light);
}

.feature-label {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: var(--space-base);
}

.feature-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2rem);
  line-height: 1.2;
  margin-bottom: var(--space-base);
  max-width: 540px;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: var(--space-md);
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.feature-list li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--text-primary);
  border-radius: 50%;
}

/* Image placeholder */
.image-placeholder {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
  overflow: hidden;
  position: relative;
}

.image-placeholder::before {
  content: '';
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--text-secondary);
  border-radius: 3px;
  opacity: 0.4;
}

.image-placeholder::after {
  content: attr(data-label);
  opacity: 0.6;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.image-placeholder-4-3 {
  aspect-ratio: 4 / 3;
}

/* --- Deploy Section --- */
.deploy-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-base);
  margin-top: var(--space-lg);
}

.deploy-card {
  flex: 1;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  padding: var(--space-md) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-base);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.deploy-card:hover {
  border-color: var(--border-medium);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.deploy-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.deploy-card-header svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.deploy-card-header span {
  font-weight: 500;
  font-size: 0.9375rem;
}

.deploy-card p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.5;
  flex: 1;
}

.deploy-card .btn {
  align-self: flex-start;
}

/* --- Comparison Table --- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.comparison-table th {
  text-align: left;
  font-weight: 500;
  padding: var(--space-base) var(--space-base);
  border-bottom: 2px solid var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
}

.comparison-table td {
  padding: var(--space-base) var(--space-base);
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table .highlight {
  font-weight: 600;
}

.check {
  color: var(--success);
  font-weight: 600;
}

.cross {
  color: var(--text-secondary);
  opacity: 0.5;
}

/* --- Code Block --- */
.code-block {
  background: var(--text-primary);
  color: #E8E8E6;
  padding: var(--space-md);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
}

.code-block .comment {
  color: #6B6B6B;
}

.code-block .string {
  color: #98C379;
}

.code-block .prompt {
  color: #8B8B8B;
  user-select: none;
}

/* --- Docs Section --- */
.docs-nav {
  position: sticky;
  top: 80px;
  align-self: start;
}

.docs-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.docs-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}

.docs-nav a:hover,
.docs-nav a.active {
  color: var(--text-primary);
  border-left-color: var(--text-primary);
}

.docs-content {
  max-width: 720px;
}

.docs-content h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-light);
}

.docs-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.docs-content h3 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-base);
}

.docs-content p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-base);
}

.docs-content .code-block {
  margin-bottom: var(--space-md);
}

.docs-content ul {
  list-style: none;
  margin-bottom: var(--space-md);
}

.docs-content ul li {
  padding: 6px 0 6px 20px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.docs-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 5px;
  height: 5px;
  background: var(--text-secondary);
  border-radius: 50%;
}

.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
}

.docs-content th {
  text-align: left;
  font-weight: 500;
  padding: var(--space-sm) var(--space-base);
  border-bottom: 2px solid var(--text-primary);
  font-size: 0.8rem;
}

.docs-content td {
  padding: var(--space-sm) var(--space-base);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.docs-content code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 2px;
}

.callout {
  background: var(--bg-secondary);
  border-left: 3px solid var(--text-primary);
  padding: var(--space-base) var(--space-md);
  margin-bottom: var(--space-md);
  border-radius: 0 3px 3px 0;
}

.callout p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

.callout-warn {
  border-left-color: #D97706;
}

.callout-success {
  border-left-color: var(--success);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border-light);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xxl);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-lg);
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.6;
  margin-top: var(--space-sm);
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: var(--space-base);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-col a {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: color 150ms ease;
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- Testimonial --- */
.testimonial {
  background: var(--bg-secondary);
  padding: var(--space-xxl) 0;
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.testimonial-card {
  padding: var(--space-lg);
}

.testimonial-card blockquote {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
  font-style: italic;
}

.testimonial-card cite {
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.cite-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border-medium);
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: var(--space-lg) 0;
}

.stats-grid {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-serif);
  font-size: 2rem;
  line-height: 1;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.6;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: var(--space-xxl) 0;
}

.cta-section h2 {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  margin-bottom: var(--space-base);
}

.cta-section p {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto var(--space-lg);
  font-size: 1rem;
}

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 720px;
  margin: var(--space-lg) auto 0;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  padding: var(--space-lg);
}

.pricing-card.featured {
  border-color: var(--text-primary);
  position: relative;
}

.pricing-card.featured::before {
  content: 'Recommended';
  position: absolute;
  top: -10px;
  left: var(--space-lg);
  background: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 2px;
}

.pricing-price {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 1;
  margin: var(--space-md) 0 var(--space-sm);
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-family: var(--font-sans);
}

.pricing-card h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.875rem;
}

.pricing-desc {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  margin-bottom: var(--space-md);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.pricing-features li {
  padding: 6px 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* --- Mobile Responsive --- */

/* Tablet */
@media (max-width: 1023px) {
  .grid-golden,
  .grid-golden-reverse {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .testimonial-card:last-child {
    display: none;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }

  .docs-nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: calc(60px + var(--space-xl));
    padding-bottom: var(--space-xl);
  }
}

/* Mobile */
@media (max-width: 767px) {
  :root {
    --space-xxl: 64px;
    --space-xl: 48px;
  }

  .display {
    font-size: 2.25rem;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-md);
    gap: 0;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: var(--space-base) 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 1rem;
  }

  .nav-links a::after {
    display: none;
  }

  .nav-mobile-toggle {
    display: block;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-card:last-child {
    display: block;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-meta {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .stats-grid {
    flex-wrap: wrap;
    gap: var(--space-lg);
  }

  .stat-item {
    flex: 0 0 40%;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .deploy-grid {
    flex-direction: column;
  }

  .deploy-card {
    min-width: auto;
  }

  .comparison-table {
    font-size: 0.75rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-sm);
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .code-block {
    font-size: 0.75rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Print */
@media print {
  .nav,
  .footer,
  .btn {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}