/* Airplaten SEO Pages — Shared Styles */
/* Mirrors the SPA brand: dark theme, minimal, technical */

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

:root {
  --color-bg: #0a0a0a;
  --color-bg-secondary: #111111;
  --color-bg-card: #161616;
  --color-surface: #1e1e1e;
  --color-border: #2a2a2a;
  --color-border-light: #333333;
  --color-text: #f0f0f0;
  --color-text-secondary: #888888;
  --color-text-muted: #555555;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-success: #10b981;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  --max-width: 1200px;
  --container-px: clamp(1rem, 5vw, 3rem);
  --radius: 0.5rem;
  --radius-md: 0.75rem;
}

html { scroll-behavior: smooth; }

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

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

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

/* Header */
.seo-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

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

.seo-header-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.025em;
}

.seo-header-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  list-style: none;
}

.seo-header-nav a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  transition: color 0.15s;
}

.seo-header-nav a:hover { color: var(--color-text); text-decoration: none; }

/* Hero section */
.seo-hero {
  padding: 5rem 0 3rem;
  text-align: center;
}

.seo-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.seo-hero p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 2rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  text-decoration: none;
}

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

.btn-secondary:hover {
  border-color: var(--color-text-secondary);
  text-decoration: none;
}

.btn-lg { padding: 0.875rem 2rem; font-size: 1rem; }

.cta-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Content sections */
.seo-section {
  padding: 4rem 0;
}

.seo-section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.seo-section h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

.seo-section p {
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
  max-width: 720px;
}

.seo-section ul, .seo-section ol {
  color: var(--color-text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.seo-section li { margin-bottom: 0.5rem; }

/* Comparison table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.875rem;
}

.comparison-table th,
.comparison-table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.comparison-table th {
  background: var(--color-bg-secondary);
  font-weight: 600;
  color: var(--color-text);
}

.comparison-table td {
  color: var(--color-text-secondary);
}

.comparison-table tr:nth-child(even) td {
  background: var(--color-bg-secondary);
}

/* Cards */
.seo-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.seo-card h3 {
  margin-top: 0;
  color: var(--color-text);
}

/* Stats strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding: 3rem 0;
}

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

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  display: block;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
}

.faq-item h3 {
  color: var(--color-text);
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

.faq-item p {
  margin: 0;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding: 1rem 0;
}

.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb span { margin: 0 0.5rem; }

/* Blog article styles */
.article-meta {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.article-body {
  max-width: 720px;
}

.article-body h2 {
  margin-top: 3rem;
}

.article-body p {
  max-width: none;
}

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Product grid (static) */
.seo-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.seo-product-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color 0.15s;
}

.seo-product-card:hover {
  border-color: var(--color-accent);
}

.seo-product-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.seo-product-card p {
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

/* Footer */
.seo-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
  margin-top: 4rem;
}

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

.seo-footer-brand {
  max-width: 300px;
}

.seo-footer-brand strong {
  font-size: 1.125rem;
  display: block;
  margin-bottom: 0.5rem;
}

.seo-footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.seo-footer-links {
  display: flex;
  gap: 3rem;
}

.seo-footer-col h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.seo-footer-col ul {
  list-style: none;
  padding: 0;
}

.seo-footer-col li { margin-bottom: 0.5rem; }

.seo-footer-col a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

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

.seo-footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* CTA Section */
.seo-cta {
  text-align: center;
  padding: 5rem 0;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  margin: 3rem 0;
}

.seo-cta h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.seo-cta p {
  max-width: 480px;
  margin: 0 auto 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .seo-header-nav { gap: 1rem; }
  .seo-footer-inner { flex-direction: column; }
  .seo-footer-links { gap: 2rem; }
  .seo-footer-bottom { flex-direction: column; gap: 0.5rem; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .seo-header-nav { display: none; }
  .cta-group { flex-direction: column; align-items: center; }
}