/* Brand Expand - Shared Styles */
/* Fonts loaded via preconnect in HTML head */

:root {
  --black: #1a1a2e;
  --white: #fefefe;
  --grey-100: #f8f9fa;
  --grey-200: #e9ecef;
  --grey-300: #dee2e6;
  --grey-400: #adb5bd;
  --grey-500: #6c757d;
  --grey-600: #495057;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--white); color: var(--black); line-height: 1.7; }

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(254,254,254,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--grey-200);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--black);
  text-decoration: none;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a { color: var(--grey-600); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
.nav-links a:hover { color: var(--accent); }
.nav-buttons { display: flex; gap: 0.75rem; align-items: center; }
.nav-login {
  color: var(--grey-600);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border: 1px solid var(--grey-300);
  border-radius: 8px;
}
.nav-login:hover { border-color: var(--accent); color: var(--accent); }
.nav-cta {
  background: var(--accent);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
}
@media (max-width: 768px) {
  .nav-links, .nav-login { display: none; }
}

/* Article Header */
.article-header {
  padding: 10rem 2rem 4rem;
  text-align: center;
  background: linear-gradient(135deg, var(--black) 0%, #2d2d5a 100%);
}
.article-category {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.article-header h1 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--white);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.article-meta { color: rgba(255,255,255,0.7); font-size: 0.9rem; }

/* Article Content */
.article-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 2rem;
}
.article-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  color: var(--grey-600);
}
.article-content h2 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--black);
}
.article-content h3 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--black);
}
.article-content ul, .article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}
.article-content li {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 0.5rem;
  color: var(--grey-600);
}
.article-content a { color: var(--accent); }
.article-content strong { color: var(--black); }
.back-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 2rem;
}
.callout {
  background: var(--grey-100);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: 0 8px 8px 0;
}
.callout p { margin: 0; font-size: 1rem; }

/* CTA Section */
.cta-section {
  padding: 5rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, var(--black) 0%, #2d2d5a 100%);
}
.cta-section h2 {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--white);
}
.cta-section p {
  color: rgba(255,255,255,0.8);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}
.cta-btn {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  padding: 1.25rem 3rem;
  text-decoration: none;
  font-weight: 600;
  border-radius: 10px;
}

/* Footer */
footer {
  background: var(--black);
  color: var(--white);
  padding: 4rem 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  max-width: 900px;
  margin: 0 auto;
}
.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
}
.footer-bottom p {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
}

@media (max-width: 768px) {
  .article-header h1 { font-size: 1.75rem; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
}