:root {
  --brand-primary: #1b3a5c;
  --brand-accent: #c5960c;
  --brand-light: #f0f4f8;
  --brand-dark: #0d1f33;
  --text: #1e293b;
  --text-light: #64748b;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.12);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --max-w: 1200px;
  --transition: .25s ease;
}

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

html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); line-height: 1.7; background: var(--white); -webkit-font-smoothing: antialiased; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--brand-accent); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ── Header ── */
.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color var(--transition), box-shadow var(--transition); }
.site-header.scrolled { border-bottom-color: #e2e8f0; box-shadow: var(--shadow); }
.header-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; color: var(--brand-primary); white-space: nowrap; }
.logo img { border-radius: 6px; }
.main-nav { list-style: none; display: flex; gap: 4px; }
.main-nav > li { position: relative; }
.main-nav > li > a { display: flex; align-items: center; gap: 4px; padding: 8px 14px; border-radius: 8px; font-size: .9rem; font-weight: 500; color: var(--text); transition: background var(--transition); }
.main-nav > li > a:hover { background: var(--brand-light); color: var(--brand-primary); }
.nav-arrow { font-size: .65rem; opacity: .5; }
.header-cta { padding: 8px 20px; background: var(--brand-primary); color: var(--white); border-radius: 8px; font-size: .85rem; font-weight: 600; transition: background var(--transition); }
.header-cta:hover { background: var(--brand-dark); color: var(--white); }

/* ── Mega Menu ── */
.mega-menu { position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%); background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-lg); border: 1px solid #e2e8f0; padding: 24px; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity var(--transition), visibility var(--transition); min-width: 480px; }
.main-nav > li:hover .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; }
.mega-menu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.mega-menu-col h4 { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-light); margin-bottom: 10px; }
.mega-menu-col a { display: block; padding: 5px 0; font-size: .88rem; color: var(--text); }
.mega-menu-col a:hover { color: var(--brand-primary); }

/* ── Hamburger ── */
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }

/* ── Mobile Nav ── */
.mobile-nav { position: fixed; top: 64px; left: 0; width: 100%; height: calc(100vh - 64px); background: var(--white); z-index: 999; overflow-y: auto; padding: 24px; transform: translateX(-100%); transition: transform .3s ease; }
.mobile-nav.active { transform: translateX(0); }
.mobile-nav-section { margin-bottom: 24px; }
.mobile-nav-section h4 { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-light); margin-bottom: 8px; }
.mobile-nav-section a { display: block; padding: 8px 0; font-size: .95rem; color: var(--text); border-bottom: 1px solid #f1f5f9; }

/* ── Hero ── */
.hero { padding: 120px 0 60px; background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-primary) 100%); color: var(--white); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 2.4rem; line-height: 1.2; font-weight: 800; margin-bottom: 20px; }
.hero h1 span { color: var(--brand-accent); }
.hero p { font-size: 1.05rem; opacity: .92; margin-bottom: 16px; line-height: 1.7; }
.hero-buttons { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: .95rem; transition: all var(--transition); cursor: pointer; border: 2px solid transparent; text-decoration: none; }
.btn-primary { background: var(--brand-accent); color: var(--brand-dark); }
.btn-primary:hover { background: #d4a30e; color: var(--brand-dark); }
.btn-white { background: var(--white); color: var(--brand-primary); }
.btn-white:hover { background: var(--brand-light); color: var(--brand-primary); }
.btn-outline { border-color: var(--brand-primary); color: var(--brand-primary); background: transparent; }
.btn-outline:hover { background: var(--brand-primary); color: var(--white); }

/* ── Sections ── */
.section { padding: 72px 0; }
.section-light { padding: 72px 0; background: var(--brand-light); }
.section-dark { padding: 72px 0; background: var(--brand-dark); color: var(--white); }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-header h2 { font-size: 1.9rem; font-weight: 800; margin-bottom: 12px; }
.section-header p { color: var(--text-light); font-size: 1.05rem; }
.section-dark .section-header p { color: #94a3b8; }
.brand-banner { background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark)); color: var(--white); padding: 48px 0; }

/* ── Grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ── Cards ── */
.card { background: var(--white); padding: 28px; border-radius: var(--radius); box-shadow: var(--shadow); transition: box-shadow var(--transition), transform var(--transition); }
.card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: .92rem; }
.card-dark { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); color: var(--white); }
.card-dark:hover { background: rgba(255,255,255,.1); transform: translateY(-2px); }
.card-dark p { color: #94a3b8; }
.card-icon { font-size: 1.6rem; margin-bottom: 12px; }

/* ── Stats ── */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-item h3 { font-size: 2.2rem; font-weight: 800; margin-bottom: 4px; }
.stat-item p { font-size: .9rem; opacity: .8; }

/* ── Feature Blocks ── */
.feature-block { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-bottom: 64px; }
.feature-block:nth-child(even) .feature-content { order: 2; }
.feature-block:nth-child(even) .feature-media { order: 1; }
.feature-block:last-child { margin-bottom: 0; }
.feature-content h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; }
.feature-content p { margin-bottom: 14px; color: var(--text-light); }
.feature-media img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }

/* ── Trust Logos ── */
.trust-logos { display: flex; align-items: center; justify-content: center; gap: 40px; flex-wrap: wrap; opacity: .7; }
.trust-logos img { height: 42px; width: auto; filter: grayscale(40%); transition: filter var(--transition); }
.trust-logos img:hover { filter: grayscale(0); }

/* ── Testimonials ── */
.testimonial-card { background: var(--white); padding: 28px; border-radius: var(--radius); box-shadow: var(--shadow); }
.testimonial-card p { font-style: italic; margin-bottom: 16px; color: var(--text); font-size: .95rem; }
.testimonial-author strong { display: block; font-size: .9rem; }
.testimonial-author span { font-size: .8rem; color: var(--text-light); }

/* ── AI Chunk ── */
.ai-chunk { background: var(--white); border-left: 4px solid var(--brand-accent); padding: 24px 28px; border-radius: 0 var(--radius) var(--radius) 0; box-shadow: var(--shadow); margin: 32px 0; }
.ai-chunk h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--brand-primary); }
.ai-chunk p { color: var(--text-light); font-size: .95rem; }

/* ── Data Table ── */
.data-table { width: 100%; border-collapse: collapse; margin: 28px 0; font-size: .92rem; }
.data-table th { background: var(--brand-primary); color: var(--white); padding: 12px 16px; text-align: left; font-weight: 600; font-size: .85rem; text-transform: uppercase; letter-spacing: .03em; }
.data-table td { padding: 12px 16px; border-bottom: 1px solid #e2e8f0; }
.data-table tr:nth-child(even) td { background: var(--brand-light); }
.data-table tr:hover td { background: #e8eef4; }

/* ── Comparison Table ── */
.comparison-table { width: 100%; border-collapse: collapse; margin: 28px 0; }
.comparison-table th { background: var(--brand-primary); color: var(--white); padding: 14px 16px; font-weight: 600; }
.comparison-table td { padding: 12px 16px; border-bottom: 1px solid #e2e8f0; text-align: center; }
.comparison-table tr:nth-child(even) td { background: var(--brand-light); }

/* ── Accordion / FAQ ── */
.accordion-item { border: 1px solid #e2e8f0; border-radius: var(--radius); margin-bottom: 8px; overflow: hidden; }
.accordion-item summary { padding: 16px 20px; font-weight: 600; font-size: .95rem; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; transition: background var(--transition); }
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::after { content: '+'; font-size: 1.3rem; color: var(--text-light); transition: transform var(--transition); }
.accordion-item[open] summary::after { content: '−'; }
.accordion-item[open] summary { background: var(--brand-light); }
.accordion-body { padding: 0 20px 16px; }
.accordion-body p { color: var(--text-light); font-size: .93rem; }

/* ── CTA ── */
.cta-block { background: linear-gradient(135deg, var(--brand-primary), var(--brand-dark)); color: var(--white); padding: 56px 48px; border-radius: var(--radius); text-align: center; }
.cta-block h2 { font-size: 1.8rem; margin-bottom: 16px; }
.cta-block p { opacity: .9; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* ── HowTo Steps ── */
.howto-steps { counter-reset: step; list-style: none; max-width: 680px; margin: 32px auto; }
.howto-steps li { counter-increment: step; padding: 16px 16px 16px 64px; position: relative; margin-bottom: 12px; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
.howto-steps li::before { content: counter(step); position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 32px; height: 32px; background: var(--brand-primary); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .85rem; }

/* ── Breadcrumb ── */
.breadcrumb { list-style: none; display: flex; gap: 8px; padding: 80px 24px 0; max-width: var(--max-w); margin: 0 auto; font-size: .85rem; }
.breadcrumb li::after { content: '/'; margin-left: 8px; color: var(--text-light); }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb li:last-child { color: var(--text-light); }

/* ── Related Grid ── */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 32px; }
.related-grid a { display: block; padding: 20px; background: var(--brand-light); border-radius: var(--radius); text-align: center; font-weight: 600; font-size: .9rem; color: var(--brand-primary); transition: all var(--transition); }
.related-grid a:hover { background: var(--brand-primary); color: var(--white); }

/* ── Footer ── */
.site-footer { background: var(--brand-dark); color: #cbd5e1; padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { font-size: .88rem; margin-top: 12px; line-height: 1.6; color: #94a3b8; }
.site-footer h4 { color: var(--white); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 14px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer li a { color: #94a3b8; font-size: .88rem; }
.site-footer li a:hover { color: var(--brand-accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: .82rem; color: #64748b; }
.footer-badges { display: flex; gap: 12px; }
.footer-badge { background: rgba(255,255,255,.06); padding: 4px 12px; border-radius: 6px; font-size: .75rem; color: #94a3b8; }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav, .header-cta { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 100px 0 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 1.8rem; }
  .feature-block { grid-template-columns: 1fr; }
  .feature-block:nth-child(even) .feature-content { order: 1; }
  .feature-block:nth-child(even) .feature-media { order: 2; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-item h3 { font-size: 1.6rem; }
  .mega-menu { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-block { padding: 40px 24px; }
}
@media (max-width: 480px) {
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

/* ── Performance ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
.section, .feature-block, .card { content-visibility: auto; }
:focus-visible { outline: 2px solid var(--brand-accent); outline-offset: 2px; }
@media print {
  .site-header, .mobile-nav, .site-footer, .hero-buttons, .cta-block { display: none; }
  body { color: #000; background: #fff; }
}