:root {
  --color-primary: #0f172a;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-light: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1100px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-hover: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --transition: all 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--color-text); line-height: 1.6; background: var(--color-bg); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.2; color: var(--color-primary); margin-bottom: 0.75rem; }
h1 { font-size: clamp(2rem, 5vw, 2.75rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin-bottom: 1rem; color: var(--color-text-light); }

.skip-link { position: absolute; top: -40px; left: 0; background: var(--color-accent); color: white; padding: 0.5rem 1rem; z-index: 100; transition: top 0.2s; font-weight: 600; }
.skip-link:focus { top: 0; }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 4rem 0; }
.bg-light { background: var(--color-bg-light); }
.bg-dark { background: var(--color-bg-dark); color: white; }
.text-center { text-align: center; }

.site-header { background: var(--color-bg); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 50; }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; max-width: var(--max-width); margin: 0 auto; }
.logo { font-weight: 800; font-size: 1.25rem; color: var(--color-primary); letter-spacing: -0.5px; }
.nav-list { display: flex; gap: 1.5rem; align-items: center; }
.nav-list a { color: var(--color-text); font-weight: 500; }
.nav-list a:hover { color: var(--color-accent); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; padding: 0.25rem; }

.btn { display: inline-block; padding: 0.75rem 1.5rem; border-radius: var(--radius); font-weight: 600; cursor: pointer; border: none; transition: var(--transition); text-align: center; }
.btn-primary { background: var(--color-accent); color: white; }
.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(59,130,246,0.4); }
.btn-outline { background: transparent; border: 2px solid var(--color-accent); color: var(--color-accent); }
.btn-outline:hover { background: var(--color-accent); color: white; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.9rem; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.card { background: white; padding: 1.5rem; border-radius: var(--radius-lg); box-shadow: var(--shadow); border: 1px solid var(--color-border); transition: var(--transition); }
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.card h3 { margin-bottom: 0.5rem; }
.card p { font-size: 0.95rem; margin-bottom: 1rem; }
.card-meta { font-size: 0.85rem; color: var(--color-text-light); margin-bottom: 0.75rem; }
.tag { display: inline-block; background: #e0f2fe; color: #0369a1; padding: 0.25rem 0.5rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600; margin-right: 0.5rem; margin-bottom: 0.5rem; }

.process-flow { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-bottom: 2rem; }
.step { background: var(--color-primary); color: white; padding: 0.75rem 1.25rem; border-radius: 20px; font-weight: 600; }
.arrow { font-size: 1.5rem; color: var(--color-text-light); }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.75rem; border: 1px solid var(--color-border); border-radius: var(--radius); font-family: inherit; font-size: 1rem; }
.form-group textarea { resize: vertical; min-height: 120px; }
.newsletter-form { display: flex; gap: 0.5rem; max-width: 500px; margin: 1.5rem auto 0; flex-wrap: wrap; justify-content: center; }
.newsletter-form input { flex: 1; min-width: 200px; }

.site-footer { background: #020617; color: #94a3b8; padding: 3rem 0 1.5rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.footer-links li { margin-bottom: 0.5rem; }
.copyright { text-align: center; font-size: 0.875rem; border-top: 1px solid #1e293b; padding-top: 1.5rem; }

.fade-in { opacity: 0; transform: translateY(15px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
  .nav-list { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: white; padding: 1rem; border-bottom: 1px solid var(--color-border); box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
  .nav-list.active { display: flex; }
  .nav-toggle { display: block; }
  .process-flow { flex-direction: column; align-items: center; }
  .arrow { transform: rotate(90deg); margin: 0.5rem 0; }
  .hero { padding: 3rem 0; }
}