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

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --text: #1e293b;
  --text-light: #64748b;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #e2e8f0;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f1f5f9;
    --text-light: #94a3b8;
    --bg: #0f172a;
    --bg-alt: #1e293b;
    --border: #334155;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* Header */
header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}
header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--primary); }
header nav { display: flex; gap: 24px; }
header nav a { color: var(--text-light); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
header nav a:hover { color: var(--primary); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; margin-bottom: 16px; }
.hero p { font-size: 1.2rem; opacity: 0.9; margin-bottom: 32px; }
.download-btn {
  display: inline-block;
  background: white;
  color: var(--primary);
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

/* Features */
.features { padding: 80px 0; background: var(--bg-alt); }
.features h2 { text-align: center; font-size: 2rem; font-weight: 700; margin-bottom: 48px; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow 0.2s;
}
.feature:hover { box-shadow: 0 4px 20px rgba(79,70,229,0.1); }
.feature .icon { font-size: 2rem; display: block; margin-bottom: 12px; }
.feature h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.feature p { color: var(--text-light); font-size: 0.9rem; }

/* Content pages */
.page-content { max-width: 800px; margin: 60px auto; padding: 0 24px; }
.page-content h1 { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.page-content .subtitle { color: var(--text-light); margin-bottom: 40px; }
.page-content h2 { font-size: 1.3rem; font-weight: 600; margin: 32px 0 12px; }
.page-content p { color: var(--text-light); margin-bottom: 16px; }
.page-content ul { color: var(--text-light); margin: 12px 0 16px 20px; }
.page-content ul li { margin-bottom: 6px; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
.faq-item h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; color: var(--primary); }
.faq-item p { color: var(--text-light); font-size: 0.9rem; }

/* Contact */
.contact-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 32px;
  text-align: center;
}
.contact-box a { color: var(--primary); text-decoration: none; font-weight: 600; }

/* Footer */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
}
footer p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 12px; }
footer nav { display: flex; justify-content: center; gap: 24px; margin-bottom: 12px; }
footer nav a { color: var(--text-light); text-decoration: none; font-size: 0.85rem; }
footer nav a:hover { color: var(--primary); }

@media (max-width: 600px) {
  header nav { gap: 12px; }
  .hero { padding: 60px 0; }
}