:root {
  --bg-primary: #0f0a2e;
  --bg-gradient-1: #1e1b4b;
  --bg-gradient-2: #0f0a2e;
  --bg-gradient-3: #050210;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --accent: #a78bfa;
  --accent-strong: #7c3aed;
  --muted: #94a3b8;
  --card: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.08);
  --spacing: 18px;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: radial-gradient(circle at 20% 20%, var(--bg-gradient-1), var(--bg-gradient-2) 40%, var(--bg-gradient-3) 90%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, var(--bg-gradient-1), var(--bg-gradient-2) 40%, var(--bg-gradient-3) 90%);
  color: var(--text-primary);
}

a {
  color: var(--text-primary);
  text-decoration: none;
}

header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(5, 2, 16, 0.7);
  border-bottom: 1px solid var(--card-border);
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang-toggle {
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 10px;
  cursor: pointer;
}

.section {
  padding: 64px 24px;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  align-items: center;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-illustration {
  max-width: 360px;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid var(--card-border);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  object-fit: cover;
}

.diagram-illustration {
  max-width: 520px;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

.hero .tiles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  max-width: 360px;
  margin-left: auto;
}

.hero h1 {
  font-size: 44px;
  margin: 0 0 12px;
}

.hero p {
  color: var(--text-secondary);
  margin: 0 0 20px;
  font-size: 18px;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  cursor: pointer;
  font-weight: 600;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent-strong), var(--accent));
  border: none;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.tile {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 18px;
}

.subtitle {
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.section h2 {
  margin: 0 0 12px;
  font-size: 30px;
}

.list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 10px;
}

.list li {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px;
  color: var(--text-secondary);
}

.faq {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.faq details {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 14px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  outline: none;
  line-height: 1.5;
  padding: 4px 0;
}

.faq p {
  margin: 8px 0 4px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.quote {
  margin-top: 18px;
  color: var(--muted);
  font-style: italic;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  line-height: 1.5;
}

.card .step-num {
  font-weight: 700;
  color: var(--accent);
  font-size: 13px;
}

.card img {
  max-width: 140px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
}

footer {
  padding: 24px;
  border-top: 1px solid var(--card-border);
  background: rgba(5, 2, 16, 0.7);
}

.footer-grid {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.footer-grid a {
  color: var(--text-secondary);
}

.note {
  color: var(--muted);
}

@media (max-width: 700px) {
  .nav-links {
    display: none;
  }
  .hero h1 {
    font-size: 34px;
  }
}