:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #1f2933;
  --radius: 10px;
  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.7);
  --max-width: 960px;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #0b1120, #020617 55%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.95), rgba(2, 6, 23, 0.7));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 14px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.nav-links a {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
}

main {
  flex: 1;
  padding: 32px 16px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero {
  width: 100%;
  max-width: var(--max-width);
  padding: 32px 24px;
  margin-bottom: 32px;
  border-radius: 18px;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.15), #020617 55%);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.hero-content h1 {
  font-size: 32px;
  line-height: 1.2;
  margin-bottom: 12px;
}

.hero-content p {
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
}

.primary-btn {
  background: var(--accent);
  color: #020617;
  font-weight: 600;
}

.primary-btn:hover {
  background: #0ea5e9;
  transform: translateY(-1px);
}

.secondary-btn {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.4);
}

.secondary-btn:hover {
  background: rgba(15, 23, 42, 1);
  border-color: var(--accent);
}

.section {
  width: 100%;
  max-width: var(--max-width);
  padding: 24px 24px;
  margin-bottom: 20px;
  border-radius: var(--radius);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(30, 64, 175, 0.5);
}

.section h2 {
  font-size: 20px;
  margin-bottom: 10px;
}

.section p {
  color: var(--muted);
  margin-bottom: 10px;
}

.steps {
  list-style: decimal;
  padding-left: 20px;
  color: var(--text);
}

.steps li {
  margin-bottom: 6px;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  margin-bottom: 6px;
  color: var(--muted);
}

.feature-list strong {
  color: var(--text);
}

.site-footer {
  padding: 16px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid rgba(15, 23, 42, 0.9);
  background: #020617;
}

@media (max-width: 640px) {
  .hero-content h1 {
    font-size: 24px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 24px 18px;
  }

  .section {
    padding: 18px 16px;
  }
}