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

:root {
  --bg: #0f1729;
  --bg-card: #121e30;
  --surface: #1a2744;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --accent-border: rgba(0, 212, 255, 0.4);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 41, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--text);
}

.nav-cta {
  color: var(--accent) !important;
}

.nav-cta:hover {
  color: var(--accent) !important;
  text-decoration: underline;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

.hero {
  text-align: center;
  padding: 2rem 0 3rem;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 1.75rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.hero-featured {
  margin: 2.5rem auto 0;
  max-width: 100%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.hero-featured img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  transition: background, border-color, box-shadow 0.2s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.btn-primary:hover {
  background: rgba(0, 212, 255, 0.25);
  border-color: rgba(0, 212, 255, 0.6);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.2);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
}

.btn-secondary:hover {
  border-color: var(--text);
  color: var(--text);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.value-prop {
  margin-bottom: 3rem;
}

.value-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.value-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.5rem;
}

.value-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.value-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.steps {
  margin-bottom: 3rem;
}

.steps-list {
  list-style: none;
  counter-reset: step;
}

.steps-list li {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  counter-increment: step;
}

.step-num {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps-list strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.steps-list p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.platforms {
  margin-bottom: 3rem;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
}

.platform-list li {
  background: var(--surface);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.cta-section {
  text-align: center;
  padding: 2.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
}

.cta-subtitle {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.5rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.footer a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer a:hover {
  color: var(--accent);
}

@media (max-width: 640px) {
  .nav {
    gap: 1rem;
  }

  .nav a:not(.nav-cta) {
    display: none;
  }

  main {
    padding: 2rem 1rem 3rem;
  }
}