:root {
  --bg: #0b1220;
  --bg-alt: #101a2d;
  --surface: #16233a;
  --surface-2: #1c2c47;
  --text: #e6edf7;
  --muted: #aebad0;
  --primary: #31c3e7;
  --primary-dark: #143d74;
  --border: #2b3a57;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  --radius: 18px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, #0d1628 100%);
  color: var(--text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.hero {
  padding: 4.5rem 0 3rem;
  border-bottom: 1px solid var(--border);
}

.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.badge {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(49, 195, 231, 0.14);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
}

h1,
h2,
h3 {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.3rem, 5vw, 4rem);
  line-height: 1.05;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 60ch;
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.2rem;
  border-radius: 12px;
  font-weight: 700;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

.btn-primary {
  background: var(--primary);
  color: #07111f;
}

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

.hero-logo {
  background: #ffffff;
  border-radius: 22px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.grid {
  display: grid;
  gap: 1rem;
}

.cards-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.step {
  display: inline-block;
  margin-bottom: 0.8rem;
  color: var(--primary);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.feature-list {
  margin: 0;
  padding-left: 1.1rem;
}

.feature-list li + li {
  margin-top: 0.45rem;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.link-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  font-weight: 700;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.link-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 0 2.4rem;
}

.footer-content {
  color: var(--muted);
  text-align: center;
}

@media (max-width: 920px) {
  .hero-content,
  .cards-2,
  .cards-3,
  .cards-4,
  .links-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }
}