:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-2: #1f2937;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --success: #34d399;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #020817, #0f172a 40%, #111827);
  color: var(--text);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.hero {
  padding: 50px 0 20px;
}

.badge {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.12);
  border: 1px solid rgba(125, 211, 252, 0.35);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.4rem, 4vw, 4.2rem);
  margin: 20px 0 16px;
  line-height: 1.1;
}

.subtitle {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.card {
  background: rgba(17, 24, 39, 0.84);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 16px 40px rgba(2, 6, 23, 0.25);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.api-demo {
  margin-top: 42px;
  background: rgba(17, 24, 39, 0.72);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 20px;
  padding: 22px;
}

.api-demo h3 {
  margin-top: 0;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 12px;
}

button {
  appearance: none;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0f172a;
  font-weight: 700;
  padding: 11px 16px;
  cursor: pointer;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 12px;
  padding: 16px;
  color: #dbeafe;
  line-height: 1.7;
}

footer {
  margin-top: 38px;
  color: var(--muted);
  text-align: center;
  font-size: 0.96rem;
}