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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: radial-gradient(circle at top, rgba(34, 197, 94, 0.2), transparent 45%),
    linear-gradient(140deg, #22c55e 0%, #0f172a 100%);
  min-height: 100vh;
  padding: 2rem;
  color: #0f172a;
}

.app {
  max-width: 1000px;
  margin: 0 auto;
  background: #f8fafc;
  border-radius: 1.25rem;
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.35);
  overflow: hidden;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.header {
  background: #ffffff;
  border-radius: 1rem;
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  border: 1px solid #e2e8f0;
}

.eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  margin-bottom: 0.5rem;
}

.header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.4rem;
}

.header p {
  color: #475569;
  font-size: 1rem;
}

.badge {
  background: #dcfce7;
  color: #166534;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #ffffff;
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid #e2e8f0;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

.card.accent {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), rgba(15, 23, 42, 0.08));
  border-color: rgba(34, 197, 94, 0.35);
}

.card.muted {
  background: #ecfdf3;
}

.card h2 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.card p {
  color: #475569;
  line-height: 1.6;
}

.steps {
  display: grid;
  gap: 0.75rem;
  margin-left: 1.25rem;
  color: #1e293b;
}

.pill-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.pill {
  background: #e2e8f0;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #475569;
}

.demo-stage {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 0.9rem;
  padding: 1.25rem;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.demo-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.demo-meta {
  font-size: 0.8rem;
  color: #94a3b8;
}

.controls {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  padding: 0.7rem 1.2rem;
  border-radius: 0.75rem;
  border: none;
  background: #22c55e;
  color: white;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn.ghost {
  background: transparent;
  border: 1px solid rgba(34, 197, 94, 0.5);
  color: #166534;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(34, 197, 94, 0.3);
}

.proof {
  display: flex;
  gap: 0.75rem;
  margin: 1rem 0 0.5rem;
  flex-wrap: wrap;
}

.proof input {
  flex: 1 1 260px;
  padding: 0.75rem;
  border-radius: 0.75rem;
  border: 1px solid #cbd5f5;
  font-size: 0.95rem;
  background: #ffffff;
}

.status {
  font-size: 0.85rem;
  color: #64748b;
}

.footer {
  text-align: center;
  color: #e2e8f0;
  margin-top: 1.5rem;
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
  }
}