:root {
  color-scheme: light;
  --bg: #f7f6f1;
  --card: rgba(255, 255, 255, 0.86);
  --text: #101828;
  --muted: #667085;
  --accent: #2563eb;
  --border: rgba(16, 24, 40, 0.08);
  --shadow: 0 18px 48px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.12), transparent 28%),
    radial-gradient(circle at left center, rgba(15, 118, 110, 0.10), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  width: min(100%, 480px);
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 22px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .12em;
}
h1, h2 { margin: 0 0 12px; }
h1 {
  font-size: 30px;
  line-height: 1.08;
  letter-spacing: -0.04em;
}
.subtitle, .hint, .trust p {
  color: var(--muted);
  line-height: 1.5;
}
.price {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-top: 16px;
}
.section {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.features {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}
.status-box {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 14px;
  white-space: pre-wrap;
}
.actions {
  margin-top: 24px;
}
.primary {
  width: 100%;
  border: 0;
  border-radius: 18px;
  padding: 16px 20px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: white;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 16px 24px rgba(37, 99, 235, 0.25);
}
.primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
#payment-form { min-height: 240px; }