:root {
  --ink: #14201c;
  --muted: #5c6b64;
  --bg: #f4f6f5;
  --card: #ffffff;
  --accent: #1f6f5b;
  --ok: #2f9e6b;
  --bad: #c0392b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #d7ebe3 0%, transparent 55%),
    linear-gradient(180deg, #eef3f1 0%, var(--bg) 40%, #e8eeeb 100%);
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 72px 24px 48px;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-weight: 700;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.lede {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.5;
}

.card {
  background: var(--card);
  border-radius: 18px;
  padding: 20px 22px;
  box-shadow: 0 16px 40px rgba(20, 32, 28, 0.08);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-family: ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

#api-line {
  margin: 0;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 1.05rem;
}

#api-line.ok {
  color: var(--ok);
}

#api-line.bad {
  color: var(--bad);
}

.hint {
  margin-top: 28px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}