:root {
  --bg: #f5f7ef;
  --ink: #16211f;
  --muted: #4a5c59;
  --panel: #fefcf8;
  --line: #d8ddd0;
  --accent: #b43f2f;
  --accent-ink: #fff4ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 0%, #eceac8 0%, var(--bg) 40%, #edf0e4 100%);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

.shell {
  width: min(960px, 94vw);
  margin: 2.5rem auto 4rem;
  display: grid;
  gap: 1rem;
}

.hero {
  padding: 1.2rem 0;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0.4rem 0;
  font-size: clamp(1.75rem, 4vw, 2.7rem);
  line-height: 1.1;
}

.subhead {
  margin: 0;
  color: var(--muted);
  max-width: 58ch;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.hint {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-weight: 600;
}

textarea,
input,
select,
button {
  font: inherit;
}

textarea,
input,
select {
  width: 100%;
  border: 1px solid #c5ccbd;
  border-radius: 8px;
  padding: 0.64rem 0.72rem;
  background: #ffffff;
  color: var(--ink);
}

.fields {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

button {
  margin-top: 0.95rem;
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1.05rem;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.result h2,
.muted h2 {
  margin-top: 0;
}

.summary {
  display: grid;
  gap: 0.35rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.95rem;
}

pre {
  overflow-x: auto;
  border: 1px solid #d5dacc;
  border-radius: 8px;
  padding: 0.7rem;
  background: #f8faf4;
}

.checkout {
  background: #1a3f36;
}

.muted ul {
  margin-bottom: 0;
}