:root {
  --ink: #12141a;
  --muted: #5c6478;
  --line: #d8dde8;
  --bg: #f6f7fa;
  --accent: #0b5fff;
  --ok: #0a7a3e;
  --warn: #8a5a00;
  --err: #8a1f11;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #dce7ff 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #e8fff3 0%, transparent 50%),
    var(--bg);
  line-height: 1.5;
  min-height: 100vh;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
}
main.wide { max-width: 56rem; }
h1 {
  font-family: "IBM Plex Serif", Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}
.brand { font-family: "IBM Plex Serif", Georgia, serif; }
.lede { color: var(--muted); margin: 0 0 1.75rem; }
label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
}
input, select, textarea, button {
  font: inherit;
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
textarea { min-height: 5rem; resize: vertical; }
.field { margin-bottom: 1rem; }
.row { display: grid; gap: 1rem; }
@media (min-width: 640px) {
  .row.two { grid-template-columns: 1fr 1fr; }
}
button, .btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  text-align: center;
  text-decoration: none;
}
button.secondary, .btn.secondary {
  background: #fff;
  color: var(--accent);
  border-color: var(--line);
}
button:disabled { opacity: 0.55; cursor: not-allowed; }
.note { margin-top: 1.25rem; font-size: 0.9rem; color: var(--muted); }
.banner {
  padding: 0.75rem 0.9rem;
  border-radius: 6px;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}
.banner.ok { background: #e7f7ee; color: var(--ok); }
.banner.warn { background: #fff6e0; color: var(--warn); }
.banner.err { background: #fdecea; color: var(--err); }
.sku-list { list-style: none; padding: 0; margin: 0 0 2rem; }
.sku-list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.sku-list h2 {
  font-size: 1.15rem;
  margin: 0 0 0.25rem;
}
.sku-meta { color: var(--muted); font-size: 0.95rem; margin: 0 0 0.75rem; }
.price { font-weight: 600; margin: 0 0 0.5rem; }
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.steps span[aria-current="step"] { color: var(--ink); font-weight: 600; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
th, td { text-align: left; padding: 0.55rem 0.35rem; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
th { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.term-options label.choice {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-weight: 400;
  cursor: pointer;
}
.term-options input { width: auto; margin-top: 0.25rem; }
code { font-size: 0.9em; }
[hidden] { display: none !important; }