:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --border: #d8d8d8;
  --accent: #2b5aa3;
  --card-bg: #f7f7f7;
  --error: #a3312b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8e8e8;
    --muted: #a0a0a0;
    --border: #3a3d42;
    --accent: #7aa7e6;
    --card-bg: #1e2126;
    --error: #e08a85;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0 16px 48px 16px;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}
.wrap { max-width: 760px; margin: 0 auto; }
h1 { font-size: 1.6rem; margin-top: 1.4em; }
h2 { font-size: 1.25rem; margin-top: 1.6em; border-bottom: 1px solid var(--border); padding-bottom: 0.3em; }
a { color: var(--accent); }
.review-line {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8em 1em;
  font-size: 0.95rem;
  margin: 1em 0;
}
.purpose { color: var(--muted); }
.category-block { margin: 1.2em 0; }
.card-list { list-style: none; padding: 0; margin: 0.5em 0; }
.card-list li { padding: 0.5em 0; border-bottom: 1px solid var(--border); }
.card-list a { font-weight: 600; text-decoration: none; }
.card-list a:hover { text-decoration: underline; }
.card-desc { color: var(--muted); font-size: 0.92rem; }
footer { margin-top: 3em; padding-top: 1em; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.field { margin: 0.9em 0; }
.field label { display: block; font-weight: 600; margin-bottom: 0.2em; }
.field input, .field select, .field textarea {
  width: 100%;
  max-width: 420px;
  padding: 0.4em 0.5em;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
}
.field-desc { color: var(--muted); font-size: 0.85rem; margin-top: 0.2em; }
#run-button {
  padding: 0.6em 1.4em;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  margin-top: 0.6em;
}
#run-button:hover { opacity: 0.9; }
#answer-area {
  margin-top: 1em;
  font-size: 1.3rem;
  font-weight: 700;
  min-height: 1.6em;
}
#answer-area.error { color: var(--error); font-size: 1rem; font-weight: 600; }
#receipt-area {
  white-space: pre-wrap;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.8em 1em;
  margin-top: 0.8em;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.88rem;
  min-height: 1em;
}
table { border-collapse: collapse; width: 100%; margin: 0.8em 0; }
table th, table td { border: 1px solid var(--border); padding: 0.4em 0.6em; text-align: left; font-size: 0.9rem; }
table th { background: var(--card-bg); }
.disclaimer {
  background: var(--card-bg);
  border-left: 4px solid var(--error);
  padding: 0.7em 1em;
  margin: 1em 0;
  font-size: 0.9rem;
}
.download-links { margin: 0.8em 0; }
.download-links a { margin-right: 1em; }
ol.steps li, ul.plain li { margin: 0.3em 0; }