:root {
  --bg: #faf8f4;
  --fg: #23211d;
  --muted: #6d6a63;
  --line: #e4e0d7;
  --card: #ffffff;
  --accent: #2f6f5e;
  --accent-fg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171715;
    --fg: #ecebe6;
    --muted: #a3a097;
    --line: #2e2d29;
    --card: #1f1e1b;
    --accent: #5fb39b;
    --accent-fg: #0d1f1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
.top {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 760px; margin: 0 auto; padding: 20px 16px;
}
.logo { font-weight: 600; text-decoration: none; color: var(--fg); display: flex; align-items: center; gap: 8px; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); display: inline-block; }
nav { display: flex; gap: 16px; }
nav a { text-decoration: none; color: var(--muted); }
nav a[aria-current] { color: var(--fg); }
.wrap { max-width: 760px; margin: 0 auto; padding: 8px 16px 48px; }
h1 { font-size: 32px; line-height: 1.2; margin: 16px 0 8px; }
h2 { font-size: 18px; margin: 32px 0 8px; }
.lead { color: var(--muted); margin: 0 0 24px; }
.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px;
}
.row { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: end; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
label.check { flex-direction: row; align-items: center; gap: 8px; padding-bottom: 8px; }
select, input[type=number] {
  font: inherit; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px; min-width: 110px;
}
.actions { display: flex; gap: 10px; margin-top: 16px; }
button {
  font: inherit; border: 1px solid var(--line); background: var(--bg); color: var(--fg);
  border-radius: 8px; padding: 8px 16px; cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.result {
  display: block; margin: 20px 0; padding: 20px; min-height: 72px;
  font-size: 22px; white-space: pre-wrap; word-break: break-word;
  border: 1px dashed var(--line); border-radius: 12px;
}
.history ol { padding-left: 20px; color: var(--muted); }
.history li { margin: 4px 0; }
.prose p, .prose li { max-width: 62ch; }
code { background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }
.foot { max-width: 760px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }