:root {
  color-scheme: light dark;
  --bg: #f6f7f8;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #566273;
  --line: #d6dbe1;
  --accent: #0b5c6b;
  --accent-soft: #e4f1f3;
  --warn-bg: #fdf4e3;
  --warn-line: #d9a441;
  --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161b;
    --surface: #1b2128;
    --text: #e8ecf0;
    --muted: #a3aebb;
    --line: #333c47;
    --accent: #5cc3d4;
    --accent-soft: #1b3238;
    --warn-bg: #33291a;
    --warn-line: #b98a35;
    --error: #ff8a80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

header.site { background: var(--surface); border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; flex-wrap: wrap; gap: 4px 24px; align-items: baseline; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; }
header.site .name { font-weight: 700; color: var(--text); text-decoration: none; }
header.site nav a { margin-left: 16px; }
header.site nav a:first-child { margin-left: 0; }

main { padding: 24px 0 40px; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; line-height: 1.3; margin: 32px 0 8px; }
h3 { font-size: 1rem; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.lead { color: var(--muted); font-size: 1.0625rem; }
.judgment { font-weight: 600; }

.notice { background: var(--warn-bg); border-left: 4px solid var(--warn-line); padding: 12px 16px; margin: 16px 0; border-radius: 4px; }
.notice h2, .notice h3 { margin: 0 0 6px; font-size: 1rem; }
.notice ol { margin: 0 0 8px; padding-left: 20px; }
.notice p:last-child { margin-bottom: 0; }

.calc-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; margin-top: 16px; }

.fields { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 8px 20px; }
.field { border: 0; border-bottom: 1px solid var(--line); margin: 0; padding: 14px 0; min-width: 0; }
.field:last-child { border-bottom: 0; }
.field-label { display: block; font-weight: 600; padding: 0; }
.hint { display: block; color: var(--muted); font-size: 0.9rem; }
.note { display: block; color: var(--muted); font-size: 0.8125rem; margin-top: 6px; }

.field input[type="text"], .field select {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-top: 6px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
.field input[type="text"] { max-width: 160px; }
.field input[type="text"]:focus, .field select:focus, .opt input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.opts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 6px; }
.opt { display: inline-flex; gap: 8px; align-items: baseline; }

.field-error { display: block; color: var(--error); font-size: 0.9rem; margin-top: 4px; }
.has-error input[type="text"] { border-color: var(--error); }

.result { position: sticky; top: 16px; background: var(--accent-soft); border: 1px solid var(--accent); border-radius: 8px; padding: 16px 20px; }
.result h3 { margin-bottom: 8px; }
.result dl { margin: 0; }
.result dt { font-size: 0.9rem; }
.result dd { margin: 0 0 12px; font-size: 2.25rem; line-height: 1.15; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.result .text-value dd { font-size: 1.25rem; }
.result .side-note { font-size: 0.8125rem; color: var(--muted); margin: 12px 0 0; }
.result button { font: inherit; font-size: 0.9rem; padding: 6px 12px; border: 1px solid var(--accent); border-radius: 6px; background: transparent; color: var(--accent); cursor: pointer; }

.info { margin-top: 8px; }
.info ul { margin: 0 0 12px; padding-left: 20px; }
.citation { margin-bottom: 12px; }

table.simple { border-collapse: collapse; margin: 8px 0 16px; }
table.simple th, table.simple td { border: 1px solid var(--line); padding: 4px 12px; text-align: left; font-variant-numeric: tabular-nums; }

ul.calc-list { list-style: none; margin: 16px 0 24px; padding: 0; display: grid; gap: 12px; }
ul.calc-list li { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; }
ul.calc-list a { font-weight: 600; }
ul.calc-list span { display: block; color: var(--muted); font-size: 0.9rem; }

footer.site { border-top: 1px solid var(--line); background: var(--surface); padding: 20px 0 28px; font-size: 0.875rem; color: var(--muted); }
footer.site p:last-child { margin-bottom: 0; }

@media (max-width: 860px) {
  h1 { font-size: 1.5rem; }
  .calc-grid { display: block; }
  .fields { padding: 4px 14px; }
  .result { top: auto; bottom: 0; margin-top: 12px; padding: 10px 14px; z-index: 2; box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.15); }
  .result h3, .result .side-note { display: none; }
  .result dl { display: flex; gap: 12px; margin-bottom: 6px; }
  .result dl > div { flex: 1; min-width: 0; }
  .result dl[hidden] { display: none; }
  .result dt { font-size: 0.8125rem; line-height: 1.25; }
  .result dd { font-size: 1.5rem; margin: 2px 0 0; }
  .result .text-value dd { font-size: 0.9375rem; line-height: 1.2; margin-top: 4px; }
  .result dl > [data-output="points"] { flex: 0 0 3.25rem; }
  .result button { padding: 3px 10px; font-size: 0.8125rem; }
}