:root {
  --bg: #fbfaf7; --fg: #1c2321; --muted: #5d6965; --line: #e3e0d8; --card: #ffffff;
  --brand: #1f6f5c; --brand-soft: #e6f2ee; --warn: #9a3b12; --warn-soft: #fdf0e8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121614; --fg: #e8ece9; --muted: #9aa6a1; --line: #2a312e; --card: #1a201d;
    --brand: #5cc3a6; --brand-soft: #18302a; --warn: #f0a37c; --warn-soft: #36211a; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); line-height: 1.65;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; word-break: keep-all; }
a { color: var(--brand); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.top { border-bottom: 1px solid var(--line); background: var(--card); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.logo { font-weight: 800; font-size: 20px; color: var(--fg); text-decoration: none; letter-spacing: -0.02em; }
.top nav a { color: var(--fg); text-decoration: none; font-size: 15px; }
main { padding: 28px 16px 48px; }
h1 { font-size: 28px; line-height: 1.3; letter-spacing: -0.02em; margin: 4px 0 12px; }
h2 { font-size: 19px; margin: 32px 0 10px; }
.lead { font-size: 17px; color: var(--muted); }
.eyebrow { font-size: 13px; color: var(--brand); font-weight: 600; margin: 0; }
.muted { color: var(--muted); font-size: 14px; }
.calc { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 20px 0 0; }
.field { min-width: 0; display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); }
.field input, .field select { font-size: 18px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--fg); width: 100%; }
.check { grid-column: 1 / -1; font-size: 15px; display: flex; gap: 8px; align-items: center; }
.check input { width: 20px; height: 20px; }
.result { background: var(--brand-soft); border-radius: 14px; padding: 18px; margin-top: 12px; }
.result .big { font-size: 32px; font-weight: 800; margin: 0 0 4px; color: var(--brand); letter-spacing: -0.02em; }
.rows { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 10px 0 0; }
.rows dt { color: var(--muted); } .rows dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.warn { background: var(--warn-soft); color: var(--warn); border-radius: 8px; padding: 8px 12px; font-size: 14px; }
.note { font-size: 14px; color: var(--muted); }
.formula { background: var(--card); border: 1px dashed var(--line); border-radius: 10px; padding: 12px; font-weight: 600; }
.cta { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 18px 10px; margin-top: 32px; }
.sources { border-top: 1px solid var(--line); margin-top: 32px; font-size: 14px; }
.sources h2 { font-size: 15px; }
.hero h1 { font-size: 32px; }
.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: 12px; margin: 24px 0; }
.door { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 4px 18px 16px; }
.cards { list-style: none; padding: 0; display: grid; gap: 10px; }
.cards a { display: block; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; text-decoration: none; color: var(--fg); }
.cards span { display: block; color: var(--muted); font-size: 14px; margin-top: 2px; }
.foot { border-top: 1px solid var(--line); padding: 20px 0 40px; font-size: 14px; }
.btn { font: inherit; font-size: 16px; font-weight: 600; border: 0; border-radius: 10px; padding: 11px 16px;
  background: var(--brand); color: #fff; cursor: pointer; }
@media (prefers-color-scheme: dark) { .btn { color: #0d1f1a; } }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); margin-top: 8px; }
.helper { margin-top: 16px; }
.helper summary { cursor: pointer; color: var(--brand); font-weight: 600; }
.rowsedit { display: grid; gap: 8px; }
.erow { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 8em) 36px; gap: 6px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px; }
.erow input:not([type=checkbox]) { font: inherit; font-size: 16px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--fg); min-width: 0; width: 100%; }
.erow .wide, .erow .mini { grid-column: 1 / 3; }
.erow .x { grid-column: 3; grid-row: 1; background: none; border: 0; font-size: 22px; color: var(--muted); cursor: pointer; }
.mini { font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: center; }
.ok { color: var(--brand); font-weight: 600; }
.result .warn ul { margin: 4px 0 0; padding-left: 20px; }
.result .btn { margin-top: 12px; }
.slip-print { background: #fff; color: #111; border: 1px solid var(--line); border-radius: 12px; padding: 16px; margin-top: 16px; font-size: 14px; }
.slip-print h2 { margin: 0 0 12px; text-align: center; font-size: 20px; }
.slip-print table { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.slip-print th, .slip-print td { border: 1px solid #ccc; padding: 6px 8px; text-align: left; vertical-align: top; }
.slip-print th { background: #f3f3f0; }
.slip-print .meta td:nth-child(odd) { background: #f8f8f5; width: 22%; white-space: nowrap; }
.slip-print .sum td { font-weight: 700; }
.slip-print .netline { text-align: right; font-size: 17px; margin: 0; }
.checklist ul { list-style: none; padding: 0; display: grid; gap: 8px; }
.check-item { display: flex; gap: 12px; align-items: flex-start; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px; cursor: pointer; }
.check-item input { width: 22px; height: 22px; flex: none; margin-top: 2px; }
.check-item small { display: block; color: var(--muted); margin-top: 4px; }
.check-item input:checked + span strong { color: var(--brand); }
.progress { position: sticky; top: 0; background: var(--bg); padding: 8px 0; font-weight: 700; color: var(--brand); margin: 16px 0 0; z-index: 1; }
.post .byline { margin-top: -4px; }
.prose { font-size: 17px; }
.prose h2 { font-size: 20px; }
.prose table { width: 100%; border-collapse: collapse; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.draft-banner { background: var(--warn-soft); color: var(--warn); border-radius: 8px; padding: 10px 12px; font-weight: 600; }
@media print {
  body { background: #fff; }
  body > header, body > footer, main > article > *:not(.slip-print) { display: none !important; }
  main { padding: 0; }
  .slip-print { display: block !important; border: 0; padding: 0; margin: 0; }
}