/* 퇴근각: 흰 바탕 + 짙은 남색 글자 + 파란 포인트 하나. 장식 없음. 모바일 우선, 외부 요청은 글꼴 하나(jsdelivr). */
:root {
  --bg: #ffffff;
  --surface: #f5f6f8;
  --line: #e3e6ec;
  --fg: #0f1b33;
  --muted: #566176;
  --accent: #1c4fd6;
  --on-accent: #ffffff;
  --radius: 16px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1220;
    --surface: #151c2f;
    --line: #28324d;
    --fg: #eef1f7;
    --muted: #9ba6bc;
    --accent: #8fb0ff;
    --on-accent: #0d1220;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  font-size: 16px; line-height: 1.7; word-break: keep-all; overflow-wrap: break-word;
  font-variant-numeric: tabular-nums;
}
a { color: var(--accent); }
h1, h2, h3 { color: var(--fg); line-height: 1.35; letter-spacing: -0.01em; }

/* 헤더 */
header.site { border-bottom: 1px solid var(--line); background: var(--bg); position: sticky; top: 0; z-index: 5; }
header.site .bar { max-width: 720px; margin: 0 auto; padding: 0 20px; height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
header.site .logo { color: var(--fg); text-decoration: none; font-weight: 800; font-size: 1.15rem; letter-spacing: -0.02em; display: inline-flex; align-items: center; gap: 8px; }
header.site .logo .mark { color: var(--accent); flex: none; }
header.site nav { display: flex; gap: 18px; }
header.site nav a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; padding: 8px 0; }
header.site nav a:hover { color: var(--fg); }

/* 본문 */
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 24px; }
h1 { font-size: 1.75rem; font-weight: 800; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 28px; font-size: 1rem; }
h2 { font-size: 1.2rem; font-weight: 700; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 20px; margin-bottom: 20px; }
.card h2 { margin: 0 0 12px; }
.card h2 ~ h2 { margin-top: 22px; }

/* 입력 */
label { display: block; font-weight: 600; margin: 18px 0 8px; font-size: .95rem; }
form label:first-child, .row label { margin-top: 0; }
.row + label, .row + .check { margin-top: 18px; }
.hint { font-weight: 400; color: var(--muted); font-size: .85rem; }
input, select {
  width: 100%; height: 52px; font: inherit; font-size: 1.125rem; font-weight: 500; color: var(--fg);
  padding: 0 14px; background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  font-variant-numeric: tabular-nums; appearance: none; -webkit-appearance: none;
}
select { background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 20px) 22px, calc(100% - 15px) 22px; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
input::placeholder { color: var(--muted); opacity: .7; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.field { position: relative; }
.field input { padding-right: 62px; }
.field .suffix { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: .95rem; pointer-events: none; }
.row { display: flex; gap: 12px; }
.row > div { flex: 1; min-width: 0; }
.check { display: flex; align-items: center; gap: 10px; font-weight: 400; margin: 18px 0 0; }
.check input { width: 22px; height: 22px; flex: none; appearance: auto; -webkit-appearance: checkbox; accent-color: var(--accent); }
button.primary {
  width: 100%; height: 54px; margin-top: 24px; font: inherit; font-size: 1.05rem; font-weight: 700;
  color: var(--on-accent); background: var(--accent); border: 0; border-radius: 12px; cursor: pointer;
}
button.primary:hover { filter: brightness(1.06); }
button.primary:focus-visible { outline: 3px solid var(--fg); outline-offset: 2px; }

/* 결과 */
.result { background: var(--surface); border-color: var(--line); }
.result > div:first-child { color: var(--muted); font-size: .95rem; font-weight: 500; }
.result .big { font-size: clamp(2rem, 9vw, 2.6rem); font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; color: var(--accent); margin: 6px 0 4px; font-variant-numeric: tabular-nums; }
.result details.detail { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 4px; }
.result details.detail summary { cursor: pointer; font-weight: 600; font-size: .95rem; padding: 12px 0; color: var(--fg); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.result details.detail summary::-webkit-details-marker { display: none; }
.result details.detail summary::after { content: "접기"; color: var(--muted); font-weight: 400; font-size: .85rem; }
.result details.detail:not([open]) summary::after { content: "펼치기"; }
.result table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.result td, .result th { padding: 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; word-break: keep-all; }
.result tr:last-child td { border-bottom: 0; }
.result td:first-child { min-width: 6.5em; padding-right: 10px; }
.result td:last-child { text-align: right; font-variant-numeric: tabular-nums; padding-left: 8px; }
.result th { text-align: left; font-weight: 600; font-size: .88rem; color: var(--muted); }
.result th.num, .result td.num { text-align: right; white-space: nowrap; padding-left: 8px; }
.result table.cols3 { font-size: .9rem; }
.result table.cols3 td:last-child { text-align: right; }
.result tr.sum td { font-weight: 700; }
.result h2 { margin-top: 24px; font-size: 1.05rem; }
.result .tablewrap { margin-top: 4px; }
.warn, .result .note { background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 10px; padding: 12px 14px; font-size: .9rem; margin: 16px 0 0; color: var(--fg); }
.trust { color: var(--muted); font-size: .85rem; margin: 16px 0 0; line-height: 1.6; }
.trust a { color: var(--muted); }
.note { font-size: .9rem; color: var(--muted); margin: 12px 0 0; }

/* 설명·FAQ·관련 */
.faq h3 { font-size: 1rem; margin: 18px 0 4px; }
.faq h3:first-of-type { margin-top: 8px; }
.faq p { margin: 0 0 8px; font-size: .95rem; color: var(--fg); }
.related ul { list-style: none; padding: 0; margin: 0; }
.related li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.related li:last-child { border-bottom: 0; padding-bottom: 0; }
.related a { color: var(--fg); text-decoration: none; font-weight: 600; }
.related a:hover { color: var(--accent); }
.related span { display: block; color: var(--muted); font-size: .88rem; font-weight: 400; }
.disclaimer { font-size: .82rem; color: var(--muted); margin: 24px 0 0; }

/* 첫 화면 목록 */
.hero { padding: 8px 0 28px; }
.hero h1 { font-size: clamp(1.7rem, 7vw, 2.2rem); margin-bottom: 10px; }
.group-title { font-size: .9rem; font-weight: 700; color: var(--fg); margin: 0 0 8px; padding-bottom: 8px; border-bottom: 2px solid var(--fg); letter-spacing: 0; line-height: 1.4; }
.tool-groups { display: grid; gap: 32px; }
.tool-groups ul.tools { border-top: 0; }
.more { margin: 12px 0 0; font-weight: 600; font-size: .95rem; }
.more a { text-decoration: none; }
.more a::after { content: " ›"; }
.more a:hover { text-decoration: underline; }
ul.tools { list-style: none; padding: 0; margin: 0; }
ul.tools li { border-bottom: 1px solid var(--line); }
ul.tools li a { display: block; position: relative; padding: 16px 28px 16px 0; color: var(--fg); text-decoration: none; font-weight: 600; font-size: 1.05rem; }
ul.tools li a::after { content: "›"; position: absolute; right: 4px; top: 50%; transform: translateY(-52%); color: var(--muted); font-size: 1.5rem; font-weight: 300; }
ul.tools li a:hover { color: var(--accent); }
ul.tools li span { display: block; font-weight: 400; color: var(--muted); font-size: .9rem; margin-top: 2px; }
.section-title { font-size: .9rem; font-weight: 700; margin: 48px 0 8px; padding-bottom: 8px; border-bottom: 2px solid var(--fg); line-height: 1.4; }
table.ratebox { width: 100%; border-collapse: collapse; font-size: .95rem; }
table.ratebox td { padding: 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
table.ratebox tr:last-child td { border-bottom: 0; }
table.ratebox td:last-child { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; padding-left: 12px; }

/* 고지·소개 */
.legal h2 { font-size: 1.05rem; margin: 22px 0 6px; }
.legal p, .legal li { font-size: .95rem; }
.legal ol, .legal ul { padding-left: 20px; }

/* 해설 글 */
.article { max-width: 680px; margin-left: auto; margin-right: auto; border: 0; padding: 0; background: transparent; }
.article h1 { font-size: 1.7rem; margin-bottom: 6px; }
.article h2 { font-size: 1.25rem; margin: 40px 0 10px; padding-top: 4px; }
.article p, .article li { font-size: 1.02rem; line-height: 1.8; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin: 4px 0; }
.article .meta { color: var(--muted); font-size: .88rem; margin: 0 0 20px; }
.article .formula { background: var(--surface); border-radius: 12px; padding: 14px 16px; font-weight: 600; font-size: 1rem; border: 1px solid var(--line); }
.article .sources { font-size: .88rem; overflow-wrap: anywhere; }
.article .sources li { font-size: .88rem; line-height: 1.6; }
.article .disclaimer { border-top: 1px solid var(--line); padding-top: 16px; }
.tablewrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 12px 0 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg); }
table.data { width: 100%; border-collapse: collapse; font-size: .92rem; margin: 0; }
table.data th, table.data td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; word-break: keep-all; }
table.data tr:last-child td { border-bottom: 0; }
table.data th { color: var(--muted); font-weight: 600; font-size: .84rem; background: var(--surface); white-space: nowrap; }
table.data .num { text-align: right; font-variant-numeric: tabular-nums; }
table.data td.num { white-space: nowrap; }
table.data tr.sum td { font-weight: 700; background: var(--surface); }
a.cta { display: block; text-align: center; margin: 32px 0 8px; padding: 16px; font-weight: 700; color: var(--on-accent); background: var(--accent); border-radius: 12px; text-decoration: none; }
a.cta:hover { filter: brightness(1.06); }

/* 푸터 */
footer.site { border-top: 1px solid var(--line); margin-top: 48px; background: var(--surface); }
footer.site .foot { max-width: 720px; margin: 0 auto; padding: 32px 20px 48px; font-size: .9rem; color: var(--muted); }
footer.site .brand { font-weight: 800; color: var(--fg); font-size: 1rem; margin: 0 0 6px; }
footer.site .principle { margin: 0 0 28px; line-height: 1.7; }
footer.site .fgroups { display: grid; gap: 28px; }
footer.site nav { display: grid; grid-template-columns: 1fr 1fr; column-gap: 16px; }
footer.site .ftitle { grid-column: 1 / -1; margin: 0 0 4px; font-weight: 700; font-size: .85rem; color: var(--fg); }
footer.site a { color: var(--muted); text-decoration: none; display: flex; align-items: center; min-height: 40px; line-height: 1.4; }
footer.site a:hover { color: var(--fg); text-decoration: underline; }

[hidden] { display: none !important; }
@media (max-width: 400px) {
  main { padding: 24px 16px 16px; }
  .card { padding: 18px 16px; }
  header.site .bar, footer.site .foot { padding-left: 16px; padding-right: 16px; }
  header.site nav { gap: 14px; }
  .row { gap: 10px; }
}
@media (min-width: 720px) {
  footer.site .fgroups { grid-template-columns: 1.5fr 1fr; gap: 40px; align-items: start; }
  footer.site nav { column-gap: 24px; align-content: start; }
  footer.site nav[aria-label="계산기"] { grid-template-columns: repeat(3, 1fr); }
  footer.site a { min-height: 34px; }
}
@media (min-width: 960px) {
  body.home header.site .bar, body.home main, body.home footer.site .foot { max-width: 1000px; }
  body.home .hero { max-width: 720px; }
  .tool-groups { grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* 계산 기준과 출처 */
table.srctable { min-width: 760px; }
table.srctable td { font-size: .88rem; line-height: 1.6; }
table.srctable td:first-child { min-width: 8.5em; }
table.srctable tr.grp th { background: var(--bg); color: var(--fg); font-size: .95rem; padding-top: 18px; }
.src-list { margin: 6px 0 4px; padding-left: 16px; font-size: .82rem; overflow-wrap: anywhere; }
.src-list li { margin: 2px 0; }
.st { display: inline-block; margin-top: 4px; font-size: .78rem; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 0 8px; }
main.wide { max-width: 1040px; }
main.wide .lead { max-width: 720px; }
main.wide .card { max-width: 720px; }
table.srctable { min-width: 0; }
table.srctable td:nth-child(3) { min-width: 18em; }
@media (max-width: 800px) { table.srctable { min-width: 760px; } }
input[type=date] { min-width: 0; text-align: left; }
@media (max-width: 480px) { .row.stack { flex-direction: column; gap: 0; } .row.stack > div + div label { margin-top: 18px; } }
form > * + .row { margin-top: 18px; }

/* 계산 기준: 결과 아래 접힘 */
details.faq { padding: 0; }
details.faq > summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; padding: 18px 20px; font-weight: 700; font-size: 1rem; color: var(--fg); }
details.faq > summary::-webkit-details-marker { display: none; }
details.faq > summary::after { content: "펼치기"; color: var(--muted); font-weight: 400; font-size: .85rem; }
details.faq[open] > summary::after { content: "접기"; }
details.faq > summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; border-radius: var(--radius); }
details.faq[open] > summary { border-bottom: 1px solid var(--line); }
details.faq .faq-body { padding: 4px 20px 20px; }
@media (max-width: 400px) { details.faq > summary { padding: 16px; } details.faq .faq-body { padding: 4px 16px 18px; } }

#graceBox { margin-top: 18px; }
#graceBox label { margin-top: 0; }