/* ===== Tokens ===== */
:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #111827;
  --text-2: #374151;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2152e0;
  --primary-2: #1a43bb;
  --primary-weak: #eef3ff;
  --accent: #0b8a64;
  --accent-weak: #e7f7f1;
  --warn: #b45309;
  --warn-weak: #fff7e6;
  --danger: #c02626;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 16px rgba(16, 24, 40, .06);
  --maxw: 1080px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1117;
    --card: #161b24;
    --text: #eef1f6;
    --text-2: #cfd5df;
    --muted: #97a0af;
    --border: #283040;
    --primary: #6b93ff;
    --primary-2: #8aa9ff;
    --primary-weak: #1a2440;
    --accent: #3fd0a0;
    --accent-weak: #11291f;
    --warn: #f5b454;
    --warn-weak: #2b2210;
    --danger: #ff7a7a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "맑은 고딕", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
h1, h2, h3 { line-height: 1.3; letter-spacing: -0.02em; }
h1 { font-size: clamp(1.6rem, 4.5vw, 2.2rem); margin: 0 0 .4rem; }
h2 { font-size: 1.35rem; margin: 2.2rem 0 .8rem; }
h3 { font-size: 1.08rem; margin: 1.4rem 0 .5rem; }
p { margin: .6rem 0; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { border-bottom: 1px solid var(--border); padding: .6rem .5rem; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: color-mix(in srgb, var(--bg) 60%, transparent); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent); outline-offset: 2px; }

/* ===== Layout ===== */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; gap: 12px; height: 58px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; color: var(--text); font-size: 1.08rem; letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }
.logo-mark { width: 30px; height: 30px; border-radius: 9px; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: .9rem; font-weight: 800; }
.top-nav { display: flex; gap: 2px; margin-left: auto; }
.top-nav a { color: var(--text-2); padding: 8px 10px; border-radius: 8px; font-size: .94rem; font-weight: 600; }
.top-nav a:hover, .top-nav a[aria-current="page"] { background: var(--primary-weak); color: var(--primary); text-decoration: none; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 7px 12px; font: inherit; font-weight: 600; cursor: pointer; }
.drawer { display: none; border-top: 1px solid var(--border); background: var(--card); }
.drawer.open { display: block; }
.drawer ul { list-style: none; margin: 0; padding: 8px 16px 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.drawer a { display: block; padding: 10px 8px; border-radius: 8px; color: var(--text); font-weight: 600; font-size: .95rem; }
.drawer a:hover { background: var(--primary-weak); text-decoration: none; }
@media (max-width: 860px) {
  .top-nav { display: none; }
  .menu-btn { display: inline-block; }
}

main { padding: 20px 0 40px; }
.breadcrumb { font-size: .85rem; color: var(--muted); margin: 4px 0 12px; }
.breadcrumb a { color: var(--muted); }
.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.lead { color: var(--text-2); margin: 0 0 4px; }
.meta-line { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .82rem; color: var(--muted); margin-top: 6px; }
.meta-line span::before { content: "✓ "; color: var(--accent); font-weight: 700; }

.grid-2 { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 18px; align-items: start; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: minmax(0, 1fr); } }

/* ===== Cards ===== */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.card + .card { margin-top: 16px; }
.card h2:first-child, .card h3:first-child { margin-top: 0; }
.content { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 22px 22px; margin-top: 18px; }
.content h2 { padding-top: 6px; }
.content ul, .content ol { padding-left: 1.2rem; }
.content li { margin: .3rem 0; }
@media (max-width: 520px) { .card { padding: 16px; } .content { padding: 4px 16px 18px; } }

/* ===== Form controls ===== */
.seg { display: grid; grid-template-columns: 1fr 1fr; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 4px; gap: 4px; margin-bottom: 16px; }
.seg.three { grid-template-columns: repeat(3, 1fr); }
.seg button { border: 0; background: transparent; color: var(--muted); border-radius: 9px; padding: 10px 6px; font: inherit; font-weight: 700; font-size: .95rem; cursor: pointer; line-height: 1.25; }
.seg button small { display: block; font-weight: 500; font-size: .76rem; opacity: .85; }
.seg button[aria-selected="true"] { background: var(--card); color: var(--primary); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }

.field { margin-bottom: 14px; }
.field-label, .field > label { display: block; font-weight: 700; font-size: .92rem; margin-bottom: 6px; color: var(--text-2); }
.field .hint { font-size: .8rem; color: var(--muted); margin: 4px 0 0; }
.row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }
.row > * { min-width: 0; }
.row.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 520px) { .row, .row.three { grid-template-columns: 1fr; } }

.money { display: flex; align-items: center; border: 2px solid var(--border); border-radius: 12px; background: var(--card); padding: 0 14px; transition: border-color .15s; }
.money:focus-within { border-color: var(--primary); }
.money input { flex: 1; min-width: 0; width: 100%;border: 0; outline: 0; background: transparent; color: var(--text); font: inherit; font-size: 1.12rem; font-weight: 700; padding: 12px 0; text-align: right; font-variant-numeric: tabular-nums; }
.money.big input { font-size: 1.6rem; padding: 14px 0; }
.money span { margin-left: 6px; color: var(--muted); font-weight: 600; white-space: nowrap; }
.money:focus-within { box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 15%, transparent); }
input[type="date"], input[type="text"], input[type="number"], select {
  width: 100%; border: 2px solid var(--border); border-radius: 12px; background: var(--card); color: var(--text);
  font: inherit; padding: 11px 12px; outline: 0;
}
input[type="date"]:focus, input[type="text"]:focus, input[type="number"]:focus, select:focus { border-color: var(--primary); }
.check { display: flex; align-items: flex-start; gap: 8px; font-size: .93rem; margin: 8px 0; cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: 3px; accent-color: var(--primary); }
.hangul { min-height: 1.4em; font-size: .88rem; color: var(--primary); text-align: right; margin: 6px 2px 0; font-weight: 600; }
.quick { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px; }
.chip { border: 1px solid var(--border); background: var(--card); color: var(--text-2); border-radius: 999px; padding: 6px 12px; font: inherit; font-size: .85rem; font-weight: 600; cursor: pointer; }
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.ghost { color: var(--muted); }

details.opts { margin-top: 10px; border: 1px dashed var(--border); border-radius: 12px; padding: 4px 12px; }
details.opts summary { cursor: pointer; font-weight: 600; font-size: .9rem; color: var(--text-2); padding: 8px 0; }
details.opts[open] { padding-bottom: 12px; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 0; border-radius: 12px; background: var(--primary); color: #fff; font: inherit; font-weight: 700; padding: 12px 18px; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--primary-2); text-decoration: none; }
.btn.secondary { background: var(--primary-weak); color: var(--primary); }
.btn.line { background: transparent; border: 1px solid var(--border); color: var(--text-2); }
.btn.block { width: 100%; }
.btn.sm { padding: 8px 12px; font-size: .88rem; border-radius: 10px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* ===== Results ===== */
.result { margin-top: 16px; border-radius: 14px; background: var(--bg); border: 1px solid var(--border); overflow: hidden; }
.result-row { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.result-row:last-child { border-bottom: 0; }
.result-row .k { color: var(--text-2); font-weight: 600; font-size: .95rem; }
.result-row .k small { display: block; font-weight: 500; color: var(--muted); font-size: .76rem; }
.result-row .v { margin-left: auto; font-weight: 800; font-size: 1.15rem; font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.result-row.main { background: var(--primary-weak); }
.result-row.main .v { color: var(--primary); font-size: clamp(1.15rem, 5.2vw, 1.45rem); }
@media (max-width: 420px) { .result-row { padding: 12px 10px; gap: 8px; } .result-row .v { font-size: 1.05rem; } }
.result-row.good .v { color: var(--accent); }
.result-row.bad .v { color: var(--danger); }
.result-row.sub .k, .result-row.sub .v { font-size: .9rem; font-weight: 600; color: var(--muted); }
.copy { border: 1px solid var(--border); background: var(--card); color: var(--muted); border-radius: 8px; font: inherit; font-size: .76rem; padding: 4px 8px; cursor: pointer; flex-shrink: 0; }
.copy:hover { color: var(--primary); border-color: var(--primary); }
.big-result { text-align: center; padding: 18px 12px; background: var(--primary-weak); border-radius: 14px; margin-top: 16px; }
.big-result .label { color: var(--text-2); font-weight: 600; font-size: .92rem; }
.big-result .value { font-size: clamp(1.7rem, 6vw, 2.3rem); font-weight: 800; color: var(--primary); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.big-result .sub { color: var(--muted); font-size: .85rem; }
.big-result.good { background: var(--accent-weak); }
.big-result.good .value { color: var(--accent); }
.note { font-size: .8rem; color: var(--muted); margin: 10px 0 0; }
.callout { border-radius: 12px; padding: 12px 14px; font-size: .9rem; margin: 12px 0; background: var(--primary-weak); color: var(--text-2); }
.callout.warn { background: var(--warn-weak); }
.callout.warn strong { color: var(--warn); }
.callout.ok { background: var(--accent-weak); }
.formula { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; font-size: .88rem; overflow-x: auto; }
.pill { display: inline-block; font-size: .75rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--primary-weak); color: var(--primary); }
.pill.green { background: var(--accent-weak); color: var(--accent); }
.pill.warn { background: var(--warn-weak); color: var(--warn); }

/* ===== Batch table ===== */
.batch td { padding: 6px 4px; }
.batch input { width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 8px; font: inherit; font-size: .92rem; background: var(--card); color: var(--text); }
.batch input.n { text-align: right; font-variant-numeric: tabular-nums; }
.batch .del { background: none; border: 0; color: var(--muted); font-size: 1.1rem; cursor: pointer; padding: 4px 8px; }
.batch tfoot td { font-weight: 800; border-bottom: 0; }
@media (max-width: 620px) {
  .batch thead { display: none; }
  .batch tbody tr { display: grid; grid-template-columns: 1fr 70px 1fr 32px; gap: 4px; padding: 8px 0; border-bottom: 1px solid var(--border); }
  .batch tbody td { border: 0; padding: 0; }
  .batch tbody td.out { grid-column: 1 / -1; font-size: .82rem; color: var(--muted); text-align: right; }
  .batch tfoot tr { display: flex; flex-wrap: wrap; justify-content: space-between; }
}

/* ===== D-day ===== */
.dday-list { list-style: none; padding: 0; margin: 0; }
.dday-list li { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border); }
.dday-list li:last-child { border-bottom: 0; }
.dday-badge { min-width: 72px; flex-shrink: 0; white-space: nowrap;text-align: center; font-weight: 800; border-radius: 10px; padding: 6px 8px; background: var(--bg); color: var(--text-2); font-variant-numeric: tabular-nums; }
.dday-list li.next .dday-badge { background: var(--primary); color: #fff; }
.dday-list .t { font-weight: 700; }
.dday-list .d { font-size: .85rem; color: var(--muted); }

/* ===== Tool grid ===== */
.tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.tool { display: flex; gap: 12px; align-items: flex-start; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px; color: var(--text); transition: transform .12s, border-color .12s; }
.tool:hover { border-color: var(--primary); transform: translateY(-2px); text-decoration: none; }
.tool.current { border-color: var(--primary); background: var(--primary-weak); }
.tool.current b::after { content: " · 현재"; font-size: .75rem; font-weight: 600; color: var(--primary); }
.tool .ic { width: 40px; height: 40px; border-radius: 11px; background: var(--primary-weak); display: grid; place-items: center; font-size: 1.25rem; flex-shrink: 0; }
.tool b { display: block; font-size: .98rem; }
.tool span { display: block; font-size: .82rem; color: var(--muted); line-height: 1.45; margin-top: 2px; }

/* ===== Columns ===== */
.col-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.col-card { display: flex; flex-direction: column; gap: 6px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; color: var(--text); transition: transform .12s, border-color .12s; }
.col-card:hover { border-color: var(--primary); transform: translateY(-2px); text-decoration: none; }
.col-card .pill { align-self: flex-start; }
.col-card b { font-size: 1.02rem; line-height: 1.4; }
.col-card span:not(.pill) { font-size: .86rem; color: var(--muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.col-card small { color: var(--muted); font-size: .78rem; margin-top: auto; }
.article { max-width: 760px; }
.article .content { padding-top: 14px; font-size: 1.02rem; line-height: 1.8; }
.article .byline { font-size: .85rem; color: var(--muted); margin: 6px 0 0; }
.article .summary { background: var(--primary-weak); border-radius: 12px; padding: 14px 18px; margin: 14px 0; }
.article .summary b { display: block; margin-bottom: 4px; }
.article .summary ul { margin: 0; padding-left: 1.1rem; }
.cta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; background: var(--accent-weak); border-radius: 12px; padding: 14px 16px; margin: 18px 0; }
.cta p { margin: 0; font-weight: 600; }

/* ===== FAQ ===== */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { list-style: none; cursor: pointer; padding: 14px 28px 14px 0; font-weight: 700; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 1.3rem; color: var(--muted); font-weight: 400; }
.faq-item[open] summary::after { content: "−"; }
.faq-item > div { padding: 0 0 14px; color: var(--text-2); }

/* ===== Ads ===== */
.ad { display: none; margin: 18px auto; text-align: center; min-height: 100px; }
.ad.on { display: block; }
.ad::before { content: "광고"; display: block; font-size: .7rem; color: var(--muted); margin-bottom: 4px; }

/* ===== Toc ===== */
.toc { background: var(--bg); border-radius: 12px; padding: 12px 16px; margin: 14px 0; font-size: .92rem; }
.toc b { display: block; margin-bottom: 4px; }
.toc ol { margin: 0; padding-left: 1.2rem; }

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--border); background: var(--card); padding: 28px 0 36px; font-size: .88rem; color: var(--muted); }
.foot-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 20px; }
.foot-grid h3 { font-size: .9rem; color: var(--text-2); margin: 0 0 8px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin: 4px 0; }
.foot-grid a { color: var(--muted); }
.disclaimer { margin-top: 18px; font-size: .78rem; line-height: 1.6; }
@media (max-width: 720px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-grid > div:first-child { grid-column: 1 / -1; } }

/* ===== Toast ===== */
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px); background: #111827; color: #fff; padding: 10px 18px; border-radius: 999px; font-size: .9rem; opacity: 0; pointer-events: none; transition: .2s; z-index: 100; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Print ===== */
@media print {
  .site-header, .site-footer, .ad, .actions, .quick, details.opts, .content, .no-print, .breadcrumb { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; border: 0; }
}

.links-grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); }
.links-grid .tool b { font-size: .95rem; }

@media (max-width: 380px) { .logo { font-size: .98rem; } .logo-mark { width: 26px; height: 26px; } }