:root {
  --ink: #18181a;
  --ink-soft: #5c5850;
  --ink-faint: #8a8578;
  --paper: #f7f4ec;
  --paper-card: #fbf9f3;
  --paper-alt: #efe9da;
  --line: #ddd6c3;
  --accent: #a8461e;
  --accent-ink: #7e3416;
  --accent-soft: #f0ddc9;
  --danger: #9c2f22;
  --radius: 3px;
  --max-width: 860px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic",
    "Noto Sans KR", sans-serif;
  line-height: 1.65;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}

.mono, .result-headline .value, .result-table td, .value-num {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  font-variant-numeric: tabular-nums;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  flex-wrap: wrap;
  gap: 14px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 23px;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.logo:hover { text-decoration: none; }
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--ink);
  color: var(--paper);
  font-size: 17px;
  font-weight: 700;
  border-radius: 3px;
  flex-shrink: 0;
}
.logo span { color: var(--ink); }
.site-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* Main */
main { padding: 40px 0 64px; }

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 10px;
}

.page-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.page-desc {
  color: var(--ink-soft);
  font-size: 15px;
  margin: 0 0 30px;
  max-width: 56ch;
}

.card {
  background: var(--paper-card);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 22px;
}

.form-row {
  margin-bottom: 18px;
}
.form-row label {
  display: block;
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 7px;
  color: var(--ink);
}
.form-row .hint {
  font-weight: 400;
  color: var(--ink-faint);
  font-size: 12px;
  margin-left: 4px;
}
.input-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.form-row input[type="number"],
.form-row input[type="text"],
.form-row input[type="date"],
.form-row select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  background: var(--paper);
  color: var(--ink);
  font-family: inherit;
}
.form-row input:focus, .form-row select:focus {
  outline: none;
  border-color: var(--ink);
}
.unit { color: var(--ink-faint); font-size: 13px; white-space: nowrap; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
}

.radio-group { display: flex; gap: 16px; flex-wrap: wrap; }
.radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  color: var(--ink);
}
.radio-group input[type="radio"] { accent-color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 14px 22px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  transition: background .12s, color .12s;
}
.btn::after { content: "→"; }
.btn:hover { background: var(--accent); border-color: var(--accent); text-decoration: none; }

/* Result */
.result {
  display: none;
  margin-top: 26px;
}
.result.show { display: block; }
.result-headline {
  background: var(--paper);
  border: 1px solid var(--ink);
  border-top: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px 20px;
  margin-bottom: 4px;
}
.result-headline .label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 700;
  margin-bottom: 8px;
}
.result-headline .value {
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
}
.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 4px;
}
.result-table th, .result-table td {
  text-align: left;
  padding: 11px 2px;
  border-bottom: 1px dashed var(--line);
  font-weight: 400;
}
.result-table th { color: var(--ink-soft); font-weight: 500; width: 55%; }
.result-table td { text-align: right; font-weight: 600; color: var(--ink); }
.result-table tr.total td, .result-table tr.total th {
  border-top: 1px solid var(--ink);
  border-bottom: none;
  color: var(--ink);
  font-weight: 700;
  padding-top: 12px;
}

.disclaimer {
  background: none;
  border: none;
  border-left: 3px solid var(--accent);
  border-radius: 0;
  padding: 4px 0 4px 14px;
  font-size: 12.5px;
  color: var(--ink-soft);
  margin-top: 20px;
}
.disclaimer::before {
  content: "참고";
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-ink);
  margin-bottom: 4px;
}

.info-box {
  background: var(--paper-alt);
  border-radius: var(--radius);
  padding: 22px 24px;
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-top: 32px;
}
.info-box h3 {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 12px;
  font-weight: 700;
}
.info-box ul { margin: 0; padding-left: 18px; }
.info-box li { margin-bottom: 8px; }

/* Home tool index list */
.tool-list {
  margin-top: 30px;
  border-top: 1px solid var(--ink);
}
.tool-row {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  transition: background .12s;
}
.tool-row:hover {
  background: var(--paper-alt);
  text-decoration: none;
}
.tool-row .idx {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--accent-ink);
  font-weight: 700;
  width: 22px;
  flex-shrink: 0;
}
.tool-row .tool-body { flex: 1; min-width: 0; }
.tool-row h2 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.tool-row p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}
.tool-row .arrow {
  font-size: 18px;
  color: var(--ink-faint);
  flex-shrink: 0;
  transition: transform .12s, color .12s;
}
.tool-row:hover .arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.hero {
  padding: 10px 0 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 4px;
}
.hero h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  max-width: 20ch;
}
.hero p {
  color: var(--ink-soft);
  font-size: 15.5px;
  max-width: 52ch;
}

/* Footer */
.site-footer {
  border-top: 2px solid var(--ink);
  padding: 26px 0 44px;
  margin-top: 48px;
}
.site-footer .container {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--ink-soft);
  font-size: 12.5px;
}
.copyright {
  color: var(--ink-faint);
  font-size: 12px;
}

.ad-slot {
  margin: 26px 0;
  text-align: center;
  color: var(--ink-faint);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px dashed var(--line);
  border-radius: 0;
  padding: 12px;
}

.legal h2 { font-size: 16px; margin-top: 30px; font-weight: 700; }
.legal p, .legal li { color: var(--ink-soft); font-size: 14px; }
.legal strong { color: var(--ink); }