:root {
  --accent: #1b4d8f;
  --accent-soft: #eef3fa;
  --accent-line: #cddcf0;
  --ink: #16202b;
  --ink-mid: #4a5765;
  --ink-soft: #78838f;
  --line: #e3e7ec;
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg-alt);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic",
    "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  word-break: keep-all;
}

.wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- header ---------- */

.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  padding: 22px 0 26px;
}

.brand {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 10px;
}
.brand-dot { color: var(--ink-soft); }

h1 {
  margin: 0 0 8px;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 0 12px;
  color: var(--ink-mid);
  font-size: 15px;
}
.lead strong { color: var(--ink); }

.privacy-badge {
  display: inline-block;
  margin: 0;
  padding: 6px 11px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 600;
}

/* ---------- top nav ---------- */

.site-nav {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-nav .wrap {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-top: 9px;
  padding-bottom: 9px;
  scrollbar-width: none;
}
.site-nav .wrap::-webkit-scrollbar { display: none; }

.nav-pill {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  color: var(--ink-mid);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .12s, border-color .12s, color .12s;
}
.nav-pill:hover { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }

.nav-pill.is-current {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.nav-pill.is-current:hover { background: var(--accent); color: #fff; }

/* ---------- other calculators ---------- */

.calc-links h2 { margin-bottom: 14px; }

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.calc-card {
  display: block;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg-alt);
  text-decoration: none;
  transition: border-color .12s, background-color .12s, transform .12s;
}
.calc-card:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.calc-card-title {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 3px;
}
.calc-card-title::after {
  content: " →";
  font-weight: 400;
}

.calc-card-desc {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-mid);
}

/* ---------- hub (홈) ---------- */

.hub-card .calc-card { padding: 18px 17px; }
.hub-card .calc-card-title { font-size: 17.5px; }
.hub-card .calc-card-desc { font-size: 13.5px; }

.calc-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 11px;
}
.calc-card-tags span {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 11.5px;
  font-weight: 600;
}
.calc-card:hover .calc-card-tags span { border-color: var(--accent-line); }

.pick-list {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.pick-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14px;
}
.pick-row + .pick-row { border-top: 1px solid var(--line); }

.pick-q { color: var(--ink-mid); }

.pick-a {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.pick-a::after { content: " →"; font-weight: 400; }
.pick-a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- cards ---------- */

main { padding: 16px 16px 8px; }

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 16px;
  margin: 0 0 16px;
}

.card h2 {
  margin: 0 0 4px;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.card h3 {
  margin: 26px 0 8px;
  font-size: 16.5px;
  letter-spacing: -0.01em;
}

.section-desc {
  margin: 0 0 16px;
  color: var(--ink-soft);
  font-size: 13.5px;
}

/* ---------- item list ---------- */

.item-list { display: flex; flex-direction: column; gap: 10px; }

.item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: var(--bg);
}

.item-line {
  display: flex;
  align-items: center;
  gap: 8px;
}
.item-line + .item-line { margin-top: 8px; }

input[type="text"], select {
  font: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px 10px;
  min-width: 0;
  -webkit-appearance: none;
  appearance: none;
}

input[type="text"]:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.item-name { flex: 1 1 auto; font-weight: 600; }

.item-period {
  flex: 0 0 auto;
  width: 88px;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
                    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 15px) 50%, calc(100% - 10px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 26px;
  font-size: 14px;
}

.input-unit { display: flex; align-items: center; gap: 6px; }
.input-unit.amount { flex: 1 1 auto; justify-content: flex-end; }
.input-unit input {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.input-unit.amount input { width: 100%; max-width: 190px; }
.unit { color: var(--ink-soft); font-size: 14px; flex: 0 0 auto; }

.chk {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  min-height: 36px;
  padding-right: 4px;
  font-size: 13.5px;
  color: var(--ink-mid);
  cursor: pointer;
  user-select: none;
}
.chk input { width: 17px; height: 17px; accent-color: var(--accent); margin: 0; }

.item-tools { justify-content: space-between; }

.note-toggle, .item-remove {
  font: inherit;
  font-size: 12.5px;
  background: none;
  border: none;
  padding: 8px 2px;
  min-height: 34px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.note-toggle { color: var(--accent); }
.item-remove { color: var(--ink-soft); }

.item-note {
  margin: 8px 0 0;
  padding: 9px 11px;
  background: var(--accent-soft);
  border-radius: 7px;
  color: var(--ink-mid);
  font-size: 13px;
  line-height: 1.6;
}

.list-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.item-count { color: var(--ink-soft); font-size: 12.5px; margin-right: auto; }

.btn {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  border-radius: 7px;
  padding: 9px 14px;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-secondary { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }
.btn-secondary:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-ghost { background: none; border-color: var(--line); color: var(--ink-soft); }

/* ---------- weekly hours field ---------- */

.field-row {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.field-row label { display: block; font-weight: 600; font-size: 14.5px; margin-bottom: 8px; }
.field-row .input-unit input { width: 90px; text-align: center; }

.hint { margin: 8px 0 0; color: var(--ink-soft); font-size: 12.5px; line-height: 1.55; }
.hint.warn:not(:empty) { color: #9a5b00; }

/* ---------- results ---------- */

.result-card { border-color: var(--accent-line); }

.result-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 16px 0 14px;
}

.result-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 16px;
  background: var(--bg-alt);
}

.result-label {
  display: block;
  font-size: 13px;
  color: var(--ink-mid);
  margin-bottom: 2px;
}

.result-value {
  display: block;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
}
.result-value em { font-style: normal; font-size: 15px; font-weight: 600; margin-left: 3px; }

.result-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.result-primary .result-label { color: #cfe0f5; }
.result-primary .result-value { font-size: 36px; }

.result-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
}
.result-meta dt { font-size: 12.5px; color: var(--ink-soft); }
.result-meta dd {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.formula {
  margin: 12px 0 0;
  padding: 9px 11px;
  background: var(--bg-alt);
  border-radius: 7px;
  color: var(--ink-soft);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

/* ---------- annual salary ---------- */

.annual-list {
  margin: 0 0 12px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.annual-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 14px;
}
.annual-row + .annual-row { border-top: 1px solid var(--line); }

.annual-row dt { font-size: 14px; font-weight: 600; color: var(--ink-mid); }
.annual-row dt small {
  display: block;
  font-size: 11.5px;
  font-weight: 400;
  color: var(--ink-soft);
  margin-top: 1px;
}

.annual-row dd {
  margin: 0;
  flex: 0 0 auto;
  text-align: right;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.annual-row dd em { font-style: normal; font-size: 13px; font-weight: 600; margin-left: 2px; }

.annual-highlight {
  background: var(--accent);
  color: #fff;
}
.annual-highlight dt { color: #fff; }
.annual-highlight dt small { color: #cfe0f5; }
.annual-highlight dd { font-size: 23px; }

/* ---------- extra pay table ---------- */

.extra-table { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }

.extra-row {
  display: grid;
  grid-template-columns: 1fr 44px 72px 1fr;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  font-size: 14px;
}
.extra-row + .extra-row { border-top: 1px solid var(--line); }
.extra-row small { display: block; font-size: 11.5px; color: var(--ink-soft); }

.extra-head {
  background: var(--bg-alt);
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 600;
}
.extra-head span:nth-child(2), .extra-head span:nth-child(3) { text-align: center; }
.extra-head span:last-child { text-align: right; }

.extra-row .rate { text-align: center; color: var(--ink-soft); font-size: 13px; }
.extra-row input { width: 100%; text-align: center; padding: 7px 4px; font-variant-numeric: tabular-nums; }
.extra-row .pay { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }

.extra-total { background: var(--accent-soft); font-weight: 700; }
.extra-total .pay { color: var(--accent); }

.link-btn {
  font: inherit;
  font-size: 12.5px;
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- alert ---------- */

.alert {
  margin: 0 0 14px;
  padding: 11px 13px;
  background: #fdf6e7;
  border: 1px solid #e8d093;
  border-left: 3px solid #c98a1b;
  border-radius: 7px;
  color: #6b4a08;
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- net pay ---------- */

.net-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
  margin-bottom: 4px;
}
.net-field:first-child { grid-column: 1 / -1; }
.net-field label { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 6px; }
.net-field .input-unit input { width: 100%; }

.deduct-table {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
}

.deduct-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  font-size: 14px;
}
.deduct-row + .deduct-row { border-top: 1px solid var(--line); }
.deduct-row small { display: block; font-size: 11.5px; color: var(--ink-soft); font-weight: 400; }
.deduct-row .amt { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

.deduct-head {
  background: var(--bg-alt);
  font-size: 12px;
  color: var(--ink-soft);
  font-weight: 600;
}
.deduct-total { background: var(--accent-soft); font-weight: 700; }
.deduct-total .amt { color: var(--accent); }

.net-grid { margin-top: 0; }

/* ---------- article content ---------- */

.content p { margin: 0 0 14px; font-size: 15px; color: var(--ink-mid); }
.content p strong { color: var(--ink); }
.content h3:first-of-type { margin-top: 18px; }
.content a { color: var(--accent); }

.faq { margin-top: 12px; }

.faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
  margin-bottom: 8px;
  background: var(--bg);
}
.faq summary {
  padding: 13px 14px;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 38px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 11px;
  color: var(--accent);
  font-size: 18px;
  font-weight: 400;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0; padding: 0 14px 14px; font-size: 14px; }

/* ---------- footer ---------- */

.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--line);
  margin-top: 8px;
  padding: 22px 0 32px;
}

.disclaimer {
  margin: 0 0 14px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.disclaimer strong { color: var(--ink-mid); }

.footer-nav { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.footer-nav a { color: var(--accent); font-size: 13.5px; text-decoration: none; font-weight: 600; }
.footer-nav a:hover { text-decoration: underline; }

.copyright { margin: 0; font-size: 12px; color: var(--ink-soft); }

/* ---------- ad slots (자리만 확보) ---------- */

.ad-slot {
  max-width: 720px;
  margin: 0 auto 16px;
  min-height: 100px;
}
.ad-inline { margin: 24px 0; }

/* ---------- desktop ---------- */

@media (min-width: 640px) {
  h1 { font-size: 30px; }
  .card { padding: 24px; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .calc-grid { grid-template-columns: 1fr 1fr; }
  .result-primary .result-value { font-size: 38px; }
  .extra-row { grid-template-columns: 1fr 56px 96px 1fr; font-size: 14.5px; }
}