:root {
  --ink: #12161c;
  --ink-soft: #4a5260;
  --line: #dfe3e9;
  --bg: #f6f7f9;
  --card: #ffffff;
  --brand: #1c5bd8;
  --brand-ink: #0f3f9c;
  --warn: #8a4b00;
  --warn-bg: #fff6e5;
  --ok: #0f6b3d;
  --ok-bg: #eefaf2;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

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

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

a {
  color: var(--brand-ink);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 8px 12px;
  z-index: 10;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.site-header .inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  margin-right: 4px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 0.93rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: 2px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a[aria-current="page"] {
  color: var(--brand-ink);
  border-bottom-color: var(--brand);
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 16px 56px;
}

h1 {
  font-size: 1.55rem;
  line-height: 1.35;
  margin: 8px 0 12px;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.4;
  margin: 32px 0 10px;
}

h3 {
  font-size: 1.02rem;
  margin: 20px 0 8px;
}

p,
li {
  color: var(--ink);
}

.lede {
  color: var(--ink-soft);
  font-size: 1.02rem;
  margin: 0 0 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  margin: 16px 0;
}

.card.tight {
  padding: 12px;
}

.grid {
  display: grid;
  gap: 12px;
}

@media (min-width: 720px) {
  .grid.two {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.93rem;
  margin-bottom: 4px;
}

.hint {
  display: block;
  font-weight: 400;
  color: var(--ink-soft);
  font-size: 0.85rem;
  margin-top: 2px;
}

input[type="text"],
input[type="date"],
input[type="number"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid #c6ccd6;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

textarea {
  min-height: 96px;
}

input:focus,
select:focus,
textarea:focus,
button:focus,
a:focus {
  outline: 3px solid rgba(28, 91, 216, 0.35);
  outline-offset: 1px;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  margin: 12px 0;
}

legend {
  font-weight: 700;
  padding: 0 6px;
}

.check {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-weight: 400;
  font-size: 0.95rem;
  margin: 8px 0;
}

.check input {
  width: 20px;
  height: 20px;
  margin-top: 3px;
  flex: 0 0 auto;
}

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
}

button.secondary,
.btn.secondary {
  background: #fff;
  color: var(--brand-ink);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

fieldset.step {
  background: var(--card);
}

.step-legend {
  font-size: 0.8rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

.result {
  margin-top: 20px;
}

.result-headline {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.4;
  margin: 4px 0 6px;
}

.result-amount {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--brand-ink);
  margin: 4px 0 10px;
}

.badge {
  display: inline-block;
  font-size: 0.78rem;
  line-height: 1.4;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef1f6;
  color: var(--ink-soft);
  margin: 0 6px 6px 0;
}

.badge.warn {
  background: var(--warn-bg);
  color: var(--warn);
}

.badge.ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.notice {
  border-left: 4px solid #c2ccdb;
  background: #f3f5f9;
  padding: 10px 12px;
  border-radius: 0 8px 8px 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.error-box {
  border-left: 4px solid #b3261e;
  background: #fdecea;
  color: #6b1710;
  padding: 10px 12px;
  border-radius: 0 8px 8px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 10px 0;
}

.table-wrap {
  overflow-x: auto;
}

th,
td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f1f4f8;
  font-weight: 700;
  white-space: nowrap;
}

td.num {
  text-align: right;
  white-space: nowrap;
}

dl.kv {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 6px 12px;
  margin: 10px 0;
  font-size: 0.95rem;
}

dl.kv dt {
  color: var(--ink-soft);
}

dl.kv dd {
  margin: 0;
}

ul.reasons {
  padding-left: 1.15rem;
  font-size: 0.93rem;
}

ul.reasons li {
  margin: 3px 0;
}

pre.letter {
  white-space: pre-wrap;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.86rem;
  line-height: 1.7;
  overflow-x: auto;
}

.case-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  padding: 12px;
  margin: 10px 0;
}

.case-item .top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  align-items: baseline;
}

.case-name {
  font-weight: 700;
}

.dday {
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.dday.soon {
  color: var(--warn);
}

.dday.past {
  color: #8a2718;
}

.toc {
  padding-left: 1.1rem;
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 20px 16px 40px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.site-footer .inner {
  max-width: 980px;
  margin: 0 auto;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin-bottom: 8px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 14px;
}

.tabs a {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  text-decoration: none;
  font-size: 0.9rem;
}

.tabs a[aria-current="page"] {
  border-color: var(--brand);
  color: var(--brand-ink);
  font-weight: 700;
}

@media print {
  @page {
    size: A4;
    margin: 12mm;
  }

  body {
    background: #fff;
  }

  .site-header,
  .site-footer,
  form,
  .no-print,
  .tabs,
  .actions,
  .badge,
  .hint,
  .notice {
    display: none !important;
  }

  main {
    max-width: none;
    padding: 0;
  }

  .card,
  pre.letter {
    border: none;
    padding: 0;
    margin: 0;
  }

  h2 {
    font-size: 13pt;
    margin: 0 0 8px;
  }

  pre.letter {
    font-size: 9.5pt;
    line-height: 1.45;
  }
}