:root {
  --paper: #e6edf2;
  --sheet: #f8fbfd;
  --ink: #14202c;
  --mute: #3d5163;
  --rule: #7e97ab;
  --stamp: #c0142a;
  --focus: #1c5f8a;
  --ok: #0f5c45;
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a { color: inherit; }
a:hover { color: var(--focus); }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.mast {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 28px 0 18px;
  border-bottom: 2px solid var(--ink);
}
.word {
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  text-decoration: none;
}
.mast small {
  color: var(--mute);
  font-size: 0.82rem;
}

.hero {
  padding: 48px 0 28px;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  max-width: 16ch;
}
.hero p {
  margin: 0;
  max-width: 42rem;
  color: var(--mute);
}

.ledger {
  background: var(--sheet);
  border: 1px solid var(--ink);
  margin: 12px 0 48px;
}
.ledger caption {
  text-align: left;
  padding: 14px 18px 8px;
  font-weight: 700;
  caption-side: top;
}
.ledger a {
  display: grid;
  grid-template-columns: 8.5rem 1fr auto;
  gap: 12px;
  padding: 16px 18px;
  text-decoration: none;
  border-top: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
}
.ledger a:hover { background: #eef5f9; }
.ledger b { font-weight: 700; }
.ledger span { color: var(--mute); }
.ledger em {
  font-style: normal;
  font-weight: 700;
  color: var(--stamp);
}

.page-head {
  padding: 36px 0 20px;
}
.page-head h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
}
.page-head p {
  margin: 0;
  color: var(--mute);
  max-width: 42rem;
}

.stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 28px;
}
@media (max-width: 800px) {
  .stage { grid-template-columns: 1fr; }
  .ledger a { grid-template-columns: 1fr; }
}

.sheet {
  background: var(--sheet);
  border: 1px solid var(--ink);
  padding: 22px;
}
.sheet h2, .faq h2 {
  margin: 0 0 16px;
  font-size: 1.05rem;
}

label {
  display: block;
  margin: 0 0 14px;
  font-size: 0.92rem;
  font-weight: 600;
}
input, select {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  background: #fff;
  color: var(--ink);
  font: inherit;
}
.check {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  margin: 0 0 14px;
}
.check input { width: auto; margin: 0; }

button[type="submit"] {
  margin-top: 8px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: var(--ink);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button[type="submit"]:hover { background: var(--focus); }
button[type="submit"]:disabled {
  background: #8a99a6;
  cursor: not-allowed;
}

.result {
  min-height: 280px;
}
.result .big {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.1rem);
  letter-spacing: -0.04em;
  color: var(--stamp);
  font-variant-numeric: tabular-nums;
}
.result .label {
  margin: 0 0 8px;
  color: var(--mute);
  font-size: 0.9rem;
}
.rows {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
}
.rows li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  font-variant-numeric: tabular-nums;
}
.hint {
  margin: 16px 0 0;
  color: var(--mute);
  font-size: 0.88rem;
}
.empty {
  color: var(--mute);
}

.ad-slot {
  margin: 8px 0 36px;
  min-height: 120px;
  border: 1px dashed var(--rule);
  background: color-mix(in srgb, var(--sheet) 80%, #d7e3ec);
  padding: 18px;
  color: var(--mute);
  font-size: 0.88rem;
}

.faq {
  background: var(--sheet);
  border: 1px solid color-mix(in srgb, var(--ink) 35%, transparent);
  padding: 22px;
  margin-bottom: 36px;
}
.faq details {
  border-top: 1px solid color-mix(in srgb, var(--ink) 14%, transparent);
  padding: 12px 0;
}
.faq details:first-of-type { border-top: 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq p { margin: 8px 0 0; color: var(--mute); }
.faq a { color: var(--focus); }

.foot {
  border-top: 2px solid var(--ink);
  padding: 22px 0 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--mute);
  font-size: 0.88rem;
}
.foot a { color: var(--ink); }

.prose { max-width: 42rem; padding: 12px 0 48px; }
.prose h1 { font-size: 2rem; letter-spacing: -0.03em; }
.prose h2 { margin-top: 1.6em; }
.err { color: var(--stamp); margin: 8px 0 0; font-size: 0.9rem; }