:root {
  --ink: #1b1914;
  --navy: #1c2a3a;
  --sea: #2d4a62;
  --paper: #f3ead7;
  --sheet: #fffdf7;
  --rule: #d9c9a8;
  --cinnabar: #b23a2f;
  --pine: #2f5348;
  --gold: #b0893e;
  --muted: #5c5648;
  --warn: #f6e7c6;
  --err: #f3d4cc;
  --shadow: 0 18px 40px rgba(28, 42, 58, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(176, 137, 62, 0.12), transparent 50%),
    linear-gradient(180deg, #efe4c8 0%, var(--paper) 28%, #e7dcc4 100%);
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.65;
}

.skip {
  position: absolute;
  left: -999px;
}

.mast {
  background: var(--navy);
  color: #f6efe0;
  border-bottom: 4px solid var(--gold);
}

.mast-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.1rem 1.25rem 1.25rem;
}

.office {
  margin: 0;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  text-transform: none;
  color: #e4d3a2;
}

.wordmark {
  display: inline-block;
  margin: 0.15rem 0 0;
  color: inherit;
  text-decoration: none;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mast-note {
  margin: 0.25rem 0 0;
  color: #c9c0ad;
  font-size: 0.86rem;
}

.sister-nav {
  margin: 0.85rem 0 0;
}

.sister-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: #e4d3a2;
}

.sister-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sister-nav a {
  color: #f6efe0;
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 239, 224, 0.35);
  font-size: 0.9rem;
  font-weight: 600;
}

.sister-nav a:hover,
.sister-nav a:focus-visible {
  border-bottom-color: var(--gold);
  color: #fff8e8;
}

.sister-nav-footer {
  margin: 0 0 0.85rem;
}

.sister-nav-footer .sister-kicker {
  color: var(--gold);
}

.sister-nav-footer a {
  color: var(--navy);
  border-bottom-color: rgba(28, 42, 58, 0.28);
}

.sister-nav-footer a:hover,
.sister-nav-footer a:focus-visible {
  color: var(--sea);
  border-bottom-color: var(--gold);
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.hero {
  position: relative;
  margin-bottom: 1.5rem;
}

.hero h1,
.result-head h1 {
  margin: 0.2rem 0 0.8rem;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  line-height: 1.35;
  letter-spacing: -0.03em;
  color: var(--navy);
}

.lede,
.method {
  max-width: 40rem;
  color: var(--muted);
}

.seal {
  position: absolute;
  right: 0;
  top: -0.4rem;
  width: 4.2rem;
  height: 4.2rem;
  margin: 0;
  display: grid;
  place-items: center;
  border: 3px solid var(--cinnabar);
  border-radius: 50%;
  color: var(--cinnabar);
  font-weight: 800;
  letter-spacing: 0.12em;
  transform: rotate(-8deg);
  background: rgba(255, 253, 247, 0.7);
}

.sheet,
.rules,
.origin,
.card,
.result-head {
  background: var(--sheet);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
}

.sheet {
  padding: 1.25rem 1.25rem 1.4rem;
}

.sheet label {
  display: block;
  font-weight: 700;
  color: var(--navy);
}

.hint {
  margin: 0.25rem 0 0.7rem;
  color: var(--muted);
  font-size: 0.92rem;
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 16rem;
  padding: 0.9rem 1rem;
  border: 1px solid #cbb991;
  background: #fffaf0;
  color: var(--ink);
  font: inherit;
  line-height: 1.6;
}

textarea:focus {
  outline: 2px solid var(--sea);
  outline-offset: 2px;
}

.form-actions,
.share-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.62rem 1.15rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn.primary {
  background: var(--navy);
  color: #f7efe0;
}

.btn.ghost {
  background: transparent;
  border-color: #b9a57a;
  color: var(--navy);
}

.rules {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
}

.rules h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--cinnabar);
}

.rules ul,
.card ol {
  margin: 0;
  padding-left: 1.2rem;
}

.rules li + li,
.card li + li {
  margin-top: 0.35rem;
}

.banner {
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  margin: 0 0 1rem;
}

.banner.error {
  background: var(--err);
  color: #6a241c;
}

.banner.warn {
  background: var(--warn);
  color: #4a3a16;
}

.result-head {
  padding: 1.2rem 1.25rem 1.3rem;
  margin-bottom: 1rem;
}

.readonly-flag,
.kicker {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  font-weight: 700;
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.origin {
  padding: 1.1rem 1.25rem 1.25rem;
  margin: 1rem 0 1.4rem;
}

.origin h2,
.origin h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--sea);
}

.origin blockquote {
  margin: 0 0 1rem;
  padding: 0.8rem 0.9rem;
  background: #f7f0de;
  border-left: 4px solid var(--gold);
  white-space: pre-wrap;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.chips li {
  border: 1px solid #c9b27a;
  background: #fff8e6;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.86rem;
}

.deck {
  display: grid;
  gap: 1rem;
}

.card {
  padding: 1.15rem 1.2rem 1.2rem;
  position: relative;
}

.card[data-card="terms"] {
  border-top: 5px solid var(--navy);
}

.card[data-card="docs"] {
  border-top: 5px solid var(--pine);
}

.card[data-card="rights"] {
  border-top: 5px solid var(--cinnabar);
}

.card header {
  margin-bottom: 0.7rem;
}

.card .stamp {
  position: absolute;
  top: 1rem;
  right: 1rem;
  margin: 0;
  padding: 0.15rem 0.45rem;
  border: 2px solid var(--cinnabar);
  color: var(--cinnabar);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.card h2 {
  margin: 0.15rem 0 0.4rem;
  font-size: 1.28rem;
  color: var(--navy);
}

.card .lead,
.card footer,
.muted {
  color: var(--muted);
}

.card footer {
  margin-top: 0.85rem;
  font-size: 0.88rem;
}

.colophon {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

@media (min-width: 860px) {
  .deck {
    grid-template-columns: 1fr;
  }

  .card {
    padding-right: 7.5rem;
  }
}

@media (max-width: 640px) {
  .seal {
    position: static;
    margin-bottom: 0.8rem;
  }

  .card {
    padding-top: 2.6rem;
  }

  .form-actions,
  .share-row {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}