:root {
  --cinema-black: #151313;
  --cinema-red: #a51f2b;
  --cinema-red-dark: #761621;
  --paper: #f4efe4;
  --surface: #fffdf8;
  --surface-strong: #ebe3d4;
  --ink: #201d1b;
  --muted: #615a52;
  --line: #bdb3a4;
  --control: #13556a;
  --control-soft: #e0eef1;
  --hold: #8a3b11;
  --hold-soft: #fff2df;
  --good: #17603a;
  --risk: #8d1f2d;
  --radius: 3px;
  --reading: 72rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cinema-black);
  color: var(--ink);
  font-family: Pretendard, "Noto Sans KR", system-ui, sans-serif;
  line-height: 1.72;
}
a { color: var(--control); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid #1685a6;
  outline-offset: 3px;
}
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 50; background: #fff; color: #000; padding: .75rem 1rem; }

.site-header { background: var(--cinema-black); border-bottom: 1px solid #494241; }
.nav {
  max-width: var(--reading);
  margin: auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand { color: #fff8ed; font-weight: 900; text-decoration: none; letter-spacing: -.02em; }
.nav-links { display: flex; flex-wrap: wrap; gap: .65rem 1rem; font-size: .88rem; }
.nav-links a { color: #e0d7ce; }

main { max-width: var(--reading); margin: auto; background: var(--surface); border-inline: 1px solid #302b2a; }
.hero {
  color: #fff8ed;
  background: var(--cinema-black);
  border-top: 9px solid var(--cinema-red);
  border-bottom: 1px solid #4a4140;
  padding: clamp(2.6rem, 7vw, 5.5rem) clamp(1.25rem, 5vw, 4.5rem) 2.2rem;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(17rem, .75fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: end; }
.hero-tag { display: inline-block; border-block: 1px solid #8f7d78; padding: .38rem 0; color: #e5d8cf; font-size: .78rem; font-weight: 800; letter-spacing: .06em; }
.hero .eyebrow { color: #f18a93; }
.hero .lead { color: #ddd0c7; }
.hero-answer { background: #fffaf0; color: var(--ink); border: 1px solid #d9c9b8; border-top: 5px solid var(--cinema-red); padding: 1.15rem; }
.hero-answer strong { display: block; margin-bottom: .35rem; }

h1 { max-width: 16ch; margin: .65rem 0 1rem; font-size: clamp(2.05rem, 6vw, 4.35rem); line-height: 1.06; letter-spacing: -.052em; }
h2 { margin: 0 0 1rem; font-size: clamp(1.45rem, 3vw, 2.3rem); line-height: 1.2; letter-spacing: -.035em; }
h3 { margin: .25rem 0 .7rem; line-height: 1.35; }
.lead { max-width: 65ch; font-size: clamp(1.05rem, 2vw, 1.25rem); color: #3f3934; }
.eyebrow { margin: 0 0 .4rem; color: var(--cinema-red-dark); font-size: .76rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }

.state { margin: 1.5rem 0 0; padding: 1rem 1.1rem; border-left: 5px solid #e38b43; background: #352319; color: #ffe5c8; font-weight: 750; }
.disclosure { margin-top: 1rem; color: #d8cec7; }
.hero .disclosure a { color: #ffd4a8; }

.section { padding: clamp(2.6rem, 6vw, 4.6rem) clamp(1.25rem, 5vw, 4.5rem); border-bottom: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; border-bottom: 3px solid var(--cinema-black); padding-bottom: .85rem; margin-bottom: 1.25rem; }
.section-number { color: var(--cinema-red); font-size: .8rem; font-weight: 950; letter-spacing: .12em; }
.section-intro { max-width: 70ch; color: var(--muted); }

.ledger-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); }
.ledger-cell { padding: 1.2rem; border-right: 1px solid var(--line); background: var(--paper); }
.ledger-cell:last-child { border-right: 0; }
.ledger-cell span { display: block; color: var(--cinema-red-dark); font-size: .75rem; font-weight: 900; letter-spacing: .08em; }
.ledger-cell strong { display: block; margin: .35rem 0; font-size: 1.05rem; }

.account-grid, .scenario-grid, .decision-grid, .operator-grid { display: grid; gap: 1rem; }
.account-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.account-card { position: relative; border: 1px solid var(--line); border-top: 5px solid var(--cinema-black); padding: 1.25rem; background: #fff; }
.account-card::before { content: attr(data-ledger); display: block; margin-bottom: .8rem; color: var(--cinema-red-dark); font-size: .75rem; font-weight: 950; letter-spacing: .1em; }
.account-card dl { margin: 0; }
.account-card dt { margin-top: .75rem; font-size: .78rem; font-weight: 900; color: var(--muted); }
.account-card dd { margin: .15rem 0 0; }

.continuity-chain { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--line); background: var(--paper); }
.chain-step { min-height: 10rem; padding: 1.1rem; border-right: 1px solid var(--line); }
.chain-step:last-child { border-right: 0; }
.chain-step b { display: block; color: var(--cinema-red-dark); font-size: .75rem; letter-spacing: .08em; }
.chain-step strong { display: block; margin: .45rem 0; }

.decision-tool { border: 2px solid var(--cinema-black); background: var(--control-soft); padding: clamp(1.25rem, 4vw, 2.2rem); }
.decision-tool fieldset { margin: 1rem 0 0; padding: 0; border: 0; }
.decision-tool legend { font-weight: 900; }
.checklist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1.2rem; margin: .5rem 0 0; padding: 0; list-style: none; }
.checklist li { border-bottom: 1px solid #9cb8bf; }
.checklist label { display: grid; grid-template-columns: 1.25rem 1fr; gap: .7rem; align-items: start; padding: .85rem 0; cursor: pointer; }
.checklist input { width: 1.15rem; height: 1.15rem; margin: .25rem 0 0; accent-color: var(--control); }
.decision-rule { max-width: 70ch; font-size: 1.05rem; }
.decision-result { margin: 1.1rem 0 0; padding: .9rem 1rem; border-left: 4px solid var(--control); background: #fff; }

.path-list { counter-reset: path; margin: 0; padding: 0; list-style: none; }
.path-list li { counter-increment: path; display: grid; grid-template-columns: 3rem minmax(0, 1fr); gap: .75rem; padding: 1rem 0; border-top: 1px solid var(--line); }
.path-list li::before { content: counter(path, decimal-leading-zero); color: var(--cinema-red-dark); font-weight: 950; }
.path-list strong { display: block; }

.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem; background: #fff; }
.card strong { display: block; margin-bottom: .35rem; }
.yes { border-left: 5px solid var(--good); }
.no { border-left: 5px solid var(--risk); }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
.table-hint { margin: 0 0 .5rem; color: var(--muted); font-size: .86rem; }
table { width: 100%; min-width: 44rem; border-collapse: collapse; }
caption { padding: .8rem 1rem; text-align: left; color: var(--muted); font-size: .88rem; }
th, td { padding: .9rem 1rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--surface-strong); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }

.evidence-list { display: grid; gap: .85rem; }
.evidence { display: grid; grid-template-columns: minmax(9rem, .38fr) minmax(0, 1fr); gap: 1rem; border-top: 1px solid var(--line); padding-top: 1rem; }
.evidence strong { color: var(--cinema-red-dark); }
.evidence p { margin: 0; max-width: 72ch; }
.note { padding: 1rem; border: 1px solid var(--line); background: var(--paper); }
.source-mini { color: var(--muted); font-size: .92rem; }

.faq details { border-top: 1px solid var(--line); padding: 1.05rem 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 900; }
.faq p { max-width: 70ch; }

.subpage { min-height: 62vh; padding: clamp(2.3rem, 6vw, 4.6rem) clamp(1.25rem, 5vw, 4.5rem); border-top: 9px solid var(--cinema-red); }
.subpage h1 { max-width: 24ch; font-size: clamp(2rem, 5vw, 3.55rem); }
.subpage > h2 { margin-top: 2.5rem; padding-bottom: .55rem; border-bottom: 2px solid var(--cinema-black); }
.operator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.operator-grid dt { font-weight: 900; }
.operator-grid dd { margin: 0; color: var(--muted); word-break: break-word; }
.worksheet { border-left: 6px solid var(--control); padding: 1.2rem; background: var(--control-soft); }
.source-list li { margin-bottom: 1rem; word-break: break-word; }

footer { max-width: var(--reading); margin: auto; padding: 2rem 1.25rem; color: #d9d0c8; font-size: .87rem; }
footer a { color: #f4c6c8; }
.footer-links { display: flex; flex-wrap: wrap; gap: .6rem 1rem; margin-bottom: 1rem; }

@media (max-width: 900px) {
  .hero-grid, .account-grid, .continuity-chain { grid-template-columns: 1fr; }
  .ledger-strip { grid-template-columns: 1fr; }
  .ledger-cell, .chain-step { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .ledger-cell:last-child, .chain-step:last-child { border-bottom: 0; }
}

@media (max-width: 700px) {
  .nav { align-items: flex-start; flex-direction: column; }
  .card-grid, .decision-grid, .operator-grid, .checklist, .evidence { grid-template-columns: 1fr; }
  main { border-inline: 0; }
  .hero, .section, .subpage { padding-inline: 1.1rem; }
  h1 { max-width: none; }
  table { min-width: 39rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}