:root {
  --paper: #eee6d9;
  --ink: #282724;
  --ink-soft: #68625a;
  --line: rgba(48, 44, 39, .18);
  --line-strong: rgba(48, 44, 39, .42);
  --accent: #765c3f;
  --header-h: 68px;
}

* { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 24px); }
body { margin: 0; min-width: 280px; color: var(--ink); background-color: var(--paper); background-image: radial-gradient(circle at 18% 8%, rgba(255,255,255,.36), transparent 38%), radial-gradient(circle at 86% 26%, rgba(137,105,72,.06), transparent 34%), repeating-linear-gradient(7deg, rgba(86,67,47,.024) 0 1px, transparent 1px 5px); font-family: "Noto Sans KR", "Malgun Gothic", sans-serif; line-height: 1.78; word-break: keep-all; }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.viewer-progress { position: fixed; inset: 0 0 auto; z-index: 30; height: 2px; background: rgba(40,39,36,.08); }
.viewer-progress i { display: block; width: 100%; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }
.viewer-header { position: sticky; top: 0; z-index: 20; height: var(--header-h); padding: 0 max(24px, env(safe-area-inset-left)); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid var(--line); background: rgba(238,230,217,.91); backdrop-filter: blur(14px); }
.viewer-back { justify-self: start; display: inline-flex; gap: 8px; align-items: center; font-family: Georgia, "Times New Roman", serif; font-size: 17px; text-decoration: none; }
.viewer-header-title { grid-column: 2; margin: 0; color: var(--ink-soft); font-size: 10px; font-weight: 600; letter-spacing: .18em; }

.viewer-shell { width: min(1320px, calc(100% - 64px)); margin: 0 auto; display: grid; grid-template-columns: 220px minmax(0, 960px); justify-content: center; gap: clamp(50px, 7vw, 100px); }
.viewer-toc { position: sticky; top: calc(var(--header-h) + 38px); align-self: start; max-height: calc(100vh - var(--header-h) - 76px); margin-top: 120px; overflow: auto; scrollbar-width: thin; }
.viewer-toc > p { margin: 0 0 24px; padding-bottom: 12px; border-bottom: 1px solid var(--line-strong); font-size: 9px; font-weight: 700; letter-spacing: .2em; }
.viewer-toc nav { display: grid; gap: 2px; }
.viewer-toc a { padding: 7px 0; color: var(--ink-soft); font-size: 11px; line-height: 1.45; text-decoration: none; transition: color .18s ease, transform .18s ease; }
.viewer-toc a:hover { color: var(--ink); transform: translateX(2px); }
.viewer-toc .toc-depth-3 { padding-left: 14px; font-size: 10px; opacity: .78; }

.viewer-main { min-width: 0; padding: clamp(78px, 9vw, 128px) 0 140px; }
.document-cover { margin-bottom: clamp(70px, 9vw, 110px); padding-bottom: 34px; border-bottom: 1px solid var(--line-strong); }
.document-cover > p { margin: 0 0 18px; color: var(--ink-soft); font-size: 10px; font-weight: 700; letter-spacing: .2em; }
.document-cover h1 { margin: 0; font-family: "Noto Serif KR", Batang, Georgia, serif; font-size: clamp(42px, 6vw, 74px); font-weight: 400; line-height: 1.15; letter-spacing: -.045em; }
.document-meta { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 10px 20px; color: var(--ink-soft); font-size: 9px; font-weight: 600; letter-spacing: .12em; }
.document-meta span + span::before { content: "/"; margin-right: 20px; opacity: .35; }

.viewer-state { min-height: 46vh; display: grid; place-content: center; justify-items: center; color: var(--ink-soft); text-align: center; }
.viewer-state[hidden] { display: none; }
.viewer-loading-mark { width: 34px; height: 34px; border: 1px solid var(--line-strong); border-top-color: transparent; border-radius: 50%; animation: loading 1s linear infinite; }
.viewer-state p { margin: 16px 0 0; font-size: 13px; }
.viewer-error h2 { margin: 0; font-family: "Noto Serif KR", Batang, serif; font-size: 28px; font-weight: 400; }
.viewer-error a { margin-top: 28px; font-size: 12px; font-weight: 600; text-underline-offset: 5px; }
@keyframes loading { to { transform: rotate(360deg); } }

.markdown-document { font-size: 16px; }
.markdown-document[hidden] { display: none; }
.markdown-document > h1:first-child { display: none; }
.markdown-document h2, .markdown-document h3, .markdown-document h4 { font-family: "Noto Serif KR", Batang, Georgia, serif; font-weight: 500; line-height: 1.35; }
.markdown-document h2 { margin: 100px 0 34px; padding: 0 0 17px; border-bottom: 1px solid var(--line-strong); font-size: clamp(29px, 3.7vw, 42px); letter-spacing: -.035em; }
.markdown-document h3 { margin: 64px 0 25px; font-size: clamp(22px, 2.8vw, 30px); letter-spacing: -.025em; }
.markdown-document h4 { margin: 45px 0 18px; font-size: 19px; }
.markdown-document p { margin: 0 0 1.45em; color: #3d3934; }
.markdown-document strong { color: var(--ink); font-weight: 700; }
.markdown-document ul, .markdown-document ol { margin: 0 0 1.6em; padding-left: 1.5em; }
.markdown-document li { margin: .34em 0; padding-left: .24em; }
.markdown-document hr { margin: 72px 0; border: 0; border-top: 1px solid var(--line); }
.markdown-document blockquote { margin: 30px 0; padding: 8px 0 8px 24px; border-left: 2px solid rgba(61,55,48,.48); color: var(--ink-soft); }
.markdown-document blockquote p:last-child { margin-bottom: 0; }
.markdown-document a { color: #654b30; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.markdown-document code { padding: .12em .38em; border: 1px solid rgba(52,60,61,.12); border-radius: 3px; color: #344247; background: rgba(73,88,91,.07); font-family: Consolas, "SFMono-Regular", monospace; font-size: .88em; word-break: normal; }
.markdown-document pre { margin: 28px 0 34px; padding: 22px 24px; overflow: auto; border: 1px solid rgba(52,60,61,.17); background: rgba(70,79,80,.075); line-height: 1.65; scrollbar-width: thin; }
.markdown-document pre code { padding: 0; border: 0; background: transparent; font-size: 13px; white-space: pre; }
.table-scroll { width: 100%; margin: 30px 0 42px; overflow-x: auto; border-block: 1px solid var(--line-strong); scrollbar-width: thin; }
.table-scroll:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.markdown-document table { width: 100%; min-width: 680px; border-collapse: collapse; color: #3c3935; font-size: 13px; line-height: 1.55; }
.markdown-document th, .markdown-document td { padding: 13px 14px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.markdown-document th:last-child, .markdown-document td:last-child { border-right: 0; }
.markdown-document tr:last-child td { border-bottom: 0; }
.markdown-document thead th { color: #eee9df; background: rgba(44,48,48,.86); font-weight: 600; }
.markdown-document tbody tr:nth-child(even) { background: rgba(255,255,255,.12); }
.document-end-link { display: inline-block; margin-top: 110px; padding-top: 18px; border-top: 1px solid var(--line-strong); color: var(--ink-soft); font-family: Georgia, "Times New Roman", serif; font-size: 16px; text-decoration: none; }

@media (max-width: 1050px) {
  .viewer-shell { width: min(960px, calc(100% - 48px)); display: block; }
  .viewer-toc { display: none; }
}

@media (max-width: 620px) {
  :root { --header-h: 58px; }
  body { word-break: normal; }
  .viewer-header { padding-inline: 20px; grid-template-columns: auto 1fr; }
  .viewer-back { font-size: 16px; }
  .viewer-header-title { justify-self: end; max-width: 55vw; overflow: hidden; font-size: 8px; text-overflow: ellipsis; white-space: nowrap; }
  .viewer-shell { width: 100%; }
  .viewer-main { padding: 58px 20px 100px; }
  .document-cover { margin-bottom: 62px; padding-bottom: 24px; }
  .document-cover h1 { font-size: 39px; }
  .document-meta { display: grid; gap: 6px; }
  .document-meta span + span::before { display: none; }
  .markdown-document { font-size: 15px; line-height: 1.76; }
  .markdown-document h2 { margin-top: 76px; font-size: 30px; }
  .markdown-document h3 { margin-top: 50px; font-size: 23px; }
  .markdown-document hr { margin: 55px 0; }
  .markdown-document blockquote { padding-left: 17px; }
  .markdown-document pre { margin-inline: -4px; padding: 18px; }
  .table-scroll { width: calc(100% + 20px); margin-right: -20px; }
  .markdown-document table { min-width: 640px; font-size: 12px; }
  .markdown-document th, .markdown-document td { padding: 11px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .viewer-loading-mark { animation: none; }
}