:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --ink: #1f2430;
  --ink-soft: #5b6472;
  --line: #e4e8ee;
  --accent: #3462ff;
  --accent-soft: #eef2ff;
  --ok-bg: #e3f6e8;
  --ok-ink: #1c7c39;
  --no-bg: #fdeae6;
  --no-ink: #c4381c;
  --warn-bg: #fff6dd;
  --warn-ink: #9a6b00;
  --radius: 10px;
  font-size: 15px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}
.muted { color: var(--ink-soft); font-size: 0.78rem; }

#layout {
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr) 216px;
  gap: 0;
  min-height: 100vh;
}

/* ── 좌측: 문서 목록 ─────────────────────────── */
#sidebar {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
#brand { display: flex; gap: 10px; align-items: center; margin-bottom: 14px; }
#brand .logo { font-size: 1.4rem; }
#search {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 14px;
  font-size: 0.88rem;
}
#search:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.nav-project { font-weight: 700; font-size: 0.8rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.04em; margin: 14px 6px 6px; }
.nav-group { font-size: 0.75rem; color: var(--ink-soft); margin: 8px 6px 2px; }
.nav-doc {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  padding: 7px 9px;
  border: 0;
  background: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--ink);
}
.nav-doc:hover { background: var(--bg); }
.nav-doc.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-doc .badge { flex: none; }

.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
  background: var(--bg);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.badge.PRD { background: #eef2ff; color: #3462ff; border-color: #d6e0ff; }
.badge.기능명세 { background: #e3f6e8; color: #1c7c39; border-color: #c4ebd0; }
.badge.유저플로우 { background: #fff1e3; color: #b05c00; border-color: #ffe0bd; }
.badge.화면 { background: #f3e8ff; color: #7a3bcc; border-color: #e5d3fa; }

/* ── 본문 ─────────────────────────────────── */
#main { padding: 34px 48px 90px; max-width: 980px; }
#doc-header { margin-bottom: 8px; }
#doc-badges { display: flex; gap: 6px; margin-bottom: 8px; }
#doc-title { font-size: 1.7rem; margin: 0 0 6px; letter-spacing: -0.01em; }

.markdown h1 { display: none; } /* 헤더에서 이미 표시 */
.markdown h2 {
  font-size: 1.22rem;
  margin: 42px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
  letter-spacing: -0.01em;
  scroll-margin-top: 20px;
}
.markdown h3 {
  font-size: 1.02rem;
  margin: 30px 0 10px;
  padding-left: 10px;
  border-left: 3px solid var(--accent);
  scroll-margin-top: 20px;
}
.markdown p { margin: 10px 0; }
.markdown li { margin: 4px 0; }
.markdown blockquote {
  margin: 14px 0;
  padding: 10px 16px;
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  color: var(--ink-soft);
}
.markdown blockquote p { margin: 4px 0; }
.markdown code {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 0.85em;
}
.markdown pre {
  background: #232733;
  color: #e8ecf4;
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
}
.markdown pre code { background: none; border: 0; color: inherit; }

/* 표 */
.markdown table {
  border-collapse: collapse;
  width: 100%;
  margin: 14px 0;
  background: var(--panel);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(20, 30, 60, 0.06);
  font-size: 0.88rem;
}
.markdown th {
  background: #f0f3f8;
  text-align: left;
  font-weight: 700;
  padding: 9px 12px;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}
.markdown td { padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.markdown tr:last-child td { border-bottom: 0; }

/* CRUD 매트릭스 셀 하이라이트 */
td.cell-ok { background: var(--ok-bg); color: var(--ok-ink); font-weight: 600; }
td.cell-no { background: var(--no-bg); color: var(--no-ink); }
td.cell-empty { background: var(--warn-bg); }
td.cell-empty::after { content: "⚠ 미정의"; color: var(--warn-ink); font-size: 0.78rem; font-weight: 700; }
table.crud-matrix th:first-child, table.crud-matrix td:first-child { font-weight: 700; }

/* Mermaid 다이어그램 */
.diagram {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin: 16px 0;
  overflow-x: auto;
  text-align: center;
  box-shadow: 0 1px 2px rgba(20, 30, 60, 0.06);
}
.diagram svg { max-width: 100%; height: auto; }
.diagram-error { border-color: var(--no-ink); background: var(--no-bg); text-align: left; font-size: 0.85rem; }

/* 와이어프레임 렌더 */
.wireframe {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
  box-shadow: 0 1px 2px rgba(20, 30, 60, 0.06);
}
.wireframe .wf-title { font-size: 0.78rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 12px; letter-spacing: 0.03em; }
.wf-row { display: flex; gap: 10px; margin-bottom: 10px; }
.wf-box {
  flex: 1;
  min-height: 52px;
  border: 1.5px dashed #aab4c4;
  border-radius: 8px;
  background: #fafbfd;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  font-size: 0.84rem;
  color: var(--ink-soft);
  text-align: center;
  position: relative;
}
.wf-box .wf-label {
  position: absolute;
  top: -9px;
  left: 10px;
  background: var(--panel);
  padding: 0 6px;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
}

/* ── 우측: 목차 ─────────────────────────────── */
#toc {
  border-left: 1px solid var(--line);
  padding: 26px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  font-size: 0.82rem;
}
.toc-label { font-weight: 700; color: var(--ink-soft); font-size: 0.72rem; letter-spacing: 0.05em; margin-bottom: 10px; }
#toc-nav a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 3px 8px;
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
}
#toc-nav a.lv3 { padding-left: 20px; font-size: 0.78rem; }
#toc-nav a:hover { color: var(--ink); background: var(--bg); }
#toc-nav a.active { color: var(--accent); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 600; }

mark { background: #ffe9a8; border-radius: 3px; padding: 0 2px; }

/* 인쇄(PDF 공유)용 */
@media print {
  #sidebar, #toc, #search { display: none; }
  #layout { grid-template-columns: 1fr; }
  #main { padding: 0; max-width: none; }
  .markdown pre { background: #f4f5f8; color: #222; }
}

@media (max-width: 1100px) {
  #layout { grid-template-columns: 232px minmax(0, 1fr); }
  #toc { display: none; }
}
@media (max-width: 760px) {
  #layout { grid-template-columns: 1fr; }
  #sidebar { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  #main { padding: 20px 18px 60px; }
}