:root { --accent: #01a982; --accent-soft: #eaf7f2; }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif; font-size: 15px; line-height: 1.7; color: #37352f; background: #fff; }
  .page { max-width: 900px; margin: 0 auto; padding: 80px 60px 120px; }
  .page-icon { font-size: 60px; margin-bottom: 12px; display: block; }
  .page-title { font-size: 36px; font-weight: 700; color: #1a1a1a; line-height: 1.25; margin-bottom: 24px; }
  .page-props { border-top: 1px solid #e8e8e8; border-bottom: 1px solid #e8e8e8; padding: 12px 0; margin-bottom: 32px; display: flex; flex-direction: column; gap: 6px; }
  .prop-row { display: flex; align-items: baseline; font-size: 14px; }
  .prop-label { color: #9b9a97; width: 120px; flex-shrink: 0; font-size: 13px; }
  .prop-value { color: #37352f; }
  .prop-tag { display: inline-block; background: #f1f0ef; color: #37352f; font-size: 12px; padding: 1px 8px; border-radius: 3px; margin-right: 4px; margin-bottom: 3px; }
  .ts-link { display: inline-block; font-size: 12px; font-family: "SF Mono","Menlo",monospace; color: var(--accent); background: var(--accent-soft); padding: 1px 7px; border-radius: 3px; text-decoration: none; margin-right: 6px; flex-shrink: 0; }
  .ts-link:hover { filter: brightness(0.96); }
  .callout { background: #f7f6f3; border-radius: 4px; padding: 14px 16px; display: flex; gap: 12px; margin-bottom: 16px; font-size: 14px; color: #37352f; line-height: 1.75; }
  .callout-blue { background: #f0f7ff; } .callout-yellow { background: #fef9e8; } .callout-green { background: #f2faec; }
  .callout-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
  hr { border: none; border-top: 1px solid #e8e8e8; margin: 28px 0; }
  h2 { font-size: 20px; font-weight: 600; color: #1a1a1a; margin-bottom: 12px; margin-top: 40px; }
  details { margin-bottom: 1px; }
  details > summary { display: flex; align-items: center; gap: 6px; cursor: pointer; list-style: none; padding: 4px 6px; border-radius: 4px; transition: background 0.12s; user-select: none; }
  details > summary::-webkit-details-marker { display: none; }
  details > summary::marker { display: none; }
  details > summary:hover { background: #edebe7; }
  details > summary:focus-visible { outline: 2px solid var(--a, var(--accent)); outline-offset: 1px; }
  .toggle-arrow { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; flex-shrink: 0; color: #9b9a97; font-size: 10px; transition: transform 0.18s cubic-bezier(0.34, 1.45, 0.64, 1), color 0.15s ease; }
  details[open] > summary .toggle-arrow { transform: rotate(90deg); }
  /* 호버 유도: 화살표 확대 + 좌우 흔들림 + '펼치기/접기' 안내 */
  @keyframes arrowNudge { 0%, 100% { transform: translateX(0) scale(1.35); } 50% { transform: translateX(4px) scale(1.35); } }
  @keyframes arrowNudgeOpen { 0%, 100% { transform: rotate(90deg) translateX(0) scale(1.35); } 50% { transform: rotate(90deg) translateX(4px) scale(1.35); } }
  details > summary:hover .toggle-arrow { color: var(--a, var(--accent)); animation: arrowNudge 0.75s ease-in-out infinite; }
  details[open] > summary:hover .toggle-arrow { animation: arrowNudgeOpen 0.75s ease-in-out infinite; }
  details:not([open]) > summary::after { content: '\D3BC\CE58\AE30'; margin-left: auto; padding-left: 12px; font-size: 11.5px; font-weight: 400; color: #9b9a97; opacity: 0; transition: opacity 0.15s ease; white-space: nowrap; }
  details[open] > summary::after { content: '\C811\AE30'; margin-left: auto; padding-left: 12px; font-size: 11.5px; font-weight: 400; color: #9b9a97; opacity: 0; transition: opacity 0.15s ease; white-space: nowrap; }
  details:not([open]) > summary:hover::after { opacity: 1; }
  details[open] > summary:hover::after { opacity: 1; }
  @media (max-width: 640px) { details > summary::after { display: none; } }
  @media (prefers-reduced-motion: reduce) {
    details > summary:hover .toggle-arrow { animation: none; transform: scale(1.35); }
    details[open] > summary:hover .toggle-arrow { animation: none; transform: rotate(90deg) scale(1.35); }
    .toggle-arrow { transition: none; }
  }
  .toggle-content { padding-left: 26px; padding-top: 2px; }
  .depth1 > summary { font-size: 16px; font-weight: 600; color: #1a1a1a; padding: 6px 8px; }
  .depth1 > .toggle-content { padding-left: 24px; }
  .depth2 > summary { font-size: 14px; font-weight: 500; color: #37352f; padding: 4px 8px; }
  .depth2 > .toggle-content { padding-left: 22px; padding-top: 4px; }
  .depth3 > summary { font-size: 13px; font-weight: 500; color: #555; padding: 3px 8px; }
  .depth3 > .toggle-content { padding-left: 20px; padding-top: 4px; }
  .depth4-content { padding-left: 4px; padding-top: 4px; padding-bottom: 4px; }
  .tl-item { display: flex; gap: 10px; align-items: flex-start; padding: 9px 0; border-bottom: 1px solid #f1f0ef; font-size: 14px; line-height: 1.75; color: #37352f; }
  .tl-item:last-child { border-bottom: none; }
  .tl-body { flex: 1; }
  .tl-body p { margin-bottom: 6px; } .tl-body p:last-child { margin-bottom: 0; }
  .inline-box { background: #f7f6f3; border-left: 3px solid #d3d0ca; border-radius: 0 4px 4px 0; padding: 10px 14px; margin: 8px 0; font-size: 13px; line-height: 1.75; color: #555; }
  .inline-box.blue { background: #f0f7ff; border-color: #8bbce8; }
  .inline-box.green { background: #f2faec; border-color: #a4cf6a; }
  .inline-box.orange { background: #fff8f0; border-color: #f0a060; }
  .inline-box.red { background: #fff5f5; border-color: #e88080; }
  .notion-list { list-style: none; padding: 0; margin: 6px 0; }
  .notion-list li { display: block; position: relative; padding: 2px 0 2px 20px; font-size: 14px; color: #37352f; line-height: 1.7; }
  .notion-list li::before { content: '•'; color: #9b9a97; font-size: 16px; line-height: 1.7; position: absolute; left: 2px; top: 2px; }
  .num-list { list-style: none; counter-reset: num; padding: 0; margin: 6px 0; }
  .num-list li { counter-increment: num; display: flex; gap: 8px; align-items: flex-start; padding: 2px 0; font-size: 14px; color: #37352f; line-height: 1.7; }
  .num-list li::before { content: counter(num) '.'; color: #9b9a97; font-size: 13px; line-height: 1.7; flex-shrink: 0; width: 18px; }
  .stat-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 10px 0; }
  .stat-card { background: #f7f6f3; border: 1px solid #e8e8e8; border-radius: 4px; padding: 10px 16px; text-align: center; min-width: 90px; }
  .stat-num { font-size: 22px; font-weight: 700; color: var(--accent); display: block; }
  .stat-lbl { font-size: 11px; color: #9b9a97; line-height: 1.4; }
  .flow-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
  .flow-pill { background: #f1f0ef; border: 1px solid #e0ded9; border-radius: 3px; padding: 4px 12px; font-size: 13px; color: #37352f; white-space: nowrap; }
  .flow-pill.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }
  .flow-arrow { color: #c0bdb8; font-size: 16px; }
  .result-bar-wrap { margin: 10px 0; }
  .result-bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; font-size: 13px; }
  .result-bar-label { width: 110px; color: #9b9a97; flex-shrink: 0; }
  .result-bar-bg { flex: 1; background: #f1f0ef; border-radius: 3px; height: 10px; overflow: hidden; }
  .result-bar-fill { height: 100%; border-radius: 3px; background: var(--accent); }
  .result-bar-val { width: 130px; color: #37352f; font-weight: 600; flex-shrink: 0; font-size: 12px; }
  strong { font-weight: 600; }
  code { font-family: "SF Mono","Menlo",monospace; font-size: 12px; background: #f1f0ef; padding: 1px 5px; border-radius: 3px; color: #c0392b; }
  table { border-collapse: collapse; width: 100%; margin: 10px 0; font-size: 13px; }
  th, td { border: 1px solid #e8e8e8; padding: 7px 10px; text-align: left; vertical-align: top; }
  th { background: #f7f6f3; font-weight: 600; color: #37352f; }
  .slide { margin: 12px 0; }
  .slide img { width: 100%; border: 1px solid #e8e8e8; border-radius: 4px; display: block; }
  .slide figcaption { font-size: 12px; color: #9b9a97; margin-top: 5px; }
  .sess-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; }
  .sess-nav a { font-size: 13px; text-decoration: none; color: #37352f; background: #f1f0ef; border-radius: 4px; padding: 6px 12px; }
  .sess-nav a:hover { background: var(--accent-soft); color: var(--accent); }
  @media (max-width: 640px) { .page { padding: 40px 20px 80px; } .page-title { font-size: 26px; } .prop-label { width: 90px; } }

/* ===== 사이트 크롬 ===== */
:root{ --bg:#fbfbfa; --line:#e8e8e8; }
body{ background:var(--bg); }
.topbar{ position:sticky; top:0; z-index:50; background:rgba(255,255,255,.92); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line); }
.topbar-in{ max-width:1080px; margin:0 auto; padding:14px 24px; display:flex; align-items:center; gap:14px; }
.brand{ font-size:15px; font-weight:700; color:#111; text-decoration:none; letter-spacing:-.2px; }
.brand small{ display:block; font-size:11px; font-weight:500; color:#9b9a97; letter-spacing:.5px; margin-top:1px; }
.topbar .spacer{ flex:1; }
.topbar a.back{ font-size:13px; color:#37352f; text-decoration:none; background:#f1f0ef; padding:6px 12px; border-radius:5px; }
.topbar a.back:hover{ background:var(--accent-soft); color:var(--accent); }
.wrap{ max-width:1080px; margin:0 auto; padding:36px 24px 100px; }
.page{ max-width:none; margin:0; padding:0; }

.hero h1{ font-size:30px; font-weight:800; color:#111; letter-spacing:-.5px; margin-bottom:8px; }
.hero p{ font-size:14px; color:#6b6a67; }
.filters{ display:flex; flex-wrap:wrap; gap:8px; margin:22px 0 18px; }
.filters input{ flex:1; min-width:200px; border:1px solid var(--line); border-radius:6px; padding:9px 13px; font-size:14px;
  font-family:inherit; background:#fff; }
.filters input:focus{ outline:none; border-color:var(--accent); }
.chip{ font-size:12px; border:1px solid var(--line); background:#fff; border-radius:20px; padding:6px 13px; cursor:pointer; color:#37352f; }
.chip.on{ background:var(--accent); border-color:var(--accent); color:#fff; }

.grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(320px,1fr)); gap:16px; }
.tcard{ background:#fff; border:1px solid var(--line); border-radius:10px; overflow:hidden; text-decoration:none;
  color:inherit; display:flex; flex-direction:column; transition:.15s; }
.tcard:hover{ border-color:var(--accent); box-shadow:0 4px 14px rgba(0,0,0,.06); transform:translateY(-2px); }
.tcard .thumb{ aspect-ratio:16/10; background:#eee center/cover; }
.tcard .body{ padding:16px 18px 18px; }
.tcard .date{ font-size:11px; color:var(--accent); font-weight:700; letter-spacing:.6px; }
.tcard h3{ font-size:16px; font-weight:700; margin:5px 0 7px; color:#111; line-height:1.4; }
.tcard .sum{ font-size:13px; color:#6b6a67; line-height:1.65; }
.tcard .meta{ margin-top:12px; padding-top:11px; border-top:1px solid #f1f0ef; font-size:11px; color:#9b9a97;
  display:flex; gap:10px; flex-wrap:wrap; }

.dhead{ background:#fff; border:1px solid var(--line); border-radius:10px; padding:26px 28px; margin-bottom:22px; }
.dhead .date{ font-size:12px; color:var(--accent); font-weight:700; letter-spacing:.6px; }
.dhead h1{ font-size:26px; font-weight:800; color:#111; margin:6px 0 14px; line-height:1.3; letter-spacing:-.4px; }
.dmeta{ display:flex; flex-wrap:wrap; gap:6px 22px; font-size:13px; color:#6b6a67; }
.dmeta b{ color:#37352f; }
.statrow{ display:flex; gap:10px; margin-top:16px; flex-wrap:wrap; }
.stat{ background:#f7f6f3; border-radius:7px; padding:9px 15px; }
.stat b{ display:block; font-size:17px; color:var(--accent); }
.stat span{ font-size:11px; color:#9b9a97; }

.tabs{ display:flex; gap:6px; flex-wrap:wrap; margin-bottom:20px; position:sticky; top:57px; z-index:40;
  background:var(--bg); padding:12px 0; }
.tab{ font-size:13px; border:1px solid var(--line); background:#fff; border-radius:7px; padding:9px 15px;
  cursor:pointer; color:#37352f; text-decoration:none; }
.tab:hover{ border-color:var(--accent); color:var(--accent); }
.tab.on{ background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600; }

.panel{ background:#fff; border:1px solid var(--line); border-radius:10px; padding:28px 30px; }
.panel h2{ margin-top:34px; }
.panel h2:first-child{ margin-top:0; }
.shead{ border-bottom:1px solid var(--line); padding-bottom:16px; margin-bottom:8px; }
.shead h2{ font-size:21px; margin:0 0 8px; }
.shead .sp{ font-size:13px; color:#6b6a67; }

.gal{ display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:14px; margin-top:14px; }
.gal figure{ border:1px solid var(--line); border-radius:8px; overflow:hidden; background:#fff; cursor:zoom-in; }
.gal img{ width:100%; display:block; aspect-ratio:4/3; object-fit:contain; background:#141414; }
.gal figcaption{ padding:9px 11px; font-size:12px; line-height:1.55; color:#37352f; }
.gal .gt{ font-family:"SF Mono",Menlo,monospace; font-size:11px; color:var(--accent); display:block; margin-bottom:3px; }

.lb{ position:fixed; inset:0; background:rgba(15,15,15,.94); z-index:200; display:none; align-items:center;
  justify-content:center; flex-direction:column; padding:24px; }
.lb.on{ display:flex; }
.lb img{ max-width:96vw; max-height:80vh; border-radius:6px; }
.lb .cap{ color:#eaeaea; font-size:14px; margin-top:16px; max-width:820px; text-align:center; line-height:1.7; }
.lb .nav{ position:absolute; top:50%; transform:translateY(-50%); font-size:34px; color:#fff; opacity:.55;
  cursor:pointer; padding:20px; user-select:none; }
.lb .nav:hover{ opacity:1; }
.lb .prev{ left:6px; } .lb .next{ right:6px; }
.lb .close{ position:absolute; top:16px; right:22px; color:#fff; font-size:28px; opacity:.6; cursor:pointer; }
.lb .idx{ position:absolute; top:22px; left:24px; color:#bbb; font-size:13px; }

.ts-link{ cursor:default; }
.empty{ text-align:center; padding:70px 0; color:#9b9a97; font-size:14px; }
footer{ margin-top:44px; padding-top:22px; border-top:1px solid var(--line); font-size:12px; color:#9b9a97; line-height:1.8; }
@media (max-width:640px){
  .wrap{ padding:24px 16px 70px; } .panel{ padding:20px 18px; } .dhead{ padding:20px 18px; }
  .hero h1{ font-size:24px; } .dhead h1{ font-size:21px; } .tabs{ top:53px; }
}

/* ---- v2: 문서형 교육 · 썸네일 없는 카드 · 액션 버튼 ---- */
.callout-orange { background: #fff5eb; }
.callout-red    { background: #fdf0ef; }
.thumb.noimg { display:flex; align-items:center; justify-content:center; text-align:center;
  background: linear-gradient(135deg, var(--a) 0%, #1a2332 130%); }
.thumb.noimg span { color:#fff; font-size:17px; font-weight:700; letter-spacing:-.2px;
  padding:0 18px; line-height:1.35; text-shadow:0 1px 3px rgba(0,0,0,.25); }
.shead .ssub { font-size:15px; color:#6b7280; margin-top:2px; }
.btn-video, .btn-doc { display:inline-block; margin:4px 8px 14px 0; padding:9px 16px; border-radius:6px;
  font-size:14px; font-weight:600; text-decoration:none; border:1px solid #e2e2e0; color:#37352f;
  background:#fff; transition:background .15s,border-color .15s; }
.btn-video:hover, .btn-doc:hover { background:#f7f6f3; border-color:#d0cfcb; }
.btn-video { color:#c4302b; border-color:#f0d5d4; }
.btn-doc { color:#1a5fa8; border-color:#d5e3f2; }

/* ---- 200자 요약 블록 ---- */
.sum200 { background:#f8f9fa; border-left:3px solid var(--a,#01a982); border-radius:0 8px 8px 0;
  padding:16px 20px; font-size:16px; line-height:1.8; color:#2b3440; }
.sum200 b, .sum200 strong { color:#111; }
.sum200-k { display:block; font-size:11.5px; font-weight:700; letter-spacing:.09em;
  color:var(--a,#01a982); margin-bottom:7px; }
.dhead .sum200 { font-size:16.5px; }
/* 태그 필터가 길어질 때 */
.filters { flex-wrap:wrap; }
.gt-link { color: var(--a,#01a982); text-decoration:none; }
.gt-link:hover { text-decoration:underline; }

/* ---- 핵심 장면 텍스트 카드 ---- */
.kpgrid { display:grid; grid-template-columns:repeat(auto-fill,minmax(268px,1fr)); gap:12px; margin:14px 0 8px; }
.kpcard { position:relative; background:#fff; border:1px solid #e8e8e6; border-radius:10px;
  padding:16px 16px 15px 18px; overflow:hidden; transition:border-color .15s, box-shadow .15s; }
.kpcard::before { content:''; position:absolute; left:0; top:0; bottom:0; width:3px; background:var(--a,#01a982); }
.kpcard:hover { border-color:#d6d6d2; box-shadow:0 2px 10px rgba(0,0,0,.05); }
.kpnum { position:absolute; right:12px; top:9px; font-size:22px; font-weight:800; color:#f0efec; letter-spacing:-1px; }
.kpt { display:inline-block; font-size:11.5px; font-weight:700; letter-spacing:.02em; color:var(--a,#01a982);
  background:color-mix(in srgb, var(--a,#01a982) 9%, #fff); border-radius:4px; padding:2px 7px;
  text-decoration:none; margin-bottom:8px; position:relative; z-index:1; }
a.kpt:hover { text-decoration:underline; }
.kph { font-size:14.5px; font-weight:650; line-height:1.5; color:#1f2937; position:relative; z-index:1; }
.kpd { font-size:13px; line-height:1.65; color:#6b7280; margin-top:6px; position:relative; z-index:1; }