:root{
    --bg:#f5f6f8; --surface:#ffffff; --ink:#1b1d24; --muted:#666d78;
    --line:#e6e8ec; --line-soft:#eef0f3; --accent:#b20088; --accent-soft:#fbe7f5;
    --app:#ffffff; --app2:#f0f1f3; --app-line:#e6e8ec; --app-ink:#1b1d24; --app-muted:#767c86;
    --hl:#ff3358; --hl-soft:rgba(255,51,88,.12); --pink:#b20088;
    --radius:14px;
    color-scheme:light;
  }
  @media (prefers-color-scheme:dark){
    :root{ --bg:#0f1015; --surface:#181a20; --ink:#eceef2; --muted:#9aa1ad;
      --line:#282b33; --line-soft:#20222a; --accent:#f472c8; --accent-soft:#331329;
      color-scheme:dark; }
  }
  :root[data-theme="light"]{ --bg:#f5f6f8; --surface:#ffffff; --ink:#1b1d24; --muted:#666d78;
    --line:#e6e8ec; --line-soft:#eef0f3; --accent:#b20088; --accent-soft:#fbe7f5;
    color-scheme:light; }
  :root[data-theme="dark"]{ --bg:#0f1015; --surface:#181a20; --ink:#eceef2; --muted:#9aa1ad;
    --line:#282b33; --line-soft:#20222a; --accent:#f472c8; --accent-soft:#331329;
    color-scheme:dark; }

  *{box-sizing:border-box}
  body{margin:0}
  .base{
    font-family:"Pretendard","Apple SD Gothic Neo","Malgun Gothic",-apple-system,BlinkMacSystemFont,system-ui,"Segoe UI",Roboto,sans-serif;
    background:var(--bg); color:var(--ink); min-height:100vh; line-height:1.62; letter-spacing:-.01em;
    -webkit-font-smoothing:antialiased;
  }

  /* ── layout: nav + article + page toc ── */
  .page{max-width:1320px; margin:0 auto; display:grid; grid-template-columns:230px minmax(0,1fr) 200px; gap:48px; padding:0 24px}
  .toc,.page-nav{position:sticky; top:0; align-self:start; height:100vh; padding:40px 0; overflow-y:auto;
    scrollbar-width:thin; scrollbar-color:transparent transparent}
  .toc:hover,.page-nav:hover{scrollbar-color:var(--line) transparent}
  .toc::-webkit-scrollbar,.page-nav::-webkit-scrollbar{width:6px}
  .toc::-webkit-scrollbar-track,.page-nav::-webkit-scrollbar-track{background:transparent}
  .toc::-webkit-scrollbar-thumb,.page-nav::-webkit-scrollbar-thumb{background:transparent;border-radius:999px}
  .toc:hover::-webkit-scrollbar-thumb,.page-nav:hover::-webkit-scrollbar-thumb{background:var(--line)}
  .toc::-webkit-scrollbar-thumb:hover,.page-nav::-webkit-scrollbar-thumb:hover{background:var(--muted)}
  .toc .tb{display:flex;align-items:center;gap:9px;margin-bottom:20px}
  .toc .logo{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,#e857b0,#b20088);display:grid;place-items:center;color:#fff;font-weight:800;font-size:13px}
  .toc .tb b{font-size:14px;font-weight:750}
  .toc .tb .theme-toggle{margin-left:auto}
  .toc .cap,.page-nav .cap{font-size:10.5px;font-weight:800;letter-spacing:.11em;text-transform:uppercase;color:var(--muted);margin:18px 0 7px 10px}
  .toc .cap:first-of-type,.page-nav .cap:first-of-type{margin-top:0}
  .toc nav,.page-nav nav{display:flex;flex-direction:column;gap:1px}
  .toc a,.page-nav a{display:block;text-decoration:none;color:var(--muted);font-size:13px;padding:6px 10px;border-radius:8px}
  .toc a:hover,.page-nav a:hover{background:var(--line-soft);color:var(--ink)}
  .toc a.on,.page-nav a.on{color:var(--accent);background:var(--accent-soft);font-weight:650}
  /* 왼쪽 대메뉴 — 툴 하위(개별 툴) 페이지는 한 단계 들여쓰기 */
  .guide-nav a.navlv1{padding-left:24px;font-size:12.5px}
  /* 우측 "이 페이지" 목차 위계 — 첫 항목은 제목, 나머지는 한 단계씩 들여쓰기 */
  .page-nav a.lv0{color:var(--ink);font-weight:750}
  .page-nav a.lv1{padding-left:24px}
  .page-nav a.lv2{padding-left:38px}
  /* 우측 "이 페이지" 목차는 본문 상단에 맞춰 살짝 내려 정렬 */
  .page-nav{padding-top:52px}
  .theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:32px;padding:5px 9px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--muted);font:inherit;font-size:12px;font-weight:700;cursor:pointer}
  .theme-toggle:hover{color:var(--ink);background:var(--line-soft)}
  .theme-toggle svg{width:15px;height:15px;display:block}
  .theme-toggle .moon{display:none}
  :root[data-theme="dark"] .theme-toggle .sun{display:none}
  :root[data-theme="dark"] .theme-toggle .moon{display:block}
  @media (prefers-color-scheme:dark){
    :root:not([data-theme]) .theme-toggle .sun{display:none}
    :root:not([data-theme]) .theme-toggle .moon{display:block}
  }

  .col{min-width:0; padding:52px 0 96px; max-width:815px}

  /* mobile top nav */
  .topnav{display:none}

  /* ── hero ── */
  .eyebrow{font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--accent);margin:0 0 12px}
  h1{font-size:clamp(27px,4.4vw,38px);line-height:1.18;font-weight:800;margin:0 0 14px;text-wrap:balance;letter-spacing:-.025em}
  .lede{font-size:16.5px;color:var(--muted);margin:0;max-width:60ch}
  .lede b{color:var(--ink);font-weight:700}
  .meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
  .chip{font-size:12.5px;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 12px}
  .chip b{color:var(--accent);font-weight:700}
  hr.rule{border:0;border-top:1px solid var(--line);margin:40px 0}

  /* ── category header ── */
  .cat{display:flex;align-items:center;gap:13px;margin:0 0 8px;scroll-margin-top:20px}
  .cat .cn{display:none}
  .cat h2{font-size:23px;font-weight:800;margin:0;letter-spacing:-.025em}
  .catlede{color:var(--muted);font-size:15px;margin:0 0 24px;padding-left:0}

  /* 본문 하위 항목 */
  section.sub{margin:68px 0 26px;scroll-margin-top:20px}
  section.sub:first-of-type{margin-top:12px}
  .sub h3{font-size:23px;font-weight:800;margin:0 0 10px;letter-spacing:-.025em;display:flex;align-items:center;gap:8px}
  .sub h3 .ic{font-size:17px}
  .sub p{margin:0 0 14px;color:var(--muted);font-size:14.5px}
  .sub p b{color:var(--ink);font-weight:700}
  .k{display:inline-block;background:var(--accent-soft);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent);border-radius:7px;padding:1px 8px;font-weight:700;font-size:13px}
  .kbd{display:inline-block;background:var(--surface);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:0 7px;font-size:12.5px;font-weight:700;color:var(--ink);font-family:inherit}

  /* ── shortcut table ── */
  .kglabel{font-size:12.5px;font-weight:750;color:var(--ink);margin:32px 0 8px}
  .kglabel:first-of-type{margin-top:2px}
  .keys{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
  .keys .kr{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:10px 15px;border-top:1px solid var(--line-soft)}
  .keys .kr:first-child{border-top:0}
  .keys .ka{font-size:14px;color:var(--ink)}
  .keys .ka b{color:var(--ink);font-weight:700}
  .keys .kc{flex:none;display:flex;gap:5px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
  .keys .kc .sep{color:var(--muted);font-size:12px}
  .keys .kc .plain{color:var(--muted);font-size:13px}

  /* numbered step chips inside a flow */
  .step{position:relative;padding-left:52px;margin:0 0 30px;scroll-margin-top:20px}
  .num{position:absolute;left:0;top:1px;width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;font-weight:800;font-size:15px;display:grid;place-items:center;box-shadow:0 4px 12px color-mix(in srgb,var(--accent) 38%,transparent)}
  .step h3{font-size:17px;font-weight:750;margin:3px 0 8px;letter-spacing:-.02em}
  .step p{margin:0 0 14px;color:var(--muted);font-size:14.5px}
  .step p b{color:var(--ink);font-weight:700}
  .step::before{content:"";position:absolute;left:16px;top:42px;bottom:-30px;width:2px;background:var(--line)}
  .step.last::before{display:none}

  /* ── feature list rows ── */
  .flist{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface);margin:2px 0 6px}
  .flist .row{display:flex;gap:12px;padding:13px 15px;border-top:1px solid var(--line-soft)}
  .flist .row:first-child{border-top:0}
  .flist .ic{font-size:16px;flex:none;width:22px;text-align:center;line-height:1.5}
  .flist .tx{min-width:0}
  .flist .tt{font-size:14px;font-weight:700;color:var(--ink);margin:0 0 2px}
  .flist .dd{font-size:13.5px;color:var(--muted);margin:0}
  .flist .dd b{color:var(--ink);font-weight:650}

  .note{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:13px 16px;font-size:13.5px;color:var(--muted);margin:14px 0}
  .note b{color:var(--ink)}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .guide-loading,.guide-error{min-height:46vh;display:grid;place-items:center;text-align:center;color:var(--muted)}
  .guide-skeleton{width:min(100%,640px);display:flex;flex-direction:column;gap:12px}
  .guide-skeleton .sk{display:block;height:14px;border-radius:7px;background:var(--line-soft)}
  .guide-skeleton .sk-short{width:22%;height:11px;background:var(--line)}
  .guide-skeleton .sk-title{width:68%;height:32px;margin-bottom:8px;background:var(--line)}
  .guide-skeleton .sk-mid{width:76%}
  .guide-error h1{color:var(--ink);font-size:24px;margin-bottom:8px}
  .guide-error p{margin:0 0 18px}
  .guide-error a{display:inline-flex;text-decoration:none;color:#fff;background:var(--accent);border-radius:9px;padding:8px 14px;font-size:13px;font-weight:700}
  footer{margin-top:52px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

  /* ── responsive ── */
  @media (max-width:1080px){
    .page{grid-template-columns:230px minmax(0,1fr);gap:44px}
    .page-nav{display:none}
  }
  @media (max-width:900px){
    .page{grid-template-columns:1fr;gap:0}
    .toc,.page-nav{display:none}
    .topnav{display:flex;position:sticky;top:0;z-index:20;gap:8px;overflow-x:auto;padding:12px 16px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);-webkit-overflow-scrolling:touch}
    .topnav a{flex:none;text-decoration:none;font-size:13px;font-weight:600;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 13px}
    .topnav a.on{color:#fff;background:var(--accent);border-color:var(--accent)}
    .topnav .theme-toggle{flex:none;border-radius:999px;min-height:31px;padding:5px 11px}
    .col{padding:32px 0 72px;max-width:none}
    .grid2{grid-template-columns:1fr}
  }
  @media (max-width:520px){
    .page{padding:0 16px}
    .shot{min-width:360px}
  }
  @media (prefers-reduced-motion:reduce){*{scroll-behavior:auto}}
  html{scroll-behavior:smooth}