/* ── Theme tokens ─────────────────────────────────────────────────
   기본 = 다크 (시안 1 · Dim Slate)  /  [data-theme="light"] = 라이트 (시안 7 · Cool Gray)
   --navy = 제목/강조 텍스트 색(다크에선 밝은 블루), --red = 브랜드 강조(배지·불릿·활성) */
:root{
  --paper:#1E2430; --card:#262E3D; --alt:#232B39; --active:#2E3849;
  --ink:#DCE2EC; --navy:#EAF0FB; --muted:#98A2B4; --dim:#6B7488;
  --line:#343E52; --line2:#2C3444; --red:#FF5563;
  --topbar-bg:rgba(30,36,48,.9); --badge-line:rgba(255,85,99,.42);
  --sb-thumb:rgba(180,192,214,.10); --sb-thumb-h:rgba(180,192,214,.24);
  --drawer-shadow:rgba(0,0,0,.45); --card-shadow:rgba(0,0,0,.35);
  --sans:system-ui,-apple-system,"Malgun Gothic","Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  --mono:ui-monospace,Consolas,"Cascadia Mono",monospace;
  --topbar-h:60px;
}
:root[data-theme="light"]{
  --paper:#E7EAF0; --card:#F4F6FA; --alt:#EDEFF4; --active:#E1E6F2;
  --ink:#2A3040; --navy:#22307D; --muted:#5D6478; --dim:#8A91A3;
  --line:#D5DAE3; --line2:#DDE1E9; --red:#E00529;
  --topbar-bg:rgba(231,234,240,.9); --badge-line:rgba(224,5,41,.35);
  --sb-thumb:rgba(90,99,120,.16); --sb-thumb-h:rgba(90,99,120,.32);
  --drawer-shadow:rgba(20,26,46,.16); --card-shadow:rgba(20,26,46,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto} *{transition:none!important;scroll-behavior:auto!important}}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:18.5px;line-height:1.75;
  -webkit-font-smoothing:antialiased;transition:background-color .25s ease,color .2s ease}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--red);outline-offset:2px;border-radius:3px}
button{font-family:inherit;cursor:pointer}

/* ── top bar ── */
.topbar{position:fixed;inset:0 0 auto 0;height:var(--topbar-h);z-index:40;display:flex;align-items:center;gap:16px;
  padding:0 18px;background:var(--topbar-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:9px}
.brand-logo{display:block;width:26px;height:26px}
.brand-name{font-weight:800;letter-spacing:.05em;font-size:17px;color:var(--navy)}
.brand-sub{font-size:12.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#fff;background:var(--red);
  padding:2px 7px;border-radius:3px}
.topsearch{margin-left:14px;flex:1;min-width:0;max-width:380px;display:flex;align-items:center;gap:8px;
  background:var(--alt);border:1px solid var(--line);border-radius:6px;padding:0 12px;height:40px}
.topsearch:focus-within{border-color:var(--red);background:var(--card)}
.topsearch input{border:0;background:none;outline:none;width:100%;font-size:16px;color:var(--ink)}
.toplinks{margin-left:auto;display:flex;align-items:center;gap:16px;font-size:15.5px;font-weight:600;color:var(--muted)}
.toplinks a:hover{color:var(--navy)}
.langtoggle{display:inline-flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.langtoggle button{border:0;background:var(--card);color:var(--muted);font-size:14px;font-weight:700;padding:8px 13px;line-height:1;transition:background .15s,color .15s}
.langtoggle button+button{border-left:1px solid var(--line)}
.langtoggle button:hover{background:var(--alt)}
.langtoggle button.on{background:var(--red);color:#fff}
.themetoggle{width:38px;height:38px;flex:none;border:1px solid var(--line);border-radius:6px;background:var(--card);
  color:var(--navy);display:grid;place-items:center;transition:background .15s,border-color .15s,color .15s}
.themetoggle:hover{border-color:var(--red);color:var(--red)}
.themetoggle svg{width:19px;height:19px;display:block}
.themetoggle .ic-moon{display:none}
:root[data-theme="light"] .themetoggle .ic-sun{display:none}
:root[data-theme="light"] .themetoggle .ic-moon{display:block}
.menu-toggle{display:none;flex-direction:column;gap:4px;width:34px;height:34px;border:0;background:none;
  align-items:center;justify-content:center}
.menu-toggle span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ── layout grid ── */
.layout{display:grid;grid-template-columns:382px minmax(0,1fr) 240px;max-width:1580px;margin:0 auto;
  padding-top:var(--topbar-h)}

/* ── sidebar tree ── */
.sidebar{position:sticky;top:var(--topbar-h);align-self:start;height:calc(100svh - var(--topbar-h));
  overflow-y:auto;border-right:1px solid var(--line);padding:22px 14px 60px;
  scrollbar-width:thin;scrollbar-color:var(--sb-thumb) transparent}
.sidebar::-webkit-scrollbar{width:8px}
.sidebar::-webkit-scrollbar-track{background:transparent}
.sidebar::-webkit-scrollbar-thumb{background:var(--sb-thumb);border-radius:8px;
  border:2.5px solid transparent;background-clip:padding-box}
.sidebar:hover::-webkit-scrollbar-thumb{background:var(--sb-thumb-h);background-clip:padding-box}
.tree-group{margin-bottom:6px}
.tree-cat{width:100%;display:flex;align-items:center;gap:8px;background:none;border:0;text-align:left;
  padding:10px 10px;font-size:14px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--dim)}
.tree-cat .caret{margin-left:auto;transition:transform .2s;color:var(--dim)}
.tree-cat[aria-expanded="false"] .caret{transform:rotate(-90deg)}
.tree-links{display:grid;overflow:hidden}
.tree-cat[aria-expanded="false"]+.tree-links{display:none}
.tree-links a{display:block;padding:9px 12px 9px 16px;font-size:17px;color:var(--muted);border-left:2px solid var(--line2);
  margin-left:8px;border-radius:0 5px 5px 0}
.tree-links a .tl-name{display:block;word-break:keep-all}
.tree-links a:hover{color:var(--navy);background:var(--alt)}
.tree-links a.active{color:var(--navy);font-weight:700;border-left-color:var(--red);background:var(--active)}
.tree-links a .tl-sub{display:block;font-size:13.5px;color:var(--dim);font-weight:400}
.tree-links a.active .tl-sub{color:var(--muted)}
.tree-empty{padding:14px 12px;color:var(--dim);font-size:15px}

/* ── content ── */
.content{padding:44px clamp(20px,4vw,66px) 100px;min-width:0}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--dim);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb .sep{color:var(--line)}
.breadcrumb b{color:var(--muted);font-weight:600}
.doc-badge{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--red);border:1px solid var(--badge-line);padding:5px 11px;border-radius:4px;margin-bottom:16px}
.doc-h1{font-size:clamp(36px,4.8vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.16;color:var(--navy);
  text-wrap:balance}
.doc-tagline{margin-top:16px;font-size:clamp(19px,2.1vw,23px);color:var(--muted);max-width:66ch;line-height:1.7}
.doc-image{margin:26px 0 0;border:1px solid var(--line);border-radius:10px;background:var(--card);padding:16px;display:flex;justify-content:center}
.doc-image img{max-width:50%;height:auto;max-height:190px;object-fit:contain}
.doc-hr{border:0;border-top:1px solid var(--line);margin:36px 0}

.sec{scroll-margin-top:calc(var(--topbar-h) + 20px);margin-top:48px}
.sec h2{font-size:28px;font-weight:800;color:var(--ink);letter-spacing:-.01em;padding-bottom:11px;
  border-bottom:1px solid var(--line);margin-bottom:22px;display:flex;align-items:baseline;gap:10px}
.sec h2 .idx{font-family:var(--mono);font-size:16px;color:var(--red);font-weight:700}
.sec p{color:var(--muted);font-size:18px;margin-bottom:13px;max-width:72ch;line-height:1.78}
.sec p strong{color:var(--ink);font-weight:700}

/* features grid */
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:620px){.feat-grid{grid-template-columns:1fr}}
.feat-card{background:var(--alt);border:1px solid var(--line);border-radius:8px;padding:20px 22px}
.feat-card h3{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:7px}
.feat-card p{font-size:16.5px;color:var(--muted);margin:0;line-height:1.65}

/* product cards (home) */
.cardgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:980px){.cardgrid{grid-template-columns:1fr 1fr}}
@media(max-width:580px){.cardgrid{grid-template-columns:1fr}}
.prodcard{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);border-radius:10px;
  padding:22px 22px 18px;background:var(--card);transition:border-color .18s,box-shadow .18s,transform .18s}
.prodcard:hover{border-color:var(--red);box-shadow:0 10px 26px var(--card-shadow);transform:translateY(-2px)}
.pc-cat{font-size:12.5px;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--red)}
.pc-title{font-size:20px;font-weight:800;color:var(--navy);line-height:1.35}
.pc-soon{font-style:normal;font-size:12px;font-weight:700;color:#fff;background:var(--dim);border-radius:4px;
  padding:2px 8px;margin-left:6px;vertical-align:2px;white-space:nowrap}
.pc-desc{font-size:15.5px;color:var(--muted);line-height:1.6}
.pc-go{margin-top:auto;align-self:flex-end;color:var(--dim);font-size:20px;line-height:1}
.prodcard:hover .pc-go{color:var(--red)}

/* screenshots */
.shots{display:grid;gap:18px}
.shot{border:1px solid var(--line);border-radius:10px;background:var(--card);padding:14px}
/* 원본보다 확대하지 않음 — 스크린샷 글자 뭉개짐 방지 */
.shot img{display:block;margin:0 auto;max-width:100%;height:auto;border-radius:6px;border:1px solid var(--line2)}
.shot figcaption{margin-top:12px;font-size:15px;color:var(--dim);line-height:1.6}
@media(max-width:760px){.shot{padding:10px}}

/* map embed */
.mapwrap{border:1px solid var(--line);border-radius:10px;overflow:hidden}
.mapwrap iframe{display:block;width:100%;height:420px;border:0}
@media(max-width:640px){.mapwrap iframe{height:300px}}

/* spec table */
.spec-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px}
table.spec{width:100%;border-collapse:collapse;font-size:17px;min-width:520px}
table.spec th,table.spec td{text-align:left;padding:13px 17px;border-bottom:1px solid var(--line2);vertical-align:top}
table.spec tr:last-child th,table.spec tr:last-child td{border-bottom:0}
table.spec thead th{background:var(--alt);font-size:13.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--dim);font-weight:700;border-bottom:1px solid var(--line)}
table.spec tbody th{width:30%;font-weight:700;color:var(--ink);background:var(--alt)}
table.spec td{color:var(--muted);font-variant-numeric:tabular-nums}
table.spec td .mono{font-family:var(--mono);font-size:15px}

/* bullet list */
ul.blist{list-style:none;display:grid;gap:10px}
ul.blist li{position:relative;padding-left:20px;color:var(--muted);font-size:17.5px}
ul.blist li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border:1.6px solid var(--red);border-radius:50%}
ul.blist li b{color:var(--ink);font-weight:700}

/* app chips */
.appchips{display:flex;flex-wrap:wrap;gap:9px}
.appchips span{font-size:16px;font-weight:600;color:var(--navy);background:var(--alt);border:1px solid var(--line);
  padding:8px 15px;border-radius:999px}

/* resources */
.res-list{display:grid;gap:10px}
.res{display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:8px;padding:15px 19px;
  transition:border-color .18s,background .18s}
.res:hover{border-color:var(--red);background:var(--alt)}
.res .ico{flex:none;width:42px;height:42px;border-radius:7px;display:grid;place-items:center;background:var(--active);
  color:var(--navy);font-family:var(--mono);font-size:12.5px;font-weight:700;letter-spacing:.02em}
.res .rt{font-size:17.5px;font-weight:700;color:var(--ink)}
.res .rd{font-size:14.5px;color:var(--dim)}
.res .arrow{margin-left:auto;color:var(--dim);font-size:20px}
.res:hover .arrow{color:var(--red)}

/* callout */
.callout{display:flex;gap:14px;background:var(--active);border:1px solid var(--line);border-left:3px solid var(--navy);
  border-radius:8px;padding:17px 19px;margin-top:20px}
.callout .ci{color:var(--navy);font-weight:800;flex:none;font-size:18.5px}
.callout p{margin:0;font-size:17px;color:var(--muted)}
.callout a{color:var(--navy);font-weight:700;border-bottom:1px solid var(--red)}

/* prev/next */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:58px}
@media(max-width:520px){.pager{grid-template-columns:1fr}}
.pager a{border:1px solid var(--line);border-radius:8px;padding:17px 19px;transition:border-color .18s}
.pager a:hover{border-color:var(--red)}
.pager .pl{font-size:13.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.pager .pt{font-size:18px;font-weight:700;color:var(--navy);margin-top:5px}
.pager a.next{text-align:right}

/* ── right toc ── */
.toc{position:sticky;top:var(--topbar-h);align-self:start;height:calc(100svh - var(--topbar-h));
  overflow-y:auto;padding:44px 20px 60px}
.toc-title{font-size:13px;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--dim);margin-bottom:14px}
#toc a{display:block;font-size:16px;color:var(--muted);padding:6px 0 6px 12px;border-left:2px solid var(--line2);
  line-height:1.45}
#toc a:hover{color:var(--navy)}
#toc a.active{color:var(--navy);font-weight:700;border-left-color:var(--red)}

/* ── mobile collapsible ToC (visible only when right ToC is hidden) ── */
.mtoc{display:none;margin:0 0 8px;border:1px solid var(--line);border-radius:8px;background:var(--alt)}
.mtoc summary{cursor:pointer;padding:12px 16px;font-size:13.5px;font-weight:800;letter-spacing:.13em;
  text-transform:uppercase;color:var(--dim);list-style:none;display:flex;align-items:center;gap:8px}
.mtoc summary::-webkit-details-marker{display:none}
.mtoc summary::before{content:"▸";color:var(--red);transition:transform .15s}
.mtoc[open] summary::before{transform:rotate(90deg)}
.mtoc nav{padding:4px 16px 14px;display:grid;gap:2px}
.mtoc nav a{font-size:16px;color:var(--muted);padding:6px 0 6px 12px;border-left:2px solid var(--line)}
.mtoc nav a:hover{color:var(--navy);border-left-color:var(--red)}

/* ── site footer ── */
.sitefooter{border-top:1px solid var(--line);background:var(--alt)}
.fwrap{max-width:1520px;margin:0 auto;padding:26px 28px;display:flex;align-items:center;gap:10px 22px;
  flex-wrap:wrap;font-size:14.5px;color:var(--muted)}
.f-brand{display:flex;align-items:center;gap:8px;font-weight:800;color:var(--navy);letter-spacing:.04em}
.f-brand img{display:block}
.f-meta{color:var(--dim)}
.f-links a{font-weight:600;color:var(--muted)}
.f-links a:hover{color:var(--navy)}
.f-sep{color:var(--line);margin:0 6px}
.f-copy{margin-left:auto;color:var(--dim);font-size:13.5px}
@media(max-width:760px){.f-copy{margin-left:0}}

/* ── responsive ── */
@media(max-width:1080px){
  .layout{grid-template-columns:356px minmax(0,1fr)}
  .toc{display:none}
  .mtoc{display:block}
}
@media(max-width:760px){
  .layout{grid-template-columns:1fr}
  .toplinks a{display:none}
  .topsearch{max-width:none}
  .menu-toggle{display:flex}
  .doc-image{padding:12px}
  .doc-image img{max-width:100%;max-height:320px}   /* 모바일: 이미지 크게 */
  .content{padding:32px 18px 90px}
  .sidebar{position:fixed;top:var(--topbar-h);left:0;bottom:0;width:300px;max-width:86vw;z-index:35;background:var(--card);
    transform:translateX(-100%);transition:transform .24s ease;box-shadow:2px 0 24px var(--drawer-shadow)}
  .sidebar.open{transform:none}
  .scrim{position:fixed;inset:var(--topbar-h) 0 0 0;background:rgba(0,0,0,.34);z-index:34}
}
@media(max-width:420px){
  .brand-sub{display:none}
  .topbar{gap:10px;padding:0 12px}
}