:root{
  --bg:#f5f7fa; --panel:#ffffff; --panel2:#fbfcfe; --fg:#18212e; --muted:#5d6878; --line:#e2e7ef; --line2:#d3dae5;
  --accent:#2563eb; --accent-soft:rgba(37,99,235,.10); --up:#c92a33; --down:#1b63cc; --warn:#a35c00; --ok:#0f7a52;
  --l1:#e07a10; --l2:#7c3aed; --l3:#0f9f8f; --shadow:0 1px 2px rgba(16,24,40,.05),0 4px 16px rgba(16,24,40,.05);
  --side:280px; --top:56px; --accent-ink:#1d4ed8; --lead:#222c3a;
  --font:"Pretendard","Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic","맑은 고딕",system-ui,-apple-system,"Segoe UI",sans-serif;
}
[data-theme=dark]{
  --bg:#0d1117; --panel:#151b24; --panel2:#111720; --fg:#e4e9f1; --muted:#97a3b4; --line:#242d3a; --line2:#2f3a4a;
  --accent:#6b9bff; --accent-soft:rgba(107,155,255,.13); --up:#ff5f66; --down:#4f95ff; --warn:#f0a63a; --ok:#3fcf95;
  --l1:#ffa24a; --l2:#b38cff; --l3:#3fd6c6; --accent-ink:var(--accent); --lead:#dbe1ea; --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html{scroll-padding-top:calc(var(--top) + 16px)}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:16px;line-height:1.75;word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
svg{stroke-linecap:round}
/* top bar */
.top{position:sticky;top:0;z-index:30;height:var(--top);display:flex;align-items:center;gap:12px;padding:0 18px;background:color-mix(in srgb,var(--panel) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--fg);font-size:17px;letter-spacing:-.2px}
.brand:hover{text-decoration:none}
.logo{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#7c3aed);display:grid;place-items:center}
.logo svg{width:20px;height:20px;fill:none;stroke:#fff;stroke-width:2}
.top .sub{color:var(--muted);font-size:13px;border-left:1px solid var(--line2);padding-left:12px}
.theme,.menu{border:1px solid var(--line2);background:var(--panel);color:var(--fg);width:38px;height:38px;border-radius:10px;cursor:pointer;display:grid;place-items:center}
.theme{margin-left:auto}
.theme svg,.menu svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8}
.theme .moon{display:none}
[data-theme=dark] .theme .sun{display:none}[data-theme=dark] .theme .moon{display:block}
.menu{display:none}
/* layout */
.layout{display:grid;grid-template-columns:var(--side) minmax(0,1fr) 210px;max-width:1440px;margin:0 auto}
.side{position:sticky;top:var(--top);height:calc(100vh - var(--top));overflow-y:auto;border-right:1px solid var(--line);padding:16px 12px 40px;background:var(--bg)}
.main{padding:32px 44px 60px;min-width:0;max-width:900px}
.toc{position:sticky;top:calc(var(--top) + 24px);align-self:start;padding:28px 16px;font-size:13.5px}
.toc a{display:block;color:var(--muted);padding:4px 0 4px 12px;border-left:2px solid var(--line)}
.toc a:hover{color:var(--accent);border-color:var(--accent);text-decoration:none}
.toch{font-weight:700;margin-bottom:8px;font-size:12px;letter-spacing:.06em;color:var(--muted)}
.layout:not(:has(.toc)){grid-template-columns:var(--side) minmax(0,1fr)}
.layout:not(:has(.toc)) .main{max-width:1080px}
/* sidebar */
.search{position:sticky;top:0;z-index:2;background:var(--bg);margin:-16px -12px 12px;padding:16px 12px 8px}
.search input,.gq,.hsearch input{width:100%;padding:9px 12px 9px 34px;border-radius:10px;border:1px solid var(--line2);background:var(--panel) url("search.svg") no-repeat 10px center/16px;color:var(--fg);font:inherit;font-size:14px;outline:none}
.search input:focus,.gq:focus,.hsearch input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
#noresult{font-size:13px;color:var(--muted);padding:8px 4px}
.nav{font-size:14.5px}
.nav ul{list-style:none;margin:2px 0 8px;padding:0 0 0 10px}
.nav a{display:block;color:var(--fg);padding:5px 10px;border-radius:7px;line-height:1.45}
.nav a:hover{background:var(--accent-soft);text-decoration:none}
.nav a.on{background:var(--accent-soft);color:var(--accent-ink);font-weight:700}
.nav a.ov{color:var(--muted)}
.nav .grp{font-size:11.5px;font-weight:700;color:var(--muted);padding:8px 10px 2px;letter-spacing:.04em}
.navhome{font-weight:700;display:flex!important;align-items:center;gap:8px}
.navcat summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px;font-weight:700;padding:7px 10px;border-radius:8px;user-select:none}
.navcat summary::-webkit-details-marker{display:none}
.navcat summary:hover{background:var(--accent-soft)}
.navcat summary::after{content:"";margin-left:6px;width:7px;height:7px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(-45deg);transition:.15s}
.navcat[open] summary::after{transform:rotate(45deg)}
.ico{width:18px;height:18px;display:inline-grid;place-items:center;color:var(--accent)}
.ico svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8}
.cnt{margin-left:auto;font-size:11px;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:0 7px;font-weight:600}
.scrim{display:none}
/* article */
.crumb{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumb a{color:var(--muted)}
h1{font-size:32px;line-height:1.3;margin:0 0 4px;letter-spacing:-.6px}
.en{color:var(--muted);font-size:14.5px;font-weight:500;margin-bottom:12px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 14px}
.tag{font-size:12px;font-weight:700;padding:2px 10px;border-radius:20px;background:var(--panel);border:1px solid var(--line2);color:var(--muted)}
.tag.bull{color:var(--up);border-color:color-mix(in srgb,var(--up) 40%,transparent);background:color-mix(in srgb,var(--up) 8%,transparent)}
.tag.bear{color:var(--down);border-color:color-mix(in srgb,var(--down) 40%,transparent);background:color-mix(in srgb,var(--down) 8%,transparent)}
.tag.acc{color:var(--accent-ink);border-color:color-mix(in srgb,var(--accent) 40%,transparent);background:var(--accent-soft)}
.lead{font-size:17.5px;color:var(--lead);border-left:4px solid var(--accent);padding:4px 0 4px 16px;margin:14px 0 22px}
h2{font-size:22px;margin:40px 0 12px;letter-spacing:-.3px;display:flex;align-items:center;gap:10px}
h2 .num{width:28px;height:28px;border-radius:8px;background:var(--accent-soft);color:var(--accent-ink);display:inline-grid;place-items:center;font-size:14px;flex:none}
h3{font-size:18px;margin:26px 0 8px}
section p,section li{color:var(--fg)}
ul,ol{padding-left:22px}
li{margin:4px 0}
b,strong{font-weight:700}
.fig{margin:18px 0 24px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px;box-shadow:var(--shadow)}
.fig figcaption{font-size:13.5px;color:var(--muted);padding:8px 6px 2px;line-height:1.6}
.callout{border-radius:12px;padding:12px 16px;margin:16px 0;border:1px solid var(--line);background:var(--panel);display:flex;gap:12px;font-size:15px}
.callout>b{flex:none;font-size:12px;padding:2px 8px;border-radius:6px;height:fit-content;margin-top:3px}
.callout.tip>b{background:var(--accent-soft);color:var(--accent)}
.callout.warn{border-color:color-mix(in srgb,var(--warn) 35%,transparent)}
.callout.warn>b{background:color-mix(in srgb,var(--warn) 10%,transparent);color:var(--warn)}
.callout.ex>b{background:color-mix(in srgb,var(--ok) 10%,transparent);color:var(--ok)}
.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"D2Coding",monospace;font-size:14px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:12px 0;white-space:pre-wrap;line-height:1.7;overflow-x:auto}
.tablewrap{overflow-x:auto;margin:14px 0 20px;border:1px solid var(--line);border-radius:12px;background:var(--panel)}
table{border-collapse:collapse;width:100%;font-size:14.5px}
caption{caption-side:top;text-align:left;font-weight:700;padding:10px 14px 0;font-size:14px}
th,td{padding:9px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--panel2);font-size:13px;color:var(--muted);white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:var(--accent-soft)}
td:first-child{font-weight:700;white-space:nowrap}
/* prev next */
.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}
.pn a{border:1px solid var(--line2);border-radius:12px;padding:12px 16px;background:var(--panel);color:var(--fg);display:flex;flex-direction:column;transition:.15s}
.pn a:hover{border-color:var(--accent);text-decoration:none;box-shadow:var(--shadow)}
.pn small{color:var(--muted);font-size:12px}
.pn span{font-weight:700}
.pn .next{text-align:right}
/* list (category) */
.list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin:14px 0}
.item{display:flex;flex-direction:column;gap:2px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--fg);box-shadow:var(--shadow);transition:.15s}
.item:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-1px)}
.item b{font-size:16px}.item .ien{font-size:12px;color:var(--muted)}
.item span:last-child{font-size:13.5px;color:var(--muted);line-height:1.6;margin-top:4px}
h2.lg{font-size:18px;margin:28px 0 4px}
/* home */
.hero{padding:26px 0 8px}
.hero h1{font-size:36px;line-height:1.3}
.hero p{font-size:16.5px;color:var(--muted);max-width:760px}
.hsearch{position:relative;max-width:620px;margin:18px 0 6px}
.hsearch input{padding:13px 16px 13px 40px;font-size:16px;border-radius:12px;background-position:13px center}
.hres{position:absolute;left:0;right:0;top:calc(100% + 6px);background:var(--panel);border:1px solid var(--line2);border-radius:12px;box-shadow:var(--shadow);z-index:10;max-height:360px;overflow:auto;display:none}
.hres.show{display:block}
.hres a{display:flex;justify-content:space-between;gap:12px;padding:9px 14px;color:var(--fg);border-bottom:1px solid var(--line)}
.hres a small{color:var(--muted)}
.hres a:hover,.hres a.sel{background:var(--accent-soft);text-decoration:none}
.hres .none{padding:12px 14px;color:var(--muted);font-size:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px;margin:28px 0}
.card{display:flex;flex-direction:column;gap:3px;padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--fg);box-shadow:var(--shadow);transition:.18s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--accent),#7c3aed);opacity:.8}
.card:hover{transform:translateY(-2px);border-color:var(--accent);text-decoration:none}
.cico{width:42px;height:42px;border-radius:12px;background:var(--accent-soft);display:grid;place-items:center;margin-bottom:8px;color:var(--accent)}
.cico svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8}
.card b{font-size:19px}.cen{font-size:12.5px;color:var(--muted)}
.cdesc{font-size:14px;color:var(--muted);line-height:1.6;margin:6px 0 10px}
.cmeta{margin-top:auto;font-size:12.5px;font-weight:700;color:var(--accent)}
.howto{margin-top:12px}
.steps li{margin:6px 0}
/* glossary */
.gq{max-width:420px;margin:4px 0 16px}
.gloss{margin:0}
.gi{padding:12px 0;border-bottom:1px solid var(--line)}
.gi dt{font-weight:800;font-size:16.5px}.gi dt small{font-weight:500;color:var(--muted);font-size:13px;margin-left:6px}
.gi dd{margin:4px 0 0;color:var(--fg)}
.glink{font-size:13px;white-space:nowrap}
.foot{border-top:1px solid var(--line);color:var(--muted);font-size:12.5px;text-align:center;padding:18px}
/* diagrams */
.diagram{width:100%;height:auto;display:block;font-family:var(--font)}
.diagram .bg{fill:var(--panel2)}
.diagram .grid{stroke:var(--line);stroke-width:1}
.diagram .sep{stroke:var(--line2);stroke-width:1}
.diagram .px{fill:none;stroke:var(--fg);stroke-width:2;stroke-linejoin:round}
.diagram .px.thick{stroke-width:2.6}
.diagram .px.faint{stroke:var(--muted);stroke-width:1.3;opacity:.8}
.diagram .px.sub{stroke-width:1.4}
.diagram .wick{stroke-width:1.5}
.diagram .cu{fill:var(--up);stroke:var(--up)}
.diagram .cd{fill:var(--down);stroke:var(--down)}
.diagram .body{stroke-width:1}
.diagram .dojibar{stroke-width:2.2}
.diagram .ctx{opacity:.38}
.diagram .hl{fill:var(--accent);opacity:.09}
.diagram .ann{stroke:var(--accent);stroke-width:1.5;stroke-dasharray:6 4;fill:none}
.diagram .ann2{stroke:var(--muted);stroke-width:1.2;stroke-dasharray:3 3;fill:none}
.diagram .solid{stroke:var(--accent);stroke-width:1.8;fill:none}
.diagram .sup{stroke:var(--up);stroke-width:1.8;fill:none}
.diagram .res{stroke:var(--down);stroke-width:1.8;fill:none}
.diagram .supd{stroke:var(--up);stroke-width:1.6;stroke-dasharray:6 4;fill:none}
.diagram .resd{stroke:var(--down);stroke-width:1.6;stroke-dasharray:6 4;fill:none}
.diagram .arrow{stroke:var(--accent);stroke-width:2;fill:none}
.diagram .arrow.soft{stroke:var(--muted);stroke-width:1.5;stroke-dasharray:4 4;opacity:.8}
.diagram .ahead{fill:var(--accent)}
.diagram text{fill:var(--fg);font-size:13px;paint-order:stroke;stroke:var(--panel2);stroke-width:3px;stroke-linejoin:round}
.diagram .t-acc{fill:var(--accent);font-weight:700;font-size:12.5px}
.diagram .t-muted{fill:var(--muted);font-size:11.5px}
.diagram .t-lbl{font-weight:800;font-size:14px}
.diagram .t-sm{font-size:11px;fill:var(--muted)}
.diagram .t-up{fill:var(--up);font-weight:700;font-size:12.5px}
.diagram .t-dn{fill:var(--down);font-weight:700;font-size:12.5px}
.diagram .t-pt{font-weight:800;font-size:16px}
.diagram .t-ratio{fill:var(--accent);font-weight:700;font-size:12.5px}
.diagram .t-leg{font-size:12px;fill:var(--muted)}
.diagram .dot{fill:var(--fg)}
.diagram .dot.acc{fill:var(--accent)}
.diagram .zone{fill:var(--accent);opacity:.14}
.diagram .zone-up{fill:var(--up);opacity:.12}
.diagram .zone-dn{fill:var(--down);opacity:.12}
.diagram .tri-a{fill:var(--accent);opacity:.10}
.diagram .tri-b{fill:var(--l2);opacity:.12}
.diagram .vol{fill:var(--muted);opacity:.45}
.diagram .l1{fill:none;stroke:var(--l1);stroke-width:1.8}
.diagram .l2{fill:none;stroke:var(--l2);stroke-width:1.8}
.diagram .l3{fill:none;stroke:var(--l3);stroke-width:1.8}
.diagram .l4{fill:none;stroke:var(--accent);stroke-width:1.6}
.diagram .lup{fill:none;stroke:var(--up);stroke-width:1.6}
.diagram .ldn{fill:none;stroke:var(--down);stroke-width:1.6}
.diagram .ld{fill:none;stroke:var(--muted);stroke-width:1.4;stroke-dasharray:5 3}
.diagram .sw.l1{fill:var(--l1)}.diagram .sw.l2{fill:var(--l2)}.diagram .sw.l3{fill:var(--l3)}.diagram .sw.l4{fill:var(--accent)}
.diagram .sw.lup{fill:var(--up)}.diagram .sw.ldn{fill:var(--down)}.diagram .sw.ld{fill:var(--muted)}
.diagram .hist-p{fill:var(--up);opacity:.6}.diagram .hist-n{fill:var(--down);opacity:.6}
.diagram .cloud-up{fill:var(--up);opacity:.13;stroke:none}.diagram .cloud-dn{fill:var(--down);opacity:.13;stroke:none}
.fig-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.fig-row.stack,.fig-row.stackjs{grid-template-columns:minmax(0,1fr)}
.fig-row.stack .diagram,.fig-row.stackjs .diagram{max-width:560px;margin:0 auto}
/* responsive */
@media (max-width:1180px){.layout{grid-template-columns:var(--side) minmax(0,1fr)}.toc{display:none}.main{padding-left:32px;padding-right:32px}}
@media (max-width:860px){
  .menu{display:grid}.top .sub{display:none}
  .layout,.layout:not(:has(.toc)){grid-template-columns:1fr}
  .side{position:fixed;left:0;top:var(--top);width:min(86vw,320px);z-index:25;transform:translateX(-102%);transition:transform .2s;background:var(--panel);box-shadow:var(--shadow)}
  body.navopen .side{transform:none}
  body.navopen .scrim{display:block;position:fixed;inset:var(--top) 0 0 0;background:rgba(0,0,0,.35);z-index:20}
  .main{padding:22px 18px 48px}
  h1{font-size:26px}.hero h1{font-size:27px}
  .pn{grid-template-columns:1fr}
}
@media print{.top,.side,.toc,.pn,.totop,.scrim,.skip,.figtools,.mtoc{display:none!important}.layout{display:block}.main{max-width:none;padding:0}.foot{display:block;border-top:1px solid #888;color:#333;margin-top:18px}.foot a{color:#333}figure,.fig,.callout,.formula,.tablewrap,tr{break-inside:avoid;page-break-inside:avoid}h2,h3{break-after:avoid;page-break-after:avoid}.figscroll{overflow:visible}svg.diagram{min-width:0!important;max-width:100%}}
.diagram .dot.up{fill:var(--up)}.diagram .dot.dn{fill:var(--down)}

.fig-row.mt12{margin-top:12px}
.diagram .yang{fill:none;stroke:var(--up);stroke-width:3.4;stroke-linejoin:miter}
.diagram .yin{fill:none;stroke:var(--down);stroke-width:1.4;stroke-linejoin:miter}
.diagram .bar-p{fill:var(--accent);opacity:.55}
.diagram .bar-m{fill:var(--muted);opacity:.35}
.diagram .lt1{fill:none;stroke:var(--l1);stroke-width:1;opacity:.8}
.diagram .lt4{fill:none;stroke:var(--accent);stroke-width:1;opacity:.8}
.diagram .vbar{fill:var(--muted);opacity:.35}
.diagram .vbar-va{fill:var(--accent);opacity:.35}
.diagram .vbar-poc{fill:var(--accent);opacity:.85}
.diagram .sw.lt1{fill:var(--l1)}.diagram .sw.lt4{fill:var(--accent)}
.diagram .hm1{fill:var(--accent);opacity:.12}.diagram .hm2{fill:var(--accent);opacity:.24}
.diagram .hm3{fill:var(--accent);opacity:.40}.diagram .hm4{fill:var(--accent);opacity:.62}
.diagram .box{fill:var(--panel);stroke:var(--line2);stroke-width:1.4}
.src{color:var(--muted);font-size:15px;margin-top:10px}

/* ===== mobile readability (2026-10-18) ===== */
main p,main li,main dd,main td,.lead,.fig figcaption{overflow-wrap:anywhere}
.mtoc{display:none}
.totop{position:fixed;right:16px;bottom:18px;z-index:22;width:46px;height:46px;border-radius:50%;border:1px solid var(--line2);background:var(--panel);color:var(--fg);box-shadow:var(--shadow);display:grid;place-items:center;cursor:pointer;opacity:0;pointer-events:none;transform:translateY(8px);transition:opacity .2s,transform .2s}
.totop svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2}
body.scrolled .totop{opacity:1;pointer-events:auto;transform:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* table scroll hint: shadows that appear only when there is more to scroll */
.tablewrap,.formula,.figscroll{background-image:linear-gradient(to right,var(--panel),var(--panel)),linear-gradient(to right,var(--panel),var(--panel)),linear-gradient(to right,rgba(0,0,0,.12),transparent),linear-gradient(to left,rgba(0,0,0,.12),transparent);background-position:left center,right center,left center,right center;background-repeat:no-repeat;background-size:24px 100%,24px 100%,12px 100%,12px 100%;background-attachment:local,local,scroll,scroll;background-color:var(--panel)}
.formula{background-color:var(--panel2)}
[data-theme=dark] .tablewrap,[data-theme=dark] .formula,[data-theme=dark] .figscroll{background-image:linear-gradient(to right,var(--panel),var(--panel)),linear-gradient(to right,var(--panel),var(--panel)),linear-gradient(to right,rgba(0,0,0,.55),transparent),linear-gradient(to left,rgba(0,0,0,.55),transparent)}
.figscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:10px}
.figtools{display:none;align-items:center;justify-content:space-between;gap:10px;padding:6px 4px 0;font-size:13px;color:var(--muted)}
.figbox{min-width:0}.figbox.wide .figtools{display:flex}
.zoombtn{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--line2);background:var(--panel2);color:var(--accent);font:inherit;font-size:14px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.zoombtn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2}
.zoomov{position:fixed;inset:0;z-index:60;background:var(--bg);display:flex;flex-direction:column}
.zoomov[hidden]{display:none}
.zoomhead{display:flex;align-items:center;gap:10px;padding:6px 8px 6px 16px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted);min-height:56px}
.zoomhead span{flex:1}
.zoomclose{width:44px;height:44px;border-radius:10px;border:1px solid var(--line2);background:var(--panel);color:var(--fg);font-size:22px;line-height:1;cursor:pointer}
.zoombody{flex:1;overflow:auto;padding:12px;-webkit-overflow-scrolling:touch}
.zoombody svg{display:block;max-width:none;height:auto}
body.zooming{overflow:hidden}
@media (max-width:1180px){
  .mtoc{display:block;margin:6px 0 18px;border:1px solid var(--line2);border-radius:12px;background:var(--panel)}
  .mtoc summary{cursor:pointer;min-height:48px;display:flex;align-items:center;padding:0 16px;font-weight:700;font-size:15px;list-style:none}
  .mtoc summary::-webkit-details-marker{display:none}
  .mtoc summary::after{content:"";margin-left:auto;width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:.15s}
  .mtoc[open] summary::after{transform:rotate(-135deg)}
  .mtoc nav{display:flex;flex-direction:column;padding:0 8px 8px;border-top:1px solid var(--line)}
  .mtoc a{display:flex;align-items:center;min-height:44px;padding:0 10px;color:var(--fg);border-radius:8px;font-size:15px}
  .mtoc a:hover{background:var(--accent-soft);text-decoration:none}
}
@media (max-width:860px){
  :root{--top:56px}
  body{font-size:16.5px;line-height:1.8}
  body.navopen{overflow:hidden}
  .top{padding:0 10px;gap:8px}
  .menu,.theme{width:44px;height:44px}
  .brand{min-height:44px;font-size:16.5px}
  .main{padding:20px 16px 72px;max-width:none}
  h1{font-size:clamp(24px,6.6vw,30px);line-height:1.32;letter-spacing:-.4px}
  .hero h1{font-size:clamp(26px,7.4vw,34px)}
  h2{font-size:clamp(19px,5.4vw,22px);margin:40px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
  section:first-of-type>h2{border-top:none;padding-top:0}
  h2 .num{width:30px;height:30px;font-size:15px}
  .lead{font-size:17px;padding-left:14px}
  .en{font-size:14.5px}
  .tag{font-size:13px;padding:3px 11px}
  .crumb{font-size:14px;line-height:20px}
  .crumb a{display:inline-block;padding:12px 4px;margin:-12px 0;min-width:44px;text-align:center}
  .crumb a:first-child{margin-left:-12px}
  .side{padding:12px 10px 60px;overscroll-behavior:contain}
  .search input,.gq,.hsearch input{font-size:16px;min-height:46px}
  .nav{font-size:15.5px}
  .nav a{min-height:44px;display:flex;align-items:center;padding:8px 12px}
  .navcat summary{min-height:46px}
  .nav .grp{font-size:12.5px;padding:10px 12px 4px}
  .hres a{min-height:46px;align-items:center}
  .callout{flex-direction:column;gap:6px;font-size:16px;padding:12px 14px}
  .callout>b{align-self:flex-start;font-size:13px;margin-top:0}
  .fig{padding:10px;margin:16px -4px 22px;border-radius:12px}
  .fig figcaption{font-size:14.5px}
  .formula{white-space:pre;font-size:13.5px;padding:12px 14px}
  table{font-size:15px}
  th{font-size:13.5px;white-space:normal;min-width:4.5em}
  th,td{padding:10px 12px}
  td:first-child{white-space:normal;min-width:5.5em}
  .pn{gap:10px;margin-top:40px}
  .pn a{min-height:64px;justify-content:center;padding:12px 16px;font-size:16px}
  .item{min-height:44px}
  .item b{font-size:16.5px}.item span:last-child{font-size:14.5px}
  .card b{font-size:18px}.cdesc{font-size:14.5px}.cmeta{font-size:13.5px}
  .glink{display:inline-block;padding:10px 0;margin:-10px 0;font-size:14px}
  .gi dd{font-size:16px}
  .toc{display:none}
}
@media (max-width:600px){
  /* stacked cards for tables with 3+ columns */
  .tablewrap.stack{overflow:visible;border:none;background:none}
  .tablewrap.stack table,.tablewrap.stack tbody,.tablewrap.stack tr,.tablewrap.stack td{display:block;width:100%}
  .tablewrap.stack thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
  .tablewrap.stack caption{display:block;padding:0 2px 8px;font-size:15px}
  .tablewrap.stack tr{border:1px solid var(--line2);border-radius:12px;background:var(--panel);margin:0 0 10px;padding:4px 0;box-shadow:var(--shadow)}
  .tablewrap.stack td{border-bottom:1px solid var(--line);padding:8px 14px;font-size:15.5px;white-space:normal}
  .tablewrap.stack tr td:last-child{border-bottom:none}
  .tablewrap.stack td::before{content:attr(data-label);display:block;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:1px}
  .tablewrap.stack td:first-child{font-size:16.5px;font-weight:800;background:none}
  .tablewrap.stack td:first-child::before{font-weight:600}
  .tablewrap.stack td:empty{display:none}
  .tablewrap.stack tbody tr:hover td{background:none}
  /* SVG labels: larger user-unit sizes so they stay legible when the figure is scaled down */
  .diagram text{font-size:14px}
  .diagram .t-acc,.diagram .t-up,.diagram .t-dn,.diagram .t-ratio{font-size:14px}
  .diagram .t-muted,.diagram .t-leg{font-size:13.5px}
  .diagram .t-sm{font-size:13.5px}
  .diagram .t-lbl{font-size:15px}
  .diagram .t-pt{font-size:17px}
}
@media (max-width:900px){.fig-row{grid-template-columns:1fr}}

/* ===== review2 UI fixes (2026-10-23) ===== */
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;background:var(--panel);color:var(--accent-ink);border:2px solid var(--accent);border-radius:10px;padding:10px 16px;font-weight:700;min-height:44px;display:inline-flex;align-items:center}
.skip:focus{top:8px;text-decoration:none}
main:focus{outline:none}
main p a,main li a,main td a,main dd a,.callout a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:color-mix(in srgb,currentColor 45%,transparent)}
main p a:hover,main li a:hover,main td a:hover,main dd a:hover{text-decoration-color:currentColor}
main a.term{color:inherit;text-decoration-style:dotted;text-decoration-color:color-mix(in srgb,var(--accent) 70%,transparent);text-decoration-thickness:1.5px}
main a.term:hover{color:var(--accent-ink)}
main p,main li,.callout{max-width:42em}
.tablewrap li,.tablewrap p{max-width:none}
svg.diagram{max-width:min(100%,calc(var(--vbw,640) * 1.5px))}
.figscroll svg.diagram{margin-inline:auto;display:block}
h3[class^="depth-"]::before,h3[class*=" depth-"]::before{content:"심화";font-size:12px;font-weight:700;color:var(--muted);border:1px solid var(--line2);border-radius:999px;padding:1px 8px;margin-right:8px;vertical-align:2px}
.search input:focus-visible,.gq:focus-visible,.hsearch input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.crumb a{display:inline-block;padding:4px 2px}
.toc a[aria-current="true"]{color:var(--fg);font-weight:700;border-color:var(--accent)}
.tag.lv{border-style:solid}
.tag.lv1,.item .lv1{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 45%,transparent);background:color-mix(in srgb,var(--ok) 9%,transparent)}
.tag.lv2,.item .lv2{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 45%,transparent);background:color-mix(in srgb,var(--warn) 9%,transparent)}
.tag.lv3,.item .lv3{color:var(--l2);border-color:color-mix(in srgb,var(--l2) 45%,transparent);background:color-mix(in srgb,var(--l2) 9%,transparent)}
.item b{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.item .lv{font-size:11.5px;font-weight:700;padding:0 8px;border-radius:20px;border:1px solid;line-height:1.6}
.prereq{font-size:14.5px;color:var(--muted);margin:2px 0 10px}
.prereq b{color:var(--fg);margin-right:4px}
.gidx{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 18px}
.gidx a{min-width:40px;min-height:36px;display:inline-flex;align-items:center;justify-content:center;padding:0 10px;border:1px solid var(--line2);border-radius:10px;background:var(--panel);color:var(--fg);font-weight:700;font-size:14px}
.gidx a:hover{border-color:var(--accent);color:var(--accent-ink);text-decoration:none}
.gi:target{background:var(--accent-soft);border-radius:10px;padding-left:10px;padding-right:10px}
.steps a{color:var(--accent-ink)}
@media (max-width:860px){
  .side{visibility:hidden;transition:transform .2s,visibility 0s .2s}
  body.navopen .side{visibility:visible;transition:transform .2s}
  .search{top:0;margin:-12px -10px 12px;padding:12px 10px 8px;background:var(--panel)}
  .gidx a{min-width:44px;min-height:44px}
  .crumb a{padding:12px 4px}
  .prereq{font-size:15px}
  .prereq a{display:inline-block;padding:8px 0;margin:-8px 0}
  main p,main li,.callout{max-width:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* generator additions 2026-10-23 */
.navfb .fbl{padding-left:0}
.gres{margin-top:8px;display:flex;flex-direction:column;gap:2px}
.gres:empty{display:none}
.gresh{font-size:11.5px;font-weight:700;color:var(--muted);padding:4px 10px 2px}
.gres a{display:block;padding:4px 10px;border-radius:7px;font-size:14px;color:var(--fg)}
.gres a:hover{background:var(--accent-soft);text-decoration:none}
.upd,.xrel{font-size:14px;color:var(--muted)}
.xrel a,.upd a{font-weight:600}
a.tag:hover{text-decoration:none;filter:brightness(.95)}
.gback{display:block;margin-top:4px;font-size:13.5px;color:var(--muted)}
.smap{columns:2 260px;column-gap:28px;padding-left:18px;margin:6px 0 18px}
.smap li{break-inside:avoid;margin:2px 0}
.smap .ien{color:var(--muted);font-size:13px}
.legend{display:grid;grid-template-columns:minmax(120px,auto) 1fr;gap:6px 16px;margin:10px 0 16px}
.legend dt{font-weight:700}
.legend dd{margin:0}
@media (max-width:560px){.legend{grid-template-columns:1fr}.legend dd{margin-bottom:8px}}
.same{border:1px solid var(--line2);border-left:4px solid var(--l2);background:var(--panel);border-radius:10px;padding:12px 16px;margin:16px 0}
.same > b{display:block;color:var(--l2);margin-bottom:4px}
.same ul{margin:4px 0 0;padding-left:18px}
.common-lim{font-size:14.5px;color:var(--muted)}
a.lbl{color:inherit;text-decoration:underline dotted;text-underline-offset:3px}

/* sticky search: no gap above it when the sidebar is scrolled */
.side{padding-top:0}.side .search{margin-top:0}
.why{border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0;padding:8px 14px;margin:10px 0 16px;font-size:15.5px}
.why b{color:var(--accent);margin-right:6px}
@media print{.why{background:none;border-left:2px solid #000}.why b{color:#000}}
.dflt{font-size:.94em;color:var(--fg)}
.dflt b{color:var(--ok);font-weight:600;margin-right:4px}
.dflt b::after{content:":"}