/* Lumadex user manual reader. Colours come from the program's own theme (the host sets --app-* from Lumadex's
   palette); everything else is derived here so the reader matches Lumadex Desktop in both themes. */
:root{
  --app-page:#101010;--app-panel:#161616;--app-surface:#202020;--app-border:#3d3d3d;--app-text:#f5f5f5;--app-muted:#b6b6b6;
  --app-primary:#f5f5f5;--app-selection:#333333;--app-field:#111111;--app-on-primary:#111111;
  --bg:var(--app-page);--panel:var(--app-panel);--surface:var(--app-surface);--line:var(--app-border);--ink:var(--app-text);--muted:var(--app-muted);
  --accent:var(--app-primary);--on-accent:var(--app-on-primary);--select:var(--app-selection);--field:var(--app-field);
  --soft:color-mix(in srgb,var(--line) 55%,transparent);--hover:color-mix(in srgb,var(--ink) 6%,transparent);
  --spectrum:linear-gradient(90deg,#3b6cff,#00b3c7,#2fbf71,#f2c230,#f2803a,#e6455a,#9b5cf0);
  --good:#2fbf71;--warn:#f2a53a;--info:#4c8dff;
  --radius:10px;--radius-lg:14px;--top:60px;--side:288px;--rail:220px;--luma:420px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font:"Segoe UI Variable Text","Segoe UI",Inter,system-ui,-apple-system,sans-serif;
  --display:"Segoe UI Variable Display","Segoe UI",Inter,system-ui,-apple-system,sans-serif;
  --mono:"Cascadia Code",Consolas,ui-monospace,monospace;
  color-scheme:dark;
}
:root[data-theme=light]{color-scheme:light;--good:#17924f;--warn:#b86a00;--info:#2459d6}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:14px/1.6 var(--font);-webkit-font-smoothing:antialiased;overflow:hidden}
:root.transitioning *{transition:background-color .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease)!important}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit}
kbd{font:600 11px/1 var(--font);padding:4px 6px;border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;color:var(--muted);background:var(--surface);white-space:nowrap}
mark{background:color-mix(in srgb,#f2c230 38%,transparent);color:inherit;border-radius:3px;padding:0 1px}
.svg{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round;display:block}
i[data-icon]{display:inline-flex}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.skip{position:fixed;left:12px;top:-60px;z-index:100;background:var(--accent);color:var(--on-accent);padding:8px 12px;border-radius:8px}
.skip:focus{top:12px}
[hidden]{display:none!important}
:root:not([data-host=app]) .luma-only{display:none!important}

/* ------------------------------------------------------------ top bar */
.app{height:100%;display:grid;grid-template-rows:var(--top) 1fr}
.topbar{display:flex;align-items:center;gap:14px;padding:0 18px;background:var(--panel);border-bottom:1px solid var(--line);position:relative;z-index:20}
.topbar::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:var(--spectrum);opacity:.55}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:calc(var(--side) - 32px)}
.brand img{border-radius:7px}
.brand span{display:flex;flex-direction:column;line-height:1.15}
.brand strong{font:650 15px/1.1 var(--display);letter-spacing:-.01em}
.brand small{color:var(--muted);font-size:12px}
.search-trigger{flex:1;max-width:560px;height:38px;display:flex;align-items:center;gap:10px;padding:0 8px 0 12px;border:1px solid var(--line);border-radius:9px;background:var(--field);color:var(--muted);text-align:left;transition:border-color .15s}
.search-trigger:hover{border-color:color-mix(in srgb,var(--ink) 35%,var(--line))}
.search-trigger span{flex:1;font-size:13px}
.tools{margin-left:auto;display:flex;align-items:center;gap:8px}
.icon-button{width:36px;height:36px;display:inline-grid;place-items:center;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted)}
.icon-button:hover{background:var(--hover);color:var(--ink)}
.luma-trigger,.tool-link{height:36px;display:inline-flex;align-items:center;gap:8px;padding:0 13px;border-radius:9px;font-size:13px;font-weight:600;text-decoration:none;border:1px solid var(--line);background:var(--surface)}
.luma-trigger{position:relative;border-color:transparent;background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--spectrum) border-box;border:1px solid transparent}
.luma-trigger:hover,.tool-link:hover{background:linear-gradient(var(--select),var(--select)) padding-box,var(--spectrum) border-box}
.tool-link:hover{background:var(--select)}
.luma-open .luma-trigger{background:linear-gradient(var(--select),var(--select)) padding-box,var(--spectrum) border-box}
#theme .sun{display:none}:root[data-theme=light] #theme .sun{display:inline-flex}:root[data-theme=light] #theme .moon{display:none}
.menu-button{display:none}

/* ------------------------------------------------------------ layout */
.workspace{display:grid;grid-template-columns:var(--side) 1fr;min-height:0;position:relative;transition:grid-template-columns .3s var(--ease)}
.luma-open .workspace{grid-template-columns:var(--side) 1fr var(--luma)}
main:focus,main:focus-visible{outline:none}
main{overflow:auto;min-width:0;outline:none;scroll-behavior:auto;scrollbar-gutter:stable}
.scrim{position:fixed;inset:var(--top) 0 0 0;background:rgba(0,0,0,.45);z-index:30}

/* ------------------------------------------------------------ sidebar */
.sidebar{display:flex;flex-direction:column;min-height:0;background:var(--panel);border-right:1px solid var(--line)}
.filter{position:relative;margin:14px 14px 6px}
.filter .svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted)}
.filter input{width:100%;height:34px;border:1px solid var(--line);border-radius:8px;background:var(--field);padding:0 10px 0 32px;font-size:13px;outline:none}
.filter input:focus{border-color:var(--accent)}
#contents{flex:1;overflow:auto;padding:4px 8px 16px;scrollbar-width:thin}
.toc-home{display:flex;align-items:center;gap:10px;padding:8px 10px;margin:2px 0 6px;border-radius:8px;text-decoration:none;font-weight:600;font-size:13px}
.toc-home .svg{width:17px;height:17px;color:var(--muted)}
.toc-home:hover{background:var(--hover)}
.toc-home[aria-current=page]{background:var(--select)}
.toc-group{margin-top:2px}
.toc-head{width:100%;display:flex;align-items:center;gap:10px;padding:7px 10px;border:0;border-radius:8px;background:transparent;text-align:left;font-size:13px;font-weight:600}
.toc-head:hover{background:var(--hover)}
.toc-icon .svg{width:17px;height:17px;color:var(--muted)}
.toc-title{flex:1;min-width:0}
.toc-count{font-size:11px;color:var(--muted);font-weight:500}
.toc-chevron{width:14px;height:14px;color:var(--muted);transition:transform .2s var(--ease)}
.toc-group.open .toc-chevron{transform:rotate(90deg)}
.toc-items{display:none;padding:2px 0 8px 19px}
.toc-group.open .toc-items{display:block}
.toc-item{display:flex;align-items:center;gap:6px;padding:5px 10px 5px 17px;border-left:1px solid var(--line);text-decoration:none;color:var(--muted);font-size:13px;line-height:1.4}
.toc-item:hover{color:var(--ink);border-left-color:color-mix(in srgb,var(--ink) 50%,var(--line))}
.toc-item[aria-current=page]{color:var(--ink);font-weight:600;border-left:2px solid var(--accent);padding-left:16px;background:linear-gradient(90deg,var(--hover),transparent)}
.badge{margin-left:auto;font-size:10px;font-weight:600;letter-spacing:.02em;padding:1px 6px;border-radius:999px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.badge.new{border-color:transparent;background:color-mix(in srgb,var(--good) 18%,transparent);color:var(--good)}
.badge+.badge{margin-left:4px}
.toc-empty{padding:16px 12px;color:var(--muted);font-size:13px}
.sidebar-foot{margin:0;padding:10px 18px 14px;border-top:1px solid var(--line);font-size:11.5px;color:var(--muted)}

/* ------------------------------------------------------------ shared */
.page{max-width:1180px;margin:0 auto;padding:36px 44px 72px}
.eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
h1,h2,h3,h4{font-family:var(--display);letter-spacing:-.015em;margin:0}
.lead{font-size:16.5px;line-height:1.55;color:var(--muted);max-width:68ch;margin:10px 0 0}
.muted{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:7px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-size:12.5px;line-height:1.3;text-align:left}
.chip .svg{width:14px;height:14px;color:var(--muted)}
.chip:hover:not(:disabled){border-color:color-mix(in srgb,var(--ink) 40%,var(--line));background:var(--select)}
.chip:disabled{cursor:default;opacity:.75}
.button{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--surface);font-weight:600}
.button.small{padding:6px 11px;font-size:12.5px;margin-top:8px}
.button:hover{background:var(--select)}
.page-foot{margin:40px 0 0;font-size:12px}
.card-grid{display:grid;gap:12px}
.card-grid.two{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.card-grid.three{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.guide-card{display:flex;align-items:flex-start;gap:12px;padding:14px 14px 14px 16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);text-decoration:none;transition:border-color .15s,transform .15s var(--ease),background .15s}
.guide-card:hover{border-color:color-mix(in srgb,var(--ink) 38%,var(--line));background:var(--surface)}
.card-icon{width:34px;height:34px;flex:none;display:grid;place-items:center;border-radius:9px;background:var(--surface);border:1px solid var(--line)}
.card-icon .svg{width:17px;height:17px}
.card-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.card-body small{font-size:11.5px;color:var(--muted);font-weight:600}
.card-body strong{font-size:14px;line-height:1.35}
.card-text{font-size:13px;color:var(--muted);line-height:1.45}
.card-arrow{width:16px;height:16px;color:var(--muted);margin-top:3px;transition:transform .15s var(--ease)}
.guide-card:hover .card-arrow{transform:translateX(3px);color:var(--ink)}

/* ------------------------------------------------------------ home */
.home{max-width:1120px}
.home-hero{position:relative;padding:44px 44px 40px;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:
  radial-gradient(900px 300px at 85% -20%,color-mix(in srgb,#3b6cff 16%,transparent),transparent 70%),
  radial-gradient(700px 260px at 0% 120%,color-mix(in srgb,#2fbf71 10%,transparent),transparent 70%),var(--panel)}
.home-hero::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--spectrum)}
.home-hero h1{font-size:40px;line-height:1.1;margin-top:10px;font-weight:700}
.hero-actions{display:grid;gap:12px;margin-top:26px;max-width:720px}
.hero-search{display:flex;align-items:center;gap:12px;height:50px;padding:0 12px 0 16px;border:1px solid var(--line);border-radius:12px;background:var(--field);color:var(--muted);font-size:15px;text-align:left}
.hero-search span{flex:1}
.hero-search:hover{border-color:color-mix(in srgb,var(--ink) 35%,var(--line))}
.hero-ask{display:flex;align-items:center;gap:10px;height:50px;padding:0 6px 0 14px;border-radius:12px;border:1px solid transparent;background:linear-gradient(var(--field),var(--field)) padding-box,var(--spectrum) border-box}
.hero-ask input{flex:1;border:0;background:transparent;outline:none;font-size:15px;min-width:0}
.hero-ask-mark .svg{width:19px;height:19px}
.send{width:38px;height:38px;flex:none;display:grid;place-items:center;border:0;border-radius:9px;background:var(--accent);color:var(--on-accent)}
.send .svg{width:17px;height:17px}
.send:hover{filter:brightness(1.1)}
.home-hero .chips{margin-top:2px}
.home-block{margin-top:44px}
.home-block>h2{font-size:21px;font-weight:650}
.home-block>p{margin:4px 0 16px;font-size:13.5px}
.path{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;counter-reset:p}
.path-step{height:100%;display:flex;flex-direction:column;gap:6px;padding:18px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);text-decoration:none;position:relative;transition:border-color .15s,background .15s}
.path-step:hover{border-color:color-mix(in srgb,var(--ink) 38%,var(--line));background:var(--surface)}
.path-number{width:28px;height:28px;display:grid;place-items:center;border-radius:50%;font-weight:700;font-size:13px;background:var(--accent);color:var(--on-accent);margin-bottom:6px}
.path-step strong{font-size:14.5px;line-height:1.35}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.topic{display:flex;flex-direction:column;padding:18px 18px 14px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel)}
.topic-head{display:flex;align-items:center;gap:12px;text-decoration:none}
.topic-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:11px;border:1px solid var(--line);background:var(--surface)}
.topic-icon .svg{width:20px;height:20px}
.topic-text{display:flex;flex-direction:column;line-height:1.25}
.topic-text strong{font:650 15.5px/1.25 var(--display)}
.topic-text small{color:var(--muted);font-size:12px;margin-top:2px}
.topic-head:hover strong{text-decoration:underline;text-underline-offset:3px}
.topic-summary{margin:12px 0 4px;color:var(--muted);font-size:13px;line-height:1.5}
.topic-links{list-style:none;margin:8px 0 0;padding:10px 0 0;border-top:1px solid var(--soft)}
.topic-links li a{display:flex;align-items:center;gap:6px;padding:4px 0;font-size:13px;text-decoration:none}
.topic-links li a:hover{text-decoration:underline;text-underline-offset:3px}
.topic-links .more{color:var(--muted);font-weight:600}
.topic-links .more .svg{width:14px;height:14px}
.help-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.help-tile{display:flex;align-items:flex-start;gap:12px;padding:16px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);text-align:left}
.help-tile:hover{background:var(--surface);border-color:color-mix(in srgb,var(--ink) 38%,var(--line))}

/* ------------------------------------------------------------ article */
.article-head{max-width:880px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);margin-bottom:14px}
.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.crumb-sep{width:12px;height:12px}
.article-head h1{font-size:34px;line-height:1.15;font-weight:700}
.tags{display:flex;gap:8px;margin-top:14px}
.tag{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.tag.new{color:var(--good);border-color:color-mix(in srgb,var(--good) 45%,transparent);background:color-mix(in srgb,var(--good) 10%,transparent)}
.tag.addon{text-transform:none}
.meta{display:flex;flex-wrap:wrap;align-items:stretch;gap:12px;margin-top:22px}
.where{flex:1 1 420px;display:flex;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.meta-icon .svg{color:var(--muted);margin-top:2px}
.where small{display:block;font-size:11.5px;font-weight:600;color:var(--muted);margin-bottom:6px}
.where-path{display:flex;flex-direction:column;gap:6px}
.where-line{display:flex;flex-wrap:wrap;align-items:center;gap:4px}
.where-chip{padding:2px 8px;border-radius:6px;background:var(--surface);border:1px solid var(--soft);font-size:12.5px;line-height:1.5}
.where-sep{width:12px;height:12px;color:var(--muted)}
.where-or{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.ask-inline{flex:0 0 auto;align-self:stretch;display:flex;align-items:center;gap:10px;padding:0 16px;border-radius:var(--radius);font-weight:600;font-size:13px;border:1px solid transparent;background:linear-gradient(var(--panel),var(--panel)) padding-box,var(--spectrum) border-box;min-height:46px}
.ask-inline:hover{background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--spectrum) border-box}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) var(--rail);gap:48px;margin-top:30px}
.article-body{min-width:0;max-width:820px}
.block{margin-top:38px;scroll-margin-top:24px;border-radius:8px}
.block:first-child{margin-top:0}
.block.flash{animation:flash 1.2s var(--ease)}
@keyframes flash{0%{box-shadow:0 0 0 6px var(--select);background:var(--select)}100%{box-shadow:0 0 0 6px transparent;background:transparent}}
.block>h2{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:650;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--soft)}
.block-icon{width:28px;height:28px;display:grid;place-items:center;border-radius:8px;background:var(--surface);border:1px solid var(--line)}
.block-icon .svg{width:15px;height:15px}
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.checklist li{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--soft);border-radius:var(--radius);background:var(--panel)}
.tick{width:20px;height:20px;flex:none;display:grid;place-items:center;border-radius:50%;background:color-mix(in srgb,var(--good) 16%,transparent);color:var(--good);margin-top:1px}
.tick .svg{width:13px;height:13px;stroke-width:2.4}
.steps{list-style:none;margin:0;padding:0;position:relative}
.step{display:grid;grid-template-columns:34px 1fr;gap:16px;position:relative;padding-bottom:22px;scroll-margin-top:24px}
.step:not(:last-child)::before{content:"";position:absolute;left:16.5px;top:36px;bottom:4px;width:1px;background:var(--line)}
.step-number{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;font-weight:700;font-size:14px;border:1px solid var(--line);background:var(--surface)}
.step-text h3{font-size:15.5px;font-weight:650;margin:5px 0 4px}
.step-text p{margin:0;color:color-mix(in srgb,var(--ink) 86%,var(--muted))}
.controls{margin:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.control{display:grid;grid-template-columns:minmax(150px,32%) 1fr;border-top:1px solid var(--soft)}
.control:first-child{border-top:0}
.control:nth-child(odd){background:var(--panel)}
.control dt{padding:11px 14px;font-weight:600;font-size:13.5px}
.control dd{margin:0;padding:11px 14px;color:color-mix(in srgb,var(--ink) 86%,var(--muted))}
.problem{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);margin-top:8px}
.problem summary{list-style:none;display:flex;align-items:center;gap:10px;padding:12px 14px;font-weight:600;cursor:pointer}
.problem summary::-webkit-details-marker{display:none}
.problem summary span{flex:1}
.problem-chevron{width:15px;height:15px;color:var(--muted);transition:transform .2s var(--ease)}
.problem[open] .problem-chevron,.working[open] .problem-chevron{transform:rotate(90deg)}
.problem p{margin:0;padding:0 14px 14px;color:color-mix(in srgb,var(--ink) 86%,var(--muted))}
.callout{display:flex;gap:12px;padding:14px 16px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel)}
.callout p{margin:0}.callout p+p{margin-top:8px}
.callout-icon .svg{width:20px;height:20px}
.callout.result{border-color:color-mix(in srgb,var(--good) 40%,var(--line));background:color-mix(in srgb,var(--good) 7%,var(--panel))}
.callout.result .callout-icon{color:var(--good)}
.callout.note{border-color:color-mix(in srgb,var(--info) 40%,var(--line));background:color-mix(in srgb,var(--info) 6%,var(--panel))}
.callout.note .callout-icon{color:var(--info)}
.sources{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.source{display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:11px 14px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;background:var(--panel)}
.source span{color:var(--muted);font-size:12.5px;grid-column:1}
.source .svg{grid-row:1/3;grid-column:2;align-self:center;color:var(--muted)}
.source:hover{background:var(--surface)}
.shot{margin:0 0 6px}
.shot.lead{margin:0 0 30px}
.shot-frame{position:relative;display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);cursor:zoom-in}
.shot-frame img{display:block;width:100%;height:auto;transition:transform .4s var(--ease)}
.shot-frame:hover img{transform:scale(1.012)}
.shot-zoom{position:absolute;right:10px;top:10px;width:32px;height:32px;display:grid;place-items:center;border-radius:8px;background:color-mix(in srgb,var(--panel) 85%,transparent);border:1px solid var(--line);opacity:0;transition:opacity .15s}
.shot-frame:hover .shot-zoom,.shot-frame:focus-visible .shot-zoom{opacity:1}
.shot-zoom .svg{width:16px;height:16px}
.shot figcaption{margin-top:8px;font-size:12.5px;color:var(--muted)}
.shot.missing{display:none}
.shot-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--soft)}
.pager-link{display:flex;align-items:center;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;background:var(--panel)}
.pager-link:hover{background:var(--surface);border-color:color-mix(in srgb,var(--ink) 38%,var(--line))}
.pager-link span{display:flex;flex-direction:column;min-width:0}
.pager-link small{font-size:11.5px;color:var(--muted);font-weight:600}
.pager-link strong{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager-link.next{justify-content:flex-end;text-align:right}
.pager-link .svg{color:var(--muted)}
.rail{position:sticky;top:0;align-self:start;padding-top:4px;font-size:13px;display:flex;flex-direction:column;gap:2px;max-height:calc(100vh - var(--top) - 40px);overflow:auto}
.rail strong{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:8px}
.rail a{padding:4px 0 4px 12px;border-left:1px solid var(--line);text-decoration:none;color:var(--muted)}
.rail a:hover{color:var(--ink)}
.rail a.active{color:var(--ink);border-left:2px solid var(--accent);padding-left:11px;font-weight:600}
.rail .to-top{margin-top:14px;border:0;padding-left:0;display:flex;align-items:center;gap:6px}
.rail .to-top .svg{width:14px;height:14px}

/* ------------------------------------------------------------ search palette */
.palette{position:fixed;inset:0;z-index:60;background:rgba(0,0,0,.5);display:flex;justify-content:center;align-items:flex-start;padding:10vh 16px 16px;animation:fade .15s}
.palette-box{width:min(680px,100%);max-height:72vh;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:16px;background:var(--panel);box-shadow:0 30px 80px rgba(0,0,0,.45);overflow:hidden;animation:rise .2s var(--ease)}
@keyframes fade{from{opacity:0}}@keyframes rise{from{opacity:0;transform:translateY(8px) scale(.99)}}
.palette-input{display:flex;align-items:center;gap:10px;padding:0 14px;height:56px;border-bottom:1px solid var(--line)}
.palette-input input{flex:1;border:0;background:transparent;outline:none;font-size:16px;min-width:0}
.palette-input>.svg,.palette-input i .svg{color:var(--muted)}
.palette-results{overflow:auto;padding:8px}
.palette-label{padding:6px 10px;font-size:11.5px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.palette-empty{padding:14px 12px;color:var(--muted)}
.palette-row{width:100%;display:flex;align-items:center;gap:12px;padding:10px 12px;border:0;border-radius:10px;background:transparent;text-decoration:none;text-align:left}
.palette-row[aria-selected=true]{background:var(--select)}
.palette-icon{width:32px;height:32px;flex:none;display:grid;place-items:center;border-radius:8px;border:1px solid var(--line);background:var(--surface)}
.palette-icon .svg{width:16px;height:16px}
.palette-icon.luma{border-color:transparent;background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--spectrum) border-box}
.palette-text{flex:1;min-width:0;display:flex;flex-direction:column}
.palette-text strong{font-size:14px}
.palette-sub{font-size:12.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.palette-sub em{font-style:normal;font-weight:600;color:color-mix(in srgb,var(--ink) 70%,var(--muted))}
.palette-go{width:15px;height:15px;color:var(--muted);opacity:0}
.palette-row[aria-selected=true] .palette-go{opacity:1}
.palette-ask{margin-top:6px;border-top:1px solid var(--soft);border-radius:0 0 10px 10px}
.palette-foot{display:flex;gap:16px;padding:9px 14px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.palette-foot kbd{margin-right:3px}

/* ------------------------------------------------------------ Luma */
.luma{position:fixed;top:var(--top);right:0;bottom:0;width:var(--luma);display:flex;flex-direction:column;background:var(--panel);border-left:1px solid var(--line);z-index:40;transform:translateX(100%);transition:transform .3s var(--ease),visibility .3s;visibility:hidden}
.luma-open .luma{transform:none;visibility:visible}
.luma-head{display:flex;align-items:center;gap:10px;padding:12px 12px 12px 16px;border-bottom:1px solid var(--line)}
.luma-head>div{flex:1;display:flex;flex-direction:column;line-height:1.25}
.luma-head strong{font:650 15px/1.2 var(--display)}
.luma-head small{font-size:11.5px;color:var(--muted)}
.luma-mark{width:30px;height:30px;flex:none;display:grid;place-items:center;border-radius:9px;border:1px solid transparent;background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--spectrum) border-box}
.luma-mark .svg{width:16px;height:16px}
.luma-mark.big{width:48px;height:48px;border-radius:14px}.luma-mark.big .svg{width:24px;height:24px}
.luma-mark.small{width:22px;height:22px;border-radius:7px}.luma-mark.small .svg{width:12px;height:12px}
.luma-log{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:14px}
.luma-hello{margin:auto 0;display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:8px 4px}
.luma-hello strong{font:650 18px/1.2 var(--display);margin-top:6px}
.luma-hello p{margin:0 0 8px;color:var(--muted);font-size:13.5px}
.msg{max-width:100%;animation:rise .25s var(--ease)}
.msg.me{align-self:flex-end;max-width:85%;padding:9px 13px;border-radius:14px 14px 4px 14px;background:var(--accent);color:var(--on-accent)}
.msg.me p{margin:0;white-space:pre-wrap}
.msg.bot{padding:12px 14px;border:1px solid var(--line);border-radius:14px 14px 14px 4px;background:var(--bg)}
.msg.bot.error{border-color:color-mix(in srgb,var(--warn) 45%,var(--line))}
.luma-log{position:relative}
.msg-head{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:12px}
.msg-head strong{font-size:12.5px}
.msg-tag{font-size:10.5px;padding:1px 7px;border-radius:999px;background:var(--surface);color:var(--muted)}
.msg h3{font-size:15px;margin:2px 0 6px}
.md p{margin:6px 0}
.md h4{font-size:13.5px;margin:12px 0 4px}
.md ul,.md ol{margin:6px 0;padding-left:20px}
.md li{margin:3px 0}
.md code,.msg code{font:12.5px var(--mono);padding:1px 5px;border-radius:5px;background:var(--surface)}
.inline-link{text-decoration:underline;text-underline-offset:3px}
.result-box{display:inline-block;margin:8px 8px 0 0;padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:var(--surface);font:600 15px/1.4 var(--mono)}
.conclusion{margin:10px 0 0}
.warning{display:flex;gap:8px;margin-top:8px;padding:8px 10px;border-left:3px solid var(--warn);background:color-mix(in srgb,var(--warn) 8%,transparent);border-radius:3px;font-size:13px}
.warning .svg{width:16px;height:16px;color:var(--warn)}
.working{margin-top:10px}
.working summary{list-style:none;display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);cursor:pointer}
.working summary::-webkit-details-marker{display:none}
.math-line,.math-row{font:13px/1.6 var(--mono);overflow-x:auto;white-space:pre}
.math-row{color:var(--muted)}
.work-steps{padding-left:20px;margin:8px 0 0;font-size:13px}
.work-steps p{margin:2px 0;color:var(--muted)}
.msg .chips{margin-top:10px;gap:6px}
.msg .chip{font-size:12px;padding:5px 10px}
.typing{display:inline-block;width:7px;height:7px;margin-right:4px;border-radius:50%;background:var(--muted);animation:dot 1s infinite}
.typing:nth-child(2){animation-delay:.15s}.typing:nth-child(3){animation-delay:.3s}
@keyframes dot{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.luma-form{padding:10px 12px 14px;border-top:1px solid var(--line)}
.luma-context{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin:0 2px 8px;cursor:pointer}
.luma-context b{color:var(--ink);font-weight:600}
.luma-input{display:flex;align-items:flex-end;gap:8px;padding:6px 6px 6px 12px;border-radius:12px;border:1px solid transparent;background:linear-gradient(var(--field),var(--field)) padding-box,var(--spectrum) border-box}
.luma-input textarea{flex:1;resize:none;border:0;background:transparent;outline:none;padding:7px 0;max-height:140px;line-height:1.45}

/* ------------------------------------------------------------ viewer */
.viewer{width:min(1400px,96vw);max-height:94vh;padding:0;border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--ink);overflow:hidden}
.viewer::backdrop{background:rgba(0,0,0,.72)}
.viewer-head{display:flex;align-items:center;gap:12px;padding:10px 10px 10px 16px;border-bottom:1px solid var(--line);font-size:13px}
#viewer-caption{flex:1}
#viewer-count{color:var(--muted)}
.viewer-stage{position:relative;display:grid;place-items:center;padding:16px;max-height:calc(94vh - 58px);overflow:auto;background:var(--bg)}
.viewer-stage img{max-width:100%;max-height:calc(94vh - 92px);border-radius:8px}
.viewer-nav{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;display:grid;place-items:center;border-radius:50%;border:1px solid var(--line);background:color-mix(in srgb,var(--panel) 88%,transparent)}
.viewer-nav:disabled{opacity:.3;cursor:default}
#viewer-prev{left:14px}#viewer-next{right:14px}
#tooltip{position:fixed;z-index:80;padding:5px 9px;border-radius:6px;background:var(--ink);color:var(--bg);font-size:12px;pointer-events:none}
.loading{color:var(--muted)}

/* ------------------------------------------------------------ responsive */
@media (max-width:1640px){.luma-open .article-layout{grid-template-columns:minmax(0,1fr)}.luma-open .rail{display:none}.luma-open .path{grid-template-columns:repeat(2,1fr)}}
@media (max-width:1180px){.article-layout{grid-template-columns:minmax(0,1fr)}.rail{display:none}.path{grid-template-columns:repeat(2,1fr)}}
@media (max-width:1100px){.luma-open .workspace{grid-template-columns:var(--side) 1fr}}
@media (max-width:900px){
  :root{--luma:100vw}
  .menu-button{display:inline-grid}
  .brand{min-width:0}.brand small{display:none}
  .workspace,.luma-open .workspace{grid-template-columns:1fr}
  .sidebar{position:fixed;top:var(--top);left:0;bottom:0;width:min(320px,86vw);z-index:40;transform:translateX(-100%);transition:transform .28s var(--ease);visibility:hidden}
  .menu-open .sidebar{transform:none;visibility:visible}
  .search-trigger kbd,.search-trigger span{display:none}
  .search-trigger{flex:0 0 38px;width:38px;padding:0;justify-content:center}
  .luma-trigger span,.tool-link span{display:none}
  .luma-trigger,.tool-link{padding:0 10px}
  .page{padding:24px 18px 56px}
  .home-hero{padding:28px 20px}
  .home-hero h1{font-size:30px}
  .article-head h1{font-size:27px}
  .help-row{grid-template-columns:1fr}
  .control{grid-template-columns:1fr}.control dd{padding-top:0}
}
@media (max-width:560px){.path{grid-template-columns:1fr}.pager{grid-template-columns:1fr}.hero-search span{font-size:14px}.topic-grid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.topbar,.sidebar,.rail,.pager,.luma,.ask-inline{display:none!important}body{overflow:visible}.app,.workspace{display:block}main{overflow:visible}}