:root{color-scheme:dark;
  --bg:#0b0d0e;--text:#f5f5f7;--text2:#a1a1a6;--text3:#86868c;
  --accent:#3aa39e;--accent-strong:#2a7e7a;--accent-dim:rgba(58,163,158,.14);
  --glass:rgba(255,255,255,.055);--glass-border:rgba(255,255,255,.09);
  --hair:rgba(255,255,255,.08);--fill:rgba(255,255,255,.03);
  --hover:rgba(255,255,255,.07);--hover-border:rgba(255,255,255,.16);--switch-off:rgba(255,255,255,.18);
  --good:#30d158;--good-dim:rgba(48,209,88,.16);--bad:#ff453a;--bad-dim:rgba(255,69,58,.14);
  --amber:rgba(255,214,10,.24);--radius:18px}
*{margin:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
/* Held for one frame while data-theme flips, so the whole page swaps at once
   instead of cross-fading every transitioned surface independently. */
.theme-switching,.theme-switching *{transition:none!important}
/* one visible keyboard focus ring for everything; several components reset
   outline:0 and previously left nothing in its place */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
figure img[tabindex]{cursor:zoom-in}
.no-results{padding:1rem 1.2rem;color:var(--text2);font-size:.92rem}
body{background:var(--bg);color:var(--text);font:100%/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.toolbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:1.5rem;
  padding:.8rem clamp(1rem,4vw,3rem);
  background:rgba(11,13,14,.65);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%)}
.toolbar::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.12),transparent)}
.toolbar .wordmark{display:flex;align-items:center;line-height:1;flex-shrink:0}
.toolbar .wordmark img{display:block;height:1.15rem;width:auto}
.toolbar .wordmark .logo-light{display:none}
:root[data-theme="light"] .toolbar .wordmark .logo-dark{display:none}
:root[data-theme="light"] .toolbar .wordmark .logo-light{display:block}
.toolbar nav{margin-left:auto;display:flex;align-items:center;gap:1.4rem;font-size:.92rem}
.toolbar nav a{display:flex;align-items:center;flex-shrink:0;white-space:nowrap;line-height:1;color:var(--text2)}
.toolbar nav a:hover{color:var(--text);text-decoration:none}
/* the light-theme ".logo-light{display:block}" rule outranks a bare
   ".logo-icon{display:none}", which showed the icon next to the full
   lockup in light mode above the phone breakpoint */
.toolbar .wordmark .logo-icon,
:root[data-theme="light"] .toolbar .wordmark .logo-icon{display:none}
/* Phone toolbar: the full lockup plus five nav items overruns 375px and clips
   "Log in", so below 480px the wordmark drops to the square icon and the hit
   areas grow to 44px. */
@media(max-width:480px){
  .toolbar{gap:.6rem;padding:.45rem .85rem}
  .toolbar nav{gap:.35rem;font-size:.85rem}
  .toolbar .wordmark .logo-full{display:none!important}
  .toolbar .wordmark .logo-dark.logo-icon{display:block}
  :root[data-theme="light"] .toolbar .wordmark .logo-dark.logo-icon{display:none}
  :root[data-theme="light"] .toolbar .wordmark .logo-light.logo-icon{display:block}
  .toolbar .wordmark img{height:1.5rem}
  .toolbar .wordmark{min-height:44px;align-items:center}
  .toolbar nav a{min-height:44px;padding:0 .35rem}
  .toolbar nav button.icon-btn{min-width:44px;min-height:44px;padding:.4rem}
}
@media(max-width:360px){
  .toolbar{gap:.35rem;padding-left:.6rem;padding-right:.6rem}
  .toolbar nav{gap:.1rem;font-size:.8rem}
  .toolbar nav a{padding:0 .2rem}
  .toolbar nav button.icon-btn{min-width:40px}
}
.wrap{max-width:1100px;margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}
/* Keyboard users land on the toolbar first; this lets them jump the nav on
   every page. Off-screen until focused, then pinned to the top-left. */
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;
  padding:.7rem 1.1rem;border-radius:0 0 10px 0;background:var(--accent);
  color:#fff;font-weight:600;text-decoration:none}
.skip-link:focus{left:0}
#main{scroll-margin-top:5rem}
#main:focus{outline:none}

.hero{position:relative;padding:clamp(5rem,12vh,9rem) 0 clamp(4rem,10vh,7rem);overflow:hidden}
:root{--wave-opacity:.2}
:root[data-theme="light"]{--wave-opacity:.13}
.hero .wave{position:absolute;inset:0;background:url(hero.jpg) center/cover no-repeat;
  opacity:var(--wave-opacity);filter:sepia(1) hue-rotate(120deg) saturate(1.9);
  mask-image:linear-gradient(to bottom,transparent,black 30%,black 70%,transparent);
  -webkit-mask-image:linear-gradient(to bottom,transparent,black 30%,black 70%,transparent);pointer-events:none}
.hero h1{font-size:clamp(2.5rem,6vw,4.5rem);line-height:1.05;letter-spacing:-.02em;font-weight:700;max-width:18ch}
.hero p.sub{margin-top:1.4rem;font-size:clamp(.8rem,2vw,1rem);color:var(--text2);white-space:nowrap}
@media(max-width:640px){.hero p.sub{white-space:normal;max-width:32ch;font-size:.95rem}}
.hero .meta{margin-top:1rem;font-size:.95rem;color:var(--text3);letter-spacing:.01em}
.cta{margin-top:2.4rem;display:flex;gap:.9rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.75rem 1.5rem;border-radius:999px;font-weight:600;font-size:1rem;
  border:0;cursor:pointer;font-family:inherit;
  transition:transform .18s cubic-bezier(.32,.72,0,1),background .18s}
.btn:active{transform:scale(.97)}
.btn.fill{background:var(--accent-strong);color:#fff}
.btn.fill:hover{background:var(--accent);text-decoration:none}
.btn.tint{background:var(--accent-dim);color:var(--accent)}
.btn.tint:hover{text-decoration:none;background:rgba(58,163,158,.22)}
.btn.ghost{background:transparent;color:var(--text2);border:1px solid var(--glass-border)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem;margin:2.5rem 0 6rem}
.grid.src-grid{margin:1rem 0 3rem}
.src-group-title{font-size:1.3rem;font-weight:700;letter-spacing:-.01em;margin:2rem 0 0}
.card{position:relative;display:block;padding:1.4rem 1.4rem 1.2rem;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--glass-border);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:transform .18s cubic-bezier(.32,.72,0,1),background .18s,border-color .18s;color:var(--text)}
.card:hover{background:var(--hover);border-color:var(--hover-border);text-decoration:none;transform:translateY(-2px)}
.card:active{transform:scale(.97)}
.card .glyph{display:inline-flex;align-items:center;justify-content:center;min-width:2.4rem;height:2.4rem;padding:0 .4rem;
  border-radius:10px;background:var(--accent-dim);color:var(--accent);font-weight:700;font-size:.85rem;
  letter-spacing:.03em;margin-bottom:.9rem}
.card h3{font-size:1.06rem;font-weight:600;letter-spacing:-.01em;line-height:1.3}
.card .count{margin-top:.35rem;font-size:.85rem;color:var(--text3)}
.section-title{font-size:clamp(1.6rem,3vw,2.2rem);letter-spacing:-.015em;font-weight:700;margin-top:5rem}
/* ---------- annotations ---------- */
:root{--anno-amber:rgba(255,214,10,.30);--anno-green:rgba(48,209,88,.26);
  --anno-blue:rgba(10,132,255,.30);--anno-pink:rgba(255,55,95,.26)}
:root[data-theme="light"]{--anno-amber:rgba(255,204,0,.55);--anno-green:rgba(52,199,89,.38);
  --anno-blue:rgba(0,122,255,.26);--anno-pink:rgba(255,45,85,.24)}
mark.anno{background:none;color:inherit;border-radius:2px;cursor:pointer}
mark.anno:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
mark.anno-highlight.anno-c-amber{background:var(--anno-amber)}
mark.anno-highlight.anno-c-green{background:var(--anno-green)}
mark.anno-highlight.anno-c-blue{background:var(--anno-blue)}
mark.anno-highlight.anno-c-pink{background:var(--anno-pink)}
mark.anno-underline{border-bottom:2px solid var(--accent)}
mark.anno-strike{text-decoration:line-through;text-decoration-thickness:2px;color:var(--text3)}
mark.anno-note{border-bottom:2px dotted var(--accent)}
mark.anno .anno-flag{font-size:.7em;vertical-align:super;color:var(--accent);margin-left:.1em}
mark.anno.anno-ping{animation:annoPing 1.2s ease}
@keyframes annoPing{0%,100%{box-shadow:none}30%{box-shadow:0 0 0 4px var(--accent-dim)}}
/* the toggle strips every mark back to plain prose without unloading them */
.annos-off mark.anno{background:none!important;border-bottom:0!important;
  text-decoration:none!important;color:inherit!important;cursor:auto}
.annos-off mark.anno .anno-flag{display:none}
/* the marks switch is built to the same pill as the UK toggle beside it */
.anno-count:not(:empty){display:inline-flex;align-items:center;justify-content:center;
  min-width:1.35rem;height:1.35rem;padding:0 .4rem;margin-left:.45rem;border-radius:999px;
  background:var(--accent);color:var(--bg);font-size:.72rem;font-weight:700}
/* an action, not another section link: tinted pill, accent text, its own icon */
/* its own softer tint, and the darker accent for the label in light mode:
   --accent on --accent-dim measured 4.41:1 there, just under AA */
.rail-action{display:flex;align-items:center;gap:.5rem;width:100%;text-align:left;cursor:pointer;
  font:inherit;font-weight:600;letter-spacing:-.005em;border-radius:12px;
  background:rgba(58,163,158,.09);color:var(--accent);border:1px solid rgba(58,163,158,.32);
  transition:background .15s,color .15s}
:root[data-theme="light"] .rail-action{background:rgba(32,105,101,.08);color:var(--accent-strong)}
.rail-action:hover{background:var(--accent);color:var(--bg);border-color:var(--accent)}
.rail-action .ra-icon{width:1rem;height:1rem;flex-shrink:0}
.rail-action .ra-label{flex:1 1 auto}
.rail .rail-action{margin-bottom:1rem;padding:.55rem .7rem;font-size:.82rem}
#rail-drawer .rd-top .rail-action{padding:.7rem .85rem;font-size:.95rem}
:root[data-theme="light"] .rail-action{border-color:rgba(32,105,101,.34)}
/* drawer top row: the entry and the close button share one line */
#rail-drawer .rd-top{display:flex;align-items:center;gap:.6rem;flex-shrink:0;padding:.85rem 1.1rem .6rem}
#rail-drawer .rd-top .rd-close{flex-shrink:0}
/* floating toolbar over the selection */
#anno-bar{position:absolute;z-index:130;display:none;align-items:center;gap:.3rem;
  padding:.35rem;border-radius:12px;background:var(--bg);border:1px solid var(--glass-border);
  box-shadow:0 10px 30px rgba(0,0,0,.4)}
#anno-bar.open{display:flex}
#anno-bar button{width:34px;height:34px;border-radius:8px;border:1px solid transparent;
  background:transparent;color:var(--text);cursor:pointer;font-size:.95rem;line-height:1;
  display:flex;align-items:center;justify-content:center}
#anno-bar button:hover{background:var(--hover)}
#anno-bar .anno-swatch{border:1px solid var(--glass-border)}
#anno-bar .anno-swatch.anno-c-amber{background:var(--anno-amber)}
#anno-bar .anno-swatch.anno-c-green{background:var(--anno-green)}
#anno-bar .anno-swatch.anno-c-blue{background:var(--anno-blue)}
#anno-bar .anno-swatch.anno-c-pink{background:var(--anno-pink)}
#anno-bar .anno-sep{width:1px;height:22px;background:var(--hair);margin:0 .15rem}
#anno-bar button[data-act="erase"]{color:var(--bad)}
/* Annotation mode: opt-in, off by default. One tool stays armed in a dock at
   the bottom, so a long read is marked up by selecting text rather than
   answering the floating bar every time. */
#anno-dock{position:fixed;left:0;right:0;bottom:0;z-index:135;display:none;justify-content:center;
  padding:0 .7rem calc(.7rem + env(safe-area-inset-bottom));pointer-events:none}
html.anno-mode #anno-dock{display:flex}
html.anno-mode body{padding-bottom:5.5rem}
#anno-dock .ad-in{display:flex;align-items:center;gap:.3rem;flex-wrap:wrap;justify-content:center;
  pointer-events:auto;max-width:100%;padding:.45rem .55rem;border-radius:14px;
  background:var(--bg);border:1px solid var(--glass-border);box-shadow:0 10px 30px rgba(0,0,0,.4)}
#anno-dock button{width:34px;height:34px;border-radius:8px;border:1px solid transparent;
  background:transparent;color:var(--text);cursor:pointer;font:inherit;font-size:.95rem;line-height:1;
  display:flex;align-items:center;justify-content:center}
#anno-dock button:hover{background:var(--hover)}
#anno-dock button[aria-pressed="true"]{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-dim)}
#anno-dock button[aria-pressed="true"]:not(.anno-swatch){background:var(--accent-dim)}
#anno-dock .anno-swatch{border:1px solid var(--glass-border)}
#anno-dock .anno-swatch.anno-c-amber{background:var(--anno-amber)}
#anno-dock .anno-swatch.anno-c-green{background:var(--anno-green)}
#anno-dock .anno-swatch.anno-c-blue{background:var(--anno-blue)}
#anno-dock .anno-swatch.anno-c-pink{background:var(--anno-pink)}
#anno-dock button[data-tool="erase"],#anno-dock .ad-wipe{color:var(--bad)}
#anno-dock .ad-sep{width:1px;height:22px;background:var(--hair);margin:0 .2rem}
#anno-dock .ad-text{width:auto;padding:0 .7rem;font-size:.85rem;color:var(--text2)}
#anno-dock .ad-hint{font-size:.8rem;color:var(--text3);padding:0 .5rem;white-space:nowrap}
@media(max-width:640px){#anno-dock .ad-hint{display:none}}
/* armed eraser: the marks it would take are the only thing it can point at */
html.anno-erase mark.anno{cursor:crosshair}
html.anno-erase mark.anno:hover{outline:2px solid var(--bad);outline-offset:1px}
/* notes panel */
#anno-panel{position:fixed;inset:0;z-index:140;display:none;background:rgba(0,0,0,.45)}
#anno-panel.open{display:block}
#anno-panel .ap-panel{position:absolute;top:0;right:0;bottom:0;width:min(380px,92vw);
  display:flex;flex-direction:column;background:var(--bg);border-left:1px solid var(--glass-border)}
#anno-panel .ap-head{display:flex;align-items:center;justify-content:space-between;
  padding:1rem 1.1rem;border-bottom:1px solid var(--hair);font-weight:600}
#anno-panel .ap-head .ap-title{flex:1 1 auto}
#anno-panel .ap-close{width:44px;height:44px;border:0;background:transparent;color:var(--text2);
  font-size:1.4rem;line-height:1;cursor:pointer;border-radius:10px}
#anno-panel .ap-export{display:inline-flex;align-items:center;gap:.35rem;padding:.35rem .6rem;
  border-radius:8px;cursor:pointer;font:inherit;font-size:.82rem;font-weight:600;
  border:1px solid var(--glass-border);background:transparent;color:var(--text2)}
#anno-panel .ap-export:hover:not(:disabled){background:var(--hover);color:var(--text)}
#anno-panel .ap-export:disabled{opacity:.4;cursor:default}
#anno-panel .ap-export svg{width:.95rem;height:.95rem}
#anno-panel .ap-filters{display:flex;gap:.4rem;flex-wrap:wrap;padding:.8rem 1.1rem;
  border-bottom:1px solid var(--hair)}
#anno-panel .ap-f{min-width:34px;height:30px;padding:0 .6rem;border-radius:999px;cursor:pointer;
  border:1px solid var(--glass-border);background:transparent;color:var(--text2);font-size:.82rem}
#anno-panel .ap-f.on{border-color:var(--accent);color:var(--accent)}
#anno-panel .ap-f.anno-c-amber{background:var(--anno-amber)}
#anno-panel .ap-f.anno-c-green{background:var(--anno-green)}
#anno-panel .ap-f.anno-c-blue{background:var(--anno-blue)}
#anno-panel .ap-f.anno-c-pink{background:var(--anno-pink)}
#anno-panel .ap-list{overflow-y:auto;padding:.6rem 1.1rem 2rem}
#anno-panel .ap-empty{color:var(--text2);font-size:.92rem;padding:1rem 0}
#anno-panel .ap-item{padding:.9rem 0;border-bottom:1px solid var(--hair);cursor:pointer}
#anno-panel .ap-item.ap-lost{opacity:.6}
#anno-panel .ap-meta{font-size:.78rem;color:var(--text2);text-transform:uppercase;
  letter-spacing:.05em;display:flex;align-items:center;gap:.4rem}
#anno-panel .ap-dot{width:.7rem;height:.7rem;border-radius:3px;background:var(--glass-border)}
#anno-panel .ap-dot.anno-c-amber{background:var(--anno-amber)}
#anno-panel .ap-dot.anno-c-green{background:var(--anno-green)}
#anno-panel .ap-dot.anno-c-blue{background:var(--anno-blue)}
#anno-panel .ap-dot.anno-c-pink{background:var(--anno-pink)}
#anno-panel blockquote{margin:.45rem 0 0;padding-left:.7rem;border-left:2px solid var(--accent);
  font-size:.92rem;color:var(--text)}
#anno-panel .ap-note{margin-top:.45rem;font-size:.9rem;color:var(--text2)}
#anno-panel .ap-actions{display:flex;gap:.5rem;margin-top:.6rem}
#anno-panel .ap-actions button{padding:.35rem .7rem;border-radius:8px;cursor:pointer;
  border:1px solid var(--glass-border);background:transparent;color:var(--text2);font-size:.8rem}
#anno-panel .ap-actions button:hover{background:var(--hover);color:var(--text)}
@media(prefers-reduced-motion:reduce){mark.anno.anno-ping{animation:none}}

/* ---------- scroll reveal ---------- */
/* Gated on .js-reveal, which app.js sets on <html>: without JS nothing is
   hidden, so the content never depends on the observer having run. */
.js-reveal .reveal{opacity:0;transform:translateY(14px);will-change:opacity,transform;
  transition:opacity .55s cubic-bezier(.32,.72,0,1),transform .55s cubic-bezier(.32,.72,0,1)}
.js-reveal .reveal.in{opacity:1;transform:none}
/* The hero is the counterpart: Sources arrives by rising into view, the hero
   leaves by rising out of it, photograph included.
   Tied to scroll position rather than run as a timed transition -- the hero
   clears the viewport in less than the 550ms a transition would take, so a
   timed fade finished off-screen and never actually read as a fade. Driving
   it from --hero-fade keeps it in step with the wheel at any speed. */
.js-reveal .hero .wrap{will-change:opacity,transform;
  opacity:calc(1 - var(--hero-fade,0));
  transform:translateY(calc(var(--hero-fade,0) * -28px))}
.js-reveal .hero .wave{will-change:opacity;
  opacity:calc(var(--wave-opacity) * (1 - var(--hero-fade,0)))}
/* the global reduced-motion rule kills the transition but not the start state,
   which would leave these permanently invisible -- so reset them here */
@media(prefers-reduced-motion:reduce){
  .js-reveal .reveal,.js-reveal .reveal.in,
  .js-reveal .hero .wrap{opacity:1;transform:none}
  .js-reveal .hero .wave{opacity:var(--wave-opacity)}
}
.section-sub{color:var(--text2);margin-top:.5rem;max-width:60ch}
footer{border-top:1px solid var(--hair);margin-top:4rem;padding:3rem 0 4rem;color:var(--text3);font-size:.9rem}
/* The disclaimer is the one piece of the footer that has to be read, so it is
   set at body size; the meta line under it stays small. Both run the full
   width of the page container. */
footer .foot-note{margin:0 0 1.2rem;color:var(--text2);font-size:.95rem;line-height:1.6}
footer .foot-note strong{color:var(--text)}
footer .foot-meta{margin:0;font-size:.85rem}
footer .foot-meta a{color:var(--text2);text-decoration:underline;text-underline-offset:2px}
footer .foot-meta a:hover{color:var(--accent)}
/* Full-text results sit under the title matches, visually subordinate to
   them: a label, then the topic, the section it was found in, and the
   matching phrase in context. */
.ft-head{padding:.75rem 1.1rem .3rem;font-size:.72rem;letter-spacing:.09em;
  text-transform:uppercase;color:var(--text3);border-top:1px solid var(--hair);margin-top:.4rem}
a.ft{display:block;padding:.55rem 1.1rem .7rem}
a.ft small{display:inline;margin-left:.5rem;color:var(--text3)}
.ft-snip{display:block;margin-top:.25rem;font-size:.85rem;line-height:1.5;
  color:var(--text3);overflow:hidden;text-overflow:ellipsis;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.ft-snip mark{background:var(--accent-dim);color:var(--text);padding:0 .12em;border-radius:2px}

.no-results{color:var(--text3);margin-top:1.5rem}
/* Library: search box above the category grid dims any card whose specialty
   has no matching topic, while the shared hero-search dropdown (see
   .hero-search / .hero-search-results) lists direct topic matches. */
.library-search{margin:1.6rem 0 2.2rem}
.grid .card.dim{opacity:.3;pointer-events:none}
@media(prefers-reduced-motion:no-preference){.grid .card{transition:opacity .15s}}
.library-sub{max-width:none}

.about .lede{font-size:1.12rem;line-height:1.65;color:var(--text2)}
.about h2{margin-top:2.4rem}
/* Short title and full title are two cells, not one wrapped line: setting the
   short title to display:block used to push the full title onto its own line
   still carrying the separator, so every row began with a stray dash. */
.about .src-list{list-style:none;padding:0;margin:1rem 0 0;border-top:1px solid var(--hair)}
/* article ul > li draws its own square bullet in a ::before, which list-style
   cannot switch off and which does not track a grid row. These rows are a
   table of sources, not a bulleted list, so drop it. */
.about .src-list li::before{content:none;display:none}
.about .src-list li{display:grid;gap:.15rem .9rem;padding:.7rem 0;
  border-bottom:1px solid var(--hair);color:var(--text2)}
@media(min-width:720px){.about .src-list li{grid-template-columns:14rem minmax(0,1fr);align-items:baseline}}
.about .src-list strong{color:var(--text);font-size:.95rem}
/* ---------- article pages ---------- */
.page{display:grid;grid-template-columns:minmax(0,1fr);gap:3rem;padding-top:3rem}
@media(min-width:980px){.page.with-rail{grid-template-columns:minmax(0,1fr) 220px}}
.crumbs{font-size:.88rem;color:var(--text3);margin-bottom:1.2rem}
.crumbs a{color:var(--text3)}
.crumbs a:hover{color:var(--accent)}
article h1{font-size:clamp(2rem,4.5vw,3rem);letter-spacing:-.02em;line-height:1.1;font-weight:700;margin-bottom:1.5rem}
article h2{font-size:1.45rem;letter-spacing:-.012em;font-weight:650;margin:2.8rem 0 .9rem;padding-top:.5rem}
article h3{font-size:1.15rem;font-weight:600;margin:2.2rem 0 .7rem}
article p{margin:.9rem 0;color:#d6d6db;font-size:1.0625rem}
article ul{list-style:none;margin:.9rem 0;padding-left:0;color:#d6d6db;font-size:1.0625rem}
article ul > li{position:relative;margin:.5rem 0;padding-left:1.05rem}
article ul > li::before{content:"";position:absolute;left:0;top:.66em;width:5px;height:5px;
  border-radius:50%;background:var(--accent)}
article ul.facts li::before{border-radius:1px;transform:rotate(45deg)}
article em{color:var(--text)}
article u{text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:3px;color:var(--text)}
article mark{background:var(--amber);color:var(--text);border-radius:4px;padding:0 .15em}
article .key{color:var(--accent);font-weight:600}
article strong{color:var(--text)}
a.ref{color:var(--accent);font-size:.8em;vertical-align:super;line-height:0;text-decoration:none;font-weight:600}
.cite{color:var(--text3);font-size:.82em;letter-spacing:.01em}
figure{margin:1.6rem 0;border-radius:var(--radius);overflow:hidden;background:var(--glass);border:1px solid var(--glass-border)}
figure img{display:block;max-width:100%;margin:0 auto}
figure:not(.diagram) img{cursor:zoom-in}
figcaption{padding:.7rem 1rem;font-size:.85rem;color:var(--text2)}
/* inline SVG diagrams: inherit the page palette, scale to the column */
figure.diagram{background:transparent}
figure.diagram > svg{display:block;width:100%;height:auto;background:transparent}
figure.diagram .d-fill{fill:var(--glass)}
figure.diagram .d-stroke{stroke:var(--accent-strong);fill:none}
figure.diagram .d-line{stroke:var(--accent);fill:none}
figure.diagram .d-txt{fill:var(--text)}
figure.diagram .d-sub{fill:var(--text2)}
figure.diagram .d-dim{fill:var(--text3)}
figure.diagram .d-accent{fill:var(--accent)}
figure.diagram .d-chip{fill:var(--accent-dim)}
figure.diagram .d-warn{fill:#ff9f0a}
figure.diagram .d-warn-bg{fill:rgba(255,159,10,.12);stroke:rgba(255,159,10,.55)}
figure.diagram .d-good{fill:var(--good)}
figure.diagram .d-good-bg{fill:var(--good-dim);stroke:rgba(48,209,88,.5)}
figure.diagram .d-lane{fill:rgba(127,127,127,.07);stroke:var(--glass-border)}
/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;margin:1.5rem 0;border-radius:14px;border:1px solid var(--glass-border)}
article table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px}
article thead th{background:var(--glass);color:var(--text);text-align:left;font-weight:650;
  padding:.7rem .9rem;border-bottom:1px solid var(--glass-border);white-space:nowrap}
article td{padding:.65rem .9rem;border-bottom:1px solid var(--hair);color:#d6d6db;vertical-align:top}
article tr:last-child td{border-bottom:0}
:root[data-theme="light"] article td{color:#3a3a3c}
/* ---------- title row + UK guidelines toggle ---------- */
.title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:1.5rem;flex-wrap:wrap}
.title-row h1{margin-bottom:0;flex:1 1 auto}
/* every article-level control shares this row so they align to one baseline */
.title-tools{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;flex-shrink:0;margin-top:.5rem}
.title-tools:empty{display:none}
.uk-toggle{display:inline-flex;align-items:center;gap:.65rem;flex-shrink:0;
  padding:.5rem .9rem;border-radius:999px;background:var(--accent-dim);
  border:1px solid rgba(58,163,158,.3);font-size:.82rem;color:var(--text2);cursor:pointer;
  white-space:nowrap;user-select:none}
.uk-toggle:hover{color:var(--text)}
@media(max-width:600px){.title-row{gap:.9rem}.title-tools{margin-top:0}}
.switch{position:relative;display:inline-block;width:2.3rem;height:1.32rem;flex-shrink:0}
.switch input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.switch .slider{position:absolute;inset:0;background:var(--switch-off);border-radius:999px;
  transition:background .18s;pointer-events:none}
.switch .slider::before{content:"";position:absolute;width:1rem;height:1rem;left:.16rem;top:.16rem;
  background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.3);border-radius:50%;transition:transform .18s}
.switch input:checked + .slider{background:var(--accent)}
.switch input:checked + .slider::before{transform:translateX(.98rem)}
.switch input:focus-visible + .slider{outline:2px solid var(--accent);outline-offset:2px}
/* UK guideline notes, woven inline through the article body */
.uk-note{margin:1.4rem 0;padding:1.1rem 1.3rem .9rem;border-radius:14px;
  background:rgba(58,163,158,.07);border:1px solid rgba(58,163,158,.28);
  border-left:3px solid var(--accent)}
.uk-note > :first-child{margin-top:0}
.uk-note > :last-child{margin-bottom:0}
.uk-note .uk-label{display:inline-block;font-size:.66rem;letter-spacing:.07em;text-transform:uppercase;
  font-weight:700;color:var(--accent);background:var(--accent-dim);padding:.25rem .65rem;
  border-radius:999px;margin-bottom:.7rem}
.uk-note p,.uk-note ul{font-size:1.0125rem}
.uk-note .table-wrap{margin:1rem 0}
:root.hide-uk .uk-note{display:none}
.refs{margin-top:3.5rem;padding-top:1.5rem;border-top:1px solid var(--hair)}
.refs h2{font-size:1.2rem;margin:0 0 .8rem}
.refs ol{margin-left:1.4rem;color:var(--text2);font-size:.92rem}
.refs li{margin:.3rem 0}
.refs .ref-link{font-size:.86em;color:var(--accent);white-space:nowrap}
.refs .ref-link::before{content:"↗ ";font-size:.9em}
.topic-actions{margin:3rem 0 1rem;display:flex;gap:.8rem;flex-wrap:wrap}
.rail{position:sticky;top:5rem;align-self:start;font-size:.85rem;display:none}
@media(min-width:980px){.rail{display:block}}
.rail a{display:block;color:var(--text3);padding:.28rem .8rem;border-left:2px solid var(--hair);
  transition:color .15s,border-color .15s}
.rail a:hover{color:var(--text);text-decoration:none}
.rail a.on{color:var(--accent);border-color:var(--accent)}
/* the sticky toolbar would otherwise sit on top of a jumped-to heading */
article h2[id],article h3[id]{scroll-margin-top:4.5rem}
/* ---------- mobile section drawer (stands in for the hidden rail) ---------- */
#rail-fab{position:fixed;right:1rem;bottom:1rem;z-index:80;width:3rem;height:3rem;border-radius:999px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text);
  background:var(--bg);border:1px solid var(--glass-border);box-shadow:0 8px 24px rgba(0,0,0,.35)}
#rail-fab svg{width:1.25rem;height:1.25rem;display:block}
#rail-drawer{position:fixed;inset:0;z-index:120;display:none;background:rgba(0,0,0,.45)}
#rail-drawer.open{display:block}
#rail-drawer .rd-panel{position:absolute;top:0;right:0;bottom:0;width:min(300px,84vw);
  display:flex;flex-direction:column;background:var(--bg);border-left:1px solid var(--glass-border);
  transform:translateX(100%);transition:transform .22s cubic-bezier(.32,.72,0,1)}
#rail-drawer.open .rd-panel{transform:translateX(0)}
#rail-drawer .rd-head{padding:.2rem 1.1rem .7rem;border-bottom:1px solid var(--hair);
  font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text3)}
#rail-drawer .rd-close{width:44px;height:44px;border:0;background:transparent;color:var(--text2);
  font-size:1.4rem;line-height:1;cursor:pointer;border-radius:10px}
#rail-drawer .rd-links{overflow-y:auto;padding:.5rem 0 1.5rem}
#rail-drawer .rd-links a{display:block;padding:.85rem 1.1rem;color:var(--text2);
  border-left:3px solid transparent;font-size:.95rem}
#rail-drawer .rd-links a:hover{text-decoration:none;background:var(--hover)}
#rail-drawer .rd-links a.on{color:var(--accent);border-left-color:var(--accent);font-weight:600}
@media(min-width:980px){#rail-fab,#rail-drawer{display:none!important}}
@media(prefers-reduced-motion:reduce){#rail-drawer .rd-panel{transition:none}}
.topic-list{list-style:none;margin:2rem 0 4rem;padding:0}
.topic-list li{margin:0}
.topic-list a{display:flex;justify-content:space-between;align-items:center;padding:1.05rem .4rem;
  border-bottom:1px solid var(--hair);color:var(--text);font-size:1.05rem;font-weight:550}
.topic-list a:hover{color:var(--accent);text-decoration:none}
.topic-list a::after{content:"\203A";color:var(--text3);font-size:1.2rem}
/* ---------- quiz ---------- */
.quiz-head{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin:2.2rem 0 1.4rem}
.quiz-head .progress{color:var(--text2);font-size:.95rem}
.quiz-head .timer{margin-left:auto;font:600 1.1rem ui-monospace,monospace;color:var(--accent)}
.quiz-head .timer.low{color:var(--bad)}
.dots{display:flex;gap:.35rem;flex-wrap:wrap;margin-bottom:1.6rem}
@media(max-width:600px){.dots button{width:2.75rem!important;height:2.75rem!important}}
.dots button{width:1.7rem;height:1.7rem;border-radius:7px;border:1px solid var(--glass-border);
  background:var(--glass);color:var(--text3);font-size:.72rem;cursor:pointer;position:relative}
.dots button.cur{border-color:var(--accent);color:var(--accent)}
.dots button.done{background:var(--accent-dim);color:var(--accent)}
.dots button.flagged::after{content:"";position:absolute;top:-3px;right:-3px;width:8px;height:8px;
  border-radius:50%;background:#ffd60a}
.qcard{padding:1.8rem;border-radius:var(--radius);background:var(--glass);border:1px solid var(--glass-border)}
.qcard .qtopic{font-size:.82rem;color:var(--accent);letter-spacing:.04em;text-transform:uppercase;margin-bottom:.7rem}
.qcard .stem{font-size:1.12rem;line-height:1.55;margin-bottom:1.3rem}
.opt{display:block;width:100%;text-align:left;padding:.85rem 1.1rem;margin:.5rem 0;border-radius:12px;
  border:1px solid var(--glass-border);background:var(--fill);color:var(--text);
  font:inherit;font-size:1rem;cursor:pointer;transition:background .15s,border-color .15s,transform .12s}
.opt:hover{background:var(--hover)}
.opt .opt-tag{display:block;margin-top:.35rem;font-size:.72rem;font-weight:700;
  letter-spacing:.06em;text-transform:uppercase}
.opt.good .opt-tag{color:var(--good)}
.opt.bad .opt-tag{color:var(--bad)}
.qverdict{margin:1rem 0 .2rem;font-weight:600}
.qverdict.ok{color:var(--good)}
.qverdict.no{color:var(--bad)}
.opt:active{transform:scale(.99)}
.opt.sel{border-color:var(--accent);background:var(--accent-dim)}
.opt.good{border-color:var(--good);background:var(--good-dim)}
.opt.bad{border-color:var(--bad);background:var(--bad-dim)}
.opt[disabled]{cursor:default;opacity:.9}
.qmeta{margin-top:1rem;font-size:.85rem;color:var(--text3)}
.quiz-nav{display:flex;gap:.8rem;margin-top:1.6rem;flex-wrap:wrap}
.quiz-nav .spacer{flex:1}
.flag-btn.on{background:rgba(255,214,10,.18);color:#ffd60a}
.result-sum{padding:1.8rem;border-radius:var(--radius);background:var(--glass);
  border:1px solid var(--glass-border);margin-bottom:2rem;font-size:1.1rem}
.result-sum .score{font-size:2.4rem;font-weight:700;letter-spacing:-.02em}
.result-q{padding:1.4rem 1.6rem;border-radius:var(--radius);border:1px solid var(--glass-border);margin:1rem 0}
.result-q.ok{border-color:rgba(48,209,88,.4)}
.result-q.wrong{border-color:rgba(255,69,58,.4)}
.result-q .stem{margin-bottom:.8rem}
.result-q .expl{margin-top:.8rem;font-size:.92rem;color:var(--text2)}
.pill{display:inline-block;padding:.15rem .6rem;border-radius:999px;font-size:.78rem;font-weight:600;margin-bottom:.6rem}
.pill.ok{background:var(--good-dim);color:var(--good)}
.pill.wrong{background:var(--bad-dim);color:var(--bad)}
.pill.skip{background:var(--hair);color:var(--text3)}
/* ---------- search palette ---------- */
#palette{position:fixed;inset:0;z-index:100;display:none;align-items:flex-start;justify-content:center;
  padding-top:14vh;background:rgba(0,0,0,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
#palette.open{display:flex}
#palette .box{width:min(560px,92vw);border-radius:16px;overflow:hidden;
  background:rgba(28,30,32,.92);border:1px solid rgba(255,255,255,.12);
  backdrop-filter:blur(30px) saturate(160%);-webkit-backdrop-filter:blur(30px) saturate(160%);
  box-shadow:0 24px 70px rgba(0,0,0,.55)}
#palette input{width:100%;padding:1rem 1.2rem;font-size:1.05rem;background:transparent;border:0;outline:0;color:var(--text)}
#palette .results{max-height:46vh;overflow:auto;border-top:1px solid var(--hair)}
#palette .results a{display:block;padding:.7rem 1.2rem;color:var(--text)}
#palette .results a small{color:var(--text3);margin-left:.5rem}
#palette .results a:hover,#palette .results a.sel{background:var(--accent-dim);text-decoration:none}
.kbd{font:0.78rem ui-monospace,monospace;color:var(--text3);border:1px solid var(--glass-border);
  border-radius:5px;padding:.1rem .35rem;margin-left:.3rem}
/* ---------- light theme ---------- */
:root[data-theme="light"]{color-scheme:light;
  --bg:#f5f5f7;--text:#1d1d1f;--text2:#48484a;--text3:#66666b;
  /* accent is dark enough to clear 4.5:1 on the page ground AND on every
     accent-dim tint it sits on (buttons, glyphs, uk-label) */
  --accent:#206965;--accent-strong:#17514e;--accent-dim:rgba(32,105,101,.12);
  --glass:rgba(0,0,0,.035);--glass-border:rgba(0,0,0,.1);
  --hair:rgba(0,0,0,.1);--fill:rgba(0,0,0,.03);
  --hover:rgba(0,0,0,.05);--hover-border:rgba(0,0,0,.2);--switch-off:rgba(0,0,0,.22);
  /* #248a3d gave only 4.04:1 against the light page background, below the WCAG
     AA 4.5:1 minimum for the "Correct" verdict text and the "Correct answer"
     tag. #19662f measures 6.5:1. The dim fill is unchanged. */
  --good:#19662f;--good-dim:rgba(36,138,61,.14);--bad:#d70015;--bad-dim:rgba(215,0,21,.1);
  --amber:rgba(255,179,0,.28)}
:root[data-theme="light"] .toolbar{background:rgba(245,245,247,.75)}
:root[data-theme="light"] .toolbar::after{background:linear-gradient(90deg,transparent,rgba(0,0,0,.12),transparent)}
:root[data-theme="light"] article p,:root[data-theme="light"] article ul{color:#3a3a3c}
:root[data-theme="light"] #palette{background:rgba(0,0,0,.25)}
:root[data-theme="light"] #palette .box{background:rgba(255,255,255,.92);border-color:rgba(0,0,0,.12)}
:root[data-theme="light"] .hero-search-results{background:rgba(255,255,255,.95);border-color:rgba(0,0,0,.12)}
/* ---------- toolbar icon buttons ---------- */
.toolbar nav button.icon-btn{background:transparent;border:0;color:var(--text2);cursor:pointer;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;padding:.4rem;border-radius:8px;
  transition:background .15s,color .15s}
.toolbar nav button.icon-btn:hover{color:var(--text);background:var(--glass)}
.toolbar nav button.icon-btn svg{width:1.15rem;height:1.15rem;display:block}
#theme-toggle .i-moon{display:none}
:root[data-theme="light"] #theme-toggle .i-sun{display:none}
:root[data-theme="light"] #theme-toggle .i-moon{display:block}
/* ---------- centered hero + inline search ---------- */
.hero.centered{text-align:center}
.hero.centered .wrap{display:flex;flex-direction:column;align-items:center}
.hero.centered .sub,.hero.centered .meta{margin-left:auto;margin-right:auto}
.hero.centered .cta{justify-content:center}
/* The home page wordmark is the page's <h1>: it carries the site name, so it
   belongs in the heading outline for screen readers and search engines. Reset
   the .hero h1 type rules that would otherwise apply to it -- it holds images,
   not text. */
.logo-mark{display:block;width:min(90vw,720px);height:auto;
  margin:0;font-size:0;line-height:0;font-weight:inherit;letter-spacing:normal;max-width:none}
.logo-mark .logo-light{display:none}
:root[data-theme="light"] .logo-mark .logo-dark{display:none}
:root[data-theme="light"] .logo-mark .logo-light{display:block}
.hero-search{position:relative;width:min(480px,90vw);margin-top:2.2rem}
.hero-search input{width:100%;padding:.9rem 1.3rem;border-radius:999px;border:1px solid var(--glass-border);
  background:var(--glass);color:var(--text);font:inherit;font-size:1rem;outline:0}
.hero-search input:focus{border-color:var(--accent)}
.hero-search-results{position:absolute;left:0;right:0;top:calc(100% + .5rem);border-radius:14px;overflow:hidden;
  background:rgba(28,30,32,.92);border:1px solid rgba(255,255,255,.12);
  backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);
  text-align:left;display:none;max-height:50vh;overflow-y:auto;z-index:20}
.hero-search-results.open{display:block}
.hero-search-results a{display:block;padding:.7rem 1.1rem;color:var(--text)}
.hero-search-results a small{color:var(--text3);margin-left:.5rem}
.hero-search-results a:hover{background:var(--accent-dim);text-decoration:none}
/* ---------- profile: auth area, avatar, dropdown ---------- */
.auth-login-link{color:var(--text2);flex-shrink:0;white-space:nowrap}
.auth-login-link:hover{color:var(--text)}
.profile{position:relative;margin-left:.2rem;padding-left:1.2rem;border-left:1px solid var(--glass-border)}
.avatar-btn{width:2.15rem;height:2.15rem;border-radius:999px;background:var(--accent-dim);color:var(--accent);
  border:1px solid rgba(58,163,158,.35);font-weight:700;font-size:.82rem;display:flex;align-items:center;
  justify-content:center;cursor:pointer;font-family:inherit;padding:0}
.profile-menu{position:absolute;top:calc(100% + .7rem);right:0;width:236px;border-radius:14px;overflow:hidden;
  background:rgba(28,30,32,.96);border:1px solid rgba(255,255,255,.12);box-shadow:0 24px 60px rgba(0,0,0,.5);
  display:none;z-index:60}
:root[data-theme="light"] .profile-menu{background:rgba(255,255,255,.97);border-color:rgba(0,0,0,.12)}
.profile-menu.open{display:block}
.profile-menu .who{padding:1rem 1.1rem .9rem;border-bottom:1px solid var(--hair)}
.profile-menu .who .name{font-weight:650;font-size:.95rem;color:var(--text)}
.profile-menu .who .role{font-size:.8rem;color:var(--text3);margin-top:.15rem}
.profile-menu .items{padding:.4rem;border-bottom:1px solid var(--hair)}
.profile-menu a,.profile-menu button.menu-item{display:flex;align-items:center;gap:.65rem;width:100%;
  padding:.6rem .7rem;border-radius:9px;font-size:.88rem;color:var(--text2);background:transparent;border:0;
  cursor:pointer;font:inherit;text-align:left}
.profile-menu a:hover,.profile-menu button.menu-item:hover{background:var(--glass);text-decoration:none;color:var(--text)}
.profile-menu svg{width:1rem;height:1rem;flex-shrink:0}
.profile-menu .logout-item{padding:.4rem}
/* ---------- mark as read ---------- */
.btn.mark{background:transparent;color:var(--text2);border:1px solid var(--glass-border);display:inline-flex;
  align-items:center;gap:.5rem}
.btn.mark svg{width:15px;height:15px;flex-shrink:0}
.btn.mark.is-read{background:var(--good-dim);color:var(--good);border-color:transparent}
.save-nudge{margin-top:.6rem;font-size:.85rem;color:var(--text3)}
.save-nudge a{color:var(--accent)}
.read-badge{display:inline-flex;align-items:center;gap:.3rem;color:var(--good);font-size:.8rem;font-weight:650;
  margin-right:.6rem}
.read-badge svg{width:13px;height:13px}
.toast{position:fixed;bottom:1.4rem;left:50%;transform:translateX(-50%) translateY(0);background:rgba(28,30,32,.95);
  color:var(--text);border:1px solid var(--glass-border);border-radius:12px;padding:.7rem 1.1rem;font-size:.88rem;
  z-index:200;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-6px)}
/* ---------- login page ---------- */
.auth-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);
  padding:2rem;width:min(420px,100%);margin:2.6rem auto 0}
.auth-btn{display:flex;align-items:center;justify-content:center;gap:.6rem;width:100%;padding:.85rem 1.4rem;
  border-radius:999px;font-weight:600;font-size:.98rem;border:0;cursor:pointer;font-family:inherit}
.auth-btn.google{background:#fff;color:#1f1f1f;border:1px solid #dcdcdc}
.auth-btn.skip{background:transparent;color:var(--text2);font-size:.92rem;font-weight:500;padding:.6rem}
.auth-fine{margin-top:1.4rem;font-size:.78rem;line-height:1.55;color:var(--text3)}
.auth-divider{margin:1.4rem 0;border-top:1px solid var(--glass-border);padding-top:1.4rem}
.auth-state-label{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);
  font-weight:700;margin-bottom:.9rem}
.auth-field{margin-bottom:.85rem}
.auth-field label{display:block;font-size:.82rem;color:var(--text2);margin-bottom:.35rem}
.auth-field input{width:100%;padding:.7rem .9rem;border-radius:10px;border:1px solid var(--glass-border);
  background:var(--fill);color:var(--text);font:inherit;font-size:.95rem}
.auth-field input:focus{outline:0;border-color:var(--accent)}
.auth-error{color:var(--bad);font-size:.85rem;margin-top:.5rem;display:none}
.auth-error.show{display:block}
.auth-toggle-line{text-align:center;margin-top:1.1rem;font-size:.86rem;color:var(--text2)}
/* ---------- dashboard page ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin:2.2rem 0}
.stat{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1.3rem 1.4rem}
.stat .label{font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--text3);font-weight:600}
.stat .num{font-size:2rem;font-weight:700;letter-spacing:-.02em;margin-top:.5rem}
.stat .sub{font-size:.82rem;color:var(--text3);margin-top:.25rem}
.cat-list{border:1px solid var(--glass-border);border-radius:var(--radius);overflow:hidden}
.cat-row{display:grid;grid-template-columns:minmax(120px,180px) 1fr 80px 70px;align-items:center;gap:1rem;
  padding:.9rem 1.4rem;border-bottom:1px solid var(--glass-border)}
.cat-row:last-child{border-bottom:0}
.cat-row .name{font-weight:600;font-size:.95rem}
.bar-track{height:6px;border-radius:999px;background:var(--hair)}
.bar-fill{height:100%;border-radius:999px;background:var(--accent)}
.cat-row .frac{font-size:.82rem;color:var(--text3);text-align:right}
.chip{display:inline-block;padding:.2rem .6rem;border-radius:999px;font-size:.78rem;font-weight:650;text-align:center}
.chip.good{background:var(--good-dim);color:var(--good)}
.chip.amber{background:rgba(255,214,10,.16);color:#ffd60a}
.chip.bad{background:var(--bad-dim);color:var(--bad)}
.chip.none{background:var(--hair);color:var(--text3)}
.activity{border:1px solid var(--glass-border);border-radius:var(--radius);overflow:hidden}
.act-row{display:flex;align-items:center;gap:.9rem;padding:.85rem 1.4rem;border-bottom:1px solid var(--glass-border);
  font-size:.92rem}
.act-row:last-child{border-bottom:0}
.act-row .ico{width:1.6rem;height:1.6rem;border-radius:7px;display:flex;align-items:center;justify-content:center;
  flex-shrink:0}
.act-row .ico.read{background:var(--accent-dim);color:var(--accent)}
.act-row .ico.quiz{background:var(--good-dim);color:var(--good)}
.act-row .what{flex:1}
.act-row .when{color:var(--text3);font-size:.82rem}
.empty-note{color:var(--text3);font-size:.92rem;padding:1.2rem 0}
/* ---------- image zoom lightbox ---------- */
/* #img-lightbox is the only clipping boundary (full viewport, no padding), so a
   zoomed image is cropped only by the actual screen edge, never by an inner box */
#img-lightbox{position:fixed;inset:0;z-index:150;display:none;align-items:center;justify-content:center;
  overflow:hidden;background:rgba(0,0,0,.88);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  cursor:zoom-out;touch-action:none}
#img-lightbox.open{display:flex}
#img-lightbox .lb-frame{width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  transform:scale(.96);opacity:0;transition:transform .18s cubic-bezier(.32,.72,0,1),opacity .18s}
#img-lightbox.open .lb-frame{transform:scale(1);opacity:1}
#img-lightbox .lb-frame img{display:block;max-width:92vw;max-height:88vh;margin:auto;border-radius:10px;
  box-shadow:0 24px 70px rgba(0,0,0,.55);cursor:zoom-in;touch-action:none;user-select:none;
  transform-origin:center center}
#img-lightbox .lb-close{position:absolute;top:1.1rem;right:1.3rem;width:2.4rem;height:2.4rem;border-radius:999px;
  background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:1.3rem;line-height:1;z-index:2}
#img-lightbox .lb-close:hover{background:rgba(255,255,255,.2)}
/* caption: collapsed to one line by default; tap/click expands it over a blurred
   backdrop so it never overlaps unreadably with the zoomed image beneath it */
/* the scrim is black in both themes, so the caption cannot use --text2:
   in light mode that resolves to a dark grey and drops to 1.8:1 */
#img-lightbox .lb-cap{position:absolute;left:0;right:0;bottom:0;z-index:1;color:rgba(255,255,255,.75);
  font-size:.85rem;line-height:1.5;padding:.9rem 3.2rem .9rem 1.2rem;cursor:pointer;
  background:linear-gradient(to top,rgba(0,0,0,.8),transparent);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background .18s}
#img-lightbox .lb-cap.expanded{white-space:normal;text-overflow:clip;max-height:40vh;overflow-y:auto;
  padding-top:1.1rem;background:rgba(20,21,23,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid rgba(255,255,255,.1)}
#img-lightbox .lb-cap[hidden]{display:none}
@media(prefers-reduced-motion:reduce){#img-lightbox .lb-frame{transition:none}}

/* ---------- admin editor (admin.html) ---------- */
.admin-shell{display:grid;grid-template-columns:290px 1fr;gap:1.4rem;
  max-width:1500px;margin:0 auto;padding:1.4rem clamp(1rem,3vw,2rem) 3rem;
  min-height:calc(100vh - 62px)}
.admin-side{display:flex;flex-direction:column;gap:.7rem;min-width:0}
.admin-side .filter{width:100%;padding:.6rem .8rem;border-radius:10px;font-size:.9rem;
  background:var(--fill);border:1px solid var(--glass-border);color:var(--text)}
.admin-tabs{display:flex;gap:.3rem}
.admin-tabs button{flex:1;padding:.45rem .3rem;border-radius:9px;font:inherit;font-size:.82rem;font-weight:600;
  background:transparent;color:var(--text2);border:1px solid var(--glass-border);cursor:pointer}
.admin-tabs button.on{background:var(--accent-dim);color:var(--accent);border-color:transparent}
.doc-list{overflow-y:auto;max-height:calc(100vh - 210px);border:1px solid var(--hair);
  border-radius:14px;background:var(--fill)}
.doc-list .cat{padding:.5rem .8rem .3rem;font-size:.72rem;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--text3);position:sticky;top:0;background:var(--bg)}
.doc-list button.doc{display:flex;width:100%;gap:.5rem;align-items:baseline;text-align:left;
  padding:.42rem .8rem;font:inherit;font-size:.87rem;background:transparent;border:0;
  color:var(--text2);cursor:pointer;border-left:2px solid transparent}
.doc-list button.doc:hover{background:var(--hover);color:var(--text)}
.doc-list button.doc.on{background:var(--accent-dim);color:var(--text);border-left-color:var(--accent)}
.doc-list button.doc .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.doc-list button.doc .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0}
.doc-list button.doc .k{font-size:.68rem;color:var(--text3);text-transform:uppercase;letter-spacing:.04em}
.admin-main{min-width:0;display:flex;flex-direction:column;gap:.8rem}
.admin-bar{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.admin-bar h2{font-size:1.05rem;font-weight:650;letter-spacing:-.01em;margin-right:auto;
  min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.admin-bar .path{font:.76rem/1.2 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--text3);
  display:block;font-weight:400;margin-top:.15rem}
.abtn{padding:.42rem .85rem;border-radius:999px;font:inherit;font-size:.84rem;font-weight:600;
  background:transparent;color:var(--text2);border:1px solid var(--glass-border);cursor:pointer}
.abtn:hover:not(:disabled){color:var(--text);border-color:var(--hover-border)}
.abtn.primary{background:var(--accent-strong);color:#fff;border-color:transparent}
.abtn.primary:hover:not(:disabled){background:var(--accent)}
.abtn.danger{color:var(--bad);border-color:rgba(255,69,58,.35)}
.abtn:disabled{opacity:.45;cursor:default}
.abtn.on{background:var(--accent-dim);color:var(--accent);border-color:transparent}
.admin-status input{flex:1;min-width:12rem;padding:.38rem .7rem;border-radius:9px;font:inherit;font-size:.8rem;
  background:var(--fill);border:1px solid var(--glass-border);color:var(--text)}
.admin-editor{width:100%;min-height:56vh;resize:vertical;padding:1rem 1.1rem;border-radius:14px;
  background:var(--fill);border:1px solid var(--glass-border);color:var(--text);
  font:.86rem/1.65 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;tab-size:2;white-space:pre-wrap}
.admin-editor:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.admin-status{display:flex;flex-wrap:wrap;gap:.9rem;align-items:center;font-size:.8rem;color:var(--text3)}
.admin-status .dirty{color:var(--accent);font-weight:600}
.admin-checks{border:1px solid var(--hair);border-radius:14px;background:var(--fill);padding:.85rem 1rem;
  font-size:.84rem;display:flex;flex-direction:column;gap:.4rem}
.admin-checks .t{font-weight:650;color:var(--text2);font-size:.75rem;letter-spacing:.05em;text-transform:uppercase}
.admin-checks .ck{display:flex;gap:.5rem;align-items:flex-start;color:var(--text2)}
.admin-checks .ck.warn{color:#e0a800}
:root[data-theme="light"] .admin-checks .ck.warn{color:#8a6100}
.admin-checks .ck.bad{color:var(--bad)}
.admin-checks .ck.ok{color:var(--good)}
.admin-empty{padding:3rem 1rem;text-align:center;color:var(--text3)}
.admin-note{border:1px solid var(--glass-border);background:var(--glass);border-radius:14px;
  padding:.9rem 1.1rem;font-size:.86rem;color:var(--text2);line-height:1.6}
.admin-note code{font:.82em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--fill);
  padding:.12rem .4rem;border-radius:5px;color:var(--text)}
/* structured question editor */
.qedit{display:flex;flex-direction:column;gap:.9rem}
.qgroup-head{display:flex;gap:.5rem;align-items:center;margin-top:.6rem}
.qgroup-head input{flex:1;padding:.4rem .7rem;border-radius:9px;background:transparent;
  border:1px dashed var(--glass-border);color:var(--text);font:inherit;font-size:.95rem;font-weight:650}
.qcard{border:1px solid var(--hair);border-radius:14px;background:var(--fill);padding:.9rem 1rem;
  display:flex;flex-direction:column;gap:.55rem}
.qcard textarea,.qcard input[type=text]{width:100%;padding:.5rem .7rem;border-radius:9px;background:var(--bg);
  border:1px solid var(--glass-border);color:var(--text);font:inherit;font-size:.87rem;line-height:1.55}
.qcard textarea{resize:vertical;min-height:3.2rem}
.qcard .lbl{font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text3)}
.qopt{display:flex;gap:.5rem;align-items:center}
.qopt .mk{width:1.4rem;flex-shrink:0;font-weight:700;color:var(--text3);text-align:center}
.qopt input[type=radio]{accent-color:var(--accent);width:16px;height:16px;flex-shrink:0}
.qopt.correct input[type=text]{border-color:var(--good);background:var(--good-dim)}
.qcard .row{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}
.qcard .row .grow{flex:1;min-width:12rem}
.qcard .x{background:transparent;border:0;color:var(--text3);cursor:pointer;font-size:1.1rem;
  line-height:1;padding:.2rem .4rem;border-radius:6px}
.qcard .x:hover{color:var(--bad);background:var(--bad-dim)}
.admin-users table{width:100%;border-collapse:collapse;font-size:.87rem}
.admin-users th{text-align:left;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text3);padding:.5rem .6rem;border-bottom:1px solid var(--hair)}
.admin-users td{padding:.55rem .6rem;border-bottom:1px solid var(--hair);color:var(--text2)}
.admin-users td.nm{color:var(--text);font-weight:600}
.role-pill{display:inline-block;padding:.12rem .55rem;border-radius:999px;font-size:.74rem;font-weight:700}
.role-pill.admin{background:var(--accent-dim);color:var(--accent)}
.role-pill.user{background:var(--fill);color:var(--text3)}
.role-pill.editor{background:rgba(255,214,10,.16);color:#e0a800}
:root[data-theme="light"] .role-pill.editor{color:#8a6100}
.role-pill.pending{background:rgba(255,214,10,.16);color:#e0a800}
.role-pill.approved{background:var(--good-dim);color:var(--good)}
.role-pill.rejected{background:var(--bad-dim);color:var(--bad)}
.role-select{padding:.3rem .5rem;border-radius:8px;font:inherit;font-size:.84rem;
  background:var(--fill);border:1px solid var(--glass-border);color:var(--text)}
.admin-users tr.click{cursor:pointer}
.admin-users tr.click:hover td{background:var(--hover)}
.admin-users td .path{display:block;font:.72rem ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color:var(--text3);font-weight:400}
.admin-users .rev-note{font-size:.78rem;color:var(--text3);margin-top:.2rem}
.doc-list button.doc .k.pend{color:#e0a800}
.abtn.attention{border-color:#e0a800;color:#e0a800}
.stale{color:#e0a800;font-size:.8rem}
/* review diff */
.admin-diff{border:1px solid var(--hair);border-radius:14px;background:var(--fill);padding:.85rem 1rem;
  font-size:.82rem;max-height:46vh;overflow:auto}
.admin-diff .t{font-weight:650;color:var(--text2);font-size:.75rem;letter-spacing:.05em;text-transform:uppercase}
.admin-diff .dh{margin:.3rem 0 .6rem;color:var(--text2)}
.admin-diff .dl{padding:.15rem .5rem;border-radius:5px;white-space:pre-wrap;word-break:break-word;
  font:.8rem/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--text3)}
.admin-diff .dl.ctx{color:var(--text3);font-style:italic;padding:.3rem .5rem}
.admin-diff .dl.del{background:var(--bad-dim);color:var(--text2)}
.admin-diff .dl.ins{background:var(--good-dim);color:var(--text)}
.admin-diff del{background:rgba(255,69,58,.35);text-decoration:line-through;color:var(--text)}
.admin-diff ins{background:rgba(48,209,88,.35);text-decoration:none;color:var(--text)}
/* ---------- visual (block) article editor ---------- */
.vbar{position:sticky;top:56px;z-index:20;display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;
  padding:.5rem .7rem;border-radius:12px;background:var(--bg);border:1px solid var(--hair)}
.vbar button{min-width:2.1rem;padding:.32rem .7rem;border-radius:8px;font:inherit;font-size:.85rem;
  background:transparent;color:var(--text2);border:1px solid var(--glass-border);cursor:pointer}
.vbar button:hover{color:var(--text);border-color:var(--hover-border)}
.vbar .sep{width:1px;height:1.2rem;background:var(--hair);margin:0 .3rem}
.vbar .hint{margin-left:auto;font-size:.78rem;color:var(--text3)}
#fmt-bold{font-weight:800}
#fmt-italic{font-style:italic}
.vdoc{max-width:none}
.vblock{position:relative;border-radius:10px;padding:.1rem .1rem .1rem 0;margin:0}
.vblock:hover{background:var(--fill)}
.vblock > .vctl{position:absolute;top:.1rem;right:.2rem;display:none;gap:.15rem;z-index:5}
.vblock:hover > .vctl,.vblock:focus-within > .vctl{display:flex}
.vctl button{width:1.7rem;height:1.7rem;line-height:1;padding:0;border-radius:6px;cursor:pointer;
  font-size:.82rem;background:var(--bg);color:var(--text3);border:1px solid var(--glass-border)}
.vctl button:hover{color:var(--text);border-color:var(--hover-border)}
.vctl button[data-act="del"]:hover{color:var(--bad);border-color:var(--bad)}
.vblock [contenteditable]{outline:0;border-radius:6px;padding:.1rem .3rem;margin-left:-.3rem}
.vblock [contenteditable]:focus{background:var(--accent-dim);
  box-shadow:inset 0 0 0 1px rgba(58,163,158,.4)}
.vblock [contenteditable]:empty::before{content:"Empty — type here";color:var(--text3)}
.cite-chip{display:inline;border-radius:5px;padding:0 .22em;background:var(--accent-dim);
  color:var(--accent);font-size:.93em;cursor:pointer;white-space:normal}
.cite-chip:hover{background:rgba(58,163,158,.28)}
.cite-chip i{font-style:italic}
.vsrc{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;margin:.3rem 0 .9rem;
  font-size:.8rem;color:var(--text3)}
.vsrc label{font-size:.7rem;letter-spacing:.06em;text-transform:uppercase}
.vsrc input{flex:1;min-width:14rem;padding:.3rem .55rem;border-radius:7px;font:inherit;font-size:.78rem;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:var(--fill);border:1px solid var(--glass-border);color:var(--text2)}
.vsrc .abtn{padding:.25rem .6rem;font-size:.76rem}
.uk-label-input{display:block;width:100%;margin-bottom:.5rem;padding:.2rem .4rem;border-radius:6px;
  font:inherit;font-size:.68rem;letter-spacing:.07em;text-transform:uppercase;font-weight:700;
  background:transparent;border:1px dashed var(--glass-border);color:var(--accent)}
.vchildren .vblock:hover{background:transparent}
.vraw{white-space:pre-wrap;font:.8rem ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:var(--fill);border:1px solid var(--hair);border-radius:8px;padding:.5rem .7rem;color:var(--text3)}
.vsvg svg{display:block;max-width:100%;height:auto;margin:0 auto}
td.vrowctl{width:2rem;padding:0 .3rem!important;text-align:center;border-bottom:1px solid var(--hair)}
td.vrowctl button{background:transparent;border:0;color:var(--text3);cursor:pointer;font-size:.8rem}
td.vrowctl button:hover{color:var(--bad)}
.vdoc figure img{max-height:420px;object-fit:contain}
@media(max-width:900px){
  .admin-shell{grid-template-columns:1fr}
  .doc-list{max-height:38vh}
}