:root{
  --text:#202122;--muted:#54595d;--link:#3366cc;--link-visit:#795cb2;
  --border:#a2a9b1;--border-light:#c8ccd1;--bg:#fff;--bg-s:#f8f9fa;
  --bg-h:#eaecf0;--accent:#2a4b8d;--accent-d:#1c366e;--accent-l:#eaf1ff;
  --brick:#8a2a2a;
  --serif:"Linux Libertine","Georgia","Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","Roboto","Helvetica",Arial,sans-serif;
  --mono:"Menlo","Consolas","Liberation Mono",monospace;
}
*{box-sizing:border-box}
html{font-size:100%;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14.4px;line-height:1.6}
a{color:var(--link);text-decoration:none}
a:visited{color:var(--link-visit)}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
code{font-family:var(--mono);background:var(--bg-s);padding:1px 4px;border-radius:2px;font-size:.92em}
hr{border:0;border-top:1px solid var(--border-light);margin:1.4em 0}

/* ----- top header ----- */
.header{display:flex;align-items:center;gap:16px;padding:10px 28px;border-bottom:1px solid var(--border-light);background:#fff;position:sticky;top:0;z-index:50;min-height:66px}
.menu-btn{width:38px;height:38px;background:transparent;border:0;border-radius:2px;cursor:pointer;display:none;position:relative}
.menu-btn:hover{background:var(--bg-h)}
.menu-btn::before,.menu-btn::after,.menu-btn span{content:"";position:absolute;left:9px;right:9px;height:2px;background:#202122;top:12px}
.menu-btn span{top:18px}
.menu-btn::after{top:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);padding-right:12px}
.brand:hover{text-decoration:none}
.brand:visited{color:var(--text)}
.brand img{width:46px;height:46px;flex:0 0 auto}
.brand-words{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--serif);font-weight:700;font-size:24px;letter-spacing:.04em}
.brand-tag{font-family:var(--serif);font-style:italic;font-size:12.5px;color:var(--muted);margin-top:2px}
.search{flex:1;max-width:520px;display:flex}
.search input{flex:1;font:inherit;padding:7px 10px 7px 32px;border:1px solid var(--border);border-right:0;border-radius:2px 0 0 2px;background:#fff url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' width='18'%3E%3Cpath fill='%2372777d' d='M12.9 14.3a7 7 0 1 1 1.4-1.4l4.3 4.3-1.4 1.4-4.3-4.3zM8 13a5 5 0 1 0 0-10 5 5 0 0 0 0 10z'/%3E%3C/svg%3E") 8px 50% no-repeat;outline:none}
.search input:focus{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
.search button{border:1px solid var(--border);background:var(--bg-h);padding:0 16px;cursor:pointer;border-radius:0 2px 2px 0;font:inherit;color:var(--text)}
.search button:hover{background:#dadde3}
.header-right{display:flex;gap:8px;color:var(--muted);font-size:13px;align-items:center}

/* ----- layout ----- */
.shell{display:grid;grid-template-columns:200px 1fr;gap:28px;max-width:1340px;margin:18px auto 8px;padding:0 28px}
.sidebar{font-size:13.3px;padding-right:4px;border-right:1px solid var(--border-light)}
.sidebar h3{font-family:var(--serif);font-weight:400;font-size:13px;margin:4px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--border-light);padding-bottom:4px}
.sidebar ul{list-style:none;margin:0;padding:0}
.sidebar li{margin:3px 0}
.sidebar li a{display:block;padding:3px 6px;border-radius:2px}
.sidebar li a.current{background:var(--bg-h);font-weight:600;color:var(--text)}
.main{min-width:0}

/* ----- article ----- */
.article-tabs{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:0;font-size:13.3px}
.article-tabs span{padding:6px 14px;border:1px solid var(--border);border-bottom:0;background:#fff;color:var(--text);margin-bottom:-1px}
.article-tabs span.active{border-bottom:1px solid #fff;font-weight:600}
.article-tabs span.muted{background:var(--bg-s);color:var(--muted)}
.article-tabs .spacer{flex:1;border:0}

.first-heading{font-family:var(--serif);font-weight:400;font-size:36px;line-height:1.22;margin:12px 0 8px;border-bottom:1px solid var(--border-light);padding-bottom:10px}
.first-heading--portal{border:0;padding-bottom:0;font-size:40px;margin:0 0 6px}
.indicators{color:var(--muted);font-size:13px;margin-bottom:6px;font-style:italic}

.article h2{font-family:var(--serif);font-weight:400;font-size:24px;margin:1.4em 0 .3em;border-bottom:1px solid var(--border-light);padding-bottom:4px}
.article h3{font-family:var(--serif);font-weight:600;font-size:17px;margin:1.1em 0 .3em}
.article p{margin:.6em 0}
.article ul,.article ol{margin:.5em 0 .8em 0;padding-left:1.6em}
.article li{margin:.15em 0}
.article sup{font-size:.78em}
.article .refs{font-size:13.2px;color:#2a2a2a}
.article .refs li{margin:.3em 0}

/* infobox */
.infobox{float:right;clear:right;width:300px;margin:4px 0 16px 20px;background:#f8f9fa;border:1px solid var(--border);font-size:12.8px;line-height:1.4}
.infobox-title{background:var(--bg-h);text-align:center;font-weight:700;padding:6px 10px;border-bottom:1px solid var(--border);font-family:var(--serif);font-size:14px}
.infobox-img{text-align:center;padding:8px}
.infobox-img img{max-width:260px;height:auto;border:1px solid var(--border-light)}
.infobox table{width:100%;border-collapse:collapse}
.infobox th{text-align:left;padding:4px 8px;background:#eff1f3;color:var(--text);width:40%;border-top:1px solid var(--border-light);font-weight:600}
.infobox td{padding:4px 8px;border-top:1px solid var(--border-light)}

/* TOC */
.toc{display:inline-block;max-width:100%;background:#f8f9fa;border:1px solid var(--border-light);padding:8px 16px;margin:12px 0;font-size:13.5px}
.toc .toc-title{font-weight:700;text-align:center;font-family:var(--serif);margin-bottom:4px}
.toc ol{list-style:decimal;margin:0;padding-left:24px}

/* wikitable */
.wikitable{border-collapse:collapse;margin:12px 0;background:#f8f9fa;color:var(--text);border:1px solid #a2a9b1}
.wikitable th,.wikitable td{border:1px solid #a2a9b1;padding:5px 10px;text-align:left;vertical-align:top}
.wikitable th{background:#eaecf0;font-weight:700}

/* categories */
.catlinks{border:1px solid var(--border-light);background:#f8f9fa;padding:6px 10px;margin:24px 0 0;font-size:13px}
.catlinks b{color:var(--muted);font-weight:600;margin-right:6px}

/* site footer */
.site-foot{max-width:1280px;margin:16px auto 24px;padding:12px 20px;font-size:12.5px;color:var(--muted);border-top:1px solid var(--border-light);line-height:1.5}
.site-foot a{color:var(--link)}

/* FX ticker */
.fx-ticker{display:flex;align-items:center;gap:14px;padding:0 20px;height:34px;background:#1c366e;color:#fff;border-bottom:1px solid #0e2550;overflow:hidden;font-size:13px}
.fx-ticker .fx-label{flex:0 0 auto;font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:11.5px;display:flex;align-items:center;gap:8px}
.fx-ticker .fx-dot{width:8px;height:8px;border-radius:50%;background:#5bd27a;box-shadow:0 0 0 0 rgba(91,210,122,.9);animation:fx-pulse 1.6s infinite}
@keyframes fx-pulse{0%{box-shadow:0 0 0 0 rgba(91,210,122,.7)}70%{box-shadow:0 0 0 10px rgba(91,210,122,0)}100%{box-shadow:0 0 0 0 rgba(91,210,122,0)}}
.fx-ticker .fx-viewport{flex:1;overflow:hidden;position:relative;height:100%}
.fx-ticker .fx-viewport::before,.fx-ticker .fx-viewport::after{content:"";position:absolute;top:0;bottom:0;width:30px;z-index:2;pointer-events:none}
.fx-ticker .fx-viewport::before{left:0;background:linear-gradient(90deg,#1c366e,rgba(28,54,110,0))}
.fx-ticker .fx-viewport::after{right:0;background:linear-gradient(-90deg,#1c366e,rgba(28,54,110,0))}
.fx-ticker .fx-track{display:flex;gap:28px;align-items:center;height:100%;white-space:nowrap;animation:fx-marquee 45s linear infinite;width:max-content}
.fx-ticker:hover .fx-track{animation-play-state:paused}
@keyframes fx-marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.fx-item{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums}
.fx-item .fx-sym{background:rgba(255,255,255,.14);padding:2px 7px;border-radius:3px;font-weight:700;font-size:11.5px;letter-spacing:.03em}
.fx-item .fx-price{font-weight:600}
.fx-item .fx-chg{font-size:11.5px;padding:1px 5px;border-radius:3px}
.fx-item .fx-chg.up{color:#9df1a8;background:rgba(80,170,100,.18)}
.fx-item .fx-chg.down{color:#ffb7b7;background:rgba(255,110,110,.18)}
.fx-note{flex:0 0 auto;color:#b4c3df;font-size:11.5px}

/* hero figure */
.hero-fig{margin:14px 0 18px;max-width:720px;clear:none}
.hero-fig img{display:block;width:100%;height:auto;border:1px solid var(--border-light);border-radius:3px;background:#fff}
.hero-fig figcaption{font-size:12.5px;color:var(--muted);padding:4px 2px 0;font-style:italic}

/* ambox note */
.ambox{border:1px solid var(--border-light);border-left:4px solid var(--accent);background:#f8f9fa;padding:8px 12px;margin:10px 0;font-size:13.5px}
.ambox b{color:var(--accent-d)}

/* shops portal row */
.portal-shops{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;margin-top:4px}
.portal-shop{display:flex;flex-direction:column;align-items:center;gap:6px;padding:12px 8px 10px;border:1px solid var(--border-light);border-radius:3px;color:var(--text);background:#fff;text-align:center}
.portal-shop:hover{text-decoration:none;background:var(--bg-s)}
.portal-shop:visited{color:var(--text)}
.portal-shop img{height:36px;width:auto;max-width:120px;object-fit:contain}
.portal-shop-name{font-weight:600;font-size:13px}
.portal-shop-status{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.portal-shop-status.closed{color:var(--brick)}

/* RSS feed lists */
.feed-list{list-style:none;margin:0;padding:0}
.feed-list li{padding:5px 0;border-bottom:1px dotted var(--border-light);font-size:13.2px;display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.feed-list li:last-child{border-bottom:0}
.feed-list .feed-date{color:var(--muted);font-size:12px;flex:0 0 auto;font-variant-numeric:tabular-nums}
.feed-source{margin:8px 0 0;font-size:12.5px;color:var(--muted)}
.feed-source a{color:var(--link)}

/* by the numbers */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-top:6px}
.stat{border:1px solid var(--border-light);border-left:3px solid var(--accent);padding:10px 12px;background:#fff;text-align:center}
.stat b{display:block;font-family:var(--serif);font-size:26px;color:var(--accent-d);line-height:1.1}
.stat span{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.04em}

/* mini timeline */
.mini-timeline{position:relative;display:flex;justify-content:space-between;gap:4px;margin:14px 4px 6px;padding:0 10px 36px;list-style:none}
.mini-timeline::before{content:"";position:absolute;left:14px;right:14px;top:9px;height:2px;background:var(--accent)}
.mini-timeline li{position:relative;flex:1;text-align:center;color:var(--text);font-size:12.5px;min-width:0}
.mini-timeline li::before{content:"";display:block;margin:0 auto 6px;width:14px;height:14px;background:#fff;border:3px solid var(--accent);border-radius:50%;position:relative;z-index:1}
.mini-timeline li b{display:block;font-family:var(--serif);font-size:14px;color:var(--accent-d)}
.mini-timeline li span{display:block;color:var(--muted);font-size:11.5px;line-height:1.25;margin-top:2px}

/* technical primers */
.primers{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;margin-top:4px}
.primer{display:block;border:1px solid var(--border-light);border-top:3px solid var(--accent);padding:12px 14px;background:#fff;color:var(--text);text-decoration:none}
.primer:hover{background:var(--bg-s);text-decoration:none}
.primer:visited{color:var(--text)}
.primer b{display:block;font-family:var(--serif);font-size:16px;color:var(--accent-d);margin-bottom:4px}
.primer span{font-size:13px;color:var(--muted);line-height:1.4}

/* portal grid */
.portal-top{background:linear-gradient(180deg,#f8f9fa,#fff);border:1px solid var(--border-light);padding:18px 22px;border-radius:2px;margin-bottom:16px}
.portal-welcome h1{margin:0 0 6px}
.portal-stats{color:var(--muted);font-size:13px;margin:6px 0 0}
.portal-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:16px}
.portal-box{border:1px solid var(--border-light);background:#fff;padding:12px 16px;border-radius:2px}
.portal-box--featured{grid-column:1/-1}
.portal-box h2{font-family:var(--serif);font-weight:400;font-size:19px;margin:0 0 8px;border-bottom:1px solid var(--border-light);padding-bottom:4px}
.portal-list{list-style:disc;margin:0;padding-left:20px}
.portal-list li{margin:.25em 0}

/* responsive */
@media (max-width:900px){
  .fx-ticker{padding:0 10px;height:30px;font-size:12px}
  .fx-ticker .fx-label{font-size:10.5px}
  .fx-ticker .fx-note{display:none}
  .header{padding:8px 14px;min-height:58px}
  .brand-tag{display:none}
  .brand-name{font-size:20px}
  .infobox{float:none;width:100%;margin:12px 0 16px}
  .shell{grid-template-columns:1fr;gap:12px;padding:0 14px}
  .sidebar{display:none;background:#fff;border:1px solid var(--border-light);border-right:1px solid var(--border-light);padding:10px 14px;border-radius:2px}
  .sidebar.open{display:block}
  .menu-btn{display:block}
  .search{max-width:none}
  .header-right{display:none}
  .first-heading{font-size:28px}
  .first-heading--portal{font-size:30px}
  .portal-grid{grid-template-columns:1fr}
  .article-tabs span{padding:5px 10px;font-size:12.5px}
  .article-tabs span.muted:nth-last-child(-n+3){display:none}
}