:root{--bg:#f3f4f6;--surface:#ffffff;--surface2:#f8f9fb;--text:#101318;--muted:#4a5261;--faint:#5f6775;--line:#e2e5ea;--accent:#0e7490;--accent-text:#0e7490;--on-accent:#ffffff;--ok-bg:#ecfdf3;--ok-text:#14532d;--ok-line:#bbf7d0;--band-from:#0e7490;--band-to:#094b5e;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0c0e12;--surface:#161a21;--surface2:#1b2029;--text:#eceef2;--muted:#b6bcc8;--faint:#9da4b0;--line:#2a303b;--accent:#0e7490;--accent-text:#4a97ac;--on-accent:#ffffff;--ok-bg:#0f2a1b;--ok-text:#bbf7d0;--ok-line:#1f5136;--band-from:#0c637a;--band-to:#073a48;--shadow:0 1px 2px rgba(0,0,0,.5),0 8px 24px rgba(0,0,0,.35);--shadow-up:0 2px 4px rgba(0,0,0,.5),0 16px 36px rgba(0,0,0,.5)}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
:root{--sans:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--serif:Charter,"Bitstream Charter","Iowan Old Style","Sitka Text",Cambria,Georgia,serif;--radius:14px;--shadow:0 1px 2px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.07);--shadow-up:0 2px 4px rgba(16,24,40,.08),0 16px 36px rgba(16,24,40,.12)}
a{color:var(--accent-text)}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent-text);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:var(--serif);color:var(--text);letter-spacing:-.01em}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:9;background:var(--surface);padding:8px 12px}

/* Header */
.top{position:sticky;top:0;z-index:50;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(16,24,40,.02)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font:700 18px/1 var(--sans);letter-spacing:-.01em}
.mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--band-from),var(--band-to));color:var(--on-accent);font:800 14px/1 var(--sans)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;border-radius:999px;font:600 14px/1 var(--sans);text-decoration:none;white-space:nowrap}
.btn-accent{background:var(--accent);color:var(--on-accent)}
.btn-accent:hover{filter:brightness(1.08)}
.btn-ghost{border:1px solid var(--line);color:var(--text);background:var(--surface)}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;padding-bottom:10px}
.tabs::-webkit-scrollbar{display:none}
.tabs a{flex:none;padding:7px 12px;border-radius:999px;color:var(--muted);text-decoration:none;font:500 14px/1.2 var(--sans)}
.tabs a:hover,.tabs a[aria-current="page"]{background:var(--surface2);color:var(--text)}

/* Sections */
main.wrap{padding-top:28px;padding-bottom:64px}
.section{margin:44px 0 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 16px;border-top:3px solid var(--text);padding-top:10px}
.section-head h2{margin:0;font-size:24px}
.section-head a{font:600 14px/1 var(--sans);text-decoration:none}
.kicker{font:700 12px/1.2 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--accent-text);margin:0 0 8px}

/* Tiles */
.tile{position:relative;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.tile:hover,.tile:focus-within{transform:translateY(-3px);box-shadow:var(--shadow-up)}
.tile-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.tile h3{margin:0;font-size:20px;line-height:1.25}
.tile h3 a{color:var(--text);text-decoration:none}
.tile h3 a.stretch::after{content:"";position:absolute;inset:0;z-index:1}
.tile p{margin:0}
.tile .sum{color:var(--muted);font-size:15px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.meta{color:var(--faint);font:500 13px/1.4 var(--sans)}
.chip{align-self:flex-start;font:700 11px/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--accent-text);background:var(--surface2);border:1px solid var(--line);padding:6px 9px;border-radius:999px}
a.chip{text-decoration:none;position:relative;z-index:2}
.art{height:150px;background-color:var(--band-from);background-image:linear-gradient(135deg,var(--band-from),var(--band-to))}
.art.art-0{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Ccircle%20cx%3D'80'%20cy%3D'80'%20r%3D'30'%2F%3E%3Ccircle%20cx%3D'80'%20cy%3D'80'%20r%3D'55'%2F%3E%3Ccircle%20cx%3D'80'%20cy%3D'80'%20r%3D'78'%2F%3E%3C%2Fsvg%3E"),linear-gradient(135deg,var(--band-from),var(--band-to))}
.art.art-1{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Cpath%20d%3D'M0%2040%20L40%200%20M0%2080%20L80%200%20M0%20120%20L120%200%20M0%20160%20L160%200%20M40%20160%20L160%2040%20M80%20160%20L160%2080%20M120%20160%20L160%20120'%2F%3E%3C%2Fsvg%3E"),linear-gradient(160deg,var(--band-from),var(--band-to))}
.art.art-2{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Cg%20fill%3D'white'%20fill-opacity%3D'.22'%20stroke%3D'none'%3E%3Ccircle%20cx%3D'20'%20cy%3D'20'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'60'%20cy%3D'20'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'100'%20cy%3D'20'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'140'%20cy%3D'20'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'40'%20cy%3D'60'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'80'%20cy%3D'60'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'120'%20cy%3D'60'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'20'%20cy%3D'100'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'60'%20cy%3D'100'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'100'%20cy%3D'100'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'140'%20cy%3D'100'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'40'%20cy%3D'140'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'80'%20cy%3D'140'%20r%3D'3'%2F%3E%3Ccircle%20cx%3D'120'%20cy%3D'140'%20r%3D'3'%2F%3E%3C%2Fg%3E%3C%2Fsvg%3E"),linear-gradient(120deg,var(--band-to),var(--band-from))}
.art.art-3{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Cpath%20d%3D'M0%2040%20Q40%2010%2080%2040%20T160%2040%20M0%2090%20Q40%2060%2080%2090%20T160%2090%20M0%20140%20Q40%20110%2080%20140%20T160%20140'%2F%3E%3C%2Fsvg%3E"),linear-gradient(180deg,var(--band-from),var(--band-to))}
.art.art-4{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Cpath%20d%3D'M20%20140%20L80%2020%20L140%20140%20Z%20M50%20140%20L80%2080%20L110%20140'%2F%3E%3C%2Fsvg%3E"),linear-gradient(100deg,var(--band-to),var(--band-from))}
.art.art-5{background-image:url("data:image/svg+xml,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'160'%20height%3D'160'%20viewBox%3D'0%200%20160%20160'%20fill%3D'none'%20stroke%3D'white'%20stroke-opacity%3D'.22'%20stroke-width%3D'1.5'%3E%3Crect%20x%3D'20'%20y%3D'20'%20width%3D'50'%20height%3D'50'%20rx%3D'8'%2F%3E%3Crect%20x%3D'90'%20y%3D'90'%20width%3D'50'%20height%3D'50'%20rx%3D'8'%2F%3E%3Crect%20x%3D'90'%20y%3D'20'%20width%3D'50'%20height%3D'50'%20rx%3D'25'%2F%3E%3Crect%20x%3D'20'%20y%3D'90'%20width%3D'50'%20height%3D'50'%20rx%3D'25'%2F%3E%3C%2Fsvg%3E"),linear-gradient(145deg,var(--band-from),var(--band-to))}
.tile.news .tile-body{gap:6px}
.tile.news .src{font:600 13px/1.4 var(--sans);position:relative;z-index:2}
.tile.soon{background:var(--surface2);box-shadow:none;border-style:dashed}
.tile.soon:hover{transform:none;box-shadow:none}
.tile.soon h3{font-size:18px;color:var(--muted)}

/* Front page */
.lead{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:22px}
.hero .art{height:300px}
.hero h3{font-size:34px;line-height:1.15}
.hero .sum{font-size:17px;-webkit-line-clamp:4}
.hero.intro .tile-body{justify-content:flex-start;padding-top:26px}
.hero.intro .chips{margin-top:10px}
.hero.intro .chips a{box-shadow:none;background:var(--surface2)}
.stack{display:grid;gap:16px;align-content:start}
.stack .tile h3{font-size:18px}
.grid{display:grid;gap:20px;grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-4 .tile h3{font-size:17px}
.band{margin:52px 0 0;border-radius:calc(var(--radius) + 4px);padding:32px 34px;background:linear-gradient(135deg,var(--band-from),var(--band-to));color:var(--on-accent);box-shadow:var(--shadow-up);display:flex;gap:24px;align-items:center;justify-content:space-between}
.band h2{color:var(--on-accent);margin:0 0 6px;font-size:26px}
.band p{margin:0;max-width:62ch;color:var(--on-accent)}
.band .btn{background:var(--surface);color:var(--text)}

/* Catalog table */
.catalog-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
table.catalog{width:100%;border-collapse:collapse;font:15px/1.45 var(--sans)}
.catalog th{text-align:left;font:700 12px/1 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--surface2);padding:12px 16px;border-bottom:1px solid var(--line)}
.catalog td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
.catalog tr:last-child td{border-bottom:0}
.catalog td:first-child a{font:600 16px/1.3 var(--serif);color:var(--text);text-decoration:none}
.catalog td:first-child a:hover{color:var(--accent-text)}
.catalog .num{text-align:right;font-variant-numeric:tabular-nums;color:var(--text);font-weight:600}
.catalog .soon-title{color:var(--faint)}
.subject{margin:36px 0 0}

/* Subject page banner */
.banner{border-radius:calc(var(--radius) + 4px);overflow:hidden;box-shadow:var(--shadow);margin:6px 0 8px}
.banner .art{height:auto;padding:44px 36px;color:var(--on-accent)}
.banner h1{color:var(--on-accent);font-size:42px;line-height:1.1;margin:6px 0 10px}
.banner p{margin:0;max-width:64ch;color:var(--on-accent);font-size:17px}
.banner .kicker{color:var(--on-accent);opacity:.9}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips a{font:600 14px/1 var(--sans);text-decoration:none;color:var(--text);background:var(--surface);border:1px solid var(--line);padding:10px 14px;border-radius:999px;box-shadow:var(--shadow)}
.empty-note{color:var(--muted);margin:0 0 14px}

/* Article */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.post{max-width:720px}
.post h1{font-size:44px;line-height:1.12;margin:10px 0 14px}
.post .lede{font:400 21px/1.5 var(--serif);color:var(--muted);margin:0 0 18px}
.byline{display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;color:var(--faint);font:500 14px/1.4 var(--sans);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;margin:0 0 26px}
.prose{font:19px/1.72 var(--serif);color:var(--text)}
.prose h2{font-size:27px;margin:38px 0 10px}
.prose h3{font-size:22px;margin:28px 0 8px}
.prose p,.prose ul,.prose ol{margin:0 0 18px}
.prose blockquote{margin:22px 0;padding:6px 0 6px 18px;border-left:4px solid var(--accent);color:var(--muted)}
.prose code{font-size:.85em;background:var(--surface2);padding:2px 5px;border-radius:5px}
sup.cite a{font:600 12px/1 var(--sans);text-decoration:none}
.crumbs{font:500 14px/1.4 var(--sans);color:var(--faint);margin:0 0 6px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-text)}
.reviewed{display:inline-flex;align-items:center;gap:6px;font:600 13px/1.3 var(--sans);color:var(--ok-text);background:var(--ok-bg);border:1px solid var(--ok-line);border-radius:999px;padding:5px 11px;margin:0;position:relative;z-index:2}
.tile .reviewed{align-self:flex-start}
.reviewed::before{content:"✓";font-weight:800}
.cta-inline{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;box-shadow:var(--shadow);padding:18px 20px;margin:30px 0;font:16px/1.55 var(--sans);color:var(--text)}
.cta-inline p{margin:0 0 10px;color:var(--text)}
.cta-inline .ask{color:var(--muted)}
.cta-inline a{font-weight:700}
.cta{margin:30px 0}
.cta a{display:inline-block;background:var(--accent);color:var(--on-accent);padding:13px 22px;border-radius:999px;font:700 15px/1 var(--sans);text-decoration:none}
.refs{margin:44px 0 0;padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);font:14px/1.55 var(--sans);color:var(--muted)}
.refs h2{font-size:20px;margin:0 0 10px}
.refs ol{padding-left:22px;margin:0 0 14px}
.refs li{margin:0 0 8px}
.ev{display:inline-block;font:600 11px/1 var(--sans);text-transform:uppercase;letter-spacing:.05em;color:var(--accent-text);border:1px solid var(--line);border-radius:999px;padding:4px 7px;margin-left:4px}
.how{color:var(--faint);font-size:13px;margin:0}
.keep{margin:52px 0 0}
.frontpage{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:22px 0 0;padding:24px 26px}
.frontpage h3{font-size:22px}
.frontpage .btn{position:relative;z-index:2}
.rail{position:sticky;top:132px;display:grid;gap:18px}
.rail .tile-body{gap:12px}
.rail h2{font:700 13px/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0}
.rail ol{list-style:none;margin:0;padding:0;display:grid;gap:12px;counter-reset:n}
.rail li{counter-increment:n;display:grid;grid-template-columns:22px 1fr;gap:8px}
.rail li::before{content:counter(n);font:800 16px/1.3 var(--sans);color:var(--accent-text)}
.rail li a{color:var(--text);text-decoration:none;font:600 15px/1.35 var(--serif)}
.rail li a:hover{color:var(--accent-text)}
.rail .meta{display:block;margin-top:2px}

/* Prose pages (about, trending intro, errors) */
.page-head{max-width:760px;margin:0 0 8px}
.page-head h1{font-size:40px;line-height:1.12;margin:8px 0 10px}
.page-head p{color:var(--muted);font-size:18px;margin:0}
.about{max-width:760px}
.about p{font:18px/1.7 var(--serif)}

/* Footer */
.foot{border-top:1px solid var(--line);background:var(--surface);color:var(--muted);font:14px/1.6 var(--sans);padding:36px 0 120px}
.foot .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}
.foot h2{font:700 12px/1 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--text);margin:0 0 12px}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--accent-text)}

/* Delayed booking bar (dismissible, no script) */
.cta-bar{position:fixed;left:50%;bottom:16px;transform:translate(-50%,140%);width:min(720px,calc(100% - 24px));display:flex;align-items:center;gap:14px;justify-content:space-between;background:var(--surface);color:var(--text);border:1px solid var(--line);border-radius:999px;box-shadow:var(--shadow-up);padding:10px 10px 10px 20px;font:600 14px/1.3 var(--sans);z-index:40;animation:bar-in .5s ease 12s forwards}
.cta-bar a{background:var(--accent);color:var(--on-accent);padding:10px 16px;border-radius:999px;text-decoration:none;white-space:nowrap}
.cta-close{cursor:pointer;color:var(--muted);font-size:20px;padding:0 6px}
.cta-x:checked+.cta-bar{display:none}
@keyframes bar-in{to{transform:translate(-50%,0)}}

/* Responsive */
@media (max-width:1024px){.article-grid{grid-template-columns:minmax(0,1fr)}.rail{position:static}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:860px){.lead{grid-template-columns:minmax(0,1fr)}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.band{flex-direction:column;align-items:flex-start}.foot .cols{grid-template-columns:1fr}}
@media (max-width:600px){
  .wrap{padding:0 16px}.bar{height:58px}.brand{font-size:16px}.bar .btn{padding:9px 12px;font-size:13px}
  .grid,.grid-4{grid-template-columns:minmax(0,1fr)}
  .hero .art{height:180px}.hero h3{font-size:26px}
  .post h1,.page-head h1,.banner h1{font-size:30px}.post .lede{font-size:18px}.prose{font-size:18px}
  .banner .art{padding:28px 22px}.band{padding:24px 22px}
  .frontpage{flex-direction:column;align-items:flex-start}
  table.catalog thead{display:none}
  table.catalog,.catalog tbody,.catalog tr,.catalog td{display:block;width:100%}
  .catalog tr{border-bottom:1px solid var(--line);padding:6px 0}
  .catalog td{border:0;padding:4px 16px}
  .catalog .num{text-align:left}
  .catalog .num::after{content:" articles";font-weight:400;color:var(--muted)}
  .cta-bar{border-radius:16px}
  .subject .grid>:nth-child(n+3){display:none}
}
@media (prefers-reduced-motion:reduce){.tile,.tile:hover{transition:none;transform:none}.cta-bar{animation:none;transform:translate(-50%,0)}}