:root{
  --bg:#ffffff; --surface:#f7f9fc; --surface-2:#eef3f9; --ink:#111b27; --ink-2:#4b5869; --ink-3:#6f7c8e;
  --line:#e3e8ef; --brand:#0b3d63; --accent:#3a72a6; --accent-ink:#ffffff; --accent-soft:#e7eef7;
  --radius-lg:20px; --radius:14px; --radius-sm:10px;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color-scheme:light; box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
:root[data-theme="dark"]{
  --bg:#0c1219; --surface:#131c27; --surface-2:#182433; --ink:#eef2f7; --ink-2:#b5c0ce; --ink-3:#8593a5;
  --line:#243243; --brand:#cfe0f2; --accent:#7fb0e0; --accent-ink:#0c1219; --accent-soft:#1a2c40; color-scheme:dark}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(80px + env(safe-area-inset-top,0px));-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit} img{max-width:100%}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.logo{display:inline-grid;place-items:center;flex-shrink:0;border-radius:9px}
.logo img{display:block;width:100%;height:100%;object-fit:contain}
:root[data-theme="dark"] .logo{background:#eef3f9;padding:3px}
.eyebrow{margin:0 0 10px;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.card-title{margin:0;font-size:14px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink)}

/* sponsor bar */
.topbar{background:var(--surface);border-bottom:1px solid var(--line);font-size:14px;color:var(--ink-2)}
.topbar .wrap{display:flex;gap:10px;align-items:center;justify-content:center;flex-wrap:wrap;padding-top:9px;padding-bottom:9px;text-align:center}
.topbar strong{color:var(--ink);font-weight:650}
.topbar a{font-weight:650;color:var(--accent);text-decoration:none}
.topbar a:hover{text-decoration:underline}

/* header */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:18px;letter-spacing:-.015em;white-space:nowrap}
.brand .logo{width:34px;height:34px}
.nav{display:flex;align-items:center;gap:6px}
.nav a{text-decoration:none;font-size:15px;color:var(--ink-2);padding:8px 10px;border-radius:var(--radius-sm);white-space:nowrap}
.nav a:hover{color:var(--ink);background:var(--surface)}
.theme-toggle{width:38px;height:38px;border:1px solid var(--line);background:var(--bg);border-radius:50%;font-size:18px;cursor:pointer;line-height:1}
.theme-toggle:hover{background:var(--surface)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;font-weight:650;font-size:15px;padding:12px 18px;border-radius:12px;white-space:nowrap;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.07)}
.btn-ghost{background:var(--bg);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface-2)}
.actions{display:flex;gap:10px;flex-wrap:wrap}

/* promo card */
.promo{margin:28px 0 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 36px;display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center}
.promo .logo{width:64px;height:64px}
.promo h2{margin:0 0 6px;font-size:clamp(22px,2.8vw,30px);line-height:1.15;letter-spacing:-.025em;font-weight:750;color:var(--ink)}
.promo p{margin:0;color:var(--ink-2);max-width:60ch}

/* masthead */
.masthead{padding:64px 0 28px}
.masthead h1{margin:0;font-family:var(--serif);font-weight:500;font-size:clamp(48px,9vw,104px);line-height:.95;letter-spacing:-.035em;color:var(--brand)}
.masthead p{margin:18px 0 0;max-width:62ch;color:var(--ink-2);font-size:18px}
.masthead p strong{color:var(--ink);font-weight:650}

/* toolbar */
.toolbar{display:grid;grid-template-columns:1fr 210px 170px;gap:10px;padding:8px 0 28px;border-bottom:1px solid var(--line)}
.field{position:relative}
.field label{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.toolbar input,.toolbar select{width:100%;height:46px;border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:12px;padding:0 14px;font:inherit;font-size:15px}
.toolbar input{padding-left:40px}
.field .ico{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--ink-3);pointer-events:none}
.toolbar input:focus,.toolbar select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

/* covers (light) */
.cover{position:relative;overflow:hidden;border-radius:var(--radius);background:var(--surface-2);border:1px solid var(--line);display:flex;align-items:flex-end;padding:18px;aspect-ratio:16/10}
.cover::after{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--hue)}
.cover .wm{position:absolute;right:-4%;top:-10%;width:52%;opacity:.07}
:root[data-theme="dark"] .cover .wm{filter:invert(1);opacity:.1}
.cover .car{position:absolute;right:18px;top:18px;width:54px;color:var(--hue);opacity:.9}
.cover b{position:relative;color:var(--brand);font-family:var(--serif);font-weight:500;font-size:clamp(20px,2.2vw,27px);line-height:1.08;letter-spacing:-.02em;max-width:88%}

/* grid */
.section-head{display:flex;justify-content:space-between;align-items:baseline;padding:32px 0 18px}
.section-head h2{margin:0;font-size:22px;letter-spacing:-.02em;font-weight:750}
.count{color:var(--ink-3);font-size:14px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px 24px}
.card{display:flex;flex-direction:column;text-decoration:none;color:inherit}
.card:hover h3{color:var(--accent)}
.meta{display:flex;gap:12px;align-items:center;color:var(--ink-3);font-size:13px;margin:14px 0 6px;flex-wrap:wrap}
.tag{color:var(--accent);font-weight:650}
.card h3{margin:0 0 6px;font-size:19px;line-height:1.3;letter-spacing:-.015em;font-weight:700}
.card p{margin:0;color:var(--ink-2);font-size:15px}
.card.lead{grid-column:1/-1;display:grid;grid-template-columns:1.25fr 1fr;gap:32px;align-items:center}
.card.lead .cover{aspect-ratio:16/9}
.card.lead .cover b{font-size:clamp(28px,3.4vw,42px)}
.card.lead h3{font-size:clamp(24px,2.6vw,32px);font-family:var(--serif);font-weight:500;line-height:1.15;letter-spacing:-.02em}
.card.lead p{font-size:17px}
.empty{grid-column:1/-1;text-align:center;padding:60px 20px;border:1px dashed var(--line);border-radius:var(--radius-lg);color:var(--ink-2)}
.empty strong{display:block;color:var(--ink);font-size:18px;margin-bottom:4px}
.empty button{margin-top:14px;border:1px solid var(--line);background:var(--bg);padding:9px 16px;border-radius:999px;cursor:pointer}

.about{margin:64px 0 0;padding:28px 30px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);display:grid;grid-template-columns:200px 1fr;gap:20px}
.about p{margin:0;color:var(--ink-2)}

.site-footer{margin-top:56px;border-top:1px solid var(--line)}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-top:24px;padding-bottom:32px;color:var(--ink-3);font-size:14px;flex-wrap:wrap}
.site-footer nav{display:flex;gap:18px}
.site-footer a{text-decoration:none;color:var(--ink-2)}
.site-footer a:hover{color:var(--ink)}

/* ---------- article page ---------- */
.progress{position:fixed;top:0;left:0;height:3px;background:var(--accent);width:0;z-index:20}
.article-layout{display:grid;grid-template-columns:250px minmax(0,720px) 300px;gap:40px;justify-content:center;padding-top:40px}
.rail{position:sticky;top:90px;align-self:start;display:flex;flex-direction:column;gap:18px;max-height:calc(100vh - 110px);overflow:auto;scrollbar-width:thin}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px}

/* TOC */
.toc-head{display:flex;justify-content:space-between;align-items:center}
.toc-toggle{border:0;background:none;font-size:22px;line-height:1;width:28px;height:28px;cursor:pointer;color:var(--ink-2);border-radius:6px}
.toc ol{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:14px}
.toc a{display:grid;grid-template-columns:30px 1fr;text-decoration:none;color:var(--ink-3);font-size:15px;line-height:1.4}
.toc a b{font-weight:700;color:var(--ink-2)}
.toc a:hover{color:var(--ink)}
.toc a.active{color:var(--accent)} .toc a.active b{color:var(--accent)}
.toc-foot{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);font-size:14px;color:var(--ink-3)}
.toc.collapsed ol,.toc.collapsed .toc-foot{display:none}

/* article column */
.back{display:inline-flex;gap:6px;text-decoration:none;color:var(--ink-2);font-size:15px;margin-bottom:24px}
.back:hover{color:var(--ink)}
.article .meta{margin:0 0 14px;font-size:14px}
.article h1{margin:0;font-family:var(--serif);font-weight:500;font-size:clamp(34px,5vw,54px);line-height:1.05;letter-spacing:-.03em}
.dek{margin:18px 0 0;font-size:20px;line-height:1.5;color:var(--ink-2)}
.article .cover{aspect-ratio:21/9;margin:30px 0 24px;border-radius:var(--radius-lg)}

/* listen */
.listen{margin:0 0 34px}
.listen-top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.listen-top strong{font-size:18px;letter-spacing:-.01em}
.listen-ctrls{display:flex;gap:8px;flex-wrap:wrap}
.ctrl{height:44px;min-width:44px;padding:0 14px;border:1px solid var(--line);background:var(--bg);border-radius:12px;cursor:pointer;font-size:15px;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.ctrl:hover{background:var(--surface-2)}
select.ctrl{appearance:auto;max-width:200px}
.track{margin-top:18px;height:6px;border-radius:99px;background:var(--line);overflow:hidden;cursor:pointer}
.track i{display:block;height:100%;width:0;background:var(--accent);border-radius:99px;transition:width .3s linear}
.times{display:flex;justify-content:space-between;margin-top:10px;font-size:14px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.listen-note{margin:8px 0 0;font-size:13px;color:var(--ink-3)}

.prose{font-family:var(--serif);font-size:20px;line-height:1.68}
.prose p{margin:0 0 1.15em}
.prose h2{font-family:var(--sans);font-size:24px;line-height:1.25;letter-spacing:-.02em;font-weight:750;margin:1.8em 0 .6em}
.prose ul,.prose ol{padding-left:1.2em;margin:0 0 1.2em}
.prose li{margin:.35em 0}
.prose blockquote{margin:1.6em 0;padding:4px 0 4px 22px;border-left:3px solid var(--accent);font-size:23px;line-height:1.45}
.prose .reading{background:var(--accent-soft);border-radius:4px}
.inline-cta{font-family:var(--sans);margin:2.2em 0;padding:24px 26px;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius-lg);display:grid;grid-template-columns:auto 1fr;gap:16px 18px;align-items:center}
.inline-cta .logo{width:44px;height:44px}
.inline-cta strong{display:block;font-size:17px;margin-bottom:2px}
.inline-cta span{color:var(--ink-2);font-size:15px;line-height:1.5}
.inline-cta .actions{grid-column:1/-1}

/* comparison */
.compare{margin:64px 0 0;padding:44px 48px;background:var(--surface);border:1px solid var(--line);border-radius:28px}
.compare h2{margin:0;font-size:clamp(28px,3.4vw,40px);line-height:1.1;letter-spacing:-.035em;font-weight:750}
.compare>p{margin:14px 0 30px;font-size:19px;color:var(--ink-3);line-height:1.55}
.cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.cmp{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 30px;display:flex;flex-direction:column}
.cmp-head{display:flex;justify-content:space-between;gap:12px;align-items:baseline;flex-wrap:wrap}
.cmp-head h3{margin:0;font-size:24px;letter-spacing:-.02em;font-weight:750}
.price{font-weight:700;color:var(--ink-3);font-size:16px}
.cmp p{margin:16px 0 18px;font-size:17px;line-height:1.55;flex:1}
.cmp a{color:var(--accent);font-weight:700;text-decoration:none;font-size:17px}
.cmp a:hover{text-decoration:underline}
.cmp.win{grid-column:1/-1;margin-top:0;background:var(--accent-soft);border:1.5px solid var(--accent)}
.cmp.win .price{color:var(--accent);font-size:24px}
.badge{display:inline-block;margin-left:12px;vertical-align:4px;background:var(--accent);color:var(--accent-ink);font-size:12px;font-weight:750;letter-spacing:.09em;text-transform:uppercase;padding:6px 12px;border-radius:999px}
.cmp-note{margin:24px 0 0;font-size:15px;color:var(--ink-3);line-height:1.55}

/* sidebar */
.author .logo{width:72px;height:72px;margin:18px 0 14px}
.author h3{margin:0;font-size:22px;letter-spacing:-.02em}
.author time{display:block;margin:6px 0 18px;color:var(--ink-3)}
.author .btn{font-size:17px;padding:14px 22px}
.share-head{display:flex;justify-content:space-between;align-items:center}
.share-head .logo{width:30px;height:30px}
.share-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
.share-grid a,.share-grid button{height:48px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:var(--bg);border-radius:12px;text-decoration:none;font-weight:700;font-size:15px;cursor:pointer}
.share-grid a:hover,.share-grid button:hover{background:var(--surface-2)}
.related-list{display:flex;flex-direction:column;gap:16px;margin-top:18px}
.rel{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:center;text-decoration:none}
.rel .cover{aspect-ratio:1/1;padding:8px;border-radius:12px;min-height:0}
.rel .cover b{display:none}
.rel .cover .car{width:40px;right:50%;top:50%;transform:translate(50%,-50%)}
.rel span{font-weight:700;font-size:15px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.rel:hover span{color:var(--accent)}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%) translateY(20px);opacity:0;background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;transition:.2s;pointer-events:none;z-index:30}
.toast.show{opacity:1;transform:translateX(-50%)}
.article-end .promo{margin-top:56px}
.more h2{font-size:22px;margin:56px 0 18px;letter-spacing:-.02em}

@media (max-width:1180px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;max-width:1080px;margin:0 auto}
  .toc-rail{grid-column:1/-1;position:static;max-height:none}
  .toc-rail .toc ol{display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}
}
@media (max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .card.lead{grid-template-columns:1fr;gap:0}
  .toolbar{grid-template-columns:1fr 1fr}
  .toolbar .field:first-child{grid-column:1/-1}
  .article-layout{grid-template-columns:1fr;gap:24px}
  .side-rail{position:static;max-height:none;display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .side-rail .related{grid-column:1/-1}
  .promo{grid-template-columns:1fr auto}
  .promo .logo{display:none}
}
@media (max-width:620px){
  .grid{grid-template-columns:1fr}
  .promo{grid-template-columns:1fr;padding:26px 22px}
  .about{grid-template-columns:1fr;gap:8px}
  .masthead{padding-top:44px}
  .prose{font-size:18.5px} .dek{font-size:18px}
  .nav .hide-sm{display:none}
  .topbar span{display:none}
  .toc-rail .toc ol{grid-template-columns:1fr}
  .side-rail{grid-template-columns:1fr}
  .compare{padding:28px 20px;border-radius:22px}
  .cmp-grid{grid-template-columns:1fr}
  .cmp{padding:22px}
  .badge{margin:8px 0 0;display:inline-block}
  .listen-ctrls{width:100%} .listen-ctrls select{flex:1}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.side-rail{position:static;max-height:none;overflow:visible}
@media (min-width:901px){.cmp-grid{grid-template-columns:1fr 1fr}}
.inline-cta span{display:block}
.cover.has-img{padding:0}
.cover.has-img::after{display:none}
.cover .photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.state{padding:120px 0;text-align:center;color:var(--ink-3)}
.prose a{color:var(--accent);text-underline-offset:3px}

/* article images */
.prose .figure{margin:1.8em 0;font-family:var(--sans)}
.prose .zoom{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in;border-radius:var(--radius)}
.prose .figure img{display:block;width:100%;height:auto;border-radius:var(--radius);background:var(--surface-2)}
.prose .figure figcaption{margin-top:10px;font-size:14.5px;line-height:1.5;color:var(--ink-3)}
.prose .figure.broken .zoom{cursor:default;min-height:120px;border:1px dashed var(--line);display:grid;place-items:center}
.prose .figure.broken img{display:none}
.prose .figure.broken .zoom::after{content:"Image unavailable";color:var(--ink-3);font-size:14px}
.lightbox{max-width:min(1200px,96vw);max-height:94vh;width:auto;padding:0;border:0;background:transparent;overflow:visible}
.lightbox::backdrop{background:rgba(8,14,22,.86)}
.lightbox img{display:block;max-width:min(1200px,96vw);max-height:84vh;width:auto;height:auto;margin:0 auto;border-radius:10px;cursor:zoom-out}
.lightbox p{color:#dbe4ee;text-align:center;margin:12px auto 0;max-width:70ch;font-size:15px}
.lightbox p a{color:#9cc4ec}
.lb-close{position:fixed;top:calc(14px + env(safe-area-inset-top,0px));right:16px;width:42px;height:42px;border-radius:50%;border:0;background:rgba(255,255,255,.14);color:#fff;font-size:26px;line-height:1;cursor:pointer}