/* Stackgrade: lab-report brand, legibility first.
   Scale: 4 8 12 16 24 32 48 64. Body 18px desktop, 17px mobile. Nothing under 14px. */
:root{
  --bg:#F6F5F0; --surface:#FFFFFF; --ink:#14151A; --muted:#41434A; --rule:#CFCDC2; --rule-strong:#14151A;
  --signal:#E8FF3A; --signal-ink:#14151A; --tint:#ECEBE3; --zebra:#F1F0E9; --link:#14151A; --focus:#14151A;
  --head:"Space Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif;
  --body:"Work Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --fs:1.125rem; color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#111215; --surface:#1A1C20; --ink:#F2F1EB; --muted:#C8CAD0; --rule:#3A3D43; --rule-strong:#F2F1EB;
  --tint:#23252A; --zebra:#1E2024; --link:#F2F1EB; --focus:#E8FF3A; color-scheme:dark;}}
:root[data-theme="dark"]{
  --bg:#111215; --surface:#1A1C20; --ink:#F2F1EB; --muted:#C8CAD0; --rule:#3A3D43; --rule-strong:#F2F1EB;
  --tint:#23252A; --zebra:#1E2024; --link:#F2F1EB; --focus:#E8FF3A; color-scheme:dark;}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 var(--fs)/1.65 var(--body);text-rendering:optimizeLegibility;overflow-wrap:break-word}
@media (max-width:640px){:root{--fs:1.0625rem}}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;text-decoration-color:color-mix(in srgb,var(--ink) 55%,transparent)}
a:hover{background:var(--signal);color:var(--signal-ink);text-decoration-color:var(--signal-ink)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
:root[data-theme="dark"] a:focus-visible,.site-head a:focus-visible{outline-color:var(--focus)}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)} .small{font-size:.9rem}
.sr{position:absolute;left:-9999px}
.skip{position:absolute;left:-9999px;top:0;background:var(--signal);color:var(--signal-ink);padding:12px 16px;z-index:50}
.skip:focus{left:8px;top:8px}
.wrap{width:min(1120px,100% - 32px);margin-inline:auto}

/* header: two rows, brand then nav */
.site-head{background:var(--bg);border-bottom:1px solid var(--rule-strong)}
.head-row{display:flex;align-items:center;gap:16px;min-height:64px;padding:8px 0}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand:hover{background:none;color:var(--ink)}
.brand .word{font:700 1.5rem/1 var(--head);letter-spacing:-.02em}
.head-tag{margin:0 0 0 8px;color:var(--muted);font-size:1rem}
.theme-btn{margin-left:auto;border:2px solid var(--rule-strong);background:transparent;color:var(--ink);width:44px;height:44px;border-radius:50%;cursor:pointer;font-size:1.1rem}
.theme-btn:hover{background:var(--signal);color:var(--signal-ink)}
.nav-bar{border-top:1px solid var(--rule);background:var(--surface)}
.main-nav{display:flex;flex-wrap:wrap;gap:0 4px;font:500 1rem/1.2 var(--body)}
.main-nav a{display:inline-flex;align-items:center;min-height:48px;padding:0 12px;text-decoration:none;font-weight:500;border-bottom:3px solid transparent}
.main-nav a:first-child{padding-left:0}
.main-nav a:hover{background:var(--signal);color:var(--signal-ink);border-bottom-color:var(--ink)}
.main-nav a[aria-current]{font-weight:600;border-bottom-color:var(--ink)}
.m-menu{display:none}
@media (max-width:900px){
  .head-tag{display:none}
  .main-nav{display:none}
  .m-menu{display:block}
  .m-menu summary{list-style:none;cursor:pointer;min-height:48px;display:flex;align-items:center;justify-content:space-between;font-weight:600;font-size:1rem}
  .m-menu summary::-webkit-details-marker{display:none}
  .m-menu summary::after{content:"+";font:600 1.5rem var(--body)}
  .m-menu[open] summary::after{content:"\2212"}
  .m-menu nav{display:flex;flex-direction:column;padding-bottom:8px}
  .m-menu nav a{display:flex;align-items:center;min-height:48px;border-top:1px solid var(--rule);text-decoration:none;font-size:1.0625rem}
  .m-menu nav a[aria-current]{font-weight:700}
  .m-menu nav a:hover{background:var(--signal);color:var(--signal-ink)}
}

/* layout */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;padding:32px 0 64px}
@media (min-width:1000px){.article-grid{grid-template-columns:minmax(0,1fr) 260px;gap:56px}}
.rail{align-self:start}
@media (min-width:1000px){.rail{position:sticky;top:16px}}
@media (max-width:999px){.rail{order:-1}}
.toc{border:1px solid var(--rule);background:var(--surface);padding:12px 16px;margin-bottom:16px}
.toc summary{cursor:pointer;font-weight:600;font-size:1rem;min-height:32px}
.toc ol{margin:8px 0 0;padding:0;list-style:none;font-size:1rem;line-height:1.4}
.toc li{border-top:1px solid var(--rule)} .toc li a{display:block;padding:10px 0;text-decoration:none}
.toc li a:hover{text-decoration:underline}
.rail-card{background:var(--surface);border:1px solid var(--rule);padding:16px;font-size:1rem;line-height:1.55}
.rail-card p{margin:.5em 0}
.rail-h{font-weight:700;font-size:1rem;margin:0 0 .4em}

/* report head */
.crumbs{font-size:1rem;color:var(--muted);margin:0 0 16px}
.crumbs a{color:var(--muted)}
.kicker{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:0 0 12px;font:500 .875rem/1.2 var(--mono);text-transform:uppercase;letter-spacing:.04em}
.tag{background:var(--ink);color:var(--bg);padding:4px 10px}
.tag-plain{background:transparent;color:var(--ink);border:2px solid var(--ink)}
.asof{color:var(--ink);background:linear-gradient(transparent 62%,var(--signal) 62%)}
:root[data-theme="dark"] .asof{color:var(--ink);background:none;border-bottom:2px solid var(--signal)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .asof{background:none;border-bottom:2px solid var(--signal)}}
h1{font:700 clamp(2.2rem,5vw,2.6rem)/1.15 var(--head);letter-spacing:-.02em;margin:.1em 0 .4em;max-width:26ch}
h2{font:700 1.6rem/1.25 var(--head);letter-spacing:-.01em;margin:2.2em 0 .6em}
h3{font:700 1.25rem/1.3 var(--head);margin:1.8em 0 .4em}
h4{font:700 1rem/1.3 var(--body);margin:0 0 .4em}
.byline{font-size:1rem;color:var(--muted);margin:0 0 24px}
.byline a{color:var(--muted)}

/* answer box */
.answer-box{background:var(--surface);border-left:8px solid var(--signal);box-shadow:0 0 0 1px var(--rule);padding:20px 24px;margin:0 0 32px;max-width:70ch}
.answer-label{font:600 .875rem/1 var(--mono);text-transform:uppercase;letter-spacing:.04em;margin:0 0 8px;color:var(--muted)}
.answer-text p{margin:0;font-size:1.1875rem;line-height:1.6}

/* score badge */
.score{display:inline-flex;align-items:baseline;gap:3px;background:var(--signal);color:var(--signal-ink);padding:6px 14px;font:700 1rem/1 var(--body);white-space:nowrap;border-radius:4px}
.score b{font-size:2rem;line-height:1;font-weight:700}
.score span{font-size:1rem;font-weight:500}
.score.big b{font-size:2.75rem}

/* verdict box */
.verdict-box{display:grid;grid-template-columns:auto 1fr;gap:24px;background:var(--surface);box-shadow:0 0 0 1px var(--rule);padding:24px;margin:0 0 32px}
.vb-score{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.vb-cap{font-size:.9rem;font-weight:600;color:var(--muted)}
.vb-head{font:700 1.25rem/1.35 var(--head);margin:0 0 16px}
.vb-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:0}
.vb-grid dt{font-weight:700;font-size:1rem;padding-bottom:4px;margin-bottom:8px;border-bottom:2px solid var(--ink)}
.vb-grid dd{margin:0;font-size:1rem;line-height:1.6}.vb-grid p{margin:0}
@media (max-width:700px){.verdict-box{grid-template-columns:1fr;padding:16px}.vb-grid{grid-template-columns:1fr}}

/* picks */
.picks{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:0 0 32px}
.pick{background:var(--surface);box-shadow:0 0 0 1px var(--rule);padding:16px}
.pick-who{font-weight:700;font-size:1rem;margin:0 0 4px}
.pick-what{margin:0;font-size:1rem;line-height:1.55}.pick-what p{margin:0}

/* leaderboard */
.board{list-style:none;margin:0 0 32px;padding:0;border-top:3px solid var(--rule-strong)}
.entry{display:grid;grid-template-columns:48px 1fr;gap:16px;padding:24px 0;border-bottom:1px solid var(--rule)}
.entry.ours{background:linear-gradient(90deg,color-mix(in srgb,var(--signal) 24%,transparent),transparent 70%)}
.entry-rank{font:700 1.5rem/1.2 var(--head);color:var(--ink)}
.entry-top{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;flex-wrap:wrap}
.entry-name{margin:0;font-size:1.375rem}
.entry-meta{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 12px;font-size:1rem}
.chip{padding:2px 10px;background:var(--tint);border-radius:4px}.chip-line{color:var(--ink)}
.entry-verdict p{margin:.5em 0}
.pc{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:16px;font-size:1rem;line-height:1.6}
.pc ul{margin:0;padding-left:1.2em}.pc li{margin:.3em 0}.pc li p{margin:0;display:inline}
@media (max-width:700px){.pc{grid-template-columns:1fr;gap:16px}.entry{grid-template-columns:36px 1fr;gap:12px}}

/* tables */
.table-wrap{overflow:auto;max-height:80vh;box-shadow:0 0 0 1px var(--rule);margin:0 0 32px;background:var(--surface);-webkit-overflow-scrolling:touch}
table{border-collapse:separate;border-spacing:0;font-size:1rem;line-height:1.5;width:100%}
th,td{padding:12px 16px;border-bottom:1px solid var(--rule);text-align:left;vertical-align:top}
tbody tr:nth-child(even) td,tbody tr:nth-child(even) th{background:var(--zebra)}
thead th{position:sticky;top:0;background:var(--ink);color:var(--bg);font:700 1rem/1.3 var(--body);z-index:2;white-space:nowrap}
.compare-table tbody th{position:sticky;left:0;background:var(--tint);font-weight:700;z-index:1;min-width:140px}
.compare-table tbody tr:nth-child(even) th{background:var(--tint)}
.compare-table thead th:first-child{left:0;z-index:3}
.prose table{display:block;overflow-x:auto;max-width:100%;margin:1.5em 0 2em;box-shadow:0 0 0 1px var(--rule);background:var(--surface);-webkit-overflow-scrolling:touch}
.prose thead th{position:static}
.prose td:first-child,.prose th:first-child{position:sticky;left:0;background:var(--tint);font-weight:700;min-width:130px;z-index:1}
.prose tbody tr:nth-child(even) td:first-child{background:var(--tint)}
.prose thead th:first-child{background:var(--ink);z-index:2}
.prose td,.prose th{min-width:96px}
td.yes{font-weight:700;background:color-mix(in srgb,var(--signal) 60%,transparent)!important;color:var(--signal-ink);text-align:center}
td.no{color:var(--muted);text-align:center;font-weight:600}
:root[data-theme="dark"] td.yes{color:var(--signal-ink)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) td.yes{color:var(--signal-ink)}}
.key-facts{margin:0 0 32px;box-shadow:0 0 0 1px var(--rule);background:var(--surface);display:block;overflow-x:auto;max-width:100%}
.key-facts td{min-width:180px}
.key-facts caption{caption-side:top;text-align:left;font:700 1rem var(--body);padding:12px 16px;background:var(--ink);color:var(--bg)}
.key-facts th{width:34%;font-weight:700;background:var(--tint)}

/* prose */
.prose{max-width:70ch}
.prose>*:first-child{margin-top:0}
.prose p,.prose li{font-size:var(--fs)}
.prose p{margin:0 0 1em}
.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1.2em}.prose li{margin:.4em 0}
.prose img{box-shadow:0 0 0 1px var(--rule);margin:1.5em 0 .4em;background:var(--surface)}
.prose img+em{display:block;font-size:1rem;color:var(--muted);margin:0 0 1.5em}
.prose blockquote{margin:1.5em 0;padding:.4em 1.2em;border-left:6px solid var(--signal);background:var(--surface)}
.prose code{font-family:var(--mono);font-size:.9em;background:var(--tint);padding:2px 6px;border-radius:3px}
.prose strong{font-weight:600}

/* steps / faq */
.steps{margin:2em 0}.step-list{padding-left:1.2em}.step-name{margin:1em 0 .3em}
.faqs{margin:3em 0 0;max-width:70ch}
.faqs h2{margin-top:0}
.faq-item{border-bottom:1px solid var(--rule)}
.faq-item summary{cursor:pointer;font:700 1.125rem/1.4 var(--head);padding:16px 36px 16px 0;list-style:none;position:relative;min-height:48px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:4px;top:12px;font:600 1.5rem var(--body)}
.faq-item[open] summary::after{content:"\2212"}
.faq-item summary:hover{text-decoration:underline}
.faq-a{padding:0 0 16px}.faq-a p{margin:.5em 0}

/* related */
.related{margin-top:3em}
.related ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.related li{background:var(--surface);box-shadow:0 0 0 1px var(--rule)}
.related a{display:block;padding:16px;text-decoration:none;height:100%}
.related a:hover{background:var(--signal);color:var(--signal-ink)}
.r-title{display:block;font:700 1.0625rem/1.3 var(--head);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.r-desc{display:block;font-size:1rem;line-height:1.5;color:var(--muted);margin-top:6px}
.related a:hover .r-desc{color:var(--signal-ink)}
.disclosure{margin-top:3em;font-size:1rem;color:var(--muted);max-width:70ch;border-top:1px solid var(--rule);padding-top:16px}
.disclosure a{color:var(--muted)}

/* index lists (hubs) */
.index-list{list-style:none;padding:0;margin:0;border-top:2px solid var(--rule-strong)}
.index-list a{display:grid;grid-template-columns:96px 1fr;column-gap:16px;padding:16px 0;border-bottom:1px solid var(--rule);text-decoration:none}
.index-list a:hover{background:var(--signal);color:var(--signal-ink)}
.ix-type{font:600 .875rem/1.4 var(--mono);text-transform:uppercase;letter-spacing:.02em;color:var(--muted);padding-top:4px;grid-row:span 2}
.ix-title{font:700 1.1875rem/1.35 var(--head);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.ix-desc{font-size:1rem;line-height:1.5;color:var(--muted)}
.index-list a:hover .ix-type,.index-list a:hover .ix-desc{color:var(--signal-ink)}
@media (max-width:560px){.index-list a{grid-template-columns:1fr}.ix-type{grid-row:auto;padding:0 0 4px}}
.cat-block{margin:0 0 16px}
.cat-block h2{margin-top:2em}
.cat-block h2 a{text-decoration-thickness:2px}
.sub-stat{font-weight:600;font-size:1rem;color:var(--muted)}
.sub-list{list-style:none;margin:0;padding:0;border-top:2px solid var(--rule-strong)}
.sub-list li{display:grid;gap:4px;padding:16px 0;border-bottom:1px solid var(--rule)}
.sub-name{font:700 1.1875rem/1.3 var(--head)}
.sub-desc{font-size:1rem}

/* home */
.hero{background:var(--surface);border-bottom:1px solid var(--rule)}
.hero-grid{display:grid;gap:32px;padding:48px 0}
@media (min-width:900px){.hero-grid{grid-template-columns:1.5fr 1fr;align-items:center;gap:64px;padding:64px 0}}
.hero h1{font-size:clamp(2.2rem,5vw,2.6rem);max-width:22ch}
.lede{font-size:1.25rem;line-height:1.55;max-width:56ch;margin:0}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin:32px 0 0}
.btn{display:inline-flex;align-items:center;min-height:48px;background:var(--ink);color:var(--bg);padding:0 24px;text-decoration:none;font:600 1rem var(--body);border:2px solid var(--ink)}
.btn:hover{background:var(--signal);color:var(--signal-ink)}
.btn-line{background:transparent;color:var(--ink)}
.hero-sheet{background:var(--bg);box-shadow:0 0 0 1px var(--rule);padding:24px}
.hs-h{font-weight:700;font-size:1rem;margin:0 0 16px}
.hs-row{display:grid;grid-template-columns:100px 1fr 32px;gap:12px;align-items:center;font-size:1rem;margin:12px 0}
.hs-row i{display:block;height:12px;width:var(--w);background:var(--ink)}
.hs-row:first-of-type i{background:var(--signal);outline:1px solid var(--ink)}
.hs-row b{text-align:right}
.hs-total{display:flex;justify-content:space-between;align-items:center;border-top:2px solid var(--rule-strong);margin-top:16px;padding-top:16px;font-weight:700}
.home-body{padding:16px 0 64px}
.home-sec{margin:48px 0 0}
.home-sec>h2{margin:0 0 16px}
.home-sec .table-wrap{margin-bottom:0}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;margin:0 0 24px}
.tiles-3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.tile{background:var(--surface);box-shadow:0 0 0 1px var(--rule);padding:24px;border-top:4px solid var(--signal)}
.tile h3{margin:0 0 8px;font-size:1.25rem}
.tile p{margin:0 0 12px;font-size:1rem;line-height:1.55}
.tile ul{margin:0;padding:0;list-style:none;border-top:1px solid var(--rule)}
.tile li{padding:10px 0;border-bottom:1px solid var(--rule);font-size:1rem;font-weight:600}
.tile-n{display:block;font-weight:400;color:var(--muted);font-size:1rem}
.link-list{list-style:none;margin:0;padding:0;border-top:2px solid var(--rule-strong)}
.link-list li{display:grid;gap:2px;padding:14px 0;border-bottom:1px solid var(--rule)}
.link-list a{font:700 1.1875rem/1.35 var(--head)}
.link-list span{font-size:1rem;line-height:1.5;color:var(--muted);max-width:70ch}
.home-sec.prose{max-width:70ch}

/* footer */
.site-foot{border-top:1px solid var(--rule-strong);background:var(--surface);padding:48px 0 24px;margin-top:0}
.foot-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:760px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr}}
.foot-brand{font:700 1.375rem var(--head);margin:0 0 8px}
.foot-h{font:700 1rem var(--body);margin:0 0 8px}
.site-foot .muted{color:var(--muted);font-size:1rem}
.site-foot ul{list-style:none;padding:0;margin:0;font-size:1rem}.site-foot li{margin:0}
.site-foot li a{display:inline-block;padding:10px 0}
.legal{margin-top:32px;border-top:1px solid var(--rule);padding-top:16px;font-size:1rem}
@media print{.site-head,.rail,.site-foot{display:none}}