/* RozContent Study Blog — 2026 redesign stylesheet (production, rolled out 2026-10-22)
   Direction: dark-first premium editorial. Fraunces (display serif) + Inter (UI/body).
   Palette: Ink #07060C · Cell #100E1A · Paper #F6F3EC · Amber #FFB340 · Coral #FF6A4D · Violet #8B7CFF */
@font-face{font-family:'Fraunces';src:url('../fonts/fraunces-var.woff2') format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:'Inter';src:url('../fonts/inter-var.woff2') format('woff2');font-weight:100 900;font-display:swap}
:root{
  --bg:#07060C; --bg2:#0B0A13; --cell:#100E1A; --cell2:#161326; --line:rgba(238,233,255,.09);
  --txt:#F6F3EC; --mut:#A8A4B8; --dim:#6E6A82;
  --amber:#FFB340; --coral:#FF6A4D; --violet:#8B7CFF;
  --grad:linear-gradient(92deg,var(--amber),var(--coral) 55%,var(--violet));
  --rad:20px; --rad-s:14px;
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --sans:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:var(--sans);line-height:1.65;font-size:16.5px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background:
   radial-gradient(900px 480px at 12% -6%,rgba(139,124,255,.16),transparent 60%),
   radial-gradient(820px 460px at 88% -10%,rgba(255,106,77,.12),transparent 60%),
   radial-gradient(700px 500px at 50% 115%,rgba(255,179,64,.07),transparent 60%)}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:60;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E")}
a{color:var(--amber)}
::selection{background:rgba(255,179,64,.35)}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px;position:relative;z-index:1}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:6px}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:50;background:rgba(9,8,16,.72);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;justify-content:space-between;align-items:center;padding-top:14px;padding-bottom:14px;gap:16px}
.logo{font-family:var(--serif);font-weight:800;font-size:21px;color:var(--txt);text-decoration:none;letter-spacing:-.01em;white-space:nowrap}
.logo b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
.logo em{font-style:italic;font-weight:560;color:var(--mut);font-size:16px;margin-left:7px}
nav.main{display:flex;gap:4px;flex-wrap:wrap}
nav.main a{color:var(--mut);text-decoration:none;font-size:14px;font-weight:550;padding:7px 11px;border-radius:99px;transition:.25s}
nav.main a:hover{color:var(--txt);background:rgba(255,255,255,.06)}

/* ---------- shared bits ---------- */
.kicker{display:inline-flex;align-items:center;gap:8px;color:var(--amber);font-weight:700;letter-spacing:.14em;font-size:11.5px;text-transform:uppercase}
.kicker::before{content:"";width:22px;height:2px;background:var(--grad);border-radius:2px}
.no-badge{font-family:var(--serif);font-style:italic;font-weight:600;font-size:12.5px;letter-spacing:.06em;color:var(--violet);
  border:1px solid rgba(139,124,255,.4);padding:3px 10px;border-radius:99px;background:rgba(139,124,255,.08);white-space:nowrap}
.tagchip{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber)}
.btn{display:inline-flex;align-items:center;gap:9px;background:var(--grad);color:#17110A;font-weight:700;font-size:15px;
  padding:12px 22px;border-radius:99px;text-decoration:none;border:0;cursor:pointer;transition:transform .25s,box-shadow .25s;box-shadow:0 8px 26px -10px rgba(255,140,66,.55)}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 32px -10px rgba(255,140,66,.65)}
.btn.ghost{background:rgba(255,255,255,.04);color:var(--txt);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:rgba(255,179,64,.55);color:var(--amber)}
.btn.sm{padding:9px 16px;font-size:13.5px}
html.js .rv{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.65,.25,1),transform .8s cubic-bezier(.2,.65,.25,1)}
html.js .rv.in{opacity:1;transform:none}

/* ---------- homepage hero ---------- */
.hero{padding:74px 0 10px;text-align:left}
.hero h1{font-family:var(--serif);font-weight:640;font-size:clamp(42px,6.4vw,74px);line-height:1.04;letter-spacing:-.015em;max-width:900px;margin:20px 0 20px}
.hero h1 .hl{font-style:italic;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lede{color:var(--mut);font-size:18.5px;line-height:1.65;max-width:660px}
.searchbar{margin:32px 0 6px;max-width:640px;position:relative}
.searchbar input{width:100%;background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:99px;
  padding:16px 22px 16px 52px;color:var(--txt);font:inherit;font-size:16px;transition:.25s}
.searchbar input::placeholder{color:var(--dim)}
.searchbar input:focus{outline:none;border-color:rgba(255,179,64,.6);background:rgba(255,255,255,.07);box-shadow:0 0 0 4px rgba(255,179,64,.12)}
.searchbar svg{position:absolute;left:19px;top:50%;transform:translateY(-50%);opacity:.55}
.search-hint{color:var(--dim);font-size:13px;margin-top:9px}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:38px 0 8px}
.stat{background:linear-gradient(180deg,var(--cell2),var(--cell));border:1px solid var(--line);border-radius:var(--rad-s);padding:18px 18px 14px}
.stat .num{font-family:var(--serif);font-weight:760;font-size:36px;line-height:1;letter-spacing:-.01em}
.stat .num sup{font-size:15px;color:var(--amber);font-family:var(--sans);font-weight:700;vertical-align:super}
.stat .lbl{color:var(--mut);font-size:12.5px;margin-top:7px;line-height:1.45}
.stats-note{color:var(--dim);font-size:12.5px;margin-top:10px}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:1.65fr 1fr;gap:14px;margin:30px 0 6px}
.bento .cell{background:linear-gradient(165deg,var(--cell2),var(--cell) 60%);border:1px solid var(--line);border-radius:var(--rad);padding:28px;position:relative;overflow:hidden}
.bento .stack{display:grid;gap:14px}
.feat{text-decoration:none;display:flex;flex-direction:column;min-height:100%}
.feat::after{content:"";position:absolute;inset:0;background:radial-gradient(420px 240px at 85% 0%,rgba(255,179,64,.13),transparent 65%);pointer-events:none}
.feat .row1{display:flex;justify-content:space-between;align-items:center;gap:10px}
.feat .strip{margin-top:auto;padding-top:20px;border-top:1px dashed rgba(238,233,255,.14);display:flex;gap:26px;flex-wrap:wrap}
.feat .strip .cell b{font-family:var(--serif);font-size:24px;font-weight:740;display:block;line-height:1.1}
.feat .strip .cell span{color:var(--dim);font-size:12px}
.feat h2{font-family:var(--serif);font-weight:620;font-size:clamp(27px,3.2vw,38px);line-height:1.14;letter-spacing:-.01em;color:var(--txt);margin:38px 0 12px}
.feat p{color:var(--mut);font-size:15.5px;max-width:56ch}
.feat .meta{display:flex;gap:14px;align-items:center;margin-top:20px;color:var(--dim);font-size:13.5px}
.feat .go{color:var(--amber);font-weight:700}
.feat .go i{font-style:normal;display:inline-block;transition:transform .25s}
a.feat:hover .go i{transform:translateX(5px)}
.path h3,.shelf h3{font-family:var(--serif);font-size:19px;font-weight:640;margin-bottom:14px}
.path ol{list-style:none;counter-reset:step}
.path li{counter-increment:step;margin-bottom:12px}
.path li:last-child{margin-bottom:0}
.path a{display:flex;gap:12px;align-items:baseline;color:var(--txt);text-decoration:none;font-weight:580;font-size:15px;line-height:1.4;transition:.2s}
.path a::before{content:counter(step,decimal-leading-zero);font-family:var(--serif);font-style:italic;color:var(--coral);font-weight:700;font-size:14px}
.path a:hover{color:var(--amber)}
.path a small{display:block;color:var(--mut);font-weight:450;font-size:13px;margin-top:2px}
.shelf a{display:flex;justify-content:space-between;gap:10px;color:var(--mut);text-decoration:none;font-size:14.5px;padding:9px 0;border-bottom:1px dashed rgba(238,233,255,.1);transition:.2s}
.shelf a:last-child{border-bottom:0}
.shelf a:hover{color:var(--txt);padding-left:5px}
.shelf a span{color:var(--dim);font-size:12.5px;white-space:nowrap}

/* ---------- filter + grid ---------- */
.filterbar{position:sticky;top:63px;z-index:40;background:rgba(7,6,12,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:14px 0 12px;margin-top:34px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.chips{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.chip{font:inherit;font-size:13.5px;font-weight:600;color:var(--mut);background:rgba(255,255,255,.04);border:1px solid var(--line);
  padding:8px 15px;border-radius:99px;cursor:pointer;transition:.22s}
.chip:hover{color:var(--txt);border-color:rgba(255,179,64,.45)}
.chip.on{background:var(--grad);color:#17110A;border-color:transparent}
.chip .n{opacity:.65;font-weight:500;margin-left:4px}
.showcount{color:var(--dim);font-size:13.5px;margin-left:auto}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:26px 0 8px}
.card{background:linear-gradient(170deg,var(--cell2),var(--cell) 65%);border:1px solid var(--line);border-radius:var(--rad);
  padding:24px;text-decoration:none;display:flex;flex-direction:column;position:relative;overflow:hidden;
  transition:transform .35s cubic-bezier(.2,.65,.25,1),border-color .35s,box-shadow .35s}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:var(--grad);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s}
.card:hover{transform:translateY(-6px);border-color:transparent;box-shadow:0 22px 44px -18px rgba(0,0,0,.75)}
.card:hover::before{opacity:1}
.card .top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px}
.card h3{font-family:var(--serif);font-weight:600;font-size:20.5px;line-height:1.28;letter-spacing:-.005em;color:var(--txt);margin-bottom:9px}
.card p{color:var(--mut);font-size:14px;line-height:1.6;flex:1}
.card .foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px;color:var(--dim);font-size:13px}
.card .arr{font-size:17px;color:var(--amber);transition:transform .3s}
.card:hover .arr{transform:translate(3px,-3px)}
.card.hide{display:none}
.empty{display:none;border:1px dashed rgba(238,233,255,.2);border-radius:var(--rad);padding:38px;text-align:center;color:var(--mut);margin:8px 0 20px}
.empty.show{display:block}
.empty b{color:var(--txt);font-family:var(--serif);font-size:20px;display:block;margin-bottom:6px}

/* ---------- CTA + footer ---------- */
.cta{position:relative;background:linear-gradient(140deg,#1B1430,#100E1A 55%);border:1px solid rgba(255,179,64,.35);border-radius:24px;
  padding:40px;margin:46px 0 10px;overflow:hidden}
.cta::after{content:"";position:absolute;inset:0;background:radial-gradient(480px 240px at 90% 0%,rgba(255,106,77,.16),transparent 65%);pointer-events:none}
.cta h3{font-family:var(--serif);font-size:clamp(24px,3vw,31px);font-weight:640;margin:0 0 10px;position:relative;z-index:1}
.cta p{color:var(--mut);margin-bottom:20px;max-width:62ch;position:relative;z-index:1}
.cta .btns{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:1}
footer.site{border-top:1px solid var(--line);margin-top:56px;padding:38px 0 44px;color:var(--mut);font-size:14px;background:var(--bg2)}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
footer.site a{color:var(--mut);text-decoration:none}
footer.site a:hover{color:var(--amber)}
footer.site .fbrand{font-family:var(--serif);font-size:19px;color:var(--txt);margin-bottom:8px}
footer.site h4{color:var(--txt);font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px}
footer.site li{list-style:none;margin-bottom:8px}
footer.site .fine{margin-top:30px;padding-top:18px;border-top:1px solid var(--line);color:var(--dim);font-size:13px;line-height:1.6}

/* ---------- article page ---------- */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--grad);z-index:80;border-radius:0 3px 3px 0}
.art-hero{padding:58px 0 6px}
.art-hero h1{font-family:var(--serif);font-weight:640;font-size:clamp(33px,4.6vw,54px);line-height:1.1;letter-spacing:-.015em;margin:18px 0 16px;max-width:20em}
.art-hero .standfirst{color:var(--mut);font-size:18.5px;line-height:1.62;max-width:700px}
.art-meta{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;margin-top:24px;color:var(--mut);font-size:14px}
.art-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--dim)}
.share{display:flex;gap:9px;margin-top:22px;flex-wrap:wrap}
.share button,.share a{display:inline-flex;align-items:center;gap:8px;font:inherit;font-size:13.5px;font-weight:600;color:var(--mut);
  background:rgba(255,255,255,.045);border:1px solid var(--line);padding:9px 15px;border-radius:99px;cursor:pointer;text-decoration:none;transition:.22s}
.share button:hover,.share a:hover{color:var(--txt);border-color:rgba(255,179,64,.5)}
.share .ok{color:var(--amber);border-color:rgba(255,179,64,.55)}
.art-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:44px;align-items:start;padding:26px 0 0}
aside.toc{position:sticky;top:96px}
aside.toc h4{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--dim);margin-bottom:13px}
aside.toc a{display:block;color:var(--mut);text-decoration:none;font-size:13.8px;line-height:1.45;padding:6px 0 6px 15px;border-left:2px solid rgba(238,233,255,.12);transition:.2s}
aside.toc a:hover{color:var(--txt)}
aside.toc a.act{color:var(--amber);border-left-color:var(--amber);font-weight:600}
article.body{max-width:740px}
article.body p{margin-bottom:16px;color:#DCD8EA;font-size:17px;line-height:1.78}
article.body h2{font-family:var(--serif);font-weight:620;font-size:29px;line-height:1.22;letter-spacing:-.01em;margin:42px 0 14px;scroll-margin-top:96px}
article.body h3{font-size:19px;margin:24px 0 9px}
article.body ul,article.body ol{margin:0 0 18px 22px;color:#DCD8EA;font-size:17px;line-height:1.72}
article.body li{margin-bottom:8px}
article.body a{color:var(--amber);text-decoration-color:rgba(255,179,64,.4);text-underline-offset:3px}
article.body strong{color:var(--txt)}
article.body .answer{background:linear-gradient(165deg,var(--cell2),var(--cell));border:1px solid var(--line);border-left:4px solid var(--amber);
  border-radius:var(--rad-s);padding:22px 24px;margin:6px 0 26px}
article.body .answer p{font-size:16.5px}
article.body .answer p:last-child,article.body .answer ul:last-child{margin-bottom:0}
.example{background:#0A0812;border:1px solid var(--line);border-radius:var(--rad-s);padding:18px 20px;margin:0 0 18px;font-size:15.5px}
.example .lbl{color:var(--amber);font-weight:700;font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;display:block;margin-bottom:8px}
.example p{font-size:15.5px !important}
.tblwrap{overflow-x:auto;margin:0 0 20px;border:1px solid var(--line);border-radius:var(--rad-s)}
article.body table{border-collapse:collapse;width:100%;font-size:15px;min-width:520px}
article.body th,article.body td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
article.body th{background:var(--cell2);font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--mut)}
article.body tr:last-child td{border-bottom:0}

/* data explorer */
.datax{background:linear-gradient(170deg,#151126,var(--cell) 60%);border:1px solid rgba(139,124,255,.3);border-radius:24px;padding:32px;margin:44px 0 6px;max-width:740px}
.datax h2{font-family:var(--serif);font-size:27px;font-weight:640;margin-bottom:6px}
.datax .sub{color:var(--mut);font-size:14.5px;margin-bottom:26px}
.datax h5{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);margin:26px 0 13px}
.datax h5:first-of-type{margin-top:0}
.frow{display:grid;grid-template-columns:1fr auto;gap:4px 14px;margin-bottom:15px;align-items:baseline}
.frow .fl{font-size:14.5px;font-weight:580}
.frow .fv{font-family:var(--serif);font-weight:740;font-size:21px}
.frow .fv small{font-family:var(--sans);font-size:12px;color:var(--mut);font-weight:600;margin-left:5px}
.fbar{grid-column:1/-1;height:11px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden}
.fbar i{display:block;height:100%;width:0;border-radius:99px;background:var(--grad);transition:width 1.3s cubic-bezier(.2,.7,.2,1)}
.bars .brow{margin-bottom:14px}
.bars .btop{display:flex;justify-content:space-between;font-size:14.5px;margin-bottom:6px}
.bars .btop b{font-family:var(--serif);font-size:18px}
.bars .bar{height:10px;background:rgba(255,255,255,.06);border-radius:99px;overflow:hidden}
.bars .bar i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--violet),var(--coral));transition:width 1.2s cubic-bezier(.2,.7,.2,1)}
.bars .bcap{color:var(--dim);font-size:12.5px;margin-top:5px}
.split{display:flex;height:34px;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.split .s1{background:linear-gradient(90deg,#3E5CFF,#7C6CFF);display:flex;align-items:center;padding:0 13px;font-size:12.5px;font-weight:700;color:#fff;white-space:nowrap;overflow:hidden}
.split .s2{background:rgba(255,179,64,.85);display:flex;align-items:center;padding:0 13px;font-size:12.5px;font-weight:700;color:#241703;white-space:nowrap;overflow:hidden}
.legend{display:flex;gap:20px;flex-wrap:wrap;margin-top:10px;color:var(--mut);font-size:13px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px}
.chips3{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:6px}
.chips3 .c3{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--rad-s);padding:15px}
.chips3 .c3 b{font-family:var(--serif);font-size:23px;display:block}
.chips3 .c3 span{color:var(--mut);font-size:12.5px;line-height:1.45;display:block;margin-top:3px}

/* faq / team / next */
.faqx{max-width:740px;margin-top:44px}
.faqx h2{font-family:var(--serif);font-size:27px;font-weight:640;margin-bottom:16px}
details.qa{background:var(--cell);border:1px solid var(--line);border-radius:var(--rad-s);margin-bottom:10px;overflow:hidden}
details.qa summary{cursor:pointer;list-style:none;padding:17px 20px;font-weight:620;font-size:16px;display:flex;justify-content:space-between;gap:14px;align-items:center}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{content:"+";font-family:var(--serif);font-size:22px;color:var(--amber);transition:transform .3s}
details.qa[open ] summary::after{transform:rotate(45deg)}
details.qa .qa-body{padding:0 20px 18px;color:var(--mut);font-size:15.5px;line-height:1.7}
.teamcard{display:flex;gap:20px;align-items:flex-start;background:linear-gradient(160deg,var(--cell2),var(--cell));border:1px solid var(--line);
  border-radius:24px;padding:28px;margin:42px 0 6px;max-width:740px}
.teamcard .ava{width:58px;height:58px;flex:none;border-radius:17px;background:var(--grad);display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-weight:900;font-size:24px;color:#17110A}
.teamcard h3{font-family:var(--serif);font-size:21px;font-weight:640;margin-bottom:5px}
.teamcard p{color:var(--mut);font-size:14.8px;line-height:1.65}
.readnext{margin-top:48px}
.readnext h2{font-family:var(--serif);font-size:27px;font-weight:640;margin-bottom:18px}
.readnext .grid{padding:0}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(3,1fr)}
  .art-layout{grid-template-columns:1fr}
  aside.toc{position:static;order:0;background:var(--cell);border:1px solid var(--line);border-radius:var(--rad-s);padding:18px 20px}
  aside.toc a{border-left:0;padding-left:0;display:inline-block;margin:0 14px 6px 0}
}
@media (max-width:680px){
  .grid{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .chips3{grid-template-columns:1fr}
  .hero{padding:48px 0 6px}
  .filterbar{top:57px}
  .showcount{margin-left:0;width:100%}
  footer.site .cols{grid-template-columns:1fr}
  .teamcard{flex-direction:column}
  header.site .wrap{flex-direction:column;align-items:flex-start;gap:7px;padding-top:12px;padding-bottom:12px}
  nav.main{flex-wrap:nowrap;overflow-x:auto;max-width:100%;padding-bottom:2px;scrollbar-width:none}
  nav.main::-webkit-scrollbar{display:none}
  nav.main a{padding:7px 9px;font-size:13.5px;white-space:nowrap}
  .logo em{display:none}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  html.js .rv{opacity:1;transform:none}
}