/* ===== B3 ventures — editorial system, adapted from blog.bbyb.dev ===== */

:root{
  --bg:#ffffff; --bg-soft:#fafafa; --bg-sunk:#f5f5f5;
  --ink:#0a0a0a; --ink-2:#1d1d1f; --muted:#6e6e73; --muted-2:#86868b;
  --line:rgba(0,0,0,.1); --line-soft:rgba(0,0,0,.06);
  --accent:#0a0a0a; --chip:rgba(0,0,0,.04);
  --violet:#6d4fd4; --violet-wash:rgba(124,92,224,.08);
  --good:#1c7c3f; --good-wash:rgba(28,124,63,.08);
  --warn:#9a6a00; --warn-wash:rgba(184,134,11,.1);
  --risk:#b3261e; --risk-wash:rgba(179,38,30,.07);
  --shadow-md:0 12px 40px rgba(0,0,0,.06),0 2px 8px rgba(0,0,0,.04);
  --radius:18px; --radius-sm:10px;
  --serif:"Newsreader",ui-serif,Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --maxw:1200px; --readw:680px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0a0f1c; --bg-soft:#0c1322; --bg-sunk:#111a2d;
    --ink:#f5f5f7; --ink-2:#e8e8ed; --muted:#a1a1aa; --muted-2:#71717a;
    --line:rgba(255,255,255,.1); --line-soft:rgba(255,255,255,.06);
    --accent:#f5f5f7; --chip:rgba(255,255,255,.06);
    --violet:#a78bfa; --violet-wash:rgba(167,139,250,.12);
    --good:#57c77c; --good-wash:rgba(87,199,124,.12);
    --warn:#e0b054; --warn-wash:rgba(224,176,84,.12);
    --risk:#f07570; --risk-wash:rgba(240,117,112,.12);
    --shadow-md:0 12px 40px rgba(0,0,0,.35),0 2px 8px rgba(0,0,0,.25);
  }
}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg); color:var(--ink); font-family:var(--sans);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; line-height:1.5}
a{color:inherit; text-decoration:none}
img{display:block; max-width:100%}

/* nav */
.nav{position:sticky; top:0; z-index:50;
  background:color-mix(in oklab,var(--bg) 82%,transparent);
  backdrop-filter:saturate(180%) blur(20px); -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--line-soft)}
.nav-inner{max-width:var(--maxw); margin:0 auto; padding:14px 28px; display:flex; align-items:center; gap:32px}
.brand{display:flex; align-items:center; gap:12px; font-weight:500; letter-spacing:-.01em; font-size:15px}
.brand-mark{font-family:"Unbounded",var(--sans); font-weight:900; font-size:20px; letter-spacing:-.04em; line-height:1}
.brand-divider{width:1px; height:16px; background:var(--line); margin:0 2px}
.brand-sub{color:var(--muted); font-weight:450; font-size:14px}
.nav-links{margin-left:auto; display:flex; align-items:center; gap:28px; font-size:13.5px}
.nav-links a{color:var(--muted); transition:color .16s ease}
.nav-links a:hover{color:var(--ink)}

/* home hero */
.hero{padding:80px 28px 64px; max-width:var(--maxw); margin:0 auto}
.eyebrow{font-size:12px; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--muted)}
.hero h1{font-family:var(--serif); font-weight:400; font-size:clamp(44px,7vw,84px); line-height:1.02;
  letter-spacing:-.025em; margin:18px 0 0; max-width:18ch; text-wrap:balance}
.hero h1 em{font-style:italic; font-weight:300; color:var(--muted)}
.hero-sub{max-width:58ch; font-size:19px; line-height:1.55; color:var(--muted); margin:28px 0 0}
.hero-meta{margin-top:44px; display:flex; gap:32px; align-items:baseline; flex-wrap:wrap;
  font-size:13px; color:var(--muted); border-top:1px solid var(--line-soft); padding-top:20px}
.hero-meta b{color:var(--ink-2); font-weight:500}

/* featured venture card (dark art like the blog) */
.featured{max-width:var(--maxw); margin:32px auto 72px; padding:0 28px}
.featured-card{display:block; position:relative; border-radius:var(--radius); overflow:hidden;
  background:var(--bg-sunk); aspect-ratio:16/8.5; isolation:isolate;
  transition:transform .42s cubic-bezier(.2,.7,.2,1)}
.featured-card:hover{transform:translateY(-2px)}
.featured-art{position:absolute; inset:0; overflow:hidden}
.featured-art .bgfill{position:absolute; inset:0;
  background:radial-gradient(120% 80% at 80% 20%,rgba(167,139,250,.14),transparent 60%),
             radial-gradient(100% 70% at 10% 90%,rgba(255,255,255,.05),transparent 55%),
             linear-gradient(180deg,#151515,#050505)}
.featured-art .grid-lines{position:absolute; inset:0;
  background-image:linear-gradient(to right,rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse at center,black 40%,transparent 80%)}
.featured-caption{position:absolute; left:0; right:0; bottom:0; padding:44px; color:#fff; z-index:2;
  background:linear-gradient(to top,rgba(0,0,0,.72) 0%,rgba(0,0,0,.35) 50%,transparent 100%)}
.featured-tag{display:inline-flex; align-items:center; gap:8px; font-size:12px; font-weight:500;
  letter-spacing:.08em; text-transform:uppercase; color:#ffffffd9; margin-bottom:16px}
.featured-tag::before{content:""; width:6px; height:6px; border-radius:50%; background:#fff}
.featured-card h2{font-family:var(--serif); font-weight:400; font-size:clamp(28px,4vw,48px);
  line-height:1.05; letter-spacing:-.02em; margin:0; max-width:22ch; color:#fff; text-wrap:balance}
.featured-meta{margin-top:18px; font-size:13px; color:#ffffffb8; display:flex; gap:14px; align-items:center; flex-wrap:wrap}
.featured-meta .dot{width:3px; height:3px; border-radius:50%; background:#ffffff80}

/* list sections (index) */
.section-head{max-width:var(--maxw); margin:0 auto; padding:0 28px 28px; display:flex;
  align-items:baseline; justify-content:space-between; border-bottom:1px solid var(--line-soft)}
.section-head h3{font-size:13px; font-weight:600; letter-spacing:.14em; text-transform:uppercase; margin:0; color:var(--ink-2)}
.section-head .count{font-family:var(--mono); font-size:12px; color:var(--muted)}
.posts{max-width:var(--maxw); margin:0 auto 72px; padding:0 28px}
.post{display:grid; grid-template-columns:180px 1fr 140px; gap:40px; align-items:start;
  padding:30px 0; border-bottom:1px solid var(--line-soft); transition:background .2s ease}
.post:hover{background:color-mix(in oklab,var(--ink) 3%,transparent)}
.post-topic{font-size:11px; font-weight:500; color:var(--muted); letter-spacing:.12em; text-transform:uppercase; padding-top:6px}
.post-title{font-family:var(--serif); font-size:clamp(22px,2.2vw,28px); line-height:1.18;
  letter-spacing:-.018em; font-weight:400; margin:0 0 10px; text-wrap:balance}
.post-desc{font-size:15px; line-height:1.55; color:var(--muted); margin:0; max-width:62ch}
.post-date{font-family:var(--mono); font-size:12px; color:var(--muted); text-align:right; padding-top:8px; line-height:1.6}

/* article head */
.art-head{max-width:var(--maxw); margin:0 auto; padding:48px 28px 32px}
.breadcrumb{font-size:13px; color:var(--muted); display:flex; align-items:center; gap:10px; margin-bottom:40px}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--ink-2)}
.art-topic{font-size:12px; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--muted)}
.art-title{font-family:var(--serif); font-weight:400; font-size:clamp(40px,5.5vw,72px); line-height:1.04;
  letter-spacing:-.025em; margin:18px 0 0; max-width:20ch; text-wrap:balance}
.art-deck{font-family:var(--serif); font-weight:300; font-style:italic; color:var(--muted);
  font-size:clamp(20px,2vw,26px); line-height:1.4; max-width:48ch; margin:28px 0 0}
.art-byline{margin-top:44px; padding-top:24px; border-top:1px solid var(--line-soft);
  display:flex; align-items:center; gap:24px; flex-wrap:wrap; font-size:13.5px; color:var(--muted)}
.art-byline b{color:var(--ink-2); font-weight:500}
.meta-dot{width:3px; height:3px; border-radius:50%; background:var(--muted-2)}
.chip{display:inline-flex; align-items:center; font-size:11px; font-weight:600; letter-spacing:.08em;
  text-transform:uppercase; padding:5px 11px; border-radius:999px; font-family:var(--sans)}
.chip.good{background:var(--good-wash); color:var(--good)}
.chip.warn{background:var(--warn-wash); color:var(--warn)}
.chip.risk{background:var(--risk-wash); color:var(--risk)}
.chip.violet{background:var(--violet-wash); color:var(--violet)}

/* article body */
.art-body{max-width:var(--readw); margin:64px auto 0; padding:0 28px;
  font-family:var(--serif); font-size:19px; line-height:1.62; color:var(--ink-2); letter-spacing:-.003em}
.art-body>*+*{margin-top:1.4em}
.art-body p{margin:0}
.art-body .lede::first-letter{font-size:4.2em; float:left; line-height:.9; margin:.05em .12em 0 -.04em; color:var(--ink)}
.art-body h2{font-family:var(--serif); font-weight:500; font-size:30px; line-height:1.15;
  letter-spacing:-.02em; margin-top:2.2em; margin-bottom:.4em; color:var(--ink)}
.art-body h3{font-family:var(--sans); font-weight:600; font-size:14px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--muted); margin-top:2em; margin-bottom:-.2em}
.art-body a{border-bottom:1px solid color-mix(in oklab,var(--ink) 30%,transparent); transition:border-color .16s}
.art-body a:hover{border-bottom-color:var(--ink)}
.art-body strong{font-weight:600; color:var(--ink)}
.art-body blockquote{margin:2.2em 0; padding-left:26px; border-left:2px solid var(--ink);
  font-style:italic; color:var(--ink); font-size:23px; line-height:1.45; letter-spacing:-.01em}
.art-body blockquote cite{display:block; margin-top:14px; font-style:normal; font-family:var(--sans);
  font-size:13px; color:var(--muted); font-weight:500}
.art-body ul{padding-left:20px; margin:0}
.art-body ul li{margin:.55em 0; padding-left:6px}
.art-body ul li::marker{color:var(--muted-2)}
.art-body .fine{font-family:var(--sans); font-size:13.5px; color:var(--muted); line-height:1.55}

/* stats (serif numbers) */
.stats{display:grid; grid-template-columns:repeat(3,1fr); gap:32px; margin:2.4em 0;
  padding:32px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.stat-num{font-family:var(--serif); font-weight:400; font-size:46px; line-height:1; letter-spacing:-.03em; color:var(--ink)}
.stat-num .unit{font-size:20px; color:var(--muted); margin-left:3px; font-style:italic}
.stat-lbl{font-family:var(--sans); font-size:13px; color:var(--muted); margin-top:10px; line-height:1.45}

/* figure boxes + tables */
.figure{margin:2.2em 0; padding:24px; background:var(--bg-soft); border:1px solid var(--line-soft); border-radius:14px}
.figure-cap{font-family:var(--sans); font-size:12.5px; color:var(--muted); margin-top:14px}
.figure-cap b{color:var(--ink-2); font-weight:600}
.figure.alert{background:var(--warn-wash); border-color:color-mix(in oklab,var(--warn) 30%,transparent)}
.figure.alert p{font-family:var(--sans); font-size:15px; line-height:1.55; color:var(--ink-2); margin:0}
.figure.alert p b{color:var(--ink)}
.figure.alert .cap-tag{font-size:11px; font-weight:600; letter-spacing:.1em; text-transform:uppercase;
  color:var(--warn); font-family:var(--sans); display:block; margin-bottom:10px}
.tablewrap{margin:2.2em 0; overflow-x:auto; border:1px solid var(--line-soft); border-radius:14px; background:var(--bg-soft)}
table.ed{border-collapse:collapse; width:100%; min-width:600px; font-family:var(--sans); font-size:14px}
table.ed th,table.ed td{text-align:left; padding:14px 16px; border-bottom:1px solid var(--line-soft); vertical-align:top; line-height:1.5}
table.ed thead th{font-size:10.5px; letter-spacing:.11em; text-transform:uppercase; color:var(--muted); font-weight:600}
table.ed tbody tr:last-child td{border-bottom:0}
table.ed tbody tr.key td{background:var(--violet-wash)}
table.ed td p{margin:0; color:var(--muted)}
table.ed .co{font-weight:600; color:var(--ink)}
table.ed .note{color:var(--muted-2); font-size:12.5px}
.mini{font-size:10px; letter-spacing:.06em; padding:3px 8px; border-radius:6px; font-weight:600;
  display:inline-block; white-space:nowrap; text-transform:uppercase; font-family:var(--sans)}
.mini.yes{background:var(--risk-wash); color:var(--risk)}
.mini.part{background:var(--warn-wash); color:var(--warn)}
.mini.no{background:var(--chip); color:var(--muted)}

/* numbered steps */
.steps{counter-reset:s; margin:2.2em 0; padding:0; list-style:none; font-family:var(--sans)}
.steps li{display:grid; grid-template-columns:auto 1fr; gap:20px; align-items:baseline;
  padding:22px 0; border-bottom:1px solid var(--line-soft)}
.steps li:last-child{border-bottom:0}
.steps li::before{counter-increment:s; content:counter(s,decimal-leading-zero);
  font-family:var(--mono); font-size:13px; color:var(--muted-2); padding-top:3px}
.steps h4{margin:0 0 4px; font-size:16px; font-weight:600; color:var(--ink)}
.steps p{margin:0; font-size:14.5px; color:var(--muted); line-height:1.55}
.steps .who{display:block; margin-top:8px; font-size:11px; font-weight:600; letter-spacing:.1em;
  text-transform:uppercase; color:var(--muted-2)}
.steps li.gate::before{color:var(--warn)}
.steps li.gate .who{color:var(--warn)}

/* score rows (hypotheses) */
.score{margin:2.2em 0; font-family:var(--sans)}
.score-row{display:grid; grid-template-columns:auto 1fr auto; gap:20px; align-items:start;
  padding:20px 0; border-bottom:1px solid var(--line-soft)}
.score-row:last-child{border-bottom:0}
.score-row .id{font-family:var(--mono); font-size:13px; color:var(--muted-2); padding-top:2px}
.score-row h4{margin:0 0 4px; font-size:16px; font-weight:600; color:var(--ink)}
.score-row p{margin:0; font-size:14.5px; color:var(--muted); line-height:1.55}

/* read next */
.read-next{max-width:var(--maxw); margin:100px auto 0; padding:56px 28px 0; border-top:1px solid var(--line-soft)}
.rn-head{display:flex; align-items:baseline; justify-content:space-between; margin-bottom:36px}
.rn-head h4{font-size:13px; font-weight:600; letter-spacing:.14em; text-transform:uppercase; margin:0; color:var(--ink-2)}
.rn-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:44px}
.rn-card{border-top:1px solid var(--line); padding-top:20px; transition:transform .24s ease; display:block}
.rn-card:hover{transform:translateY(-2px)}
.rn-card .rn-topic{font-size:12px; font-weight:500; color:var(--ink-2); letter-spacing:.04em; text-transform:uppercase; margin-bottom:12px}
.rn-card h5{font-family:var(--serif); font-weight:400; font-size:22px; line-height:1.2; letter-spacing:-.015em; margin:0; text-wrap:balance}
.rn-card .rn-meta{margin-top:14px; font-size:12.5px; color:var(--muted)}

/* footer */
footer.site{max-width:var(--maxw); margin:96px auto 0; padding:32px 28px 64px; border-top:1px solid var(--line-soft);
  display:flex; align-items:center; justify-content:space-between; gap:20px; color:var(--muted); font-size:12.5px; flex-wrap:wrap}
footer.site a:hover{color:var(--ink)}

/* reveal */
.reveal{opacity:1; transform:none; transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}

/* ===== mobile ===== */
@media (max-width:960px){
  :root{--maxw:100%}
  .hero{padding:56px 24px 40px}
  .featured{margin-bottom:56px; padding:0 24px}
  .featured-card{aspect-ratio:16/10}
  .featured-caption{padding:28px}
  .section-head,.posts,footer.site{padding-left:24px; padding-right:24px}
  .nav-inner{padding:12px 20px; gap:16px}
  .nav-links{gap:18px; font-size:13px}
  .art-head{padding:36px 24px 24px}
  .art-body{padding:0 24px; margin-top:48px}
  .read-next{padding:48px 24px 0; margin-top:80px}
}
@media (max-width:900px){ .rn-grid{grid-template-columns:1fr; gap:32px} }
@media (max-width:820px){
  .post{grid-template-columns:1fr; gap:8px; padding:24px 0}
  .post-date{text-align:left; padding-top:0}
}
@media (max-width:700px){
  .hero{padding:40px 20px 28px}
  .hero h1{font-size:clamp(34px,9vw,52px); max-width:100%}
  .hero-sub{font-size:16px; margin-top:20px}
  .hero-meta{gap:12px 24px; font-size:12px}
  .featured{padding:0 20px; margin-bottom:44px}
  .featured-card{aspect-ratio:4/5; border-radius:14px}
  .featured-caption{padding:22px}
  .featured-card h2{font-size:24px}
  .featured-meta{font-size:11.5px; gap:10px}
  .section-head{padding:0 20px 18px}
  .posts{padding:0 20px; margin-bottom:52px}
  .post-title{font-size:21px}
  .post-desc{font-size:14px}
  .nav-inner{padding:10px 16px; gap:12px}
  .brand-divider{display:none}
  .brand-sub{display:none}
  .nav-links{gap:14px; font-size:12.5px}
  .art-head{padding:28px 20px 20px}
  .breadcrumb{margin-bottom:24px; flex-wrap:wrap; gap:6px}
  .art-title{font-size:clamp(30px,9vw,44px); max-width:100%}
  .art-deck{font-size:17px; margin-top:18px}
  .art-byline{gap:12px; font-size:12.5px; margin-top:28px; padding-top:18px}
  .art-byline .meta-dot{display:none}
  .art-body{font-size:17px; line-height:1.65; padding:0 20px; margin-top:36px}
  .art-body h2{font-size:25px; margin-top:1.8em}
  .art-body blockquote{font-size:19px; padding-left:20px; margin:1.8em 0}
  .art-body .lede::first-letter{font-size:3.4em}
  .stats{grid-template-columns:1fr; gap:18px; padding:22px 0}
  .stat-num{font-size:40px}
  .figure{padding:18px; border-radius:10px}
  .tablewrap{border-radius:10px}
  .steps li{grid-template-columns:1fr; gap:6px; padding:18px 0}
  .score-row{grid-template-columns:1fr; gap:8px}
  .score-row .chip{justify-self:start}
  .read-next{padding:40px 20px 0; margin-top:64px}
  .rn-grid{grid-template-columns:1fr; gap:28px}
  footer.site{padding:24px 20px 48px; flex-direction:column; align-items:flex-start; gap:10px}
}
@media (max-width:420px){
  .hero h1{font-size:34px}
  .featured-card h2{font-size:20px}
  .hero-meta{flex-direction:column; gap:6px; align-items:flex-start}
  .art-title{font-size:28px}
  .art-body blockquote{font-size:18px}
  .stat-num{font-size:34px}
}