/* B-Side Labs — research lab homepage.
   Paper-default palette matching Virtue Council (warm cream/ink), inverted rules:
   paper-default, mono/sans-led, edge-to-edge, ruled. */
:root{
--paper:#24211a;--paper-2:#1b1811;
--ink:#f4efe4;--ink-2:#efe8d9;--ink-3:#e4dac4;
--on-ink:#24211a;--on-ink-soft:#6a6252;--on-ink-faint:#a49b86;
--rule:rgba(36,30,16,.18);--rule-soft:rgba(36,30,16,.10);
--accent:#b5482e;
--font-display:"Instrument Serif",Georgia,serif;
--font-body:"Hanken Grotesk",system-ui,sans-serif;
--font-mono:"JetBrains Mono",ui-monospace,monospace;
--maxw:1180px;--gutter:clamp(20px,5vw,56px)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--ink);color:var(--on-ink);font-family:var(--font-body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
::selection{background:rgba(181,72,46,.18)}
a{color:inherit;text-decoration:none}
a:hover{color:var(--paper)}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.kicker{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--on-ink-faint);display:flex;align-items:center;gap:10px}
.kicker::after{content:"";flex:1;height:1px;background:var(--rule-soft)}
.serif{font-family:var(--font-display);font-style:italic;font-weight:400}
.arrow{display:inline-block;transition:transform .18s}
a:hover .arrow{transform:translate(3px,-3px)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(244,239,228,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--rule-soft)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter);height:60px;display:flex;align-items:center;gap:24px}
.mark{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:15px;letter-spacing:-.01em;font-weight:500}
.mark .glyph{width:22px;height:16px;position:relative;flex:none}
.mark .glyph::before{content:"";position:absolute;left:0;right:0;top:50%;height:2px;background:var(--on-ink);border-radius:1px;transform:translateY(-50%)}
.mark .glyph::after{content:"";position:absolute;top:50%;left:50%;width:8px;height:8px;border-radius:50%;background:var(--accent);transform:translate(-50%,-50%)}
.by{font-size:13px;color:var(--on-ink-faint);border-left:1px solid var(--rule);padding-left:24px}
.by a{color:var(--on-ink-soft);border-bottom:1px solid var(--rule)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav-right a{font-size:14px;color:var(--on-ink-soft);padding:8px 13px;border-radius:8px;transition:background .18s,color .18s}
.nav-right a:hover{background:var(--ink-3);color:var(--paper)}
.nav-right .ghost{border:1px solid var(--rule);font-family:var(--font-mono);font-size:12px;letter-spacing:.03em;border-radius:999px}
.nav-right .ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}

/* hero */
.hero{position:relative;padding-block:clamp(56px,9vw,104px) clamp(40px,6vw,64px)}
#research{padding-block:0 clamp(32px,4vw,48px)}
.hero-scale{position:relative;height:clamp(70px,9vw,110px);margin:2px 0 12px}
.hero-scale .track{position:absolute;left:0;right:0;top:50%;height:7px;background:var(--on-ink);border-radius:3.5px;transform:translateY(-50%)}
.hero-scale .ball{position:absolute;top:50%;left:22%;width:clamp(56px,8vw,96px);height:clamp(56px,8vw,96px);border-radius:50%;background:var(--accent);transform:translate(-50%,-50%);will-change:left;animation:hero-osc 2.6s 1 forwards}
@keyframes hero-osc{
0%{left:22%;animation-timing-function:ease-in-out}
39%{left:95%;animation-timing-function:ease-in-out}
63%{left:65%;animation-timing-function:ease-in-out}
80%{left:80%;animation-timing-function:ease-in-out}
92%{left:72.5%;animation-timing-function:ease-out}
100%{left:75%}
}
@media(prefers-reduced-motion:reduce){.hero-scale .ball{animation:none;left:75%}}
.chip{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-mono);font-size:12px;color:var(--on-ink-soft);border:1px solid var(--rule);padding:5px 12px;border-radius:999px;margin-bottom:28px}
.chip b{font-weight:500;color:var(--paper)}
.hero h1{font-family:var(--font-body);font-weight:600;font-size:clamp(34px,5.4vw,66px);line-height:1.06;letter-spacing:-.03em;margin:0 0 22px;max-width:17ch;text-wrap:balance}
.hero h1 .serif{font-weight:400;letter-spacing:-.01em}
.hero p{font-size:clamp(17px,2vw,20px);color:var(--on-ink-soft);max-width:52ch;margin:0 0 34px;text-wrap:pretty}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cmd{display:flex;align-items:center;gap:14px;font-family:var(--font-mono);font-size:14px;background:var(--ink-2);border:1px solid var(--rule);border-radius:10px;padding:12px 14px;color:var(--paper)}
.cmd .p{color:var(--on-ink-faint)}
.cmd button{margin-left:4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--on-ink-soft);background:transparent;border:1px solid var(--rule);border-radius:6px;padding:5px 9px;cursor:pointer;transition:background .18s,color .18s}
.cmd button:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn{display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:500;padding:13px 20px;border-radius:10px;white-space:nowrap;border:1px solid transparent;transition:transform .16s,background .18s}
.btn-primary{background:var(--paper);color:var(--ink)}
.btn-primary:hover{color:var(--ink);transform:translateY(-2px)}
.btn-ghost{border-color:var(--rule);color:var(--on-ink)}
.btn-ghost:hover{background:var(--ink-3);transform:translateY(-2px)}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--rule-soft)}
.stats>div{padding:22px var(--gutter);border-left:1px solid var(--rule-soft)}
.stats>div:first-child{border-left:0}
.stats .n{font-family:var(--font-mono);font-size:clamp(20px,2.4vw,26px);letter-spacing:-.02em}
.stats .l{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--on-ink-faint);margin-top:6px}
.stats-outer{max-width:var(--maxw);margin:0 auto}

/* shot */
.shot-band{padding-block:clamp(40px,6vw,72px)}
.shot{border:1px solid var(--rule);border-radius:14px;overflow:hidden;background:var(--ink-2)}
.shot-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;border-bottom:1px solid var(--rule-soft)}
.shot-bar i{width:9px;height:9px;border-radius:50%;background:var(--rule);display:block}
.shot-bar span{margin-left:10px;font-family:var(--font-mono);font-size:11.5px;color:var(--on-ink-faint)}
.shot image-slot{display:block;width:100%;height:auto;aspect-ratio:16/9}
.shot iframe{display:block;width:100%;aspect-ratio:16/9;border:0}
.shot-cap{font-family:var(--font-mono);font-size:11.5px;color:var(--on-ink-faint);margin-top:12px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* features */
.section{padding-block:clamp(32px,4vw,48px)}
.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,4vw,52px);margin-top:44px}
.feat .n{font-family:var(--font-mono);font-size:12px;color:var(--on-ink-faint);margin-bottom:14px}
.feat h3{font-family:var(--font-body);font-weight:600;font-size:19px;letter-spacing:-.01em;margin:0 0 10px}
.feat p{margin:0;color:var(--on-ink-soft);font-size:15.5px;text-wrap:pretty}

/* code */
.code-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(28px,5vw,64px);align-items:center;margin-top:40px}
.code-copy h2{font-family:var(--font-body);font-weight:600;font-size:clamp(24px,3vw,34px);letter-spacing:-.02em;line-height:1.15;margin:0 0 16px}
.code-copy p{color:var(--on-ink-soft);margin:0 0 18px;text-wrap:pretty}
.code-copy ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.code-copy li{display:flex;gap:11px;font-size:15px;color:var(--on-ink-soft)}
.code-copy li::before{content:"—";color:var(--on-ink-faint)}
pre{margin:0;background:var(--ink-2);border:1px solid var(--rule);border-radius:12px;padding:22px 24px;overflow-x:auto;font-family:var(--font-mono);font-size:13.5px;line-height:1.85;color:var(--on-ink)}
pre .c{color:var(--on-ink-faint)}
pre .k{color:var(--accent)}
pre .s{color:var(--on-ink-soft)}

/* cta — inverted to ink, the one dark band on an otherwise paper page */
.cta{background:var(--paper);color:var(--ink);padding-block:clamp(64px,9vw,110px)}
.cta .kicker{color:rgba(244,239,228,.55)}
.cta .kicker::after{background:rgba(244,239,228,.16)}
.cta h2{font-family:var(--font-display);font-weight:400;font-size:clamp(30px,4.4vw,54px);line-height:1.1;letter-spacing:-.01em;margin:28px 0 22px;max-width:20ch}
.cta .row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta .btn-primary{background:var(--ink);color:var(--paper)}
.cta .btn-primary:hover{color:var(--paper)}
.cta .btn-ghost{border-color:rgba(244,239,228,.22);color:var(--ink)}
.cta .btn-ghost:hover{background:var(--paper-2)}
.cta .cmd{background:var(--paper-2);border-color:rgba(244,239,228,.18);color:var(--ink)}
.cta .cmd .p{color:rgba(244,239,228,.5)}
.cta .cmd button{color:rgba(244,239,228,.65);border-color:rgba(244,239,228,.22)}
.cta .cmd button:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* footer — the bridge back to the personal site */
.foot{padding-block:34px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;font-family:var(--font-mono);font-size:12px;color:var(--on-ink-faint);letter-spacing:.02em}
.foot a{color:var(--on-ink-soft);border-bottom:1px solid var(--rule)}
.foot a:hover{color:var(--paper);border-color:var(--paper)}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}

@media(max-width:900px){
.feats{grid-template-columns:1fr;gap:30px}
.code-grid{grid-template-columns:1fr}
.stats{grid-template-columns:1fr 1fr}
.stats>div:nth-child(3){border-left:0}
.stats>div:nth-child(n+3){border-top:1px solid var(--rule-soft)}
.by{display:none}
}
@media(max-width:620px){
body{font-size:16px}
.nav-right a:not(.ghost){display:none}
.cmd{width:100%;justify-content:space-between}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}

/* ===== lab-specific ===== */
.lede{font-size:clamp(16px,1.6vw,18px);color:var(--on-ink-soft);max-width:70ch;margin:20px 0 0;text-wrap:pretty}
.keywords{display:flex;flex-wrap:wrap;gap:9px;margin:24px 0 0}
.keywords span{font-family:var(--font-mono);font-size:12px;color:var(--on-ink-soft);border:1px solid var(--rule);padding:5px 12px;border-radius:999px}
.worldview{background:var(--ink-2);padding-block:clamp(40px,6vw,64px)}
.reveal{display:inline-block;opacity:0;transform:translateY(18px);transition:opacity 1.1s ease,transform 1.1s ease}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.worldview .reveal:nth-of-type(1){transition-delay:0s}
.worldview .reveal:nth-of-type(2){transition-delay:.25s}
.worldview .reveal:nth-of-type(3){transition-delay:.5s}
.worldview .reveal:nth-of-type(4){transition-delay:.75s}
@media(prefers-reduced-motion:reduce){.reveal{transition:none}}
.worldview h3{font-family:var(--font-display);font-weight:400;font-size:clamp(23px,2.6vw,30px);letter-spacing:-.01em;line-height:1.1;margin:0 0 12px}

.tools{display:grid;gap:2px;margin-top:40px}
.tool{display:grid;grid-template-columns:44px 1.1fr 1.4fr auto;gap:clamp(16px,3vw,36px);align-items:baseline;padding:20px 16px;border-radius:12px;transition:background .2s,padding-left .22s}
.tool:hover{background:var(--ink-2);padding-left:24px}
.tool .i{font-family:var(--font-mono);font-size:12px;color:var(--on-ink-faint)}
.tool .nm{font-family:var(--font-body);font-weight:600;font-size:19px;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
.tool .nm .arrow{color:var(--on-ink-faint);font-size:14px}
.tool:hover .nm .arrow{color:var(--paper)}
.tool .d{color:var(--on-ink-soft);font-size:15px;text-wrap:pretty}
.tool .t{font-family:var(--font-mono);font-size:11px;letter-spacing:.03em;color:var(--on-ink-faint);border:1px solid var(--rule);padding:4px 10px;border-radius:999px;white-space:nowrap}

.posts{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:40px}
.post{display:block;border:1px solid var(--rule);border-radius:14px;overflow:hidden;background:var(--ink-2);transition:transform .18s,border-color .18s}
.post:hover{transform:translateY(-3px);border-color:var(--on-ink-faint)}
.post img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:var(--ink)}
.post-body{padding:20px 22px 26px}
.post-date{display:block;font-family:var(--font-mono);font-size:12px;color:var(--on-ink-faint);margin-bottom:10px}
.post h3{font-family:var(--font-body);font-weight:600;font-size:19px;letter-spacing:-.01em;line-height:1.3;margin:0 0 10px;color:var(--on-ink)}
.post p{margin:0;color:var(--on-ink-soft);font-size:15px;line-height:1.5;text-wrap:pretty}
.papers-foot{margin-top:26px}
.papers-foot a{font-family:var(--font-mono);font-size:13px;color:var(--on-ink-soft);border-bottom:1px solid var(--rule)}
.papers-foot a:hover{color:var(--paper);border-color:var(--paper)}

.people{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,2.6vw,30px);margin-top:44px}
.person image-slot{display:block;width:100%;height:auto;aspect-ratio:4/5;border-radius:12px;overflow:hidden}
.person .nm{font-size:16px;font-weight:600;letter-spacing:-.01em;margin-top:14px}
.person .ro{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.03em;color:var(--on-ink-faint);margin-top:5px}

.join{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:start;margin-top:28px}
.join-list{display:grid;gap:2px}
.join-list a{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:15px 0;border-top:1px solid rgba(244,239,228,.18);font-size:16px;transition:padding-left .2s}
.join-list a:last-child{border-bottom:1px solid rgba(244,239,228,.18)}
.join-list a:hover{color:var(--ink);padding-left:10px}
.join-list .sub{font-family:var(--font-mono);font-size:12px;color:rgba(244,239,228,.55)}

@media(max-width:900px){
.tool{grid-template-columns:1fr;gap:8px}
.tool .i{display:none}
.people{grid-template-columns:1fr 1fr}
.join{grid-template-columns:1fr}
}