/* ===================================================================
   STANDARD. — shared case-study stylesheet
   Powers Sequoia / Strivers / Handzin / Stead / Sommsation case studies.
   Chrome = Standard. brand (Bone default + palette switcher, matches homepage).
   Each project's own aesthetic lives inside its imagery, never the chrome.
   Image backdrops default to a light surface (real UI screenshots / photos);
   add class "dark" to a media element for dark renders on obsidian.
   =================================================================== */
:root{
  --cream:#F6F4EF;--cream-deep:#ECE8DF;--ink:#191712;--coral:#A8452F;--coral-soft:#D9B29F;
  --muted:#726C61;--rule:rgba(25,23,18,0.14);--rule-soft:rgba(25,23,18,0.07);
  --band-bg:#191712;--band-fg:#F1EDE4;--band-accent:var(--coral);--band-accent-soft:var(--coral-soft);
  --band-line:rgba(241,237,228,0.14);--band-line-soft:rgba(241,237,228,0.11);--band-muted:rgba(241,237,228,0.6);
  --obsidian:#0A0908;
  --radius:14px;--radius-pill:999px;
  --serif:'Instrument Serif', Georgia, serif;
  --mono:'IBM Plex Mono', Menlo, monospace;
  --railw:clamp(300px, 30vw, 400px);
  --gpad:clamp(20px, 4vw, 60px);
}
html[data-theme="bone"]{--cream:#F6F4EF;--cream-deep:#ECE8DF;--ink:#191712;--coral:#A8452F;--coral-soft:#D9B29F;--muted:#726C61;--rule:rgba(25,23,18,0.14);--rule-soft:rgba(25,23,18,0.07);--band-bg:#191712;--band-fg:#F1EDE4;--band-line:rgba(241,237,228,0.14);--band-line-soft:rgba(241,237,228,0.11);--band-muted:rgba(241,237,228,0.6);}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;background:var(--cream);color:var(--ink);font-family:var(--mono);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;}
a{color:inherit;}
img{display:block;max-width:100%;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.label{font-family:var(--mono);font-size:11px;letter-spacing:0.16em;text-transform:uppercase;}
.coral{color:var(--coral);}

/* SHELL */
.shell{display:grid;grid-template-columns:1fr;}
@media (min-width:900px){ .shell{grid-template-columns:var(--railw) 1fr;} }

/* META RAIL */
.rail{background:var(--cream);border-bottom:1px solid var(--rule);}
@media (min-width:900px){
  .rail{position:sticky;top:0;align-self:start;height:100vh;border-bottom:0;border-right:1px solid var(--rule);
    display:flex;flex-direction:column;justify-content:space-between;padding:clamp(28px,3vw,44px) clamp(24px,2.4vw,40px);}
}
.rail__top{display:flex;flex-direction:column;gap:clamp(18px,2.2vw,30px);}
.brand{display:inline-flex;align-items:baseline;gap:10px;text-decoration:none;color:var(--ink);}
.brand__mark{font-family:var(--serif);font-size:26px;line-height:0.9;letter-spacing:-0.015em;}
.brand__mark .dot{color:var(--coral);}
.brand__sub{font-family:var(--mono);font-size:9px;letter-spacing:0.16em;text-transform:uppercase;color:var(--muted);}
.backlink{font-family:var(--mono);font-size:11px;letter-spacing:0.14em;text-transform:uppercase;text-decoration:none;color:var(--muted);display:inline-flex;align-items:center;gap:8px;transition:gap 220ms ease,color 220ms ease;}
.backlink:hover{color:var(--coral);gap:12px;}
.rail__crumb{font-family:var(--mono);font-size:10.5px;letter-spacing:0.14em;text-transform:uppercase;color:var(--muted);}
.rail__crumb a{text-decoration:none;color:var(--muted);}
.rail__crumb a:hover{color:var(--coral);}
.rail__title{font-family:var(--serif);font-weight:400;font-size:clamp(40px,4.4vw,60px);line-height:0.92;letter-spacing:-0.02em;margin:0;}
.rail__title em{font-style:italic;color:var(--coral);}
.rail__tag{font-family:var(--serif);font-style:italic;font-size:clamp(17px,1.5vw,20px);line-height:1.3;color:var(--ink);margin:0;max-width:34ch;}
.rail__meta{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px;border-top:1px solid var(--rule);padding-top:20px;}
.meta__k{font-family:var(--mono);font-size:9.5px;letter-spacing:0.14em;text-transform:uppercase;color:var(--muted);margin-bottom:5px;}
.meta__v{font-family:var(--mono);font-size:12px;line-height:1.4;color:var(--ink);}
.rail__cta{display:flex;flex-direction:column;gap:14px;}
.rail__status{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11px;letter-spacing:0.12em;text-transform:uppercase;color:var(--ink);}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--coral);animation:pulse 2.4s infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(168,69,47,0.5);}70%{box-shadow:0 0 0 8px rgba(168,69,47,0);}100%{box-shadow:0 0 0 0 rgba(168,69,47,0);}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--mono);font-size:11px;letter-spacing:0.14em;text-transform:uppercase;text-decoration:none;color:var(--cream);background:var(--coral);border-radius:var(--radius-pill);padding:13px 22px;transition:transform 220ms ease,box-shadow 220ms ease,filter 220ms ease;white-space:nowrap;}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 26px -14px var(--coral);filter:brightness(0.96);}
.rail__bar{display:flex;align-items:center;justify-content:space-between;padding:16px var(--gpad);}
@media (min-width:900px){ .rail__bar{display:none;} }
@media (max-width:899px){
  .rail__top{padding:0 var(--gpad) 8px;}
  .rail__cta{padding:20px var(--gpad) 28px;}
  .rail__title{font-size:clamp(48px,13vw,76px);}
}

/* FEED */
.feed{min-width:0;}
.hero-media{position:relative;width:100%;aspect-ratio:16/10;max-height:78vh;background:var(--cream-deep);overflow:hidden;border-bottom:1px solid var(--rule);}
.hero-media.dark{background:var(--obsidian);}
.hero-media img.bg{width:100%;height:100%;object-fit:cover;}
.hero-media .logo{position:absolute;inset:0;margin:auto;width:min(360px,52%);height:auto;filter:drop-shadow(0 8px 30px rgba(0,0,0,0.4));}

.block{padding:clamp(52px,7vw,110px) var(--gpad);border-bottom:1px solid var(--rule);}
.block--deep{background:var(--cream-deep);}
.block--band{background:var(--band-bg);color:var(--band-fg);}
.block__inner{max-width:760px;}
.block--wide .block__inner{max-width:none;}
.eyebrow{display:inline-flex;align-items:center;gap:14px;color:var(--coral);margin-bottom:clamp(20px,2.4vw,32px);}
.eyebrow::before{content:"";width:36px;height:1px;background:var(--coral);}
.band .eyebrow{color:var(--band-accent);}
.band .eyebrow::before{background:var(--band-accent);}
.h-sec{font-family:var(--serif);font-weight:400;font-size:clamp(34px,5vw,68px);line-height:0.98;letter-spacing:-0.02em;margin:0;}
.h-sec em{font-style:italic;color:var(--coral);}
.band .h-sec{color:var(--band-fg);}
.band .h-sec em{color:var(--band-accent);}
.body{font-size:14.5px;line-height:1.85;color:var(--muted);max-width:64ch;margin:clamp(22px,2.6vw,34px) 0 0;}
.body + .body{margin-top:16px;}
.band .body{color:var(--band-muted);}

/* stats */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 40px;margin-top:clamp(34px,4vw,54px);padding-top:30px;border-top:1px solid var(--rule);}
@media (min-width:620px){ .stats{grid-template-columns:repeat(4,1fr);} }
.band .stats{border-top-color:var(--band-line);}
.stat__k{font-family:var(--serif);font-size:clamp(40px,5vw,62px);line-height:0.85;letter-spacing:-0.02em;color:var(--coral);}
.stat__l{font-family:var(--mono);font-size:11px;line-height:1.5;color:var(--muted);margin-top:10px;letter-spacing:0.02em;}
.band .stat__l{color:var(--band-muted);}

/* media */
.media{margin-top:clamp(34px,4vw,56px);}
.media img{width:100%;height:auto;border-radius:var(--radius);display:block;}
.media--frame{background:var(--cream-deep);border-radius:var(--radius);padding:clamp(16px,2.4vw,40px);border:1px solid var(--rule);}
.media--frame.dark{background:var(--obsidian);border-color:transparent;}
.caption{font-family:var(--mono);font-size:11px;letter-spacing:0.03em;color:var(--muted);margin-top:16px;}
.band .caption{color:var(--band-muted);}

/* image grids */
.grid-2,.grid-3,.grid-4{display:grid;grid-template-columns:1fr;gap:clamp(14px,1.6vw,24px);margin-top:clamp(34px,4vw,56px);}
@media (min-width:680px){ .grid-2{grid-template-columns:repeat(2,1fr);} .grid-3{grid-template-columns:repeat(3,1fr);} .grid-4{grid-template-columns:repeat(2,1fr);} }
@media (min-width:960px){ .grid-4{grid-template-columns:repeat(4,1fr);} }
.cell{background:var(--cream-deep);border-radius:var(--radius);overflow:hidden;border:1px solid var(--rule);}
.cell.dark{background:var(--obsidian);border-color:transparent;}
.cell img{width:100%;height:100%;object-fit:cover;}
.grid-3 .cell img,.grid-4 .cell img{aspect-ratio:3/4;}
.grid-2 .cell img{aspect-ratio:4/3;}

/* split */
.split{display:grid;grid-template-columns:1fr;gap:clamp(30px,4vw,64px);align-items:center;}
@media (min-width:860px){ .split{grid-template-columns:1fr 1fr;} .split.rev .split__media{order:-1;} }
.split__media{background:var(--cream-deep);border-radius:var(--radius);overflow:hidden;border:1px solid var(--rule);}
.split__media.dark{background:var(--obsidian);border-color:transparent;}
.split__media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}

/* features */
.features{display:grid;grid-template-columns:1fr;gap:0;margin-top:clamp(34px,4vw,54px);}
@media (min-width:680px){ .features{grid-template-columns:1fr 1fr;gap:0 clamp(32px,4vw,64px);} }
.feature{padding:22px 0;border-top:1px solid var(--rule);}
.band .feature{border-top-color:var(--band-line-soft);}
.feature__t{font-family:var(--serif);font-size:clamp(20px,2.2vw,26px);line-height:1.1;margin:0 0 8px;}
.band .feature__t{color:var(--band-fg);}
.feature__d{font-size:12.5px;line-height:1.7;color:var(--muted);}
.band .feature__d{color:var(--band-muted);}

/* slot — captioned image drop zone (placeholder to fill later) */
.slot{background:var(--cream-deep);border:1px dashed var(--rule);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:10px;padding:clamp(28px,4vw,48px);min-height:220px;color:var(--muted);}
.slot--tall{min-height:320px;aspect-ratio:3/4;}
.slot--wide{min-height:300px;aspect-ratio:16/9;}
.slot--hero{position:absolute;inset:0;border:0;border-radius:0;background:transparent;}
.hero-media.dark .slot,.band .slot{background:rgba(255,255,255,0.03);border-color:var(--band-line);color:var(--band-muted);}
.slot__tag{font-family:var(--mono);font-size:9.5px;letter-spacing:0.16em;text-transform:uppercase;color:var(--coral);border:1px solid var(--coral);border-radius:var(--radius-pill);padding:5px 12px;}
.slot__d{font-family:var(--serif);font-size:clamp(18px,2vw,24px);line-height:1.2;color:var(--ink);max-width:26ch;}
.hero-media.dark .slot__d,.band .slot__d{color:var(--band-fg);}
.slot__id{font-family:var(--mono);font-size:10px;letter-spacing:0.06em;color:var(--muted);}

/* palette token grid */
.tokens{display:grid;grid-template-columns:repeat(2,1fr);gap:18px 24px;margin-top:clamp(30px,3.5vw,48px);}
@media (min-width:680px){ .tokens{grid-template-columns:repeat(4,1fr);} }
.token{display:flex;align-items:center;gap:13px;}
.token .sw{flex:0 0 auto;width:42px;height:42px;border-radius:10px;border:1px solid var(--rule);}
.token__n{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:0.06em;text-transform:uppercase;}
.token__h{font-family:var(--mono);font-size:11px;color:var(--muted);}

/* atmosphere cards (Stead) */
.atmos{display:grid;grid-template-columns:1fr;gap:clamp(14px,1.6vw,24px);margin-top:clamp(30px,3.5vw,48px);}
@media (min-width:620px){ .atmos{grid-template-columns:repeat(2,1fr);} }
@media (min-width:960px){ .atmos{grid-template-columns:repeat(4,1fr);} }
.atmos__card{border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden;background:var(--cream);}
.atmos__sw{height:130px;}
.atmos__b{padding:16px 18px 20px;}
.atmos__n{font-family:var(--mono);font-size:10.5px;letter-spacing:0.14em;color:var(--coral);}
.atmos__t{font-family:var(--serif);font-size:23px;line-height:1.1;margin:6px 0 8px;color:var(--ink);}
.atmos__t em{font-style:italic;color:var(--muted);font-size:16px;}
.atmos__d{font-family:var(--mono);font-size:11px;line-height:1.6;color:var(--muted);}

/* code block */
.code{margin-top:clamp(30px,3.5vw,48px);background:#0E0E0E;border-radius:var(--radius);padding:26px 28px;overflow-x:auto;}
.code pre{font-family:var(--mono);font-size:12.5px;line-height:1.75;color:rgba(255,255,255,0.78);white-space:pre;margin:0;}
.code .com{color:#7A7A7A;}
.code .sel{color:var(--coral);}
.code .prop{color:rgba(255,255,255,0.5);}

/* pull quote */
.pull{font-family:var(--serif);font-style:italic;font-size:clamp(28px,4vw,52px);line-height:1.12;letter-spacing:-0.01em;margin:0;max-width:20ch;}
.pull__attr{display:block;font-family:var(--mono);font-style:normal;font-size:11px;letter-spacing:0.14em;text-transform:uppercase;color:var(--coral);margin-top:24px;}

/* partner logos */
.logos{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(30px,3.5vw,48px);}
.logos span{font-family:var(--mono);font-size:12px;letter-spacing:0.06em;color:var(--muted);border:1px solid var(--rule);border-radius:var(--radius-pill);padding:10px 18px;}

/* live embed + pills */
.embed{margin-top:clamp(34px,4vw,56px);}
.embed__frame{border:1px solid var(--rule);border-radius:var(--radius);overflow:hidden;background:var(--obsidian);box-shadow:0 40px 90px -50px rgba(0,0,0,0.5);}
.embed__bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#0E0E0E;border-bottom:1px solid rgba(255,255,255,0.08);}
.led{width:9px;height:9px;border-radius:50%;background:#3A3A3A;}
.led-url{margin-left:12px;font-family:var(--mono);font-size:11px;color:#7A7A7A;letter-spacing:0.04em;}
.embed__iframe{display:block;width:100%;height:660px;border:0;background:var(--obsidian);}
.embed__poster{display:none;}
.embed__poster img{width:100%;display:block;}
.pill-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:clamp(28px,3vw,44px);}
.pill{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;letter-spacing:0.1em;text-transform:uppercase;text-decoration:none;color:var(--ink);border:1px solid var(--rule);padding:14px 26px;border-radius:var(--radius-pill);transition:border-color 200ms ease,color 200ms ease,gap 200ms ease;}
.pill:hover{border-color:var(--coral);color:var(--coral);gap:12px;}
.band .pill{color:var(--band-fg);border-color:var(--band-line);}
.pill--filled{background:var(--coral);color:var(--cream);border-color:var(--coral);}
.pill--filled:hover{color:var(--cream);filter:brightness(0.96);}
@media (max-width:859px){ .embed__iframe{display:none;} .embed__poster{display:block;} }

/* CTA */
.cta{padding:clamp(64px,9vw,140px) var(--gpad) clamp(40px,5vw,70px);border-bottom:1px solid var(--rule);}
.cta__title{font-family:var(--serif);font-weight:400;font-size:clamp(48px,9vw,130px);line-height:0.9;letter-spacing:-0.02em;margin:0;}
.cta__title em{font-style:italic;color:var(--coral);}
.cta__row{display:flex;flex-wrap:wrap;align-items:center;gap:18px clamp(20px,3vw,40px);margin-top:clamp(28px,3.5vw,48px);}
.cta__email{font-family:var(--mono);font-size:clamp(15px,1.8vw,20px);text-decoration:none;border-bottom:2px solid var(--coral);padding-bottom:4px;transition:color 200ms ease;word-break:break-word;}
.cta__email:hover{color:var(--coral);}
.cta__meta{color:var(--muted);line-height:1.7;}
.cta__nav{margin-top:clamp(34px,4vw,56px);display:flex;gap:28px;flex-wrap:wrap;}
.cta__nav a{font-family:var(--mono);font-size:11px;letter-spacing:0.12em;text-transform:uppercase;text-decoration:none;color:var(--muted);transition:color 200ms ease;}
.cta__nav a:hover{color:var(--coral);}

/* footer wordmark */
.foot{padding:clamp(30px,4vw,56px) var(--gpad) 22px;}
.foot__markwrap{width:100%;overflow:hidden;}
.foot__mark{font-family:var(--serif);font-weight:400;text-transform:uppercase;line-height:0.76;letter-spacing:-0.03em;color:var(--ink);margin:0;white-space:nowrap;display:inline-block;transform-origin:left top;font-size:100px;}
.foot__mark .dot{color:var(--coral);}
.foot__bar{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px 20px;border-top:1px solid var(--rule);margin-top:20px;padding-top:20px;color:var(--muted);}
.foot__bar a{text-decoration:none;color:var(--muted);}
.foot__bar a:hover{color:var(--coral);}

/* reveal */
.js .reveal{transition:opacity 800ms ease,transform 800ms cubic-bezier(.2,.7,.2,1);}
.js .reveal.pre-reveal{opacity:0;transform:translateY(24px);}
@media (prefers-reduced-motion:reduce){ .js .reveal,.js .reveal.pre-reveal{opacity:1;transform:none;transition:none;} .dot-live{animation:none;} }

/* mobile drawer */
.navToggle{display:flex;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.navToggle span{width:24px;height:2px;background:var(--ink);transition:transform 260ms ease,opacity 200ms ease;}
.navToggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.navToggle.is-open span:nth-child(2){opacity:0;}
.navToggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer{position:fixed;inset:0 0 0 auto;width:min(84vw,360px);background:var(--cream);z-index:120;transform:translateX(100%);transition:transform 340ms cubic-bezier(.2,.7,.2,1);box-shadow:-24px 0 60px -30px rgba(0,0,0,0.45);display:flex;flex-direction:column;justify-content:center;gap:8px;padding:0 34px;}
.drawer.is-open{transform:none;}
.drawer a{font-family:var(--mono);font-size:14px;letter-spacing:0.12em;text-transform:uppercase;text-decoration:none;color:var(--ink);padding:12px 0;border-bottom:1px solid var(--rule-soft);}
.drawer .btn{margin-top:16px;}
.scrim{position:fixed;inset:0;background:rgba(25,23,18,0.35);opacity:0;visibility:hidden;transition:opacity 300ms ease;z-index:110;}
.scrim.is-open{opacity:1;visibility:visible;}
@media (min-width:900px){ .navToggle,.drawer,.scrim{display:none;} }