/* Cognition Mesh concept site — editorial on dark, whiteboard layer. */
:root{
  --bg:#0e1116; --bg-2:#141920; --fg:#f2efe8; --fg-2:#b9b4a8; --rule:#2a2f38;
  --accent:#e9b44c; --accent-ink:#1a1305;
  --display:"Fraunces",Georgia,serif; --body:"Libre Franklin","Helvetica Neue",Arial,sans-serif;
  --hand:"Caveat","Segoe Print",cursive; --mono:"JetBrains Mono",ui-monospace,monospace;
  --ease:cubic-bezier(.16,1,.3,1); --max:1180px;
}
*{box-sizing:border-box}
html{color-scheme:dark;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);font-size:1.0625rem;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
.grain{position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.07;background:
  url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='.9'/></svg>")}
a{color:var(--fg);text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* masthead */
.masthead{position:relative;z-index:2;display:flex;justify-content:space-between;align-items:baseline;padding:1.4rem clamp(1rem,4vw,3rem);border-bottom:1px solid var(--rule);max-width:var(--max);width:100%;margin:0 auto}
.wordmark{font-family:var(--display);font-size:1.35rem;font-weight:500;letter-spacing:-.01em}
.wordmark em{font-style:italic;font-weight:300;color:var(--accent)}
.masthead-nav{display:flex;gap:1.6rem;font-size:.9rem;letter-spacing:.06em;text-transform:uppercase}
.masthead-nav a{color:var(--fg-2);border-bottom:1px solid transparent;padding-bottom:2px;transition:color .18s var(--ease),border-color .18s}
.masthead-nav a:hover{color:var(--fg);border-color:var(--accent)}

main{position:relative;z-index:1;flex:1;max-width:var(--max);width:100%;margin:0 auto;padding:clamp(2rem,6vw,5rem) clamp(1rem,4vw,3rem)}
.colophon{position:relative;z-index:1;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;max-width:var(--max);width:100%;margin:0 auto;padding:1.2rem clamp(1rem,4vw,3rem);border-top:1px solid var(--rule);font-family:var(--mono);font-size:.72rem;color:var(--fg-2)}

/* type */
.kicker{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 1rem}
.display{font-family:var(--display);font-weight:500;font-variation-settings:"opsz" 120;letter-spacing:-.02em;line-height:1.02;margin:0 0 1.2rem}
h1.display{font-size:clamp(2.4rem,6.2vw,5rem)}
h2.display{font-size:clamp(1.8rem,3.6vw,2.6rem);margin-top:3rem}
.thin{font-weight:300;font-style:italic;color:var(--fg-2)}
.lede{font-size:clamp(1.15rem,1.8vw,1.35rem);line-height:1.5;max-width:42ch;margin:0 0 1.2rem}
.muted{color:var(--fg-2)} .opt{color:var(--fg-2);font-weight:400}
.foot-rule{margin:3rem 0 0;padding-top:1rem;border-top:1px solid var(--rule);color:var(--fg-2);font-size:.95rem;max-width:60ch}
.foot-rule a{border-bottom:1px solid var(--rule)} .foot-rule a:hover{border-color:var(--accent)}
.link-arrow{border-bottom:1px solid var(--accent)}

/* doors */
.doors .display{max-width:16ch}
.door-grid{display:grid;grid-template-columns:5fr 7fr;gap:1.2rem;margin-top:2.5rem}
.door{position:relative;display:flex;flex-direction:column;gap:.7rem;padding:2rem 1.8rem 1.6rem;border:1px solid var(--rule);background:linear-gradient(180deg,var(--bg-2),transparent 70%);transition:transform .35s var(--ease),border-color .25s;min-height:300px}
.door:hover{transform:translateY(-4px);border-color:var(--accent)}
.door-journey{border-color:var(--accent);background:linear-gradient(160deg,rgba(233,180,76,.08),transparent 60%)}
.door-num{font-family:var(--mono);font-size:.74rem;color:var(--accent);letter-spacing:.14em}
.door-title{font-family:var(--display);font-size:clamp(1.6rem,3vw,2.3rem);font-weight:500;letter-spacing:-.02em;line-height:1.05}
.door-copy{color:var(--fg-2);max-width:40ch}
.door-cta{margin-top:auto;font-size:.9rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}

/* concern */
.concern-list{list-style:none;margin:2rem 0 0;padding:0;display:grid;gap:.6rem;max-width:760px}
.concern-list button{all:unset;display:flex;gap:1rem;align-items:baseline;width:100%;padding:1.1rem 1.2rem;border:1px solid var(--rule);cursor:pointer;font:inherit;font-size:1.1rem;line-height:1.35;transition:border-color .2s,background .2s,transform .3s var(--ease)}
.concern-list button:hover,.concern-list button:focus-visible{border-color:var(--accent);background:var(--bg-2);transform:translateX(6px)}
.concern-list button .n{font-family:var(--mono);font-size:.74rem;color:var(--accent);min-width:2ch}

/* beat */
.beat-head .display{max-width:18ch}
.beat-lens{color:var(--fg-2);text-transform:none;letter-spacing:0;font-family:var(--body);font-size:.85rem}
.beat-body{display:grid;grid-template-columns:7fr 5fr;gap:clamp(1.5rem,4vw,4rem);align-items:start;margin-top:1rem}
.beat-figure{margin:0;padding:1.2rem 1rem;border:1px solid var(--rule);background:var(--bg-2);min-height:280px}
.beat-figure svg{width:100%;height:auto;display:block}
.beat-figure text{font-family:var(--hand);font-size:22px;fill:var(--fg)}
.beat-figure .ink{fill:none;stroke:var(--fg);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;filter:url(#marker)}
.beat-figure .hi{stroke:var(--accent)} .beat-figure .hifill{fill:var(--accent);opacity:.18}
.beat-figure .draw{stroke-dasharray:1200;stroke-dashoffset:1200;animation:draw 1.4s var(--ease) forwards}
.beat-figure .draw.d2{animation-delay:.35s}.beat-figure .draw.d3{animation-delay:.7s}.beat-figure .draw.d4{animation-delay:1.05s}.beat-figure .draw.d5{animation-delay:1.4s}
@keyframes draw{to{stroke-dashoffset:0}}
.beat-you{padding:1rem 1.1rem;border-left:3px solid var(--accent);background:rgba(233,180,76,.06);margin:1.2rem 0}
.beat-line{color:var(--fg-2)}
.beat-nav{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-top:2.5rem;padding-top:1.2rem;border-top:1px solid var(--rule)}
.beat-dots{display:flex;gap:.45rem}
.beat-dots i{width:8px;height:8px;border-radius:50%;background:var(--rule);display:inline-block}
.beat-dots i.on{background:var(--accent)}
.btn{all:unset;cursor:pointer;font:inherit;font-weight:600;padding:.8rem 1.4rem;background:var(--accent);color:var(--accent-ink);letter-spacing:.02em;transition:transform .25s var(--ease),filter .2s}
.btn:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn-ghost{all:unset;cursor:pointer;font:inherit;color:var(--fg-2);padding:.8rem 0;border-bottom:1px solid transparent}
.btn-ghost:hover{color:var(--fg);border-color:var(--accent)}

/* end */
.end-grid{display:grid;grid-template-columns:7fr 5fr;gap:clamp(1.5rem,4vw,4rem);margin-top:2rem}
.end-path{list-style:none;padding:0;margin:0 0 1.5rem;border-top:1px solid var(--rule)}
.end-path li{padding:.7rem 0;border-bottom:1px solid var(--rule);display:flex;gap:1rem}
.end-path .n{font-family:var(--mono);font-size:.74rem;color:var(--accent);min-width:2ch;padding-top:.25rem}
.end-form{padding:1.6rem;border:1px solid var(--accent);background:linear-gradient(160deg,rgba(233,180,76,.07),transparent 60%);display:grid;gap:.9rem;align-content:start}
.form-title{font-family:var(--display);font-size:1.6rem;margin:0;letter-spacing:-.02em}
.form-copy{margin:0 0 .4rem;color:var(--fg-2)}
.end-form label{display:grid;gap:.3rem;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;color:var(--fg-2)}
.end-form input{font:inherit;font-size:1rem;text-transform:none;letter-spacing:0;padding:.7rem .8rem;background:var(--bg);color:var(--fg);border:1px solid var(--rule)}
.end-form input:focus{border-color:var(--accent)}
.form-note{margin:0;color:var(--accent);font-size:.95rem}

/* read */
.read{display:grid;grid-template-columns:220px 1fr;gap:clamp(1.5rem,4vw,4rem)}
.read-toc{position:sticky;top:1.5rem;align-self:start;display:flex;flex-direction:column;gap:.5rem;font-size:.95rem}
.read-toc a{color:var(--fg-2);padding:.25rem 0;border-left:2px solid transparent;padding-left:.6rem;transition:color .18s,border-color .18s}
.read-toc a:hover,.read-toc a.on{color:var(--fg);border-color:var(--accent)}
.read-body{max-width:68ch}
.read-body section{padding-bottom:2.5rem;border-bottom:1px solid var(--rule);margin-bottom:2.5rem;scroll-margin-top:1.5rem}
.read-body h3{font-family:var(--display);font-weight:500;font-size:1.25rem;margin:0 0 .5rem}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.two-col ul{padding-left:1.1rem;margin:0}
.two-col li{margin:.4rem 0}
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1rem 0}
.tier{padding:1.2rem;border:1px solid var(--rule);background:var(--bg-2)}
.tier p{margin:.3rem 0 0;color:var(--fg-2);font-size:.95rem}

/* motion */
.reveal{opacity:0;transform:translateY(14px);animation:reveal .8s var(--ease) forwards}
.reveal:nth-child(2){animation-delay:.08s}.reveal:nth-child(3){animation-delay:.16s}
.door-grid .reveal:nth-child(1){animation-delay:.28s}.door-grid .reveal:nth-child(2){animation-delay:.4s}
.doors .foot-rule{animation-delay:.6s}
@keyframes reveal{to{opacity:1;transform:none}}
.view-enter{animation:reveal .6s var(--ease)}
@media (prefers-reduced-motion:reduce){
  .reveal,.view-enter{animation:none;opacity:1;transform:none}
  .beat-figure .draw{animation:none;stroke-dashoffset:0}
  *{transition:none!important}
}

/* responsive */
@media (max-width:820px){
  .door-grid,.beat-body,.end-grid,.two-col,.tier-grid{grid-template-columns:1fr}
  .read{grid-template-columns:1fr}.read-toc{position:static;flex-direction:row;flex-wrap:wrap;gap:.6rem 1rem}
  .masthead{flex-direction:column;gap:.6rem;align-items:flex-start}
}