/* Blog ("Field notes"). Same tokens as the rest of the site: page #02040A, Inter 400 only, darker borderless cards. */
.blog-body{background:var(--page)}
.blog{padding:clamp(140px,16vw,200px) var(--gutter) 0}
.blog-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap}
.blog-head__t{font-size:clamp(40px,5.6vw,84px);line-height:.98;letter-spacing:-.04em;color:var(--text-strong)}
.blog-head__p{margin-top:20px;max-width:52ch;font-size:clamp(16px,1.25vw,19px);line-height:1.5;color:var(--text-secondary)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{all:unset;box-sizing:border-box;cursor:pointer;height:32px;padding:0 14px;display:inline-flex;align-items:center;border-radius:999px;font-size:14px;line-height:18px;color:var(--text-secondary);background:rgba(255,255,255,.04);transition:background-color .15s ease,color .15s ease}
.chip:hover{color:var(--text-strong);background:rgba(255,255,255,.08)}
.chip[aria-pressed="true"]{background:var(--action-primary);color:var(--page)}
.chip:focus-visible{outline:2px solid var(--acc);outline-offset:2px}

/* shared card */
.post{position:relative;display:flex;flex-direction:column;border-radius:10px;background:var(--surface-popover);overflow:hidden;isolation:isolate;outline:none;-webkit-tap-highlight-color:transparent;transition:background-color .3s ease}
.post::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;border-radius:inherit;background:url("./assets/textures/dither.png") 0 0/576px 576px;opacity:.032}
a.post:hover,a.post:focus-visible{background:#121219}
a.post:focus-visible{box-shadow:0 0 0 2px var(--acc)}
.post[hidden]{display:none}
.post__cover{position:relative;display:block;aspect-ratio:16/10;overflow:hidden}
.post__cover svg{display:block;width:100%;height:100%}
.post__body{display:flex;flex-direction:column;flex:1;padding:22px 24px 20px}
.post__k{display:flex;gap:8px;flex-wrap:wrap;font-size:13px;line-height:18px;color:var(--text-muted)}
.post__k span+span::before{content:"\00b7";margin-right:8px;color:rgba(255,255,255,.3)}
.post__t{margin-top:14px;font-size:clamp(19px,1.5vw,22px);line-height:1.25;letter-spacing:-.015em;color:var(--text-strong);text-wrap:balance}
.post__p{margin-top:10px;font-size:15px;line-height:1.55;color:var(--text-secondary)}
.post__meta{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:28px;font-size:14px;line-height:18px}
.post__type{font:11px/15px var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);opacity:0;transform:translateY(-6px);transition:opacity .45s var(--ease-out),transform .45s var(--ease-out)}
.post__open{color:var(--text-strong);opacity:0;transform:translateY(-6px);transition:opacity .45s var(--ease-out) .05s,transform .45s var(--ease-out) .05s}
a.post:hover .post__type,a.post:hover .post__open,a.post:focus-visible .post__type,a.post:focus-visible .post__open{opacity:1;transform:none}
@media (hover:none){.post__type,.post__open{opacity:1;transform:none}}
/* placeholder: no link, dimmer, says so */
.post--soon{background:rgba(14,14,19,.55)}
.post--soon .post__t{color:var(--text-muted)}
.post--soon .post__p{color:rgba(255,255,255,.4)}
.post--soon .post__type,.post--soon .post__open{opacity:1;transform:none;color:rgba(255,255,255,.3)}
.post--soon .post__cover{opacity:.55}

/* featured */
.feat{margin-top:clamp(40px,5vw,64px);display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr)}
.feat .post__cover{aspect-ratio:auto;min-height:clamp(340px,34vw,520px)}
.feat .post__body{padding:clamp(28px,3vw,44px);justify-content:flex-start}
.feat .post__t{margin-top:20px;font-size:clamp(28px,2.8vw,44px);line-height:1.06;letter-spacing:-.03em}
.feat .post__p{margin-top:16px;font-size:clamp(15px,1.15vw,17px)}

/* grid 3/2/1 */
.posts{margin-top:16px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.blog-empty{margin-top:32px;font-size:15px;color:var(--text-muted)}

/* cover sketches: dotted field + white line art (same pattern recipe as the white paper covers) */
.sk{background:#06070d}
.sk pattern circle{fill:rgba(255,255,255,.2)}
.sk .ln{fill:none;stroke:rgba(255,255,255,.85);stroke-width:1;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.sk .ln--2{stroke-opacity:.45}
.sk .ln--3{stroke-opacity:.22}
.sk .ln--dash{stroke-dasharray:3 4}
.sk .bx{fill:rgba(2,4,10,.85);stroke:rgba(255,255,255,.5);stroke-width:1;vector-effect:non-scaling-stroke}
.sk .fl{fill:rgba(255,255,255,.08)}
.sk .pt{fill:#fff}
.sk .lb{font:9px var(--font-mono);letter-spacing:.12em;fill:rgba(255,255,255,.4)}
.sk .bar{fill:rgba(255,255,255,.22);transform-box:fill-box;transform-origin:50% 100%;transition:transform .8s var(--ease-out),fill .4s ease}
.sk .bar--hi{fill:rgba(255,255,255,.55)}
.sk .mv{transition:transform 1s var(--ease-out),opacity .6s ease}
.sk .draw{vector-effect:none;stroke-width:1.4;stroke-dasharray:1;stroke-dashoffset:0;transition:stroke-dashoffset 1.1s var(--ease-out)}
.sk .spin{transform-box:fill-box;transform-origin:center;transition:transform 1.4s var(--ease-out)}
.sk .ring{fill:none;stroke:rgba(255,255,255,.6);stroke-width:1;vector-effect:non-scaling-stroke;transform-box:fill-box;transform-origin:center;opacity:0}
/* hover: each sketch does one small thing */
a.post:hover .sk .mv--l,a.post:focus-visible .sk .mv--l{transform:translateX(-14px)}
a.post:hover .sk .mv--r,a.post:focus-visible .sk .mv--r{transform:translateX(14px)}
a.post:hover .sk .mv--u,a.post:focus-visible .sk .mv--u{transform:translateY(-10px)}
a.post:hover .sk .spin,a.post:focus-visible .sk .spin{transform:rotate(90deg)}
a.post:hover .sk .draw,a.post:focus-visible .sk .draw{animation:skdraw 1.2s var(--ease-out)}
a.post:hover .sk .ring,a.post:focus-visible .sk .ring{animation:skring 1.4s var(--ease-out) infinite}
a.post:hover .sk .bar,a.post:focus-visible .sk .bar{transform:scaleY(var(--s,1.4))}
a.post:hover .sk .trv,a.post:focus-visible .sk .trv{offset-distance:100%}
.sk .trv{offset-distance:0%;transition:offset-distance 1.6s var(--ease-out)}
@keyframes skdraw{0%{stroke-dashoffset:1}100%{stroke-dashoffset:0}}
@keyframes skring{0%{opacity:.8;transform:scale(1)}100%{opacity:0;transform:scale(2.6)}}

/* ARTICLE */
.art{padding:clamp(140px,16vw,200px) var(--gutter) 0}
.art-head{max-width:880px;margin:0 auto;text-align:center}
.art-head .post__k{justify-content:center}
.art-head__t{margin-top:20px;font-size:clamp(36px,4.8vw,68px);line-height:1.02;letter-spacing:-.035em;color:var(--text-strong);text-wrap:balance}
.art-head__p{margin:20px auto 0;max-width:56ch;font-size:clamp(16px,1.25vw,19px);line-height:1.5;color:var(--text-secondary)}
.art-head__by{margin-top:18px;font-size:13px;line-height:18px;color:var(--text-muted)}
.art-hero{margin-top:clamp(40px,5vw,64px);border-radius:10px;overflow:hidden;aspect-ratio:21/8;min-height:220px}
.art-hero svg{display:block;width:100%;height:100%}
.art-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,680px) minmax(0,1fr);gap:48px;margin-top:clamp(56px,6vw,88px)}
.toc{position:sticky;top:96px;align-self:start;justify-self:start;font-size:13px;line-height:18px;max-width:220px}
.toc__h{font:11px/15px var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.4);margin-bottom:12px}
.toc ol{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px;border-left:1px solid rgba(255,255,255,.08)}
.toc a{display:block;padding:5px 0 5px 14px;margin-left:-1px;border-left:1px solid transparent;color:var(--text-muted);transition:color .15s ease,border-color .15s ease}
.toc a:hover{color:var(--text-strong)}
.toc a.is-on{color:var(--text-strong);border-left-color:#fff}
.prose{color:var(--text-secondary);font-size:17px;line-height:1.72}
.prose>*+*{margin-top:20px}
.prose h2{margin-top:56px;font-size:24px;line-height:1.25;letter-spacing:-.015em;color:var(--text-strong);scroll-margin-top:96px}
.prose h2:first-child{margin-top:0}
.prose a{color:var(--text-strong);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(255,255,255,.3)}
.prose a:hover{text-decoration-color:#fff}
.prose .note{padding:16px 18px;border-radius:10px;background:var(--surface-popover);font-size:14px;line-height:1.6;color:var(--text-muted)}
.prose blockquote{margin:28px 0;padding-left:20px;border-left:1px solid rgba(255,255,255,.3);color:var(--text-strong);font-size:19px;line-height:1.55}
.art-end{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:48px;padding-top:28px}
.art-cta{margin-top:clamp(96px,10vw,160px);text-align:center}
.art-cta__t{font-size:clamp(34px,4.2vw,56px);line-height:1.04;letter-spacing:-.035em;color:var(--text-strong)}
.art-cta .sec__lede{margin:18px auto 0}
.art-cta .btn{margin-top:32px}
.blog-body .foot{margin-top:clamp(140px,14vw,220px)}

@media (max-width:1100px){
  .art-grid{grid-template-columns:minmax(0,680px);justify-content:center}
  .toc{display:none}
}
@media (max-width:980px){
  .posts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .feat{grid-template-columns:1fr}
  .feat .post__cover{min-height:0;aspect-ratio:16/9}
}
@media (max-width:640px){
  .posts{grid-template-columns:1fr}
  .blog-head{align-items:flex-start}
  .chips{flex-wrap:nowrap;overflow-x:auto;margin:0 calc(-1 * var(--gutter));padding:0 var(--gutter);scrollbar-width:none}
  .chips::-webkit-scrollbar{display:none}
  .chip{flex:none}
  .post__body{padding:20px 20px 18px}
  .art-hero{aspect-ratio:4/3}
  .prose{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  .sk *,.post,.post__type,.post__open{transition:none!important;animation:none!important}
}

/* v2 (Linear-style): no featured post; equal cards; framed image panel with text below */
.posts{margin-top:clamp(40px,5vw,64px);gap:56px 24px}
.post,.post--soon{background:none;border-radius:0;overflow:visible}
.post::before{content:none}
a.post:hover,a.post:focus-visible{background:none;box-shadow:none}
.post__cover{aspect-ratio:16/10;border-radius:10px;background:var(--surface-popover);box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);overflow:hidden;transition:box-shadow .3s ease,background-color .3s ease}
a.post:hover .post__cover{box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);background:#111117}
a.post:focus-visible .post__cover{box-shadow:inset 0 0 0 1px rgba(255,255,255,.14),0 0 0 2px var(--acc)}
.post__body{padding:20px 0 0}
.post__k{order:3;margin-top:14px}
.post__t{order:1;margin-top:0;font-size:clamp(18px,1.35vw,20px);line-height:1.3}
.post__p{order:2;margin-top:8px;font-size:15px;line-height:1.5;color:var(--text-muted)}
.post__meta{order:4;padding-top:18px}
.sk{background:none}
.sk pattern circle{fill:rgba(255,255,255,.07)}
.sk .ln{stroke:rgba(255,255,255,.7)}
.sk .draw{stroke-width:1.1}
.sk .bx{fill:var(--surface-popover);stroke:rgba(255,255,255,.4)}
.sk .bar{fill:rgba(255,255,255,.32)}
.sk .fl{fill:rgba(255,255,255,.06)}
a.post:hover .sk .mv--l{transform:translateX(-6px)}
a.post:hover .sk .mv--r{transform:translateX(6px)}
a.post:hover .sk .bar{transform:scaleY(1.25)}
.post--soon .post__cover{opacity:.6}
/* article hero: same framed panel, smaller */
.art-hero{max-width:880px;margin-left:auto!important;margin-right:auto!important;aspect-ratio:16/7;min-height:0;background:var(--surface-popover);box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
@media (max-width:980px){.posts{gap:48px 20px}}
@media (max-width:640px){.posts{gap:40px}.post__body{padding:16px 0 0}.art-hero{aspect-ratio:16/9}}

/* v3 (Expo-style, 2026-10-09) */
/* reveal transition must win over .post's own transition */
.post[data-reveal]{transition:opacity var(--dur-reveal) var(--ease-expo) var(--rd,0s),transform var(--dur-reveal) var(--ease-expo) var(--rd,0s)}
/* image panels: no resting border; one shade lighter + soft top glow; line fades in on hover */
.post__cover{background:#0b0c12;box-shadow:inset 0 0 0 1px rgba(255,255,255,0),var(--glow-top);transition:box-shadow var(--dur-ui) var(--ease-expo),background-color var(--dur-ui) var(--ease-expo)}
a.post:hover .post__cover{background:#101118;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12),inset 0 1.5px 24px rgba(255,255,255,.07)}
a.post:focus-visible .post__cover{background:#101118;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12),var(--glow-top),0 0 0 2px var(--acc)}
.art-hero{background:#0b0c12;box-shadow:var(--glow-top)}
a.post:hover .post__open span,a.post:focus-visible .post__open span{transform:translate(2px,-2px)}
/* sticky filter bar under the nav; slides to the top when the nav hides */
.blog-head{display:block}
.fbar{position:sticky;top:64px;z-index:15;margin:28px calc(-1 * var(--gutter)) 0;padding:14px var(--gutter) 28px;background:linear-gradient(to bottom,var(--page) 0,var(--page) 60%,rgba(2,4,10,0) 100%);transition:top .25s var(--ease-out,ease)}
body:has(.nav.is-hidden) .fbar{top:0}
.fbar + .posts{margin-top:4px}
@media (max-width:640px){.fbar{margin-top:20px;padding-top:10px;padding-bottom:20px}}
/* article: contents without a rail line (active = white + small dot); blockquote without a border */
.toc ol{border-left:0;gap:0}
.toc a{position:relative;margin-left:0;padding:5px 0 5px 14px;border-left:0}
.toc a::before{content:"";position:absolute;left:0;top:50%;width:4px;height:4px;margin-top:-2px;border-radius:50%;background:#fff;opacity:0;transform:scale(.4);transition:opacity var(--dur-ui) var(--ease-expo),transform var(--dur-ui) var(--ease-expo)}
.toc a.is-on{color:var(--text-strong)}
.toc a.is-on::before{opacity:1;transform:none}
.prose blockquote{border-left:0;padding-left:24px;font-size:21px;line-height:1.5;letter-spacing:-.01em;color:var(--text-strong)}
@media (prefers-reduced-motion:reduce){.fbar,.toc a::before{transition:none}}

/* v4 (2026-10-09): flat panels (lighter tone only), hover line/tone animates in, snaps back on hover-out */
.post__cover{background:#0b0c12;box-shadow:inset 0 0 0 1px rgba(255,255,255,0);transition:none}
a.post:hover .post__cover{background:#101118;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12);transition:box-shadow var(--dur-ui) var(--ease-expo),background-color var(--dur-ui) var(--ease-expo)}
a.post:focus-visible .post__cover{background:#101118;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12),0 0 0 2px var(--acc)}
.art-hero{background:#0b0c12;box-shadow:none}