/* Shared note layout — extracted from templates/note/index.html:68 and notes/what-if-evaluation-had-three-dimensions/index.html:69
   Single source of truth for post/TOC/sidenote/feature-card/research-paper-link.
   Page-specific overrides (cubes/comparison/traj) remain inline per note.
   Version via ?v= query in HTML; cached via _headers /css/* immutable. */
:root{--highlight:#0F8A8D}
.venn-wrapper{position:relative;width:40%;line-height:0}
.venn-img{width:100%;height:auto}
.wip-img{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);margin-top:2.5%;width:20%;height:auto;z-index:1}
body.darkmode .venn-img,body.redmode .venn-img{filter:invert(1) hue-rotate(180deg)}
body.darkmode #header-logo img{filter:brightness(0) invert(0.94)}
.wip-img{filter:none!important}
@media (max-width:1200px){.venn-wrapper{width:75%}}
@media (max-width:768px){.venn-wrapper{width:100%}}
::view-transition-old(root){animation:none;mix-blend-mode:normal}
::view-transition-new(root){animation:vt-expand 0.5s ease-in-out;mix-blend-mode:normal}
@keyframes vt-expand{from{clip-path:circle(0 at var(--mouse-x) var(--mouse-y))}to{clip-path:circle(150% at var(--mouse-x) var(--mouse-y))}}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;margin:2rem 0}
.feature-card{border:1px solid color-mix(in srgb,var(--fg4) 20%,transparent);border-radius:10px;padding:1.5rem;transition:border-color .2s,box-shadow .2s}
.feature-card:hover{border-color:color-mix(in srgb,var(--accent) 50%,transparent);box-shadow:0 2px 12px color-mix(in srgb,var(--fg) 6%,transparent)}
.feature-card-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);font-family:var(--font-sans);font-weight:600;font-size:15px;margin-bottom:.75rem}
.feature-card h3{font-family:var(--font-sans);font-size:1.05rem;font-weight:600;margin:0 0 .5rem;font-style:normal!important;color:var(--fg)}
.feature-card p{font-size:.95rem;line-height:1.5;color:var(--fg2);margin:0!important}
@media (max-width:640px){.feature-grid{grid-template-columns:1fr}}
.post-cover{margin:0 0 2rem}
.post-cover+.post-cover{margin-top:0}
.post-cover + h2{margin-top:0}
.post-cover img{width:100%;border-radius:8px;display:block}
a.research-paper-link{display:inline-flex;align-items:center;gap:0.4rem;font-family:var(--font-sans);font-size:0.8rem;font-weight:600;color:#fff;background:var(--accent);border:1px solid var(--accent);border-radius:100px;padding:0.35rem 0.9rem;text-decoration:none;transition:background .2s,border-color .2s,filter .2s;margin:0 0 1.5rem;position:relative;overflow:hidden}
a.research-paper-link:hover{background:color-mix(in srgb,var(--accent) 86%, black);border-color:color-mix(in srgb,var(--accent) 86%, black)}
html.darkmode a.research-paper-link,html.redmode a.research-paper-link{color:#1a1a1a}
a.research-paper-link svg{width:14px;height:14px;flex-shrink:0}
.research-paper-shimmer{background:linear-gradient(90deg,currentColor 0%,currentColor 30%,color-mix(in srgb,currentColor 45%,transparent) 50%,currentColor 70%,currentColor 100%);background-size:200% auto;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:shimmer 8s ease-in-out infinite}
#main.post{max-width:none;padding:0;display:block}
#main.post .content{grid-column:2;padding:0.5rem 1rem 0}
.post-content-shell{display:grid;grid-template-columns:200px minmax(0,680px) 200px;gap:2rem;justify-content:center;margin-top:2rem}
.post-header-block{max-width:680px;margin:0 auto;padding:3rem 1rem 1rem}
.post-header-block h1{text-align:center;font-family:var(--font-serif);font-weight:600;font-size:2.6rem;line-height:1.3;margin:1.5rem auto 0}
.post-header-block .post-subtitle{text-align:center;font-style:italic;color:var(--fg2);max-width:560px;margin:0 auto 1.5rem}
.post-header-block .post-date{font-family:var(--font-sans);color:var(--fg4);font-size:15px;text-align:center;max-width:none;margin:0 auto 0.5rem}
.post-header-block .post-author{font-family:var(--font-sans);color:var(--fg3);font-size:15px;text-align:center;max-width:480px;margin:1rem auto 0.25rem}
.date-flip{display:block;text-align:center;position:relative}
.date-flip-inner{position:relative;display:block}
.date-flip-front,.date-flip-back{transition:all 0.2s ease-in-out;display:block;text-align:center;white-space:normal}
.date-flip-back{position:absolute;top:0;left:0;width:100%;opacity:0;transform:translateY(0.5em);pointer-events:none}
.date-flip.flipped .date-flip-front{opacity:0;transform:translateY(-0.5em);pointer-events:none}
.date-flip.flipped .date-flip-back{opacity:1;transform:translateY(0);pointer-events:auto}
.left-toc{grid-column:1;grid-row:1;position:sticky;top:0;align-self:start;padding:0;font-family:var(--font-sans);font-size:14px;max-height:calc(100vh - var(--site-header-height,54px) - 3rem);overflow-y:auto}
.left-toc ul{list-style:none;margin:0;padding:0}
.left-toc li{margin-bottom:0.5rem;line-height:1.4}
.left-toc a{color:var(--fg4);text-decoration:none;transition:color .15s}
.left-toc a:hover{color:var(--fg)}
.left-toc ul ul{padding-left:1rem;margin-top:0.25rem}
.left-toc ul ul li{margin-bottom:0.25rem}
.sidenote{float:right;clear:right;margin-right:-248px;width:200px;margin-top:0;margin-bottom:1.5rem;font-size:0.85rem;line-height:1.45;color:var(--fg4);font-family:var(--font-sans);text-align:left;user-select:none;-webkit-user-select:none}
.sidenote a{color:var(--accent)}
.content{counter-reset:sidenote-counter}
.sidenote-number{cursor:pointer;vertical-align:super;font-size:0.7rem;color:var(--accent);font-weight:600}
.margin-toggle{display:none}
.sidenote-number::before{counter-increment:sidenote-counter;content:"[" counter(sidenote-counter) "]"}
.sidenote-number::after{content:none}
@media (max-width:1200px){.post-content-shell{grid-template-columns:1fr;gap:0}.left-toc{display:none}#main.post .content{grid-column:1;padding:0.5rem 1rem 0}.sidenote{float:none;clear:none;display:none;width:auto}.sidenote-number{cursor:pointer}.sn-group:has(.margin-toggle:checked) .sidenote{display:inline-block;width:100%;margin-top:0.5rem;margin-bottom:1rem;padding:0.75rem;background:color-mix(in srgb,var(--fg4) 6%,transparent);border-radius:6px;font-size:0.85rem}}
@media (max-width:768px){.post-content-shell{grid-template-columns:1fr;gap:0}.left-toc{display:none}#main.post .content{grid-column:1;padding:0.5rem 1rem 0}.sidenote{float:none;clear:none;display:inline-block;width:100%;margin:0.5rem 0;padding:0.75rem;background:color-mix(in srgb,var(--fg4) 6%,transparent);border-radius:6px;font-size:0.85rem}.sn-group:has(.margin-toggle:checked) .sidenote{display:none}#main.post .content h2{margin-bottom:0.3em}.copy-section-btn{display:none}}
.theme-float{left:10px}
@media (max-width:768px){.theme-float{left:10px}}
.nav-group{padding-right:var(--nav-right-pad,1.5rem)}
.left-toc ul{padding-left:24px}
.left-toc li a{transition:color .15s;cursor:pointer}
.left-toc li.active>a{color:var(--fg);font-weight:600}
.left-toc li.active.toc-intro>a{color:var(--fg);font-weight:600}
.toc-dot{position:absolute;left:6px;width:6px;height:6px;border-radius:50%;background:var(--fg);pointer-events:none;transition:transform .2s ease}