/* ── page-local additions not yet in lab.css ── */
.art-header{padding:clamp(56px,8vh,88px) clamp(24px,5vw,80px) clamp(24px,3vh,32px);max-width:1120px;margin:0 auto;border-bottom:1px solid var(--border)}
.art-kicker{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin-bottom:20px;display:flex;align-items:center;gap:10px}
.art-kicker::before{content:'';width:18px;height:1px;background:var(--accent)}
.art-title{font-size:clamp(32px,4.6vw,58px);line-height:1.08;letter-spacing:-.02em;margin-bottom:20px;max-width:780px}
.art-deck{font-family:var(--sans);font-size:clamp(14px,1vw,16px);color:var(--ink-3);line-height:1.7;max-width:560px;margin-bottom:24px}
.art-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-family:var(--sans);font-size:12px;color:var(--ink-4)}

.article-toc-label{margin-top:0}
.article-body h2{font-size:clamp(20px,2vw,26px);line-height:1.28;letter-spacing:-.01em;margin:0 0 14px}
.article-body h3{font-family:var(--serif);font-size:clamp(16px,1.3vw,18px);font-style:italic;font-weight:400;margin:28px 0 10px;color:var(--ink)}
.article-body p{margin-bottom:16px;line-height:1.75}
.article-body p:last-child{margin-bottom:0}
.article-body p.lead{font-size:clamp(16px,1.3vw,19px);line-height:1.65;margin-bottom:clamp(24px,3.5vh,36px)}
.article-body section{margin-top:clamp(44px,6.5vh,72px)}
.article-body code{font-family:ui-monospace,'SF Mono',monospace;font-size:.87em;background:var(--paper-2);padding:1px 6px;border-radius:4px;color:var(--ink-2)}

/* three memory layers */
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:clamp(24px,3.5vh,36px) 0}
@media(max-width:760px){.layers{grid-template-columns:1fr}}
.layer{border:1px solid var(--border);border-radius:10px;padding:clamp(20px,2.6vw,26px);transition:border-color .2s}
.layer:hover{border-color:var(--accent)}
.layer-tag{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2);background:var(--accent-soft);padding:4px 9px;border-radius:99px;display:inline-block;margin-bottom:14px}
.layer-name{font-family:var(--sans);font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
.layer-body{font-family:var(--sans);font-size:12.5px;color:var(--ink-3);line-height:1.65}
.layer-ttl{font-family:ui-monospace,'SF Mono',monospace;font-size:10.5px;color:var(--ink-4);margin-top:14px;padding-top:12px;border-top:1px solid var(--border)}

/* entity grid */
.entity-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;margin:clamp(20px,3vh,32px) 0}
.entity{border:1px solid var(--border);border-radius:8px;padding:14px;transition:border-color .2s}
.entity:hover{border-color:var(--accent)}
.entity-name{font-family:var(--sans);font-size:12.5px;font-weight:600;color:var(--ink);margin-bottom:4px}
.entity-desc{font-family:var(--sans);font-size:11.5px;color:var(--ink-3);line-height:1.55}

/* callout */
.callout{border-left:2px solid var(--accent);background:var(--accent-soft);border-radius:0 8px 8px 0;padding:clamp(16px,2.2vw,20px);margin:clamp(20px,3vh,32px) 0}
.callout-lbl{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2);margin-bottom:6px}
.callout p{font-family:var(--sans);font-size:13px;color:var(--ink-2);line-height:1.65;margin:0}

/* example exchange */
.exchange{border:1px solid var(--border);border-radius:10px;padding:clamp(18px,2.6vw,26px);margin:clamp(20px,3vh,32px) 0}
.exchange-label{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-4);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.exchange-label::after{content:'';flex:1;height:1px;background:var(--border)}
.msg{display:flex;gap:12px;margin-bottom:12px}
.msg:last-child{margin-bottom:0}
.msg-who{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;flex-shrink:0;padding-top:3px;min-width:36px;color:var(--ink-4)}
.msg-who.her{color:var(--accent-2)}
.msg-text{font-family:var(--sans);font-size:13px;color:var(--ink-2);line-height:1.6;margin:0}
.msg-memory{font-family:var(--sans);font-size:11.5px;color:var(--ink-4);font-style:italic;margin-top:4px;padding-left:10px;border-left:2px solid var(--border)}

/* pull quote */
.pq{border-left:2px solid var(--accent);padding-left:20px;margin:clamp(24px,3.5vh,36px) 0;max-width:540px}
.pq p{font-family:var(--serif);font-style:italic;font-size:clamp(17px,1.5vw,21px);line-height:1.5;color:var(--ink);margin:0}

/* icon-free tag row */
.tag-row{display:flex;gap:10px;flex-wrap:wrap;margin:clamp(20px,3vh,28px) 0}
.tag-chip{font-family:var(--sans);font-size:12px;color:var(--ink-2);border:1px solid var(--border);border-radius:99px;padding:7px 14px}

/* diagram wrap (d3) */
.diagram-wrap{border:1px solid var(--border);border-radius:10px;padding:clamp(20px,3vw,32px);margin:clamp(20px,3.5vh,36px) 0}
.diagram-label{font-family:var(--sans);font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-4);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.diagram-label::after{content:'';flex:1;height:1px;background:var(--border)}
.node-diagram{position:relative;min-height:260px}
.node-diagram svg{display:block;width:100%}
.node-panel{display:none;margin-top:12px;padding:14px 16px;border:1px solid var(--border);border-radius:8px;background:var(--paper-2)}
.node-panel-label{font-family:var(--sans);font-size:12px;font-weight:600;color:var(--ink);margin-bottom:4px}
.node-panel p{font-family:var(--sans);font-size:12.5px;color:var(--ink-3);line-height:1.6;margin:0}

/* dark closing card */
.dark-card{background:var(--ink);border-radius:12px;padding:clamp(32px,5vh,56px) clamp(24px,4vw,48px);margin:clamp(36px,6vh,64px) 0}
.dark-card h2{color:rgba(255,255,255,.94);max-width:560px}
.dark-card p{color:rgba(255,255,255,.6)}
.dark-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.dark-chip{font-family:var(--sans);font-size:11px;color:rgba(255,255,255,.55);background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:99px;padding:6px 13px}

.div{display:flex;align-items:center;gap:12px;margin:clamp(28px,4vh,44px) 0}
.div::before,.div::after{content:'';flex:1;height:1px;background:var(--border)}
.div span{font-family:var(--sans);font-size:9px;color:var(--ink-4);letter-spacing:.1em;text-transform:uppercase}