/* Under-the-hood lab: compositor-only motion (transform/opacity), no layout thrash. */
.lab-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:40px;margin-top:30px}
.lab-pick{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--line)}
.lab-pick button{all:unset;box-sizing:border-box;cursor:pointer;padding:14px 4px;min-height:44px;border-bottom:1px solid var(--line);font-size:15px;line-height:1.5;color:var(--ink);display:flex;gap:12px;align-items:baseline}
.lab-pick button::before{content:'';flex:none;width:8px;height:8px;border:1.5px solid var(--green);border-radius:50%;transform:translateY(-1px)}
.lab-pick button[aria-pressed="true"]{color:var(--green);font-weight:650}
.lab-pick button[aria-pressed="true"]::before{background:var(--green)}
.lab-pick button:hover{color:var(--green)}
.lab-pick button:focus-visible,.lab-btn:focus-visible,.lab-toggle:focus-visible{outline:3px solid var(--green);outline-offset:2px}
.lab-card{background:var(--navy);color:var(--white);padding:28px 30px;min-height:260px}
.lab-card .evidence-label{color:var(--lime)}
.lab-card h3{font-size:22px;line-height:1.35;margin:10px 0 12px;font-weight:600}
.lab-card p{font-size:15px;line-height:1.7;color:#D5E2D6}
.lab-proof{display:block;margin-top:18px;padding-top:14px;border-top:1px solid #3B5B58;font:12.5px/1.6 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--lime);overflow-wrap:anywhere}
.lab-race{margin-top:30px;border:1px solid var(--line);background:var(--white);padding:26px}
.lab-controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.lab-btn{all:unset;box-sizing:border-box;cursor:pointer;min-height:44px;padding:0 20px;display:inline-flex;align-items:center;background:var(--navy);color:var(--white);font-size:14px;font-weight:650}
.lab-btn.quiet{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.lab-btn:hover{background:#244A43;color:var(--white)}
.lab-toggle{all:unset;box-sizing:border-box;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;gap:10px;font-size:14px;margin-left:auto}
.lab-toggle i{width:42px;height:24px;border-radius:12px;background:#9BA8A4;position:relative;transition:background .2s}
.lab-toggle i::after{content:'';position:absolute;left:3px;top:3px;width:18px;height:18px;border-radius:50%;background:var(--white);transition:transform .2s}
.lab-toggle[aria-pressed="true"] i{background:var(--green)}
.lab-toggle[aria-pressed="true"] i::after{transform:translateX(18px)}
.lab-lanes{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:10px;min-height:156px;align-content:start}
.lab-lane{display:grid;grid-template-columns:78px minmax(0,1fr) minmax(0,150px);gap:14px;align-items:center;font-size:13px}
.lab-lane code{font:12px ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.lab-track{height:10px;background:#E6EBE2;position:relative;overflow:hidden}
.lab-bar{position:absolute;inset:0;background:var(--green);transform:scaleX(0);transform-origin:left;transition:transform linear}
.lab-lane[data-state="stale"] .lab-bar{background:#8B9692}
.lab-lane[data-state="bug"] .lab-bar{background:#A4472F}
.lab-lane .lab-out{color:var(--muted)}
.lab-lane[data-state="bug"] .lab-out{color:#8A3622;font-weight:650}
.lab-lane[data-state="ok"] .lab-out{color:var(--green);font-weight:650}
.lab-screen{margin-top:20px;display:flex;flex-wrap:wrap;gap:6px 18px;align-items:baseline;padding-top:16px;border-top:1px solid var(--line)}
.lab-screen strong{font-size:28px;font-variant-numeric:tabular-nums;color:var(--ink)}
.lab-screen span{font-size:14px;color:var(--muted)}
.lab-note{font-size:13.5px;line-height:1.7;color:var(--muted);margin-top:14px;max-width:70ch}
@media(max-width:750px){.lab-grid{grid-template-columns:1fr;gap:26px}.lab-lane{grid-template-columns:62px minmax(0,1fr)}.lab-lane .lab-out{grid-column:1/-1}.lab-toggle{margin-left:0}}
@media(prefers-reduced-motion:reduce){.lab-bar,.lab-toggle i,.lab-toggle i::after{transition:none!important}}
#field-to-code .hero-description,#race .hero-description{color:var(--muted);max-width:62ch;margin-top:18px}
/* AI Lab */
.lab-intro{max-width:62ch;color:var(--muted);margin-top:18px}
.ai-grid{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:40px;margin-top:30px;align-items:start}
.ai-roles{display:flex;flex-wrap:wrap;gap:8px}
.ai-role{all:unset;box-sizing:border-box;cursor:pointer;min-height:44px;padding:0 16px;display:inline-flex;align-items:center;border:1px solid var(--ink);font-size:14px;font-weight:600;color:var(--ink)}
.ai-role[aria-checked="true"]{background:var(--navy);color:var(--white);border-color:var(--navy)}
.ai-role:focus-visible,.ai-form input:focus-visible{outline:3px solid var(--green);outline-offset:2px}
.ai-who{font-size:14px;line-height:1.7;color:var(--muted);margin:14px 0 22px}
.ai-ask .evidence-label{margin-bottom:8px}
.ai-form{margin-top:22px}.ai-form label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.ai-row{display:flex;gap:10px;flex-wrap:wrap}
.ai-row input{flex:1 1 220px;min-width:0;min-height:44px;padding:0 12px;border:1px solid var(--ink);background:var(--white);color:var(--ink);font:inherit;font-size:15px}
.ai-out{background:var(--navy);color:var(--white);padding:26px 28px;min-height:320px}
.ai-out .evidence-label{color:var(--lime)}
.ai-empty{font-size:15px;color:#D5E2D6;margin-top:10px}
.ai-q{font-size:15px;color:#D5E2D6;margin:8px 0 14px;overflow-wrap:anywhere}
.ai-body{border-left:3px solid var(--lime);padding-left:16px;margin-bottom:20px}
.ai-body[data-kind="abstain"]{border-color:#E5C27A}.ai-body[data-kind="conflict"]{border-color:#E9A07F}
.ai-claim{font-size:17px;line-height:1.6}.ai-claim+.ai-claim{margin-top:10px}
.ai-cite{font:12.5px ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--lime)}
.ai-note{font-size:13.5px;line-height:1.6;color:#B9CCBF;margin-top:10px}
.ai-stages{list-style:none;margin:0;padding:0;display:grid;gap:0;border-top:1px solid #3B5B58}
.ai-stage{display:grid;grid-template-columns:110px minmax(0,1fr);gap:12px;padding:10px 0;border-bottom:1px solid #3B5B58;font-size:13.5px;line-height:1.5}
.ai-stage strong{color:var(--lime);font-weight:600}.ai-stage span{color:#D5E2D6;overflow-wrap:anywhere}
.ai-stage[data-state="warn"] strong{color:#E5C27A}.ai-stage[data-state="bad"] strong{color:#F0A58A}
.ai-time{font-size:14px;color:var(--muted)}
.ai-score{margin-top:24px;display:grid;gap:12px;max-width:640px}
.ai-score-row{display:grid;grid-template-columns:120px minmax(0,1fr) 48px;gap:14px;align-items:center;font-size:14px}
.ai-cat{text-transform:capitalize;color:var(--ink)}
.ai-bar{height:10px;background:#E6EBE2;position:relative;overflow:hidden}
.ai-bar::after{content:'';position:absolute;inset:0;background:var(--green);transform:scaleX(var(--w,0));transform-origin:left}
.ai-score-row strong{font-variant-numeric:tabular-nums;text-align:right}
.ai-known{margin-top:26px;max-width:640px;border:1px solid #C9A25A;background:#FBF3DF;color:#4A3A12;padding:18px 20px;font-size:15px;line-height:1.7}
.ai-known .evidence-label{color:#7A5B12}
.ai-diagram{margin:30px 0 10px;max-width:920px}.ai-diagram svg{width:100%;height:auto;display:block}
.ai-diagram figcaption{font-size:14px;line-height:1.7;color:var(--muted);margin-top:12px;max-width:70ch}
.ai-notes{max-width:920px}
@media(max-width:750px){.ai-grid{grid-template-columns:1fr;gap:26px}.ai-stage{grid-template-columns:1fr;gap:2px}.ai-score-row{grid-template-columns:96px minmax(0,1fr) 44px}}

.ai-right{display:grid;gap:18px;min-width:0}
.ai-meta{margin-top:14px;font:12.5px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--lime)}
.ai-log{border:1px solid var(--line);background:var(--white);padding:16px 18px}
.ai-log ol{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:6px}
.ai-log li{display:grid;grid-template-columns:76px minmax(0,1fr) 58px;gap:10px;font-size:13px;line-height:1.5;align-items:baseline}
.ai-log-k{font:11.5px ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;text-transform:uppercase;color:var(--green)}
.ai-log-k[data-kind="abstain"]{color:#8A6516}.ai-log-k[data-kind="conflict"]{color:#8A3622}
.ai-log-q{color:var(--ink);overflow-wrap:anywhere}.ai-log-ms{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}
.ai-stats{margin-top:24px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;max-width:760px}
.ai-stat{border-top:2px solid var(--green);padding-top:10px}.ai-stat strong{display:block;font-size:22px;font-variant-numeric:tabular-nums;color:var(--ink)}.ai-stat span{font-size:13px;color:var(--muted)}
.ai-stat-note{grid-column:1/-1;font-size:13.5px;line-height:1.7;color:var(--muted);max-width:70ch}
.ai-table-wrap{overflow-x:auto;margin-top:26px}
.ai-signals{min-width:640px}.ai-signals th[scope="row"]{text-align:left;font-weight:600;color:var(--ink);width:24%}
.ai-chip{display:inline-block;padding:3px 10px;font:12px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;border:1px solid currentColor;white-space:nowrap}
.ai-chip[data-s="shown"]{color:#1F5A3E;background:#E3F0E1}.ai-chip[data-s="partial"]{color:#6B4F0E;background:#FBF1D6}.ai-chip[data-s="none"]{color:#7A2E1D;background:#F8E4DD}
@media(max-width:750px){.ai-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.ai-log li{grid-template-columns:64px minmax(0,1fr) 52px}}
.ai-signals a,.lab-intro a,.ai-notes a{color:var(--green);text-decoration:underline;text-underline-offset:3px}.ai-signals a:focus-visible,.lab-intro a:focus-visible{outline:3px solid var(--green);outline-offset:2px}
.ai-mode{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.ai-mode-btn[aria-pressed="true"]{background:var(--ink);color:var(--white)}
.ai-own{margin-bottom:16px}.ai-own label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.ai-own textarea{width:100%;box-sizing:border-box;min-height:150px;padding:10px 12px;border:1px solid var(--ink);background:var(--white);color:var(--ink);font:13px/1.5 ui-monospace,Menlo,Consolas,monospace;resize:vertical}
.ai-own textarea:focus-visible,.ai-own input:focus-visible{outline:3px solid var(--green);outline-offset:2px}
.ai-own-help{font-size:13px;color:var(--muted);margin:8px 0 12px}
.ai-own .ai-own-crew{flex:1 1 100%;margin:0}
.ai-own-status{font-size:13px;margin-top:10px}.ai-own-status[data-state="bad"]{color:#8a2d1d}.ai-own-status[data-state="ok"]{color:var(--green)}
.ai-mode-btn[aria-pressed="false"]{background:var(--white);color:var(--ink);border:1px solid var(--ink)}