/* Author: GPT-6.1 Sol (reasoning effort not exposed)
Date: 12-November-2026
PURPOSE: Responsive editorial layout for evidence-heavy run browsing, task reading and comparison.
SRP/DRY check: Pass — shared styles across all server-rendered viewer routes. */
:root{color-scheme:dark;--bg:#111719;--panel:#192225;--ink:#eef2ea;--muted:#a3b2b3;--accent:#b9e278;--line:#344146}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.55}header{max-width:1440px;margin:auto;padding:28px 6%;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.brand{font-weight:800;letter-spacing:.12em;color:var(--ink);font-size:22px}.brand span{font-size:10px;color:var(--muted);display:inline-block;margin-left:18px}.badge,.eyebrow{font-family:monospace;font-size:11px;letter-spacing:.13em;color:var(--accent)}.badge{border:1px solid var(--line);padding:6px 10px}.eyebrow{margin:28px 0 16px}main{max-width:1440px;margin:auto;padding:36px 6% 90px}h1{font-size:clamp(32px,5vw,66px);font-weight:500;line-height:1.08;letter-spacing:-.045em;margin:18px 0 24px;overflow-wrap:anywhere}h2{font-weight:500;font-size:24px;margin-top:36px}h3{font-weight:500;font-size:21px;overflow-wrap:anywhere}.intro{color:var(--muted);max-width:700px;font-size:17px}.count{font-family:monospace;font-size:14px;color:var(--muted);margin-left:10px}.compare-controls{display:flex;gap:18px;align-items:end;padding:20px 0 30px;flex-wrap:wrap}label{display:grid;gap:8px;font-size:13px;color:var(--muted);min-width:0}select,button{font:inherit;padding:12px;border:1px solid var(--line);border-radius:2px;background:var(--panel);color:var(--ink);max-width:100%}select{width:320px}button{background:var(--accent);color:var(--bg);font-weight:700;cursor:pointer}.run-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,340px),1fr));gap:16px}.run-card{display:block;padding:24px;background:var(--panel);border:1px solid var(--line);color:var(--ink)}.run-card:hover{border-color:var(--accent);text-decoration:none}.run-card .eyebrow{margin-top:0}.metric{font-family:monospace;font-size:30px;color:var(--accent)}.metric span{font-size:12px;color:var(--muted)}dl{display:grid;grid-template-columns:105px 1fr;gap:10px;font-size:12px}dt{color:var(--muted)}dd{margin:0;overflow-wrap:anywhere}.link{display:block;color:var(--accent);margin-top:25px}.empty{padding:24px;border:1px dashed var(--line);color:var(--muted)}pre{font-family:monospace;font-size:13px;white-space:pre-wrap;overflow-wrap:anywhere;padding:22px;border:1px solid var(--line);background:#0c1113;max-height:70vh;overflow:auto}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:16px 12px;vertical-align:top}th{font-size:11px;letter-spacing:.07em;color:var(--muted)}small{display:block;font-size:11px;color:var(--muted);overflow-wrap:anywhere}summary{cursor:pointer;color:var(--accent);padding:14px 0}footer{border-top:1px solid var(--line);padding:22px 6%;font-size:12px;color:var(--muted)}footer a{margin-left:16px}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}@media(max-width:600px){.brand span{display:block;margin-left:0}.badge{font-size:9px}header{gap:15px}.compare-controls label,.compare-controls button{width:100%}select{width:100%}main{padding-top:20px}td,th{padding:12px 8px}}

/* Compact ARC-style scoreboard and independent evidence panes; mobile stays in normal document flow. */
h1{font-size:clamp(25px,3vw,36px);letter-spacing:-.025em;line-height:1.2}header{padding-top:15px;padding-bottom:15px}main{padding-top:22px}.intro{font-size:14px}.eyebrow{margin:18px 0 8px}th,td{padding:10px 12px}th{position:sticky;top:0;background:var(--panel)}caption{text-align:left;font-size:12px;color:var(--muted);padding:12px 0}.numeric{font-variant-numeric:tabular-nums}.subtle{font-size:13px;color:var(--muted)}input{font:inherit;padding:12px;background:var(--panel);color:var(--ink);border:1px solid var(--line);min-width:0}.review-summary,.review-toolbar{display:flex;gap:18px;flex-wrap:wrap;align-items:center}.status-block{font-size:12px;color:var(--muted);padding:10px 14px;border-left:2px solid var(--line)}.status-block b{font-size:22px;color:var(--ink);margin-right:6px}.outcome{font-size:12px;font-weight:700}.improved{color:#b9e278}.regressed{color:#ffa795}.unknown-outcome,.missing-record{color:#e5cc85}.review-toolbar{justify-content:space-between;margin:18px 0}.review-toolbar nav{display:flex;gap:24px}.review-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.review-panel{min-width:0;border:1px solid var(--line);background:var(--panel)}.panel-head{padding:16px;border-bottom:1px solid var(--line)}.panel-head h2{font-size:18px;margin:6px 0;overflow-wrap:anywhere}.panel-head p{margin:8px 0}.panel-body{padding:0 16px 16px;max-height:72vh;overflow:auto}.evidence-section{border-top:1px solid var(--line)}summary small{display:inline;margin-left:8px}.panel-body pre{font-size:12px;max-height:none;padding:12px}.panel-body .empty{padding:14px;font-size:12px}.panel-body summary{font-size:13px}.review-panel .eyebrow{margin:0}@media(max-width:760px){.review-columns{grid-template-columns:minmax(0,1fr)}.panel-body{max-height:none;overflow:visible}.review-toolbar nav{gap:12px}input{width:100%}}

/* ARC3-style top-level tabs and compact dataset browser share the existing palette. */
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px}header,main,.sitetabs{max-width:1440px}.sitetabs{display:flex;gap:6px;margin:0 auto;padding:10px 6%;border-bottom:1px solid var(--line)}.sitetabs a{padding:7px 16px;border:1px solid transparent;border-radius:6px;color:var(--muted);white-space:nowrap}.sitetabs a:hover{color:var(--ink);background:var(--panel);text-decoration:none}.sitetabs a.active{background:var(--panel);border-color:var(--line);font-weight:600;color:var(--ink)}h1{font-size:24px}.notice{padding:14px 18px;border-left:3px solid #e5cc85;background:var(--panel);color:var(--ink);margin:18px 0}.dataset-filters{display:flex;flex-wrap:wrap;align-items:end;gap:14px;margin:20px 0}.dataset-filters select{width:260px}.dataset-filters input{width:280px}.dataset-filters .snapshot-select{width:360px}.pager{display:flex;justify-content:space-between;margin:20px 0;gap:20px}.task-heading{max-width:1000px}.problem{max-height:none;line-height:1.65;tab-size:4}.source-info{font-size:12px;color:var(--muted);overflow-wrap:anywhere}.dataset-summary{display:flex;gap:28px;flex-wrap:wrap;color:var(--muted);margin:18px 0}.dataset-summary b{color:var(--ink)}.task-table td:nth-child(2){min-width:280px;max-width:650px}.task-table td:first-child{max-width:260px;overflow-wrap:anywhere}@media(max-width:600px){.sitetabs{padding:10px 12px;overflow-x:auto}.sitetabs a{padding:7px 12px}.dataset-filters label,.dataset-filters button{width:100%}.dataset-filters input,.dataset-filters select,.dataset-filters .snapshot-select{width:100%}.dataset-summary{gap:12px}header{padding:12px 5%}main{padding-left:5%;padding-right:5%}}