:root {
  --bg: #fbfbfa; --fg: #1d1d1f; --muted: #6b6b70; --line: #e2e2e0; --card: #ffffff;
  --over: #d1601f; --under: #2a6fb0; --middle: #9a9a9a; --accent: #6a4fb3;
  --hl: 209, 96, 31;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161618; --fg: #ececee; --muted: #a0a0a6; --line: #2e2e33; --card: #1e1e21;
    --over: #f08a4b; --under: #6aa6e0; --middle: #77777c; --accent: #a58ce6; --hl: 240, 138, 75;
  }
}
:root[data-theme="dark"] {
  --bg: #161618; --fg: #ececee; --muted: #a0a0a6; --line: #2e2e33; --card: #1e1e21;
  --over: #f08a4b; --under: #6aa6e0; --middle: #77777c; --accent: #a58ce6; --hl: 240, 138, 75;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
header, main { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; border-bottom: 1px solid var(--line); }
h1 { font-size: 1.4rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 24px 0 8px; }
.sub, .note { color: var(--muted); max-width: 900px; }
code { font-size: 0.9em; }
nav { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 12px; }
nav a { padding: 8px 14px; color: var(--muted); text-decoration: none; border-bottom: 2px solid transparent; }
nav a.active { color: var(--fg); border-bottom-color: var(--accent); }
.tab { display: none; padding: 16px 0 40px; }
.tab.active { display: block; }
.plot { width: 100%; height: 560px; }
.plot.short { height: 320px; }
.stats { font-weight: 600; }
.table-wrap { overflow-x: auto; margin-top: 8px; }
table { border-collapse: collapse; width: 100%; background: var(--card); }
th, td { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { cursor: pointer; white-space: nowrap; user-select: none; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: rgba(var(--hl), 0.08); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 10px; color: #fff; font-size: 0.85em; }
.badge.over { background: var(--over); } .badge.under { background: var(--under); } .badge.middle { background: var(--middle); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin: 12px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; }
.card .k { color: var(--muted); font-size: 0.85em; }
.card .v { font-size: 1.05rem; }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .cols { grid-template-columns: 1fr; } .plot { height: 420px; } }
.win { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; margin: 6px 0;
       font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; word-break: break-word; }
.win .meta { color: var(--muted); font-size: 11px; display: block; }
.tok { border-radius: 2px; }
button { background: var(--card); color: var(--fg); border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; cursor: pointer; }
select { background: var(--card); color: var(--fg); border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; }
a { color: var(--accent); }
/* Exp 2 post-trained generators (exp2_rollout_gap/design.md G37) */
:root { --sft: #2f8f5b; --dpo: #b0417a; --instruct: #8c6d1f; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --sft: #5cc28a; --dpo: #e07aae; --instruct: #c9a54a; }
}
:root[data-theme="dark"] { --sft: #5cc28a; --dpo: #e07aae; --instruct: #c9a54a; }
/* Exp 2 diagnostics (exp2_rollout_gap/design.md G61) */
.diag-figs { display: grid; grid-template-columns: 1fr 2fr; gap: 12px; margin: 8px 0 16px; align-items: start; }
.diag-figs img { width: 100%; }
@media (max-width: 760px) { .diag-figs { grid-template-columns: 1fr; } }
table.diag { font-size: 0.9em; margin-bottom: 8px; }
table.diag th, table.diag tbody tr { cursor: default; }
table.diag th { white-space: normal; vertical-align: bottom; }
table.diag td .nm { display: block; min-width: 260px; max-width: 420px; }
/* Tabs merged, key results marked (exp2_rollout_gap/design.md G75, G76) */
.toc { font-size: 0.92em; }
nav a { max-width: 620px; }
h3 { font-size: 1rem; margin: 20px 0 6px; }
.scrolly { max-height: 680px; overflow: auto; }
table.diag tr.pooled td { border-top: 2px solid var(--line); }
/* Rollouts tab: visible results and dropdowns (exp2_rollout_gap/design.md G80-G82) */
details.more { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 0 14px; margin: 8px 0; }
details.more > summary { cursor: pointer; padding: 10px 0; font-weight: 600; }
details.more[open] { padding-bottom: 14px; }
details.more.sub { background: var(--bg); }
details.more.sub > summary { font-weight: 500; font-size: 0.95em; }
details.name-more { margin-top: 2px; }
details.name-more > summary { cursor: pointer; color: var(--muted); font-size: 0.85em; }
#tab-rollouts .cols { align-items: start; }
#tab-rollouts .cols > * { min-width: 0; }
#tab-rollouts .cols table.diag td .nm { min-width: 0; }
/* Additional experiments tab (exp2_rollout_gap/design.md G94) */
.heat-wrap { overflow-x: auto; }
.plot.heat { height: 430px; min-width: 760px; }
#tab-additional .cols { align-items: start; }
#tab-additional .cols > * { min-width: 0; }
#tab-additional .cols table.diag td .nm { min-width: 0; }
h2.exp-title { font-size: 1.25rem; margin-top: 8px; }
/* Coverage lists (design.md G100): two steps checked with the dataviz validator, light and dark */
:root { --cov-a: #6a4fb3; --cov-b: #d1601f; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --cov-a: #8b72d6; --cov-b: #d9763a; } }
:root[data-theme="dark"] { --cov-a: #8b72d6; --cov-b: #d9763a; }
hr.exp-sep { border: 0; border-top: 1px solid var(--line); margin: 36px 0 8px; }