:root {
  color-scheme: dark;
  --bg: #0d1117;
  --surface: #151b24;
  --ink: #ecf1f8;
  --muted: #99a7ba;
  --line: #26303f;
  --accent: #81dbc5;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--bg); font: 16px/1.55 system-ui, sans-serif; }
.preview-banner { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 8px 16px; border-bottom: 1px solid #5d5031; background: #292516; color: #e8dfbd; font-size: .78rem; }
.preview-banner span { color: #cfc49f; }
main { max-width: 1160px; margin: auto; padding: 14px 24px 56px; }
a { color: var(--accent); }
h1, h2, h3, p { margin: 0 0 14px; }
h1 { font: 600 clamp(28px, 4vw, 36px)/1.1 system-ui, sans-serif; letter-spacing: -.04em; }
h2 { font: 550 22px/1.25 system-ui, sans-serif; letter-spacing: -.02em; }
h3 { font-size: 17px; font-weight: 550; margin-top: 24px; }
.page-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 0 10px; }
.page-header a { display: inline-block; text-decoration: none; }
.page-header p, .muted { color: var(--muted); }
.header-main, .header-actions { display: flex; align-items: center; }
.header-main { min-width: 0; gap: 17px; }
.header-actions { flex: 0 0 auto; gap: 10px; }
.page-header h1 { overflow: hidden; margin: 0; font-size: 25px; text-overflow: ellipsis; white-space: nowrap; }
.eyebrow { font-size: 12px; text-transform: uppercase; letter-spacing: .15em; }
section { border-top: 1px solid var(--line); padding: 30px 0; }
.section-heading { display: flex; gap: 12px; align-items: baseline; justify-content: space-between; }
.section-heading span { font-size: 13px; color: var(--accent); }
#training-toggle { color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; font: inherit; font-size: 13px; cursor: pointer; min-height: 34px; }
#training-toggle:hover { border-color: var(--accent); }
#training-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
#training-toggle:disabled { cursor: wait; opacity: .65; }
.muted { font-size: 14px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
select { color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 5px; padding: 9px 12px; font: inherit; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
output { color: var(--ink); font-variant-numeric: tabular-nums; }
details { font-size: 13px; margin-top: 6px; }
summary { color: var(--muted); cursor: pointer; width: fit-content; }
.swatch { display: inline-block; width: 10px; height: 10px; flex-shrink: 0; }
.chart { width: 100%; min-width: 0; }
.chart svg { display: block; width: 100%; overflow: visible; }
.chart svg text { font: 12px system-ui, sans-serif; fill: var(--muted); }
.chart .axis { stroke: var(--line); stroke-width: 1; }
.legend { display: flex; gap: 6px 18px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.legend span { display: inline-flex; gap: 6px; align-items: center; }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 34px; }
.chart-grid > div { min-width: 0; }
.empty { padding: 24px; background: var(--surface); color: var(--muted); border-left: 3px solid var(--accent); margin: 20px 0; }
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; padding: 20px 0; }
.metric strong { display: block; font-size: 25px; font-weight: 500; }
.metric span { color: var(--muted); font-size: 13px; }
.table-scroll { overflow-x: auto; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: right; white-space: nowrap; }
th { color: var(--muted); font-weight: 500; }
th:first-child, td:first-child { text-align: left; }
.error { color: #ffb4a4; }
[hidden] { display: none !important; }
@media (max-width: 650px) {
  main { padding: 20px 16px 40px; }
  .chart-grid { grid-template-columns: 1fr; }
  .section-heading { flex-wrap: wrap; gap: 0; }
  select { font-size: 16px; min-height: 44px; }
  summary { min-height: 32px; padding-top: 6px; }
}

body { background: var(--bg); }
.page-header a { color: var(--muted); font-size: 13px; }
.eyebrow { font-size: 10px; color: var(--accent); letter-spacing: .16em; margin-bottom: 8px; }
.training-section { border: 0; padding-top: 0; }
#training-phase { font-size: 15px; font-weight: 550; }
#training-phase-count { color: var(--accent); font-size: 13px; font-variant-numeric: tabular-nums; }
#training-phase-progress { display: block; width: 100%; height: 3px; margin-top: 7px; border: 0; border-radius: 4px; overflow: hidden; background: var(--line); accent-color: var(--accent); }
#training-phase-progress::-webkit-progress-bar { background: var(--line); }
#training-phase-progress::-webkit-progress-value { background: var(--accent); }
#training-phase-progress::-moz-progress-bar { background: var(--accent); }
#training-message { min-height: 22px; font-size: 13px; }
.learning-rate-control { max-width: 440px; min-width: 0; }
.learning-rate-control > label { margin-bottom: 5px; color: #cbd5df; font-size: 12px; font-weight: 550; }
.learning-rate-entry { display: flex; gap: 7px; }
.learning-rate-entry input { width: 100%; min-width: 0; color: var(--ink); background: #10151d; border: 1px solid var(--line); border-radius: 5px; padding: 7px 9px; font: inherit; font-size: 13px; font-variant-numeric: tabular-nums; }
.learning-rate-entry button { flex: 0 0 auto; border: 1px solid #40565c; border-radius: 5px; padding: 7px 12px; color: var(--ink); background: #293446; cursor: pointer; font: inherit; font-size: 12px; }
.learning-rate-entry :is(input, button):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.learning-rate-entry :is(input, button):disabled { cursor: not-allowed; opacity: .58; }
#learning-rate-status { display: block; min-height: 19px; margin-top: 6px; color: var(--accent); font-size: 12px; line-height: 1.4; }
#learning-rate-help { margin: 4px 0 0; color: var(--muted); font-size: 11px; line-height: 1.4; }
#learning-rate-error { margin: 5px 0 0; font-size: 11px; line-height: 1.4; }
.metrics { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1px; border: 1px solid var(--line); padding: 0; border-radius: 8px; overflow: hidden; background: var(--line); margin: 10px 0; }
.metric { padding: 8px 13px; background: var(--surface); }
.metric strong { font-size: 20px; letter-spacing: -.025em; font-variant-numeric: tabular-nums; }
.metric span { font-size: 12px; }
.best-policy { margin: 10px 0; padding: 11px 13px; border: 1px solid var(--line); border-radius: 9px; background: #111720; font-size: 13px; }
.best-policy p { margin: 0; }
.replay-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.replay-heading h3 { margin: 0; font-size: 18px; font-weight: 550; }
.replay-heading .muted { font-size: 12px; }
.replay-generation-controls { display: flex; align-items: center; gap: 7px; }
.replay-generation-controls label { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.replay-generation-controls :is(select, button) { min-height: 32px; border: 1px solid var(--line); border-radius: 6px; padding: 5px 9px; color: var(--ink); background: #171e28; font: inherit; font-size: 12px; }
.replay-generation-controls button { cursor: pointer; }
.replay-generation-controls button:disabled { cursor: default; opacity: .58; }
.replay-generation-controls :is(select, button):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.replay-heading + .muted { margin-top: 6px; }
.character-highlights { margin-top: 7px; }
.character-highlights > p { color: var(--muted); font-size: 12px; }
.run-highlights { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 5px; }
.run-highlight { display: flex; flex-direction: column; gap: 2px; min-width: 0; padding: 8px 11px; border-radius: 7px; border: 1px solid #303a48; background: #171e28; text-decoration: none; }
.run-highlight strong { font-size: 14px; font-weight: 550; }
.run-highlight span { color: var(--muted); font-size: 12px; }
.run-highlight:hover { border-color: var(--accent); }
.run-highlight.pending { border-style: dashed; opacity: .65; }
.run-highlight.pending small { color: var(--muted); font-size: 11px; }
@media (max-width: 520px) { .run-highlights { grid-template-columns: 1fr; } }
.best-policy .muted { font-size: 12px; }
.score-overview { position: relative; min-width: 0; padding: 13px 15px 10px; border: 1px solid var(--line); border-radius: 10px; background: #111720; }
.chart-panel-header { display: flex; min-height: 30px; align-items: baseline; justify-content: space-between; gap: 12px; }
.chart-panel-header h3 { margin: 0; font-size: 18px; font-weight: 550; }
.score-current { flex: 0 0 auto; text-align: right; }
.score-current strong { display: block; color: var(--ink); font-size: 22px; font-weight: 550; letter-spacing: -.03em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.chart-toolbar { display: flex; min-height: 38px; align-items: center; margin: 3px 0 4px; }
.chart-caption { display: flex; flex-wrap: wrap; min-height: 19px; align-items: flex-start; justify-content: space-between; gap: 2px 12px; margin-top: 2px; color: var(--muted); font-size: 11px; line-height: 1.35; }
.chart-caption span { min-width: 0; overflow: visible; white-space: normal; }
#score-era { flex: 1 1 260px; }
#score-change { flex: 0 1 auto; margin-left: auto; text-align: right; }
.segmented { display: inline-flex; flex-wrap: wrap; background: #0f141c; border: 1px solid var(--line); border-radius: 7px; padding: 2px; gap: 2px; }
.segmented button { min-height: 30px; border: 0; border-radius: 5px; padding: 5px 10px; color: var(--muted); background: none; cursor: pointer; font: inherit; font-size: 13px; }
.segmented button[aria-pressed="true"] { color: var(--ink); background: #293446; }
.segmented button:hover { color: var(--ink); }
.segmented button:focus-visible { outline: 2px solid var(--accent); }
.score-note { font-size: 12px; max-width: 950px; margin: 16px 0 25px; }
.panel { border: 1px solid var(--line); border-radius: 9px; background: #111720; margin: 8px 0; }
.panel > summary { width: 100%; padding: 12px 15px; color: var(--ink); font-size: 14px; }
.panel > summary span { margin-left: 14px; color: var(--muted); font-size: 12px; }
.panel-body { padding: 0 20px 18px; }
.chart-grid { gap: 22px; }
.chart-grid h3 { font-size: 14px; margin-top: 14px; }
.chart .axis { opacity: .7; stroke-dasharray: 3 5; }
.chart circle:hover { fill-opacity: 1; stroke: var(--ink); stroke-width: 2; }
.primary-charts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: 12px; }
.floor-overview { min-width: 0; }
.floor-views { display: flex; width: 100%; }
.floor-views button { flex: 1 1 auto; padding-inline: 8px; }
.floor-views button[aria-pressed="true"] { color: var(--ink); background: #2a3542; }
.dashboard-controls { display: flex; align-items: center; min-height: 38px; }
.generation-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; }
#generation-from-form { display: flex; gap: 8px; align-items: center; border: 1px solid transparent; border-radius: 8px; padding: 3px 6px; }
#generation-from-form.active { border-color: #40565c; background: #17242a; }
#generation-from-form label { font-size: 12px; }
#generation-from-form input { width: 72px; color: var(--ink); background: #10151d; border: 1px solid var(--line); border-radius: 5px; padding: 6px 8px; font: inherit; font-size: 13px; }
#generation-from-form button { border: 0; background: #293446; border-radius: 5px; color: var(--ink); font: inherit; font-size: 12px; padding: 7px 12px; cursor: pointer; }
#generation-from-form :is(button,input):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
#generation-window { margin: 2px 0 7px; font-size: 11px; }
.score-view-controls { justify-content: space-between; gap: 8px; }
.score-views button[aria-pressed="true"] { color: var(--ink); background: #2a3542; }
.score-plot { position: relative; }
.score-band { fill-opacity: .5; stroke-width: 0; }
.score-band.negative { fill-opacity: .35; }
.score-band:hover { fill-opacity: .75; }
.score-zero { stroke: #8997a6; stroke-width: 1; }
.score-total-line { fill: none; stroke: #e7eeef; stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; pointer-events: none; }
.score-total-hit { fill: none; stroke: transparent; stroke-width: 12; pointer-events: stroke; }
.score-line-swatch { width: 15px; height: 2px; background: #e7eeef; }
.score-change-marker { cursor: help; outline: none; }
.score-change-marker line { stroke: #99a4ac; stroke-dasharray: 3 5; opacity: .5; }
.score-change-marker rect { fill: #1b2932; stroke: #73848f; }
.score-change-marker text { fill: #cbd6dd; font-size: 10px; }
.score-change-marker:hover rect, .score-change-marker:focus-visible rect { stroke: var(--accent); }
.score-unavailable { stroke: #71808e; stroke-width: 2; stroke-dasharray: 2 7; opacity: .45; }
.replay-selection { stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 4 4; }
#score-tooltip { position: absolute; top: 0; max-width: 100%; padding: 4px 8px; font-size: 11px; line-height: 1.4; border: 1px solid #40505b; border-radius: 5px; background: #101820; color: var(--ink); pointer-events: none; z-index: 1; }
#score-total svg:focus-visible { outline: 1px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
@media (max-width: 800px) {
 .page-header { display: grid; gap: 8px; }
 .header-main, .header-actions { width: 100%; }
 .header-actions { justify-content: flex-end; }
}
@media (max-width: 650px) {
 .header-main { width: 100%; align-items: flex-start; flex-direction: column; gap: 3px; }
 .header-actions { width: 100%; justify-content: space-between; }
 .dashboard-controls { align-items: flex-start; }
 .score-view-controls { align-items: flex-start; flex-direction: column; }
 .chart-caption { align-items: flex-start; flex-direction: column; gap: 2px; }
 .chart-caption span { white-space: normal; }
 #score-era { flex-basis: auto; }
 #score-change { margin-left: 0; text-align: left; }
 .replay-heading { align-items: flex-start; flex-direction: column; }
 .replay-generation-controls { width: 100%; flex-wrap: wrap; }
}
@media (max-width: 900px) {
 .primary-charts { grid-template-columns: 1fr; }
}
@media (max-width: 650px) {
 .metrics { grid-template-columns: repeat(2, 1fr); }
 .score-overview { padding: 12px; }
 .score-current { min-width: 0; text-align: right; }
 .panel > summary span { display: block; margin: 4px 0 0; }
 .training-activity { grid-template-columns: minmax(0, 1fr); }
 .training-activity #training-message { white-space: normal; }
 .page-header h1 { font-size: 23px; }
}

/* One compact status in the application header. */
.page-header { min-height: 58px; gap: 24px; padding-bottom: 10px; }
.header-main { flex: 1 1 auto; gap: 24px; }
.header-actions { min-width: 0; }
.page-tabs { display: flex; align-items: center; gap: 3px; }
.page-tabs a { padding: 6px 11px; border-radius: 5px; font-size: 13px; }
.page-tabs a[aria-current] { color: var(--ink); background: #293446; }
.page-tabs a:hover { color: var(--ink); }
.training-activity { display: grid; gap: 1px; min-width: 0; text-align: right; }
#training-phase { font-size: 13px; }
#training-phase-count { font-size: 12px; }
#training-phase-progress { height: 2px; margin: 3px 0 0; }
#training-message { margin: 0 0 8px; font-size: 12px; }
@media (max-width: 650px) {
 .page-header { display: flex; flex-wrap: wrap; gap: 8px; }
 .header-main { flex-direction: row; align-items: center; justify-content: space-between; }
 .header-actions { justify-content: flex-end; }
 .training-activity { text-align: right; }
}