:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1020;
  color: #f8fafc;
  --panel: rgba(15, 23, 42, 0.86);
  --panel-2: rgba(2, 6, 23, 0.52);
  --border: rgba(255,255,255,0.13);
  --muted: #cbd5e1;
  --faint: #94a3b8;
  --accent: #93c5fd;
  --accent-strong: #60a5fa;
  --good: #86efac;
  --warn: #fde68a;
  --bad: #fca5a5;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 0; }
body {
  margin: 0;
  min-width: 0;
  min-height: 100vh;
  overflow-x: hidden;
  padding: clamp(10px, 1.5vw, 22px);
  background:
    radial-gradient(circle at 12% -8%, rgba(96,165,250,.34), transparent 31%),
    radial-gradient(circle at 96% 9%, rgba(168,85,247,.22), transparent 28%),
    radial-gradient(circle at 74% 110%, rgba(20,184,166,.18), transparent 32%),
    linear-gradient(135deg, #07101e 0%, #0f172a 48%, #111827 100%);
}
main { width: min(100%, 1600px); min-width: 0; margin: 0 auto; display: grid; gap: 18px; }
.panel {
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: clamp(14px, 1.45vw, 20px);
  background: linear-gradient(180deg, rgba(30,41,59,.88), var(--panel));
  box-shadow: 0 22px 64px rgba(0,0,0,.32), inset 0 1px 0 rgba(255,255,255,.04);
  backdrop-filter: blur(18px);
}
.hero-panel { display: flex; justify-content: space-between; gap: 24px; align-items: center; }
.hero-copy { min-width: 0; max-width: 980px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; flex: 0 0 auto; }
h1 { margin: 0 0 8px; font-size: clamp(1.8rem, 3vw, 2.7rem); letter-spacing: -.045em; }
h2 { margin: 0; font-size: 1.25rem; letter-spacing: -.02em; }
h3 { margin: 0 0 12px; font-size: .83rem; letter-spacing: .06em; text-transform: uppercase; color: #bfdbfe; }
p { margin: 0; color: var(--muted); line-height: 1.55; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: #bfdbfe; }
.eyebrow {
  display: inline-flex; width: fit-content; margin: 0 0 8px; padding: 5px 10px;
  border-radius: 999px; background: rgba(96,165,250,.14); color: #dbeafe;
  font-size: .72rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase;
}
button, .button-link {
  appearance: none; border: 0; border-radius: 999px; padding: 9px 13px;
  font: inherit; font-weight: 800; color: #0f172a;
  background: linear-gradient(180deg, #f8fafc, #cbd5e1); cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
button.primary { background: linear-gradient(180deg, #bfdbfe, #60a5fa); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.danger { background: linear-gradient(180deg, #fecaca, #f87171); }
button.small { padding: 6px 9px; font-size: .75rem; }
button.active, button[aria-pressed="true"] { box-shadow: 0 0 0 3px rgba(147,197,253,.2); background: linear-gradient(180deg,#dbeafe,#93c5fd); }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 10px; min-width: 0; }
.section-copy { margin-bottom: 14px; font-size: .9rem; }
.status-pill {
  display: inline-flex; align-items: center; min-height: 30px; padding: 5px 10px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12); background: rgba(15,23,42,.68); color: #cbd5e1;
  font-size: .78rem; font-weight: 850; white-space: nowrap;
}
.status-pill[data-state="ready"], .status-pill[data-state="good"] { color: #dcfce7; border-color: rgba(134,239,172,.35); background: rgba(22,101,52,.23); }
.status-pill[data-state="busy"] { color: #dbeafe; border-color: rgba(147,197,253,.38); background: rgba(30,64,175,.23); }
.status-pill[data-state="warn"] { color: #fef3c7; border-color: rgba(253,230,138,.38); background: rgba(146,64,14,.23); }

/* v5 setup is full-width: nothing sticky or overlaid on the game/reward panels. */
.training-setup-panel { display: grid; gap: 14px; }
.setup-heading { margin-bottom: 0; }
.setup-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.setup-card {
  min-width: 0;
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 14px;
  border: 1px solid rgba(255,255,255,.09);
  border-radius: 17px;
  background: rgba(2,6,23,.31);
}
.setup-card h3 + .field, .setup-card h3 + .two-col { margin-top: -2px; }
.setup-note { color: #94a3b8; font-size: .76rem; line-height: 1.45; }
.strong-note { color: #cbd5e1; }
.controller-button-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; }
.controller-button-grid span {
  display: grid; place-items: center; min-height: 36px; padding: 6px 8px; border-radius: 11px;
  border: 1px solid rgba(147,197,253,.18); background: rgba(30,64,175,.15); color: #dbeafe;
  font-size: .75rem; font-weight: 900;
}
.training-command-row { display: grid; grid-template-columns: auto minmax(260px, 1fr); gap: 12px; align-items: center; }
.train-actions, .local-actions, .reward-test-bar, .discovery-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.training-status { min-height: 44px; display: flex; align-items: center; padding: 9px 12px; border-radius: 14px; background: rgba(2,6,23,.42); color: #bfdbfe; font-size: .8rem; line-height: 1.4; }
.training-dashboard { display: grid; grid-template-columns: minmax(330px, .7fr) minmax(420px, 1.3fr); gap: 12px; align-items: stretch; }
.metric-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.metric-grid > div { min-width: 0; padding: 10px; border-radius: 14px; background: rgba(2,6,23,.42); border: 1px solid rgba(255,255,255,.08); }
.metric-grid span { display: block; color: #94a3b8; font-size: .65rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 900; }
.metric-grid strong { display: block; margin-top: 3px; color: #f8fafc; font-size: .95rem; font-variant-numeric: tabular-nums; overflow: hidden; text-overflow: ellipsis; }
#rewardChart { display: block; width: 100%; height: 138px; border-radius: 14px; background: rgba(2,6,23,.42); border: 1px solid rgba(255,255,255,.08); }

input, select {
  width: 100%; min-width: 0; min-height: 38px; border: 1px solid rgba(255,255,255,.14); border-radius: 12px;
  background: rgba(2,6,23,.72); color: #f8fafc; padding: 8px 10px; font: inherit; outline: none;
}
input:focus, select:focus { border-color: rgba(147,197,253,.75); box-shadow: 0 0 0 3px rgba(147,197,253,.12); }
.field { display: grid; gap: 6px; min-width: 0; color: #dbeafe; font-size: .78rem; font-weight: 800; }
.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.input-suffix { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; border: 1px solid rgba(255,255,255,.14); border-radius: 12px; overflow: hidden; background: rgba(2,6,23,.72); }
.input-suffix input { border: 0; border-radius: 0; box-shadow: none; }
.input-suffix span { color: #94a3b8; padding: 0 9px; font-size: .75rem; font-weight: 800; }
.check-row { display: flex; align-items: center; gap: 8px; color: #dbeafe; font-size: .82rem; font-weight: 760; }
.check-row input { width: 17px; height: 17px; min-height: 0; accent-color: var(--accent-strong); flex: 0 0 auto; }
.storage-estimate { border: 1px solid rgba(255,255,255,.09); border-radius: 14px; padding: 9px 11px; background: rgba(2,6,23,.35); color: #a7f3d0; font-size: .76rem; }
.compact-field { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: .78rem; font-weight: 750; }
.compact-field select { min-width: 104px; width: auto; }

.runtime-panel { overflow: hidden; }
.runtime-stage {
  width: fit-content; max-width: 100%; min-height: 0; margin: 0 auto; display: grid; place-items: center;
  border-radius: 14px; overflow: hidden; background: #05070d; border: 1px solid rgba(255,255,255,.1); padding: 8px;
}
/* The embedded emulator is deliberately native NES size. Its own aiTraining
   embed mode also forces the internal framebuffer to 256x240, so the preview
   can never crop because of a remembered 2x/3x emulator scale. */
.runtime-stage iframe {
  display: block; width: 256px; height: 240px; max-width: 100%; min-width: 0; min-height: 0;
  border: 0; background: #07090f; border-radius: 8px; overflow: hidden;
}
.runtime-toolbar { margin-top: 12px; display: flex; align-items: center; justify-content: center; gap: 7px; flex-wrap: wrap; }
.runtime-toolbar button { padding: 8px 11px; font-size: .8rem; }
.runtime-meta { margin-top: 10px; color: #bfdbfe; font-size: .78rem; line-height: 1.4; }
.runtime-key-note { color: #a7f3d0; }
.checkpoint-line { display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin-top:10px; color:#94a3b8; font-size:.78rem; }

.local-data { border: 1px solid rgba(255,255,255,.1); border-radius: 16px; overflow: hidden; background: rgba(2,6,23,.3); }
.local-data summary { padding: 10px 12px; color: #bfdbfe; font-size: .78rem; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; cursor: pointer; }
.local-data > div, .local-data > select, .local-data > p { margin: 0 10px 10px; }
#savedProfiles { width: calc(100% - 20px); min-height: 100px; }
.small-note { font-size: .72rem; color: #94a3b8; }

.rule-table-wrap { width: 100%; max-width: 100%; overflow-x: auto; overscroll-behavior-inline: contain; border: 1px solid rgba(255,255,255,.09); border-radius: 16px; }
.rule-table { width: max(100%, 1580px); border-collapse: collapse; }
.rule-table th, .rule-table td { padding: 7px; border-bottom: 1px solid rgba(255,255,255,.07); text-align: left; vertical-align: middle; }
.rule-table th { color: #93c5fd; font-size: .66rem; text-transform: uppercase; letter-spacing: .07em; background: rgba(2,6,23,.4); white-space: nowrap; }
.rule-table td { color: #e2e8f0; font-size: .78rem; }
.rule-table input, .rule-table select { min-height: 34px; padding: 6px 8px; border-radius: 10px; }
.rule-table .toggle-cell input { width: 17px; height: 17px; min-height: 0; accent-color: var(--accent-strong); }
.rule-table .value-cell { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: #a7f3d0; min-width: 90px; }
.rule-table td:nth-child(3) input { min-width: 180px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.rule-table td:nth-child(4) select { min-width: 150px; }
.rule-table td:nth-child(5) select { min-width: 190px; }
.rule-table td:nth-child(6) input { min-width: 90px; max-width: 120px; }
.reward-test-bar { margin-top: 12px; }
.reward-test-bar strong { margin-left: auto; color: #a7f3d0; font-variant-numeric: tabular-nums; }
.event-log { margin-top: 10px; min-height: 72px; max-height: 180px; overflow: auto; white-space: pre-wrap; padding: 10px 12px; border-radius: 14px; background: rgba(2,6,23,.48); color: #cbd5e1; font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace; }
.observation-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 430px), 1fr)); gap: 8px; }
.observation-card { display: grid; grid-template-columns: minmax(110px, 1fr) minmax(180px, 1.15fr) minmax(170px, .9fr) auto; gap: 6px; align-items: center; padding: 8px; border: 1px solid rgba(255,255,255,.09); border-radius: 14px; background: rgba(2,6,23,.34); }
.observation-card input, .observation-card select { min-width: 0; min-height: 34px; }
.discovery-actions { margin-bottom: 12px; }
.discovery-actions .compact-field { min-width: 220px; }
.discovery-actions .compact-field select { min-width: 180px; }
.discovery-actions .scan-value-field { min-width: 200px; }
.discovery-actions .scan-value-field input { width: 150px; min-width: 120px; }
.scan-results { min-height: 90px; max-height: 340px; overflow: auto; display: grid; gap: 5px; }
.scan-row { display: grid; grid-template-columns: 90px 70px 70px 1fr auto auto; gap: 8px; align-items: center; padding: 7px 9px; border-radius: 12px; background: rgba(2,6,23,.34); border: 1px solid rgba(255,255,255,.07); font-size: .76rem; }
.scan-row code { color: #bfdbfe; font-weight: 850; }
.scan-row .delta-pos { color: #86efac; }
.scan-row .delta-neg { color: #fca5a5; }
.replay-archive { display: grid; gap: 8px; }
.replay-generation { border: 1px solid rgba(255,255,255,.09); border-radius: 16px; background: rgba(2,6,23,.32); overflow: hidden; }
.replay-generation > summary { cursor: pointer; padding: 10px 12px; color: #dbeafe; font-weight: 850; }
.replay-run { display: grid; grid-template-columns: 72px 110px 1fr auto; gap: 10px; align-items: center; padding: 8px 12px; border-top: 1px solid rgba(255,255,255,.06); color: #cbd5e1; font-size: .78rem; }
.page-drop-overlay { position: fixed; inset: 16px; z-index: 9999; display: grid; place-items: center; pointer-events: none; opacity: 0; transform: scale(.985); transition: 120ms ease; border: 3px dashed rgba(147,197,253,.84); border-radius: 30px; background: rgba(15,23,42,.8); color: #dbeafe; font-size: clamp(1.2rem,4vw,2rem); font-weight: 900; text-align: center; }
body.page-dragover .page-drop-overlay { opacity: 1; transform: scale(1); }

@media (max-width: 1280px) {
  .setup-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .training-dashboard { grid-template-columns: 1fr; }
  #rewardChart { height: 160px; }
}
@media (max-width: 820px) {
  .hero-panel { align-items: flex-start; flex-direction: column; }
  .hero-actions { justify-content: flex-start; }
  .setup-grid { grid-template-columns: 1fr; }
  .training-command-row { grid-template-columns: 1fr; }
  .controller-mode-pill { white-space: normal; text-align: center; }
  .runtime-stage { min-height: 0; padding: 6px; }
  .runtime-stage iframe { width: 256px; height: 240px; max-width: 100%; min-height: 0; }
  .observation-card { grid-template-columns: 1fr 1fr; }
  .observation-card button { justify-self: end; }
  .scan-row { grid-template-columns: 80px 65px 65px 1fr; }
  .scan-row button { grid-column: span 2; }
  .replay-run { grid-template-columns: 64px 90px 1fr; }
  .replay-run button { grid-column: 1 / -1; justify-self: start; }
}
@media (max-width: 560px) {
  .panel { border-radius: 19px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .two-col, .metric-grid { grid-template-columns: 1fr 1fr; }
  .controller-button-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reward-test-bar strong { width: 100%; margin-left: 0; }
  .observation-card { grid-template-columns: 1fr; }
  .scan-row { grid-template-columns: 1fr 1fr; }
  .scan-row button { grid-column: auto; }
}

/* v7 UI pass: give setup controls more breathing room and make important
   experiment state/actions visible without turning the page into a sidebar. */
.setup-summary { display: flex; justify-content: flex-end; gap: 7px; flex-wrap: wrap; min-width: 0; }
.setup-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.setup-card { padding: 16px; gap: 12px; }
.card-title-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-width: 0; }
.card-title-row h3 { margin-bottom: 0; }
.mini-actions { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
button.subtle { color: #dbeafe; background: rgba(30,64,175,.16); border: 1px solid rgba(147,197,253,.18); }
button.subtle:hover:not(:disabled) { background: rgba(30,64,175,.28); border-color: rgba(147,197,253,.35); }
button.danger-outline { color: #fecaca; background: rgba(127,29,29,.16); border: 1px solid rgba(248,113,113,.32); }
button.danger-outline:hover:not(:disabled) { background: rgba(127,29,29,.28); border-color: rgba(248,113,113,.55); }

.controller-button-grid { grid-template-columns: repeat(4, minmax(92px, 1fr)); gap: 8px; }
.controller-toggle { position: relative; min-width: 0; cursor: pointer; }
.controller-toggle input {
  position: absolute; width: 1px; height: 1px; min-height: 0; opacity: 0; pointer-events: none;
}
.controller-toggle > span {
  display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; padding: 8px 10px;
  border-radius: 12px; border: 1px solid rgba(148,163,184,.15); background: rgba(15,23,42,.55); color: #94a3b8;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease, transform 120ms ease;
}
.controller-toggle > span strong { font-size: .8rem; }
.controller-toggle > span small { color: #64748b; font: 700 .66rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.controller-toggle input:checked + span {
  border-color: rgba(96,165,250,.52); background: linear-gradient(180deg, rgba(37,99,235,.24), rgba(30,64,175,.16)); color: #eff6ff;
  box-shadow: inset 0 0 0 1px rgba(147,197,253,.08);
}
.controller-toggle input:checked + span small { color: #bfdbfe; }
.controller-toggle input:focus-visible + span { outline: 3px solid rgba(147,197,253,.22); outline-offset: 2px; }
.controller-toggle:hover > span { transform: translateY(-1px); border-color: rgba(147,197,253,.34); }
.controller-toggle input:disabled + span { opacity: .48; cursor: not-allowed; transform: none; }

.generation-data-row {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center;
  padding: 12px 14px; border: 1px solid rgba(248,113,113,.16); border-radius: 16px;
  background: linear-gradient(90deg, rgba(127,29,29,.08), rgba(2,6,23,.28));
}
.generation-data-row > div { min-width: 0; display: grid; gap: 3px; }
.generation-data-row strong { color: #f8fafc; font-size: .8rem; }
.generation-data-row span { color: #94a3b8; font-size: .75rem; line-height: 1.45; }

.training-command-row { padding-top: 2px; }
.train-actions button { min-height: 40px; }
#startTrainingBtn { min-width: 128px; }
.local-data[open] { box-shadow: inset 0 1px 0 rgba(255,255,255,.03); }
.local-actions { padding-top: 2px; }

@media (max-width: 1280px) {
  .setup-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .setup-summary { justify-content: flex-start; }
  .setup-grid { grid-template-columns: 1fr; }
  .generation-data-row { grid-template-columns: 1fr; }
  .generation-data-row button { justify-self: start; }
}
@media (max-width: 560px) {
  .controller-button-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card-title-row { align-items: flex-start; flex-direction: column; }
  .mini-actions { justify-content: flex-start; }
}

/* v8 observation ranges + throughput pass */
.section-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.performance-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin: 14px 0 2px;
  padding: 11px 13px;
  border: 1px solid rgba(52,211,153,.18);
  border-radius: 14px;
  background: rgba(6,78,59,.12);
}
.performance-note strong { color: #a7f3d0; white-space: nowrap; }
.performance-note span { color: #b9c7dc; font-size: .76rem; line-height: 1.45; }

.observation-budget {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: center;
  margin: 0 0 12px;
  padding: 10px 12px 13px;
  overflow: hidden;
  border: 1px solid rgba(147,197,253,.13);
  border-radius: 13px;
  background: rgba(2,6,23,.3);
}
.observation-budget strong { color: #dbeafe; font-size: .8rem; font-variant-numeric: tabular-nums; }
.observation-budget span { color: #94a3b8; font-size: .72rem; line-height: 1.4; }
.observation-budget i { position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: linear-gradient(90deg, #60a5fa var(--fill), rgba(148,163,184,.12) var(--fill)); }
.observation-card { grid-template-columns: minmax(100px,.9fr) minmax(190px,1.25fr) minmax(160px,.85fr) auto auto; }
.observation-input-count {
  min-width: 74px;
  padding: 5px 7px;
  border-radius: 999px;
  text-align: center;
  font-size: .66rem;
  font-weight: 900;
  white-space: nowrap;
  color: #bfdbfe;
  background: rgba(37,99,235,.12);
  border: 1px solid rgba(96,165,250,.18);
}
.observation-input-count[data-state="warn"] { color: #fde68a; background: rgba(161,98,7,.14); border-color: rgba(251,191,36,.22); }
.observation-input-count[data-state="bad"] { color: #fecaca; background: rgba(127,29,29,.15); border-color: rgba(248,113,113,.22); }

@media (max-width: 900px) {
  .performance-note { grid-template-columns: 1fr; gap: 4px; }
  .performance-note strong { white-space: normal; }
  .observation-card { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .section-actions { width: 100%; justify-content: stretch; }
  .section-actions button { flex: 1 1 auto; }
  .observation-budget { grid-template-columns: 1fr; }
  .observation-card { grid-template-columns: 1fr; }
  .observation-input-count { justify-self: start; }
}

/* v9: compact cadence editor for continuous reward rules. */
.reward-frequency-cell {
  min-width: 138px;
}
.reward-frequency-cell input,
.reward-frequency-cell select {
  display: block;
  width: 100%;
  min-width: 0;
}
.reward-frequency-cell select {
  margin-top: 5px;
}

/* v10 learning-context additions */
.learning-context{margin-top:14px;padding:12px;border:1px solid rgba(148,163,184,.18);border-radius:12px;background:rgba(15,23,42,.34);display:grid;gap:7px}.learning-context>strong{font-size:.92rem}.learning-context .check-row{margin:0}.learning-context .setup-note{margin:3px 0 0}.metric-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr))}

.progress-assist-row{flex-wrap:wrap}.inline-number{display:inline-flex;align-items:center;gap:5px;margin-left:auto;color:var(--muted,#94a3b8);font-size:.82rem}.inline-number input{width:72px}

/* v13 trajectory-memory controls */
.field-wide { grid-column: 1 / -1; }
#trainingStrategy { min-width: 0; }
@media (max-width: 720px) { .field-wide { grid-column: auto; } }