/* AI Training Lab — v14
   A workbench, not a landing page: flat surfaces, hairline rules, one accent.
   Only two things on the page are dark, and both are screens: the game and
   the data readouts (reward chart, event log). */

:root {
  --bench:      #e8e9eb;
  --surface:    #ffffff;
  --sunken:     #f3f4f6;
  --line:       #d8dbe0;
  --line-2:     #c1c6cd;
  --ink:        #14161a;
  --ink-2:      #545a63;
  --ink-3:      #7b828b;
  --accent:     #1740c6;
  --accent-tint:#e9edfb;
  --good:       #14663f;
  --good-tint:  #e2f1e9;
  --warn:       #825200;
  --warn-tint:  #f7eedc;
  --bad:        #a8221b;
  --bad-tint:   #fae7e5;
  --screen:     #0c0f14;
  --screen-ink: #c9d1d9;

  --r:    10px;
  --r-s:   6px;
  --pad:  clamp(14px, 1.5vw, 20px);
  --gutter: clamp(16px, 3vw, 32px);
  --shell: 1560px;
  --runbar: 62px;

  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bench:      #101216;
    --surface:    #16181d;
    --sunken:     #1b1e24;
    --line:       #272b32;
    --line-2:     #383e47;
    --ink:        #e8eaee;
    --ink-2:      #a3aab4;
    --ink-3:      #79808a;
    --accent:     #7fa5ff;
    --accent-tint:#1b2740;
    --good:       #6ed49b;
    --good-tint:  #16281f;
    --warn:       #e4b25a;
    --warn-tint:  #2a2213;
    --bad:        #f0837b;
    --bad-tint:   #2e1a19;
    --screen:     #08090c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; min-width: 0; }
[hidden] { display: none !important; }

body {
  margin: 0;
  padding: 0 0 64px;
  background: var(--bench);
  color: var(--ink);
  font: 400 14px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.011em; }
h1 { font-size: 1.5rem; letter-spacing: -0.022em; }
h2 { font-size: 0.98rem; }
h3 { font-size: 0.84rem; color: var(--ink); }
p  { margin: 0; }
code { font: 0.86em var(--mono); color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ---------- shell ---------- */

.bench-head,
.runbar,
.bench { max-width: var(--shell); margin-inline: auto; padding-inline: var(--gutter); }

.bench-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: end;
  gap: 12px 28px;
  padding-block: 26px 18px;
}
.head-title p {
  max-width: 62ch;
  margin-top: 6px;
  color: var(--ink-2);
}
.head-rom { display: grid; gap: 6px; justify-items: start; }
.rom-line {
  max-width: 40ch;
  color: var(--ink-3);
  font: 0.72rem/1.4 var(--mono);
  overflow-wrap: anywhere;
}
.head-actions { display: flex; align-items: center; gap: 14px; }

/* ---------- run bar ---------- */

.runbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  min-height: var(--runbar);
  padding-block: 11px;
  background: var(--bench);
  border-block: 1px solid var(--line);
}
.runbar-actions { display: flex; gap: 8px; }
.runbar-status {
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 1 1 260px;
  color: var(--ink-2);
  font-size: 0.82rem;
}
.runbar-status::before {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-2);
}
.runbar-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-left: auto; }

/* Live state, derived from the trainer's own button states — no extra JS. */
.runbar:has(#stopTrainingBtn:not(:disabled)) { box-shadow: inset 0 2px 0 var(--accent); }
.runbar:has(#stopTrainingBtn:not(:disabled)) .runbar-status { color: var(--ink); }
.runbar:has(#stopTrainingBtn:not(:disabled)) .runbar-status::before {
  background: var(--accent);
  animation: blink 1.7s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: 0.25; } }

/* ---------- layout ---------- */

.bench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 356px;
  align-items: start;
  gap: 16px;
  padding-top: 16px;
}
.bench-main, .bench-rail { display: grid; gap: 16px; }
.bench-rail {
  position: sticky;
  top: calc(var(--runbar) + 16px);
  max-height: calc(100vh - var(--runbar) - 32px);
  overflow: auto;
  overscroll-behavior: contain;
}

.panel {
  padding: var(--pad);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.panel-sub { flex: 1 1 220px; color: var(--ink-2); font-size: 0.82rem; }
.panel-head > .status-pill,
.panel-head > button,
.panel-head > .head-buttons { margin-left: auto; }
.head-buttons { display: flex; gap: 8px; }

.note {
  color: var(--ink-3);
  font-size: 0.78rem;
  line-height: 1.5;
  max-width: 78ch;
}

.explainer { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 10px; }
.explainer > summary {
  cursor: pointer;
  width: fit-content;
  color: var(--ink-2);
  font-size: 0.78rem;
}
.explainer > summary:hover { color: var(--accent); }
.explainer p {
  margin-top: 10px;
  max-width: 78ch;
  color: var(--ink-2);
  font-size: 0.82rem;
}

/* ---------- controls ---------- */

button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-s);
  background: var(--surface);
  color: var(--ink);
  font: 500 0.82rem var(--sans);
  cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--ink-3); background: var(--sunken); }
button:disabled { opacity: 0.42; cursor: not-allowed; }
button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}
button.primary:hover:not(:disabled) { filter: brightness(1.1); background: var(--accent); }
button.danger { border-color: var(--bad); color: var(--bad); background: var(--surface); }
button.danger:hover:not(:disabled) { background: var(--bad-tint); }
button.small { height: 27px; padding: 0 9px; font-size: 0.76rem; }

@media (prefers-color-scheme: dark) {
  button.primary { color: #0b1220; }
}

.button-link {
  color: var(--ink-2);
  font-size: 0.84rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--line-2);
}
.button-link:hover { color: var(--accent); text-decoration-color: currentColor; }

input[type="text"], input[type="number"], select {
  height: 32px;
  padding: 0 8px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-s);
  background: var(--surface);
  color: var(--ink);
  font: 400 0.84rem var(--sans);
}
input[type="number"] { font-variant-numeric: tabular-nums; }
select { padding-right: 4px; }
select[size] { height: auto; padding: 4px; font-size: 0.78rem; }
input:focus-visible, select:focus-visible { border-color: var(--accent); outline-offset: 0; }
input:disabled, select:disabled { opacity: 0.5; cursor: not-allowed; }
input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--accent); }

.field { display: grid; gap: 5px; font-size: 0.76rem; color: var(--ink-2); }
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.field-wide { grid-column: 1 / -1; }
.field-inline { grid-auto-flow: column; align-items: center; gap: 7px; }
.suffixed { position: relative; display: block; }
.suffixed input { width: 100%; padding-right: 34px; }
.suffixed span {
  position: absolute;
  right: 9px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-3);
  font-size: 0.72rem;
  pointer-events: none;
}

.checks { display: grid; gap: 9px; }
.check { display: flex; align-items: center; gap: 9px; font-size: 0.82rem; color: var(--ink); }
.check-inline { flex-wrap: wrap; }
.inline-number { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-3); font-size: 0.74rem; }
.inline-number input { width: 72px; height: 27px; }

.status-pill {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 8px;
  border: 1px solid var(--line-2);
  border-radius: 5px;
  background: var(--sunken);
  color: var(--ink-2);
  font-size: 0.73rem;
  font-weight: 500;
  white-space: nowrap;
}
.status-pill[data-state="ready"],
.status-pill[data-state="good"] { border-color: var(--good); background: var(--good-tint); color: var(--good); }
.status-pill[data-state="busy"] { border-color: var(--accent); background: var(--accent-tint); color: var(--accent); }
.status-pill[data-state="warn"] { border-color: var(--warn); background: var(--warn-tint); color: var(--warn); }
.status-pill[data-state="bad"]  { border-color: var(--bad);  background: var(--bad-tint);  color: var(--bad); }

/* ---------- screens ---------- */

.screen {
  border: 1px solid var(--line-2);
  border-radius: var(--r-s);
  background: var(--screen);
  overflow: hidden;
}
#rewardChart { display: block; width: 100%; height: auto; }

.event-log {
  margin-top: 12px;
  min-height: 76px;
  max-height: 180px;
  overflow: auto;
  padding: 10px 12px;
  white-space: pre-wrap;
  color: var(--screen-ink);
  font: 12px/1.5 var(--mono);
}

/* ---------- training setup ---------- */

.groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 28px; }
.group { display: grid; align-content: start; gap: 12px; }
.group-span { grid-column: 1 / -1; }
.group-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.group-actions { display: flex; gap: 7px; }
.group-actions.wrap { flex-wrap: wrap; }

.controller-button-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.controller-toggle { position: relative; cursor: pointer; }
.controller-toggle input {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}
.controller-toggle > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line-2);
  border-radius: var(--r-s);
  background: var(--surface);
  color: var(--ink-3);
}
.controller-toggle > span strong { font: 500 0.82rem var(--sans); }
.controller-toggle > span small { font: 0.68rem var(--mono); }
.controller-toggle input:checked + span {
  border-color: var(--accent);
  background: var(--accent-tint);
  color: var(--accent);
}
.controller-toggle input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.controller-toggle input:disabled + span { opacity: 0.42; cursor: not-allowed; }

.danger-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.danger-row strong { display: block; font-size: 0.82rem; font-weight: 600; }
.danger-row span { color: var(--ink-3); font-size: 0.78rem; }

/* ---------- reward rules ---------- */

.rule-table-wrap {
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--line);
  border-radius: var(--r-s);
}
.rule-table { width: max(100%, 1520px); border-collapse: collapse; }
.rule-table th, .rule-table td {
  padding: 7px 8px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--line);
}
.rule-table th {
  background: var(--sunken);
  color: var(--ink-2);
  font: 500 0.72rem var(--sans);
  white-space: nowrap;
}
.rule-table tr:last-child td { border-bottom: 0; }
.rule-table input, .rule-table select { height: 30px; font-size: 0.79rem; }
.rule-table .toggle-cell { text-align: center; }
.rule-table .value-cell {
  min-width: 92px;
  color: var(--good);
  font: 0.79rem var(--mono);
  font-variant-numeric: tabular-nums;
}
.rule-table .reward-frequency-cell { display: flex; gap: 5px; }
.rule-table .reward-frequency-cell input { width: 74px; }
.rule-table td:nth-child(3) input { min-width: 170px; font-family: var(--mono); }
.rule-table td:nth-child(4) select { min-width: 148px; }
.rule-table td:nth-child(5) select { min-width: 186px; }
.rule-table td:nth-child(6) input { width: 88px; }
.rule-table td:nth-child(9) input { width: 88px; }

.reward-test-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
.reward-test-bar strong {
  margin-left: auto;
  color: var(--good);
  font: 500 0.84rem var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- observations ---------- */

.observation-budget {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  margin-bottom: 12px;
  padding: 10px 12px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  background: var(--sunken);
  overflow: hidden;
}
.observation-budget strong { font: 500 0.82rem var(--mono); font-variant-numeric: tabular-nums; }
.observation-budget span { color: var(--ink-3); font-size: 0.75rem; }
.observation-budget i {
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) var(--fill), var(--line) var(--fill));
}

.observation-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr)); gap: 8px; }
.observation-card {
  display: grid;
  grid-template-columns: minmax(96px, .9fr) minmax(168px, 1.2fr) minmax(150px, .85fr) auto auto;
  gap: 6px;
  align-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  background: var(--sunken);
}
.observation-card input, .observation-card select { height: 30px; font-size: 0.79rem; }
.observation-card input[data-field="addressText"] { font-family: var(--mono); }
.observation-card button { width: 27px; height: 27px; padding: 0; }
.observation-input-count {
  padding: 3px 7px;
  border: 1px solid var(--line-2);
  border-radius: 5px;
  color: var(--ink-2);
  font-size: 0.68rem;
  text-align: center;
  white-space: nowrap;
}
.observation-input-count[data-state="good"] { border-color: var(--good); color: var(--good); background: var(--good-tint); }
.observation-input-count[data-state="warn"] { border-color: var(--warn); color: var(--warn); background: var(--warn-tint); }
.observation-input-count[data-state="bad"]  { border-color: var(--bad);  color: var(--bad);  background: var(--bad-tint); }

/* ---------- memory finder ---------- */

.finder-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 10px 12px;
  margin-bottom: 12px;
}
.finder-controls .field { min-width: 190px; }
.finder-buttons { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.finder-filters { display: inline-flex; gap: 4px; padding-left: 8px; border-left: 1px solid var(--line); }

.scan-results { display: grid; gap: 4px; min-height: 84px; max-height: 340px; overflow: auto; }
.scan-row {
  display: grid;
  grid-template-columns: 88px 68px 68px 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  background: var(--sunken);
  font-size: 0.77rem;
  font-variant-numeric: tabular-nums;
}
.scan-row code { color: var(--ink); font-weight: 500; }
.scan-row .delta-pos { color: var(--good); }
.scan-row .delta-neg { color: var(--bad); }
.small-note { color: var(--ink-3); font-size: 0.76rem; }

/* ---------- replays ---------- */

.replay-archive { display: grid; gap: 6px; color: var(--ink-3); font-size: 0.82rem; }
.replay-generation {
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  background: var(--sunken);
  overflow: hidden;
}
.replay-generation > summary {
  cursor: pointer;
  padding: 9px 12px;
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 500;
}
.replay-run {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px 16px;
  padding: 7px 12px;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 0.77rem;
  font-variant-numeric: tabular-nums;
}
.replay-run strong { min-width: 38px; color: var(--ink); font-family: var(--mono); }
.replay-run button { margin-left: auto; }

/* ---------- rail: game + readout ---------- */

.runtime-stage { display: grid; place-items: center; padding: 8px; }
.runtime-stage iframe {
  display: block;
  width: 256px;
  height: 240px;
  max-width: 100%;
  border: 0;
  background: var(--screen);
}
.runtime-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 12px; }
.runtime-toolbar .field { font-size: 0.72rem; }
.runtime-toolbar select { height: 27px; font-size: 0.76rem; }
.runtime-panel .note { margin-top: 10px; }
.checkpoint-block {
  display: grid;
  justify-items: start;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.checkpoint-block .runtime-toolbar { margin-top: 0; }

.readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-s);
  overflow: hidden;
}
.readout div { display: grid; gap: 3px; padding: 8px 10px; background: var(--surface); }
.readout div:last-child { grid-column: 1 / -1; }
.readout span { color: var(--ink-3); font-size: 0.7rem; }
.readout strong {
  color: var(--ink);
  font: 500 0.88rem var(--mono);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

/* ---------- drag and drop ---------- */

.page-drop-overlay {
  position: fixed;
  inset: 14px;
  z-index: 999;
  display: grid;
  place-items: center;
  padding: 24px;
  border: 2px dashed var(--accent);
  border-radius: var(--r);
  background: color-mix(in srgb, var(--bench) 88%, transparent);
  color: var(--accent);
  font-size: clamp(1rem, 3vw, 1.5rem);
  font-weight: 500;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease;
}
body.page-dragover .page-drop-overlay { opacity: 1; }

/* ---------- responsive ---------- */

@media (max-width: 1180px) {
  .bench { grid-template-columns: 1fr; }
  .bench-rail { position: static; max-height: none; overflow: visible; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
}
@media (max-width: 980px) {
  .bench-head { grid-template-columns: 1fr; align-items: start; }
  .head-rom { justify-items: start; }
  .groups { grid-template-columns: 1fr; }
  .bench-rail { grid-template-columns: 1fr; }
  .runbar-chips { margin-left: 0; }
}
@media (max-width: 620px) {
  .runbar-actions { flex-wrap: wrap; }
  .field-row { grid-template-columns: 1fr; }
  .controller-button-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .observation-card { grid-template-columns: 1fr 1fr; }
  .observation-card button { justify-self: end; }
  .scan-row { grid-template-columns: 84px 1fr 1fr; }
  .scan-row button { grid-column: span 1; }
  .replay-run button { margin-left: 0; }
  .danger-row { grid-template-columns: 1fr; }
  .reward-test-bar strong { width: 100%; margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}