/* Terminal look: black background, amber monospace text, dense panels. */
:root {
  --bg: #000;
  --panel: #050505;
  --line: #3a2a00;
  --amber: #ffb000;
  --amber-dim: #a87400;
  --white: #e6e6e6;
  --grey: #8c8c8c;
  --green: #2ee66b;
  --red: #ff4f4f;
  --cyan: #33c3ff;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--amber);
  font: 12px/1.35 var(--mono);
}

body { display: flex; flex-direction: column; height: 100vh; min-height: 640px; }

.dim { color: var(--amber-dim); font-weight: normal; }
.up { color: var(--green); }
.down { color: var(--red); }
b { color: var(--white); font-weight: 600; }

/* --- Top bar and status bar --------------------------------------------- */
.topbar {
  height: 28px;
  flex: none;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 10px;
  border-bottom: 1px solid var(--amber);
  white-space: nowrap;
  overflow: hidden;
}
.brand {
  background: var(--amber);
  color: #000;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 1px 8px;
}
.fn { color: var(--amber-dim); letter-spacing: 0.06em; }
.tape { color: var(--white); overflow: hidden; text-overflow: ellipsis; }
.tape .sep { color: var(--amber-dim); padding: 0 6px; }
.badge {
  border: 1px solid var(--amber);
  color: var(--amber);
  padding: 0 6px;
  letter-spacing: 0.06em;
  animation: blink 1.6s steps(2, start) 3;
}
@keyframes blink { to { visibility: hidden; } }
.clock { margin-left: auto; color: var(--amber); }

.statusbar {
  height: 22px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 10px;
  border-top: 1px solid var(--line);
  color: var(--amber-dim);
  white-space: nowrap;
  overflow: hidden;
}
#status { overflow: hidden; text-overflow: ellipsis; }
#status.error { color: var(--red); }
#status.ok { color: var(--green); }
#status.busy { color: var(--amber); }

/* --- Layout -------------------------------------------------------------- */
.grid {
  flex: 1;
  min-height: 0; /* let the panels scroll instead of growing the page */
  display: grid;
  gap: 3px;
  padding: 3px;
  grid-template-columns: 240px minmax(0, 1fr) 456px;
  grid-template-rows: minmax(0, 46fr) minmax(0, 30fr) minmax(0, 24fr);
  grid-template-areas:
    "controls price    metrics"
    "controls equity   trades"
    "controls drawdown trades";
}
.controls { grid-area: controls; overflow-y: auto; }
.price { grid-area: price; }
.equity { grid-area: equity; }
.drawdown { grid-area: drawdown; }
.metrics { grid-area: metrics; }
.trades { grid-area: trades; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}
.panel > h2 {
  flex: none;
  margin: 0;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber);
  background: #1a1200;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  overflow: hidden;
}
.key { margin-left: auto; font-weight: normal; color: var(--amber-dim); display: flex; gap: 6px; align-items: center; }
.key i { display: inline-block; width: 12px; height: 2px; vertical-align: middle; }
.key b { font-weight: normal; }
.k-close { background: var(--white); }
.k-fast { background: var(--cyan); }
.k-slow { background: var(--amber); }

.chart { position: relative; flex: 1; min-height: 0; padding: 4px 4px 2px; }
.chart canvas { position: absolute; inset: 4px 4px 2px; }
.scroll { flex: 1; min-height: 0; overflow: auto; }

/* --- Inputs -------------------------------------------------------------- */
form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 8px;
  padding: 8px;
}
.field { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.field.wide { grid-column: 1 / -1; }
label { color: var(--amber-dim); font-size: 10.5px; letter-spacing: 0.06em; }
label .dim { letter-spacing: 0; text-transform: none; }

input, button { font: inherit; }
input[type="text"], input[type="number"], input[type="date"] {
  width: 100%;
  background: #000;
  color: var(--white);
  border: 1px solid #4a3600;
  border-radius: 0;
  padding: 3px 5px;
}
input[type="text"] { text-transform: uppercase; color: var(--amber); font-weight: 700; }
input:focus { outline: 1px solid var(--amber); border-color: var(--amber); }
input:disabled { color: var(--grey); border-color: #262626; }
.field.invalid input { border-color: var(--red); outline-color: var(--red); }

.file-row { display: flex; gap: 6px; align-items: center; min-width: 0; }
input[type="file"] { color: var(--grey); font-size: 11px; min-width: 0; flex: 1; }
input[type="file"]::file-selector-button {
  font: inherit;
  background: #1a1200;
  color: var(--amber);
  border: 1px solid #4a3600;
  padding: 2px 6px;
  margin-right: 6px;
  cursor: pointer;
}

button.run {
  grid-column: 1 / -1;
  margin-top: 2px;
  background: var(--amber);
  color: #000;
  border: 0;
  padding: 6px;
  font-weight: 700;
  letter-spacing: 0.12em;
  cursor: pointer;
}
button.run:hover { background: #ffc640; }
button.run:disabled { background: var(--amber-dim); cursor: progress; }
button.run.secondary { margin-top: 0; background: none; color: var(--amber); border: 1px solid var(--amber); }
button.run.secondary:hover { background: #1a1200; }
button.run.secondary:disabled { color: var(--amber-dim); border-color: var(--amber-dim); }
label.check { display: flex; gap: 6px; align-items: center; cursor: pointer; color: var(--amber); }
label.check input { accent-color: var(--amber); margin: 0; }

.toggle { display: inline-flex; margin-left: 8px; }
.toggle button {
  font: inherit;
  font-size: 10px;
  background: none;
  color: var(--amber);
  border: 1px solid var(--amber-dim);
  padding: 0 6px;
  cursor: pointer;
}
.toggle button + button { border-left: 0; }
.toggle button.on { background: var(--amber); color: #000; }

button.ghost {
  background: none;
  border: 1px solid #4a3600;
  color: var(--amber);
  padding: 1px 6px;
  cursor: pointer;
  font-size: 11px;
}

.help { margin: 0 8px 8px; color: var(--amber-dim); font-size: 11px; }
.help a { color: var(--cyan); word-break: break-all; }

.info { margin: 0 8px 8px; border-top: 1px solid var(--line); padding-top: 6px; font-size: 11px; }
.info dt { color: var(--amber-dim); font-size: 10px; letter-spacing: 0.06em; margin-top: 4px; }
.info dd { margin: 0; color: var(--white); }
.info dd.note { color: var(--amber); }
details.rules summary { cursor: pointer; color: var(--amber-dim); font-size: 10px; letter-spacing: 0.06em; }
details.rules p { margin: 4px 0 0; color: var(--white); }

/* --- Tables -------------------------------------------------------------- */
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 2px 6px; text-align: right; white-space: nowrap; }
th {
  position: sticky;
  top: 0;
  background: var(--panel);
  color: var(--amber-dim);
  font-weight: normal;
  font-size: 10.5px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid #2a2a2a;
}
td { color: var(--white); border-bottom: 1px solid #121212; }
th.label, td.label { text-align: left; }
td.label { color: var(--amber); }
tr.sub td { color: var(--amber-dim); font-size: 10px; padding-top: 0; padding-bottom: 0; border-bottom-color: transparent; }
tr.sub td.label { padding-left: 16px; }
tbody tr:hover td { background: #141000; }
#metrics td { padding-top: 1px; padding-bottom: 1px; }
#metrics td:not(.label) { min-width: 96px; }
#metrics.three th, #metrics.three td { padding-left: 4px; padding-right: 4px; }
#trades th, #trades td { padding: 2px 4px; font-size: 11px; }
#trades td.reason { color: var(--amber-dim); }
#trades tr.open td { color: var(--amber); }
.empty { color: var(--amber-dim); text-align: left; padding: 8px; }

/* --- Trades / explain tabs ----------------------------------------------- */
h2.tabs { padding: 0 8px 0 0; }
h2.tabs .tab {
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: none;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--amber-dim);
  padding: 3px 10px;
  cursor: pointer;
}
h2.tabs .tab.on { background: var(--amber); color: #000; }
h2.tabs #trade-count { margin-left: 8px; }
.explain { padding: 8px 10px; }
.explain-label { margin: 0 0 8px; font-size: 11px; letter-spacing: 0.04em; color: var(--amber-dim); }
.explain-label.demo { color: var(--amber); }
.explain-label.live { color: var(--green); }
.explain-label.fallback, .explain-label.error { color: var(--red); }
.explain-label.busy { color: var(--amber); }
.explain-text { white-space: pre-wrap; color: var(--white); line-height: 1.5; }
.explain-note { margin: 8px 0 0; font-size: 11px; color: var(--amber-dim); }

/* --- Smaller screens: stack the panels ---------------------------------- */
@media (max-width: 1100px) {
  body { height: auto; }
  .grid {
    flex: none;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto 360px 260px 200px auto 360px;
    grid-template-areas: "controls" "price" "equity" "drawdown" "metrics" "trades";
  }
}

/* --- 404 / 500 pages -------------------------------------------------------- */
body.error-page { display: grid; place-items: center; }
body.error-page main { max-width: 520px; padding: 24px; border: 1px solid var(--line); }
body.error-page h1 { font-size: 16px; letter-spacing: 0.1em; color: var(--red); }
body.error-page a { color: var(--cyan); }