:root {
  --bg: #f4f5f7; --card: #ffffff; --text: #16191d; --muted: #5d6673; --line: #dfe3e8;
  --good: #0a7d43; --good-bg: #e3f5eb; --bad: #bf1f2d; --bad-bg: #fbe6e8;
  --warn: #8f5a00; --warn-bg: #fdf1d8; --accent: #1f5fbf; --track: #e7eaee;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216; --card: #191d23; --text: #eef1f4; --muted: #9aa5b1; --line: #2c333b;
    --good: #3ecf8a; --good-bg: #123325; --bad: #ff7a85; --bad-bg: #3a1a1e;
    --warn: #f0b95b; --warn-bg: #33270f; --accent: #6ea6ff; --track: #2a3038;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1216; --card: #191d23; --text: #eef1f4; --muted: #9aa5b1; --line: #2c333b;
  --good: #3ecf8a; --good-bg: #123325; --bad: #ff7a85; --bad-bg: #3a1a1e;
  --warn: #f0b95b; --warn-bg: #33270f; --accent: #6ea6ff; --track: #2a3038;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-variant-numeric: tabular-nums;
}
main { max-width: 1120px; margin: 0 auto; padding: 16px; display: flex; flex-direction: column; gap: 14px; }
h1 { margin: 0 0 12px; font-size: 22px; }
h2 { margin: 0 0 10px; font-size: 13px; font-weight: 650; letter-spacing: .03em; color: var(--muted); text-transform: uppercase; }
small { display: block; color: var(--muted); font-size: 12.5px; font-weight: 400; }
.muted { color: var(--muted); }
.bad { color: var(--bad); }
.good { color: var(--good); }
p { margin: 6px 0; }

.card, .control { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; min-width: 0; }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 14px; }

.sim-note { background: var(--warn-bg); color: var(--warn); padding: 8px 14px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.banner { background: var(--bad); color: #fff; padding: 12px 16px; border-radius: 10px; font-weight: 600; }

.control { display: grid; grid-template-columns: 1fr auto; gap: 14px 24px; align-items: center; border-width: 2px; }
.control.is-running { border-color: var(--good); }
.control.is-live { border-color: var(--bad); }
.state { display: flex; align-items: center; gap: 12px; }
.dot { width: 16px; height: 16px; border-radius: 50%; background: var(--muted); flex: none; }
.is-running .dot { background: var(--good); }
.is-live .dot { background: var(--bad); }
.state-title { font-size: 24px; font-weight: 700; line-height: 1.15; }
.state-sub { color: var(--muted); }
.control-buttons { display: flex; gap: 10px; }
.mode-row { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: center; gap: 12px; border-top: 1px solid var(--line); padding-top: 12px; }
.mode-row .danger-outline { margin-left: auto; }
.label { color: var(--muted); font-size: 13px; }

.btn {
  font: inherit; font-weight: 600; padding: 9px 14px; border-radius: 8px; cursor: pointer;
  background: var(--card); color: var(--text); border: 1px solid var(--line); min-height: 40px;
}
.btn:hover:not(:disabled) { filter: brightness(.96); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn:focus-visible, .segment button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn.big { font-size: 18px; font-weight: 700; padding: 14px 30px; min-width: 150px; min-height: 58px; border: 0; color: #fff; }
.btn.start { background: #0a7d43; }
.btn.stop { background: #bf1f2d; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
:root[data-theme="dark"] .btn.primary { color: #0f1216; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn.primary { color: #0f1216; } }
.btn.danger-outline { color: var(--bad); border-color: var(--bad); }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 4px; }

.segment { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.segment button { font: inherit; font-weight: 600; background: transparent; color: var(--muted); border: 0; padding: 8px 14px; cursor: pointer; min-height: 40px; }
.segment button + button { border-left: 1px solid var(--line); }
.segment button.on { background: var(--accent); color: #fff; }
.segment button#mode-live.on { background: #bf1f2d; color: #fff; }
.segment button:disabled { cursor: not-allowed; }

.timer { font-size: 38px; font-weight: 700; line-height: 1; margin-bottom: 12px; }
.timer small { display: inline; margin-left: 6px; font-size: 14px; }
.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; margin: 0; }
.facts dt { color: var(--muted); font-size: 12.5px; }
.facts dd { margin: 0; font-weight: 600; font-size: 16px; }

.checks { list-style: none; margin: 0; padding: 0; }
.checks li { display: flex; gap: 10px; padding: 8px 0; border-top: 1px solid var(--line); }
.checks li:first-child { border-top: 0; }
.checks .mark { flex: none; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.checks .pass .mark { background: var(--good-bg); color: var(--good); }
.checks .fail .mark { background: var(--bad-bg); color: var(--bad); }
.checks b { display: block; font-weight: 600; }
.checks span.detail { color: var(--muted); font-size: 13px; }

.meter-row { margin-bottom: 12px; }
.meter-head { display: flex; justify-content: space-between; font-weight: 600; margin-bottom: 4px; }
.meter { height: 10px; background: var(--track); border-radius: 5px; overflow: hidden; }
.meter span { display: block; height: 100%; width: 0; background: var(--warn); transition: width .3s; }
.meter span.full { background: var(--bad); }

.position-main { font-size: 20px; font-weight: 700; }
.pill { display: inline-block; font-size: 12.5px; font-weight: 650; padding: 2px 8px; border-radius: 10px; background: var(--warn-bg); color: var(--warn); }

fieldset { border: 0; border-top: 1px solid var(--line); margin: 0; padding: 14px 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px 18px; }
legend { font-weight: 650; padding: 0 8px 0 0; }
#settings label { font-weight: 600; font-size: 14px; }
input[type=number], input[type=email], input[type=password], select {
  display: block; width: 100%; margin-top: 4px; font: inherit; font-weight: 400; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 7px; padding: 8px 10px; min-height: 40px;
}
input.changed, select.changed { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
#settings label.toggle { grid-column: 1 / -1; display: flex; gap: 10px; align-items: center; font-weight: 500; min-height: 28px; }
.toggle input { width: 18px; height: 18px; accent-color: var(--accent); }
.form-actions { display: flex; gap: 10px; justify-content: flex-start; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; color: var(--muted); font-size: 12px; font-weight: 600; white-space: nowrap; padding: 6px 10px; border-bottom: 1px solid var(--line); }
td { padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.num { text-align: right; }

.log { list-style: none; margin: 0; padding: 0; max-height: 280px; overflow-y: auto; font-size: 13.5px; }
.log li { padding: 5px 0; border-top: 1px solid var(--line); display: flex; gap: 10px; }
.log li:first-child { border-top: 0; }
.log time { color: var(--muted); flex: none; }
.log .warn { color: var(--warn); }
.log .error { color: var(--bad); font-weight: 600; }
.log .trade { font-weight: 600; }

footer { display: flex; justify-content: space-between; font-size: 13px; padding: 0 4px 16px; }

.login { max-width: 340px; margin: 12vh auto; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 24px; display: flex; flex-direction: column; gap: 12px; }

dialog { background: var(--card); color: var(--text); border: 1px solid var(--line); border-radius: 12px; max-width: 420px; width: calc(100% - 32px); padding: 22px; }
dialog h2 { font-size: 19px; color: var(--text); text-transform: none; letter-spacing: 0; }
dialog::backdrop { background: rgba(0,0,0,.5); }

@media (max-width: 640px) {
  .control { grid-template-columns: 1fr; }
  .control-buttons .btn { flex: 1; min-width: 0; padding: 14px 8px; }
  .mode-row .danger-outline { margin-left: 0; width: 100%; }
  .segment { flex: 1; }
  .segment button { flex: 1; padding: 8px 6px; }
}