:root {
  color-scheme: dark;
  --bg: #131722;
  --bg-deep: #0f1118;
  --surface: #1e222d;
  --surface-raised: #242936;
  --surface-soft: #191d28;
  --input: #161a24;
  --line: #2a2e39;
  --line-strong: #3a404d;
  --text: #f0f3fa;
  --muted: #9aa2b1;
  --faint: #687080;
  --accent: #26a69a;
  --accent-bright: #42c8b8;
  --blue: #2962ff;
  --orange: #f5a623;
  --purple: #9b87f5;
  --danger: #ef5350;
  --danger-soft: #3a232a;
  --shadow: 0 18px 50px rgba(0, 0, 0, .18);
  --radius: 4px;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--bg-deep); }

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(rgba(255, 255, 255, .018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .018) 1px, transparent 1px),
    radial-gradient(circle at 78% -15%, rgba(41, 98, 255, .13), transparent 32rem),
    var(--bg);
  background-size: 64px 64px, 64px 64px, auto, auto;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { opacity: .52; cursor: wait; }
[hidden] { display: none !important; }

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

.app-shell { min-height: 100vh; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 58px;
  padding: 0 max(18px, 4vw);
  border-bottom: 1px solid var(--line);
  background: rgba(19, 23, 34, .94);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .02);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  color: var(--accent-bright);
  font-family: Georgia, serif;
  font-size: 18px;
  box-shadow: 0 0 18px rgba(38, 166, 154, .16);
}

.beta {
  padding: 2px 6px;
  border: 1px solid rgba(245, 166, 35, .42);
  border-radius: 3px;
  color: var(--orange);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 11px;
}

.topbar-actions > span:first-child::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 9px rgba(38, 166, 154, .7);
  content: '';
}

.ghost-button,
.text-button {
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--muted);
  background: transparent;
  font-size: 11px;
}

.ghost-button:hover,
.text-button:hover {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(38, 166, 154, .08);
}

.page {
  width: min(1440px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 26px;
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  padding: 42px 0 30px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.section-kicker,
.contract-label,
.note-label {
  margin: 0;
  color: var(--accent-bright);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 780px;
  margin: 11px 0 12px;
  color: var(--text);
  font-size: clamp(34px, 4vw, 58px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.055em;
}

.hero h1 em { color: var(--accent-bright); font-style: normal; }
.hero-copy { max-width: 700px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }

.hero-note {
  display: grid;
  flex: 0 0 240px;
  gap: 7px;
  padding: 14px 0 14px 17px;
  border-left: 2px solid var(--orange);
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
}

.hero-note strong { color: var(--text); font-size: 12px; }

.control-panel {
  display: grid;
  grid-template-columns: minmax(130px, 1.1fr) minmax(145px, 1.1fr) minmax(115px, .8fr) minmax(145px, .9fr) minmax(150px, 1fr) auto;
  gap: 9px;
  align-items: end;
  margin-top: 18px;
  padding: 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(30, 34, 45, .94);
  box-shadow: var(--shadow);
}

.control-group { display: grid; min-width: 0; gap: 5px; }
.control-group label, .settings-grid label, .metric-tabs label, .strategy-controls label, .portfolio-controls label, .arb-settings label { color: var(--muted); font-size: 10px; font-weight: 500; letter-spacing: .02em; }

input, select {
  min-width: 0;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--input);
  outline: none;
}

input:hover, select:hover { border-color: #525a69; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(38, 166, 154, .16); }
.control-group input, .control-group select { width: 100%; padding: 9px 10px; }
.segmented { flex: 0 0 auto; }
.segmented > div { display: flex; }

.segment { width: 50%; padding: 9px 12px; border: 1px solid var(--line-strong); color: var(--muted); background: var(--input); font-family: var(--mono); font-size: 11px; }
.segment:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.segment:last-child { border-left: 0; border-radius: 0 var(--radius) var(--radius) 0; }
.segment:hover { color: var(--text); }
.segment.active { border-color: var(--accent); color: #071512; background: var(--accent); font-weight: 700; }

.primary-button { min-height: 37px; padding: 9px 15px; border: 1px solid var(--accent); border-radius: var(--radius); color: #071512; background: var(--accent); font-weight: 700; white-space: nowrap; }
.primary-button:hover { border-color: var(--accent-bright); background: var(--accent-bright); }

.model-settings { margin: 10px 0 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--muted); background: rgba(25, 29, 40, .8); font-size: 11px; line-height: 1.7; }
.model-settings summary { cursor: pointer; color: var(--text); }
.model-settings summary::marker { color: var(--accent); }
.model-settings p { max-width: 980px; margin: 11px 0 0; }
.settings-grid { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }
.settings-grid label { display: grid; gap: 5px; }
.settings-grid input { width: 170px; padding: 8px 9px; }

.error-panel { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-top: 12px; padding: 13px 15px; border: 1px solid rgba(239, 83, 80, .55); border-left: 3px solid var(--danger); border-radius: var(--radius); background: rgba(58, 35, 42, .72); }
.error-panel strong, .error-panel p { display: block; margin: 0; }
.error-panel strong { color: #ffb1aa; font-size: 12px; }
.error-panel p { margin-top: 4px; color: #d5a7aa; font-size: 11px; line-height: 1.6; overflow-wrap: anywhere; }
.retry-button { flex: 0 0 auto; padding: 7px 11px; border: 1px solid rgba(239, 83, 80, .7); border-radius: var(--radius); color: #ffb1aa; background: transparent; font-size: 11px; }
.retry-button:hover { background: rgba(239, 83, 80, .12); }

.contract-strip { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 24px 0 12px; }
.contract-strip strong { display: block; margin-top: 5px; color: var(--text); font-size: 16px; font-weight: 600; letter-spacing: -.02em; }
.strip-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 11px; }
.pill { padding: 5px 8px; border: 1px solid var(--line-strong); border-radius: 3px; color: var(--muted); font-size: 10px; }
.pill.green { border-color: rgba(38, 166, 154, .5); color: var(--accent-bright); }

.quote-strip { display: flex; align-items: center; flex-wrap: wrap; gap: 0; margin-bottom: 12px; padding: 0; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.quote-strip > div { min-width: 112px; padding: 13px 16px; border-right: 1px solid var(--line); }
.quote-strip div span, .strategy-metrics span { display: block; margin-bottom: 5px; color: var(--muted); font-size: 10px; }
.quote-strip strong { color: var(--text); font-family: var(--mono); font-size: 17px; font-variant-numeric: tabular-nums; }
.quote-strip strong small { color: var(--muted); font-family: var(--sans); font-size: 10px; }
.quote-strip p { flex: 1; min-width: 260px; margin: 0; padding: 12px 16px; color: var(--muted); font-size: 10px; line-height: 1.65; overflow-wrap: anywhere; }

.decision-grid { display: grid; grid-template-columns: 1fr 1fr 1.12fr; gap: 10px; margin-bottom: 12px; }
.decision-card, .card, .kpi-card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.decision-card { min-height: 164px; padding: 15px 16px; box-shadow: 0 4px 18px rgba(0, 0, 0, .08); }
.decision-price { border-top: 2px solid var(--accent); }
.decision-iv { border-top: 2px solid var(--orange); }
.decision-arb { border-top: 2px solid var(--purple); }
.decision-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin: 14px 0 13px; }
.decision-heading strong { color: var(--text); font-family: var(--mono); font-size: 24px; font-variant-numeric: tabular-nums; font-weight: 500; }
.decision-heading span { color: var(--muted); font-size: 11px; }
.range-track { position: relative; height: 7px; margin: 15px 2px 9px; border-radius: 1px; background: linear-gradient(90deg, #277f72 0%, #8b7945 52%, #8b4147 100%); }
.range-track span { position: absolute; top: -5px; width: 3px; height: 17px; border-radius: 1px; background: #fff; box-shadow: 0 0 0 2px rgba(255, 255, 255, .22); transform: translateX(-50%); }
.iv-track { background: linear-gradient(90deg, #3c6588 0%, #8b7945 52%, #8b4147 100%); }
.range-meta { display: flex; justify-content: space-between; color: var(--muted); font-family: var(--mono); font-size: 9px; }
.decision-card p { min-height: 36px; margin: 12px 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }
.scan-button { padding: 6px 9px; border: 1px solid rgba(155, 135, 245, .5); border-radius: var(--radius); color: var(--purple); background: transparent; font-size: 10px; white-space: nowrap; }
.scan-button:hover { border-color: var(--purple); color: var(--text); background: rgba(155, 135, 245, .1); }
.arb-signal { margin-top: 11px; color: var(--muted); font-family: var(--mono); font-size: 10px; line-height: 1.6; }
.arb-signal.has-opportunity { color: var(--accent-bright); }

.workspace-grid, .bottom-grid { display: grid; grid-template-columns: minmax(0, 1.72fr) minmax(310px, .88fr); gap: 12px; }
.bottom-grid { margin-top: 12px; margin-bottom: 26px; }
.chart-card, .drivers-card, .table-card, .import-card, .strategy-card, .portfolio-card, .arbitrage-card { padding: 18px; }
.card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.card-header h2 { margin: 5px 0 0; color: var(--text); font-size: 16px; font-weight: 600; letter-spacing: -.02em; }
.chart-controls { display: flex; gap: 2px; }
.range-button { padding: 5px 8px; border: 0; border-bottom: 2px solid transparent; color: var(--muted); background: transparent; font-family: var(--mono); font-size: 10px; }
.range-button:hover { color: var(--text); }
.range-button.active { border-bottom-color: var(--accent); color: var(--accent-bright); }
.metric-tabs { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-top: 17px; color: var(--muted); font-size: 11px; }
.metric-tabs select, .strategy-controls select { padding: 7px 9px; }
.metric-tabs > span { margin-left: auto; color: var(--faint); font-family: var(--mono); font-size: 10px; }
.legend { display: flex; align-items: center; min-height: 23px; gap: 14px; margin-top: 6px; color: var(--muted); font-size: 10px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 8px; height: 8px; border-radius: 50%; }
.chart-wrap { position: relative; width: 100%; height: 318px; margin-top: 3px; background: linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px), #1a1e28; background-size: 100% 48px, 82px 100%, auto; border: 1px solid var(--line); }
.chart-wrap canvas { display: block; }
.chart-tooltip { position: absolute; z-index: 2; display: none; width: 214px; padding: 8px 10px; border: 1px solid var(--line-strong); border-radius: var(--radius); color: var(--muted); background: rgba(15, 17, 24, .96); box-shadow: 0 9px 24px rgba(0, 0, 0, .35); font-size: 10px; line-height: 1.65; pointer-events: none; }
.chart-tooltip b { color: var(--text); font-family: var(--mono); font-weight: 500; }
.chart-tooltip.visible { display: block; }
.chart-note { margin: 10px 0 0; color: var(--muted); font-size: 10px; line-height: 1.65; }
.date-badge { padding: 5px 7px; border: 1px solid rgba(245, 166, 35, .42); border-radius: 3px; color: var(--orange); font-family: var(--mono); font-size: 10px; }
.driver-total { display: flex; align-items: baseline; justify-content: space-between; padding: 23px 0 14px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.driver-total strong { color: var(--text); font-family: var(--mono); font-size: 22px; font-weight: 500; }
.driver-row { margin-top: 16px; }
.driver-label { display: flex; justify-content: space-between; gap: 8px; font-size: 11px; }
.driver-label span { color: var(--muted); }
.driver-label b { font-family: var(--mono); font-size: 11px; font-weight: 500; }
.driver-track { height: 5px; margin-top: 7px; overflow: hidden; border-radius: 1px; background: #303641; }
.driver-bar { display: block; height: 100%; min-width: 1px; border-radius: 1px; }
.bar-positive { background: var(--accent); }
.bar-negative { background: var(--danger); }
.formula-box { margin-top: 21px; padding: 12px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--muted); background: var(--surface-soft); font-size: 10px; }
.formula-box span { display: block; margin-bottom: 7px; color: var(--orange); }
.formula-box code { color: #c7cdd8; font-family: var(--mono); font-size: 10px; line-height: 1.8; }
.formula-box p { margin: 8px 0 0; line-height: 1.6; }

.kpi-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 9px; margin-top: 12px; }
.kpi-card { min-height: 98px; padding: 13px 14px; border-top: 2px solid var(--line-strong); }
.kpi-card:nth-child(1) { border-top-color: var(--purple); }
.kpi-card:nth-child(2) { border-top-color: var(--blue); }
.kpi-card:nth-child(3) { border-top-color: var(--orange); }
.kpi-card:nth-child(4) { border-top-color: var(--danger); }
.kpi-card:nth-child(5), .kpi-card:nth-child(6) { border-top-color: var(--accent); }
.kpi-card span { display: block; color: var(--muted); font-size: 10px; }
.kpi-card strong { display: block; margin-top: 8px; color: var(--text); font-family: var(--mono); font-size: 20px; font-variant-numeric: tabular-nums; font-weight: 500; }
.kpi-card small { display: block; margin-top: 5px; color: var(--faint); font-size: 9px; line-height: 1.45; }
.positive { color: var(--accent-bright) !important; }
.negative { color: var(--danger) !important; }

.strategy-card, .portfolio-card, .arbitrage-card { margin-top: 12px; }
.strategy-controls, .portfolio-controls { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 9px; margin-top: 17px; color: var(--muted); font-size: 11px; }
.strategy-controls label, .portfolio-controls label { display: grid; gap: 5px; }
.strategy-controls select { min-width: 190px; }
.portfolio-controls select { width: 92px; padding: 7px 9px; }
.portfolio-controls input { width: 110px; padding: 7px 9px; }
.portfolio-controls input:nth-of-type(2) { width: 130px; }
.strategy-controls select, .portfolio-controls select, .portfolio-controls input { background: var(--input); }
.strategy-controls .primary-button, .portfolio-controls .primary-button { margin-left: auto; }
.strategy-title { margin: 18px 0 12px; color: var(--text); font-size: 12px; font-weight: 600; }
.strategy-metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 9px; }
.strategy-metrics > div { padding: 12px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-soft); }
.strategy-metrics strong { color: var(--text); font-family: var(--mono); font-size: 19px; font-variant-numeric: tabular-nums; font-weight: 500; }
.strategy-legs { margin-top: 14px; }
.strategy-legs small { display: block; margin: 4px 0 9px; color: var(--muted); font-size: 9px; line-height: 1.5; }
.payoff-wrap { margin-top: 14px; }
.payoff-wrap canvas { display: block; width: 100%; height: auto; border: 1px solid var(--line); background: #1a1e28; }
.scenario-label { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin: 11px 0; color: var(--muted); font-size: 11px; }
.scenario-label strong { color: var(--text); font-family: var(--mono); }
.scenario-label span { margin-left: auto; font-family: var(--mono); font-size: 15px; }
#scenarioInput { width: 100%; accent-color: var(--accent); }

.arb-explain { margin: 14px 0 0; color: var(--muted); font-size: 10px; line-height: 1.7; }
.arbitrage-card { padding-bottom: 8px; }
.arb-settings { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; color: var(--muted); font-size: 10px; }
.arb-settings input { width: 68px; padding: 6px 7px; font-family: var(--mono); font-size: 11px; }
.arb-table-wrap { margin-top: 12px; overflow-x: auto; }
.arb-table { min-width: 860px; }
.arb-table td { min-width: 105px; vertical-align: top; line-height: 1.5; }
.arb-table td:nth-child(3) { min-width: 270px; }
.arb-table td strong, .arb-table td small { display: block; }
.arb-table td small { margin-top: 3px; color: var(--muted); font-size: 9px; line-height: 1.55; }
.leg-chip { display: inline-block; margin: 0 4px 4px 0; padding: 3px 5px; border-radius: 2px; font-family: var(--mono); font-size: 9px; }
.leg-chip.buy { color: var(--accent-bright); background: rgba(38, 166, 154, .16); }
.leg-chip.sell { color: #ff8b86; background: rgba(239, 83, 80, .15); }
.candidate-label { display: inline-block; padding: 3px 5px; border: 1px solid rgba(245, 166, 35, .5); border-radius: 2px; color: var(--orange); font-size: 9px; }

.table-scroll { margin-top: 14px; overflow-x: auto; }
table { width: 100%; min-width: 700px; border-collapse: collapse; }
th { padding: 9px 10px; border-bottom: 1px solid var(--line-strong); color: var(--muted); font-size: 10px; font-weight: 500; text-align: left; white-space: nowrap; }
td { padding: 10px; border-bottom: 1px solid var(--line); color: #d1d6e0; font-size: 10px; white-space: nowrap; }
tbody tr:hover { background: rgba(255, 255, 255, .025); }
tr:last-child td { border-bottom: 0; }
.mono { font-family: var(--mono); }
.strong-cell { color: var(--text); }
.empty-table { padding: 32px 10px; color: var(--muted); text-align: center; white-space: normal; }
.empty-state { padding: 27px 0; color: var(--muted); font-size: 11px; line-height: 1.7; }

.import-card p { margin: 12px 0 0; color: var(--muted); font-size: 10px; line-height: 1.7; overflow-wrap: anywhere; }
.api-icon { padding: 4px 6px; border: 1px solid rgba(245, 166, 35, .45); border-radius: 3px; color: var(--orange); font-family: var(--mono); font-size: 9px; }
.provider-box { display: grid; gap: 7px; margin-top: 14px; }
.provider-box > div { display: flex; align-items: center; gap: 9px; padding: 9px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-soft); }
.provider-box strong, .provider-box small { display: block; }
.provider-box strong { font-size: 10px; }
.provider-box small { margin-top: 3px; color: var(--muted); font-size: 9px; }
.provider-state { margin-left: auto; color: var(--accent-bright); font-family: var(--mono); font-size: 9px; }
.provider-state.fallback { color: var(--orange); }
.provider-logo { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 3px; font-weight: 800; }
.provider-logo.yahoo { color: #fff; background: #6e42c1; }
.provider-logo.nasdaq { color: #fff; background: #2169d1; }
.import-message { min-height: 15px; margin-top: 12px; color: var(--accent-bright); font-size: 10px; overflow-wrap: anywhere; }

.portfolio-controls { margin-bottom: 0; }
.portfolio-message { min-height: 16px; margin: 12px 0 0; color: var(--muted); font-size: 10px; }
.portfolio-metrics { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; margin-top: 13px; }
.portfolio-metrics > div { min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-soft); }
.portfolio-metrics span { display: block; color: var(--muted); font-size: 9px; }
.portfolio-metrics strong { display: block; margin-top: 6px; color: var(--text); font-family: var(--mono); font-size: 16px; font-variant-numeric: tabular-nums; font-weight: 500; overflow-wrap: anywhere; }
.portfolio-note { display: block; margin-top: 9px; color: var(--muted); font-size: 9px; line-height: 1.6; }
.portfolio-table { min-width: 740px; }
.remove-position { padding: 4px 7px; border: 1px solid var(--line-strong); border-radius: 3px; color: var(--muted); background: transparent; font-size: 10px; }
.remove-position:hover { border-color: var(--danger); color: #ff8b86; }

footer { display: flex; justify-content: space-between; gap: 20px; width: min(1440px, calc(100% - 40px)); margin: 0 auto; padding: 17px 0 26px; border-top: 1px solid var(--line); color: var(--faint); font-size: 10px; }

@media (max-width: 1100px) {
  .control-panel { grid-template-columns: repeat(3, 1fr); }
  .control-panel .primary-button { grid-column: span 3; }
  .kpi-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .portfolio-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .page { width: min(100% - 28px, 760px); }
  .hero { display: block; padding: 31px 0 23px; }
  .hero-note { max-width: 360px; margin-top: 20px; }
  .workspace-grid, .bottom-grid { grid-template-columns: 1fr; }
  .decision-grid { grid-template-columns: 1fr 1fr; }
  .decision-arb { grid-column: span 2; }
  .strategy-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chart-wrap { height: 290px; }
}

@media (max-width: 620px) {
  .topbar { padding: 0 14px; }
  .topbar-actions > span:first-child { display: none; }
  .page { width: calc(100% - 20px); }
  .hero h1 { font-size: 31px; }
  .hero-copy { font-size: 12px; }
  .hero-note { display: none; }
  .control-panel { grid-template-columns: 1fr 1fr; padding: 10px; }
  .control-panel .primary-button { grid-column: span 2; }
  .control-group { min-width: 0; }
  .contract-strip { display: block; padding-top: 18px; }
  .strip-meta { margin-top: 11px; }
  .quote-strip { display: grid; grid-template-columns: 1fr 1fr; }
  .quote-strip > div { min-width: 0; padding: 10px 12px; }
  .quote-strip > div:nth-child(2n) { border-right: 0; }
  .quote-strip p { grid-column: span 2; min-width: 0; border-top: 1px solid var(--line); padding: 10px 12px; }
  .decision-grid { grid-template-columns: 1fr; }
  .decision-arb { grid-column: auto; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .chart-card, .drivers-card, .table-card, .import-card, .strategy-card, .portfolio-card, .arbitrage-card { padding: 14px; }
  .chart-wrap { height: 255px; }
  .metric-tabs > span { width: 100%; margin-left: 0; }
  .strategy-controls, .portfolio-controls { align-items: stretch; }
  .strategy-controls label, .strategy-controls select, .portfolio-controls label, .portfolio-controls select, .portfolio-controls input { width: 100%; }
  .strategy-controls .primary-button, .portfolio-controls .primary-button { width: 100%; margin-left: 0; }
  .portfolio-metrics { grid-template-columns: 1fr 1fr; }
  .arb-settings { width: 100%; }
  .card-header { flex-wrap: wrap; }
  .error-panel { flex-direction: column; }
  footer { display: block; width: calc(100% - 20px); line-height: 1.9; }
}

/* Readability pass: keep the terminal density while making Chinese labels and values easier to scan. */
body { font-size: 15px; }
.topbar-actions { font-size: 13px; }
.hero-copy { font-size: 16px; }
.hero-note { font-size: 13px; }
.hero-note strong { font-size: 14px; }
.control-group label, .settings-grid label, .metric-tabs label, .strategy-controls label, .portfolio-controls label, .arb-settings label { font-size: 13px; }
.control-group input, .control-group select { padding: 11px 12px; font-size: 15px; }
.segment { padding: 11px 12px; font-size: 14px; }
.primary-button { min-height: 43px; font-size: 15px; }
.model-settings { font-size: 14px; }
.settings-grid input { padding: 10px; font-size: 14px; }
.field-status { display: block; min-height: 18px; margin-top: 4px; color: var(--muted); font-size: 12px; line-height: 1.4; }
.field-status.is-error { color: #ff9f99; }
.expiration-picker { display: flex; min-width: 0; gap: 6px; }
.expiration-picker select { flex: 1; min-width: 0; }
.secondary-button { width: 42px; padding: 0; border: 1px solid var(--line-strong); border-radius: var(--radius); color: var(--muted); background: var(--input); font-size: 20px; line-height: 1; }
.secondary-button:hover { border-color: var(--accent); color: var(--accent-bright); }
.contract-strip strong { font-size: 19px; }
.strip-meta { font-size: 13px; }
.quote-strip div span, .strategy-metrics span { font-size: 12px; }
.quote-strip strong { font-size: 22px; }
.quote-strip strong small { font-size: 12px; }
.quote-strip p { font-size: 12px; }
.section-kicker, .eyebrow, .contract-label, .note-label { font-size: 12px; }
.decision-heading strong { font-size: 30px; }
.decision-heading span { font-size: 14px; }
.decision-card p { font-size: 13px; }
.scan-button { padding: 8px 10px; font-size: 13px; }
.arb-signal { font-size: 12px; }
.card-header h2 { font-size: 19px; }
.range-button { padding: 6px 9px; font-size: 12px; }
.metric-tabs { font-size: 13px; }
.metric-tabs select, .strategy-controls select { font-size: 14px; }
.metric-tabs > span { font-size: 12px; }
.legend { font-size: 12px; }
.chart-tooltip { font-size: 12px; }
.chart-note { font-size: 12px; }
.date-badge { font-size: 12px; }
.driver-total { font-size: 14px; }
.driver-total strong { font-size: 26px; }
.driver-label { font-size: 14px; }
.driver-label b { font-size: 13px; }
.formula-box { font-size: 12px; }
.formula-box code { font-size: 12px; }
.kpi-card span { font-size: 13px; }
.kpi-card strong { font-size: 25px; }
.kpi-card small { font-size: 12px; }
.strategy-controls, .portfolio-controls { font-size: 14px; }
.strategy-title { font-size: 15px; }
.strategy-metrics strong { font-size: 23px; }
.strategy-legs small { font-size: 12px; }
.arb-explain { font-size: 13px; }
.arb-settings { font-size: 13px; }
.arb-table td, th { font-size: 12px; }
.arb-table td small { font-size: 11px; }
.leg-chip { font-size: 11px; }
.candidate-label { font-size: 11px; }
th { padding: 11px 10px; }
td { padding: 12px 10px; font-size: 12px; }
.empty-table, .empty-state { font-size: 13px; }
.import-card p { font-size: 12px; }
.provider-box strong { font-size: 12px; }
.provider-box small { font-size: 11px; }
.import-message { font-size: 12px; }
.portfolio-message { font-size: 12px; }
.portfolio-metrics span { font-size: 11px; }
.portfolio-metrics strong { font-size: 20px; }
.portfolio-note { font-size: 11px; }
.remove-position { font-size: 12px; }
footer { font-size: 12px; }

@media (max-width: 620px) {
  .hero-copy { font-size: 14px; }
  .hero h1 { font-size: 34px; }
  .topbar-actions { font-size: 12px; }
  .control-group label, .settings-grid label, .metric-tabs label, .strategy-controls label, .portfolio-controls label, .arb-settings label { font-size: 12px; }
  .control-group input, .control-group select { font-size: 14px; }
  .decision-heading strong { font-size: 28px; }
  .quote-strip strong { font-size: 20px; }
  .card-header h2 { font-size: 18px; }
  .kpi-card strong { font-size: 22px; }
  .strategy-metrics strong { font-size: 21px; }
  .portfolio-metrics strong { font-size: 18px; }
}

/* Unified control layout: every field has the same label, control and helper rows. */
.control-panel {
  grid-template-columns: minmax(150px, 1.08fr) minmax(205px, 1.28fr) minmax(135px, .78fr) minmax(175px, 1fr) minmax(180px, 1.06fr) minmax(150px, .82fr);
  align-items: stretch;
  gap: 12px;
  padding: 16px;
}
.control-group,
.control-action {
  min-width: 0;
  min-height: 100px;
  grid-template-rows: 24px 48px 22px;
  align-content: start;
  gap: 5px;
}
.control-group label,
.control-action-label {
  display: block;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  line-height: 24px;
}
.control-group input,
.control-group select,
.expiration-picker,
.segmented > div,
.control-action .primary-button {
  height: 48px;
}
.control-group input,
.control-group select {
  padding: 11px 13px;
  font-size: 16px;
}
.expiration-picker { gap: 8px; }
.secondary-button {
  width: 70px;
  min-width: 70px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
}
.segmented > div { display: flex; }
.segment {
  height: 48px;
  padding: 11px 12px;
  font-size: 15px;
}
.field-status {
  min-height: 22px;
  margin-top: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 22px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.field-status.is-error { color: #ff9f99; }
.control-action { display: grid; }
.control-action-label { color: var(--muted); }
.control-action .primary-button {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  border-radius: 6px;
  font-size: 15px;
}
.control-action .field-status { text-align: center; }

/* Larger reading scale for the research data itself. */
body { font-size: 16px; }
.topbar-actions { font-size: 14px; }
.hero-copy { font-size: 17px; }
.hero-note { font-size: 14px; }
.hero-note strong { font-size: 15px; }
.section-kicker, .eyebrow, .contract-label, .note-label { font-size: 13px; }
.contract-strip strong { font-size: 20px; }
.strip-meta { font-size: 14px; }
.card-header h2 { font-size: 20px; }
.quote-strip div span, .strategy-metrics span { font-size: 13px; }
.quote-strip strong { font-size: 24px; }
.quote-strip p { font-size: 13px; }
.decision-heading strong { font-size: 31px; }
.decision-heading span, .decision-card p { font-size: 14px; }
.range-meta { font-size: 11px; }
.arb-signal, .chart-note, .formula-box { font-size: 13px; }
.metric-tabs, .legend { font-size: 14px; }
.metric-tabs select, .strategy-controls select { font-size: 15px; }
.chart-tooltip { font-size: 13px; }
.kpi-card span { font-size: 14px; }
.kpi-card strong { font-size: 27px; }
.kpi-card small { font-size: 13px; }
.strategy-controls, .portfolio-controls, .arb-settings { font-size: 15px; }
.strategy-title { font-size: 16px; }
.strategy-metrics strong { font-size: 24px; }
.strategy-legs small, .arb-explain { font-size: 13px; }
.arb-table td, th, td { font-size: 13px; }
.arb-table td small { font-size: 12px; }
.leg-chip, .candidate-label { font-size: 12px; }
.import-card p, .provider-box small, .import-message, .portfolio-message { font-size: 13px; }
.provider-box strong { font-size: 13px; }
.portfolio-metrics span { font-size: 12px; }
.portfolio-metrics strong { font-size: 21px; }
.portfolio-note, footer { font-size: 12px; }
.table-count { color: var(--muted); font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.table-actions { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.text-button { font-size: 13px; }

/* The complete historical series remains available without making the page endless. */
.history-table-scroll {
  height: clamp(360px, 68vh, 760px);
  max-height: 760px;
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 5px;
  scrollbar-color: var(--line-strong) var(--surface-soft);
}
.history-table-scroll table { min-width: 960px; }
.history-table-scroll thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface-raised);
  box-shadow: 0 1px 0 var(--line-strong);
}
.history-table-scroll tbody tr:first-child td { border-top: 0; }

@media (max-width: 1180px) {
  .control-panel { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .control-action { grid-column: span 3; }
}
@media (max-width: 860px) {
  .page { width: min(100% - 28px, 760px); }
  .control-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .control-action { grid-column: span 2; }
  .control-action .primary-button { width: 100%; }
  .history-table-scroll { height: 62vh; }
}
@media (max-width: 560px) {
  .topbar { height: 62px; padding: 0 14px; }
  .brand { font-size: 18px; }
  .topbar-actions { gap: 7px; }
  .topbar-actions .ghost-button { padding: 8px 9px; }
  .page { width: calc(100% - 20px); }
  .hero { padding: 30px 0 24px; }
  .hero h1 { font-size: clamp(32px, 10vw, 42px); }
  .hero-copy { font-size: 15px; }
  .control-panel { grid-template-columns: 1fr; gap: 11px; padding: 14px; }
  .control-action { grid-column: auto; }
  .control-group,
  .control-action { min-height: 99px; }
  .control-group label,
  .control-action-label { font-size: 15px; }
  .control-group input,
  .control-group select { font-size: 16px; }
  .field-status { font-size: 13px; }
  .decision-heading strong { font-size: 29px; }
  .quote-strip strong { font-size: 22px; }
  .card-header h2 { font-size: 19px; }
  .card-header { gap: 10px; }
  .table-actions { width: 100%; justify-content: space-between; }
  .history-table-scroll { height: 65vh; min-height: 350px; }
}