:root {
  color-scheme: dark;
  --bg: #081016;
  --surface: #0d171f;
  --surface-raised: #111e27;
  --surface-soft: #14232d;
  --border: #21343f;
  --border-strong: #31505e;
  --text: #edf6f4;
  --muted: #8fa5aa;
  --accent: #8ee6c3;
  --accent-strong: #5fc9a3;
  --cyan: #71cfe0;
  --warning: #f2c86f;
  --danger: #f28d8d;
  --radius: 14px;
  --shadow: 0 18px 45px rgb(0 0 0 / 18%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
}

.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgb(5 12 17 / 96%);
  backdrop-filter: blur(10px);
}

.auth-card {
  width: min(100%, 430px);
  padding: 34px;
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.auth-card .brand-mark { margin-bottom: 28px; }
.auth-card h1 { margin: 10px 0; font-size: 31px; letter-spacing: -.045em; }
.auth-card > p:not(.eyebrow) { margin: 0 0 24px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.auth-card form { display: grid; gap: 15px; }
.auth-card form button { margin-top: 5px; }
.auth-error { padding: 11px 13px; border: 1px solid #634349; border-radius: 8px; background: #26191d; color: #ffc5c5; font-size: 12px; line-height: 1.4; }
.text-button { width: 100%; margin-top: 12px; border: 0; background: transparent; color: var(--accent); font-size: 12px; }
.text-button:hover:not(:disabled) { background: transparent; text-decoration: underline; }

button, select, input { font: inherit; }

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--accent);
  color: #06100d;
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

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

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 10;
  display: flex;
  width: 238px;
  flex-direction: column;
  padding: 26px 18px;
  background: #0a141b;
  border-right: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px 28px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--accent-strong);
  border-radius: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}

.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: -.02em; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .1em; }

.nav-list { display: grid; gap: 4px; }

.nav-item {
  padding: 11px 13px;
  border: 1px solid transparent;
  border-radius: 9px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.nav-item:hover { color: var(--text); background: var(--surface); }
.nav-item.is-active { color: var(--accent); background: #10231f; border-color: #21443a; }

.safety-card {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  padding: 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.safety-card strong, .safety-card small { display: block; }
.safety-card strong { font-size: 13px; }
.safety-card small { margin-top: 3px; color: var(--muted); font-size: 11px; }

.status-dot { width: 9px; height: 9px; flex: 0 0 auto; border-radius: 50%; background: var(--warning); box-shadow: 0 0 0 4px rgb(242 200 111 / 10%); }
.status-dot.is-healthy, .status-safe { background: var(--accent); box-shadow: 0 0 0 4px rgb(142 230 195 / 10%); }
.status-dot.is-error { background: var(--danger); box-shadow: 0 0 0 4px rgb(242 141 141 / 10%); }

.main-content {
  width: calc(100% - 238px);
  margin-left: 238px;
  padding: 30px clamp(22px, 3.5vw, 56px) 54px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  margin-bottom: 28px;
}

.topbar h1 { margin: 4px 0 0; font-size: clamp(24px, 3vw, 34px); letter-spacing: -.04em; }
.eyebrow { margin: 0; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.user-label { max-width: 190px; overflow: hidden; color: var(--muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.logout-button { border-color: var(--border); background: transparent; color: var(--muted); }
.logout-button:hover:not(:disabled) { border-color: var(--border-strong); background: var(--surface-soft); color: var(--text); }

.mode-pill, .section-note {
  padding: 8px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

button {
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid var(--accent-strong);
  border-radius: 9px;
  background: var(--accent);
  color: #07120f;
  font-weight: 750;
  cursor: pointer;
}

button:hover:not(:disabled) { background: #a5eed2; }
button:focus-visible, a:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
button:disabled { border-color: var(--border); background: var(--surface-soft); color: #6d8186; cursor: not-allowed; }
.refresh-button.is-loading { opacity: .7; cursor: wait; }

.message { margin-bottom: 18px; padding: 13px 16px; border: 1px solid #634349; border-radius: 10px; background: #26191d; color: #ffc5c5; font-size: 13px; }
.is-hidden { display: none !important; }
.page { display: none; animation: page-in .2s ease-out; }
.page.is-active { display: block; }

@keyframes page-in { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.hero-panel {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  min-height: 220px;
  margin-bottom: 18px;
  padding: clamp(24px, 4vw, 46px);
  overflow: hidden;
  border: 1px solid #28463d;
  border-radius: var(--radius);
  background: #10241f;
  box-shadow: var(--shadow);
}

.hero-panel h2 { max-width: 680px; margin: 12px 0; font-size: clamp(34px, 5vw, 58px); line-height: 1.02; letter-spacing: -.055em; }
.hero-panel h2 span { color: var(--accent); }
.hero-panel p:last-child { max-width: 620px; margin: 0; color: #a9bfba; line-height: 1.55; }
.hero-status { display: flex; min-width: 210px; align-items: center; gap: 12px; padding: 15px; border: 1px solid #2c4d43; border-radius: 11px; background: rgb(5 16 13 / 46%); }
.hero-status strong, .hero-status small { display: block; }
.hero-status strong { font-size: 13px; }
.hero-status small { margin-top: 4px; color: #9bb0ab; font-size: 11px; }

.metrics-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 12px; }
.metric-card, .panel { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.metric-card { padding: 19px; }
.metric-card span, .metric-card small { color: var(--muted); }
.metric-card span { display: block; font-size: 12px; }
.metric-card strong { display: block; margin: 12px 0 6px; overflow: hidden; font-size: clamp(20px, 2.2vw, 28px); text-overflow: ellipsis; letter-spacing: -.035em; white-space: nowrap; }
.metric-card small { font-size: 11px; }
.positive { color: var(--accent) !important; }
.negative { color: var(--danger) !important; }

.monitoring-panel { margin-bottom: 12px; }
.monitoring-grid { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 1px; overflow: hidden; border: 1px solid var(--border); border-radius: 10px; background: var(--border); }
.monitoring-grid > div { min-width: 0; padding: 14px; background: var(--surface-raised); }
.monitoring-grid span, .monitoring-grid strong { display: block; }
.monitoring-grid span { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .07em; }
.monitoring-grid strong { margin-top: 8px; overflow: hidden; font-size: 15px; text-overflow: ellipsis; white-space: nowrap; }

.dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(300px, .8fr); gap: 12px; margin-bottom: 12px; }
.panel { padding: 21px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.panel-heading h2 { margin: 5px 0 0; font-size: 18px; letter-spacing: -.025em; }
.panel-heading a { color: var(--accent); font-size: 12px; text-decoration: none; }
.panel-heading a:hover { text-decoration: underline; }

.segmented { display: flex; gap: 3px; padding: 3px; border: 1px solid var(--border); border-radius: 8px; }
.segmented button { min-height: 29px; padding: 0 9px; border: 0; background: transparent; color: var(--muted); font-size: 11px; }
.segmented button.is-selected { background: var(--surface-soft); color: var(--accent); }

.chart-wrap { position: relative; min-height: 260px; }
.chart-wrap svg { display: block; width: 100%; height: 260px; overflow: visible; }
.chart-grid { stroke: #1e313b; stroke-width: 1; }
.chart-line { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.chart-area { fill: rgb(142 230 195 / 8%); stroke: none; }
.chart-empty { position: absolute; inset: 0; display: grid; place-items: center; color: var(--muted); font-size: 13px; }

.capability-list { display: grid; gap: 2px; }
.capability-item { display: grid; grid-template-columns: 9px 1fr auto; align-items: start; gap: 11px; padding: 13px 0; border-bottom: 1px solid var(--border); }
.capability-item:last-child { border-bottom: 0; }
.capability-item strong { display: block; font-size: 13px; }
.capability-item small { display: block; margin-top: 4px; color: var(--muted); font-size: 11px; line-height: 1.4; }
.capability-item em { color: var(--muted); font-size: 10px; font-style: normal; text-transform: uppercase; letter-spacing: .06em; }

.table-wrap { width: 100%; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 13px 11px; border-bottom: 1px solid var(--border); text-align: right; white-space: nowrap; }
th { color: var(--muted); font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
td { font-size: 13px; }
th:first-child, td:first-child { padding-left: 0; text-align: left; }
th:last-child, td:last-child { padding-right: 0; }
tbody tr:last-child td { border-bottom: 0; }
.symbol-cell strong, .symbol-cell small { display: block; }
.symbol-cell small { margin-top: 3px; color: var(--muted); font-size: 10px; }
.empty-cell { padding: 40px 0; color: var(--muted); text-align: center !important; }

.info-strip { display: flex; gap: 18px; margin-top: 12px; padding: 16px 19px; border: 1px solid var(--border); border-radius: 11px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.info-strip strong { flex: 0 0 auto; color: var(--text); }

.section-intro { max-width: 720px; margin: 20px 0 26px; }
.section-intro h2 { margin: 8px 0; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.05em; }
.section-intro p:last-child { color: var(--muted); line-height: 1.55; }
.empty-state { display: grid; min-height: 330px; place-items: center; align-content: center; padding: 40px 22px; border: 1px dashed var(--border-strong); border-radius: var(--radius); text-align: center; }
.empty-state h3 { margin: 14px 0 7px; font-size: 22px; }
.empty-state p { max-width: 570px; margin: 0 0 22px; color: var(--muted); line-height: 1.55; }
.empty-code { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 11px; letter-spacing: .12em; }

.form-panel { max-width: 880px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 17px; }
label { color: var(--muted); font-size: 12px; }
select, input { width: 100%; height: 44px; margin-top: 8px; padding: 0 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-raised); color: var(--text); }
.form-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); }
.form-footer span { color: var(--muted); font-size: 11px; }

.backtest-form-panel { max-width: none; }
.backtest-assumptions { margin-top: 17px; padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-raised); color: var(--muted); font-size: 11px; line-height: 1.5; }
.backtest-results { display: grid; gap: 12px; margin-top: 12px; }
.backtest-summary { padding-bottom: 9px; }
.backtest-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.backtest-metrics .metric-card { background: var(--surface-raised); }
.result-range { max-width: 420px; color: var(--muted); font-size: 11px; line-height: 1.45; text-align: right; }
.backtest-notice { margin: 16px 0 10px; padding: 12px 14px; border: 1px solid #5a4a28; border-radius: 8px; background: #221d13; color: var(--warning); font-size: 11px; line-height: 1.5; }
.backtest-notice.is-complete { border-color: #21443a; background: #10231f; color: var(--accent); }
#backtest-trade-rows td { font-size: 11px; }

.strategy-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.strategy-card { min-height: 180px; padding: 21px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.strategy-card .strategy-index { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 10px; }
.strategy-card h3 { margin: 25px 0 8px; font-size: 18px; }
.strategy-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.5; }

.settings-list { max-width: 800px; }
.settings-list > div { display: flex; justify-content: space-between; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--border); }
.settings-list > div:last-child { border-bottom: 0; }
.settings-list span { color: var(--muted); font-size: 13px; }
.settings-list strong { font-size: 13px; text-align: right; }

.live-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 12px 0; }
.live-grid .form-panel { max-width: none; }
.danger-copy { padding: 12px 14px; border: 1px solid #634349; border-radius: 8px; background: #26191d; color: #ffc5c5; font-size: 12px; line-height: 1.5; }
.confirmation-label { display: block; margin-top: 18px; }
code { color: var(--warning); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 11px; }
.secondary-button { border-color: var(--border-strong); background: transparent; color: var(--text); }
.secondary-button:hover:not(:disabled) { background: var(--surface-soft); }
#live-disarm-button { width: 100%; margin-top: 10px; }
.danger-button { border-color: #b85d63; background: var(--danger); color: #1a0808; }
.danger-button:hover:not(:disabled) { background: #ffaaaa; }
.confirm-panel { margin-top: 20px; padding: 17px; border: 1px solid #80545a; border-radius: 10px; background: #1b1519; }
.confirm-panel h3 { margin: 0 0 13px; }
.confirm-panel dl { display: grid; grid-template-columns: 1fr auto; gap: 8px 18px; margin: 0 0 15px; font-size: 12px; }
.confirm-panel dt { color: var(--muted); }
.confirm-panel dd { margin: 0; text-align: right; }
.confirm-panel button { width: 100%; margin-top: 14px; }
.emergency-panel { display: grid; grid-template-columns: 1fr minmax(280px, .8fr); gap: 28px; margin-bottom: 12px; border-color: #634349; }
.emergency-panel h2 { margin: 8px 0; }
.emergency-panel p:last-child { color: var(--muted); font-size: 12px; line-height: 1.5; }
.emergency-controls { display: grid; gap: 12px; }
.emergency-controls label:first-child { display: flex; align-items: center; gap: 9px; }
.emergency-controls input[type="checkbox"] { width: 17px; height: 17px; margin: 0; }
.live-orders-panel { margin-top: 12px; }

.mobile-nav { display: none; }
noscript { position: fixed; inset: auto 12px 12px; z-index: 100; padding: 12px; background: var(--danger); color: #1a0808; }

@media (max-width: 1080px) {
  .metrics-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid { grid-template-columns: 1fr; }
  .strategy-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .monitoring-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .backtest-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  body { padding-bottom: 66px; }
  .sidebar { display: none; }
  .main-content { width: 100%; margin-left: 0; padding: 20px 16px 30px; }
  .topbar { align-items: flex-start; margin-bottom: 20px; }
  .mode-pill { display: none; }
  .user-label { display: none; }
  .refresh-button { min-height: 38px; padding: 0 11px; font-size: 12px; }
  .hero-panel { min-height: 0; align-items: flex-start; flex-direction: column; padding: 25px 21px; }
  .hero-panel h2 { font-size: 38px; }
  .hero-status { width: 100%; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .metric-card { padding: 15px; }
  .metric-card strong { font-size: 19px; }
  .panel { padding: 17px; }
  .panel-heading { align-items: flex-start; }
  .chart-panel .panel-heading { flex-direction: column; }
  .form-grid, .strategy-grid { grid-template-columns: 1fr; }
  .live-grid, .emergency-panel { grid-template-columns: 1fr; }
  .monitoring-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-footer, .info-strip { align-items: flex-start; flex-direction: column; }
  .result-range { max-width: none; text-align: left; }
  .mobile-nav { position: fixed; inset: auto 0 0; z-index: 20; display: grid; grid-template-columns: repeat(5, 1fr); min-height: 62px; padding: 7px 5px max(7px, env(safe-area-inset-bottom)); background: #09141b; border-top: 1px solid var(--border); }
  .mobile-nav a { display: grid; place-items: center; border-radius: 7px; color: var(--muted); font-size: 10px; font-weight: 700; text-decoration: none; }
  .mobile-nav a.is-active { color: var(--accent); background: #10231f; }
}

@media (max-width: 430px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .backtest-metrics { grid-template-columns: 1fr; }
  .hero-panel h2 { font-size: 33px; }
  .segmented { width: 100%; }
  .segmented button { flex: 1; }
  .auth-card { padding: 25px 20px; }
  .logout-button { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}