:root {
  --bg: #0b0e14;
  --panel: #121722;
  --panel-border: #232b3a;
  --text: #e6e9f0;
  --text-dim: #8a93a8;
  --accent: #4da3ff;
  --accent-dim: #2c6fb0;
  --up: #35d07f;
  --down: #ff5c6c;
  --amber: #f0b429;
  --estimate: #b083f0; /* projected/estimated values only — never a directional signal, kept distinct from up/down/amber so it can't be mistaken for one */
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

/* Global safety net: an author rule setting `display` on an element
   (e.g. `.strategy-cards-alt{display:flex}`) otherwise beats the
   browser's own `[hidden]{display:none}` default at equal specificity,
   silently making `el.hidden = true` a no-op wherever that happens —
   found live on the Strategy panel's alternatives toggle. `!important`
   here is deliberate: `hidden` should always win over any `display`
   rule, everywhere on the page, not just wherever this was patched. */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.4;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #04101f;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.02em;
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.01em;
}

.brand-tag {
  color: var(--text-dim);
  font-size: 12px;
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

select {
  background: #0e131d;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 5px;
  padding: 5px 8px;
  font-family: var(--sans);
  font-size: 13px;
}

.conn-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-dim);
}

.conn-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--down);
  box-shadow: 0 0 6px var(--down);
}

.conn-status--up .dot {
  background: var(--up);
  box-shadow: 0 0 6px var(--up);
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-flow: dense; /* backfills gaps left by mixed 1/2/4-col cards instead of leaving them empty */
  gap: 14px;
  padding: 16px 20px 40px;
  max-width: 1600px;
  margin: 0 auto;
}

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 14px 16px;
  min-width: 0;
}

.card-wide { grid-column: span 2; }
.card-full { grid-column: 1 / -1; }

/* ---- strike panel: groups everything computed for one focused contract ---- */
.strike-panel {
  grid-column: 1 / -1;
  background: var(--panel);
  border: 1px solid var(--accent-dim);
  border-radius: 12px;
  overflow: hidden;
}

.strike-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: linear-gradient(180deg, rgba(77,163,255,0.10), rgba(77,163,255,0.03));
  border-bottom: 1px solid var(--panel-border);
}

.strike-id {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.strike-id-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.strike-id-main {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.strike-underlying {
  font-size: 16px;
  font-weight: 700;
}

.strike-price {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.strike-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: #1c2330;
  color: var(--text-dim);
}

.strike-badge--call { background: rgba(53,208,127,0.16); color: var(--up); }
.strike-badge--put { background: rgba(255,92,108,0.16); color: var(--down); }

.strike-instrument-id {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  overflow-wrap: anywhere;
}

.strike-quick-stats {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.qs {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-end;
}

.qs-k {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.qs-v {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
}

.strike-panel-body {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding: 16px;
}

.subcard {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 12px 14px;
  min-width: 0;
}

.subcard h3 {
  margin: 0 0 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 700;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.hint {
  text-transform: none;
  font-weight: 400;
  font-size: 11px;
  color: #5b6478;
  letter-spacing: 0;
}

.kv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.kv {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  border-bottom: 1px dashed #1c2330;
}

.k {
  color: var(--text-dim);
  font-size: 12px;
}

.v {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 600;
}

.v-up { color: var(--up); }
.v-down { color: var(--down); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  background: #1c2330;
  color: var(--text-dim);
}

.badge--long_buildup { background: rgba(53,208,127,0.15); color: var(--up); }
.badge--short_covering { background: rgba(53,208,127,0.15); color: var(--up); }
.badge--short_buildup { background: rgba(255,92,108,0.15); color: var(--down); }
.badge--long_unwinding { background: rgba(255,92,108,0.15); color: var(--down); }

/* Projected/estimated values (calculations/oi_projection.py) — dashed
   border, violet, deliberately not reusing up/down/amber so an estimate
   can never be mistaken for a confirmed reading at a glance. */
.badge--estimate {
  background: rgba(176,131,240,0.12);
  color: var(--estimate);
  border: 1px dashed var(--estimate);
}
.estimate-text { color: var(--estimate); }

.bar-split {
  display: flex;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  background: #1c2330;
  margin: 6px 0;
}

.bar-split-up { background: var(--up); }
.bar-split-down { background: var(--down); }

.pos-sub {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--mono);
}

.positioning-body {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.pos-block { min-width: 0; }

.pos-label {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pos-label .hint { text-transform: none; }

.chain-scroll {
  overflow-x: auto;
  max-height: 420px;
  overflow-y: auto;
}

.chain-table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.chain-table thead th {
  position: sticky;
  top: 0;
  background: #161d2b;
  color: var(--text-dim);
  font-weight: 600;
  padding: 6px 8px;
  border-bottom: 1px solid var(--panel-border);
  z-index: 1;
  white-space: nowrap;
}

.side-header.side-call { color: var(--up); text-align: right; }
.side-header.side-put { color: var(--down); text-align: left; }
.strike-header { background: #1c2330 !important; }

.chain-table td {
  padding: 5px 8px;
  text-align: right;
  border-bottom: 1px solid #171d29;
  cursor: pointer;
  white-space: nowrap;
}

.chain-table td.strike-cell {
  text-align: center;
  font-weight: 700;
  background: #161d2b;
  cursor: default;
  color: var(--text);
}

.chain-table tr.atm-row td.strike-cell {
  color: var(--amber);
}

.chain-table td.put-cell { text-align: left; }

.chain-table td:hover:not(.strike-cell) {
  background: #1a2233;
}

.chain-table tr.row-selected td {
  background: rgba(77,163,255,0.12);
}

.depth-ladder {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 12px;
}

.depth-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.depth-title--bid { color: var(--up); }
.depth-title--ask { color: var(--down); }

.depth-rows {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.depth-row {
  display: flex;
  justify-content: space-between;
  padding: 3px 6px;
  border-radius: 3px;
  background: #161d2b;
}

.depth-row .price { color: var(--text); }
.depth-row .qty { color: var(--text-dim); }

.ticker {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  max-height: 90px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ticker-item {
  padding: 4px 6px;
  background: #161d2b;
  border-radius: 4px;
  border-left: 2px solid var(--amber);
}

.footer {
  display: flex;
  justify-content: space-between;
  padding: 12px 20px 24px;
  color: #4c5568;
  font-size: 11px;
  max-width: 1600px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 8px;
}

.footer code {
  font-family: var(--mono);
  color: var(--text-dim);
}

/* ---- order flow detail: footprint, depth changes, contract volume profile ---- */
.badge--confirming { background: rgba(53,208,127,0.15); color: var(--up); }
.badge--diverging { background: rgba(255,92,108,0.15); color: var(--down); }
.badge--exhaustion { background: rgba(240,180,41,0.18); color: var(--amber); }

.order-flow-body {
  grid-template-columns: 1.4fr 1fr;
}

.order-flow-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.fp-card { display: flex; flex-direction: column; min-height: 0; }

.fp-header-row {
  display: grid;
  grid-template-columns: 1fr 70px 1fr;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  padding: 0 2px 6px;
}
.fp-header-row span:first-child { text-align: right; color: var(--up); }
.fp-header-row span:last-child { text-align: left; color: var(--down); }

.fp-rows {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 360px;
  overflow-y: auto;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
}

.fp-row {
  display: grid;
  grid-template-columns: 1fr 70px 1fr;
  align-items: center;
  padding: 3px 2px;
  border-radius: 4px;
  border-left: 2px solid transparent;
  border-right: 2px solid transparent;
}

.fp-row--imbalance-buy { border-right-color: var(--up); background: rgba(53,208,127,0.06); }
.fp-row--imbalance-sell { border-left-color: var(--down); background: rgba(255,92,108,0.06); }
.fp-row--absorption { background: rgba(240,180,41,0.10); }

.fp-sell, .fp-buy {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.fp-sell { justify-content: flex-end; }
.fp-buy { justify-content: flex-start; }

.fp-qty { color: var(--text-dim); font-size: 11px; }

.fp-bar {
  height: 12px;
  border-radius: 2px;
  min-width: 2px;
  max-width: 90px;
}
.fp-bar--buy { background: var(--up); }
.fp-bar--sell { background: var(--down); }

.fp-price {
  text-align: center;
  font-weight: 700;
  color: var(--text);
  padding: 0 4px;
}

.fp-flags {
  display: flex;
  gap: 4px;
  justify-content: center;
  font-size: 9px;
}

.vp-rows {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  max-height: 160px;
  overflow-y: auto;
}

.vp-row {
  display: grid;
  grid-template-columns: 56px 1fr 50px;
  align-items: center;
  gap: 8px;
}

.vp-row--poc .vp-price { color: var(--amber); font-weight: 700; }

.vp-price { text-align: right; color: var(--text-dim); }

.vp-bar-track {
  height: 10px;
  background: #1c2330;
  border-radius: 2px;
  overflow: hidden;
}

.vp-bar {
  height: 100%;
  background: var(--accent);
}

.vp-row--poc .vp-bar { background: var(--amber); }

.vp-qty { color: var(--text-dim); }

@media (max-width: 1100px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .card-wide { grid-column: span 2; }
  .positioning-body { grid-template-columns: repeat(2, 1fr); }
  .strike-panel-body { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; padding-inline: 16px; }
  .card-wide, .card-full { grid-column: 1; }
  .positioning-body { grid-template-columns: 1fr; }
  .depth-ladder { grid-template-columns: 1fr; }
  .kv-grid { grid-template-columns: 1fr; }
  .strike-panel-body { grid-template-columns: 1fr; }
  .strike-quick-stats { gap: 14px; }
  .qs { align-items: flex-start; }
}

/* Strategy cards: what a seller reads beside the strikes, and the warnings */
.strategy-metrics { font-size: 0.78rem; color: var(--muted, #9aa4b2); margin-top: 4px; }
.strategy-notes { font-size: 0.76rem; color: var(--amber, #f0b429); margin-top: 4px; }

.strategy-risk { margin-top: 4px; font-size: 11px; font-variant-numeric: tabular-nums; }
.strategy-risk-row { display: grid; grid-template-columns: 4.5em repeat(5, 1fr); gap: 4px; text-align: right; }
.strategy-risk-row b { text-align: left; font-weight: 500; color: var(--muted, #888); }
.strategy-risk-head { color: var(--muted, #888); }