/* ARB Terminal — design system.
   One dark theme, hairline panels, numbers set in a DIN-style face.
   Colour carries meaning only: ice blue = interactive, mint = long / gain,
   rose = short / loss, amber = needs attention. */

:root {
  --bg: #0d1320;
  --panel: #131b2b;
  --panel-2: #19233a;
  --line: #26344e;
  --line-soft: #1c2740;
  --text: #dce4f2;
  --text-2: #97a5bf;
  --text-3: #64748f;
  --accent: #58c4ff;
  --accent-ink: #062033;
  --pos: #35d9a6;
  --neg: #ff7089;
  --warn: #ffbe55;

  --font-ui: "Segoe UI Variable Text", "Segoe UI", "PingFang SC", "HarmonyOS Sans SC",
    "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  /* Bahnschrift ships with Windows, DIN Alternate with macOS: instrument-panel numerals */
  --font-num: "Bahnschrift", "DIN Alternate", "Roboto Condensed", "Segoe UI", "PingFang SC",
    "Microsoft YaHei UI", system-ui, sans-serif;

  --topbar-h: 46px;
  --status-h: 28px;
  --radius: 8px;
  --radius-s: 5px;
}

*, *::before, *::after { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.5 var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

h1, h2, p, dl, dd, pre { margin: 0; }
h1 { font-size: 17px; font-weight: 600; letter-spacing: 0.01em; }
h2 { font-size: 13.5px; font-weight: 600; }
a { color: var(--accent); text-decoration: none; }
i { font-style: normal; }
[hidden] { display: none !important; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-radius: 3px; }

.num { font-variant-numeric: tabular-nums; }
.big { font-family: var(--font-num); font-size: 15px; font-weight: 600; letter-spacing: 0.01em; }
.dim { color: var(--text-3); }
.pos { color: var(--pos); }
.neg { color: var(--neg); }
.warn-text { color: var(--warn); }

/* ------------------------------------------------------------ frame */

.topbar {
  position: sticky; top: 0; z-index: 20;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 28px;
  padding: 0 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.brand-mark {
  width: 22px; height: 22px; border-radius: 5px;
  background: var(--panel-2) url("/favicon.svg") center / 22px no-repeat;
}
.brand-name { font-family: var(--font-num); font-size: 15px; font-weight: 700; letter-spacing: 0.14em; }

.nav { display: flex; height: 100%; gap: 2px; }
.nav a {
  display: flex; align-items: center; padding: 0 14px;
  color: var(--text-2); font-size: 13.5px;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.nav a:hover { color: var(--text); }
.nav a.on { color: var(--text); border-bottom-color: var(--accent); }

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.who { color: var(--text-2); }

.app-main { padding: 14px 16px calc(var(--status-h) + 22px); }

.statusbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  height: var(--status-h);
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 0 16px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  color: var(--text-2); font-size: 12px; white-space: nowrap; overflow: hidden;
}
.venue-links, .feed-meta { display: flex; align-items: center; gap: 18px; }
.venue-link { display: inline-flex; align-items: center; gap: 6px; }
.venue-link b, .feed-meta b { font-family: var(--font-num); font-weight: 600; color: var(--text); }
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-3); }
.dot.up { background: var(--pos); box-shadow: 0 0 0 3px color-mix(in srgb, var(--pos) 18%, transparent); }
.dot.warn { background: var(--warn); }
.dot.down { background: var(--neg); }
.feed-mode { color: var(--text); }
.feed-mode.mock { color: var(--warn); }

/* ------------------------------------------------------------ building blocks */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 0;
}
.panel-head {
  display: flex; align-items: center; flex-wrap: wrap; gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.stack { display: grid; gap: 14px; }
.stack.narrow { max-width: 980px; }

.tabs { display: flex; gap: 2px; padding: 0 8px; border-bottom: 1px solid var(--line); }
.tabs button {
  appearance: none; background: none; border: 0; cursor: pointer;
  padding: 11px 14px 10px; font: inherit; font-size: 13.5px; color: var(--text-2);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tabs button:hover { color: var(--text); }
.tabs button.on { color: var(--text); border-bottom-color: var(--accent); }

.toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 12px; padding: 10px 14px; }
.toolbar-label { color: var(--text-3); margin-left: 6px; }
.toolbar-meta { margin-left: auto; color: var(--text-3); font-size: 12px; }
.toolbar-meta b { color: var(--text); font-family: var(--font-num); }
.hint { padding: 0 14px 10px; color: var(--text-3); font-size: 12px; max-width: 78ch; }

.btn {
  appearance: none; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  height: 30px; padding: 0 14px;
  font: inherit; font-size: 13px; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-s);
  transition: border-color 0.12s, background 0.12s;
}
.btn:hover { border-color: var(--text-3); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { background: #7bd2ff; border-color: #7bd2ff; }
.btn.danger { background: transparent; border-color: var(--neg); color: var(--neg); }
.btn.danger:hover { background: color-mix(in srgb, var(--neg) 14%, transparent); }
.btn.quiet { background: transparent; color: var(--text-2); }
.btn.small { height: 25px; padding: 0 10px; font-size: 12px; }
.btn.wide { width: 100%; height: 36px; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--radius-s); overflow: hidden; }
.seg button {
  appearance: none; cursor: pointer; border: 0; border-right: 1px solid var(--line);
  height: 26px; padding: 0 11px; font: inherit; font-size: 12px;
  background: transparent; color: var(--text-2);
}
.seg button:last-child { border-right: 0; }
.seg button:hover { color: var(--text); }
.seg button.on { background: var(--panel-2); color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  appearance: none; cursor: pointer;
  height: 26px; padding: 0 10px; font: inherit; font-size: 12px;
  color: var(--text-3); background: transparent;
  border: 1px solid var(--line); border-radius: 13px;
}
.chip.on { color: var(--text); border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }

input, select {
  height: 30px; padding: 0 10px;
  font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-s);
}
input::placeholder { color: var(--text-3); }
input:focus, select:focus { outline: none; border-color: var(--accent); }
.search { width: 240px; }

.tag {
  display: inline-block; margin-left: 6px; padding: 0 6px;
  font-size: 11px; line-height: 17px; color: var(--text-2);
  border: 1px solid var(--line); border-radius: 3px;
}

.side {
  display: inline-block; min-width: 18px; margin-right: 6px; padding: 0 3px;
  font-size: 11px; line-height: 17px; text-align: center; font-weight: 600; border-radius: 3px;
}
.side.long { color: var(--pos); background: color-mix(in srgb, var(--pos) 14%, transparent); }
.side.short { color: var(--neg); background: color-mix(in srgb, var(--neg) 14%, transparent); }

.inst { color: var(--text-3); font-size: 12px; font-variant-numeric: tabular-nums; }
.empty { padding: 26px 14px; color: var(--text-3); text-align: center; }

.alert { margin: 12px 14px 0; padding: 10px 12px; border-radius: var(--radius-s); border: 1px solid; font-size: 12.5px; }
.alert p { margin-top: 4px; }
.alert .btn { margin-top: 8px; }
.alert.warn { border-color: color-mix(in srgb, var(--warn) 55%, transparent); color: var(--warn); background: color-mix(in srgb, var(--warn) 8%, transparent); }
.alert.danger { border-color: var(--neg); color: var(--text); background: color-mix(in srgb, var(--neg) 12%, transparent); }
.alert.danger b { color: var(--neg); }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 12.5px; }
.kv dt { color: var(--text-3); white-space: nowrap; }
.kv dd { font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.prose { padding: 12px 14px 14px; color: var(--text-2); max-width: 76ch; }
.prose p + p, .prose pre + p { margin-top: 8px; }
.prose pre {
  margin-top: 8px; padding: 10px 12px; overflow-x: auto;
  font: 12px/1.6 ui-monospace, "Cascadia Mono", Consolas, monospace; color: var(--text);
  background: var(--bg); border: 1px solid var(--line-soft); border-radius: var(--radius-s);
}

.stats { display: flex; flex-wrap: wrap; gap: 12px 44px; padding: 14px; }
.stat { display: grid; gap: 2px; }
.stat span { color: var(--text-3); font-size: 12px; }
.stat b.big { font-size: 20px; }

/* ------------------------------------------------------------ tables */

.table-scroll { overflow-x: auto; }
/* the board keeps its header pinned under the top bar, so it must not sit in a scroll box */
.board-wrap { overflow: visible; }

table.data { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.data th {
  padding: 8px 12px; text-align: left; font-weight: 500; font-size: 12px; white-space: nowrap;
  color: var(--text-3); border-bottom: 1px solid var(--line);
}
table.data td { padding: 8px 12px; border-bottom: 1px solid var(--line-soft); white-space: nowrap; vertical-align: middle; }
table.data tr:last-child > td { border-bottom: 0; }
table.data th.num, table.data td.num { text-align: right; }
table.data .sub { font-size: 11.5px; color: var(--text-3); }
table.data .sub.pos { color: var(--pos); }
table.data .sub.neg { color: var(--neg); }

table.board th { position: sticky; top: var(--topbar-h); z-index: 2; background: var(--panel); }
table.board tr.row { cursor: pointer; }
table.board tr.row > td { padding-top: 6px; padding-bottom: 6px; }
table.board tr.row:hover > td, table.board tr.row.open > td { background: var(--panel-2); }
table.board .rank { width: 44px; color: var(--text-3); }
table.board .spread { text-align: right; }
table.board .win { line-height: 1.35; }
.row-action { width: 1%; text-align: right; }

.expander {
  appearance: none; background: none; border: 0; padding: 0; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px; font: inherit; color: var(--text);
}
.expander b { font-size: 13.5px; font-weight: 600; letter-spacing: 0.02em; }
.chev {
  width: 6px; height: 6px; margin: 0 2px;
  border-right: 1.5px solid var(--text-3); border-bottom: 1.5px solid var(--text-3);
  transform: rotate(-45deg); transition: transform 0.12s;
}
.expander[aria-expanded="true"] .chev { transform: rotate(45deg); border-color: var(--accent); }

.route .leg { display: inline-flex; align-items: center; margin-right: 14px; }

.coverage { white-space: nowrap; }
.cov-dots { display: inline-flex; gap: 3px; margin-right: 8px; vertical-align: middle; }
.cov-dots i { width: 6px; height: 12px; border-radius: 1.5px; background: var(--line); }
.cov-dots i.on { background: var(--accent); }

tr.detail > td { padding: 0 0 0 44px !important; background: var(--bg); border-bottom: 1px solid var(--line) !important; }
table.routes th { position: static; background: transparent; }
table.routes tr.stale td { opacity: 0.5; }
.route-leg .venue { margin-right: 8px; }

/* ------------------------------------------------------------ login */

.login-wrap { min-height: calc(100vh - var(--topbar-h) - 80px); display: grid; place-items: center; }
.login-card {
  width: min(360px, 100%); display: grid; gap: 8px; padding: 26px 26px 22px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
}
.login-card h1 { font-size: 20px; }
.login-sub { color: var(--text-2); margin-bottom: 10px; }
.login-card label, .form label, .ticket-body label { color: var(--text-2); font-size: 12px; margin-top: 4px; }
.login-card input { height: 36px; }
.login-card .btn { margin-top: 10px; }
.login-foot { margin-top: 10px; color: var(--text-3); font-size: 12px; }
.form-error { min-height: 18px; color: var(--neg); font-size: 12.5px; }

.form { display: grid; gap: 6px; padding: 14px; max-width: 340px; }
.form .btn { margin-top: 6px; justify-self: start; }

/* ------------------------------------------------------------ trading */

.trade { display: grid; gap: 14px; }

.pair-head { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 40px; padding: 12px 14px; }
.pair-id { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 16px; }
.pair-id h1 { font-family: var(--font-num); font-size: 24px; font-weight: 700; letter-spacing: 0.03em; margin-right: 4px; }
.pair-leg { display: inline-flex; align-items: baseline; gap: 2px; }
.pair-leg .venue { font-weight: 600; margin-right: 6px; }
.leg-vol { margin-left: 8px; font-size: 12px; font-variant-numeric: tabular-nums; }
.leg-vol.dim { color: var(--text-3); }
.route-select { max-width: 280px; height: 26px; font-size: 12px; }
.pair-stats { display: flex; gap: 36px; margin-left: auto; }
.pair-stats .stat b.big { font-size: 19px; }

.pair-picker {
  flex-basis: 100%; display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px;
  padding-top: 12px; border-top: 1px solid var(--line-soft);
}
.pair-picker input, .pair-picker select { height: 26px; font-size: 12px; }
#pick-symbol { width: 120px; text-transform: uppercase; }
.pick-leg { display: inline-flex; align-items: center; gap: 6px; }
.pick-inst { width: 150px; }
.pick-note { font-size: 12px; }

.trade-grid { display: grid; grid-template-columns: minmax(0, 1fr) 400px; gap: 14px; align-items: start; }
.trade-main, .trade-rail { display: grid; gap: 14px; min-width: 0; }

.legend { display: inline-flex; gap: 16px; color: var(--text-2); font-size: 12px; }
.swatch { display: inline-block; width: 12px; height: 3px; margin-right: 6px; vertical-align: middle; border-radius: 2px; }
.swatch.entry { background: var(--warn); }
.swatch.exit { background: var(--accent); }
.swatch.long { background: var(--pos); }
.swatch.short { background: var(--neg); }
.swatch.spread { background: var(--accent); }

.chart-row { display: grid; grid-template-columns: minmax(0, 1fr) 250px; align-items: stretch; }
.chart-stack { display: grid; grid-template-rows: minmax(260px, 1.65fr) auto minmax(150px, 0.85fr); min-height: 520px; min-width: 0; }
.chart-wrap { position: relative; min-height: 0; }
.chart-wrap.funding { min-height: 150px; }
.chart-subhead {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 4px 10px 2px; border-top: 1px solid var(--line-soft);
}
.chart-wrap canvas, .chart-wrap #spread-chart, .chart-wrap #funding-chart {
  position: absolute; left: 4px; top: 6px; width: calc(100% - 4px); height: calc(100% - 6px); cursor: crosshair;
}
.chart-tip {
  position: absolute; top: 14px; z-index: 3; pointer-events: none;
  padding: 8px 10px; font-size: 12px; line-height: 1.7; white-space: nowrap;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-s);
}
.chart-tip b { font-family: var(--font-num); }
.swatch.mid { background: #8b9bb8; }
.chart-ind { position: relative; }
.chart-ind-menu {
  position: absolute; left: 0; top: calc(100% + 6px); z-index: 8;
  min-width: 220px; padding: 6px 0;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-s);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
}
.chart-ind-menu label {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 12px; font-size: 12.5px; color: var(--text-2); cursor: pointer;
}
.chart-ind-menu label:hover { background: var(--panel); color: var(--text); }
.chart-ind-menu hr { border: 0; border-top: 1px solid var(--line-soft); margin: 4px 0; }
.chart-ind-menu input[type="checkbox"] { accent-color: var(--accent); }

.books { border-left: 1px solid var(--line-soft); display: grid; grid-template-rows: 1fr 1fr; }
.book { padding: 8px 10px; min-height: 0; }
.book + .book { border-top: 1px solid var(--line-soft); }
.book-head { display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; }
.book-state { font-size: 11.5px; }
.book-cols, .depth { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 6px; }
.book-cols { margin: 6px 0 2px; color: var(--text-3); font-size: 11px; }
.book-cols span:not(:first-child), .depth span:not(:first-of-type) { text-align: right; }
.book-rows .empty { padding: 30px 6px; font-size: 12px; }
.depth { position: relative; font-size: 11.5px; line-height: 19px; }
.depth .bar { position: absolute; right: 0; top: 1px; bottom: 1px; border-radius: 1px; opacity: 0.16; }
.depth.ask .bar { background: var(--neg); }
.depth.bid .bar { background: var(--pos); }
.depth.ask span:first-of-type { color: var(--neg); }
.depth.bid span:first-of-type { color: var(--pos); }
.depth span { position: relative; }
.depth-mid {
  display: flex; justify-content: space-between; align-items: baseline;
  margin: 3px 0; padding: 3px 0; font-size: 11.5px;
  border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft);
}
.depth-mid b { font-family: var(--font-num); font-size: 13px; }

table.terminal td, table.terminal th { padding: 8px 10px; }
.lev-btn {
  appearance: none; cursor: pointer; font: inherit; color: var(--accent);
  background: none; border: 0; border-bottom: 1px dashed var(--accent); padding: 0;
}
.lev-input { width: 58px; height: 24px; padding: 0 6px; text-align: right; }

.ticket .panel-head { border-top: 1px solid var(--line-soft); }
.ticket-body { display: grid; gap: 6px; padding: 12px 14px 14px; }
.ticket-body .hint { padding: 0; }
.ticket-actions { display: grid; grid-template-columns: 1fr 1.3fr 1fr; gap: 8px; margin-top: 10px; }
.quote-out:not(:empty) { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line-soft); }
.quote-out .hint { padding: 0; }
.quote-out .hint.neg { color: var(--neg); }
.quote-out .hint.pos { color: var(--pos); }

.event-log { max-height: 260px; overflow-y: auto; padding: 4px 0; }
.event { display: grid; grid-template-columns: 62px 1fr; gap: 8px; padding: 5px 14px; font-size: 12px; overflow-wrap: anywhere; }
.event.ok { color: var(--pos); }
.event.err { color: var(--neg); }

/* ------------------------------------------------------------ overlays */

.toast-layer { position: fixed; right: 16px; bottom: calc(var(--status-h) + 14px); z-index: 60; display: grid; gap: 8px; justify-items: end; }
.toast {
  max-width: 420px; padding: 9px 13px; font-size: 12.5px;
  background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--radius-s);
}
.toast.err { border-left-color: var(--neg); }

.modal-backdrop {
  position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 16px;
  background: rgba(5, 9, 17, 0.72);
}
.modal {
  width: min(480px, 100%); display: grid; gap: 14px; padding: 20px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
}
.modal-note { color: var(--text-2); font-size: 12.5px; }
.form-modal { gap: 6px; }
.form-modal h2 { margin-bottom: 8px; }
.form-modal label { color: var(--text-2); font-size: 12px; margin-top: 4px; }
.form-modal .modal-note { margin-top: 8px; }
.field-hint { color: var(--text-3); font-size: 11.5px; }
.inline-form { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.inline-form input { width: 110px; text-align: right; }
.btn-row { display: inline-flex; gap: 6px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 4px; }

/* ------------------------------------------------------------ small screens */

@media (max-width: 1180px) {
  .trade-grid { grid-template-columns: 1fr; }
  .pair-stats { margin-left: 0; }
}
@media (max-width: 760px) {
  .topbar { gap: 12px; padding: 0 10px; }
  .brand-name, .who { display: none; }
  .nav a { padding: 0 10px; }
  .app-main { padding: 10px 8px calc(var(--status-h) + 18px); }
  .chart-row { grid-template-columns: 1fr; }
  .chart-stack { min-height: 420px; grid-template-rows: minmax(220px, 1.5fr) auto minmax(140px, 0.9fr); }
  .chart-wrap { min-height: 0; }
  .books { border-left: 0; border-top: 1px solid var(--line-soft); grid-template-rows: none; grid-template-columns: 1fr 1fr; }
  .book + .book { border-top: 0; border-left: 1px solid var(--line-soft); }
  .feed-meta span:not(.feed-mode) { display: none; }
  .search { width: 100%; }
  tr.detail > td { padding-left: 0 !important; }
  table.board th { position: static; }
  .board-wrap { overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ------------------------------------------------------------ hedges / fees */
.sub-head { padding: 12px 14px 4px; color: var(--text-2); font-size: 12px; border-top: 1px solid var(--line); }
.inline-form.fees { gap: 8px 16px; }
.inline-form.fees label { display: inline-flex; align-items: center; gap: 6px; }
.inline-form.fees input { width: 64px; }
table.data .sub.pos { color: var(--pos); }