/* FLOWWEB: a strip-chart recorder (graph paper, pens per cohort) with a mixing console (mute, solo, LED meters).
   Tokens are the design plan's (docs/design/FLOWWEB.md section 3). Light is the default; dark follows the system or the
   switch (data-theme). No inline styles, no script in the page: the CSP is 'self' plus the two Google Fonts hosts. */

:root {
  /* light: graph paper */
  --paper: #E8EEE9;
  --panel: #F4F7F4;
  --grid: #C3D6D1;
  --rule: #9FB5B0;
  --ink: #15191E;
  --mute: #5C6A70;
  --up: #1F7A4D;
  --down: #C2362B;
  --c0: #66707A;
  --c1: #2357B5;
  --c2: #0F8A7A;
  --c3: #A07A00;
  --c4: #D4461B;
  --c5: #8E2A8C;
  --c6: var(--ink);
  --focus: #2357B5;
  --up-soft: rgba(31, 122, 77, 0.34);
  --down-soft: rgba(194, 54, 43, 0.34);
  --gapshade: rgba(21, 25, 30, 0.07);
  --bub-up: rgba(31, 122, 77, 0.5);                 /* big-order bubbles: translucent so the candles stay readable */
  --bub-down: rgba(194, 54, 43, 0.5);

  --f-display: "Big Shoulders Display", "Arial Narrow", "Franklin Gothic Medium", "Helvetica Neue", sans-serif;
  --f-body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-data: "Chivo Mono", ui-monospace, Menlo, Consolas, "Liberation Mono", monospace;

  --s-12: 12px;
  --s-14: 14px;
  --s-16: 16px;
  --s-20: 20px;
  --s-28: 28px;
  --gutter: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #10161A;
    --panel: #162027;
    --grid: #22343C;
    --rule: #2E444D;
    --ink: #E6EEF0;
    --mute: #8FA3AB;
    --up: #3CCB8A;
    --down: #FF6B5E;
    --c0: #9AA5AF;
    --c1: #6F9BFF;
    --c2: #3FD0B8;
    --c3: #E8C14A;
    --c4: #FF7A4D;
    --c5: #E07BDB;
    --c6: #F2F5F6;
    --focus: #6F9BFF;
    --up-soft: rgba(60, 203, 138, 0.36);
    --down-soft: rgba(255, 107, 94, 0.36);
    --gapshade: rgba(230, 238, 240, 0.08);
    --bub-up: rgba(60, 203, 138, 0.55);
    --bub-down: rgba(255, 107, 94, 0.55);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #10161A;
  --panel: #162027;
  --grid: #22343C;
  --rule: #2E444D;
  --ink: #E6EEF0;
  --mute: #8FA3AB;
  --up: #3CCB8A;
  --down: #FF6B5E;
  --c0: #9AA5AF;
  --c1: #6F9BFF;
  --c2: #3FD0B8;
  --c3: #E8C14A;
  --c4: #FF7A4D;
  --c5: #E07BDB;
  --c6: #F2F5F6;
  --focus: #6F9BFF;
  --up-soft: rgba(60, 203, 138, 0.36);
  --down-soft: rgba(255, 107, 94, 0.36);
  --gapshade: rgba(230, 238, 240, 0.08);
  --bub-up: rgba(60, 203, 138, 0.55);
  --bub-down: rgba(255, 107, 94, 0.55);
  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-width: 0;
  background-color: var(--paper);
  background-image: linear-gradient(to right, var(--grid) 1px, transparent 1px), linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  color: var(--ink);
  font: 400 var(--s-14)/1.45 var(--f-body);
  overflow-x: hidden;
}

body::before {                            /* the grid is faint on the paper: a veil keeps text readable */
  content: "";
  position: fixed;
  inset: 0;
  background: var(--paper);
  opacity: 0.86;
  pointer-events: none;
  z-index: -1;
}

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--panel);
  color: var(--ink);
  padding: 6px 10px;
  z-index: 10;
}
.skip:focus { left: 8px; top: 8px; }

.noscript { padding: var(--gutter); }

.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 12px var(--gutter);
  padding: 12px var(--gutter) 24px;
  max-width: 1600px;
  margin: 0 auto;
}

/* ------------------------------------------------------------------ top bar */
.bar {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 10px 12px;
}
.bar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
}
.bar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; min-width: 0; flex-wrap: wrap; justify-content: flex-end; }

.brand { display: flex; align-items: baseline; gap: 10px; min-width: 0; margin-right: 6px; }

.title {
  margin: 0;
  font: 800 var(--s-28)/1 var(--f-display);
  letter-spacing: 0.02em;
  color: var(--ink);
}

.sub { color: var(--mute); font-size: var(--s-12); white-space: nowrap; }

.seg {
  display: inline-flex;
  flex-wrap: wrap;
  border: 1px solid var(--rule);
  border-radius: 8px;
  overflow: hidden;
  background: var(--paper);
}

.seg button {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font: 500 var(--s-14)/1 var(--f-body);
  padding: 9px 12px;
  min-height: 36px;
  cursor: pointer;
  white-space: nowrap;
}
.seg button:last-child { border-right: 0; }
.seg button:hover { background: var(--grid); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.btn {
  appearance: none;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  font: 600 var(--s-14)/1 var(--f-body);
  padding: 9px 12px;
  min-height: 36px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--grid); }
.btn.ghost { background: transparent; }

.status {
  margin: 0;
  color: var(--mute);
  font: 400 var(--s-12)/1.3 var(--f-data);
  text-align: right;
  min-width: 0;
}
.status.bad { color: var(--down); }

.more-panel {
  flex-basis: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--rule);
}
.more-panel[hidden] { display: none; }

.phone-only { display: none; }

/* ------------------------------------------------------------------ charts */
.charts { grid-column: 1; min-width: 0; display: flex; flex-direction: column; gap: 6px; }

.readout {
  min-height: 42px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 12px;
  font: 400 var(--s-12)/1.3 var(--f-data);
  color: var(--mute);
  padding: 2px 2px 0;
}
.readout .t { color: var(--ink); font-weight: 600; }
.readout .ro { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.readout .ro::before {
  content: "";
  width: 10px;
  height: 3px;
  border-radius: 2px;
  background: var(--pen, var(--mute));
}
.readout .ro.candle::before { width: 4px; height: 12px; background: var(--ink); }
.readout .ro b { color: var(--ink); font-weight: 500; }

.chart-wrap {
  position: relative;
  height: clamp(540px, 88vh, 900px);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--panel);
  background-image: linear-gradient(to right, var(--grid) 1px, transparent 1px), linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
}
.chart-host { position: absolute; inset: 0; }

/* pane name tags (perpetual / spot): over the chart, never catching the pointer */
.pane-label {
  position: absolute;
  left: 8px;
  z-index: 3;
  max-width: calc(100% - 96px);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 8px;
  padding: 3px 8px 4px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--panel) 85%, transparent);
  font: 400 11px/1.35 var(--f-data);
  color: var(--mute);
  pointer-events: none;
}
.pane-label b {
  font: 800 15px/1 var(--f-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
}
.pane-label[hidden] { display: none; }

.chart-wrap.loading::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, var(--up-soft), transparent);
  transform: translateX(-100%);
  animation: sweep 1.6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes sweep { to { transform: translateX(100%); } }

.notice {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 5;
  width: min(92%, 460px);
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--ink);
  font-size: var(--s-14);
  text-align: center;
}
.notice[hidden] { display: none; }
.notice.bad { border-color: var(--down); }

/* ------------------------------------------------------------------ the console */
.console {
  grid-column: 2;
  grid-row: 2;
  align-self: start;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  min-width: 0;
}

.console-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.console-title {
  margin-left: auto;
  font: 800 var(--s-20)/1 var(--f-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.console-note {
  margin: 0;
  padding: 8px 12px 10px 16px;
  border-top: 1px solid var(--rule);
  font: 400 var(--s-12)/1.4 var(--f-data);
  color: var(--mute);
}
.console-note b { color: var(--ink); font-weight: 600; }

.strips {
  list-style: none;
  margin: 0;
  padding: 0;
}

.strip {
  position: relative;
  padding: 10px 12px 9px 16px;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: 8px;
  transition: opacity 150ms ease-out;
}
.strip:first-child { border-top: 0; }
.strip::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 5px;
  border-radius: 0 3px 3px 0;
  background: var(--pen);
}
.strip[data-key="c0"] { --pen: var(--c0); }
.strip[data-key="c1"] { --pen: var(--c1); }
.strip[data-key="c2"] { --pen: var(--c2); }
.strip[data-key="c3"] { --pen: var(--c3); }
.strip[data-key="c4"] { --pen: var(--c4); }
.strip[data-key="c5"] { --pen: var(--c5); }
.strip[data-key="all"] { --pen: var(--c6); }
.strip.off { opacity: 0.5; }
.strip.dim { opacity: 0.4; }

.tog {
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  padding: 2px 0;
  min-height: 32px;
  cursor: pointer;
  text-align: left;
}
.tog .name {
  font: 700 var(--s-16)/1.1 var(--f-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tog .state {
  font: 600 var(--s-12)/1 var(--f-data);
  letter-spacing: 0.06em;
  padding: 5px 8px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--paper);
  flex: 0 0 auto;
}
.strip.off .tog .state { color: var(--mute); }

.solo {
  appearance: none;
  justify-self: start;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--mute);
  font: 500 var(--s-12)/1 var(--f-body);
  padding: 6px 9px;
  border-radius: 6px;
  cursor: pointer;
  min-height: 28px;
}
.solo[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.meters { display: flex; gap: 12px; align-items: center; }
.meter-cell { display: flex; align-items: center; gap: 6px; min-width: 0; }
.meter-cell .k { font: 500 var(--s-12)/1 var(--f-data); color: var(--mute); width: 10px; }
.meter {
  display: grid;
  grid-template-columns: repeat(11, 9px);
  gap: 2px;
  height: 12px;
}
.meter i { display: block; background: var(--grid); border-radius: 1px; transition: background-color 150ms ease-out; }
.meter i.zero { background: var(--rule); }
.meter i.up { background: var(--up); }
.meter i.down { background: var(--down); }
.strip.off .meter i.up, .strip.off .meter i.down { background: var(--rule); }

/* ------------------------------------------------------------------ stats */
.stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gutter);
}

.card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  min-width: 0;
}
.card > summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 14px 8px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}
.card > summary::-webkit-details-marker { display: none; }
.card > summary::after {
  content: "−";
  flex: 0 0 auto;
  color: var(--mute);
  font: 500 var(--s-20)/1 var(--f-data);
  margin-top: 2px;
}
.card:not([open]) > summary::after { content: "+"; }
.section {
  margin: 0;
  font: 800 var(--s-20)/1.1 var(--f-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.card-body { padding: 0 14px 14px; }
.card-note { color: var(--mute); font-size: var(--s-12); margin: 0 0 8px; }

.tbl { width: 100%; border-collapse: collapse; font: 400 var(--s-12)/1.3 var(--f-data); font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { padding: 5px 4px; text-align: right; border-top: 1px solid var(--rule); white-space: nowrap; }
.tbl th { font-weight: 500; color: var(--mute); }
.tbl th:first-child, .tbl td:first-child { text-align: left; }
.tbl td.pos { color: var(--up); }
.tbl td.neg { color: var(--down); }
.tbl .sub { font-family: var(--f-body); font-size: var(--s-12); color: var(--mute); }
.tbl-scroll { overflow-x: auto; }

.moves { max-height: 260px; overflow-y: auto; margin-top: 10px; border-top: 1px solid var(--rule); }
.moves ol { list-style: none; margin: 0; padding: 0; }
.moves li {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 8px;
  padding: 6px 2px;
  border-bottom: 1px dotted var(--rule);
  font: 400 var(--s-12)/1.3 var(--f-data);
}
.moves .cls { font-family: var(--f-body); color: var(--ink); }

.foot {
  grid-column: 1 / -1;
  color: var(--mute);
  font-size: var(--s-12);
  padding: 4px 2px 0;
}
.foot p { margin: 0 0 4px; }
.foot .fine { font: 400 12px/1.4 var(--f-data); }

/* ------------------------------------------------------------------ narrower screens: the console is a bottom sheet */
@media (max-width: 1099px) {
  .console-note { display: none; }
  .app { grid-template-columns: minmax(0, 1fr); padding-bottom: 128px; }
  .charts { grid-column: 1; grid-row: auto; }
  .console {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    grid-column: auto;
    grid-row: auto;
    z-index: 20;
    border-radius: 14px 14px 0 0;
    display: flex;
    align-items: stretch;
    gap: 0;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    border-bottom: 0;
    background: var(--panel);
    box-shadow: 0 -6px 18px rgba(0, 0, 0, 0.08);
  }
  .console-head {
    flex: 0 0 auto;
    flex-direction: column;
    align-items: stretch;
    background: transparent;
    border: 0;
    padding: 0 8px 0 0;
    justify-content: center;
  }
  .console-head .btn { min-height: 40px; }
  .console-title { display: none; }
  .strips {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
    padding: 2px 2px 2px 0;
  }
  .strip {
    flex: 0 0 auto;
    width: 150px;
    scroll-snap-align: start;
    border: 1px solid var(--rule);
    border-radius: 10px;
    padding: 8px 10px 8px 14px;
    row-gap: 6px;
    background: var(--paper);
  }
  .strip:first-child { border-top: 1px solid var(--rule); }
  .strip::before { top: 6px; bottom: 6px; }
  .tog { min-height: 30px; }
  .tog .state { display: none; }
  .tog .name { font-size: var(--s-16); }
  .solo { display: none; }
  .meters .meter-cell:nth-child(2) { display: none; }
  .meter { grid-template-columns: repeat(11, 7px); height: 10px; }
  .strip.off .tog .name { color: var(--mute); text-decoration: line-through; text-decoration-thickness: 1px; }
  .strip.dim { opacity: 0.45; }
  .stats { grid-template-columns: minmax(0, 1fr); }
  .card > summary { padding-top: 10px; }
  .chart-wrap { height: 86vh; min-height: 480px; }
  .bar-right { margin-left: 0; width: 100%; justify-content: space-between; }
  .status { text-align: left; }
}

/* ------------------------------------------------------------------ phones */
@media (max-width: 699px) {
  :root { --gutter: 16px; }
  .pane-label span { display: none; }
  .app { padding: 10px var(--gutter) 128px; gap: 10px var(--gutter); }
  .bar { padding: 8px 10px; gap: 8px; border-radius: 8px; }
  .brand { margin-right: 0; }
  .bar-right { display: contents; }
  #theme { margin-left: auto; }
  .sub { display: none; }
  .title { font-size: var(--s-20); }
  .seg button { padding: 8px 9px; font-size: var(--s-12); }
  .seg.wide { display: none; }
  .phone-only { display: inline-block; }
  .status { font-size: 12px; order: 3; flex-basis: 100%; text-align: left; }
  .bar-row.controls { gap: 8px; }
  .chart-wrap { height: 86vh; min-height: 0; }
  .readout { min-height: 56px; font-size: 12px; }
  .stats { gap: 10px; }
  .card { border-radius: 10px; }
  .tbl { font-size: 12px; }
  .moves li { grid-template-columns: 84px 1fr auto; }
}

/* ------------------------------------------------------------------ motion and contrast preferences */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .chart-wrap.loading::after { display: none; }
}