/* ==========================================================================
   aiStream Simulator Platform — Design System
   Shared across all simulator pages and the portal.
   Source: extracted and consolidated from all ComplianceSimulator HTML files.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Surface */
  --paper:       #F5F2EA;
  --paper-dark:  #EDE9DE;
  --panel:       #FDFBF5;

  /* Ink */
  --ink:         #1A1816;
  --ink-mid:     #5C584F;
  --ink-soft:    #8A8578;
  --rule:        #2A2724;
  --hairline:    #DBD6C6;

  /* Semantic colours — haemodynamics */
  --ua:          #C44825;   /* umbilical artery */
  --uv:          #185FA5;   /* umbilical vein */
  --plac:        #BA7517;   /* placenta / intervillous */
  --flow:        #0F6E56;   /* normal flow */
  --ecmo:        #5B4A8A;   /* ECMO circuit */
  --normal:      #0F6E56;
  --warn:        #A36B0E;
  --danger:      #8B2B1A;

  /* Doppler oscilloscope */
  --doppler-bg:   #0A0E14;
  --doppler-fg:   #E8DC8A;
  --doppler-grid: #2A2C30;
  --doppler-axis: #8B8478;

  /* Typography */
  --serif: 'IBM Plex Serif', Georgia, serif;
  --sans:  'IBM Plex Sans',  system-ui, sans-serif;
  --mono:  'IBM Plex Mono',  'SFMono-Regular', Menlo, monospace;
}

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

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.45;
}

/* --------------------------------------------------------------------------
   Platform header (portal + simulators)
   -------------------------------------------------------------------------- */
.platform-header {
  padding: 16px 28px 13px;
  border-bottom: 2px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 20px;
  background: var(--paper);
}
.platform-header h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  margin: 0;
  letter-spacing: -0.01em;
}
.platform-header .sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12px;
  color: var(--ink-mid);
  margin-top: 3px;
}
.platform-header .header-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.user-chip {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mid);
  background: var(--paper-dark);
  border: 1px solid var(--hairline);
  border-radius: 99px;
  padding: 4px 10px;
}
.back-link {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: .04em;
}
.back-link:hover { color: var(--ink); }

/* --------------------------------------------------------------------------
   Run controls row (simulator header)
   -------------------------------------------------------------------------- */
.run-controls {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.run-controls label {
  display: flex;
  flex-direction: column;
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-mid);
}
.run-controls select,
.run-controls input[type="number"] {
  margin-top: 3px;
  padding: 5px 8px;
  font-family: var(--mono);
  font-size: 12px;
  border: 1px solid var(--hairline);
  background: var(--panel);
  color: var(--ink);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 13px;
  padding: 7px 14px;
  border: 1px solid var(--rule);
  background: var(--panel);
  color: var(--ink);
  border-radius: 2px;
  cursor: pointer;
  transition: background 120ms, color 120ms;
  text-decoration: none;
  display: inline-block;
}
.btn:hover        { background: var(--ink); color: var(--panel); }
.btn.primary      { background: var(--ink); color: var(--panel); }
.btn.primary:hover{ background: var(--rule); }
.btn.ghost        { border-color: var(--hairline); color: var(--ink-mid); }
.btn.ghost:hover  { background: var(--paper-dark); color: var(--ink); }
.btn.sm           { font-size: 11px; padding: 4px 10px; }

/* --------------------------------------------------------------------------
   Two-column simulator layout
   -------------------------------------------------------------------------- */
.sim-main {
  display: grid;
  grid-template-columns: 360px 1fr;
  min-height: calc(100vh - 76px);
}
.sim-sidebar {
  border-right: 1px solid var(--hairline);
  padding: 16px 20px 40px;
  overflow-y: auto;
  max-height: calc(100vh - 76px);
  background: var(--paper);
}
.sim-sidebar h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-mid);
  margin: 0 0 10px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--rule);
}
.sim-workspace {
  padding: 14px 24px 40px;
  overflow-y: auto;
  max-height: calc(100vh - 76px);
}

/* --------------------------------------------------------------------------
   Parameter panel — collapsible groups
   -------------------------------------------------------------------------- */
details.group {
  margin-bottom: 8px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 6px;
}
details.group > summary {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
  padding: 6px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details.group > summary::-webkit-details-marker { display: none; }
details.group > summary::after        { content: '+'; font-family: var(--mono); color: var(--ink-soft); }
details.group[open] > summary::after  { content: '−'; }

/* --------------------------------------------------------------------------
   Parameter rows
   -------------------------------------------------------------------------- */
.param {
  display: grid;
  grid-template-columns: 1fr 72px;
  column-gap: 8px;
  row-gap: 3px;
  padding: 6px 0;
  align-items: center;
}
.param .label          { font-size: 12px; color: var(--ink); }
.param .label .unit    {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--ink-soft);
  letter-spacing: .04em;
  margin-top: 1px;
}
.param input[type=number] {
  width: 100%;
  padding: 3px 6px;
  font-family: var(--mono);
  font-size: 11.5px;
  border: 1px solid var(--hairline);
  background: var(--panel);
  color: var(--ink);
  border-radius: 2px;
  text-align: right;
}
.param .slider-row     { grid-column: 1 / -1; display: flex; align-items: center; gap: 6px; }
.param input[type=range] { flex: 1; accent-color: var(--ink); }
.param .range-labels   {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--ink-soft);
  margin-top: -2px;
  grid-column: 1 / -1;
}

/* GA-controlled parameter badge */
.param.ga-param .label::after {
  content: 'GA';
  display: inline-block;
  margin-left: 5px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .06em;
  color: var(--panel);
  background: var(--ink-soft);
  padding: 1px 4px;
  border-radius: 2px;
  vertical-align: middle;
}

/* --------------------------------------------------------------------------
   Derived values panel
   -------------------------------------------------------------------------- */
.derived {
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--paper-dark);
  border-radius: 2px;
  border-left: 3px solid var(--plac);
}
.derived h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 10.5px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-mid);
}
.derived table { width: 100%; font-family: var(--mono); font-size: 10.5px; border-collapse: collapse; }
.derived td    { padding: 2px 0; }
.derived td:first-child { color: var(--ink-mid); }
.derived td:last-child  { text-align: right; }

/* --------------------------------------------------------------------------
   Status line
   -------------------------------------------------------------------------- */
.status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0 10px;
  font-size: 12px;
  color: var(--ink-mid);
  font-family: var(--mono);
  border-bottom: 1px dotted var(--hairline);
  margin-bottom: 14px;
}
.status .dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ink-soft);
  margin-right: 7px;
  vertical-align: middle;
}
.status.running .dot { background: var(--warn); animation: pulse 900ms infinite; }
.status.done    .dot { background: var(--normal); }
.status.alarm   .dot { background: var(--danger); animation: pulse 700ms infinite; }
@keyframes pulse { 50% { opacity: .35; } }

/* --------------------------------------------------------------------------
   Alert banner
   -------------------------------------------------------------------------- */
.alert-banner {
  display: none;
  padding: 10px 14px;
  margin-bottom: 14px;
  background: #FBEBEA;
  border: 1px solid var(--danger);
  color: var(--danger);
  font-family: var(--mono);
  font-size: 12px;
}
.alert-banner.active { display: block; }
.alert-banner .ev    { margin-top: 2px; font-size: 11px; }

/* --------------------------------------------------------------------------
   Summary stat tiles
   -------------------------------------------------------------------------- */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--hairline);
  padding: 10px 12px;
  border-radius: 2px;
}
.stat .k   { font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-mid); font-family: var(--sans); }
.stat .v   { font-size: 18px; font-family: var(--mono); color: var(--ink); margin-top: 3px; }
.stat .sub { font-size: 10.5px; color: var(--ink-soft); font-family: var(--mono); margin-top: 2px; white-space: normal; line-height: 1.55; }
.stat.warn   .v { color: var(--warn); }
.stat.danger .v { color: var(--danger); }

.sect-head {
  grid-column: 1 / -1;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 10.5px;
  letter-spacing: .10em;
  text-transform: uppercase;
  color: var(--ink-mid);
  padding: 8px 0 5px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 2px;
}

/* --------------------------------------------------------------------------
   Chart cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  padding: 14px 18px 18px;
  margin-bottom: 16px;
}
.card h3    { font-family: var(--serif); font-weight: 500; font-size: 14.5px; margin: 0 0 3px; }
.card .cap  { font-family: var(--serif); font-style: italic; font-size: 11.5px; color: var(--ink-mid); margin-bottom: 10px; }
.plot-wrap  { position: relative; width: 100%; height: 240px; }
.plot-wrap.short { height: 200px; }
.plot-wrap.tall  { height: 300px; }

/* --------------------------------------------------------------------------
   Oscilloscope / Doppler scope card
   -------------------------------------------------------------------------- */
.scope-card {
  background: var(--doppler-bg);
  border: 1px solid #1A1F26;
  border-radius: 2px;
  padding: 14px 18px 18px;
  margin-bottom: 16px;
  color: #D8D2B8;
}
.scope-card h3  { font-family: var(--mono); font-weight: 500; font-size: 12px; color: #A39B70; margin: 0 0 3px; text-transform: uppercase; letter-spacing: .1em; }
.scope-card .cap{ font-family: var(--serif); font-style: italic; font-size: 11.5px; color: #7A7460; margin-bottom: 10px; }
.scope-machine  { display: grid; grid-template-columns: 1fr 200px; gap: 14px; align-items: stretch; }
.scope-plot     { position: relative; width: 100%; height: 300px; background: #06090D; border: 1px solid #1A1F26; }
.scope-meta     { font-family: var(--mono); font-size: 11px; color: #A39B70; display: flex; flex-direction: column; gap: 4px; padding: 6px 0; }
.scope-meta .row{ display: flex; justify-content: space-between; border-bottom: 1px dotted #2A2C30; padding: 3px 0; }
.scope-meta .row .k { color: #7A7460; }
.scope-meta .row .v { color: #D8D2B8; }
.scope-meta .heading{ color: #E8DC8A; font-weight: 500; text-transform: uppercase; letter-spacing: .1em; font-size: 10px; margin-top: 6px; margin-bottom: 2px; border-bottom: 1px solid #2A2C30; padding-bottom: 2px; }

/* --------------------------------------------------------------------------
   Doppler classification banner
   -------------------------------------------------------------------------- */
.classification {
  background: var(--panel);
  border: 1px solid var(--rule);
  padding: 14px 18px;
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
}
.classification .icon  { font-size: 30px; font-family: var(--mono); font-weight: 500; line-height: 1; }
.classification .label { font-family: var(--serif); font-size: 16px; font-weight: 500; }
.classification .desc  { font-family: var(--serif); font-style: italic; font-size: 12px; color: var(--ink-mid); margin-top: 3px; }
.classification .ref   { font-family: var(--mono); font-size: 11px; color: var(--ink-mid); text-align: right; }
.classification.normal   { border-color: var(--normal); } .classification.normal   .icon { color: var(--normal); }
.classification.elevated { border-color: var(--warn);   } .classification.elevated .icon { color: var(--warn); }
.classification.aedv     { border-color: var(--danger);  } .classification.aedv     .icon { color: var(--danger); }
.classification.redv     { border-color: var(--danger); background: #FBEBEA; } .classification.redv .icon { color: var(--danger); }

/* --------------------------------------------------------------------------
   Doppler indices table
   -------------------------------------------------------------------------- */
.idx-table { width: 100%; border-collapse: collapse; font-family: var(--sans); }
.idx-table th, .idx-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--hairline); }
.idx-table thead th {
  font-weight: 500; font-size: 11px; letter-spacing: .05em; text-transform: uppercase;
  color: var(--ink); background: var(--paper); border-bottom: 2px solid var(--rule);
  text-align: center; line-height: 1.3;
}
.idx-table .site-sub  { font-size: 9.5px; font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--ink-soft); font-family: var(--serif); font-style: italic; }
.idx-table th.site-prox { border-top: 3px solid #B89F0E; }
.idx-table th.site-mid  { border-top: 3px solid #4A8A9C; }
.idx-table th.site-dist { border-top: 3px solid #8C4570; }
.idx-table .rowlabel  { font-size: 11px; font-weight: 500; color: var(--ink-mid); letter-spacing: .05em; text-transform: uppercase; width: 80px; }
.idx-table .ref       { font-family: var(--mono); font-size: 11px; color: var(--ink-mid); background: var(--paper-dark); text-align: right; }
.idx-cell             { display: table-cell; padding: 8px 10px; text-align: center; font-family: var(--mono); font-size: 16px; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--hairline); }
.idx-cell.warn   { color: var(--warn); }
.idx-cell.danger { color: var(--danger); font-weight: 600; }
.idx-cell.normal { color: var(--normal); }

/* --------------------------------------------------------------------------
   Circuit detail tiles
   -------------------------------------------------------------------------- */
.ctiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.ctile  { background: var(--panel); border: 1px solid var(--hairline); border-radius: 2px; padding: 10px 12px; }
.ctile h4 { font-family: var(--serif); font-size: 10px; font-weight: 500; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-mid); margin: 0 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--hairline); }
.ctile .crow { display: flex; justify-content: space-between; align-items: baseline; font-family: var(--mono); font-size: 10.5px; padding: 2.5px 0; border-bottom: 1px dotted var(--hairline); }
.ctile .crow:last-child { border-bottom: none; padding-bottom: 0; }
.ctile .ck { color: var(--ink-mid); font-size: 10px; letter-spacing: .02em; }
.ctile .cv { color: var(--ink); font-weight: 500; white-space: nowrap; margin-left: 6px; }
.ctile .cv.warn   { color: var(--warn); }
.ctile .cv.danger { color: var(--danger); }
.ctile .cv.normal { color: var(--normal); }
.ctile .divider   { font-family: var(--serif); font-size: 9px; font-style: italic; color: var(--ink-soft); margin: 4px 0 2px; border-top: 1px solid var(--hairline); padding-top: 4px; }

/* --------------------------------------------------------------------------
   Cardiac output fraction bar
   -------------------------------------------------------------------------- */
.frac-bar-wrap   { display: flex; align-items: center; gap: 5px; margin: 5px 0 3px; }
.frac-bar        { flex: 1; height: 7px; background: var(--hairline); border-radius: 3px; overflow: hidden; position: relative; }
.frac-bar-fill   { height: 100%; border-radius: 3px; transition: width 200ms; }
.frac-bar-fill.plac  { background: var(--plac); }
.frac-bar-fill.other { background: var(--ink-soft); }
.frac-bar-labels { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 9px; color: var(--ink-soft); margin-bottom: 4px; }

/* --------------------------------------------------------------------------
   View toggle (scope / full)
   -------------------------------------------------------------------------- */
.view-toggle-row   { display: flex; align-items: center; gap: 8px; padding: 2px 0 8px; }
.view-toggle-label { font-family: var(--sans); font-size: 11.5px; color: var(--ink-mid); }
.view-btn { font-family: var(--mono); font-size: 11px; padding: 3px 13px; border: 1px solid var(--hairline); border-radius: 99px; background: transparent; color: var(--ink-mid); cursor: pointer; }
.view-btn.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* Zoom slider */
.zoom-controls { display: flex; align-items: center; gap: 12px; margin-top: 8px; font-size: 11px; font-family: var(--mono); color: var(--ink-mid); }
.zoom-controls input[type=range] { flex: 1; accent-color: var(--ink-mid); }

/* --------------------------------------------------------------------------
   Portal — simulator card grid
   -------------------------------------------------------------------------- */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 32px 36px;
}
.sim-card {
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  padding: 20px 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 150ms, box-shadow 150ms;
}
.sim-card:hover:not(.sim-card--disabled) { border-color: var(--ink-mid); box-shadow: 0 2px 8px rgba(26,24,22,.08); }
.sim-card--disabled { opacity: .55; cursor: default; }
.sim-card .card-icon { font-size: 26px; font-family: var(--mono); color: var(--ink-mid); line-height: 1; }
.sim-card .card-title{ font-family: var(--serif); font-weight: 500; font-size: 15px; color: var(--ink); }
.sim-card .card-desc { font-family: var(--sans); font-size: 12px; color: var(--ink-mid); line-height: 1.5; flex: 1; }
.sim-card .card-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 4px; }

/* Status badges */
.badge { display: inline-flex; align-items: center; gap: 5px; font-family: var(--mono); font-size: 10px; letter-spacing: .06em; padding: 2px 8px; border-radius: 99px; }
.badge--live    { background: #D6EFE5; color: #0A5C3A; }
.badge--soon    { background: var(--paper-dark); color: var(--ink-soft); }
.badge--maint   { background: #FEF3CD; color: #7A4F00; }
.badge--live::before  { content: '●'; font-size: 7px; }
.badge--soon::before  { content: '◌'; font-size: 9px; }
.badge--maint::before { content: '⚠'; font-size: 9px; }

/* --------------------------------------------------------------------------
   Toast notifications (inherited from common.css pattern)
   -------------------------------------------------------------------------- */
#toastContainer {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  font-family: var(--mono);
  font-size: 12px;
  padding: 10px 16px;
  border-radius: 2px;
  border-left: 3px solid;
  background: var(--panel);
  box-shadow: 0 2px 12px rgba(26,24,22,.18);
  animation: toast-in 200ms ease;
  pointer-events: auto;
}
.toast.success { border-color: var(--normal); color: var(--normal); }
.toast.error   { border-color: var(--danger); color: var(--danger); }
.toast.warning { border-color: var(--warn);   color: var(--warn); }
.toast.info    { border-color: var(--ink-soft); color: var(--ink-mid); }
@keyframes toast-in { from { opacity: 0; transform: translateX(12px); } to { opacity: 1; transform: none; } }

/* --------------------------------------------------------------------------
   Utility
   -------------------------------------------------------------------------- */
.hidden { display: none !important; }
.mono   { font-family: var(--mono); }
.serif  { font-family: var(--serif); }
.muted  { color: var(--ink-soft); }