/* ══════════════════════════════════════════════════════════════════════════
   VENTILATOR PAGE  —  site shell matches Interactive Pyxis (light theme);
   monitor / ventilator UI stays dark for clinical realism.
   ══════════════════════════════════════════════════════════════════════════ */

/* Always reserve scrollbar gutter on the viewport so appearing/disappearing
   scrollbars never cause a layout reflow that resizes grid columns */
html { scrollbar-gutter: stable; }

/* ── Page shell (same neutrals as styles.css body) ───────────────────────── */
.vent-page {
  background: var(--bg-page);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(13, 148, 136, 0.05), transparent),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(99, 102, 241, 0.04), transparent);
  min-height: 100vh;
  color: var(--text-primary);
}
.vent-page a.site-nav__tab {
  text-decoration: none;
}

/* ── Workstation container ───────────────────────────────────────────────── */
.vent-workstation {
  max-width: 1380px;
  width: 100%;
  box-sizing: border-box; /* max-width includes padding, prevents overflow > viewport */
  min-width: 0;           /* prevents flex-child min-content expansion */
  margin: 0 auto;
  padding: 1.25rem 1.25rem 2rem;
  overflow-x: hidden;     /* clip any residual horizontal overflow without scroll */
}

/* ── Alarm banner ────────────────────────────────────────────────────────── */
.vent-alarm-banner {
  margin-bottom: 0.6rem;
  min-height: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
  max-width: 1055px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Workstation grid: vitals | BIS+vent | controls ─────────────────────── */
/* All three columns are fixed-width so no column can ever recompute its size
   in response to content changes, scrollbar presence, or page state changes.
   width: max-content shrinks the grid to exactly its columns; margin: 0 auto centers it. */
.workstation-grid {
  display: grid;
  grid-template-columns: 420px 345px 270px;
  gap: 10px;
  align-items: stretch;
  width: max-content;
  margin: 0 auto 10px;
}

/* ── Monitor shell — light chassis; .mon-screen = black display (waveforms match canvas #000) ─ */
.mon-shell {
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.mon-bezel {
  padding: 8px;
  background: #eef0f4;
}
.mon-brand {
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 5px;
  padding-left: 2px;
}
.mon-screen {
  background: #000000;
  border-radius: 6px;
  border: none;
  /* Inset edge — avoids a harsh outer ring on black next to the light bezel */
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

/* ══════════════════════════════════════════════════════════════════════════
   VITALS MONITOR
   ══════════════════════════════════════════════════════════════════════════ */

/* Stretch vitals to match mid-col height; rounder corners on this monitor only */
.mon-shell--vitals {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
}
.mon-shell--vitals .mon-bezel { flex: 1; display: flex; flex-direction: column; }
.mon-shell--vitals .mon-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-top: 4px;
  overflow: hidden;
  border-radius: var(--radius-md);
}
/* Wave rows stay fixed height; vitals-bar grows to fill any remaining space */
.mon-shell--vitals .vitals-bar {
  flex: 1;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* Waveform row */
.wave-row {
  display: flex;
  align-items: stretch;
  height: 96px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.wave-tag {
  width: 34px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.wave-canvas {
  flex: 1;
  display: block;
  min-width: 0;
  height: 96px;
  background: #000000;
}
.wave-num {
  width: 94px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  padding: 4px 6px 4px 2px;
  gap: 1px;
}
/* Extra inset so HR / BP / SpO₂ / EtCO₂ numerics aren’t flush to the monitor edge */
.mon-shell--vitals .wave-num {
  padding-right: 12px;
}
.wn-big {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.wn-sub {
  font-size: 12.5px;
  font-weight: 500;
  opacity: 0.85;
  font-variant-numeric: tabular-nums;
}
.wn-unit {
  font-size: 8.5px;
  opacity: 0.45;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 1px;
}
.wn-rr {
  font-size: 11px;
  opacity: 0.65;
  margin-top: 3px;
}
.wn-st {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0;
  margin-top: 2px;
}
.wn-st span {
  font-size: 8.5px;
  opacity: 0.5;
  font-variant-numeric: tabular-nums;
}

/* Space between EtCO₂ strip and NIBP / temp / gas bar (black “breathing room”) */
.mon-shell--vitals .mon-screen > .wave-row:nth-last-child(2) {
  margin-bottom: 10px;
}

/* Vitals bottom bar — fills remaining monitor height; cells stretch equally */
.vitals-bar {
  display: flex;
  gap: 5px;
  padding: 6px;
  background: #e8ecf2;
  align-items: stretch;
  min-height: 5.5rem;
}
.vb-cell {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 6px 8px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-subtle);
  border-radius: 5px;
}
.vb-label {
  font-size: 8px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.vb-val {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.vb-val--red { color: #ff7070; }
.vb-map { font-size: 11px; color: #ff7070; opacity: 0.8; }
.vb-unit { font-size: 8px; color: var(--text-muted); margin-top: 1px; }
.vb-gas-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  line-height: 1.5;
}
.vbg-k { color: var(--text-muted); }
.vbg-v { color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; }

/* ── Middle column (BIS + Vent stacked) ─────────────────────────────────── */
.mid-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ── Controls column (right) ─────────────────────────────────────────────── */
.ctrl-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ══════════════════════════════════════════════════════════════════════════
   BIS MONITOR
   ══════════════════════════════════════════════════════════════════════════ */
.mon-shell--bis .mon-screen { padding: 6px 8px 4px; }

.bis-top {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 2px;
}
.bis-left { flex-shrink: 0; }

/* BIS tutorial trigger (matches vitals ▶ Learn pattern) */
.bis-trig {
  appearance: none;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 2px 4px;
  margin: -2px -4px;
  border-radius: 6px;
  transition: background 0.18s;
  font: inherit;
  color: inherit;
  text-align: left;
}
.bis-trig:hover { background: rgba(13, 148, 136, 0.08); }
.bis-trig-hint {
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.06em;
  opacity: 0;
  color: var(--text-muted);
  transition: opacity 0.18s;
  margin-top: 3px;
}
.bis-trig:hover .bis-trig-hint { opacity: 1; }

.bis-num {
  font-size: 54px;
  font-weight: 700;
  color: #00e676;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 18px rgba(0, 230, 118, 0.35);
}
.bis-label {
  font-size: 9px;
  letter-spacing: 0.18em;
  color: #00e676;
  opacity: 0.8;
  text-transform: uppercase;
}
.bis-meta { font-size: 8.5px; color: #94a3b8; margin-top: 2px; }
.bis-right { flex: 1; min-width: 0; }
.bis-eeg-tag {
  font-size: 8.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #8b9aab;
  margin-bottom: 1px;
  line-height: 1.1;
}
#canvas-eeg { display: block; width: 100%; background: #000000; }

.bis-spectral-wrap { position: relative; margin-top: 0; }
#canvas-spectral { display: block; width: 100%; background: #000000; }
.bis-spectral-trig {
  display: block;
  width: 100%;
  margin-top: 2px;
  padding: 3px 6px;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(13, 148, 136, 0.08);
  border: 1px solid rgba(13, 148, 136, 0.25);
  border-radius: 5px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s, border-color 0.15s;
}
.bis-spectral-trig:hover {
  background: rgba(13, 148, 136, 0.14);
  border-color: rgba(13, 148, 136, 0.4);
}
.spectral-axis {
  display: flex;
  justify-content: space-around;
  font-size: 8.5px;
  color: #8b9aab;
  margin-top: 1px;
  letter-spacing: 0.04em;
  line-height: 1.15;
}

/* ══════════════════════════════════════════════════════════════════════════
   VENTILATOR MONITOR
   ══════════════════════════════════════════════════════════════════════════ */
/* Column flex so the mode bar spans the full inner width of the screen */
.mon-shell--vent .mon-screen {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 6px 0 0;
}

.vent-top { display: flex; gap: 6px; padding: 0 6px; flex: 0 0 auto; }

/* Vent waveforms */
.vent-waves { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.vent-wave-row { display: flex; align-items: center; gap: 4px; }
.vent-wave-lbl {
  width: 38px;
  flex-shrink: 0;
  font-size: 8px;
  font-weight: 700;
  text-align: center;
  line-height: 1.3;
}
.vent-wave-lbl small { font-size: 7px; opacity: 0.7; font-weight: 500; }
#canvas-pressure, #canvas-flow, #canvas-volume {
  flex: 1;
  display: block;
  min-width: 0;
  background: #000000;
}

/* Vent numerics */
.vent-nums {
  width: 88px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.vn-pair { display: flex; gap: 2px; }
.vn-cell {
  flex: 1;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 2px 3px;
  text-align: center;
}
.vn-lbl { font-size: 6.5px; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; }
.vn-val { font-size: 13px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; line-height: 1.1; }
.vn-val--warn { color: #c9a000; }
.vn-unit { font-size: 6px; color: var(--text-muted); }

/* ── P-V Loop row ────────────────────────────────────────────────────────── */
.vent-pv-row {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
  margin: 5px 6px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 5px;
}
.vent-pv-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 38px;
  flex-shrink: 0;
  font-size: 8px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}
.vent-pv-sublabel { font-size: 7px; font-weight: 500; opacity: 0.6; }
#canvas-pv { flex: 1; display: block; min-width: 0; background: #000000; }
.pv-legend {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}
.pv-leg-item { font-size: 8px; font-weight: 600; }

.vent-mode-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  flex-shrink: 0;
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  padding: 7px 8px;
  background: #e8ecf2;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0 0 5px 5px;
}
.vent-wave-tut-trig {
  margin-left: auto;
  flex-shrink: 0;
  padding: 3px 8px;
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(13, 148, 136, 0.1);
  border: 1px solid rgba(13, 148, 136, 0.28);
  border-radius: 5px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s, border-color 0.15s;
}
.vent-wave-tut-trig:hover {
  background: rgba(13, 148, 136, 0.16);
  border-color: rgba(13, 148, 136, 0.42);
}
.mode-chip {
  background: var(--accent);
  color: #fff;
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border-radius: 3px;
  text-transform: uppercase;
}
.mode-detail { font-size: 8.5px; color: var(--text-muted); font-variant-numeric: tabular-nums; }

/* ══════════════════════════════════════════════════════════════════════════
   CONTROLS
   ══════════════════════════════════════════════════════════════════════════ */
/* ── Intro card (matches .site-header__card on index) ─────────────────────── */
.vent-intro-card {
  max-width: 680px;
  margin: 0 auto 10px;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(18, 30, 45, 0.1);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2.5rem;
  box-shadow: 0 4px 24px rgba(18, 30, 45, 0.07), 0 1px 0 rgba(255, 255, 255, 0.8) inset;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-align: center;
}
.vent-intro-card h1 {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  letter-spacing: -0.02em;
}
.vent-intro-card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0.55rem auto 0;
  max-width: 860px;
}
.vent-intro-card__accent {
  color: var(--accent);
}

/* ── Floating AI button ─────────────────────────────────────────────────── */
.vent-ai-btn {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 18px;
  background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent) 100%);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: none;
  border-radius: 22px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(13, 148, 136, 0.35), 0 2px 8px rgba(18, 30, 45, 0.12);
  transition: transform 0.15s, box-shadow 0.15s;
  z-index: 200;
}
.vent-ai-btn:hover { transform: scale(1.04); box-shadow: 0 6px 28px rgba(13, 148, 136, 0.45); }
.vent-ai-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
  box-shadow: 0 0 6px #4ade80;
}
.ctrl-card {
  background: var(--bg-elevated);
  border: 1px solid var(--panel-border);
  border-radius: 11px;
  padding: 12px 14px;
  min-width: 0;     /* prevent grid blowout from long label text */
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.65) inset;
}
.ctrl-card--alarms { }
.ctrl-card__title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

/* Mode toggle */
.mode-toggle { display: flex; gap: 6px; margin-bottom: 10px; }
.mode-btn {
  flex: 1;
  padding: 5px 8px;
  border: 1.5px solid var(--border-subtle);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition);
}
.mode-btn:hover { border-color: var(--accent); color: var(--accent); }
.mode-btn--on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Sliders */
.ctrl-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.ctrl-lbl { font-size: 10px; color: var(--text-muted); flex: 1; min-width: 0; word-break: break-word; }
.ctrl-range {
  width: 96px;
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
.ctrl-val {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  width: 34px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Alarm list */
.alarm-list { display: flex; flex-direction: column; gap: 4px; }
.alarm-none { font-size: 10px; color: var(--text-muted); text-align: center; padding: 12px 0; }
.alarm-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 7px;
  border-radius: 5px;
  font-size: 10.5px;
  font-weight: 600;
  line-height: 1.3;
  animation: alarm-flash 1.8s ease infinite;
}
.alarm-item--high {
  background: rgba(255, 55, 55, 0.12);
  color: #ff6060;
  border-left: 3px solid #ff3333;
  animation-duration: 0.9s;
}
.alarm-item--medium {
  background: rgba(255, 165, 0, 0.10);
  color: #ffaa44;
  border-left: 3px solid #ff8800;
}
.alarm-item--low {
  background: rgba(0, 160, 255, 0.10);
  color: #44aaff;
  border-left: 3px solid #0088ff;
}
@keyframes alarm-flash {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.65; }
}

/* ══════════════════════════════════════════════════════════════════════════
   CLINICAL SCENARIOS
   ══════════════════════════════════════════════════════════════════════════ */

.scenario-trigger-row {
  margin-top: 12px;
  max-width: 1055px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  justify-content: center;
}
.scenario-trigger-btn {
  background: #fff;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 28px;
  border-radius: 8px;
  cursor: pointer;
  letter-spacing: 0.03em;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(18, 30, 45, 0.06);
}
.scenario-trigger-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-hover);
  box-shadow: 0 4px 18px rgba(13, 148, 136, 0.15);
}

/* Scenario panel */
.scenario-panel {
  max-width: 1055px;
  margin: 12px auto 0;
  background: var(--bg-elevated);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  overflow: hidden;
  animation: scen-slide-in 0.25s ease;
  box-shadow: var(--shadow-soft);
}
@keyframes scen-slide-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scenario selector */
#scen-select { padding: 18px 20px 16px; }
.scen-select__header {
  position: relative;
  margin-bottom: 16px;
  text-align: center;
}
.scen-select__header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 5px;
}
.scen-select__header p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 auto;    /* center the block so text-align: center works as expected */
  max-width: 700px;
}
.scen-close-btn {
  position: absolute;
  top: 0;
  right: 0;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 13px;
  border-radius: 5px;
  padding: 3px 8px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition);
}
.scen-close-btn:hover { color: var(--accent); border-color: rgba(13, 148, 136, 0.35); }

.scen-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.scen-card {
  min-width: 0;
  background: rgba(255, 255, 255, 0.85);
  border: 1.5px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px 16px;
  cursor: pointer;
  transition: var(--transition);
}
.scen-card:hover {
  border-color: rgba(13, 148, 136, 0.35);
  background: #fff;
  box-shadow: 0 4px 20px rgba(18, 30, 45, 0.08);
  transform: translateY(-2px);
}
.scen-card__badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 8px;
}
.scen-card__title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.3;
}
.scen-card__summary {
  font-size: 10.5px;
  color: var(--text-muted);
  line-height: 1.55;
}
.scen-card__cta {
  margin-top: 10px;
  font-size: 10px;
  color: var(--accent);
  font-weight: 600;
}

/* Active scenario */
#scen-active { padding: 14px 20px 16px; }
.scen-active__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}
.scen-active__left { display: flex; align-items: center; gap: 10px; }
.scen-active__right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.scen-badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 3px;
}
.scen-title { font-size: 14px; font-weight: 700; color: var(--text-primary); }
.scen-step-label { font-size: 10px; color: var(--text-muted); }

/* Phase badge — visual state indicator for the current scenario step */
.scen-phase {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 10px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.scen-phase--deterioration {
  background: rgba(255,70,70,0.14);
  color: #ff7070;
  border: 1px solid rgba(255,70,70,0.30);
}
.scen-phase--intervention {
  background: rgba(80,180,255,0.14);
  color: #64c8ff;
  border: 1px solid rgba(80,180,255,0.30);
}
.scen-phase--stabilization {
  background: rgba(60,220,110,0.14);
  color: #50dc78;
  border: 1px solid rgba(60,220,110,0.30);
}
.scen-phase--active {
  background: rgba(180,140,255,0.14);
  color: #c8a0ff;
  border: 1px solid rgba(180,140,255,0.30);
}

/* Monitor clue box — highlights key diagnostic pattern for the student */
.scen-monitor-clue {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(13, 148, 136, 0.2);
  border-radius: 8px;
  padding: 9px 13px;
  font-size: 11px;
  color: var(--text-primary);
  line-height: 1.6;
}
.scen-clue-icon {
  font-size: 0.9rem;
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 1px;
}
.scen-exit-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 11px;
  border-radius: 5px;
  padding: 4px 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition);
}
.scen-exit-btn:hover { color: #c44; border-color: rgba(204, 68, 68, 0.45); }

.scen-active__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  grid-template-rows: auto auto;
  gap: 12px 16px;
  align-items: start;
}
/* Context: left column, top row
   Clue:    left column, bottom row
   QA:      right column, spans both rows */
.scen-context      { grid-column: 1; grid-row: 1; }
.scen-monitor-clue { grid-column: 1; grid-row: 2; }
.scen-qa           { grid-column: 2; grid-row: 1 / span 2; }

.scen-context {
  background: rgba(13, 148, 136, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.65;
}
.scen-context strong { color: var(--accent); }

/* Question + choices */
.scen-qa { }
.scen-question {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.55;
  margin-bottom: 12px;
}
.scen-choices { display: flex; flex-direction: column; gap: 6px; }
.scen-choice {
  background: rgba(255, 255, 255, 0.9);
  border: 1.5px solid var(--border-subtle);
  border-radius: 7px;
  padding: 9px 12px;
  cursor: pointer;
  font-size: 11px;
  color: var(--text-muted);
  text-align: left;
  font-family: var(--font-sans);
  line-height: 1.45;
  transition: var(--transition);
  width: 100%;
}
.scen-choice:hover:not(:disabled) {
  border-color: rgba(13, 148, 136, 0.35);
  color: var(--text-primary);
  background: var(--accent-soft);
}
.scen-choice--correct {
  border-color: #00c870 !important;
  background: rgba(0, 200, 112, 0.10) !important;
  color: #00e676 !important;
}
.scen-choice--wrong {
  border-color: #883333 !important;
  background: rgba(255, 60, 60, 0.08) !important;
  color: #ff7070 !important;
}
.scen-choice:disabled { cursor: default; }

/* Feedback card */
.scen-feedback {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 11px;
  line-height: 1.65;
}
.scen-feedback--correct {
  background: rgba(0, 200, 112, 0.1);
  border-left: 3px solid #00c870;
  color: #1a6b45;
}
.scen-feedback--wrong {
  background: rgba(255, 80, 80, 0.08);
  border-left: 3px solid #ff4444;
  color: #b03030;
}
.scen-next-btn {
  margin-top: 12px;
  padding: 8px 20px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: var(--transition);
}
.scen-next-btn:hover { background: #3080d8; }

/* Resolution screen */
#scen-resolution {
  padding: 32px 20px;
  text-align: center;
}
.scen-resolution__icon {
  font-size: 40px;
  color: #00e676;
  margin-bottom: 12px;
}
#scen-resolution h3 { font-size: 1rem; color: var(--text-primary); margin: 0 0 10px; }
#scen-resolution p { font-size: 11px; color: var(--text-muted); line-height: 1.7; max-width: 700px; margin: 0 auto 20px; }

/* Post-scenario actions: equal-width buttons, consistent gap */
.scen-resolution__actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
}
.scen-resolution__actions .scen-next-btn,
.scen-resolution__actions .mode-btn {
  width: 100%;
  margin-top: 0;
  min-height: 40px;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ══════════════════════════════════════════════════════════════════════════
   TRAIN-OF-FOUR — MINI CARD (ctrl-col)
   ══════════════════════════════════════════════════════════════════════════ */

.ctrl-card--tof {
  cursor: pointer;
  user-select: none;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.ctrl-card--tof:hover,
.ctrl-card--tof:focus {
  border-color: #3060a8;
  box-shadow: 0 0 10px rgba(48, 96, 168, 0.25);
  outline: none;
}
.tof-card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.tof-mini-badge {
  font-size: 9px;
  font-weight: 700;
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 1px 7px;
  color: var(--accent);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}
.tof-mini-canvas {
  display: block;
  width: 100%;
  background: #000000;
  border-radius: 4px;
  margin: 6px 0 5px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.tof-mini-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tof-mini-hint {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}
.tof-mini-depth {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

/* Shared depth color classes (used in both mini card and modal) */
.tof-depth--ok       { color: #00e676; }
.tof-depth--mild     { color: #80e080; }
.tof-depth--moderate { color: #ffcc00; }
.tof-depth--deep     { color: #ff8040; }
.tof-depth--profound { color: #ff4444; }

/* ══════════════════════════════════════════════════════════════════════════
   TRAIN-OF-FOUR — FULL MODAL
   ══════════════════════════════════════════════════════════════════════════ */

.tof-modal {
  border: none;
  background: transparent;
  padding: 0;
  max-width: 100vw;
  max-height: 100vh;
  overflow: visible;
}
.tof-modal::backdrop {
  background: rgba(18, 30, 45, 0.35);
  backdrop-filter: blur(4px);
}
.tof-modal-inner {
  background: var(--bg-elevated);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  width: 740px;
  max-width: 96vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 12px 48px rgba(18, 30, 45, 0.14);
  font-family: var(--font-sans);
}
.tof-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.65);
}
.tof-device-brand {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: block;
}
.tof-device-sub {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 2px;
  display: block;
}
.tof-close-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  border-radius: 5px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-sans);
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}
.tof-close-btn:hover { color: #c44; border-color: rgba(204, 68, 68, 0.45); }

.tof-modal-body {
  display: grid;
  grid-template-columns: 1fr 258px;
  min-height: 0;
}

/* ── Left panel ──────────────────────────────────────────────────────────── */
.tof-left {
  padding: 14px 16px;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.tof-screen {
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  overflow: hidden;
}
.tof-screen canvas {
  display: block;
  width: 100%;
}
.tof-numerics {
  display: grid;
  grid-template-columns: 1fr 1fr 1.25fr;
  gap: 8px;
}
.tof-num-cell {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 8px 10px;
  text-align: center;
}
.tof-num-label {
  font-size: 8px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-bottom: 4px;
}
.tof-num-value {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.tof-num-cell--depth {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.tof-depth-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 5px;
  display: inline-block;
  white-space: nowrap;
}
.tof-depth-badge.tof-depth--ok       { background: rgba(0,230,118,0.12); }
.tof-depth-badge.tof-depth--mild     { background: rgba(128,224,128,0.12); }
.tof-depth-badge.tof-depth--moderate { background: rgba(255,204,0,0.12); }
.tof-depth-badge.tof-depth--deep     { background: rgba(255,128,64,0.12); }
.tof-depth-badge.tof-depth--profound { background: rgba(255,68,68,0.12); }

.tof-interp {
  background: var(--accent-soft);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
  min-height: 54px;
}

/* ── Right panel ─────────────────────────────────────────────────────────── */
.tof-right {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}
.tof-controls-section { display: flex; flex-direction: column; gap: 5px; }
.tof-section-title {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.tof-btns {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tof-btn {
  background: #fff;
  border: 1.5px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 10px;
  padding: 6px 9px;
  cursor: pointer;
  font-family: var(--font-sans);
  text-align: left;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.tof-btn:hover {
  border-color: var(--tof-btn-color, var(--accent));
  color: var(--text-primary);
  background: var(--accent-soft);
}
.tof-btn--active {
  border-color: var(--tof-btn-color, var(--accent)) !important;
  color: var(--tof-btn-color, var(--accent)) !important;
  background: var(--accent-soft) !important;
}

.tof-explainer {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 12px;
  flex-shrink: 0;
}
.tof-explainer-title {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin-bottom: 5px;
}
.tof-explainer-text {
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1.7;
}
.tof-explainer-text strong { color: var(--text-primary); }

/* ── Quiz ────────────────────────────────────────────────────────────────── */
.tof-quiz-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.tof-quiz { display: flex; flex-direction: column; gap: 4px; }
.tof-quiz-header {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 4px;
}
.tof-quiz-q {
  font-size: 10.5px;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.55;
  margin-bottom: 4px;
}
.tof-quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.tof-qchoice {
  background: #fff;
  border: 1.5px solid var(--border-subtle);
  border-radius: 5px;
  color: var(--text-muted);
  font-size: 10px;
  padding: 5px 9px;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  transition: border-color 0.13s, color 0.13s;
}
.tof-qchoice:hover:not(:disabled) { border-color: rgba(13, 148, 136, 0.35); color: var(--accent); }
.tof-qchoice--correct { border-color: #00c870 !important; color: #00e676 !important; background: rgba(0,200,112,0.07) !important; }
.tof-qchoice--wrong   { border-color: #883333 !important; color: #ff7070 !important; background: rgba(255,60,60,0.06) !important; }
.tof-qchoice:disabled { cursor: default; }
.tof-quiz-fb {
  margin-top: 5px;
  font-size: 10px;
  line-height: 1.6;
  padding: 7px 10px;
  border-radius: 5px;
}
.tof-quiz-fb--correct { background: rgba(0,200,112,0.1); border-left: 3px solid #00c870; color: #1a6b45; }
.tof-quiz-fb--wrong   { background: rgba(255,80,80,0.08); border-left: 3px solid #ff4444; color: #b03030; }
.tof-quiz-next {
  margin-top: 5px;
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 5px;
  color: var(--text-muted);
  font-size: 10px;
  padding: 5px 10px;
  cursor: pointer;
  font-family: var(--font-sans);
  width: 100%;
  transition: color 0.13s, border-color 0.13s;
}
.tof-quiz-next:hover { color: var(--accent); border-color: rgba(13, 148, 136, 0.35); }
.tof-quiz-done {
  font-size: 10.5px;
  color: #1a8a4a;
  padding: 8px;
  text-align: center;
}

/* ══════════════════════════════════════════════════════════════════════════
   MONITOR TUTORIAL MODALS
   ══════════════════════════════════════════════════════════════════════════ */

/* Clickable wave-num trigger */
.wave-num--trig {
  appearance: none;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 2px 4px;
  border-radius: 6px;
  transition: background 0.18s;
}
.wave-num--trig:hover { background: rgba(13, 148, 136, 0.08); }
.wn-trig-hint {
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.06em;
  opacity: 0;
  color: var(--text-muted);
  transition: opacity 0.18s;
  margin-top: 2px;
}
.wave-num--trig:hover .wn-trig-hint { opacity: 1; }

/* ── Dialog shell ─────────────────────────────────────────────────────────── */
.mon-tut {
  background: var(--bg-elevated);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  box-shadow: 0 12px 48px rgba(18, 30, 45, 0.14);
  padding: 0;
  width: min(720px, 96vw);
  max-height: 92vh;
  overflow: hidden;
  color: var(--text-primary);
}
.mon-tut--wide { width: min(940px, 96vw); }
.mon-tut::backdrop { background: rgba(18, 30, 45, 0.35); }

.mon-tut__inner {
  display: flex;
  flex-direction: column;
  max-height: 92vh;
  overflow-y: auto;
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.mon-tut__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.65);
  flex-shrink: 0;
}
.mon-tut__eyebrow {
  margin: 0 0 2px;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.mon-tut__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.mon-tut__close {
  appearance: none;
  background: rgba(18, 30, 45, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}
.mon-tut__close:hover { background: var(--accent-soft); color: var(--accent); }

/* ── Tabs ────────────────────────────────────────────────────────────────── */
.mon-tut__tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: #f1f4f8;
  flex-shrink: 0;
}
.mon-tut__tab {
  appearance: none; background: none; border: none;
  border-bottom: 2px solid transparent;
  padding: 9px 18px;
  font-size: 0.74rem; font-weight: 600;
  color: var(--text-muted); cursor: pointer;
  letter-spacing: 0.03em;
  transition: color 0.15s, border-color 0.15s;
}
.mon-tut__tab:hover { color: var(--text-primary); }
.mon-tut__tab--active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Waveform section ────────────────────────────────────────────────────── */
.mon-tut__wave-section {
  background: #000000;
  border-bottom: 1px solid var(--border-subtle);
  padding: 0;
  flex-shrink: 0;
}
.mon-tut__canvas {
  display: block;
  width: 100%;
  height: 160px;
  border-radius: 0;
  background: #000000;
}
.mon-tut--wide .mon-tut__canvas { height: 155px; }

/* ── Stats row (numerics + interp) ──────────────────────────────────────── */
.mon-tut__stats-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.75);
}
.mon-tut__nums {
  display: flex;
  flex-direction: column;
  gap: 5px;
  flex-shrink: 0;
  min-width: 130px;
}
.tut-nrow {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
}
.tut-nk { color: var(--text-muted); font-size: 0.68rem; min-width: 48px; }
.tut-nv { font-size: 1.1rem; font-weight: 700; }
.tut-nu { color: var(--text-muted); font-size: 0.62rem; }

.mon-tut__interp {
  flex: 1;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-muted);
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 8px 12px;
  align-self: stretch;
  display: flex;
  align-items: center;
}

/* Capno phase chips (basics tab) */
.mon-tut__capno-phases {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.cphs {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.04em;
}
.cphs--i   { background: rgba(13,148,136,0.12); color: var(--accent); border: 1px solid rgba(13,148,136,0.25); }
.cphs--ii  { background: rgba(255,200,50,0.12); color: #c8a840; border: 1px solid rgba(255,200,50,0.25); }
.cphs--iii { background: rgba(255,238,0,0.12);  color: #c8c030; border: 1px solid rgba(255,238,0,0.25); }
.cphs--down{ background: rgba(100,180,100,0.12);color: #70b070; border: 1px solid rgba(100,180,100,0.25); }

/* ── Selector row ────────────────────────────────────────────────────────── */
.mon-tut__selector-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-subtle);
  background: #f8fafc;
}
.mon-tut__select-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  flex-shrink: 0;
  white-space: nowrap;
}
.mon-tut__select {
  flex: 1;
  appearance: none;
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 7px 32px 7px 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2358687a'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color 0.15s, background-color 0.15s;
  max-width: 480px;
}
.mon-tut__select:hover { border-color: var(--accent); background-color: var(--accent-soft); }
.mon-tut__select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(13,148,136,0.2); }
.mon-tut__select option { background: #fff; color: var(--text-primary); }

/* ── Teaching section ────────────────────────────────────────────────────── */
.mon-tut__teach-section {
  padding: 12px 18px 14px;
  border-bottom: 1px solid var(--border-subtle);
}
.mon-tut__section-title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 8px;
}
.mon-tut__teach-list {
  margin: 0;
  padding-left: 1.1em;
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-muted);
}
.mon-tut__teach-list strong { color: var(--text-primary); }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.mon-tut__foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 10px 18px;
  background: #f1f4f8;
  flex-shrink: 0;
  border-top: 1px solid var(--border-subtle);
}
.mon-tut__foot-btn {
  appearance: none;
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 16px;
  transition: background 0.15s, color 0.15s;
}
.mon-tut__foot-btn:hover { background: var(--accent-soft); color: var(--accent); }
.mon-tut__foot-btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.mon-tut__foot-btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

/* ── Gas monitoring tab ──────────────────────────────────────────────────── */
.mon-tut__tab-panel { flex: 1; }

.mon-tut__gas-panel {
  display: flex;
  gap: 0;
}
.mon-tut__gas-traces {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-subtle);
}
.mon-tut__gas-row {
  display: flex;
  align-items: center;
  gap: 0;
  border-bottom: 1px solid var(--border-subtle);
  padding: 6px 10px 6px 0;
}
.mon-tut__gas-row:last-child { border-bottom: none; }
.mon-tut__gas-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  width: 44px;
  flex-shrink: 0;
  text-align: right;
  padding-right: 8px;
}
.mon-tut__gas-canvas {
  flex: 1;
  display: block;
  border-radius: 4px;
  height: 72px;
  background: #000000;
}
.mon-tut__gas-vals {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 115px;
  padding-left: 12px;
}
.mon-tut__gas-teach {
  width: 230px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
}

/* ── Volatile & O2 cards ─────────────────────────────────────────────────── */
.mon-tut__vol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 14px 18px;
}
.mon-tut__vol-card {
  background: var(--accent-soft);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 14px;
}
.mon-tut__vol-title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.mon-tut__vol-card p {
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin: 0 0 6px;
}
.mon-tut__vol-card p:last-child { margin-bottom: 0; }
.mon-tut__vol-card strong { color: var(--text-primary); }

/* BIS tutorial — link to spectral modal */
.mon-tut__bis-spectral-cta-text {
  margin: 0 0 10px;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
}
.mon-tut__bis-spectral-cta-text strong { color: var(--text-primary); }
.mon-tut__spectral-open {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(13, 148, 136, 0.35);
  border-radius: 8px;
  padding: 8px 14px;
  transition: background 0.15s, border-color 0.15s;
}
.mon-tut__spectral-open:hover {
  background: rgba(13, 148, 136, 0.18);
  border-color: var(--accent);
}

/* Interactive spectral heatmap modal */
.tut-spectral-dialog .tut-spectral__scenario-row {
  padding: 0 0 10px;
  margin: 0;
  border-bottom: none;
}
.tut-spectral__intro {
  margin: 0;
  padding: 10px 18px 0;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
}
.tut-spectral__intro strong { color: var(--text-primary); }
.tut-spectral__main {
  display: flex;
  gap: 0;
  padding: 12px 18px 0;
  align-items: flex-start;
}
/* Plot height locked so 4 label rows match 4 canvas rows (canvas is 160px). */
.tut-spectral__band-labels {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  width: 78px;
  height: 160px;
  box-sizing: border-box;
  border: 1px solid var(--border-subtle);
  border-right: none;
  border-radius: 8px 0 0 8px;
  overflow: hidden;
  background: rgba(18, 30, 45, 0.03);
}
.tut-spectral__band {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  appearance: none;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  background: transparent;
  cursor: pointer;
  padding: 4px 8px;
  text-align: left;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  line-height: 1.25;
  transition: background 0.12s, color 0.12s;
}
.tut-spectral__band:last-child { border-bottom: none; }
.tut-spectral__band:hover { background: var(--accent-soft); color: var(--text-primary); }
.tut-spectral__band--active {
  background: rgba(13, 148, 136, 0.12);
  color: var(--accent);
}
.tut-spectral__band-hz {
  display: block;
  font-size: 0.58rem;
  font-weight: 600;
  opacity: 0.85;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}
.tut-spectral__canvas-wrap {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  flex: 1;
  min-width: 0;
  height: 160px;
  box-sizing: border-box;
  border: 1px solid var(--border-subtle);
  border-radius: 0 8px 8px 0;
  overflow: hidden;
  background: #000;
}
.tut-spectral__hm-stage {
  position: relative;
  flex: 1;
  min-width: 0;
  min-height: 0;
}
.tut-spectral__canvas {
  display: block;
  width: 100%;
  height: 100%;
  vertical-align: top;
}
/* Unified power scale (matches JS colormap) */
.tut-spectral__colorbar {
  width: 22px;
  flex-shrink: 0;
  position: relative;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(
    to top,
    #030510 0%,
    #0f2864 16%,
    #0d6e8c 34%,
    #2fa86a 50%,
    #c4d020 68%,
    #ff9a1a 84%,
    #ffecd0 100%
  );
}
.tut-spectral__colorbar-hi,
.tut-spectral__colorbar-lo {
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 7px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 0 4px rgba(0, 0, 0, 0.95), 0 1px 2px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}
.tut-spectral__colorbar-hi { top: 4px; }
.tut-spectral__colorbar-lo { bottom: 4px; }
.tut-spectral__time-hint {
  position: absolute;
  right: 6px;
  bottom: 4px;
  z-index: 1;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.42);
  text-align: right;
  padding: 0;
  margin: 0;
  pointer-events: none;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.9);
}
.tut-spectral__panel {
  margin: 12px 18px 0;
  padding: 12px 14px 14px;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
  background: rgba(13, 148, 136, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
}
.tut-spectral__panel--scenario {
  margin-top: 10px;
}
.tut-spectral__panel-title {
  margin: 0 0 8px;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.tut-spectral__wave-text {
  margin: 0;
}
.tut-spectral__scenario-text {
  margin: 0;
  color: var(--text-primary);
  font-weight: 500;
}
.tut-spectral__panel strong { color: var(--text-primary); }
.tut-spectral__band-inline-label {
  display: inline;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--accent);
  margin-right: 0.35em;
}
.tut-spectral__footnote {
  margin: 10px 18px 16px;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--text-muted);
  font-style: italic;
}
.tut-spectral__footnote strong { font-style: normal; color: var(--text-primary); }
@media (max-width: 620px) {
  .tut-spectral__main { flex-direction: column; align-items: stretch; }
  .tut-spectral__band-labels {
    flex-direction: row;
    width: 100%;
    height: auto;
    min-height: 48px;
    border-radius: 8px 8px 0 0;
    border-right: 1px solid var(--border-subtle);
    border-bottom: none;
  }
  .tut-spectral__band {
    flex: 1;
    min-height: 44px;
    border-bottom: none;
    border-right: 1px solid var(--border-subtle);
    text-align: center;
    padding: 8px 4px;
  }
  .tut-spectral__band:last-child { border-right: none; }
  .tut-spectral__canvas-wrap {
    border-radius: 0 0 8px 8px;
    width: 100%;
    height: 160px;
  }
}

/* ── Ventilator waveforms & P–V tutorial ───────────────────────────────── */

/* Sized for aside + ~580px waveforms + padding */
.vent-tut-dialog.mon-tut {
  width: min(880px, calc(100vw - 32px));
  max-width: 100%;
  box-sizing: border-box;
}

.vent-tut-dialog > .mon-tut__inner {
  overflow-x: hidden;
}

/* Align header/footer with body gutters */
.vent-tut-dialog .mon-tut__head {
  padding-left: 22px;
  padding-right: 22px;
}
.vent-tut-dialog .mon-tut__foot {
  padding-left: 22px;
  padding-right: 22px;
}

.vent-tut-dialog .vent-tut__lead {
  margin: 0 0 0.85rem;
  padding: 12px 20px 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--text-muted);
  max-width: none;
}
.vent-tut-dialog .vent-tut__lead strong { color: var(--text-primary); font-weight: 600; }

.vent-tut__layout {
  display: grid;
  grid-template-columns: minmax(236px, 282px) minmax(0, 1fr);
  gap: 18px 22px;
  align-items: stretch;
  padding: 0 20px 12px;
  box-sizing: border-box;
  min-width: 0;
}

.vent-tut__aside {
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 14px 14px 12px;
  background: rgba(248, 250, 252, 0.92);
  overflow-x: hidden;
  overflow-y: auto;
  min-width: 0;
}

/* Preset row: stack label + full-width select (avoids crush vs mon-tut__selector-row default flex) */
.vent-tut__aside .vent-tut__preset-row.mon-tut__selector-row {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  border: none;
  background: transparent;
}
.vent-tut__aside .vent-tut__preset-row .mon-tut__select-label {
  white-space: normal;
  line-height: 1.3;
}
.vent-tut__aside .vent-tut__preset-row .mon-tut__select {
  width: 100%;
  max-width: none;
  box-sizing: border-box;
}

.vent-tut__preset-blurb {
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0 0 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  background: rgba(13, 148, 136, 0.07);
  border-radius: 0 8px 8px 0;
}
.vent-tut__preset-blurb strong { color: var(--text-primary); }

.vent-tut__mode {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}
.vent-tut__mode-btn {
  flex: 1;
  padding: 8px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  background: #fff;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.vent-tut__mode-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.vent-tut__mode-btn--on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Controls: label on its own row, slider + value row — fits narrow aside */
.vent-tut__ctrl-block .ctrl-row {
  flex-wrap: wrap;
  align-items: center;
  row-gap: 4px;
  column-gap: 10px;
  margin-bottom: 8px;
}
.vent-tut__ctrl-block .ctrl-row:last-child {
  margin-bottom: 0;
}
.vent-tut__ctrl-block .ctrl-lbl {
  flex: 1 0 100%;
  font-size: 10px;
  line-height: 1.35;
  margin: 0;
}
.vent-tut__ctrl-block .ctrl-range {
  flex: 1 1 auto;
  width: auto;
  min-width: 72px;
  max-width: 100%;
}
.vent-tut__ctrl-block .ctrl-val {
  flex: 0 0 38px;
  width: 38px;
}

.vent-tut__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.vent-tut__readouts {
  margin: 0 0 12px;
  padding: 10px 14px 10px;
  background: rgba(13, 148, 136, 0.06);
  border-radius: 10px;
  border: 1px solid rgba(13, 148, 136, 0.14);
  box-sizing: border-box;
  width: 100%;
}

.vent-tut__ro-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  line-height: 1.4;
}
.vent-tut__ro-table tr + tr td {
  border-top: 1px solid rgba(148, 163, 184, 0.12);
}
.vent-tut__ro-table td {
  padding: 5px 10px 5px 0;
  vertical-align: middle;
}
.vent-tut__ro-table td:nth-child(3) {
  padding-left: 18px;
  border-left: 1px solid rgba(148, 163, 184, 0.15);
}
.vent-tut__ro-k {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 500;
  white-space: nowrap;
  width: 1%;
}
.vent-tut__ro-v {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  white-space: nowrap;
}

.vent-tut__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 8px;
  padding: 6px 8px 0;
  margin: 0;
  background: rgba(241, 244, 248, 0.85);
  border: 1px solid var(--border-subtle);
  border-bottom: none;
  border-radius: 10px 10px 0 0;
  box-sizing: border-box;
}
.vent-tut__tab {
  padding: 8px 14px;
  font-size: 0.74rem;
  font-weight: 600;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-sans);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  border-radius: 6px 6px 0 0;
}
.vent-tut__tab:hover { color: var(--text-primary); }
.vent-tut__tab--active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: rgba(255, 255, 255, 0.65);
}

.vent-tut__panel[data-panel="waves"] {
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-top: none;
  border-radius: 0 0 10px 10px;
  overflow: hidden;
  background: #08080c;
}

.vent-tut__wave-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 18px 18px;
  box-sizing: border-box;
}
.vent-tut__wave-row {
  display: flex;
  align-items: stretch;
  gap: 12px;
  min-width: 0;
}
.vent-tut__wave-lbl {
  flex-shrink: 0;
  width: 48px;
  font-size: 9px;
  font-weight: 700;
  line-height: 1.25;
  text-align: right;
  padding-top: 6px;
}
.vent-tut__wave-lbl small { font-weight: 500; opacity: 0.8; font-size: 8px; }
.vent-tut__wave-row canvas {
  flex: 1;
  display: block;
  min-width: 0;
  width: 100%;
  max-width: 100%;
  height: auto;
  background: #000;
  border-radius: 6px;
}

.vent-tut__panel[data-panel="pv"] {
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-top: none;
  border-radius: 0 0 10px 10px;
  overflow: hidden;
  background: #08080c;
}

.vent-tut__pv-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 18px 20px 20px;
  box-sizing: border-box;
}
.vent-tut__pv-wrap canvas {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  background: #000;
  border-radius: 8px;
}
.vent-tut__pv-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(148, 163, 184, 0.95);
}
.vent-tut__dashed-note {
  margin: 8px 20px 0;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.45;
}

@media (max-width: 900px) {
  .vent-tut-dialog.mon-tut {
    width: min(100vw - 24px, 880px);
  }
  .vent-tut__layout {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 0 18px 4px;
  }
  .vent-tut-dialog .vent-tut__lead {
    padding: 14px 18px 0;
    max-width: none;
  }
  .vent-tut-dialog .mon-tut__head,
  .vent-tut-dialog .mon-tut__foot {
    padding-left: 18px;
    padding-right: 18px;
  }
  .vent-tut__aside {
    max-height: none;
    order: 2;
  }
  .vent-tut__main {
    order: 1;
  }
}

/* ── Debrief dialog ───────────────────────────────────────────────────── */

.debrief-dialog {
  border: none;
  border-radius: 14px;
  padding: 0;
  max-width: 640px;
  width: 92vw;
  max-height: 85vh;
  overflow-y: auto;
  background: #fff;
  box-shadow: 0 12px 48px rgba(0,0,0,.2);
  color: #1c2738;
}
.debrief-dialog::backdrop {
  background: rgba(0,0,0,.45);
}
.debrief-dialog__inner {
  padding: 1.6rem 1.8rem 1.4rem;
}

.debrief-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.debrief-dialog__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0;
  color: var(--accent);
}
.debrief-dialog__close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: #58687a;
  padding: 0;
  line-height: 1;
}

.debrief-dialog__summary {
  font-size: 0.88rem;
  line-height: 1.6;
  color: #1c2738;
  margin: 0 0 1.2rem;
  padding: 0.8rem 1rem;
  background: rgba(13,148,136,.06);
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.debrief-dialog__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.2rem;
}
.debrief-dialog__col { min-width: 0; }

.debrief-dialog__label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.5rem;
}
.debrief-dialog__label--good { color: #1a8a4a; }
.debrief-dialog__label--gap  { color: #c44; }

.debrief-dialog__list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.debrief-dialog__list li {
  font-size: 0.8rem;
  padding: 0.3rem 0;
  color: #1c2738;
}
.debrief-dialog__none {
  color: #999;
  font-style: italic;
}

/* Step detail row */
.debrief-dialog__steps {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
}
.debrief-step {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0.7rem;
  border-radius: 6px;
  font-size: 0.78rem;
}
.debrief-step--correct { background: rgba(26,138,74,.08); }
.debrief-step--wrong   { background: rgba(204,68,68,.08); }
.debrief-step__icon { font-weight: 700; }
.debrief-step--correct .debrief-step__icon { color: #1a8a4a; }
.debrief-step--wrong   .debrief-step__icon { color: #c44; }
.debrief-step__label { font-weight: 600; }
.debrief-step__time  { color: #58687a; }
.debrief-step__domains { color: #58687a; font-size: 0.72rem; margin-left: auto; }

/* Sections */
.debrief-dialog__section {
  margin-bottom: 1.2rem;
}
.debrief-dialog__teaching {
  padding-left: 1.2rem;
  margin: 0;
}
.debrief-dialog__teaching li {
  font-size: 0.82rem;
  line-height: 1.55;
  margin-bottom: 0.5rem;
  color: #1c2738;
}

/* Drill */
.debrief-dialog__drill-prompt {
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0 0 0.7rem;
  font-weight: 500;
}
.debrief-dialog__drill-choices {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.debrief-drill-btn {
  text-align: left;
  padding: 0.55rem 0.8rem;
  border: 1px solid rgba(18,30,45,.15);
  border-radius: 7px;
  background: #fff;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  color: #1c2738;
}
.debrief-drill-btn:hover:not(:disabled) {
  background: rgba(13,148,136,.06);
  border-color: var(--accent);
}
.debrief-drill-btn:disabled { opacity: 0.7; cursor: default; }
.debrief-drill-btn--correct {
  background: rgba(26,138,74,.12) !important;
  border-color: #1a8a4a !important;
  color: #1a8a4a;
  font-weight: 600;
}
.debrief-drill-btn--wrong {
  background: rgba(204,68,68,.1) !important;
  border-color: #c44 !important;
  color: #c44;
}

.debrief-dialog__drill-feedback {
  margin-top: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  line-height: 1.5;
}
.debrief-dialog__drill-feedback--correct {
  background: rgba(26,138,74,.08);
  color: #1a8a4a;
}
.debrief-dialog__drill-feedback--wrong {
  background: rgba(204,68,68,.07);
  color: #c44;
}

/* Sign-in prompt */
.debrief-dialog__signin-text {
  font-size: 0.78rem;
  color: #58687a;
  text-align: center;
  padding: 0.6rem;
  background: rgba(13,148,136,.04);
  border-radius: 6px;
}
.debrief-dialog__signin-text a {
  color: var(--accent);
  font-weight: 600;
}

.debrief-trigger {
  background: var(--accent) !important;
  color: #fff !important;
}