/* ===================================================================
   Tidal — ICU ventilator monitor aesthetic
   =================================================================== */
:root {
  --bg:        #0a0e14;
  --bg-panel:  #121822;
  --bg-panel2: #0d121b;
  --bg-scope:  #05070b;
  --border:    #232c3a;
  --border-lt: #2f3a4d;
  --text:      #c9d4e3;
  --text-dim:  #6f7e93;
  --text-bright:#eef3fa;
  --accent:    #2dd4bf;
  --accent-dim:#16887b;

  /* waveform channel colors (classic vent scheme) */
  --c-paw:  #ffd23f;   /* pressure  – yellow  */
  --c-flow: #35d07f;   /* flow      – green   */
  --c-vol:  #4cc7ff;   /* volume    – cyan    */
  --c-loop: #ff7ab6;   /* loops     – magenta */
  --c-effort:#9b8cff;  /* patient effort      */

  --warn:   #ff9f1c;
  --crit:   #ff4d4d;
  --good:   #35d07f;

  --mono: "SF Mono", "JetBrains Mono", "Roboto Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- Header ---------------- */
#topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 10px 18px;
  background: linear-gradient(180deg, #131a26, #0c121b);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { color: var(--accent); font-size: 22px; line-height: 1; transform: translateY(2px); }
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: .5px; color: var(--text-bright); }
.brand-sub { font-size: 11px; color: var(--text-dim); letter-spacing: .3px; white-space: nowrap; }
.topbar-status { display: flex; gap: 10px; margin-left: 6px; }
.status-chip {
  display: flex; flex-direction: column; padding: 4px 12px;
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 6px;
}
.status-chip label { font-size: 9px; color: var(--text-dim); letter-spacing: 1px; }
.status-chip span { font-size: 14px; font-weight: 600; color: var(--text-bright); font-family: var(--mono); white-space: nowrap; }
/* scenario dropdown, styled to read as a status chip */
.chip-select { padding-top: 3px; padding-bottom: 5px; transition: border-color .12s; }
.chip-select:hover { border-color: var(--accent-dim); }
.chip-select-wrap { position: relative; display: flex; align-items: center; }
#caseSelect {
  -webkit-appearance: none; -moz-appearance: none; appearance: none;
  background: transparent; border: 0; outline: none; margin: 0;
  padding: 0 15px 0 0; max-width: 248px;
  font-family: var(--mono); font-size: 14px; font-weight: 600;
  color: var(--text-bright); cursor: pointer; text-overflow: ellipsis;
}
#caseSelect optgroup { color: var(--text-dim); font-style: normal; }
#caseSelect option { color: var(--text); background: var(--bg-panel); font-weight: 500; }
.chip-caret { position: absolute; right: 0; font-size: 9px; color: var(--text-dim); pointer-events: none; }
/* Learn navigation chip — styled like a status chip, links to the study module */
a.chip-link { text-decoration: none; justify-content: center; transition: border-color .12s, background .12s; }
a.chip-link label { color: var(--accent); letter-spacing: 1px; cursor: pointer; }
a.chip-link span { color: var(--text-bright); }
a.chip-link:hover { border-color: var(--accent-dim); background: var(--bg-panel2); }
.transport { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.t-btn {
  background: var(--bg-panel); color: var(--text); border: 1px solid var(--border-lt);
  padding: 7px 14px; border-radius: 6px; cursor: pointer; font-size: 12px; font-weight: 600;
}
.t-btn:hover { border-color: var(--accent-dim); }
.t-btn.frozen { background: var(--warn); color: #1a1205; border-color: var(--warn); }
/* nav links styled as transport buttons (Learn ↔ Simulator) */
a.t-btn { text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
a.t-btn:hover { color: var(--text-bright); }
.speed-wrap { display: flex; align-items: center; gap: 6px; }
.speed-wrap label { font-size: 11px; color: var(--text-dim); }
.speed-wrap select, #settings select {
  background: var(--bg-panel2); color: var(--text); border: 1px solid var(--border-lt);
  border-radius: 5px; padding: 5px 7px; font-family: var(--mono); font-size: 12px;
}

/* ---------------- Layout ---------------- */
#layout {
  display: grid;
  grid-template-columns: 290px 1fr 250px;
  gap: 12px;
  padding: 12px;
  align-items: start;
}
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 13px;
  margin-bottom: 12px;
}
.panel-title {
  margin: 0 0 10px; font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  color: var(--accent); text-transform: uppercase;
}
.truth-tag {
  font-size: 8px; background: #3a2c12; color: var(--warn); padding: 2px 5px;
  border-radius: 4px; letter-spacing: .5px; margin-left: 4px; vertical-align: middle;
}

/* ---------------- Settings controls ---------------- */
.ctrl { margin-bottom: 11px; }
.ctrl.hidden, .ctrl-group-label.hidden, .ctrl-info.hidden { display: none; }
.ctrl-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 4px; }
.ctrl-label { font-size: 11px; color: var(--text-dim); letter-spacing: .3px; }
.ctrl-value { font-family: var(--mono); font-size: 14px; font-weight: 600; color: var(--text-bright); }
.ctrl-value small { font-size: 10px; color: var(--text-dim); font-weight: 400; margin-left: 2px; }
.ctrl input[type=range] {
  width: 100%; -webkit-appearance: none; appearance: none; height: 4px;
  background: var(--border-lt); border-radius: 3px; outline: none; margin: 4px 0 0;
}
.ctrl input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 15px; height: 15px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid #0a0e14;
}
.ctrl input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%; background: var(--accent); cursor: pointer; border: 2px solid #0a0e14;
}
.ctrl select { width: 100%; }
.seg {
  display: flex; gap: 0; border: 1px solid var(--border-lt); border-radius: 6px; overflow: hidden;
}
.seg button {
  flex: 1; background: var(--bg-panel2); color: var(--text-dim); border: none;
  padding: 7px 4px; cursor: pointer; font-size: 11px; font-weight: 600;
}
.seg button.active { background: var(--accent); color: #04110f; }
.seg.seg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; }
.seg.seg-grid button { padding: 8px 4px; border-right: 1px solid var(--border-lt); border-bottom: 1px solid var(--border-lt); }
.ctrl-group-label {
  font-size: 9px; letter-spacing: 1.5px; color: var(--text-dim); text-transform: uppercase;
  border-top: 1px dashed var(--border); padding-top: 9px; margin: 4px 0 8px;
}

/* ---------------- Maneuvers ---------------- */
.maneuvers { display: flex; gap: 8px; }
.m-btn {
  flex: 1; background: var(--bg-panel2); border: 1px solid var(--border-lt); color: var(--text);
  padding: 9px 6px; border-radius: 6px; cursor: pointer; font-size: 11px; font-weight: 600;
}
.m-btn:hover { border-color: var(--accent-dim); }
.m-btn.armed { background: var(--accent-dim); color: var(--text-bright); border-color: var(--accent); }
.maneuver-hint { font-size: 10px; color: var(--text-dim); margin: 8px 0 0; }

/* ---------------- Scope / waveforms ---------------- */
#centercol { min-width: 0; }
.alarm-bar {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 7px 14px; margin-bottom: 10px; font-family: var(--mono); font-size: 12px;
  color: var(--text-dim); letter-spacing: .3px;
}
.alarm-bar.warn { background: #2a1f08; border-color: var(--warn); color: var(--warn); }
.alarm-bar.crit { background: #2c0d0d; border-color: var(--crit); color: #ff8a8a; animation: pulse 1.1s infinite; }
@keyframes pulse { 50% { background: #491414; } }

.scope {
  background: var(--bg-scope); border: 1px solid var(--border); border-radius: 10px;
  padding: 6px 8px 6px 0; overflow: hidden;
}
.scope.measuring { cursor: crosshair; }
.wave-row { display: flex; align-items: stretch; height: 150px; position: relative; }
.wave-row + .wave-row { border-top: 1px solid #11161f; }
.wave-label {
  width: 58px; flex: 0 0 58px; display: flex; flex-direction: column; justify-content: center;
  align-items: flex-end; padding-right: 8px; gap: 1px;
}
.wl-title { font-size: 13px; font-weight: 700; font-family: var(--mono); }
.wl-unit { font-size: 9px; color: #6f7e93; } /* scope is always dark */
.wave-canvas { flex: 1; height: 100%; width: 100%; display: block; }

/* trigger-shade legend — the scope is always dark, so colours are fixed */
.scope-legend {
  display: flex; align-items: center; justify-content: flex-end; gap: 16px;
  padding: 8px 8px 2px 0; font-family: var(--mono); font-size: 10px;
  color: #7c8aa0; letter-spacing: .3px;
}
.scope-legend .lg-cap { text-transform: uppercase; letter-spacing: 1.2px; color: #5e6b7e; }
.scope-legend .lg-item { display: inline-flex; align-items: center; gap: 6px; }
.scope-legend .lg-item em { color: #9aa6b6; font-style: italic; }
.scope-legend .lg-swatch { width: 30px; height: 4px; border-radius: 2px; flex: 0 0 auto; }
/* vent = the three vivid channel colours; patient = their lighter shade (tint 0.45) */
.scope-legend .lg-swatch.lg-vent { background: linear-gradient(90deg, var(--c-paw), var(--c-flow), var(--c-vol)); }
.scope-legend .lg-swatch.lg-patient { background: linear-gradient(90deg, #ffe89f, #9ae7bf, #a5e3ff); }
@media (max-width: 460px) {
  .scope-legend { gap: 10px; font-size: 9px; }
  .scope-legend .lg-swatch { width: 22px; }
}

/* ---------------- Loops ---------------- */
.loops {
  margin-top: 12px; background: var(--bg-scope); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 10px;
}
.loop-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.loop-head > span { font-size: 11px; letter-spacing: 1px; color: #6f7e93; text-transform: uppercase; }
.loop-toggle { display: flex; gap: 4px; }
.lp-btn {
  background: #121822; border: 1px solid #2f3a4d; color: #6f7e93;
  padding: 4px 12px; border-radius: 5px; cursor: pointer; font-size: 11px; font-weight: 600;
}
.lp-btn.active { background: var(--c-loop); color: #2a0a1c; border-color: var(--c-loop); }
.loop-canvas { width: 100%; height: 240px; display: block; }

/* ---------------- Monitors ---------------- */
.mon-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mon {
  background: var(--bg-panel2); border: 1px solid var(--border); border-radius: 7px;
  padding: 7px 9px; min-width: 0;
}
.mon.full { grid-column: 1 / -1; }
.mon-label { font-size: 9px; color: var(--text-dim); letter-spacing: .6px; text-transform: uppercase; }
.mon-value { font-family: var(--mono); font-size: 20px; font-weight: 700; color: var(--text-bright); line-height: 1.15; }
.mon-value small { font-size: 10px; color: var(--text-dim); font-weight: 400; margin-left: 3px; }
.mon-value.warn { color: var(--warn); }
.mon-value.crit { color: var(--crit); }
.mon-value.stale { color: var(--text-dim); }

.instructor .mon-value { font-size: 16px; }

/* bedside patient monitor: conventional vital-sign colours */
.vital .mon-value { font-size: 19px; }
.vital.v-spo2 .mon-value { color: var(--c-vol); }
.vital.v-hr .mon-value   { color: var(--good); }
.vital.v-bp .mon-value   { color: #ff6b81; }
.vital.v-etco2 .mon-value { color: var(--c-paw); }
.vital .mon-value.warn { color: var(--warn); }
.vital .mon-value.crit { color: var(--crit); }
.abg-btn { width: 100%; margin-top: 8px; }
.abg { display: none; margin-top: 8px; background: var(--bg-panel2); border: 1px solid var(--border); border-radius: 7px; padding: 7px 9px; }
.abg.show { display: block; }
.abg-head { font-size: 9.5px; color: var(--text-dim); letter-spacing: .4px; margin-bottom: 5px; }
.abg-stale { display: none; color: var(--warn); margin-left: 6px; }
.abg.stale .abg-stale { display: inline; }
.abg.stale .abg-grid { opacity: .55; }
.abg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px 8px; }
.abg-grid div { display: flex; flex-direction: column; }
.abg-grid span { font-size: 9px; color: var(--text-dim); }
.abg-grid b { font-family: var(--mono); font-size: 14px; color: var(--text-bright); }
.abg-grid b.bad { color: var(--warn); }
.ctrl-info { font-size: 11px; color: var(--text-dim); margin: -2px 0 6px; line-height: 1.4; }
.ctrl-info b { color: var(--text); font-family: var(--mono); }

/* ---------------- Case strip: brief + targets ---------------- */
.case-panel {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 14px;
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 11px 14px; margin-bottom: 10px;
}
.case-titlebar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.case-titlebar h2 { margin: 0; font-size: 16px; color: var(--text-bright); }
.badge {
  font-size: 9px; letter-spacing: 1px; text-transform: uppercase; color: var(--accent);
  border: 1px solid var(--accent-dim); padding: 1px 7px; border-radius: 9px;
}
.badge.lvl { color: var(--text-dim); border-color: var(--border-lt); }
.case-link { margin-left: auto; font-size: 11px; color: var(--text-dim); text-decoration: none; }
.case-link:hover { color: var(--accent); }
.case-vignette { margin: 6px 0 0; font-size: 12.5px; color: var(--text); line-height: 1.45; }
.case-preset { margin: 4px 0 0; font-size: 11px; color: var(--warn); }
.case-preset:empty, .case-vignette:empty { display: none; }
.case-log { margin-top: 5px; font-size: 11px; font-family: var(--mono); }
.log-item { color: var(--text-dim); }
.log-item.event { color: var(--warn); }
.log-item.intervention { color: var(--accent); }
.log-t { color: var(--text-dim); margin-right: 4px; }
.case-goals { border-left: 1px solid var(--border); padding-left: 13px; }
.goals-head { display: flex; justify-content: space-between; font-size: 10px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-dim); margin-bottom: 5px; }
.goals-head b { font-family: var(--mono); color: var(--text-bright); letter-spacing: 0; }
.case-goals.all-met .goals-head b { color: var(--good); }
.goal-list { list-style: none; margin: 0; padding: 0; }
.goal { display: grid; grid-template-columns: 14px 1fr; column-gap: 6px; font-size: 11.5px; padding: 2px 0; color: var(--text); }
.goal .g-ico { font-weight: 800; color: var(--text-dim); }
.goal .g-val { grid-column: 2; font-family: var(--mono); font-size: 10px; color: var(--text-dim); }
.goal .g-val:empty { display: none; }
.goal.met .g-ico { color: var(--good); }
.goal.met .g-text { color: var(--text-bright); }
.goal.fail .g-ico { color: var(--crit); }
.goal.fail .g-val { color: var(--warn); }
.goal.measure .g-val { color: var(--accent); }
.goal.none { display: block; color: var(--text-dim); font-size: 11px; }

/* challenge flow (inside the case strip) */
.challenge-stage { display: none; margin-top: 9px; border-top: 1px dashed var(--border); padding-top: 9px; }
.challenge-stage.show { display: block; }
.stage-q { font-size: 12px; color: var(--text); margin-bottom: 7px; }
.stage-opts { display: flex; flex-wrap: wrap; gap: 6px; }
.stage-opt {
  background: var(--bg-panel2); border: 1px solid var(--border-lt); color: var(--text);
  border-radius: 6px; padding: 5px 9px; font-size: 11px; cursor: pointer;
}
.stage-opt:hover:not(:disabled) { border-color: var(--accent-dim); }
.stage-opt.wrong { border-color: var(--crit); color: var(--crit); opacity: .7; }
.stage-finish { font-size: 11px; padding: 5px 11px; }
.debrief-score { font-size: 13px; color: var(--text); }
.debrief-score b { font-family: var(--mono); font-size: 24px; color: var(--accent); }
.debrief-score small { color: var(--text-dim); }
.debrief-dx { font-size: 12.5px; margin: 4px 0 6px; }
.debrief h4 { margin: 8px 0 3px; font-size: 10px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-dim); }
.debrief ul { margin: 0; padding-left: 16px; font-size: 11.5px; }
.debrief-log { list-style: none; padding-left: 0 !important; font-family: var(--mono); font-size: 10.5px !important; }
.debrief-log li.event { color: var(--warn); }
.debrief-log li.intervention { color: var(--accent); }
.debrief-actions { display: flex; gap: 8px; margin-top: 10px; }
.challenge-btn { border-color: var(--accent-dim); color: var(--accent); }
/* in a challenge the patient's own drive is hidden too */
body.challenge-on #patientSettings [data-key="amp"],
body.challenge-on #patientSettings [data-key="neuralRate"] { display: none; }

/* overlay (challenge menu) */
.overlay { position: fixed; inset: 0; background: rgba(4, 7, 12, .66); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.overlay[hidden] { display: none; }
.overlay-card { background: var(--bg-panel); border: 1px solid var(--border-lt); border-radius: 12px; padding: 18px 20px; max-width: 460px; width: 100%; }
.overlay-card h3 { margin: 0 0 6px; color: var(--text-bright); }
.overlay-card p { font-size: 12.5px; color: var(--text); margin: 0 0 12px; }
.ch-pools { display: grid; gap: 8px; margin-bottom: 12px; }
.ch-pool {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left;
  background: var(--bg-panel2); border: 1px solid var(--border-lt); border-radius: 8px;
  padding: 9px 12px; color: var(--text); cursor: pointer;
}
.ch-pool:hover { border-color: var(--accent); }
.ch-pool b { color: var(--text-bright); font-size: 13px; }
.ch-pool span { font-size: 11px; color: var(--text-dim); }

/* interventions, truth & Pmus toggles */
.interventions { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.iv-btn { font-size: 10.5px; padding: 8px 4px; }
.mini-toggle {
  float: right; background: none; border: 1px solid var(--border-lt); border-radius: 5px;
  color: var(--text-dim); font-size: 9px; letter-spacing: .5px; padding: 1px 7px; cursor: pointer; text-transform: none;
}
.mini-toggle:disabled { opacity: .4; cursor: default; }
.truth-hidden .mon-value { filter: blur(6px); user-select: none; }
.scope-legend .lg-toggle { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; color: #9b8cff; }
.scope-legend .lg-toggle input { accent-color: #9b8cff; margin: 0; }
.hidden { display: none !important; }

/* ---------------- Teaching ---------------- */
.teaching { margin: 16px 12px; background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; }
.teaching-head { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.teaching-head h2 { margin: 0; font-size: 18px; color: var(--text-bright); }
.teach-cat { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent-dim); padding: 2px 9px; border-radius: 10px; }
.teach-desc { font-size: 13px; color: var(--text); margin: 0 0 14px; max-width: 880px; }
.teach-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.teach-cols h3 { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--text-dim); margin: 0 0 7px; }
.teach-cols ul { margin: 0; padding-left: 18px; }
.teach-cols li { font-size: 12.5px; margin-bottom: 6px; color: var(--text); }
.teach-cols li b { color: var(--text-bright); }

/* ---------------- Footer ---------------- */
#footer { padding: 14px 18px 26px; color: var(--text-dim); font-size: 11px; text-align: center; }
#footer strong { color: var(--warn); }

/* ---------------- Responsive ---------------- */
@media (max-width: 1180px) {
  #layout { grid-template-columns: 250px 1fr; }
  #rightcol { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
  #rightcol .panel { margin-bottom: 0; }
}
@media (max-width: 1000px) { .brand-sub { display: none; } }

/* phone / small tablet: header wraps, single-column body, shorter scope */
@media (max-width: 720px) {
  #topbar { flex-wrap: wrap; gap: 8px 12px; padding: 9px 12px; }
  .brand { flex: 0 0 auto; }
  .transport { margin-left: auto; gap: 10px; }       /* sits to the right of the brand on row 1 */
  .topbar-status { order: 5; width: 100%; margin-left: 0; }
  #caseChip { flex: 1 1 auto; }
  #caseSelect { max-width: none; width: 100%; }       /* scenario picker spans its own row */

  #layout { grid-template-columns: 1fr; padding: 10px; gap: 10px; }
  /* waveforms first on a phone-sized screen, then settings, then monitors */
  #centercol { order: -1; }
  #rightcol { grid-template-columns: 1fr 1fr; }
  .teach-cols { grid-template-columns: 1fr; gap: 14px; }
  .case-panel { grid-template-columns: 1fr; }
  .case-goals { border-left: 0; border-top: 1px solid var(--border); padding: 8px 0 0; }
  .wave-row { height: 132px; }
  .loop-canvas { height: 210px; }
  .teaching { margin: 12px 10px; padding: 14px; }
}
@media (max-width: 460px) {
  #rightcol { grid-template-columns: 1fr; }
  .speed-wrap label { display: none; }                /* 0.5×/1×/2× is self-explanatory */
  .wave-row { height: 120px; }
}

/* touch devices: enlarge hit targets without affecting mouse users */
@media (pointer: coarse) {
  .t-btn { padding: 9px 14px; }
  .m-btn { padding: 12px 6px; }
  .seg button { padding: 10px 4px; }
  .seg.seg-grid button { padding: 11px 4px; }
  .lp-btn { padding: 7px 14px; }
  .ctrl input[type=range] { height: 6px; }
  .ctrl input[type=range]::-webkit-slider-thumb { width: 22px; height: 22px; }
  .ctrl input[type=range]::-moz-range-thumb { width: 22px; height: 22px; }
}

/* =================================================================
   LIGHT THEME — chrome goes light; the waveform scope stays dark
   (authentic to real ventilators, and keeps the traces vivid)
   ================================================================= */
:root[data-theme="light"] {
  --bg:        #eceff4;
  --bg-panel:  #ffffff;
  --bg-panel2: #f2f5f9;
  --border:    #dde2ea;
  --border-lt: #c6cedb;
  --text:      #233143;
  --text-dim:  #5d6979;
  --text-bright:#0d1422;
  --accent-dim:#0f9d8c;
}
:root[data-theme="light"] body { -webkit-font-smoothing: auto; }
:root[data-theme="light"] #topbar {
  background: linear-gradient(180deg, #ffffff, #eef1f6);
  border-bottom-color: var(--border);
}
:root[data-theme="light"] .panel,
:root[data-theme="light"] .status-chip,
:root[data-theme="light"] .teaching { box-shadow: 0 1px 2px rgba(16, 26, 41, .05); }
:root[data-theme="light"] .alarm-bar.warn { background: #fff3de; border-color: var(--warn); color: #8a5600; }
:root[data-theme="light"] .alarm-bar.crit { background: #ffe1e1; border-color: var(--crit); color: #b3261e; }
:root[data-theme="light"] input[type=range] { background: #d2d9e4; }
:root[data-theme="light"] input[type=range]::-webkit-slider-thumb { border-color: #ffffff; }
:root[data-theme="light"] input[type=range]::-moz-range-thumb { border-color: #ffffff; }