/* =============================================================================
   Ventilator Waveform Trainer — single committed dark "monitor" theme.
   ========================================================================== */

:root {
  --bg:        #070b0f;
  --bg-2:      #0c141b;
  --panel:     #0f1922;
  --panel-2:   #132029;
  --line:      rgba(125, 165, 190, 0.16);
  --line-soft: rgba(125, 165, 190, 0.09);
  --ink:       #dfeaf2;
  --ink-dim:   #8fa6b6;
  --ink-faint: #64798a;
  --accent:    #35d6a4;
  --accent-dk: #1d8f6c;
  --amber:     #ffd23f;
  --flow:      #42e08a;
  --vol:       #69c9ff;
  --danger:    #ff6b6b;
  --ok:        #46d68a;
  --warn:      #ff9d5c;
  --radius:    10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; }

/* ------------------------------------------------------------------ topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #0b1219, #080d12);
  position: sticky; top: 0; z-index: 20;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 13px; }
.brand h1 { font-size: 17px; }
.brand .sub { margin: 1px 0 0; font-size: 12.5px; color: var(--ink-faint); }
.mark {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background:
    linear-gradient(180deg, rgba(53,214,164,0.18), rgba(53,214,164,0.04)),
    repeating-linear-gradient(90deg, transparent 0 5px, rgba(53,214,164,0.35) 5px 6px);
  border: 1px solid rgba(53,214,164,0.35);
}
.topbar-right { display: flex; align-items: center; gap: 18px; }
.stat { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.15; }
.stat-value { font-family: var(--mono); font-size: 16px; color: var(--accent); }
.stat-label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); }

/* ------------------------------------------------------------------ buttons */
.btn {
  font: inherit; font-size: 13.5px; font-weight: 500;
  padding: 8px 15px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line);
  background: var(--panel-2); color: var(--ink);
  transition: background .13s, border-color .13s, transform .06s;
}
.btn:hover { background: #18262f; border-color: rgba(125,165,190,0.3); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent-dk); border-color: var(--accent); color: #eafff7; }
.btn.primary:hover { background: #23a87f; }
.btn.ghost { background: transparent; }
.btn.small { padding: 5px 11px; font-size: 12.5px; }
.btn:disabled { opacity: .45; cursor: default; }

/* ------------------------------------------------------------------ drawer */
.drawer {
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  padding: 14px 22px 18px;
}
.drawer-head { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  font: inherit; font-size: 12.5px; padding: 5px 12px; border-radius: 999px; cursor: pointer;
  background: transparent; color: var(--ink-dim); border: 1px solid var(--line);
}
.chip.active { background: rgba(53,214,164,0.13); border-color: var(--accent); color: var(--accent); }

.case-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.case-list button {
  width: 100%; text-align: left; font: inherit; font-size: 13px; cursor: pointer;
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px; border-radius: 8px; border: 1px solid transparent;
  background: var(--panel); color: var(--ink-dim);
}
.case-list button:hover { border-color: var(--line); color: var(--ink); }
.case-list button.current { border-color: var(--accent); color: var(--ink); }
.case-list .n { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); min-width: 20px; }
.case-list .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.case-list .s { font-size: 12px; }
.case-list .s.done { color: var(--ok); }
.case-list .s.partial { color: var(--warn); }
.case-list .s.miss { color: var(--danger); }

/* ------------------------------------------------------------------ layout */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(340px, 1fr);
  gap: 22px;
  padding: 22px;
  align-items: start;
  max-width: 1560px; margin: 0 auto;
}
@media (max-width: 1020px) { .layout { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------- case head */
.case-head { margin-bottom: 14px; }
.case-head h2 { font-size: 20px; margin: 7px 0 6px; }
.badge {
  display: inline-block; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.07em;
  padding: 2px 8px; border-radius: 5px; border: 1px solid var(--line); color: var(--ink-dim);
}
.badge.basic { color: #7fd6ff; border-color: rgba(127,214,255,0.35); }
.badge.intermediate { color: var(--amber); border-color: rgba(255,210,63,0.35); }
.badge.advanced { color: var(--warn); border-color: rgba(255,157,92,0.4); }
.case-counter { font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); margin-left: 8px; }
.vignette { margin: 0; color: var(--ink-dim); font-size: 14.5px; max-width: 74ch; }

/* ------------------------------------------------------------------- scope */
.scope-bezel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #080d12;
  padding: 6px;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.6), 0 10px 30px rgba(0,0,0,0.35);
}
#wave { display: block; width: 100%; height: 460px; border-radius: 6px; cursor: crosshair; }
@media (max-width: 700px) { #wave { height: 380px; } }

.scope-controls {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  margin-top: 10px; font-size: 13px; color: var(--ink-dim);
}
.toggle { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; user-select: none; }
.toggle input { accent-color: var(--accent); width: 15px; height: 15px; }
.hint { margin-left: auto; font-size: 12px; color: var(--ink-faint); }

/* --------------------------------------------------- independent/dependent */
.varband { margin: 0 0 12px; }
.varband.independent { margin: 14px 0 0; }
.varband-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px;
}
.vb-tag {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600;
  padding: 2px 8px; border-radius: 5px;
  color: var(--vol); background: rgba(105,201,255,0.12); border: 1px solid rgba(105,201,255,0.35);
}
.vb-tag.set {
  color: var(--accent); background: rgba(53,214,164,0.12); border-color: rgba(53,214,164,0.35);
}
.vb-note { font-size: 12px; color: var(--ink-faint); }
.varband-head .btn { margin-left: auto; }

.scope-legend {
  margin: 8px 0 0; font-size: 11.5px; color: var(--ink-faint);
  display: flex; align-items: center; gap: 7px;
}
.scope-legend .swatch {
  width: 20px; height: 10px; border-radius: 2px; display: inline-block;
  background: rgba(255,122,184,0.28); border: 1px solid rgba(255,122,184,0.5);
}

.setgrid .mv-value { color: var(--ink); }
.mv.locked .mv-value { color: var(--ink-faint); }
.mv.locked .mv-label::after {
  content: ' ●'; font-size: 7px; vertical-align: middle; color: var(--warn);
}
.mv.set-revealed { background: var(--panel-2); }

/* ----------------------------------------------------------------- monitor */
.monitor {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 1px; margin-top: 14px;
  background: var(--line-soft);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.mv { background: var(--panel); padding: 9px 12px; }
.mv-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); }
.mv-value { font-family: var(--mono); font-size: 18px; line-height: 1.3; }
.mv-unit { font-size: 11px; color: var(--ink-faint); margin-left: 3px; }
.mv.paw .mv-value { color: var(--amber); }
.mv.flow .mv-value { color: var(--flow); }
.mv.vol .mv-value { color: var(--vol); }

/* -------------------------------------------------------------------- quiz */
.screen-col { position: sticky; top: 82px; }
@media (max-width: 1020px) { .screen-col { position: static; } }

.qblock {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); margin: 0 0 14px; padding: 14px 16px 16px;
}
.qblock legend {
  font-weight: 600; font-size: 14.5px; padding: 0 6px; margin-left: -6px;
  display: flex; align-items: center; gap: 8px;
}
.qnum {
  display: inline-grid; place-items: center; width: 19px; height: 19px; border-radius: 5px;
  background: rgba(53,214,164,0.15); border: 1px solid rgba(53,214,164,0.4);
  color: var(--accent); font-family: var(--mono); font-size: 11px;
}
.qhelp { margin: 2px 0 10px; font-size: 12.5px; color: var(--ink-faint); }

.opts { display: grid; gap: 4px; }
.opt {
  display: flex; gap: 10px; align-items: flex-start; cursor: pointer;
  padding: 7px 9px; border-radius: 7px; border: 1px solid transparent;
  transition: background .12s;
}
.opt:hover { background: var(--panel-2); }
.opt input { margin-top: 3px; accent-color: var(--accent); flex: none; width: 15px; height: 15px; }
.opt-body { display: block; }
.opt-label { display: block; font-size: 13.5px; }
.opt-hint { display: block; font-size: 11.5px; color: var(--ink-faint); }
.none-opt { border: 1px dashed var(--line); margin-bottom: 10px; }

.abn-group { margin-top: 12px; }
.abn-group h3 {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-faint); margin: 0 0 4px 2px; font-weight: 600;
}

/* result-marked options */
.opt.mark-hit    { background: rgba(70,214,138,0.12); border-color: rgba(70,214,138,0.45); }
.opt.mark-missed { background: rgba(255,157,92,0.12); border-color: rgba(255,157,92,0.45); }
.opt.mark-false  { background: rgba(255,107,107,0.10); border-color: rgba(255,107,107,0.4); }
.opt.mark-ok     { border-color: rgba(125,165,190,0.3); }
.tagline {
  font-family: var(--mono); font-size: 10px; letter-spacing: .04em; text-transform: uppercase;
  margin-left: 6px; padding: 1px 5px; border-radius: 4px;
}
.tagline.hit { color: var(--ok); background: rgba(70,214,138,0.14); }
.tagline.missed { color: var(--warn); background: rgba(255,157,92,0.14); }
.tagline.false { color: var(--danger); background: rgba(255,107,107,0.14); }
.tagline.ok { color: var(--ink-faint); background: rgba(125,165,190,0.12); }

.actions { display: flex; gap: 10px; margin-bottom: 14px; }
.nav-row { display: flex; justify-content: space-between; gap: 10px; margin-top: 14px; }

/* ------------------------------------------------------------------ result */
.result {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 16px; margin-bottom: 14px;
}
.verdict { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.verdict .v-mode { font-size: 14.5px; font-weight: 600; }
.verdict .v-mode.good { color: var(--ok); }
.verdict .v-mode.bad { color: var(--danger); }
.verdict .v-find { font-size: 13px; color: var(--ink-dim); font-family: var(--mono); }

.answer-line { font-size: 13.5px; margin: 0 0 12px; color: var(--ink-dim); }
.answer-line strong { color: var(--ink); font-weight: 600; }

.expl h4 {
  margin: 14px 0 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent); font-weight: 600;
}
.expl p { margin: 0; font-size: 14px; color: var(--ink); }
.expl p.dim { color: var(--ink-dim); }
.pearl {
  margin-top: 16px; padding: 11px 13px; border-radius: 8px;
  background: rgba(255,210,63,0.07); border-left: 3px solid var(--amber);
  font-size: 13.5px; color: #f3e6bd;
}

/* ---------------------------------------------------------------- feedback */
.feedback { margin-top: 16px; }
.fb-toggle {
  width: 100%; font: inherit; font-size: 13px; cursor: pointer; text-align: left;
  display: flex; align-items: center; gap: 9px;
  padding: 9px 13px; border-radius: var(--radius);
  border: 1px dashed var(--line); background: transparent; color: var(--ink-dim);
  transition: color .13s, border-color .13s, background .13s;
}
.fb-toggle:hover { color: var(--ink); border-color: rgba(125,165,190,0.34); background: var(--panel); }
.fb-icon { color: var(--accent); font-size: 13px; }
.fb-chev { margin-left: auto; font-size: 10px; transition: transform .15s; }
.fb-toggle[aria-expanded="true"] { border-style: solid; border-bottom-left-radius: 0; border-bottom-right-radius: 0; color: var(--ink); }
.fb-toggle[aria-expanded="true"] .fb-chev { transform: rotate(180deg); }

#feedbackForm {
  border: 1px solid var(--line); border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--panel); padding: 13px 14px 14px;
}
.fb-help { margin: 0 0 10px; font-size: 12px; color: var(--ink-faint); }
#fbText {
  width: 100%; font: inherit; font-size: 13.5px; line-height: 1.5;
  padding: 9px 11px; border-radius: 8px; resize: vertical; min-height: 76px;
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--line);
}
#fbText:focus { border-color: var(--accent); outline: none; }
#fbText::placeholder { color: var(--ink-faint); }
.fb-row { display: flex; align-items: center; gap: 9px; margin-top: 9px; }
.fb-count { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); margin-right: auto; }
.fb-count.over { color: var(--warn); }
.fb-status { margin: 10px 0 0; font-size: 12.5px; }
.fb-status.ok { color: var(--ok); }
.fb-status.warn { color: var(--warn); }
.fb-status.bad { color: var(--danger); }
.fb-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* -------------------------------------------------------------------- foot */
.foot { padding: 22px; border-top: 1px solid var(--line); margin-top: 10px; }
.foot p { margin: 0; font-size: 12px; color: var(--ink-faint); max-width: 90ch; }
.foot .copyright { margin-top: 7px; color: var(--ink-dim); }

::selection { background: rgba(53,214,164,0.3); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------- progress overlay */
.overlay {
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  padding: 18px 22px 24px;
}
.ov-head {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1100px; margin: 0 auto 14px;
}
.ov-head h2 { font-size: 17px; }
.ov-body, .identity { max-width: 1100px; margin: 0 auto; }

.identity {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 14px 16px; margin-bottom: 18px;
}
.identity form { display: flex; gap: 9px; flex-wrap: wrap; align-items: center; }
.identity input[type="email"] {
  font: inherit; font-size: 13.5px; padding: 8px 11px; border-radius: 8px; min-width: 240px; flex: 1;
  background: var(--bg-2); color: var(--ink); border: 1px solid var(--line);
}
.identity input[type="email"]:focus { border-color: var(--accent); outline: none; }
.identity .who { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.id-note { margin: 9px 0 0; font-size: 12px; color: var(--ink-faint); max-width: 78ch; }
.id-status { margin: 8px 0 0; font-size: 12.5px; }
.id-status.ok { color: var(--ok); }
.id-status.warn { color: var(--warn); }

.sum-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.sum-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 14px 16px;
}
.sum-card h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-faint); margin: 0 0 10px; font-weight: 600;
}
.sum-card.good h3 { color: var(--ok); }
.sum-card.bad h3 { color: var(--warn); }
.sum-card.over h3 { color: var(--danger); }
.sum-row {
  display: flex; align-items: baseline; gap: 9px; padding: 5px 0;
  border-bottom: 1px solid var(--line-soft); font-size: 13.5px;
}
.sum-row:last-child { border-bottom: none; }
.sum-row .lbl { flex: 1; }
.sum-row .val { font-family: var(--mono); font-size: 12.5px; }
.sum-row .n { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }
.bar { height: 5px; border-radius: 3px; background: rgba(125,165,190,0.16); width: 70px; overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 3px; }
.bar.good > i { background: var(--ok); }
.bar.bad > i { background: var(--warn); }
.bar.over > i { background: var(--danger); }

.headline { display: flex; gap: 26px; flex-wrap: wrap; margin-bottom: 16px; }
.headline .hv { display: flex; flex-direction: column; }
.headline .hv-num { font-family: var(--mono); font-size: 26px; color: var(--accent); line-height: 1.1; }
.headline .hv-lab { font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); }
.empty-note { color: var(--ink-faint); font-size: 13.5px; }
.caveat { margin: 14px auto 0; max-width: 1100px; font-size: 12px; color: var(--ink-faint); }
.sugg { display: flex; flex-direction: column; gap: 4px; }
.sugg button {
  text-align: left; font: inherit; font-size: 13px; cursor: pointer;
  padding: 7px 10px; border-radius: 8px; border: 1px solid var(--line);
  background: transparent; color: var(--ink-dim);
}
.sugg button:hover { border-color: var(--accent); color: var(--ink); }
.sugg .why { display: block; font-size: 11.5px; color: var(--ink-faint); }

.zoomset { display: inline-flex; align-items: center; gap: 5px; }
.zoom-lab { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-faint); margin-right: 2px; }
.zoomset .chip { padding: 3px 9px; font-size: 11.5px; }

.ver {
  font-family: var(--mono); font-size: 11px; color: var(--ink-faint);
  margin-left: 10px; padding: 1px 7px; border-radius: 4px;
  border: 1px solid var(--line);
}