@font-face {
  font-family: "Enki Arabic";
  src:
    local("AlHurra"),
    local("Al Hurra"),
    local("Al-Hurra"),
    local("Alhurra");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light;
  --ink: #0f1d2e;
  --muted: #5a6b7d;
  --surface: #ffffff;
  --surface-strong: #f5f8fb;
  --line: #d4dce8;
  --brand: #0b1f33;
  --brand-dark: #071523;
  --brand-soft: #e8eef5;
  --accent: #b86a00;
  --danger: #b42318;
  --ok: #0a7c52;
  --focus: #2563eb;
  --warn:#d97706;--cp:#b42318;--cf:#2563eb;--cv:#0a7c52;
  --shadow: 0 4px 14px rgba(11, 31, 51, 0.09), 0 1px 3px rgba(11, 31, 51, 0.05);
  --radius: 8px;
  --radius-soft: 12px;
  --font-ui: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-ar: "Enki Arabic", "AlHurra", "Al Hurra", "Noto Sans Arabic", "Segoe UI", Arial, sans-serif;
  --font-ar-text: "Enki Arabic", "AlHurra", "Al Hurra", "Noto Sans Arabic", "Segoe UI", Arial, sans-serif;
  --nav-height: 58px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  background:
    linear-gradient(180deg, #f7faf9 0%, #eef4f3 420px, #f5f7f6 100%);
  color: var(--ink);
  line-height: 1.55;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 16px;
  background: var(--brand);
  color: #fff;
  min-height: 42px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  background: var(--brand-dark);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.35);
  outline-offset: 2px;
}

button.secondary {
  background: #e7eef3;
  color: var(--ink);
}

button.danger {
  background: var(--danger);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  min-height: 42px;
}

textarea {
  resize: vertical;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 700;
  color: var(--ink);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  z-index: 20;
}

.skip-link:focus {
  top: 12px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.app-header {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.96) 0%, rgba(27, 84, 83, 0.96) 58%, rgba(73, 66, 49, 0.96) 100%);
  color: #fff;
  padding: 28px clamp(16px, 4vw, 44px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.header-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  gap: 24px;
  align-items: end;
}

.kicker {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--accent);
}

.app-header .kicker,
.app-header .subtitle {
  color: rgba(255, 255, 255, 0.86);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.05;
}

h2,
h3 {
  margin: 0;
}

.subtitle {
  max-width: 920px;
  margin: 14px 0 0;
  font-size: 1.02rem;
}

.status-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(10px);
}

.status-panel > div {
  background: rgba(255, 255, 255, 0.12);
  padding: 14px;
}

.status-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0;
  color: rgba(255, 255, 255, 0.74);
}

.status-panel strong {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
}

.app-shell {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 22px;
  padding: 22px clamp(14px, 3vw, 28px) 40px;
}

.side-panel {
  position: sticky;
  top: 14px;
  align-self: start;
  display: grid;
  gap: 14px;
}

.panel-block,
.section-nav,
.intro-band,
.safety-band,
.training-section,
.notes-band,
.appendix-band,
.reader-band,
.home-panel {
  background: var(--surface);
  border: 1px solid rgba(216, 224, 232, 0.85);
  border-radius: var(--radius-soft);
  box-shadow: var(--shadow);
}

[dir="rtl"] .section-heading,
[dir="rtl"] .appendix-reader-header,
[dir="rtl"] .home-card,
[dir="rtl"] .appendix-item,
[dir="rtl"] .chapter-table th,
[dir="rtl"] .chapter-table td {
  text-align: right;
}

[dir="rtl"] .section-nav a {
  grid-template-columns: minmax(0, 1fr) 30px;
}

[dir="rtl"] .section-nav a > span:first-child {
  grid-column: 2;
  grid-row: 1;
}

[dir="rtl"] .section-nav a > .nav-copy {
  grid-column: 1;
  grid-row: 1;
}

.panel-block,
.section-nav {
  padding: 16px;
  display: grid;
  gap: 14px;
}

.panel-block h2,
.section-nav h2 {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 1rem;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 4px;
  background: #e7eef3;
  border-radius: 20px;
}

.segmented button {
  min-height: 38px;
  background: transparent;
  color: var(--ink);
  display: grid;
  gap: 2px;
  place-items: center;
}

.segmented button.active {
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 2px 8px rgba(20, 33, 61, 0.12);
}

.install-inline {
  width: 100%;
}

.reset-inline {
  width: 100%;
}

.workspace-btn {
  min-height: 44px;
  background: #eef3f6;
  color: var(--ink);
  display: grid;
  place-items: center;
  gap: 2px;
  border-radius: 999px;
}

.workspace-btn.active {
  background: #dff3ef;
  color: var(--brand-dark);
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.18);
}

.autosave,
.autosave-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.section-nav ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 5px;
  max-height: 42vh;
  overflow: auto;
}

.section-nav a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 9px;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
  padding: 8px 9px;
  border-radius: 10px;
  min-width: 0;
}

.section-nav a:hover,
.section-nav a.active {
  background: var(--brand-soft);
}

.section-nav a.active span:first-child {
  background: var(--brand);
  color: #fff;
}

.section-nav span:first-child {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: #dce8ef;
  font-weight: 800;
  font-size: 0.76rem;
  flex: 0 0 auto;
}

.nav-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.nav-copy .en-block,
.nav-copy .ar-block {
  min-width: 0;
  max-width: 100%;
  overflow: hidden !important;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-copy .en-block {
  display: block;
  font-size: 0.82rem;
  font-weight: 800;
}

.nav-copy .ar-block {
  display: block;
  font-size: 0.88rem;
  line-height: 1.35;
}

body[data-language-mode="both"] .section-nav a {
  align-items: start;
}

body[data-language-mode="both"] .nav-copy .en-block,
body[data-language-mode="both"] .nav-copy .ar-block {
  white-space: normal;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

body[data-language-mode="both"] .nav-copy .en-block {
  font-size: 0.73rem;
}

body[data-language-mode="both"] .nav-copy .ar-block {
  font-size: 0.8rem;
}

.content {
  min-width: 0;
  display: grid;
  gap: 18px;
}

.workspace-block {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.home-panel {
  padding: clamp(18px, 3vw, 30px);
}

.home-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 18px;
}

.home-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.home-metrics span {
  display: grid;
  gap: 2px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fbfdfe;
}

.home-metrics strong {
  font-size: 1.1rem;
}

.home-metrics small {
  color: var(--muted);
  font-weight: 700;
}

.home-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-content: start;
  min-height: auto;
  padding: 20px 22px 20px 30px;
  border: 1px solid rgba(191, 205, 211, 0.72);
  border-radius: 16px;
  background: #fff;
  text-align: left;
  color: var(--ink);
  box-shadow: 0 4px 18px rgba(11,31,51,.07), 0 1px 4px rgba(11,31,51,.04);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .18s, transform .14s, border-color .15s, background .15s;
}

.home-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--brand);
  border-radius: 16px 0 0 16px;
  transition: width .15s;
}

.home-card::after {
  content: "→";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%) translateX(0);
  font-size: 1.3rem;
  color: var(--brand);
  opacity: .35;
  transition: opacity .15s, transform .15s;
}

.home-card:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
  box-shadow: 0 8px 28px rgba(11,31,51,.12);
  transform: translateY(-2px);
}

.home-card:hover::before { width: 8px; }
.home-card:hover::after  { opacity: .9; transform: translateY(-50%) translateX(4px); }
.home-card:active        { transform: translateY(0); }

.home-card h3,
.home-card p {
  margin: 0;
}

.home-card p {
  color: var(--muted);
}

.home-card > span {
  display: grid;
  gap: 8px;
}

.progress-track {
  position: sticky;
  top: 0;
  height: 10px;
  background: #dce8ef;
  border-radius: 999px;
  overflow: hidden;
  z-index: 5;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--brand), #2b8a3e);
  transition: width 0.25s ease;
}

.intro-band,
.safety-band,
.notes-band,
.appendix-band,
.reader-band {
  padding: clamp(18px, 3vw, 28px);
}

.intro-layout {
  display: grid;
  gap: 12px;
}

.lang-block {
  display: grid;
  gap: 10px;
}

.copy-pair,
.safety-item-pair,
.bullet-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
}

.copy-pair p,
.safety-item-pair p,
.bullet-pair p {
  margin: 0;
}

.copy-pair + .copy-pair,
.safety-item-pair + .safety-item-pair,
.bullet-pair + .bullet-pair {
  margin-top: 10px;
}

.ar {
  direction: rtl;
  text-align: right;
  font-family: var(--font-ar);
  line-height: 1.85;
  font-size: 1.03rem;
}

.safety-grid {
  display: grid;
  gap: 10px;
}

.agreement {
  margin-top: 16px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface-strong);
}

.agreement input {
  width: 22px;
  min-height: 22px;
  margin-top: 2px;
}

.sections {
  display: grid;
  gap: 16px;
}

.training-section {
  overflow: hidden;
  border-radius: 30px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.section-progress {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #e7eef3;
  color: var(--ink);
  font-weight: 800;
  font-size: 0.82rem;
  white-space: nowrap;
}

.section-status-stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.training-section .section-heading {
  padding: 18px clamp(16px, 3vw, 24px);
  background: var(--surface-strong);
  border-bottom: 1px solid var(--line);
}

.section-number {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.section-title-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.section-body {
  padding: clamp(16px, 3vw, 24px);
  display: grid;
  gap: 16px;
}

.summary-grid,
.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}

.summary-grid p,
.detail-grid p {
  margin: 0;
}

.summary-grid {
  grid-template-columns: 1fr;
}

.checklist {
  display: grid;
  gap: 9px;
}

.check-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
}

.check-item:has(input:checked) {
  border-color: rgba(19, 115, 51, 0.4);
  background: #f1fbf4;
}

.check-item.checked {
  border-color: rgba(19, 115, 51, 0.4);
  background: #f1fbf4;
}

.check-item input {
  width: 20px;
  min-height: 20px;
  margin-top: 3px;
}

.item-copy {
  display: grid;
  gap: 4px;
}

.item-copy p {
  margin: 0;
}

.item-en {
  font-weight: 700;
}

.item-ar {
  color: #334155;
}

.detail-box {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 14px;
  background: #fbfdfe;
}

.source-expansion {
  border: 1px solid #d8e2eb;
  border-radius: 10px;
  background: #fbfdfe;
  overflow: hidden;
}

.source-expansion summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 900;
  color: var(--ink);
  background: #eef3f6;
}

.source-expansion summary > span {
  display: grid;
  gap: 2px;
}

.source-expansion summary small {
  color: var(--muted);
  font-weight: 800;
}

.source-expansion-grid {
  display: grid;
  gap: 8px;
  padding: 12px 14px 14px;
}

.source-expansion-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  padding: 10px 11px;
  border: 1px solid #dfe7ef;
  border-radius: 8px;
  background: #fff;
}

.source-expansion-line p {
  margin: 0;
}

.detail-box h4 {
  margin: 0 0 10px;
}

.detail-box ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.detail-box .ar ul {
  padding-left: 0;
  padding-right: 18px;
}

.input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.note-editor {
  margin-top: 14px;
  padding: 14px;
  border-radius: 22px;
  background: var(--surface-strong);
  display: grid;
  gap: 12px;
}

.inline-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.notes-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.note-item {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 12px;
  background: #fff;
}

.note-meta {
  color: var(--muted);
  font-size: 0.86rem;
  margin-bottom: 6px;
}

.note-actions {
  margin-top: 10px;
}

.appendix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 18px;
  min-width: 0;
}

.appendix-band,
.appendix-reader,
.appendix-item {
  min-width: 0;
  max-width: 100%;
}

.reader-pager {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.appendix-category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow: visible;
  padding: 2px 0 8px;
}

.appendix-category-chip {
  flex: 1 1 150px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 8px 12px;
  border: 1px solid rgba(212, 220, 232, 0.95);
  border-radius: 12px;
  background: #f5f8fb;
  color: var(--ink);
  box-shadow: none;
}

.appendix-category-chip:hover {
  background: #edf3f4;
  border-color: rgba(15, 118, 110, 0.35);
}

.appendix-category-chip.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.appendix-category-chip > span {
  display: grid;
  gap: 1px;
  text-align: start;
  line-height: 1.1;
}

.appendix-category-chip small {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
}

.appendix-category-chip.active small {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.appendix-item,
.reader-step,
.appendix-reader {
  border: 1px solid rgba(216, 224, 232, 0.9);
  border-radius: 16px;
  padding: 18px 20px;
  background: #fff;
}

.appendix-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px 18px;
  align-items: center;
  text-align: start;
  color: var(--ink);
  box-shadow: 0 8px 20px rgba(20, 33, 61, 0.035);
  position: relative;
}

.appendix-item::before {
  content: "";
  position: absolute;
  inset: 14px auto 14px 0;
  width: 6px;
  border-radius: 0 999px 999px 0;
  background: #c9d8dc;
}

.appendix-item:hover {
  border-color: rgba(15, 118, 110, 0.45);
  background: #f8fffd;
  transform: translateY(-1px);
}

.appendix-item.active {
  border-color: rgba(15, 118, 110, 0.65);
  background: #edf8f5;
}

.appendix-item.active::before {
  background: var(--brand);
}

.appendix-item p {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
}

.appendix-item .ar {
  margin-top: 8px;
}

.appendix-item > span:first-child {
  display: grid;
  gap: 8px;
}

.appendix-item > span:nth-child(2) {
  justify-self: end;
  padding: 7px 10px;
  border-radius: 999px;
  background: #eef3f6;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.empty-search-state {
  margin: 14px 0 0;
  padding: 12px 14px;
  border: 1px dashed #c8d3df;
  border-radius: 12px;
  background: #f8fafb;
  color: var(--muted);
  font-weight: 700;
}

.reader-layout,
.appendix-reader,
.appendix-content {
  display: grid;
  gap: 12px;
}

.reader-layout,
.appendix-reader {
  margin-top: 18px;
}

.reader-step {
  box-shadow: 0 8px 22px rgba(20, 33, 61, 0.035);
}

.reader-step h3,
.appendix-reader h3 {
  display: grid;
  gap: 5px;
  margin: 0;
}

.read-marker {
  width: 7px;
  height: 7px;
  margin-top: 11px;
  border-radius: 999px;
  background: var(--brand);
}

.clinical-detail-stream {
  display: grid;
  gap: 8px;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid #d8e2eb;
}

.clinical-detail-stream h4 {
  display: grid;
  gap: 2px;
  margin: 0;
}

/* ═══════════════════════════════════════════════════════════════
   TEACHING DETAIL — KIND-AWARE VISUAL SYSTEM
   4 kinds: heading | paragraph | bullet | note
   Each gets its own accent colour and card treatment.
═══════════════════════════════════════════════════════════════ */

/* ── Container ──────────────────────────────────────────────── */
.reading-unit-list {
  display: grid;
  gap: 0;
}

/* ── Base card ───────────────────────────────────────────────── */
.reading-unit {
  display: grid;
  gap: 0;
  padding: 16px 20px 16px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  border-left: 4px solid var(--line);
  transition: border-left-color .15s;
}
.reading-unit:last-child { border-bottom: 0; }

/* ── Kind-based left accent colours ─────────────────────────── */
.reading-unit[data-kind="heading"] {
  border-left-color: var(--brand);
  background: #f4f8fd;
  padding: 18px 20px 14px 20px;
}
.reading-unit[data-kind="note"] {
  border-left-color: #f59e0b;
  background: #fffdf5;
}
.reading-unit[data-kind="bullet"] {
  border-left-color: #10b981;
  background: var(--surface);
}
.reading-unit[data-kind="paragraph"] {
  border-left-color: #8b9dc3;
  background: var(--surface);
}

/* ── Language blocks ─────────────────────────────────────────── */
.reading-language {
  display: grid;
  gap: 8px;
  min-width: 0;
}
.reading-language + .reading-language {
  padding-top: 10px;
  margin-top: 8px;
  border-top: 1px solid var(--line);
}
/* Heading units: tighter EN/AR pairing */
.reading-unit[data-kind="heading"] .reading-language + .reading-language {
  padding-top: 4px;
  margin-top: 4px;
  border-top: none;
}

/* ── HEADING ─────────────────────────────────────────────────── */
h5.rl-heading {
  margin: 0;
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.45;
  color: var(--ink);
  letter-spacing: -0.02em;
  border-bottom: 2px solid var(--brand);
  padding-bottom: 6px;
  margin-bottom: 2px;
}
.reading-language.ar h5.rl-heading {
  color: var(--ink);
  font-size: 1.02rem;
  font-weight: 900;
  border-bottom-color: rgba(11,31,51,.15);
}

/* ── PARAGRAPH ───────────────────────────────────────────────── */
p.rl-para {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink);
  max-width: 88ch;
}
.reading-language.ar p.rl-para {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.9;
  color: #1a2b3c;
}

/* ── BULLETS ─────────────────────────────────────────────────── */
ul.rl-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}
ul.rl-bullets li {
  padding: 6px 10px 6px 30px;
  position: relative;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink);
  background: rgba(16,185,129,.04);
  border-radius: 6px;
}
ul.rl-bullets li::before {
  content: "▸";
  position: absolute;
  left: 10px;
  color: #10b981;
  font-size: 0.75rem;
  top: 8px;
  font-weight: 900;
}
.reading-language.ar ul.rl-bullets li {
  padding: 6px 30px 6px 10px;
  text-align: right;
  font-size: 0.93rem;
  font-weight: 550;
}
.reading-language.ar ul.rl-bullets li::before {
  left: auto;
  right: 10px;
  content: "◂";
}

/* ── NOTE callout ────────────────────────────────────────────── */
aside.rl-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: #fffbea;
  border: 1px solid #fde68a;
  border-radius: 8px;
  padding: 10px 13px;
  margin: 0;
}
aside.rl-note .rl-note-icon {
  font-size: 1rem;
  flex-shrink: 0;
  line-height: 1.6;
}
aside.rl-note p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: #78350f;
  font-weight: 500;
}

/* ── Source expansion (Clinical detail) ─────────────────────── */
.source-expansion {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
}
.source-expansion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 16px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--surface-strong);
  user-select: none;
  list-style: none;
  gap: 10px;
}
.source-expansion > summary::-webkit-details-marker { display: none; }
.source-expansion > summary::after {
  content: "▾";
  font-size: 0.8rem;
  color: var(--muted);
  transition: transform .2s;
}
.source-expansion[open] > summary::after { transform: rotate(180deg); }
.source-expansion > summary small {
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1px 8px;
}

/* Training source detail (the <details> wrapping reading units) */
.training-source-detail {
  margin-top: 16px;
}
.training-source-detail > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--brand);
  color: #fff;
  user-select: none;
  list-style: none;
  gap: 10px;
  border-radius: 10px 10px 0 0;
}
.training-source-detail > summary::-webkit-details-marker { display: none; }
.training-source-detail > summary::after {
  content: "▾";
  font-size: 0.85rem;
  opacity: .7;
  transition: transform .2s;
}
.training-source-detail[open] > summary::after { transform: rotate(180deg); }
.training-source-detail > summary small {
  font-weight: 500;
  font-size: 0.75rem;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  padding: 1px 8px;
  color: #fff;
}
.training-source-body {
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 10px 10px;
  overflow: hidden;
  background: var(--surface);
}

/* Source expansion grid */
.source-expansion-grid {
  display: grid;
  gap: 0;
}
.source-expansion-line {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 6px;
}
.source-expansion-line:last-child { border-bottom: 0; }
.source-expansion-line p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
}


/* ═══════════════════════════════════════════════════════
   VENTILATION WORKSPACE — MV Simulator styles
   Scoped under #ventilationMount
═══════════════════════════════════════════════════════ */
#ventilationMount {
  flex: 1;
  height: 0;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
/* MV sub-tab bar */
.mv-tab-bar {
  background: var(--brand-dark);
  display: flex;
  align-items: stretch;
  padding: 0 20px;
  gap: 2px;
  flex-shrink: 0;
}
.mv-tab-btn {
  background: none;
  border: none;
  color: rgba(255,255,255,.55);
  font-size: 13px;
  font-weight: 500;
  padding: 0 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all .15s;
  font-family: inherit;
  height: 40px;
}
.mv-tab-btn.active { color: #fff; border-bottom-color: #fff; }
.mv-tab-btn:hover:not(.active) { color: rgba(255,255,255,.82); }
.mv-pane { display: none; flex: 1; overflow: hidden; }
.mv-pane.active { display: flex; flex-direction: column; }
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Segoe UI",Roboto,Arial,sans-serif;background:var(--surface-strong);color:var(--ink);font-size:14px;line-height:1.55}
#app{display:grid;grid-template-rows:56px 44px 1fr;height:100dvh;overflow:hidden}
.app-head{background:var(--brand);display:flex;align-items:center;gap:12px;padding:0 20px}
.app-logo{display:flex;align-items:center;gap:9px;color:#fff;font-weight:700;font-size:14px;letter-spacing:.03em}
.app-logo-mark{width:30px;height:30px;background:#fff1;border-radius:7px;display:grid;place-items:center;font-size:18px}
.app-head-sub{color:rgba(255,255,255,.55);font-size:11px;font-weight:500;letter-spacing:.07em;text-transform:uppercase;margin-left:auto;border-left:1px solid rgba(255,255,255,.15);padding-left:14px}
.tab-bar{background:var(--brand-dark);display:flex;align-items:stretch;padding:0 20px;gap:2px}
.tab-btn{background:none;border:none;color:rgba(255,255,255,.55);font-size:13px;font-weight:500;padding:0 18px;cursor:pointer;border-bottom:2px solid transparent;transition:all .15s;font-family:inherit;letter-spacing:.02em}
.tab-btn.active{color:#fff;border-bottom-color:#fff}
.tab-btn:hover:not(.active){color:rgba(255,255,255,.82)}
.tab-pane{display:none;overflow:hidden}
.tab-pane.active{display:flex;flex-direction:column;flex:1;overflow:hidden}

/* ══ INFO TAB ══ */
.info-wrap{display:grid;grid-template-columns:220px 1fr;height:100%;overflow:hidden}
.info-sidebar{background:var(--surface);border-right:1px solid var(--line);overflow-y:auto;padding:16px 0}
.info-sidebar-section{padding:6px 16px 2px;font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:12px}
.info-nav-link{display:block;padding:6px 20px;font-size:13px;color:var(--ink);text-decoration:none;border-left:3px solid transparent;transition:all .12s}
.info-nav-link:hover{background:var(--brand-soft);color:var(--brand)}
.info-nav-link.active{border-left-color:var(--brand);background:var(--brand-soft);color:var(--brand);font-weight:600}
.info-body{overflow-y:auto;padding:28px 32px}
.info-section-title{font-size:18px;font-weight:700;color:var(--brand);margin-bottom:4px;padding-bottom:10px;border-bottom:2px solid var(--brand-soft);margin-top:8px}
.info-section-desc{color:var(--muted);font-size:13px;margin-bottom:20px}
.param-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:14px;margin-bottom:32px}
.param-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;box-shadow:var(--shadow)}
.param-card-head{background:var(--brand);color:#fff;padding:10px 14px;display:flex;align-items:center;justify-content:space-between}
.param-card-head.pbw{background:var(--focus)}
.param-name{font-weight:700;font-size:14px}
.param-range{font-size:11px;background:rgba(255,255,255,.15);padding:2px 8px;border-radius:20px;letter-spacing:.04em}
.param-body{padding:14px}
.param-def{font-size:13px;color:var(--ink);margin-bottom:10px;font-style:italic}
.param-effects{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:10px}
.effect-box{border-radius:6px;padding:8px 10px;font-size:12px}
.effect-up{background:#fef3e2;border:1px solid #f5c97a}
.effect-down{background:#e8f5ee;border:1px solid #74c99a}
.effect-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:3px}
.effect-up .effect-label{color:var(--accent)}
.effect-down .effect-label{color:var(--ok)}
.param-example{font-size:12px;color:var(--muted);background:var(--surface-strong);border-radius:6px;padding:8px 10px;border-left:3px solid var(--brand-soft)}
.param-example strong{color:var(--brand);display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px}
.pbw-formula{background:#eff6ff;border:1px solid #bfdbfe;border-radius:6px;padding:10px 12px;font-size:12px;margin-bottom:10px;font-family:"Courier New",monospace;color:#1e40af}
.pbw-note{background:#fffbeb;border:1px solid #fde68a;border-radius:6px;padding:8px 10px;font-size:12px;color:#92400e;margin-top:8px}
.waveform-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}
.wf-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;box-shadow:var(--shadow)}
.wf-head{padding:10px 14px;font-weight:700;font-size:13px;color:#fff}
.wf-pressure .wf-head{background:var(--danger)}
.wf-flow .wf-head{background:var(--focus)}
.wf-volume .wf-head{background:var(--ok)}
.wf-body{padding:14px;font-size:13px}
.wf-abnormal-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:8px 0 6px}
.ab-item{display:flex;gap:8px;margin-bottom:5px;align-items:flex-start;font-size:12px}
.ab-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0;margin-top:3px;background:var(--danger)}
.modes-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:28px}
.mode-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;box-shadow:var(--shadow)}
.mode-head{background:var(--brand);color:#fff;padding:10px 14px}
.mode-title{font-weight:700;font-size:14px}
.mode-subtitle{font-size:11px;opacity:.7;margin-top:2px}
.mode-body{padding:14px;font-size:13px}
.mode-row{display:flex;gap:8px;margin-bottom:6px;align-items:flex-start}
.mode-row-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);flex-shrink:0;width:70px;padding-top:1px}
.mode-pill{display:inline-block;font-size:10px;padding:2px 7px;border-radius:12px;font-weight:600}
.pill-ctrl{background:#e8eef5;color:var(--brand)}
.pill-var{background:#fff3e0;color:var(--accent)}
.pill-risk{background:#fde8e8;color:var(--danger)}

/* ══ SIM TAB ══ */
.sim-wrap{display:grid;grid-template-columns:268px 1fr;height:100%;overflow:hidden;background:var(--surface-strong)}
.sim-controls{background:var(--surface);border-right:1px solid var(--line);overflow-y:auto;padding:14px}
.ctrl-section{margin-bottom:14px}
.ctrl-section-title{font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:8px;padding-bottom:5px;border-bottom:1px solid var(--line)}
/* Patient card */
.patient-card{background:var(--brand-soft);border:1px solid var(--brand);border-radius:var(--r);padding:10px 12px;margin-bottom:12px}
.pc-title{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--brand);margin-bottom:8px}
.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:8px}
.pc-field{display:flex;flex-direction:column;gap:3px}
.pc-label{font-size:10px;color:var(--muted);font-weight:600}
.pc-input{background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:5px 7px;font-size:12px;font-family:inherit;color:var(--ink);width:100%;outline:none;transition:border-color .12s}
.pc-input:focus{border-color:var(--focus)}
.sex-toggle{display:grid;grid-template-columns:1fr 1fr;gap:3px}
.sex-btn{background:var(--surface);border:1px solid var(--line);border-radius:5px;padding:5px;font-size:11px;font-weight:600;cursor:pointer;font-family:inherit;color:var(--muted);transition:all .12s;text-align:center}
.sex-btn.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.pbw-display{background:var(--surface);border-radius:6px;padding:8px 10px;font-size:12px;border:1px solid var(--line)}
.pbw-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:3px}
.pbw-key{color:var(--muted);font-size:11px}
.pbw-val{font-weight:700;font-size:13px;color:var(--brand)}
.pbw-range{font-size:11px;color:var(--ok);font-weight:600}
.vt-kg-badge{display:inline-block;font-size:11px;font-weight:700;padding:2px 7px;border-radius:12px;margin-left:4px}
.vt-kg-ok{background:#e8f5ee;color:var(--ok)}
.vt-kg-warn{background:#fffbeb;color:var(--warn)}
.vt-kg-bad{background:#fde8e8;color:var(--danger)}
/* Mode tabs */
.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:10px}
.mode-tab{background:var(--surface-strong);border:1px solid var(--line);border-radius:6px;padding:7px;font-size:11px;font-weight:700;cursor:pointer;text-align:center;transition:all .12s;font-family:inherit;color:var(--muted)}
.mode-tab.active{background:var(--brand);color:#fff;border-color:var(--brand)}
/* Sliders */
.slider-row{margin-bottom:9px}
.slider-label{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:3px}
.slider-name{font-size:12px;color:var(--ink)}
.slider-val{font-size:13px;font-weight:700;color:var(--brand)}
.slider-unit{font-size:10px;color:var(--muted);margin-left:2px}
input[type=range]{width:100%;accent-color:var(--brand);cursor:pointer;height:4px}
/* Presets */
.preset-btns{display:flex;gap:5px;flex-wrap:wrap}
.preset-btn{font-size:11px;border:1px solid var(--line);background:var(--surface);border-radius:6px;padding:5px 9px;cursor:pointer;font-family:inherit;color:var(--ink);transition:all .12s;font-weight:500}
.preset-btn:hover{background:var(--brand-soft);border-color:var(--brand);color:var(--brand)}
.preset-btn.active{background:var(--brand);color:#fff;border-color:var(--brand)}
/* Run button */
.run-btn{width:100%;padding:10px;border:none;border-radius:8px;font-size:13px;font-weight:700;cursor:pointer;font-family:inherit;transition:all .15s;display:flex;align-items:center;justify-content:center;gap:8px}
.run-btn.start{background:var(--ok);color:#fff}
.run-btn.stop{background:var(--danger);color:#fff}
.run-btn:hover{opacity:.88;transform:translateY(-1px)}
/* Mode info box */
.mode-info-box{background:var(--brand-soft);border:1px solid var(--brand);border-radius:7px;padding:9px 11px;font-size:12px;color:var(--brand);margin-bottom:10px;line-height:1.6}
.mode-info-box strong{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:2px;opacity:.7}
/* VG indicator */
.vg-indicator{background:var(--surface-strong);border:1px solid var(--line);border-radius:6px;padding:8px 10px;font-size:12px;margin-bottom:8px}
.vg-label{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:2px}
.vg-bar-track{height:5px;background:var(--line);border-radius:3px;overflow:hidden;margin-top:4px}
.vg-bar-fill{height:100%;background:var(--focus);border-radius:3px;transition:width .35s}
/* Auto-PEEP warning */
.aap-warn{background:#fffbeb;border:1px solid #f59e0b;border-radius:7px;padding:9px 11px;font-size:12px;margin-bottom:8px;display:none}
.aap-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--warn);margin-bottom:4px}
.aap-val{font-size:16px;font-weight:800;color:var(--warn);font-family:"Courier New",monospace}
.aap-note{font-size:11px;color:#92400e;margin-top:3px}
/* PSV ETS warning */
.ets-warn{font-size:11px;padding:3px 8px;border-radius:4px;margin-top:3px;display:none}
.ets-early{background:#fde8e8;color:var(--danger)}
.ets-late{background:#fffbeb;color:var(--warn)}
/* Charts area */
.sim-charts{overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.readings-bar{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:9px 14px;display:flex;gap:0;flex-wrap:wrap;align-items:center;flex-shrink:0}
.reading-item{display:flex;flex-direction:column;align-items:center;min-width:58px;padding:0 8px;border-right:1px solid var(--line)}
.reading-item:last-child{border-right:none}
.reading-label{font-size:9px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600;white-space:nowrap}
.reading-value{font-size:18px;font-weight:800;color:var(--brand);line-height:1.1;font-family:"Courier New",monospace}
.reading-unit{font-size:9px;color:var(--muted)}
.reading-item.pip .reading-value{color:var(--cp)}
.reading-item.fio2 .reading-value{color:var(--cf)}
.reading-item.mv .reading-value{color:var(--ok)}
.reading-item.pplat .reading-value{color:var(--accent)}
.reading-item.vtkgpbw .reading-value{font-size:14px}
.chart-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);flex-shrink:0}
.chart-head{padding:6px 14px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--line)}
.chart-title{font-weight:700;font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.chart-unit{font-size:11px;color:var(--muted)}
.chart-p .chart-head{background:#fff5f5}.chart-p .chart-title{color:var(--cp)}
.chart-f .chart-head{background:#f0f4ff}.chart-f .chart-title{color:var(--cf)}
.chart-v .chart-head{background:#f0faf4}.chart-v .chart-title{color:var(--cv)}
.chart-body{position:relative;padding:3px 6px 6px;min-height:276px}
.chart-body canvas{display:block;width:100%;min-height:260px}
@media(max-width:768px){
  .chart-body canvas{min-height:200px}
  .sim-wrap{grid-template-columns:1fr}
  .sim-controls{height:auto;max-height:45vh}
  .waveform-grid,.modes-grid{grid-template-columns:1fr}
  .info-wrap{grid-template-columns:1fr}
  .info-sidebar{display:none}
}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.pbw-target-note{font-size:11px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:5px;padding:6px 9px;color:#1e40af;margin-top:8px}
/* ── Waveform pattern recognition cards ── */
.pg-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:12px;margin-bottom:24px}
.pg-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);overflow:hidden;box-shadow:var(--shadow)}
.pg-head{padding:9px 14px;display:flex;align-items:center;justify-content:space-between}
.pg-head-title{font-weight:700;font-size:13px;color:#fff}
.pg-head-tag{font-size:9px;background:rgba(255,255,255,.22);padding:2px 7px;border-radius:10px;color:#fff;letter-spacing:.05em;font-weight:600}
.pg-body{padding:12px 14px}
.pg-traces{display:flex;gap:6px;margin-bottom:10px}
.pg-trace{flex:1;min-width:0}
.pg-trace-lbl{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;text-align:center;margin-bottom:3px}
.lbl-p{color:var(--cp)}.lbl-f{color:var(--cf)}.lbl-v{color:var(--cv)}
.pg-trace svg{display:block;width:100%;border:1px solid var(--line);border-radius:3px}
.pg-info{font-size:12px;line-height:1.55}
.pg-row{display:flex;gap:6px;margin-bottom:5px;align-items:flex-start}
.pg-lbl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);flex-shrink:0;width:56px;padding-top:1px}
.pg-action{font-size:11px;background:#fef9ee;border:1px solid #fcd34d;border-radius:5px;padding:6px 9px;margin-top:8px}
.pg-action-hd{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin-bottom:2px}
/* ETCO2 brief info note */
.etco2-note{background:#f0f4ff;border:1px solid #bfdbfe;border-radius:var(--r2);padding:14px;margin-top:4px;font-size:12px;line-height:1.65}
.etco2-note-title{font-weight:700;font-size:14px;color:#1e40af;margin-bottom:6px}
/* ── Parameter helper buttons ── */
.help-btn{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;border:1px solid var(--line);background:none;color:var(--muted);font-size:9px;font-weight:700;cursor:pointer;font-family:inherit;flex-shrink:0;margin-left:5px;vertical-align:middle;transition:all .12s;padding:0;line-height:1}
.help-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.helper-overlay{position:fixed;inset:0;z-index:998;display:none}
.helper-popup{position:fixed;z-index:999;background:var(--surface);border:1px solid var(--line);border-radius:var(--r2);box-shadow:0 8px 32px rgba(11,31,51,.2);padding:14px 16px;width:270px;display:none;font-size:12px;line-height:1.55}
.helper-popup-title{font-weight:700;font-size:13px;color:var(--brand);margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.helper-row{display:flex;gap:8px;margin-bottom:5px;align-items:flex-start}
.helper-row-lbl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);flex-shrink:0;width:52px;padding-top:1px}
.helper-close{float:right;background:none;border:none;font-size:18px;cursor:pointer;color:var(--muted);line-height:1;padding:0;margin-left:8px}
/* ── Measure Pplat button ── */
.pplat-btn{width:100%;padding:8px 10px;border:1px solid #bfdbfe;background:#eff6ff;color:#1e40af;border-radius:7px;font-size:12px;font-weight:600;cursor:pointer;font-family:inherit;margin-top:8px;transition:all .12s;display:flex;align-items:center;gap:6px}
.pplat-btn:hover{background:var(--focus);color:#fff;border-color:var(--focus)}
.pplat-result{background:#eff6ff;border:1px solid #bfdbfe;border-radius:7px;padding:10px 12px;margin-top:6px;display:none}
.pplat-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:6px}
.pplat-metric{text-align:center}
.pplat-metric-label{font-size:9px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:600}
.pplat-metric-val{font-size:22px;font-weight:800;color:var(--focus);font-family:"Courier New",monospace;line-height:1.2}
.pplat-metric-unit{font-size:9px;color:var(--muted)}
.pplat-note{font-size:10px;color:#1e40af}

/* ── Global language toggle in nav bar ───────────────────────────────── */
.command-lang {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 0 10px;
  border-right: 1px solid rgba(255,255,255,.15);
  flex-shrink: 0;
}
.command-lang .mode-btn {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.65);
  border-radius: 5px;
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all .12s;
  white-space: nowrap;
}
.command-lang .mode-btn.active {
  background: rgba(255,255,255,.22);
  color: #fff;
  border-color: rgba(255,255,255,.45);
}
.command-lang .mode-btn:hover:not(.active) {
  background: rgba(255,255,255,.15);
  color: rgba(255,255,255,.88);
}
@media (max-width: 640px) {
  .command-lang { padding: 0 6px; }
  .command-lang .mode-btn { padding: 3px 6px; font-size: 10px; }
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
.app-footer {
  border-top: 1px solid var(--line);
  background: var(--surface-strong);
  padding: 12px 24px;
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  text-align: center;
  font-size: 11.5px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.footer-name { font-weight: 800; color: var(--ink); letter-spacing: -0.1px; }
.footer-sep  { opacity: 0.3; }
.footer-version {
  font-weight: 700;
  font-size: 10.5px;
  background: var(--brand-soft);
  border: 1px solid var(--line);
  padding: 2px 8px;
  border-radius: 20px;
  color: var(--brand);
  letter-spacing: 0.2px;
}
.footer-copy { opacity: 0.55; font-size: 11px; }
.hard-refresh-btn {
  background: none;
  border: 1px solid var(--line);
  border-radius: 50%;
  width: 20px; height: 20px;
  padding: 0; font-size: 12px; line-height: 1;
  color: var(--muted);
  cursor: pointer;
  opacity: 0.6;
  transition: opacity .15s, transform .3s;
  display: inline-flex; align-items: center; justify-content: center;
}
.hard-refresh-btn:hover { opacity: 1; }
@keyframes hr-spin { to { transform: rotate(360deg); } }
.hard-refresh-btn.spinning { animation: hr-spin 0.7s linear infinite; opacity: 1; }

/* ═══════════════════════════════════════════════════════════════
   UPDATE TOAST (IDG pattern)
═══════════════════════════════════════════════════════════════ */
.update-toast {
  position: fixed;
  bottom: 80px; left: 50%;
  transform: translateX(-50%) translateY(16px);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
}
.update-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.update-toast-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--brand);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  box-shadow: 0 8px 28px rgba(11,31,51,.22), 0 2px 6px rgba(11,31,51,.12);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.update-toast-inner:hover { background: var(--brand-dark); }
.update-toast-badge {
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.update-toast-hint {
  font-size: 11px;
  opacity: .65;
  font-style: italic;
}
.update-toast-close {
  background: none; border: none; color: rgba(255,255,255,.7);
  cursor: pointer; font-size: 14px; padding: 0 2px; line-height: 1;
}
.update-toast-close:hover { color: #fff; }

/* ═══════════════════════════════════════════════════════════════
   ABOUT PAGE v2
═══════════════════════════════════════════════════════════════ */
.about-page-v2 {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 0 48px;
  display: grid;
  gap: 0;
}

/* Hero */
.about-hero {
  padding: 40px 0 32px;
  border-bottom: 2px solid var(--brand-soft);
  margin-bottom: 36px;
}
.about-hero-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 900;
  color: var(--brand);
  line-height: 1.2;
  margin: 8px 0 14px;
}
.about-hero-sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 580px;
  line-height: 1.6;
}

/* Problem section */
.about-problem {
  margin-bottom: 36px;
}
.about-problem-text {
  display: grid;
  gap: 14px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
}
.about-emphasis {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--brand);
  border-left: 4px solid var(--brand);
  padding-left: 14px;
  margin-top: 4px;
}

/* Purpose / What it does */
.about-purpose {
  margin-bottom: 40px;
}
.about-section-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 0.78rem;
  margin-bottom: 14px;
  color: var(--muted);
}
.about-purpose > p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 22px;
  color: var(--ink);
}
.about-two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.about-topic-card {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 16px;
  display: grid;
  gap: 6px;
}
.about-topic-icon {
  font-size: 1.4rem;
  line-height: 1;
}
.about-topic-card strong {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--ink);
  display: block;
}
.about-topic-card p {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
}

/* Why section */
.about-why {
  margin-bottom: 36px;
}
.about-why > p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 16px;
  color: var(--ink);
}
.about-goal-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.about-goal-list li {
  padding: 10px 14px 10px 44px;
  background: var(--brand-soft);
  border-radius: 8px;
  font-size: 0.93rem;
  color: var(--ink);
  position: relative;
  line-height: 1.5;
}
.about-goal-list li::before {
  content: "✓";
  position: absolute;
  left: 14px;
  color: var(--brand);
  font-weight: 900;
  font-size: 0.85rem;
}

/* Disclaimer */
.about-disclaimer {
  background: #fffbf2;
  border: 1px solid #f0d070;
  border-left: 4px solid #e8b800;
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 36px;
  display: grid;
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink);
}

/* Author footer */
.about-author {
  border-top: 1px solid var(--line);
  padding-top: 28px;
}
.about-author-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.about-author-meta {
  display: grid;
  gap: 3px;
}
.about-author-name {
  font-size: 1rem;
  font-weight: 900;
  color: var(--ink);
}
.about-author-role {
  font-size: 0.88rem;
  color: var(--muted);
}
.about-author-site {
  font-size: 0.85rem;
  color: var(--brand);
  font-weight: 700;
  text-decoration: none;
}
.about-author-site:hover { text-decoration: underline; }
.about-version-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--brand-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 18px;
  gap: 2px;
  flex-shrink: 0;
}
.about-version-label {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
}
.about-version-num {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--brand);
  letter-spacing: -0.5px;
}

/* Responsive */
@media (max-width: 620px) {
  .about-two-col { grid-template-columns: 1fr; }
  .about-author-inner { flex-direction: column; align-items: flex-start; }
}

/* ── Ventilation workspace: isolated from global language toggle ──────────── */
/* Show all en-block and ar-block content inside ventilation always */
body[data-language-mode] #ventilationMount .en-block { display: inline !important; }
body[data-language-mode] #ventilationMount .ar-block,
body[data-language-mode] #ventilationMount .ar       { display: inline !important; }
body[data-language-mode] #ventilationMount .mv-tab-btn .en-block,
body[data-language-mode] #ventilationMount .mv-tab-btn .ar-block { display: inline !important; }

/* ── Ventilation: surgical button reset — min-height only ────────────────── */
/* The global app CSS sets min-height:42px on ALL buttons. This crushes MV layout.
   Only reset min-height here. Never touch background/color/font — let MV CSS own those. */
#ventilationMount button {
  min-height: unset !important;
}
/* Help ? buttons: must be perfectly circular */
#ventilationMount .help-btn,
#ventilationMount .lm-help {
  width: 16px !important;
  height: 16px !important;
  border-radius: 50% !important;
  padding: 0 !important;
  line-height: 1 !important;
}
/* Hard refresh in footer: circular */
.hard-refresh-btn {
  border-radius: 50% !important;
  width: 22px !important;
  height: 22px !important;
  min-height: unset !important;
  padding: 0 !important;
}
/* MV sub-tab buttons in the dark bar */
#ventilationMount .mv-tab-btn {
  height: 40px !important;
  border-radius: 0 !important;
  padding: 0 18px !important;
  background: none !important;
  color: rgba(255,255,255,.55) !important;
  font-size: 13px !important;
  font-weight: 500 !important;
  border-bottom: 2px solid transparent !important;
}
#ventilationMount .mv-tab-btn.active {
  color: #fff !important;
  border-bottom-color: #fff !important;
}


/* ═══════════════════════════════════════════════════════════════
   MOBILE OPTIMISATION
═══════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .command-nav {
    flex-wrap: nowrap;
    padding: 0 10px;
    gap: 6px;
  }
  .command-links {
    gap: 2px;
    overflow-x: auto;
    flex-shrink: 1;
  }
  .workspace-btn {
    font-size: 12px;
    padding: 0 8px;
    white-space: nowrap;
  }
  .command-lang .mode-btn {
    padding: 3px 5px;
    font-size: 10px;
  }
  .command-search {
    display: none;
  }
  .home-two-col,
  .about-two-col {
    grid-template-columns: 1fr !important;
  }
  .app-footer {
    font-size: 10px;
    gap: 5px;
  }
}
@media (max-width: 768px) {
  /* Ventilation: stack sim controls above charts on narrow screens */
  #ventilationMount .sim-wrap {
    grid-template-columns: 1fr !important;
  }
  #ventilationMount .sim-controls {
    height: auto !important;
    max-height: 45vh;
    overflow-y: auto;
  }
}


/* ═══════════════════════════════════════════════════════════════
   HAMBURGER / MOBILE NAV (IDG pattern)
═══════════════════════════════════════════════════════════════ */
.nav-hamburger {
  display: none;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 8px;
  min-height: unset !important;
  width: 44px; height: 44px;
  padding: 0;
  cursor: pointer;
  color: #fff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1px;
  flex-shrink: 0;
  transition: background .15s;
}
.nav-hamburger:hover { background: rgba(255,255,255,.18); }
.nav-hamburger-icon  { font-size: 18px; line-height: 1; }
.nav-hamburger-label { font-size: 8px; letter-spacing: .8px; text-transform: uppercase;
  font-weight: 600; opacity: .8; line-height: 1; }

@media (max-width: 760px) {
  /* Show hamburger, hide inline links */
  .nav-hamburger { display: flex; }
  /* Hide nav links on mobile — menu is served via #mobileMenuPortal */
  .command-links { display: none !important; }
  /* Nuclear specificity — id beats class, guarantees hidden on mobile */
  #commandLinks { 
    visibility: hidden !important;
    position: absolute !important;
    width: 0 !important; height: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
    opacity: 0 !important;
  }
  .command-links .workspace-btn {
    width: 100%;
    justify-content: space-between;
    align-items: center;
    padding: 13px 14px;
    font-size: 14px;
    border-radius: 0;
    border-bottom: 1px solid rgba(255,255,255,.07);
    text-align: left;
    background: transparent;
    color: rgba(255,255,255,.75);
  }
  .command-links .workspace-btn.active,
  .command-links .workspace-btn:hover {
    background: rgba(255,255,255,.08);
    color: #fff;
  }
  .command-links .workspace-btn:last-child { border-bottom: none; }
  /* EN on left, AR on right — inline */
  .command-links .workspace-btn .en-block { font-weight: 700; }
  .command-links .workspace-btn .ar-block,
  .command-links .workspace-btn .ar {
    font-size: 12px !important;
    opacity: .6;
    font-weight: 400 !important;
  }
  /* Lang + search stay in nav bar */
  .command-lang { order: 2; }
  .command-search { display: none; }
  /* Keep nav layout clean */
  .command-nav {
    position: relative;
    flex-wrap: nowrap;
  }
}
@media (max-width: 480px) {
  .command-brand strong { font-size: 13px; }
  .command-brand small  { display: none; }
}

/* ════════════════════════════════════════════════════════════
   TRAINING SIDEBAR: NO GREY BOX — DEFINITIVE OVERRIDE
   The combined .panel-block,.section-nav rule at the top of
   the file applies background + border. Kill it completely for
   every element in the training sidebar.
════════════════════════════════════════════════════════════ */
body[data-workspace="training"] .side-panel,
body[data-workspace="training"] .side-panel *:not(input):not(button):not(ol):not(li):not(a):not(span) {
  background: transparent !important;
  border: 0 !important;
  box-shadow: none !important;
  padding: 0 !important;
}
/* Restore functional spacing */
body[data-workspace="training"] .panel-view {
  padding: 0 12px !important;
  display: grid !important;
  gap: 10px !important;
}
body[data-workspace="training"] .section-nav {
  padding: 0 12px 12px !important;
}
body[data-workspace="training"] .section-nav ol {
  padding: 0 !important;
}

/* ── About: endorsements ──────────────────────────────────────────────── */
.about-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--brand);
  margin-bottom: 10px;
}
.about-endorsements-intro {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.65;
}
.about-rec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.about-rec-card {
  margin: 0;
  padding: 22px 22px 18px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}
.about-rec-flag {
  font-size: 1.5rem;
  line-height: 1;
}
.about-rec-text {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--ink);
  font-style: italic;
  margin: 0;
  flex: 1;
}
.about-rec-text::before {
  content: '\201C';
  font-size: 2.5rem;
  color: var(--brand);
  opacity: .25;
  line-height: 0;
  vertical-align: -0.5rem;
  margin-right: 4px;
  font-style: normal;
}
.about-rec-author {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.about-rec-author strong {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--ink);
}
.about-rec-author span {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}
.about-rec-cred {
  font-size: 0.75rem !important;
  color: var(--brand) !important;
  font-weight: 600 !important;
  margin-top: 2px;
}
@media (max-width: 640px) {
  .about-rec-grid { grid-template-columns: 1fr; }
}
/* Rename .about-block to match our existing .about-problem/.about-purpose/.about-why */
.about-block {
  margin-bottom: 40px;
}
.about-block > p {
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 14px;
  color: var(--ink);
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE MENU PORTAL
   Direct body child — no sticky/transform ancestor interference.
   Position: fixed works reliably here on all browsers.
═══════════════════════════════════════════════════════════════ */
.mobile-menu-portal {
  display: none;
  position: fixed;
  top: 56px; left: 0; right: 0;
  z-index: 9900;
  background: #0b1d2e;
  flex-direction: column;
  padding: 8px 0 16px;
  border-bottom: 2px solid rgba(255,255,255,.12);
  box-shadow: 0 16px 40px rgba(0,0,0,.5);
  max-height: calc(100dvh - 56px);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.mobile-menu-portal.open { display: flex; }

/* Backdrop overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 56px 0 0 0;
  z-index: 9800;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.mobile-menu-overlay.open { display: block; }

/* Portal buttons */
.portal-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 20px;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,.07);
  color: rgba(255,255,255,.7);
  text-align: left;
  cursor: pointer;
  min-height: unset !important;
  border-radius: 0 !important;
  transition: background .12s;
}
.portal-btn:last-child { border-bottom: none; }
.portal-btn:hover,
.portal-btn:active { background: rgba(255,255,255,.1); color: #fff; }
.portal-btn.active  { background: rgba(255,255,255,.08); color: #fff; }
.portal-btn-en {
  font-size: 15px;
  font-weight: 700;
  color: inherit;
}
.portal-btn-ar {
  font-size: 12px;
  opacity: .55;
  font-family: inherit;
}
.portal-btn.active .portal-btn-en { color: #fff; }
.portal-btn.active .portal-btn-ar { opacity: .8; }