:root {
  --bg: #edf2ef;
  --surface: #fbfcfb;
  --surface-2: #f2f5f3;
  --line: #c8d2cd;
  --line-strong: #aab8b1;
  --ink: #16201d;
  --muted: #5e6d66;
  --teal: #0c7369;
  --teal-soft: #dceeea;
  --blue: #2e6286;
  --blue-soft: #ddeaf3;
  --amber: #a95a10;
  --amber-soft: #f7ead7;
  --red: #aa3434;
  --red-soft: #f6dddd;
  --green: #28734c;
  --green-soft: #dcefe3;
  --shadow: 0 8px 24px rgba(18, 35, 29, 0.06);
  --radius: 8px;
  --sidebar: 232px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}

button,
input,
select {
  font: inherit;
}

button {
  color: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 20px 14px 16px;
  background: #17231f;
  color: #edf3f0;
  border-right: 1px solid #101a17;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 0 6px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
  padding: 7px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 7px;
}

.brand-mark span {
  display: block;
  background: #70c2b6;
  border-radius: 1px;
}

.brand-mark span:nth-child(1) { height: 45%; }
.brand-mark span:nth-child(2) { height: 90%; }
.brand-mark span:nth-child(3) { height: 65%; }

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 14px;
  letter-spacing: 0.01em;
}

.brand small {
  margin-top: 2px;
  color: #aebdb7;
  font-size: 11px;
}

.system-state {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 7px;
}

.system-state strong,
.system-state small {
  display: block;
}

.system-state strong { font-size: 12px; }
.system-state small { color: #9fb0a9; font-size: 10px; margin-top: 2px; }

.state-dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #74c59d;
  box-shadow: 0 0 0 4px rgba(116, 197, 157, 0.13);
}

.state-dot.demo { background: #d59b43; box-shadow: 0 0 0 4px rgba(213, 155, 67, 0.14); }
.state-dot.live { background: #78cf9f; box-shadow: 0 0 0 4px rgba(120, 207, 159, 0.14); }
.state-dot.error { background: #d16a62; box-shadow: 0 0 0 4px rgba(209, 106, 98, 0.14); }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 11px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: #becbc6;
  cursor: pointer;
  text-align: left;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}

.nav-item svg {
  width: 17px;
  height: 17px;
  stroke-width: 1.8;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-item.is-active {
  background: #263a34;
  border-color: #38564d;
  color: #fff;
}

.sidebar-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mini-label {
  margin-bottom: 6px;
  color: #9fafaa;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sidebar-foot p {
  margin: 9px 2px 0;
  color: #91a29c;
  font-size: 10px;
  line-height: 1.5;
}

.workspace {
  min-width: 0;
  padding: 0 24px 28px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 -24px 20px;
  padding: 18px 24px 16px;
  background: rgba(237, 242, 239, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.title-block { min-width: 0; }

.eyebrow {
  margin-bottom: 3px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.title-block h1 {
  margin: 0;
  font-size: 21px;
  line-height: 1.25;
}

.title-block p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.topbar-actions,
.inline-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn,
.file-button,
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease;
}

.btn svg,
.file-button svg,
.icon-btn svg {
  width: 15px;
  height: 15px;
  stroke-width: 1.8;
}

.btn:disabled, .icon-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn:hover,
.file-button:hover,
.icon-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.btn.primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.btn.primary:hover {
  background: #095f57;
  color: #fff;
}

.btn.secondary { background: var(--surface); }

.btn.small {
  min-height: 30px;
  padding: 0 9px;
  font-size: 12px;
}

.icon-btn {
  width: 34px;
  min-height: 34px;
  padding: 0;
}

.view {
  display: none;
}

.empty-state { display: none; min-height: 270px; flex-direction: column; align-items: center; justify-content: center; padding: 36px 20px; color: var(--muted); text-align: center; background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius); }
.empty-state svg { width: 30px; height: 30px; margin-bottom: 12px; color: var(--teal); }
.empty-state h2 { margin: 0; color: var(--ink); font-size: 16px; }
.empty-state p { max-width: 620px; margin: 7px 0 0; font-size: 11px; line-height: 1.6; }
body:not(.has-experiment-data) .requires-data { display: none !important; }
body:not(.has-experiment-data) .empty-state { display: flex; }
body:not(.has-experiment-data) .chart-panel:has(#realtimeChart) { display: none; }
body.has-experiment-data .empty-state { display: none; }

.view.is-active {
  display: block;
  animation: view-in 160ms ease-out;
}

@keyframes view-in {
  from { opacity: 0; transform: translateY(3px); }
  to { opacity: 1; transform: none; }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  margin: 0;
  font-size: 14px;
  line-height: 1.3;
}

.panel-head p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.metric {
  min-height: 92px;
  padding: 13px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.metric > span {
  color: var(--muted);
  font-size: 11px;
}

.metric strong {
  display: block;
  margin: 9px 0 3px;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 22px;
  line-height: 1;
}

.metric small {
  color: var(--muted);
  font-size: 10px;
}

.grade-metric strong { font-family: inherit; font-size: 19px; }

@media (min-width: 901px) {
  .usb-layout { grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr); }
  .usb-controls { border-right: 1px solid var(--line); border-bottom: 0; }
  .usb-form { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
  .usb-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1180px) {
  .learning-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-controls { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
}

@media (max-width: 900px) {
  .learning-grid { grid-template-columns: 1fr; }
  .model-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quiz-list { grid-template-columns: 1fr; }
  .quiz-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .quiz-item:last-child { border-bottom: 0; }
  .learning-summary { align-items: flex-start; flex-direction: column; }
  .learning-summary-actions { width: 100%; }
}

@media (max-width: 620px) {
  .csv-map-grid { grid-template-columns: 1fr; }
  .csv-map-backdrop { padding: 10px; align-items: end; }
  .csv-map-dialog { max-height: 94vh; }
  .model-controls { grid-template-columns: 1fr; }
  .prediction-metrics { grid-template-columns: 1fr 1fr; }
  .prediction-metrics > div:nth-child(2n) { border-right: 0; }
  .guidance-item { grid-template-columns: 9px 1fr; }
  .guidance-action { max-width: none; grid-column: 2; text-align: left; }
}
.analysis-grid,
.inversion-grid,
.quality-grid,
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.span-2 { grid-column: span 2; }

.chart-panel {
  min-width: 0;
  overflow: hidden;
}

.chart-wrap {
  position: relative;
  padding: 10px 12px 4px;
}

.dashboard-chart { height: 390px; }
.analysis-chart { height: 420px; }
.derivative-chart { height: 230px; }
.inversion-chart { height: 320px; }
.uncertainty-chart { height: 285px; }
.compare-chart { height: 390px; }

.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 5px 16px 13px;
  color: var(--muted);
  font-size: 11px;
}

.legend-line {
  display: inline-block;
  width: 20px;
  height: 2px;
  margin-right: 6px;
  vertical-align: middle;
}

.legend-line.sample { background: var(--teal); }
.legend-line.reference { background: var(--blue); }
.legend-line.ambient { background: var(--amber); }

.run-panel,
.events-panel,
.method-panel,
.feature-panel {
  overflow: hidden;
}

.custom-material-grid { display: none; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; padding: 0 16px 12px; }
.custom-material-grid.is-visible { display: grid; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
  padding: 14px 16px 12px;
}

.settings-health {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.settings-health > div {
  min-width: 0;
  padding: 10px 12px;
  background: var(--surface-2);
}

.settings-health span,
.settings-health strong {
  display: block;
}

.settings-health span {
  color: var(--muted);
  font-size: 10px;
}

.settings-health strong {
  margin-top: 5px;
  overflow: hidden;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#setupHealthBadge.ok { color: var(--green); }
#setupHealthBadge.warn { color: var(--amber); }
#setupHealthBadge.error { color: var(--red); }

.settings-section-title {
  grid-column: 1 / -1;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 2px;
  flex-wrap: wrap;
}

.settings-section-title span {
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.settings-section-title small {
  color: var(--muted);
  font-size: 9px;
  text-align: right;
}

.input-with-action {
.field-block {
  color: var(--muted);
  font-size: 11px;
}

  display: grid;
  grid-template-columns: minmax(0, 1fr) 34px;
  gap: 6px;
  margin-top: 5px;
}

.input-with-action .input {
  margin-top: 0;
}

.settings-advanced {
  margin: 2px 16px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
}

.settings-advanced summary {
  padding: 9px 11px;
  color: var(--muted);
  cursor: pointer;
  font-size: 10px;
}

.settings-advanced[open] summary {
  border-bottom: 1px solid var(--line);
}

.settings-advanced .form-grid {
  padding: 11px;
}

.settings-suggestion {
  display: grid;
  gap: 9px;
  padding: 0 16px 14px;
}

.settings-suggestion p {
  margin: 0;
  padding: 9px 10px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 10px;
  line-height: 1.55;
}

.settings-suggestion .btn {
  justify-self: start;
}

label {
  color: var(--muted);
  font-size: 11px;
}

.input,
.select {
  display: block;
  width: 100%;
  min-height: 34px;
  margin-top: 5px;
  padding: 0 9px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  outline: none;
}

.input:focus,
.select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 2px var(--teal-soft);
}

.select.compact {
  min-height: 30px;
  margin-top: 0;
  color: #e9f1ee;
  background: #20322c;
  border-color: #3d574f;
}

.device-list {
  display: grid;
  gap: 0;
  padding: 2px 16px 14px;
}

.device-list > div {
  display: grid;
  grid-template-columns: 10px 1fr;
  align-items: center;
  column-gap: 8px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.device-list strong { font-size: 12px; }
.device-list small { grid-column: 2; color: var(--muted); font-size: 10px; margin-top: 2px; }

.device-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-strong);
}

.device-dot.ok { background: var(--green); }
.device-dot.warn { background: var(--amber); }
.device-dot.bad { background: var(--red); }

.event-list {
  max-height: 310px;
  overflow: auto;
  padding: 8px 16px 13px;
}

.event-item {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 9px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 11px;
}

.event-item:last-child { border-bottom: 0; }
.event-item time { color: var(--muted); font-family: "Cascadia Mono", Consolas, monospace; }
.event-item p { margin: 0; line-height: 1.45; }
.event-item.info p { color: var(--blue); }
.event-item.warn p { color: var(--amber); }
.event-item.error p { color: var(--red); }

.method-panel {
  padding-bottom: 14px;
}

.method-equation {
  padding: 16px;
}

.method-equation code {
  display: inline-block;
  padding: 5px 7px;
  color: #fff;
  background: #253d35;
  border-radius: 4px;
  font-size: 13px;
}

.method-equation p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.method-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding: 0 16px;
}

.method-tags span {
  padding: 5px 8px;
  color: #2d4d43;
  background: var(--teal-soft);
  border-radius: 4px;
  font-size: 10px;
}

.compact-panel {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  margin-bottom: 14px;
  padding: 12px 14px;
}

.compact-panel label { min-width: 120px; }
.compact-panel .select { min-width: 240px; }
.compact-input { width: 110px; }

.toolbar-note {
  margin-left: auto;
  color: var(--muted);
  font-size: 11px;
}

.status-chip {
  padding: 4px 8px;
  color: var(--teal);
  background: var(--teal-soft);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
}

.feature-list {
  padding: 8px 16px 14px;
}

.feature-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.feature-row:last-child { border-bottom: 0; }
.feature-row span { color: var(--muted); font-size: 11px; }
.feature-row strong { font-family: "Cascadia Mono", Consolas, monospace; font-size: 12px; }

.table-panel { overflow: hidden; }

.data-table-wrap {
  max-height: 420px;
  overflow: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 10px 12px;
  color: #eaf1ee;
  background: #263a34;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.data-table tbody tr:hover { background: var(--surface-2); }

.inversion-metrics {
  grid-template-columns: repeat(5, minmax(130px, 1fr));
}

.quality-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 18px 20px;
  margin-bottom: 14px;
}

.grade-block {
  display: flex;
  align-items: center;
  gap: 18px;
}

.grade-ring {
  width: 90px;
  height: 90px;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 7px solid var(--line);
  border-radius: 50%;
}

.grade-ring strong { font-size: 21px; }
.grade-ring small { color: var(--muted); font-size: 9px; }

.grade-block h2 { margin: 0; font-size: 18px; }
.grade-block p { margin: 6px 0 0; color: var(--muted); font-size: 12px; }

.quality-score {
  text-align: right;
}

.quality-score span,
.quality-score small {
  display: block;
  color: var(--muted);
  font-size: 10px;
}

.quality-score strong {
  display: inline-block;
  margin: 4px 2px 0 0;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 34px;
}

.rule-list {
  padding: 8px 16px 14px;
}

.rule-row {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 10px;
  align-items: start;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.rule-row:last-child { border-bottom: 0; }
.rule-row strong { display: block; font-size: 12px; }
.rule-row p { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.45; }
.rule-level { margin-top: 2px; font-size: 11px; font-weight: 700; }
.rule-dot { width: 8px; height: 8px; margin-top: 4px; border-radius: 50%; }
.green .rule-dot { background: var(--green); }
.yellow .rule-dot { background: var(--amber); }
.red .rule-dot { background: var(--red); }
.green .rule-level { color: var(--green); }
.yellow .rule-level { color: var(--amber); }
.red .rule-level { color: var(--red); }

.stat-list {
  padding: 10px 16px 15px;
}

.stat-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.stat-row:last-child { border-bottom: 0; }
.stat-row span { color: var(--muted); font-size: 11px; }
.stat-row strong { font-family: "Cascadia Mono", Consolas, monospace; font-size: 13px; }

.report-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 14px;
}

.report-preview { min-width: 0; }

.report-sheet {
  min-height: 720px;
  padding: 28px 34px;
  background: #fff;
  color: #1e2825;
  font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
}

.report-sheet h2 {
  margin: 0 0 4px;
  font-size: 22px;
}

.report-sheet .report-meta {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 11px;
}

.report-sheet h3 {
  margin: 24px 0 9px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.report-sheet p,
.report-sheet li {
  color: #45514d;
  font-size: 12px;
  line-height: 1.7;
}

.report-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 12px 0;
}

.report-grid > div {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.report-grid span { display: block; color: var(--muted); font-size: 9px; }
.report-grid strong { display: block; margin-top: 5px; font-family: "Cascadia Mono", Consolas, monospace; font-size: 13px; }

.report-controls {
  align-self: start;
  padding-bottom: 16px;
}

.report-controls .check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  color: var(--ink);
  font-size: 11px;
  border-bottom: 1px solid var(--line);
}

.report-controls .check-row input {
  width: 15px;
  height: 15px;
  accent-color: var(--teal);
}

.report-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 14px 16px 0;
  padding: 10px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 10px;
  line-height: 1.5;
}

.report-note svg { width: 15px; height: 15px; flex: 0 0 auto; }
.report-note p { margin: 0; }

.csv-map-backdrop { position: fixed; inset: 0; z-index: 120; display: grid; place-items: center; padding: 20px; background: rgba(16, 28, 24, 0.52); }
.csv-map-backdrop[hidden] { display: none; }
.csv-map-dialog { width: min(760px, 100%); max-height: 90vh; overflow: auto; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 8px; box-shadow: 0 22px 60px rgba(10, 25, 20, 0.26); }
.csv-map-dialog > header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 15px 17px; border-bottom: 1px solid var(--line); }
.csv-map-dialog h2 { margin: 0; font-size: 16px; }
.csv-map-dialog header p { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.csv-map-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 11px; padding: 15px 17px; }
.csv-map-preview { margin: 0 17px 15px; padding: 10px; max-height: 160px; overflow: auto; color: #c9eee4; background: #1b2723; border-radius: 5px; font-family: "Cascadia Mono", Consolas, monospace; font-size: 10px; white-space: pre; }
.csv-map-dialog > footer { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 17px; border-top: 1px solid var(--line); }

.toast-region {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  display: grid;
  gap: 8px;
}

.toast {
  min-width: 240px;
  max-width: 360px;
  padding: 11px 13px;
  background: #1d2d28;
  color: #fff;
  border-radius: 6px;
  box-shadow: var(--shadow);
  font-size: 11px;
  animation: toast-in 140ms ease-out;
}

.toast.error { background: #822f2f; }
.toast.warn { background: #7d4a14; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 1180px) {
  .metric-strip,
  .inversion-metrics { grid-template-columns: repeat(3, minmax(130px, 1fr)); }
  .dashboard-grid,
  .analysis-grid,
  .inversion-grid,
  .quality-grid,
  .compare-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .span-2 { grid-column: span 2; }
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: sticky;
    top: 0;
    height: auto;
    min-width: 0;
    overflow: hidden;
    padding: 10px 12px;
    gap: 10px;
  }
  .brand { padding-bottom: 10px; }
  .system-state,
  .sidebar-foot { display: none; }
  .nav-list {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 2px;
  }
  .nav-item {
    width: auto;
    flex: 0 0 auto;
    padding: 8px 10px;
  }
  .workspace { padding: 0 14px 22px; }
  .topbar {
    position: static;
    margin: 0 -14px 14px;
    padding: 14px;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
  .topbar-actions { width: 100%; }
  .metric-strip,
  .inversion-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-grid,
  .analysis-grid,
  .inversion-grid,
  .quality-grid,
  .compare-grid { grid-template-columns: 1fr; }
  .span-2 { grid-column: span 1; }
  .report-layout { grid-template-columns: 1fr; }
  .report-sheet { padding: 22px 18px; }
}

@media (max-width: 620px) {
  .metric-strip,
  .inversion-metrics { grid-template-columns: 1fr 1fr; }
  .settings-health { grid-template-columns: 1fr 1fr; }
  .settings-health > div:last-child { grid-column: 1 / -1; }
  .metric { min-height: 82px; }
  .form-grid { grid-template-columns: 1fr; }
  .compact-panel { align-items: stretch; flex-direction: column; }
  .compact-panel label,
  .compact-panel .select,
  .compact-input { width: 100%; min-width: 0; }
  .toolbar-note { margin-left: 0; }
  .quality-summary { align-items: flex-start; flex-direction: column; }
  .quality-score { text-align: left; }
  .report-grid { grid-template-columns: 1fr 1fr; }
}
.usb-panel { overflow: hidden; }
.usb-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: 0; }
.usb-controls { padding: 14px 16px; border-right: 1px solid var(--line); }
.usb-action-row { display: flex; flex-wrap: wrap; gap: 8px; }
.usb-form { display: grid; grid-template-columns: repeat(3, minmax(120px, 1fr)); gap: 10px; margin-top: 13px; }
.usb-hint { margin: 12px 0 0; color: var(--muted); font-size: 10px; line-height: 1.55; }
.usb-hint code { padding: 1px 4px; background: var(--surface-2); border-radius: 3px; }
.usb-monitor { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px; background: #f7f9f8; }
.usb-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.usb-stats > div { padding: 9px 10px; background: var(--surface); border: 1px solid var(--line); border-radius: 5px; min-width: 0; }
.usb-stats span, .usb-stats strong { display: block; }
.usb-stats span { color: var(--muted); font-size: 10px; }
.usb-stats strong { margin-top: 5px; overflow: hidden; text-overflow: ellipsis; font-family: "Cascadia Mono", Consolas, monospace; font-size: 13px; white-space: nowrap; }
.usb-last-line { min-height: 104px; margin: 0; padding: 10px; overflow: auto; color: #b9e4d9; background: #1b2723; border-radius: 5px; font-family: "Cascadia Mono", Consolas, monospace; font-size: 10px; line-height: 1.5; white-space: pre-wrap; word-break: break-all; }

  .usb-layout { grid-template-columns: 1fr; }
  .usb-controls { border-right: 0; border-bottom: 1px solid var(--line); }
  .usb-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .usb-form { grid-template-columns: 1fr; }
  .usb-stats { grid-template-columns: 1fr; }
.learning-summary { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 17px 19px; margin-bottom: 14px; }
.learning-summary h2 { margin: 0; font-size: 18px; }
.learning-summary p { max-width: 760px; margin: 6px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.learning-summary-actions { display: flex; align-items: flex-end; gap: 10px; }
.learning-summary-actions label { min-width: 130px; }
.learning-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.model-controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; padding: 12px 16px 2px; }
.model-controls.minimal { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); align-items: end; }
#virtualNameInputLabel[hidden], #experimentCustomNameLabel[hidden] { display: none; }
.auto-calibration { margin-top: 18px; padding: 8px 10px; background: var(--teal-soft); border-radius: 5px; }
.model-parameter-status { margin: 10px 16px 0; padding: 8px 10px; color: var(--muted); background: var(--surface-2); border: 1px solid var(--line); border-radius: 5px; font-size: 10px; line-height: 1.5; }
.advanced-model-params { margin: 10px 16px 14px; border: 1px solid var(--line); border-radius: 6px; }
.advanced-model-params summary { padding: 9px 11px; color: var(--muted); cursor: pointer; font-size: 10px; }
.advanced-model-grid { display: grid; grid-template-columns: repeat(5, minmax(120px, 1fr)); gap: 10px; padding: 2px 11px 12px; }
.check-inline { display: flex; align-items: center; gap: 7px; min-height: 34px; margin-top: 18px; color: var(--ink); }
.check-inline input { width: 15px; height: 15px; accent-color: var(--teal); }
.prediction-chart { height: 330px; }
.prediction-metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.prediction-metrics > div { padding: 11px 14px; border-right: 1px solid var(--line); }
.prediction-metrics > div:last-child { border-right: 0; }
.prediction-metrics span, .prediction-metrics strong { display: block; }
.prediction-metrics span { color: var(--muted); font-size: 10px; }
.prediction-metrics strong { margin-top: 5px; font-family: "Cascadia Mono", Consolas, monospace; font-size: 15px; }
.learning-progress { padding: 8px 16px 14px; }
.progress-step { display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.progress-step:last-child { border-bottom: 0; }
.progress-index { width: 25px; height: 25px; display: grid; place-items: center; color: var(--muted); background: var(--surface-2); border: 1px solid var(--line); border-radius: 50%; font-family: "Cascadia Mono", Consolas, monospace; font-size: 10px; }
.progress-step.done .progress-index { color: #fff; background: var(--green); border-color: var(--green); }
.progress-step strong { display: block; font-size: 12px; }
.progress-step p { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.45; }
.ability-chart { height: 265px; }
.ability-footer { display: flex; align-items: baseline; gap: 8px; padding: 0 16px 14px; border-top: 1px solid var(--line); }
.ability-footer strong { color: var(--teal); font-family: "Cascadia Mono", Consolas, monospace; font-size: 26px; }
.ability-footer span { color: var(--muted); font-size: 11px; }
.guidance-list { padding: 8px 16px 14px; }
.guidance-item { display: grid; grid-template-columns: 9px 1fr auto; gap: 10px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.guidance-item:last-child { border-bottom: 0; }
.guidance-item .rule-dot { margin-top: 4px; }
.guidance-item strong { display: block; font-size: 12px; }
.guidance-item p { margin: 4px 0 0; color: var(--muted); font-size: 10px; line-height: 1.5; }
.guidance-action { max-width: 260px; color: var(--ink); font-size: 10px; line-height: 1.45; text-align: right; }
.quiz-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
.quiz-item { padding: 14px 16px; border-right: 1px solid var(--line); }
.quiz-item:last-child { border-right: 0; }
.quiz-item h3 { margin: 0 0 10px; font-size: 12px; line-height: 1.45; }
.quiz-option { width: 100%; margin: 6px 0; padding: 8px 9px; text-align: left; background: var(--surface); color: var(--ink); border: 1px solid var(--line); border-radius: 5px; cursor: pointer; font-size: 10px; line-height: 1.4; }
.quiz-option:hover { border-color: var(--teal); }
.quiz-option.correct { color: var(--green); background: var(--green-soft); border-color: var(--green); }
.quiz-option.incorrect { color: var(--red); background: var(--red-soft); border-color: var(--red); }
.quiz-feedback { margin: 10px 0 0; color: var(--muted); font-size: 10px; line-height: 1.5; }

@media (max-width: 900px) {
  .model-controls.minimal { grid-template-columns: 1fr; }
  .advanced-model-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .advanced-model-grid { grid-template-columns: 1fr; }
}

@media (min-width: 901px) {
  .usb-layout { grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr); }
  .usb-controls { border-right: 1px solid var(--line); border-bottom: 0; }
  .usb-form { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
  .usb-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1180px) {
  .learning-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-controls { grid-template-columns: repeat(3, minmax(120px, 1fr)); }
}

@media (max-width: 900px) {
  .learning-grid { grid-template-columns: 1fr; }
  .model-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quiz-list { grid-template-columns: 1fr; }
  .quiz-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .quiz-item:last-child { border-bottom: 0; }
  .learning-summary { align-items: flex-start; flex-direction: column; }
  .learning-summary-actions { width: 100%; }
}

@media (max-width: 620px) {
  .model-controls { grid-template-columns: 1fr; }
  .prediction-metrics { grid-template-columns: 1fr 1fr; }
  .prediction-metrics > div:nth-child(2n) { border-right: 0; }
  .guidance-item { grid-template-columns: 9px 1fr; }
  .guidance-action { max-width: none; grid-column: 2; text-align: left; }
}

/* ---------- v2: provenance, project archive, calibration wizard, scenes ---------- */

.sidebar-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.sidebar-hash {
  margin: 8px 0 0;
  font-size: 11px;
  color: #6d7974;
  word-break: break-all;
}

.prov-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid transparent;
}
.prov-sim { background: #f3ead9; color: #8a5a10; border-color: #e2cfa8; }
.prov-import { background: #e2edf5; color: #235c85; border-color: #bcd4e6; }
.prov-serial { background: #dcefe3; color: #1d6b45; border-color: #b6ddc6; }
.prov-none { background: #ecefed; color: #6d7974; border-color: #d6dcda; }

.status-chip.is-green { background: #dcefe3; color: #1d6b45; border-color: #b6ddc6; }
.status-chip.is-amber { background: #f7ead7; color: #8a5a10; border-color: #e2cfa8; }

.file-button.secondary {
  background: #ffffff;
  color: #23514a;
  border: 1px solid #c4d2cd;
}

.biot-readout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding: 8px 10px;
  background: #f3f7f5;
  border: 1px solid #dbe4e0;
  border-radius: 6px;
}
.biot-readout span { font-size: 12px; color: #5e6d66; }
.biot-readout strong { font-size: 13px; }
.biot-green { color: #1d6b45; }
.biot-yellow { color: #8a5a10; }
.biot-red { color: #a53434; }
.biot-note { margin: 6px 2px 0; font-size: 11px; color: #6d7974; }

.scene-wrap {
  width: 100%;
  overflow-x: auto;
}
.scene-svg { width: 100%; min-width: 640px; height: auto; display: block; }
.scene-title { font-size: 15px; font-weight: 700; fill: #1e2825; }
.scene-note { font-size: 11px; fill: #8a5a10; }
.scene-label { font-size: 12px; font-weight: 600; fill: #23514a; }
.scene-small { font-size: 10.5px; fill: #4d5b56; }
.scene-stage rect { fill: #eef3f1; stroke: #d3ded9; }
.scene-stage.is-active rect { fill: #e3f2ea; stroke: #9ccbb2; }

.project-head { display: flex; flex-direction: column; gap: 12px; }
.project-head-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.project-form-row { display: flex; flex-wrap: wrap; gap: 12px; }
.project-form-row label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: #5e6d66; min-width: 260px; }
.project-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.project-stats > div { background: #f5f8f7; border: 1px solid #e0e8e5; border-radius: 6px; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
.project-stats span { font-size: 11px; color: #6d7974; }
.project-stats strong { font-size: 20px; }
.project-meta-line { margin: 0; font-size: 12px; color: #6d7974; }
.project-danger { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-left: 3px solid #d8b28b; }
.project-danger h2 { margin: 0 0 4px; font-size: 15px; }
.project-danger p { margin: 0; font-size: 12px; color: #6d7974; }
.mono { font-family: Consolas, "Courier New", monospace; font-size: 12px; }
.stale-badge { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 999px; background: #f7ead7; color: #8a5a10; font-size: 10.5px; }
.icon-btn.tiny { width: 26px; height: 26px; }
.icon-btn.tiny svg { width: 14px; height: 14px; }

.dialog-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 32, 29, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 40;
}
.dialog-backdrop[hidden] { display: none; }
.dialog { background: #ffffff; border-radius: 10px; width: min(860px, 96vw); max-height: 90vh; overflow: auto; box-shadow: 0 24px 60px rgba(16, 32, 28, 0.28); }
.dialog-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 18px 20px 12px; border-bottom: 1px solid #e4ebe8; }
.dialog-head h2 { margin: 0 0 4px; font-size: 18px; }
.dialog-head p { margin: 0; font-size: 12px; color: #6d7974; }
.dialog-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px 18px; border-top: 1px solid #e4ebe8; }
.wizard-chips { display: flex; flex-wrap: wrap; gap: 8px; padding: 14px 20px 0; }
.wizard-chip { padding: 4px 10px; border-radius: 999px; background: #eef2f0; color: #5e6d66; font-size: 12px; border: 1px solid #dfe7e3; }
.wizard-chip.is-active { background: #dcebe5; color: #1d5b4f; border-color: #b6d5c8; font-weight: 600; }
.wizard-chip.is-done { background: #eef7f1; color: #3c7a5b; }
.wizard-body { padding: 14px 20px 4px; }
.wizard-step { display: none; flex-direction: column; gap: 12px; }
.wizard-step.is-active { display: flex; }
.wizard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.wizard-grid label, .wizard-body > label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: #5e6d66; }
.wizard-result { background: #f6f9f8; border: 1px solid #e0e8e5; border-radius: 8px; padding: 12px 14px; }
.wizard-kv { display: flex; justify-content: space-between; gap: 12px; padding: 5px 0; border-bottom: 1px dashed #e0e8e5; font-size: 12.5px; }
.wizard-kv:last-child { border-bottom: none; }
.wizard-hint { margin: 0; font-size: 12px; color: #6d7974; }
.wizard-error { margin: 0; color: #a53434; font-size: 12.5px; }
.wizard-ok { margin: 8px 0 0; color: #1d6b45; font-size: 12.5px; }
.wizard-warn { margin: 8px 0 0; color: #8a5a10; font-size: 12.5px; }
.wizard-run-list { display: flex; flex-direction: column; gap: 6px; max-height: 180px; overflow: auto; padding: 8px 10px; background: #f6f9f8; border: 1px solid #e0e8e5; border-radius: 8px; }


.panel { min-width: 0; }

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: minmax(0, 1fr);
    max-width: 100%;
    overflow-x: hidden;
  }
  .workspace {
    min-width: 0;
    max-width: 100%;
    overflow-x: hidden;
  }
  .nav-list { max-width: 100%; }
  .scene-wrap { max-width: 100%; overflow-x: auto; }
}
@media (max-width: 720px) {
  .dialog-backdrop { padding: 10px; }
  .dialog { width: 100%; max-height: 94vh; }
  .project-head-row { flex-direction: column; }
  .scene-svg { min-width: 560px; }
}

@media print {
  .sidebar,
  .topbar,
  .report-controls,
  .dialog-backdrop,
  .toast-region,
  .nav-list {
    display: none !important;
  }
  .app-shell {
    display: block;
  }
  .workspace {
    padding: 0;
  }
  .report-layout {
    display: block;
  }
  .report-sheet {
    border: none;
    box-shadow: none;
    padding: 0;
  }
}