:root {
  color-scheme: light;
  --paper: #f4ead4;
  --paper-2: #fff9ec;
  --ink: #201b14;
  --muted: #6e6251;
  --line: rgba(32, 27, 20, 0.18);
  --line-strong: rgba(32, 27, 20, 0.34);
  --barn: #a83a2e;
  --barn-dark: #6d241d;
  --copper: #b86f3c;
  --blue: #2166a5;
  --green: #2f7d50;
  --yellow: #d9a936;
  --white-wire: #f6f0df;
  --black-wire: #24211f;
  --orange: #c66a2f;
  --danger: #b9251d;
  --ok: #247044;
  --panel: rgba(255, 250, 235, 0.92);
  --shadow: 0 18px 40px rgba(53, 42, 25, 0.18);
  --radius: 8px;
  --mono: "Courier New", Courier, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  background:
    linear-gradient(rgba(32, 27, 20, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(32, 27, 20, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 18% 16%, rgba(184, 111, 60, 0.12), transparent 24%),
    radial-gradient(circle at 80% 24%, rgba(33, 102, 165, 0.10), transparent 22%),
    var(--paper);
  background-size: 28px 28px, 28px 28px, 100% 100%, 100% 100%, auto;
}

body {
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

a {
  color: var(--barn-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.app {
    min-height: 100vh;
    width: 100%;
    display: grid;
  grid-template-columns: minmax(240px, 0.85fr) minmax(420px, 2fr) minmax(300px, 1.05fr);
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 12px;
  padding: 12px;
}

.topbar {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  align-items: center;
  gap: 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(168, 58, 46, 0.12), transparent 42%),
    var(--panel);
  box-shadow: var(--shadow);
  padding: 13px 16px;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.55rem, 2.1vw, 2.35rem);
  line-height: 1;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand p {
  max-width: 900px;
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.35;
}

.top-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 8px;
}

.panel,
.workbench,
.bottom-strip {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

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

.panel-header {
  border-bottom: 1px solid var(--line);
  padding: 13px 14px 10px;
  background:
    linear-gradient(90deg, rgba(32, 27, 20, 0.06), transparent),
    rgba(255, 255, 255, 0.28);
}

.panel-header h2,
.bottom-section h2 {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-header p,
.bottom-section p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.left-panel,
.right-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.scroll {
  overflow: auto;
  padding: 12px;
}

.step-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.step-link {
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.56);
  color: var(--ink);
  cursor: pointer;
  min-height: 40px;
  padding: 7px 8px;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
}

.step-link[aria-current="step"] {
  background: var(--barn);
  border-color: var(--barn-dark);
  color: var(--paper-2);
}

.lesson-panel,
.harness-map,
.ceiling-wire-panel {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.48);
  padding: 11px;
}

.lesson-panel h3,
.harness-map h3,
.ceiling-wire-panel h3 {
  margin: 4px 0 0;
  font-size: 1rem;
  line-height: 1.2;
}

.lesson-panel p,
.harness-map p,
.ceiling-wire-panel p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.36;
}

.lesson-panel .btn {
  width: 100%;
  margin-top: 10px;
  text-align: center;
}

.progressive-panel[hidden] {
  display: none !important;
}

.ceiling-wire-list {
  display: grid;
  gap: 7px;
  margin-top: 10px;
}

.ceiling-wire-btn {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  cursor: pointer;
  min-height: 46px;
  padding: 8px 10px;
  text-align: left;
}

.ceiling-wire-btn[aria-pressed="true"] {
  background: rgba(168, 58, 46, 0.12);
  border-color: var(--barn);
}

.ceiling-wire-btn strong,
.wire-explain h4 {
  display: block;
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.2;
}

.ceiling-wire-btn span span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.72rem;
}

.wire-explain {
  margin-top: 10px;
  border-left: 4px solid var(--blue);
  background: rgba(255, 249, 236, 0.72);
  padding: 9px 10px;
}

.workbench {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background:
    linear-gradient(120deg, rgba(255, 249, 236, 0.92), rgba(244, 234, 212, 0.82)),
    repeating-linear-gradient(90deg, rgba(109, 36, 29, 0.07) 0, rgba(109, 36, 29, 0.07) 7px, transparent 7px, transparent 21px);
}

.bench-toolbar {
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(160px, auto) 1fr auto auto;
  gap: 10px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 10px;
  background: rgba(255, 249, 236, 0.82);
}

.stage-buttons,
.fan-tabs,
.zoom-controls,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.zoom-controls {
  align-items: center;
  justify-content: end;
}

.icon-btn {
  min-width: 38px;
  text-align: center;
  font-weight: 800;
}

.zoom-readout {
  min-width: 42px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-align: right;
}

.btn,
.icon-btn,
.tab,
.brand-btn,
.learner-mode-btn,
.stage-btn,
.wire-btn,
.target-btn,
.component-btn,
.detail-focus-btn {
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  cursor: pointer;
  min-height: 34px;
  padding: 7px 10px;
  line-height: 1.15;
  text-align: left;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.btn:hover,
.icon-btn:hover,
.tab:hover,
.brand-btn:hover,
.learner-mode-btn:hover,
.stage-btn:hover,
.wire-btn:hover,
.target-btn:hover,
.component-btn:hover,
.detail-focus-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(32, 27, 20, 0.55);
  box-shadow: 0 6px 18px rgba(53, 42, 25, 0.12);
}

.btn:focus-visible,
.icon-btn:focus-visible,
.tab:focus-visible,
.brand-btn:focus-visible,
.learner-mode-btn:focus-visible,
.stage-btn:focus-visible,
.wire-btn:focus-visible,
.target-btn:focus-visible,
.component-btn:focus-visible,
.detail-focus-btn:focus-visible {
  outline: 3px solid rgba(33, 102, 165, 0.38);
  outline-offset: 2px;
}

.tab[aria-selected="true"],
.brand-btn[aria-pressed="true"],
.learner-mode-btn[aria-pressed="true"],
.stage-btn[aria-pressed="true"],
.component-btn[aria-pressed="true"],
.wire-btn[aria-pressed="true"],
.detail-focus-btn[aria-pressed="true"] {
  color: #fff9ec;
  background: var(--barn);
  border-color: var(--barn-dark);
}

.btn.primary {
  background: var(--ink);
  color: var(--paper-2);
  border-color: var(--ink);
}

.btn.danger {
  background: rgba(185, 37, 29, 0.11);
  color: var(--danger);
  border-color: rgba(185, 37, 29, 0.34);
}

.btn.success {
  background: rgba(36, 112, 68, 0.13);
  color: var(--ok);
  border-color: rgba(36, 112, 68, 0.35);
}

.meter-wrap {
  min-width: 210px;
  display: grid;
  gap: 5px;
}

.meter-label {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.meter-track {
  height: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.52);
  overflow: hidden;
  border-radius: 999px;
}

#agencyMeter {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--yellow), var(--green), var(--blue));
  transition: width 260ms ease;
}

#scene {
  position: relative;
  min-height: 430px;
  outline: none;
}

#scene canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

#scene canvas:active {
  cursor: grabbing;
}

.scene-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  max-width: min(460px, calc(100% - 28px));
  border: 1px solid rgba(32, 27, 20, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 249, 236, 0.78);
  backdrop-filter: blur(8px);
  padding: 10px 12px;
}

.scene-badge strong {
  display: block;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.scene-badge span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.3;
}

.bench-footer {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  gap: 10px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 10px;
  background: rgba(255, 249, 236, 0.84);
}

#feedback {
  min-height: 42px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--blue);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.56);
  padding: 9px 11px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.3;
}

#feedback.ok {
  border-left-color: var(--ok);
  color: #174a2d;
}

#feedback.warn {
  border-left-color: var(--yellow);
  color: #604710;
}

#feedback.danger {
  border-left-color: var(--danger);
  color: #681711;
}

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

.check-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  gap: 9px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px;
  background: rgba(255, 255, 255, 0.42);
}

.check-item input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--green);
}

.check-item strong {
  display: block;
  font-size: 0.9rem;
}

.check-item span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.3;
}

.component-list,
.learner-mode-list,
.detail-focus-list,
.wire-bank,
.target-bank {
  display: grid;
  gap: 7px;
}

.component-btn,
.learner-mode-btn,
.detail-focus-btn,
.brand-btn {
  width: 100%;
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: center;
  gap: 8px;
}

.detail-focus-list {
  margin-top: 7px;
}

.learner-mode-panel {
  margin-bottom: 12px;
}

.learner-mode-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 7px;
}

.detail-focus-btn,
.learner-mode-btn,
.brand-btn {
  grid-template-columns: 1fr;
}

.detail-focus-btn strong,
.learner-mode-btn strong,
.brand-btn strong {
  display: block;
  font-size: 0.82rem;
  line-height: 1.2;
}

.detail-focus-btn span,
.learner-mode-btn span,
.brand-btn span {
  display: block;
  margin-top: 3px;
  color: currentColor;
  font-size: 0.7rem;
  line-height: 1.2;
  opacity: 0.78;
}

.component-story,
.history-timeline {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.46);
  padding: 11px;
}

.component-story h3,
.history-timeline h3 {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.18;
}

.story-rows {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.story-rows section {
  border-left: 4px solid var(--blue);
  background: rgba(255, 249, 236, 0.64);
  padding: 8px 9px;
}

.story-rows h4 {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.story-rows p,
.history-timeline p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
}

.history-timeline {
  display: grid;
  gap: 8px;
}

.history-timeline[hidden] {
  display: none !important;
}

.history-timeline article {
  display: grid;
  gap: 3px;
  border-left: 4px solid var(--green);
  background: rgba(255, 249, 236, 0.64);
  padding: 8px 9px;
}

.history-timeline span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.history-timeline strong {
  font-size: 0.84rem;
  line-height: 1.2;
}

.component-glyph {
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--paper-2);
  position: relative;
}

.component-glyph::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: inherit;
  background: currentColor;
  opacity: 0.74;
}

.field-note {
  margin-top: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 7px;
  background: rgba(255, 249, 236, 0.66);
  padding: 11px;
}

.field-note h3 {
  margin: 0;
  font-size: 0.84rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.field-note p,
.field-note li {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.38;
}

.field-note p {
  margin: 7px 0 0;
}

.field-note ul {
  padding-left: 18px;
  margin: 8px 0 0;
}

.fan-tabs {
  margin-bottom: 11px;
}

.brand-panel {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.42);
  padding: 11px;
}

.brand-panel h3 {
  margin: 0;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  margin-top: 10px;
}

.brand-details {
  margin-top: 10px;
  border-left: 4px solid var(--green);
  background: rgba(255, 249, 236, 0.68);
  padding: 9px 10px;
}

.brand-details h4 {
  margin: 0;
  font-size: 0.86rem;
}

.brand-details p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.35;
}

.brand-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.brand-tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
  padding: 5px 7px;
  color: var(--ink);
  font-size: 0.7rem;
}

.brand-details .btn {
  margin-top: 9px;
}

.tab {
  flex: 1 1 128px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
}

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

.wire-btn,
.target-btn {
  width: 100%;
  min-height: 48px;
  display: grid;
    grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 8px;
}

.target-btn {
  grid-template-columns: 1fr;
}

.target-btn.correct {
  border-color: rgba(36, 112, 68, 0.5);
  background: rgba(36, 112, 68, 0.08);
}

.target-btn.wrong {
  border-color: rgba(185, 37, 29, 0.42);
  background: rgba(185, 37, 29, 0.08);
}

.swatch {
  width: 18px;
  height: 18px;
  border: 1px solid rgba(32, 27, 20, 0.38);
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
}

.wire-label {
  min-width: 0;
}

.wire-label strong,
.target-btn strong {
  display: block;
  font-size: 0.84rem;
  line-height: 1.18;
}

.wire-label span,
.target-btn span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.25;
}

.right-actions {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.repair-card {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 11px;
  background: rgba(255, 255, 255, 0.44);
}

.repair-card h3 {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.15;
}

.repair-card p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.35;
}

.bottom-strip {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 1px;
  overflow: hidden;
  background: var(--line-strong);
}

.bottom-section {
  background: var(--panel);
  padding: 13px 14px;
  min-width: 0;
}

.tag-list,
.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 10px;
}

.tag,
.source-list a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  padding: 6px 9px;
  color: var(--ink);
  font-size: 0.77rem;
  line-height: 1.15;
  text-decoration: none;
}

.source-list a:hover {
  border-color: var(--barn);
  color: var(--barn-dark);
}

.status-led {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.status-led::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 0 3px rgba(185, 37, 29, 0.12);
}

.status-led.safe::before {
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(36, 112, 68, 0.12);
}

.small {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.3;
}

.divider {
  height: 1px;
  margin: 12px 0;
  background: var(--line);
}

.range-line {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  min-width: 210px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--barn);
}

@media (max-width: 1180px) {
  .app {
    grid-template-columns: minmax(260px, 0.9fr) minmax(420px, 1.6fr);
  }

  .right-panel {
    grid-column: 1 / -1;
  }

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

  .bottom-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
    .app {
        display: flex;
        flex-direction: column;
        padding: 8px;
    }

    .app > *,
    .topbar,
    .panel,
    .workbench,
    .bottom-strip,
    .check-item,
    .repair-card,
    .brand-panel,
    .brand-btn,
    .learner-mode-btn,
    .component-story,
    .history-timeline,
    .detail-focus-btn,
    .wire-btn,
    .target-btn {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .brand p,
    .panel-header p,
    .check-item span,
    .field-note p,
    .field-note li,
    .repair-card p,
    .bottom-section p,
    .brand-details p,
    .brand-tags span,
    .story-rows p,
    .history-timeline p,
    .wire-label span,
    .target-btn span {
        overflow-wrap: anywhere;
    }

    .topbar,
  .bench-toolbar,
  .bench-footer {
    grid-template-columns: 1fr;
  }

  .top-actions,
  .zoom-controls,
  .button-row {
    justify-content: start;
  }

  .step-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workbench {
    min-height: 620px;
  }

  #scene {
    min-height: 430px;
  }

  .wire-grid,
  .right-actions {
    grid-template-columns: 1fr;
  }

  .brand-list {
    grid-template-columns: 1fr;
  }

  .learner-mode-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}