@font-face {
  font-family: 'Space Mono';
  src: url('/static/fonts/SpaceMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: 'Space Mono';
  src: url('/static/fonts/SpaceMono-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
}
@font-face {
  font-family: 'Inter';
  src: url('/static/fonts/Inter-Latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', sans-serif;
  background: #F4F6F8;
  color: #101215;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 10px 16px;
  background: #101215;
  border-bottom: 2px solid #006B5C;
}
.top-bar-brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-width: 0;
}
.page-title {
  font-size: 0.9rem;
  font-weight: bold;
  color: #F4F6F8;
  letter-spacing: 2px;
  text-transform: uppercase;
  white-space: nowrap;
}
.page-subtitle {
  font-size: 0.7rem;
  color: #A7AEB6;
  letter-spacing: 1px;
  white-space: nowrap;
}
.top-bar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.tab-bar {
  display: flex;
  padding: 8px 16px 0;
  background: #E8ECF0;
  border-bottom: 2px solid #A7AEB6;
  overflow-x: auto;
}
.tab {
  background: #E8ECF0;
  border: 1px solid #A7AEB6;
  padding: 5px 14px;
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #A7AEB6;
  cursor: pointer;
  border-radius: 3px 3px 0 0;
  margin-right: 2px;
  white-space: nowrap;
}
.tab.active {
  background: #F4F6F8;
  color: #101215;
  border-top: 2px solid #C1122F;
  border-bottom: none;
  font-weight: bold;
}
.tab:hover:not(.active) {
  color: #101215;
}

main { padding: 16px; }
.tab-section { display: none; }
.tab-section.active { display: block; }

.sim-panel {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.panel {
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  padding: 12px;
}
.panel-label {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #006B5C;
  font-weight: bold;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid #E8ECF0;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #5A6470;
  margin-top: 8px;
  margin-bottom: 3px;
}

.info-tip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 1px solid #A7AEB6;
  color: #A7AEB6;
  font-family: Georgia, 'Times New Roman', serif;
  font-style: italic;
  font-weight: 700;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0;
  text-transform: none;
  cursor: help;
  user-select: none;
  flex-shrink: 0;
  background: transparent;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  box-shadow: none;
}

.info-tip:hover,
.info-tip:focus-visible {
  border-color: #006B5C;
  color: #006B5C;
  outline: none;
}

.tooltip-floater {
  position: fixed;
  width: 260px;
  padding: 10px 12px;
  background: #101215;
  color: #F4F6F8;
  border: 1px solid #006B5C;
  border-radius: 4px;
  font-family: 'Inter', sans-serif;
  font-style: normal;
  font-weight: 400;
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0;
  text-transform: none;
  text-align: left;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 100ms ease;
  z-index: 9999;
  box-shadow: 0 4px 14px rgba(16, 18, 21, 0.25);
  white-space: normal;
}

.tooltip-floater.visible {
  opacity: 1;
  visibility: visible;
}

select {
  width: 100%;
  padding: 6px 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  background: #F4F6F8;
  border: 1px solid #A7AEB6;
  color: #101215;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23A7AEB6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
}
select:focus { border-color: #006B5C; }
select:hover { background-color: #E8ECF0; }

input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 6px 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  background: #F4F6F8;
  border: 1px solid #A7AEB6;
  color: #101215;
  outline: none;
}
input:focus { border-color: #006B5C; }
input[type="text"]:hover,
input[type="number"]:hover { background: #E8ECF0; }
input[type="text"]:disabled,
input[type="number"]:disabled {
  background: #E8ECF0;
  color: #A7AEB6;
  cursor: not-allowed;
}

button {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  border: none;
  padding: 8px 14px;
}

#runLapBtn {
  width: 100%;
  margin: 0 0 8px 0;
  background: #006B5C;
  color: #F4F6F8;
}
#runLapBtn:hover { background: #005548; }


.section-title {
  font-size: 1rem;
  font-weight: bold;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #101215;
  margin-bottom: 8px;
}
.section-sub {
  font-size: 0.8rem;
  color: #A7AEB6;
}

/* Lesson Guide */
.lessons-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 12px;
  height: calc(100vh - 120px);
}
.lessons-sidebar {
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  padding: 12px;
  overflow-y: auto;
}
.lesson-list {
  list-style: none;
  margin-top: 8px;
}
.lesson-item {
  padding: 6px 8px;
  font-size: 0.75rem;
  color: #101215;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.lesson-item:hover { background: #E8ECF0; }
.lesson-item.active {
  border-left: 2px solid #C1122F;
  color: #006B5C;
  font-weight: bold;
}
.lessons-content {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.lesson-body {
  flex: 1;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #101215;
  overflow-y: auto;
}
.lesson-body h1, .lesson-body h2, .lesson-body h3 {
  font-family: 'Space Mono', 'Courier New', monospace;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #101215;
  margin: 1.2em 0 0.4em;
}
.lesson-body h1 { font-size: 0.95rem; border-bottom: 2px solid #006B5C; padding-bottom: 4px; }
.lesson-body h2 { font-size: 0.85rem; border-bottom: 1px solid #E8ECF0; padding-bottom: 3px; }
.lesson-body h3 { font-size: 0.8rem; color: #006B5C; }
.lesson-body p { margin-bottom: 0.8em; }
.lesson-body ul, .lesson-body ol { margin: 0.5em 0 0.8em 1.2em; }
.lesson-body li { margin-bottom: 0.3em; }
.lesson-body code {
  background: #E8ECF0;
  padding: 1px 5px;
  font-size: 0.8rem;
  border: 1px solid #A7AEB6;
}
.lesson-body pre {
  background: #101215;
  color: #A7AEB6;
  padding: 10px;
  overflow-x: auto;
  margin: 0.8em 0;
}
.lesson-body .katex {
  font-size: 1.5rem;
}
.lesson-body .katex-display {
  margin: 1em 0;
  overflow-x: auto;
  font-size: 1.5rem;
}
.lesson-body img {
  max-width: 100%;
  max-height: 55vh;
  width: auto;
  height: auto;
  display: block;
  border: 1px solid #A7AEB6;
  margin: 1em auto;
  background: #F4F6F8;
}
.lesson-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.8rem;
}

/* Lesson link types */
.lesson-body a { text-decoration: none; }

a.code-link {
  color: #006B5C;
  border-bottom: 1px dashed #006B5C;
  font-family: 'Space Mono', 'Courier New', monospace;
  font-size: 0.78rem;
}
a.code-link::after {
  content: ' ↗';
  font-size: 0.65rem;
  opacity: 0.6;
}
a.code-link:hover { background: #E8ECF0; }

a.md-link {
  color: #C1122F;
  border-bottom: 1px solid #C1122F;
}
a.md-link:hover { background: #FFF0F0; }

/* Toast notification */
#lgr-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: #101215;
  color: #F4F6F8;
  padding: 8px 16px;
  font-size: 0.8rem;
  border-left: 3px solid #C1122F;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 9999;
  white-space: nowrap;
  font-family: 'Inter', sans-serif;
}
#lgr-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Ask toggle button */
.ask-btn {
  margin-left: auto;
  align-self: center;
  background: transparent;
  border: 1px solid #A7AEB6;
  border-radius: 3px;
  color: #5A6470;
  padding: 5px 14px;
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.ask-btn:hover { border-color: #F4F6F8; }
.ask-btn.active {
  background: #006B5C;
  color: #F4F6F8;
  border-color: #006B5C;
}

/* Chat panel */
.chat-panel {
  position: fixed;
  right: 0;
  width: 380px;
  background: #FFFFFF;
  border-left: 1px solid #A7AEB6;
  display: flex;
  flex-direction: column;
  z-index: 500;
  transform: translateX(0);
  transition: transform 0.2s ease;
}
.chat-panel.hidden {
  transform: translateX(100%);
}
.chat-panel-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 10px 12px;
  border-bottom: 1px solid #E8ECF0;
  flex-shrink: 0;
}
.chat-panel-header .panel-label {
  margin-bottom: 0;
}
.chat-panel-subtitle {
  font-size: 0.65rem;
  color: #A7AEB6;
  line-height: 1.3;
}
.chat-close-btn {
  background: #C1122F;
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #F4F6F8;
  cursor: pointer;
  padding: 5px 12px;
}
.chat-close-btn:hover { background: #a00e25; }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.chat-msg {
  max-width: 88%;
  font-size: 0.8rem;
  line-height: 1.55;
  padding: 8px 10px;
  border: 1px solid #E8ECF0;
}
.chat-msg.user {
  align-self: flex-end;
  background: #101215;
  color: #F4F6F8;
  border-color: #101215;
}
.chat-msg.assistant {
  align-self: flex-start;
  background: #FFFFFF;
  color: #101215;
}
.chat-msg.assistant p {
  margin: 0 0 0.55rem;
}
.chat-msg.assistant p:last-child {
  margin-bottom: 0;
}
.chat-msg.assistant ul,
.chat-msg.assistant ol {
  margin: 0.45rem 0 0.45rem 1.1rem;
  padding: 0;
}
.chat-msg.assistant li {
  margin: 0.25rem 0;
}
.chat-msg.assistant .katex {
  font-size: 1em;
}
.chat-msg.assistant .katex-display {
  margin: 0.6rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}
.chat-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}
.chat-source-pill {
  font-family: 'Inter', sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.5px;
  color: #A7AEB6;
  background: #E8ECF0;
  border: 1px solid #A7AEB6;
  padding: 2px 7px;
  cursor: pointer;
  text-transform: uppercase;
}
.chat-source-pill:hover {
  background: #006B5C;
  color: #F4F6F8;
  border-color: #006B5C;
}
.chat-input-bar {
  display: flex;
  gap: 6px;
  padding: 10px 12px;
  border-top: 1px solid #E8ECF0;
  flex-shrink: 0;
}
.chat-input-bar input[type="text"] {
  flex: 1;
}
#chatSubmit {
  background: #006B5C;
  color: #F4F6F8;
  padding: 6px 12px;
  font-size: 0.7rem;
  letter-spacing: 1px;
}
#chatSubmit:disabled {
  background: #E8ECF0;
  color: #A7AEB6;
  cursor: not-allowed;
}

.chat-loading {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 14px 10px;
}
.chat-loading span {
  display: block;
  width: 3px;
  height: 12px;
  background: #A7AEB6;
  border-radius: 2px;
  transform-origin: bottom;
  animation: chat-bar 0.8s ease-in-out infinite;
}
.chat-loading span:nth-child(2) { animation-delay: 0.15s; }
.chat-loading span:nth-child(3) { animation-delay: 0.30s; }
@keyframes chat-bar {
  0%, 100% { transform: scaleY(0.3); }
  50%       { transform: scaleY(1); }
}

/* Inner tab strip (Parameters / Config) */
.inner-tab-bar {
  display: flex;
  margin: 8px -12px 10px -12px;
  background: #E8ECF0;
  border-bottom: 1px solid #A7AEB6;
}
.inner-tab {
  background: #E8ECF0;
  border: none;
  border-right: 1px solid #A7AEB6;
  padding: 5px 12px;
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #A7AEB6;
  cursor: pointer;
}
.inner-tab.active {
  background: #FFFFFF;
  color: #101215;
  border-top: 2px solid #C1122F;
  font-weight: bold;
}
.inner-tab:hover:not(.active) { color: #101215; }

.inner-tab-section { display: none; }
.inner-tab-section.active { display: block; }

/* Section headers within a parameter group */
.field-section-header {
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #006B5C;
  font-weight: bold;
  margin-top: 12px;
  margin-bottom: 4px;
  padding-bottom: 3px;
  border-bottom: 1px solid #E8ECF0;
}
.field-section-header:first-child { margin-top: 0; }

/* Subtext hints below inputs */
.field-hint {
  font-size: 0.75rem;
  color: #5A6470;
  margin-top: 2px;
  margin-bottom: 4px;
  letter-spacing: 0.3px;
}

/* Inline error highlight */
input.field-error {
  border-color: #C1122F;
  background: #FFF5F5;
}

/* Checkbox row */
.field-checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  margin-bottom: 4px;
}
.field-checkbox-row input[type="checkbox"] {
  width: auto;
  accent-color: #006B5C;
}
.field-checkbox-row label {
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #5A6470;
}

/* Scrollable inputs panel */
.inputs-panel {
  overflow-y: auto;
  max-height: calc(100vh - 160px);
}

/* ── Viz Panel ──────────────────────────────────────────────────────────────── */

.viz-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: calc(100vh - 160px);
  min-height: 0;
}

.summary-strip {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 8px 12px;
  background: #101215;
  border: 1px solid #A7AEB6;
  flex-shrink: 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.6rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #A7AEB6;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: bold;
  color: #F4F6F8;
  font-family: 'Space Mono', 'Courier New', monospace;
}

.stat-value--sm {
  font-size: 0.8rem;
}

.stat-unit {
  font-size: 0.6rem;
  color: #A7AEB6;
}

.stat-divider {
  width: 1px;
  height: 28px;
  background: #2a3540;
  flex-shrink: 0;
}

.run-status {
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid #2a3540;
  color: #A7AEB6;
  font-family: 'Inter', sans-serif;
}

.run-status.ok {
  border-color: #006B5C;
  color: #006B5C;
}

.run-status.error {
  border-color: #C1122F;
  color: #C1122F;
}

.run-error {
  font-size: 0.75rem;
  color: #C1122F;
  padding: 4px 8px;
  background: #FFF5F5;
  border: 1px solid #C1122F;
  flex-shrink: 0;
  white-space: pre-wrap;
}

.csv-btn {
  margin-left: auto;
  background: transparent;
  border: 1px solid #A7AEB6;
  color: #A7AEB6;
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 10px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  flex-shrink: 0;
}

.csv-btn:hover:not(:disabled) {
  border-color: #006B5C;
  color: #006B5C;
}

.csv-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.chart-workspace {
  flex: 1;
  display: flex;
  gap: 8px;
  min-height: 0;
}

.channel-list {
  width: 120px;
  flex-shrink: 0;
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.channel-list-header {
  padding: 6px 8px;
  border-bottom: 1px solid #E8ECF0;
  font-size: 0.6rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #006B5C;
  font-weight: bold;
  flex-shrink: 0;
}

.channel-group-header {
  padding: 4px 8px 2px;
  font-size: 0.55rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #A7AEB6;
  background: #F4F6F8;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  cursor: pointer;
  border-bottom: 1px solid #F4F6F8;
}

.channel-item:hover { background: #E8ECF0; }

.channel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.channel-item-name {
  font-size: 0.65rem;
  letter-spacing: 0.5px;
  color: #101215;
  display: block;
}

.channel-item-unit {
  font-size: 0.55rem;
  color: #A7AEB6;
  display: block;
}

.channel-item.inactive .channel-item-name { color: #5A6470; }
.channel-item.inactive .channel-dot { opacity: 0.25; }

.chart-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.viz-tab-bar {
  display: flex;
  background: #E8ECF0;
  border: 1px solid #A7AEB6;
  border-bottom: none;
  flex-shrink: 0;
}

.viz-tab {
  background: #E8ECF0;
  border: none;
  border-right: 1px solid #A7AEB6;
  padding: 5px 12px;
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #A7AEB6;
  cursor: pointer;
}

.viz-tab.active {
  background: #FFFFFF;
  color: #101215;
  border-top: 2px solid #C1122F;
  font-weight: bold;
}

.viz-tab:hover:not(.active) { color: #101215; }

.viz-chart-area {
  flex: 1;
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  display: flex;
  flex-direction: column;
  padding: 4px;
  gap: 4px;
  min-height: 0;
}

.chart-pane {
  display: flex;
  flex-direction: column;
  border: 1px solid #E8ECF0;
  min-height: 80px;
}

.chart-pane--lg { flex: 2; min-height: 160px; }
.chart-pane--sm { flex: 1; min-height: 100px; }

.chart-pane-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 8px;
  background: #F4F6F8;
  border-bottom: 1px solid #E8ECF0;
  flex-shrink: 0;
}

.chart-pane-title {
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: bold;
}

.chart-pane-unit {
  font-size: 0.6rem;
  color: #A7AEB6;
}

.chart-pane-body {
  flex: 1;
  position: relative;
  min-height: 0;
}

.chart-pane-body canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

.gg-chart-container {
  flex: 1;
  position: relative;
  min-height: 200px;
}

.gg-chart-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

.track-map-container {
  flex: 1;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.track-map-square {
  position: relative;
}

.track-map-square canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

.gg-v-scale {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  background: #F4F6F8;
  border: 1px solid #E8ECF0;
  flex-shrink: 0;
}

.gg-v-scale-label {
  font-size: 0.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #A7AEB6;
}

.gg-v-scale-min,
.gg-v-scale-max {
  font-size: 0.65rem;
  color: #101215;
  font-variant-numeric: tabular-nums;
}

.gg-v-scale-bar {
  flex: 1;
  height: 8px;
  border-radius: 2px;
}

/* Sim loading animation */
.sim-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
}

.sim-error-tile {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #FFFFFF;
  border: 1px solid #C1122F;
  padding: 24px;
  text-align: center;
}
.sim-error-tile-title {
  font-family: 'Space Mono', 'Courier New', monospace;
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #C1122F;
}
.sim-error-tile-msg {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: #101215;
  max-width: 520px;
  white-space: pre-wrap;
  word-break: break-word;
}
.sim-error-tile-hint {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #A7AEB6;
  margin-top: 6px;
}
.sim-loading-label {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #A7AEB6;
}
.sim-loading-bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 48px;
}
.sim-loading-bars span {
  display: block;
  width: 6px;
  border-radius: 2px 2px 0 0;
  animation: sim-bar 1.1s ease-in-out infinite;
}
.sim-loading-bars span:nth-child(1) { background: #4e9af1; animation-delay: 0s;    height: 30%; }
.sim-loading-bars span:nth-child(2) { background: #4e9af1; animation-delay: 0.1s;  height: 60%; }
.sim-loading-bars span:nth-child(3) { background: #4e9af1; animation-delay: 0.2s;  height: 90%; }
.sim-loading-bars span:nth-child(4) { background: #f1a24e; animation-delay: 0.3s;  height: 50%; }
.sim-loading-bars span:nth-child(5) { background: #f1a24e; animation-delay: 0.4s;  height: 80%; }
.sim-loading-bars span:nth-child(6) { background: #e05d5d; animation-delay: 0.5s;  height: 40%; }
.sim-loading-bars span:nth-child(7) { background: #e05d5d; animation-delay: 0.6s;  height: 70%; }
.sim-loading-bars span:nth-child(8) { background: #4e9af1; animation-delay: 0.7s;  height: 55%; }
.sim-loading-bars span:nth-child(9) { background: #4e9af1; animation-delay: 0.8s;  height: 35%; }
.sim-loading-bars span:nth-child(10){ background: #f1a24e; animation-delay: 0.9s;  height: 65%; }
@keyframes sim-bar {
  0%, 100% { transform: scaleY(0.2); opacity: 0.4; }
  50%       { transform: scaleY(1);   opacity: 1;   }
}

/* Sweep tab */
#runSweepBtn {
  width: 100%;
  margin: 0 0 8px 0;
  background: #006B5C;
  color: #F4F6F8;
}
#runSweepBtn:hover { background: #005548; }

.sweep-chart-container {
  flex: 1;
  position: relative;
  min-height: 300px;
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
}

.sweep-chart-container canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

.sweep-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: #A7AEB6;
  letter-spacing: 1px;
}

.sweep-chart-container .sim-loading {
  border: none;
  background: transparent;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

/* Cross-reference note */
.field-cross-ref {
  font-size: 0.65rem;
  color: #006B5C;
  margin-bottom: 6px;
  line-height: 1.4;
}

/* Tyre file display (read-only) */
.tyre-file-display {
  font-size: 0.72rem;
  color: #101215;
  background: #E8ECF0;
  border: 1px solid #A7AEB6;
  padding: 5px 8px;
  word-break: break-all;
  margin-bottom: 4px;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.slider-row input[type="range"] {
  flex: 1;
  accent-color: #006B5C;
  cursor: pointer;
}
.slider-value {
  font-family: 'Space Mono', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: #006B5C;
  min-width: 36px;
  text-align: right;
}

/* Tyre tab layout */
#runTyreBtn {
  width: 100%;
  margin: 0 0 8px 0;
  background: #006B5C;
  color: #F4F6F8;
}
#runTyreBtn:hover { background: #005548; }

.tyre-viz-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
}

.tyre-charts-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  overflow-y: auto;
  padding-bottom: 8px;
}

.tyre-chart-section {
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  flex-shrink: 0;
}

.tyre-chart-title {
  font-size: 0.65rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #101215;
  padding: 5px 10px;
  background: #E8ECF0;
  border-bottom: 1px solid #A7AEB6;
}

.tyre-chart-wrap {
  height: 280px;
  position: relative;
}

.tyre-chart-wrap canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
}

.tyre-table-section {
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
  flex-shrink: 0;
}

.tyre-error-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
}

.tyre-error-table th {
  background: #E8ECF0;
  padding: 5px 8px;
  text-align: left;
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #101215;
  border-bottom: 1px solid #A7AEB6;
}

.tyre-error-table td {
  padding: 4px 8px;
  border-bottom: 1px solid #E8ECF0;
  color: #101215;
}

.tyre-error-table tr:last-child td { border-bottom: none; }

.tyre-stat-pass { color: #006B5C; font-weight: 700; }
.tyre-stat-fail { color: #C1122F; font-weight: 700; }
.tyre-mu-note {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  color: #A7AEB6;
  margin-left: auto;
  padding: 2px 6px;
  background: #E8ECF0;
  border: 1px solid #A7AEB6;
}

.tyre-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  font-size: 0.75rem;
  color: #A7AEB6;
  letter-spacing: 1px;
  background: #FFFFFF;
  border: 1px solid #A7AEB6;
}

.user-bar-email {
  font-family: ui-monospace, monospace;
  font-size: 0.75rem;
  color: #A7AEB6;
}
.user-bar-logout {
  background: transparent;
  border: 1px solid #A7AEB6;
  padding: 4px 10px;
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  color: #F4F6F8;
  font-family: 'Inter', sans-serif;
}
.user-bar-logout:hover {
  border-color: #F4F6F8;
}
.user-bar-signin {
  display: inline-block;
  background: #006B5C;
  border: 1px solid #006B5C;
  padding: 4px 10px;
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  color: #F4F6F8;
  text-decoration: none;
  font-family: 'Inter', sans-serif;
}
.user-bar-signin:hover {
  background: #00564A;
  border-color: #00564A;
}

/* ── Mobile and tablet responsive overrides ──────────────────────────────── */
/* Breakpoint: tablet portrait and phone (up to 900px wide)                  */
/* These rules are purely additive — desktop rules above are unchanged.       */

@media (max-width: 900px) {

  /* Tab bar — larger tap targets and iOS momentum scroll */
  .tab-bar {
    -webkit-overflow-scrolling: touch;
    padding: 6px 8px 0;
  }
  .tab {
    padding: 10px 12px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }
  .ask-btn {
    padding: 10px 12px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

  /* Top bar — allow wrapping so brand and user section stack if needed */
  .top-bar {
    flex-wrap: wrap;
    gap: 8px;
  }

  /* Main sim panel — single column stack */
  .sim-panel {
    grid-template-columns: 1fr;
  }

  /* Inputs panel — let the page scroll instead of a nested scroll area */
  .inputs-panel {
    max-height: none;
    overflow-y: visible;
  }

  /* Viz panel and tyre viz panel — auto height instead of fixed viewport calc */
  .viz-panel {
    height: auto;
    min-height: 500px;
  }
  .tyre-viz-panel {
    height: auto;
    min-height: 400px;
  }

  /* Summary strip — allow wrapping, hide dividers, push actions to their own row */
  .summary-strip {
    flex-wrap: wrap;
    gap: 8px 16px;
    align-items: flex-start;
  }
  .stat-divider {
    display: none;
  }
  /* Status badge and CSV button each take their own row below the stats */
  .run-status {
    flex-basis: 100%;
    order: 10;
  }
  .csv-btn {
    flex-basis: 100%;
    order: 11;
    margin-left: 0;
    text-align: center;
  }

  /* Chart workspace — stack channel list above chart area */
  .chart-workspace {
    flex-direction: column;
  }
  .channel-list {
    width: 100%;
    max-height: 160px;
    overflow-y: auto;
    overflow-x: hidden;
  }
  .channel-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
  }
  .chart-area {
    min-height: 320px;
  }

  /* Chart panes — ensure visible height in column layout */
  .chart-pane--lg { min-height: 200px; }
  .chart-pane--sm { min-height: 140px; }

  /* Sweep chart — sensible min height on mobile */
  .sweep-chart-container {
    min-height: 260px;
  }

  /* Lessons layout — single column, auto height */
  .lessons-layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  .lessons-sidebar {
    max-height: 220px;
    overflow-y: auto;
  }
  .lessons-content {
    min-height: 400px;
  }

  /* Chat panel — full width at bottom on mobile */
  .chat-panel {
    width: 100%;
    left: 0;
    right: 0;
    border-left: none;
    border-top: 1px solid #A7AEB6;
  }

  /* Tooltip — constrain width so it fits narrow viewports */
  .tooltip-floater {
    max-width: calc(100vw - 32px);
    width: 260px;
  }

  /* Primary action buttons — minimum touch target height */
  #runLapBtn,
  #runSweepBtn,
  #runTyreBtn {
    min-height: 44px;
    font-size: 0.8rem;
  }

  /* CSV download button — larger touch target */
  .csv-btn {
    min-height: 36px;
    padding: 6px 12px;
  }

}

/* ── Phone-specific tweaks (max 480px) ──────────────────────────────────── */

@media (max-width: 480px) {

  /* Hide subtitle and user email on very narrow screens */
  .page-subtitle {
    display: none;
  }
  .user-bar-email {
    display: none;
  }

  /* Reduce main padding to reclaim horizontal space */
  main {
    padding: 10px 8px;
  }

  /* Reduce top-bar padding */
  .top-bar {
    padding: 8px 10px;
  }

  /* Slightly smaller page title tracking so it fits on one line */
  .page-title {
    letter-spacing: 1px;
    font-size: 0.8rem;
  }

  /* Tabs — slightly smaller to fit more on screen without scrolling */
  .tab {
    padding: 10px 8px;
    font-size: 0.65rem;
  }

  /* Panel padding — tighter on phones */
  .panel {
    padding: 10px 8px;
  }

  /* Inner tab bar margin compensates for reduced panel padding */
  .inner-tab-bar {
    margin: 8px -8px 10px -8px;
  }

  /* Stat values — slightly smaller on phones so summary strip fits */
  .stat-value {
    font-size: 0.95rem;
  }

  /* Tyre charts — reduce height slightly on phones */
  .tyre-chart-wrap {
    height: 220px;
  }

  /* Summary strip stat items — compact on very small screens */
  .stat-item {
    min-width: 50px;
  }

  /* CSV button — full width on phone so it is easy to tap */
  .csv-btn {
    width: 100%;
  }

}