:root {
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: #17372e;
  background: #f5f8f6;
  font-size: 14px;
  --green: #167553;
  --line: #d9e5de;
  --muted: #567267;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  overflow: hidden;
}
button,
input,
select {
  font: inherit;
  color: inherit;
}
button,
select,
input:not([type="checkbox"]) {
  border: 1px solid #bdcec4;
  border-radius: 8px;
  background: #fff;
  min-height: 34px;
  padding: 6px 10px;
}
button {
  cursor: pointer;
  touch-action: manipulation;
  font-weight: 600;
  white-space: nowrap;
}
button:hover {
  background: #edf5f0;
  border-color: #76a38e;
}
button:disabled {
  opacity: 0.5;
  cursor: default;
}
button.primary {
  background: var(--green);
  border-color: var(--green);
  color: white;
}
button[aria-pressed="true"] {
  background: #d5ede0;
  border-color: var(--green);
}
button:focus-visible,
input:focus-visible,
select:focus-visible,
canvas:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid #35a978;
  outline-offset: 2px;
}
input[type="checkbox"] {
  accent-color: var(--green);
  width: 16px;
  height: 16px;
  vertical-align: middle;
  margin: 0 5px 0 0;
}
button[hidden],
[hidden] {
  display: none !important;
}
a {
  color: var(--green);
}
#lab {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 0 16px;
  gap: 10px;
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 62px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: #17372e;
  flex-shrink: 0;
}
.brand img {
  width: 120px;
  height: 38px;
  object-fit: contain;
}
.brand span {
  font-weight: 650;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}
.header nav {
  display: flex;
  gap: 6px;
  align-items: center;
}
.header button {
  background: transparent;
  border-color: transparent;
}
#capture-count {
  display: inline-block;
  font-size: 11px;
  background: #e1ece5;
  border-radius: 12px;
  padding: 1px 5px;
}
main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  gap: 10px;
}
.heading {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: space-between;
}
.eyebrow {
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.11em;
  color: var(--green);
  margin: 0 0 3px;
}
h1 {
  font-size: 22px;
  letter-spacing: -0.035em;
  margin: 0;
}
#question {
  font-size: 13px;
  color: var(--muted);
  max-width: 420px;
  margin: 0;
  text-align: right;
}
.transport {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-shrink: 0;
}
.transport #fire {
  min-width: 75px;
}
.rate {
  margin-left: auto;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
#clock {
  min-width: 72px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 650;
}
#mobile-view {
  display: none;
}
.workbench {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 12px;
}
.bench,
.evidence {
  border: 1px solid var(--line);
  background: white;
  border-radius: 14px;
  overflow: hidden;
  min-height: 0;
}
.bench {
  display: flex;
  flex-direction: column;
}
.quick {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}
.quick > span {
  color: var(--muted);
  margin-right: auto;
  font-size: 11px;
}
.quick label {
  white-space: nowrap;
}
.quick input {
  width: 65px;
  min-height: 30px;
  padding: 3px 5px;
  font-variant-numeric: tabular-nums;
}
.canvas-wrap {
  flex: 1;
  min-height: 90px;
  position: relative;
  background: #fcfefc;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
}
#stage {
  touch-action: none;
  cursor: crosshair;
}
#toast {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  pointer-events: none;
  max-width: 540px;
  padding: 9px 12px;
  border-radius: 8px;
  background: #173d30;
  color: white;
  font-size: 12px;
  opacity: 0;
}
#toast.visible {
  opacity: 1;
}
.pair-summary {
  padding: 7px 12px;
  font-size: 12px;
  background: #eaf5ee;
  color: #235e43;
  line-height: 1.4;
}
.overlays {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 6px 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
}
.overlays label {
  white-space: nowrap;
}
.overlays button {
  font-size: 12px;
  min-height: 28px;
  padding: 3px 8px;
}
#pan {
  margin-left: auto;
}
.selection {
  display: flex;
  gap: 6px;
  padding: 5px 12px;
  align-items: center;
}
.selection select {
  min-width: 70px;
  max-width: 240px;
  flex: 1;
}
.selection button {
  font-size: 12px;
}
.instrument-reading {
  padding: 2px 12px 8px;
  color: var(--muted);
  font-size: 11px;
  min-height: 24px;
}
.evidence {
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 10px;
}
.evidence-heading {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  align-items: center;
}
.evidence-heading .eyebrow {
  font-size: 9px;
}
#flight-status {
  background: #eef5ef;
  border-radius: 20px;
  padding: 3px 7px;
  font-size: 10px;
  white-space: nowrap;
}
.flight-label,
.graph-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}
.flight-label select,
.graph-label select {
  min-width: 0;
  flex: 1;
  font-size: 12px;
  min-height: 30px;
}
.readings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px 12px;
}
.readings > div {
  padding: 3px 0;
  border-bottom: 1px solid #eef2ef;
}
.readings small {
  display: block;
  color: var(--muted);
  font-size: 10px;
}
.readings strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.readings strong span {
  font-size: 10px;
  color: var(--muted);
  font-weight: 400;
}
#graph {
  flex: 1;
  min-height: 100px;
  max-height: 330px;
}
.graph-legend {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.4;
  margin: 0;
  max-height: 42px;
  overflow: auto;
}
.equation {
  margin: 0;
  font-size: 11px;
  background: #edf5ef;
  border-radius: 8px;
  padding: 8px;
  line-height: 1.5;
  color: #2e6350;
}
footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: 11px;
  color: var(--muted);
  padding-bottom: 9px;
  flex-shrink: 0;
}
footer span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#environment-label {
  white-space: nowrap;
}
.panel {
  padding: 0;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 16px;
  width: 500px;
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 24px);
  box-shadow: 0 20px 80px #102e2540;
  overflow: hidden;
}
.panel[open] {
  display: flex;
  flex-direction: column;
}
.panel.wide {
  width: 850px;
}
.panel::backdrop {
  background: #173d305c;
  backdrop-filter: blur(3px);
}
.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
  background: white;
}
.panel-heading h2 {
  font-size: 18px;
  margin: 0;
  letter-spacing: -0.02em;
}
.panel-heading button {
  font-size: 22px;
  line-height: 1;
  border: 0;
  min-width: 36px;
}
.panel-content {
  padding: 0 18px 18px;
  overflow: auto;
  overscroll-behavior: contain;
}
.panel p,
.tray p {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}
h3 {
  font-size: 14px;
  margin: 22px 0 12px;
}
.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.fields label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
}
.fields input,
.fields select {
  width: 100%;
  min-width: 0;
}
.fields label.check {
  flex-direction: row;
  align-items: center;
  min-height: 44px;
}
.fields label.check input {
  width: 16px;
}
.actions {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin: 14px 0;
}
.actions input,
.actions select {
  min-width: 0;
  max-width: 100%;
}
.ledge-controls {
  display: flex;
  align-items: end;
  gap: 8px;
  padding-top: 6px;
}
.ledge-controls label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  gap: 5px;
  min-width: 0;
}
.ledge-controls select {
  min-width: 0;
  width: 100%;
}
.panel-message {
  background: #e9f3ed;
  padding: 10px;
  border-radius: 8px;
}
.panel details {
  border-top: 1px solid var(--line);
  padding: 12px 0;
}
.panel summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
}
.panel li {
  font-size: 13px;
  margin: 10px 0;
  line-height: 1.5;
}
#experiment-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}
#experiment-list button {
  text-align: left;
  white-space: normal;
  padding: 12px;
}
#experiment-list strong {
  display: block;
  font-size: 14px;
}
#experiment-list small {
  display: block;
  margin-top: 4px;
  line-height: 1.5;
  color: var(--muted);
  font-weight: 400;
}
#experiment-list button[aria-current="true"] {
  border-color: var(--green);
  background: #eef7f0;
}
.tray {
  position: fixed;
  z-index: 4;
  top: 70px;
  right: 18px;
  width: 350px;
  max-width: calc(100vw - 24px);
  max-height: calc(100dvh - 84px);
  overflow: auto;
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 12px 40px #244b3228;
  padding-bottom: 12px;
}
.tray p {
  margin: 12px 16px;
}
.parts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 0 12px;
}
.parts button {
  text-align: left;
  min-height: 48px;
  white-space: normal;
  touch-action: none;
}
.parts span {
  font-size: 20px;
  display: inline-block;
  width: 26px;
  color: var(--green);
}
#cancel-placement {
  margin: 12px 12px 0;
}
.table-wrap {
  overflow: auto;
  max-height: 280px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 11px;
  white-space: nowrap;
}
th,
td {
  padding: 8px;
  text-align: right;
  border-bottom: 1px solid #e9efea;
}
th {
  position: sticky;
  top: 0;
  background: #edf5ef;
  text-align: right;
  font-weight: 600;
}
th:first-child,
td:first-child {
  text-align: left;
}
.run-row {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
  font-size: 12px;
}
.run-row label {
  flex: 1;
  overflow: hidden;
  overflow-wrap: anywhere;
}
.run-row button {
  font-size: 12px;
}
#analysis-graph {
  height: 230px;
  margin: 16px 0 8px;
}
#fit-result {
  font-size: 12px;
  color: var(--muted);
  display: block;
}
.teacher .heading,
.teacher footer {
  display: none;
}
.teacher .readings strong {
  font-size: 19px;
}
.teacher .workbench {
  grid-template-columns: minmax(0, 1fr) 320px;
}
.teacher .quick {
  font-size: 14px;
}
.teacher .header {
  min-height: 50px;
}
@media (min-width: 1550px) {
  .workbench {
    grid-template-columns: minmax(0, 1fr) 330px;
  }
  .readings strong {
    font-size: 19px;
  }
  .evidence {
    padding: 16px;
  }
}
@media (max-width: 1050px) {
  #lab {
    padding: 0 10px;
    gap: 8px;
  }
  .brand span {
    display: none;
  }
  .header nav {
    gap: 2px;
  }
  .header nav button {
    padding: 6px 8px;
  }
  .quick > span {
    width: 100%;
  }
  .quick {
    gap: 6px 10px;
  }
  .workbench {
    grid-template-columns: minmax(0, 1fr) 255px;
    gap: 8px;
  }
  .overlays {
    gap: 6px;
    padding: 5px 8px;
  }
  .heading h1 {
    font-size: 19px;
  }
  .selection {
    padding: 4px 8px;
  }
  .selection button {
    padding: 5px 7px;
  }
  .evidence {
    gap: 7px;
    padding: 10px;
  }
  .transport {
    gap: 4px;
  }
  .transport button {
    padding: 6px 8px;
  }
  .transport .rate {
    font-size: 0;
  }
  .rate select {
    font-size: 12px;
  }
}
@media (max-width: 760px) {
  .header {
    min-height: 48px;
    flex-wrap: wrap;
    gap: 2px;
    padding: 6px 0;
  }
  .brand img {
    width: 92px;
    height: 28px;
  }
  .header nav {
    margin-left: auto;
  }
  .header nav button {
    font-size: 11px;
    padding: 5px;
    min-height: 32px;
  }
  #fullscreen {
    display: none;
  }
  #capture-count {
    display: none;
  }
  .heading {
    gap: 8px;
  }
  .heading h1 {
    font-size: 17px;
  }
  .heading .eyebrow {
    font-size: 8px;
  }
  #question {
    display: none;
  }
  .transport {
    flex-wrap: wrap;
    gap: 4px;
  }
  .transport button {
    font-size: 12px;
    min-height: 32px;
    padding: 5px 8px;
  }
  .transport #fire {
    min-width: 52px;
  }
  .transport .rate {
    margin-left: auto;
  }
  #clock {
    min-width: 55px;
    font-size: 12px;
  }
  #mobile-view {
    display: block;
  }
  .workbench,
  .teacher .workbench {
    display: flex;
  }
  .bench,
  .evidence {
    width: 100%;
  }
  .evidence {
    display: none;
  }
  #lab.graph-view .bench {
    display: none;
  }
  #lab.graph-view .evidence {
    display: flex;
  }
  .quick > span {
    width: auto;
    margin-right: auto;
  }
  .quick {
    gap: 6px;
    font-size: 11px;
    padding: 6px 8px;
  }
  .quick input {
    width: 55px;
  }
  .quick > span {
    width: 100%;
  }
  .overlays {
    font-size: 11px;
    gap: 7px;
  }
  .selection select {
    max-width: none;
  }
  .selection #teacher {
    font-size: 0;
  }
  .selection #teacher:after {
    content: "Present";
    font-size: 11px;
  }
  .instrument-reading {
    font-size: 10px;
    padding: 3px 8px 6px;
  }
  .evidence {
    padding: 12px;
  }
  .readings {
    grid-template-columns: repeat(3, 1fr);
  }
  .readings strong {
    font-size: 16px;
  }
  #graph {
    max-height: none;
    min-height: 100px;
  }
  .graph-legend {
    max-height: 32px;
  }
  footer {
    font-size: 10px;
    padding-bottom: 6px;
  }
  footer #hint {
    display: none;
  }
  main {
    gap: 6px;
  }
  .pair-summary {
    font-size: 11px;
    padding: 5px 8px;
  }
  .tray {
    top: 60px;
    right: 12px;
  }
  .teacher .readings strong {
    font-size: 17px;
  }
}
@media (max-height: 640px) {
  .header {
    min-height: 44px;
  }
  .brand img {
    height: 28px;
  }
  .heading {
    display: none;
  }
  #lab,
  main {
    gap: 5px;
  }
  .quick > span {
    display: none;
  }
  .quick {
    padding: 4px 8px;
  }
  .evidence {
    gap: 5px;
  }
  .readings {
    grid-template-columns: repeat(3, 1fr);
    gap: 2px 7px;
  }
  .readings strong {
    font-size: 12px;
  }
  .readings small {
    font-size: 9px;
  }
  .readings > div {
    padding: 2px 0;
  }
  .equation {
    display: none;
  }
  .workbench {
    grid-template-columns: minmax(0, 1fr) 290px;
  }
  .selection button,
  .selection select {
    min-height: 28px;
  }
  .instrument-reading {
    padding-bottom: 4px;
    min-height: 18px;
  }
  footer {
    display: none;
  }
  .overlays {
    padding: 4px 8px;
  }
  .panel-heading {
    padding: 8px 14px;
  }
  .graph-legend {
    max-height: 26px;
  }
  .pair-summary {
    padding: 4px 8px;
  }
  .teacher .readings strong {
    font-size: 14px;
  }
}
@media (max-height: 420px) {
  #lab {
    padding: 0 6px;
  }
  .header {
    min-height: 38px;
    padding: 2px 0;
  }
  .heading,
  .quick,
  .instrument-reading {
    display: none;
  }
  .transport button,
  .transport select {
    min-height: 28px;
    padding: 3px 7px;
  }
  .selection {
    padding: 2px 8px;
  }
  .overlays {
    padding: 3px 8px;
  }
  .pair-summary {
    font-size: 10px;
  }
  .readings {
    grid-template-columns: repeat(4, 1fr);
  }
  .readings strong {
    font-size: 12px;
  }
  #graph {
    min-height: 65px;
  }
  .evidence-heading {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition: none;
    animation: none;
  }
}