:root {
  --canvas: #f4f5f1;
  --surface: #fff;
  --ink: #101810;
  --secondary: #4b564b;
  --line: #b7bfb4;
  --border: #647160;
  --orange: #ff6a1a;
  --red: #c91e24;
  --yellow: #ffd600;
  --gray: #e0e4dd;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font:
    16px/1.4 "Helvetica Neue",
    Helvetica,
    Arial,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}
svg {
  display: block;
  flex: none;
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
button,
select {
  font: inherit;
  color: inherit;
}
button,
summary,
select {
  cursor: pointer;
}
button:focus-visible,
select:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 5px;
}
button {
  min-height: 56px;
  border: 2px solid var(--ink);
  border-radius: 3px;
  padding: 10px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
}
button:hover {
  background: #2b382b;
}
button:disabled {
  cursor: default;
  opacity: 0.65;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
h1,
h2,
p {
  margin: 0;
}
.wrap {
  max-width: 1040px;
  margin: auto;
  padding: 0 24px;
}
.masthead {
  background: var(--ink);
  color: white;
}
.masthead-inner {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.concept {
  font-size: 14px;
  color: #d1d8ce;
}
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 0 24px;
}
.device {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 22px;
  font-weight: 600;
}
.device svg {
  width: 28px;
  height: 28px;
}
.head-status {
  color: var(--secondary);
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.head-status svg {
  width: 20px;
  height: 20px;
}
.instrument {
  border: 2px solid var(--ink);
  border-radius: 4px;
  overflow: hidden;
}
.signal {
  --signal-bg: var(--orange);
  --signal-fg: var(--ink);
  padding: 30px 34px;
  background: var(--signal-bg);
  color: var(--signal-fg);
}
.signal[data-tone="critical"] {
  --signal-bg: var(--red);
  --signal-fg: #fff;
}
.signal[data-tone="caution"] {
  --signal-bg: var(--yellow);
}
.signal[data-tone="quiet"] {
  --signal-bg: var(--surface);
}
.signal[data-tone="off"] {
  --signal-bg: var(--gray);
}
.condition {
  display: flex;
  align-items: center;
  gap: 20px;
}
.condition svg {
  width: 68px;
  height: 68px;
  stroke-width: 1.8;
}
.condition h1 {
  font-size: 36px;
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 750;
}
.observation {
  display: grid;
  grid-template-columns: 1fr 210px;
  gap: 24px;
  align-items: center;
  margin-top: 24px;
}
.distance {
  font-size: 136px;
  line-height: 1;
  letter-spacing: -0.065em;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.distance .unit {
  font-size: 36px;
  letter-spacing: -0.03em;
  margin-left: 12px;
  font-weight: 600;
}
.reading-caption {
  display: flex;
  gap: 18px;
  align-items: center;
  margin: 14px 0 0;
  font-size: 16px;
}
.age {
  display: flex;
  align-items: center;
  gap: 7px;
}
.age svg {
  width: 19px;
  height: 19px;
}
.bearing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.compass {
  width: 120px;
  height: 120px;
  position: relative;
  display: grid;
  place-items: center;
}
.compass:before {
  position: absolute;
  inset: 0;
  content: "";
  border: 2px solid currentColor;
  border-radius: 50%;
  opacity: 0.5;
}
.compass .north {
  position: absolute;
  top: -21px;
  font-size: 13px;
  font-weight: 700;
}
.compass svg {
  width: 66px;
  height: 66px;
  stroke-width: 1.8;
  transform: rotate(-67.5deg);
}
.bearing strong {
  font-size: 27px;
  letter-spacing: 0.015em;
}
.position-note {
  margin-top: 28px;
  font-size: 14px;
}
.empty {
  font-size: 88px;
  line-height: 1;
  letter-spacing: -0.05em;
  font-weight: 700;
  min-height: 136px;
  display: flex;
  align-items: center;
}
.empty-label {
  font-size: 17px;
  margin-top: 12px;
}
.instruments {
  display: grid;
  grid-template-columns: 1fr 1fr 1.15fr;
  background: var(--surface);
  border-top: 2px solid var(--ink);
}
.fact {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.fact + .fact {
  border-left: 1px solid var(--line);
}
.fact svg {
  width: 32px;
  height: 32px;
}
.fact strong {
  font-size: 28px;
  line-height: 1.15;
  font-weight: 700;
  display: block;
  font-variant-numeric: tabular-nums;
}
.fact span {
  color: var(--secondary);
  font-size: 14px;
  display: block;
  margin-top: 5px;
}
.fact.delivery strong {
  font-size: 21px;
}
.fact.warn {
  background: var(--yellow);
}
.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 24px 0;
}
.controls p {
  font-size: 15px;
  color: var(--secondary);
}
.instruction {
  padding: 20px 24px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 600;
}
.details-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 30px;
}
details {
  border-top: 1px solid var(--border);
}
summary {
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}
summary:after {
  content: "+";
  margin-left: auto;
  font-size: 25px;
  font-weight: 400;
}
details[open] summary:after {
  content: "−";
}
.detail-body {
  padding: 0 0 24px;
  font-size: 15px;
  color: var(--secondary);
}
.detail-body p + p {
  margin-top: 12px;
}
.detail-body blockquote {
  margin: 0;
  padding: 20px;
  background: var(--ink);
  color: white;
  font:
    14px/1.8 ui-monospace,
    monospace;
}
.detail-body .message-note {
  margin-top: 12px;
}
.preview {
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  padding: 24px 0;
}
.preview label {
  font-size: 15px;
  font-weight: 600;
}
.preview select {
  min-height: 48px;
  max-width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px 34px 8px 12px;
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
  color: var(--secondary);
  padding: 0 0 24px;
}
.legend span {
  display: flex;
  align-items: center;
  gap: 8px;
}
.legend svg {
  width: 22px;
  height: 22px;
}
.legend .close svg {
  fill: var(--orange);
  color: var(--ink);
}
.legend .critical svg {
  fill: var(--red);
  color: white;
  background: var(--red);
  border-radius: 4px;
}
.legend .caution svg {
  background: var(--yellow);
  color: var(--ink);
}
footer {
  padding: 0 0 32px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--secondary);
}
[hidden] {
  display: none !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}
.skip {
  position: absolute;
  top: -60px;
  left: 16px;
  background: white;
  padding: 12px;
  z-index: 5;
}
.skip:focus {
  top: 10px;
}
@media (max-width: 740px) {
  .wrap {
    padding: 0 16px;
  }
  .signal {
    padding: 26px 24px;
  }
  .observation {
    grid-template-columns: 1fr 120px;
    gap: 16px;
  }
  .distance {
    font-size: 112px;
  }
  .condition h1 {
    font-size: 32px;
  }
  .instruments {
    grid-template-columns: 1fr 1fr;
  }
  .fact {
    padding: 20px;
  }
  .fact.delivery {
    grid-column: 1/-1;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .fact.delivery strong {
    font-size: 23px;
  }
  .details-row {
    gap: 20px;
  }
  .compass {
    width: 94px;
    height: 94px;
  }
  .compass svg {
    width: 56px;
    height: 56px;
  }
}
@media (max-width: 480px) {
  .masthead-inner {
    height: 64px;
  }
  .wordmark {
    font-size: 23px;
  }
  .concept {
    font-size: 12px;
  }
  .page-head {
    padding: 24px 0 20px;
    gap: 12px;
  }
  .device {
    font-size: 18px;
    gap: 8px;
  }
  .head-status {
    font-size: 13px;
    gap: 5px;
  }
  .signal {
    padding: 22px 18px;
  }
  .condition {
    gap: 14px;
  }
  .condition svg {
    width: 50px;
    height: 50px;
  }
  .condition h1 {
    font-size: 28px;
  }
  .observation {
    grid-template-columns: minmax(0, 1fr) 76px;
    margin-top: 22px;
    gap: 8px;
  }
  .distance {
    font-size: 80px;
  }
  .distance .unit {
    font-size: 25px;
    margin-left: 6px;
  }
  .reading-caption {
    display: block;
    font-size: 14px;
    margin-top: 12px;
  }
  .age {
    margin-top: 6px;
  }
  .compass {
    width: 66px;
    height: 66px;
  }
  .compass svg {
    width: 42px;
    height: 42px;
  }
  .compass .north {
    top: -18px;
    font-size: 11px;
  }
  .bearing strong {
    font-size: 20px;
  }
  .bearing {
    gap: 8px;
  }
  .position-note {
    font-size: 13px;
    margin-top: 24px;
  }
  .fact {
    padding: 18px 14px;
    gap: 10px;
  }
  .fact svg {
    width: 26px;
    height: 26px;
  }
  .fact strong {
    font-size: 24px;
  }
  .fact span {
    font-size: 13px;
  }
  .empty {
    font-size: 68px;
    min-height: 96px;
  }
  .empty-label {
    font-size: 16px;
  }
  .controls {
    gap: 12px;
    align-items: flex-start;
  }
  .controls button {
    padding: 10px 16px;
    min-width: 110px;
  }
  .controls p {
    font-size: 14px;
    padding-top: 6px;
    max-width: 150px;
  }
  .details-row {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 24px;
  }
  .preview {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
  }
  .preview select {
    width: 100%;
  }
  .legend {
    gap: 14px;
  }
  footer {
    display: block;
  }
  footer a {
    display: inline-block;
    margin-top: 12px;
  }
}
@media (max-width: 350px) {
  .distance {
    font-size: 68px;
  }
  .distance .unit {
    font-size: 22px;
  }
  .signal {
    padding: 20px 14px;
  }
  .condition h1 {
    font-size: 25px;
  }
  .condition svg {
    width: 44px;
    height: 44px;
  }
  .fact {
    gap: 7px;
    padding: 16px 10px;
  }
  .head-status {
    font-size: 12px;
  }
  .device {
    font-size: 16px;
  }
}

.product-name {
  color: #fff;
  text-decoration: none;
  font-size: 20px;
  line-height: 1.05;
  font-weight: 750;
  letter-spacing: -0.025em;
}
.account-nav {
  color: #fff;
  font-weight: 600;
  font-size: 15px;
}
.app-nav {
  display: flex;
  gap: 32px;
  border-bottom: 1px solid var(--line);
}
.app-nav:empty {
  border: 0;
}
.app-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  text-decoration: none;
  color: var(--secondary);
  border-bottom: 3px solid transparent;
  font-weight: 600;
}
.app-nav a[aria-current] {
  color: var(--ink);
  border-color: var(--ink);
}
.app-nav svg {
  width: 22px;
  height: 22px;
}
.app-footer {
  padding-top: 48px;
  padding-bottom: 28px;
  font-size: 13px;
}
.banner {
  margin: 18px 0;
  padding: 16px 20px;
  background: var(--yellow);
  border: 2px solid var(--ink);
  font-size: 16px;
}
.banner.error {
  border-color: var(--red);
}
.loading {
  padding: 48px 0;
}
.auth-panel,
.empty-panel {
  max-width: 510px;
  padding: 64px 0;
  margin: 0 auto 32px;
}
.auth-panel h1 {
  font-size: 44px;
  line-height: 1.06;
  letter-spacing: -0.04em;
}
.auth-panel > p {
  margin: 18px 0 26px;
  color: var(--secondary);
}
.auth-symbol svg {
  width: 64px;
  height: 64px;
  margin-bottom: 24px;
}
.auth-symbol {
  color: var(--ink);
}
.auth-symbol svg {
  fill: var(--orange);
}
form {
  margin-top: 24px;
}
label {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin: 18px 0 8px;
}
input,
select {
  display: block;
  min-height: 50px;
  padding: 11px 13px;
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: #fff;
  color: var(--ink);
  max-width: 100%;
  width: 100%;
}
input:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}
form > button {
  margin-top: 20px;
}
.auth-panel form > button {
  width: 100%;
}
.secondary {
  background: var(--surface);
  color: var(--ink);
}
.secondary:hover {
  background: var(--gray);
}
.local-entry {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.local-entry button {
  width: 100%;
}
.local-entry p,
.hint {
  font-size: 14px;
  color: var(--secondary);
  margin-top: 12px;
  line-height: 1.6;
}
.local-code {
  padding: 14px;
  background: var(--gray);
}
.text-button {
  border: 0;
  background: transparent;
  color: var(--ink);
  padding: 12px 0;
  text-decoration: underline;
  text-underline-offset: 4px;
  justify-content: flex-start;
  font-weight: 500;
}
.text-button:hover {
  background: transparent;
}
.empty-panel {
  text-align: center;
}
.empty-panel svg {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
}
.empty-panel h1 {
  font-size: 32px;
  line-height: 1.15;
}
.empty-panel p {
  margin: 16px 0 28px;
  color: var(--secondary);
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  background: var(--ink);
  color: white;
  text-decoration: none;
  font-weight: 600;
  padding: 12px 20px;
  border: 2px solid var(--ink);
  border-radius: 3px;
}
.button.secondary {
  background: white;
  color: var(--ink);
}
.actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.form-panel {
  max-width: 620px;
  margin: 32px auto 48px;
}
.form-panel.wide {
  max-width: none;
}
.form-panel h1 {
  font-size: 32px;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}
.form-panel h2 {
  font-size: 22px;
  margin: 32px 0 12px;
  line-height: 1.2;
}
.form-panel p {
  margin: 12px 0;
}
.status-line {
  display: flex;
  align-items: center;
  gap: 10px;
}
.inline-fields {
  display: flex;
  align-items: flex-end;
  gap: 16px;
}
.inline-fields label {
  flex: 1;
  min-width: 0;
}
.inline-fields input {
  min-width: 0;
}
.inline-fields button {
  flex: none;
  min-height: 50px;
}
.pair-code {
  padding: 20px;
  background: var(--yellow);
  font:
    700 24px ui-monospace,
    monospace;
  border: 2px solid var(--ink);
  margin: 16px 0;
  overflow-wrap: anywhere;
}
#pairing {
  padding: 20px;
  border: 1px solid var(--border);
  margin: 24px 0;
}
#confirm-pair {
  margin-top: 16px;
}
.simulator,
.simulator-form {
  margin-top: 32px;
}
.simulator .detail-body > button {
  margin-top: 16px;
}
.simulator .detail-body {
  max-width: 650px;
}
.danger-zone {
  margin: 40px 0;
}
.danger-zone p {
  margin: 0 0 20px;
}
.danger {
  background: var(--red);
  border-color: var(--red);
  color: white;
}
.danger:hover {
  background: #a1191e;
}
.page-title {
  font-size: 28px;
}
.ledger {
  margin: 16px 0 30px;
}
.event-row summary {
  display: flex;
  gap: 24px;
  padding: 12px 0;
  min-height: 68px;
}
.event-row time {
  color: var(--secondary);
  font-size: 14px;
  font-weight: 400;
  min-width: 130px;
}
.event-row .detail-body {
  padding-left: 154px;
}
.usage {
  display: flex;
  gap: 56px;
  padding: 20px 0 32px;
}
.usage strong {
  display: block;
  font-size: 40px;
  font-weight: 700;
}
.usage span {
  font-size: 14px;
  color: var(--secondary);
}
.account-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.plan-state {
  text-transform: capitalize;
  font-weight: 700;
  font-size: 28px;
}
.account-grid button {
  margin-top: 18px;
}
.device-picker {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 0;
  font-size: 14px;
}
.device-picker select {
  width: auto;
  max-width: 260px;
}
.command-list strong {
  display: inline-block;
  width: 90px;
  font-family: ui-monospace, monospace;
}
dialog {
  padding: 28px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  max-width: 480px;
  width: calc(100% - 32px);
  color: var(--ink);
  background: var(--surface);
}
dialog::backdrop {
  background: rgb(16 24 16/0.65);
}
dialog form {
  margin: 0;
}
.dialog-head {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.dialog-head h2 {
  font-size: 26px;
  line-height: 1.1;
}
.icon-button {
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  background: transparent;
  color: var(--ink);
  border: 0;
  font-size: 30px;
}
.icon-button:hover {
  background: var(--gray);
}
dialog .actions {
  justify-content: flex-end;
  margin-top: 24px;
}
.form-error {
  color: #a1191e;
  margin-top: 16px;
}
button:disabled {
  opacity: 0.6;
}
blockquote {
  overflow-wrap: anywhere;
}
.bearing-arrow {
  transform: rotate(292.5deg);
}
@media (max-width: 600px) {
  .masthead-inner {
    height: 76px;
  }
  .product-name {
    font-size: 18px;
  }
  .concept {
    font-size: 11px;
    max-width: 140px;
    text-align: right;
    overflow-wrap: anywhere;
  }
  .app-nav {
    gap: 22px;
  }
  .app-nav a {
    font-size: 14px;
    gap: 6px;
  }
  .app-nav svg {
    width: 19px;
    height: 19px;
  }
  .auth-panel {
    padding-top: 36px;
  }
  .auth-panel h1 {
    font-size: 36px;
  }
  .form-panel {
    margin-top: 24px;
  }
  .inline-fields {
    flex-wrap: wrap;
  }
  .inline-fields label {
    flex-basis: 100px;
  }
  .account-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .event-row summary {
    gap: 14px;
  }
  .event-row time {
    min-width: 90px;
    max-width: 90px;
    font-size: 12px;
  }
  .event-row .detail-body {
    padding-left: 0;
  }
  .event-row summary span {
    font-size: 15px;
  }
  .controls .actions {
    justify-content: flex-end;
  }
  .page-head .button {
    font-size: 14px;
    padding: 10px;
  }
  .device-picker select {
    max-width: 180px;
  }
  .device-picker {
    display: block;
  }
  .app-footer {
    padding-top: 32px;
  }
  .form-panel h1 {
    font-size: 28px;
  }
}