:root {
  --n-sens-ink: #13233c;
  --n-sens-muted: #60708b;
  --n-sens-paper: #f5f0e5;
  --n-sens-panel: #fffaf0;
  --n-sens-panel-soft: #e9e2d2;
  --n-sens-source: #f05a47;
  --n-sens-source-soft: #ffd3c9;
  --n-sens-target: #167d88;
  --n-sens-target-soft: #c2ece8;
  --n-sens-gold: #d49a24;
  --n-sens-line: #c4bba9;
  --n-sens-shadow: rgb(30, 39, 53, 0.18);
  --n-sens-glow: rgb(22, 125, 136, 0.22);
  --n-sens-clear: rgb(255, 255, 255, 0);
  --n-sens-white: #fff;
  --n-sens-danger: #a63131;
}

.theme-dark {
  --n-sens-ink: #f3ead8;
  --n-sens-muted: #a8b2c4;
  --n-sens-paper: #101a2a;
  --n-sens-panel: #17243a;
  --n-sens-panel-soft: #22324d;
  --n-sens-source: #ff765f;
  --n-sens-source-soft: #562e31;
  --n-sens-target: #43c0bf;
  --n-sens-target-soft: #173f4a;
  --n-sens-gold: #e7b34e;
  --n-sens-line: #394a65;
  --n-sens-shadow: rgb(0, 0, 0, 0.35);
  --n-sens-glow: rgb(67, 192, 191, 0.2);
  --n-sens-clear: rgb(0, 0, 0, 0);
  --n-sens-white: #fff;
  --n-sens-danger: #ff8e86;
}

.sens-lab {
  --n-orbit-sweep: 150deg;
  --n-mouse-travel: 46%;

  position: relative;
  overflow: hidden;
  padding: clamp(1rem, 2vw, 1.75rem);
  border: 1px solid var(--n-sens-line);
  border-radius: 2rem;
  background:
    radial-gradient(circle at 15% 8%, var(--n-sens-source-soft), var(--n-sens-clear) 28%),
    radial-gradient(circle at 86% 10%, var(--n-sens-target-soft), var(--n-sens-clear) 30%),
    var(--n-sens-paper);
  box-shadow: 0 1.5rem 4rem var(--n-sens-shadow);
  color: var(--n-sens-ink);
}

.sens-lab button,
.sens-lab input {
  font: inherit;
}

.sens-lab button {
  color: var(--n-sens-ink);
}

.sens-lab button:focus-visible,
.sens-lab input:focus-visible {
  outline: 3px solid var(--n-sens-gold);
  outline-offset: 3px;
}

.lab-toolbar {
  position: relative;
  z-index: 8;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.unit-toggle {
  display: inline-flex;
  gap: 0.2rem;
  padding: 0.25rem;
  border: 1px solid var(--n-sens-line);
  border-radius: 99px;
  background: var(--n-sens-panel);
}

.unit-toggle button,
.toolbar-action {
  min-height: 2.5rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 800;
}

.unit-toggle button {
  padding: 0.45rem 0.9rem;
  border-radius: 99px;
  color: var(--n-sens-muted);
}

.unit-toggle button[aria-pressed="true"] {
  background: var(--n-sens-ink);
  color: var(--n-sens-paper);
}

.toolbar-action {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.9rem;
  border-bottom: 1px solid var(--n-sens-line);
}

.action-mark {
  color: var(--n-sens-target);
  font-size: 1.15rem;
}

.quick-guide {
  position: relative;
  z-index: 7;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 1rem 0 0;
  padding: 1px;
  border-radius: 1rem;
  background: var(--n-sens-line);
  list-style: none;
}

.quick-guide li {
  display: grid;
  grid-template-columns: 1.8rem 1fr;
  align-items: start;
  gap: 0.6rem;
  padding: 0.75rem;
  background: var(--n-sens-panel);
  color: var(--n-sens-muted);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.45;
}

.quick-guide b {
  display: grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--n-sens-ink);
  color: var(--n-sens-paper);
}

.orbit-stage {
  position: relative;
  display: grid;
  grid-template-columns: 10rem 1fr 10rem;
  align-items: center;
  min-height: 17rem;
  margin: -1rem 0 -2rem;
}

.portal {
  position: relative;
  z-index: 2;
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  background: conic-gradient(from calc(var(--n-orbit-sweep) * -1), currentcolor, var(--n-sens-clear) var(--n-orbit-sweep));
  box-shadow: 0 0 3rem var(--n-sens-glow);
  transition: transform 500ms ease;
}

.portal::before,
.portal::after {
  position: absolute;
  content: "";
  border-radius: 50%;
}

.portal::before {
  inset: 0.45rem;
  background: var(--n-sens-paper);
  border: 1px solid var(--n-sens-line);
}

.portal::after {
  inset: 1.35rem;
  border: 1px dashed currentcolor;
  opacity: 0.72;
}

.portal-source {
  color: var(--n-sens-source);
  transform: rotate(calc(var(--n-orbit-sweep) * -0.4));
}

.portal-target {
  color: var(--n-sens-target);
  transform: rotate(calc(var(--n-orbit-sweep) * 0.4));
}

.portal-axis,
.portal-core {
  position: absolute;
  z-index: 3;
  display: block;
  background: currentcolor;
}

.axis-horizontal {
  top: calc(50% - 1px);
  left: 1.8rem;
  width: 6.4rem;
  height: 2px;
}

.axis-vertical {
  top: 1.8rem;
  left: calc(50% - 1px);
  width: 2px;
  height: 6.4rem;
}

.portal-core {
  inset: calc(50% - 0.45rem);
  border: 0.25rem solid var(--n-sens-paper);
  border-radius: 50%;
}

.travel-line {
  position: relative;
  height: 2px;
  background: var(--n-sens-line);
}

.travel-line::before,
.travel-line::after {
  position: absolute;
  top: -0.25rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--n-sens-gold);
  content: "";
}

.travel-line::before {
  left: 0;
}

.travel-line::after {
  right: 0;
}

.travel-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--n-mouse-travel);
  background: linear-gradient(90deg, var(--n-sens-source), var(--n-sens-gold));
  transition: width 500ms ease;
}

.mouse-scout {
  position: absolute;
  top: -1.25rem;
  left: var(--n-mouse-travel);
  width: 2rem;
  height: 2.7rem;
  border: 2px solid var(--n-sens-ink);
  border-radius: 1.2rem 1.2rem 0.8rem 0.8rem;
  background: var(--n-sens-panel);
  box-shadow: 0 0.5rem 1rem var(--n-sens-shadow);
  transform: translateX(-50%) rotate(8deg);
  transition: left 500ms ease;
}

.mouse-scout i {
  position: absolute;
  top: 0.35rem;
  left: calc(50% - 1px);
  width: 2px;
  height: 0.65rem;
  background: var(--n-sens-source);
}

.orbit-readout {
  position: absolute;
  z-index: 4;
  top: 2.8rem;
  left: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: min(18rem, 44%);
  padding: 0.75rem;
  text-align: center;
  transform: translateX(-50%);
}

.orbit-readout span,
.orbit-readout small {
  color: var(--n-sens-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.orbit-readout strong {
  min-width: 12ch;
  min-height: 1.35em;
  color: var(--n-sens-ink);
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 1.05;
  white-space: nowrap;
}

.orbit-readout em {
  margin-top: 0.55rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--n-sens-gold);
  border-radius: 99px;
  color: var(--n-sens-ink);
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 800;
}

.calibration-deck {
  position: relative;
  z-index: 6;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10rem minmax(0, 1fr);
  align-items: stretch;
  gap: 1rem;
}

.station {
  min-width: 0;
  padding: clamp(1rem, 2.3vw, 1.6rem);
  border: 1px solid var(--n-sens-line);
  border-radius: 1.35rem;
  background: var(--n-sens-panel);
}

.station-source {
  border-top: 0.3rem solid var(--n-sens-source);
}

.station-target {
  border-top: 0.3rem solid var(--n-sens-target);
}

.station-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
}

.station-heading h3 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.station-index {
  color: var(--n-sens-muted);
  font-size: 0.72rem;
  font-weight: 900;
}

.field-label,
.paired-inputs label > span,
.target-dpi-field > span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--n-sens-muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.custom-select {
  position: relative;
  margin-bottom: 1rem;
}

.select-trigger,
.paired-inputs input,
.target-dpi-field input {
  width: 100%;
  min-height: 3.25rem;
  border: 1px solid var(--n-sens-line);
  border-radius: 0.8rem;
  background: var(--n-sens-paper);
  color: var(--n-sens-ink);
}

.select-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  font-weight: 850;
  text-align: left;
}

.chevron {
  width: 0.55rem;
  height: 0.55rem;
  margin: -0.25rem 0.15rem 0 0.75rem;
  border-right: 2px solid var(--n-sens-target);
  border-bottom: 2px solid var(--n-sens-target);
  transform: rotate(45deg);
  transition: transform 180ms ease;
}

.custom-select[data-open="true"] .chevron {
  margin-top: 0.2rem;
  transform: rotate(225deg);
}

.select-menu {
  position: absolute;
  z-index: 20;
  top: calc(100% + 0.45rem);
  right: 0;
  left: 0;
  display: none;
  max-height: 18rem;
  overflow-y: auto;
  padding: 0.35rem;
  border: 1px solid var(--n-sens-line);
  border-radius: 0.8rem;
  background: var(--n-sens-panel);
  box-shadow: 0 1rem 2rem var(--n-sens-shadow);
}

.custom-select[data-open="true"] .select-menu {
  display: grid;
}

.select-menu button {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem;
  border: 0;
  border-radius: 0.55rem;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.select-menu button:hover,
.select-menu button.is-active {
  background: var(--n-sens-panel-soft);
}

.select-menu small {
  color: var(--n-sens-muted);
}

.paired-inputs {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 0.75rem;
}

.paired-inputs input,
.target-dpi-field input {
  min-width: 0;
  padding: 0.7rem 0.85rem;
  font-size: 1.2rem;
  font-weight: 850;
  line-height: 1.3;
}

.target-dpi-field {
  display: block;
  margin-bottom: 0.85rem;
}

.target-dpi-field input:disabled {
  opacity: 0.58;
}


.input-hint,
.profile-change {
  margin: 0.65rem 0 0;
  color: var(--n-sens-muted);
  font-size: 0.7rem;
  line-height: 1.45;
}

.profile-change {
  padding: 0.55rem 0.7rem;
  border-left: 0.2rem solid var(--n-sens-gold);
  background: var(--n-sens-panel-soft);
  color: var(--n-sens-ink);
}

.profile-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
  color: var(--n-sens-muted);
  font-size: 0.68rem;
  font-weight: 750;
}

.profile-meta b {
  color: var(--n-sens-ink);
}

.transfer-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.swap-button,
.link-button {
  width: 100%;
  border: 1px solid var(--n-sens-line);
  background: var(--n-sens-panel);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 850;
}

.swap-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3.8rem;
  padding: 0.7rem;
  border-radius: 1rem;
  line-height: 1.25;
  text-align: center;
  overflow-wrap: break-word;
}

.swap-button span:first-child {
  color: var(--n-sens-gold);
  font-size: 1.6rem;
}

.link-button {
  padding: 0.7rem;
  border-radius: 0.8rem;
}

.link-node {
  display: block;
  width: 0.55rem;
  height: 0.55rem;
  margin: 0 auto 0.35rem;
  border-radius: 50%;
  background: var(--n-sens-muted);
}

.link-button[aria-pressed="true"] .link-node {
  background: var(--n-sens-target);
  box-shadow: 0 0 0 0.3rem var(--n-sens-target-soft);
}

.result-capsule {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.75rem;
  align-items: end;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--n-sens-target);
  border-radius: 1rem;
  background: var(--n-sens-target-soft);
}

.result-capsule > span {
  grid-column: 1 / -1;
  color: var(--n-sens-muted);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.result-capsule output {
  display: block;
  min-width: 8ch;
  min-height: 1.3em;
  overflow: visible;
  color: var(--n-sens-ink);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  font-weight: 900;
  line-height: 1.15;
  white-space: nowrap;
}

.result-capsule button {
  min-height: 2.5rem;
  padding: 0.55rem 0.7rem;
  border: 0;
  border-radius: 0.65rem;
  background: var(--n-sens-target);
  color: var(--n-sens-white);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 850;
}

.preset-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin: 1rem 0;
  padding: 0.7rem;
  border-top: 1px solid var(--n-sens-line);
  border-bottom: 1px solid var(--n-sens-line);
}

.preset-strip > span {
  margin-right: 0.35rem;
  color: var(--n-sens-muted);
  font-size: 0.7rem;
  font-weight: 850;
  text-transform: uppercase;
}

.preset-strip button {
  min-height: 2.3rem;
  padding: 0.45rem 0.8rem;
  border: 1px solid var(--n-sens-line);
  border-radius: 99px;
  background: var(--n-sens-panel);
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 800;
}

.preset-strip button:hover {
  border-color: var(--n-sens-gold);
}

.instrument-footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
}

.metric-ribbon {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--n-sens-line);
  border-radius: 1rem;
  background: var(--n-sens-line);
}

.metric-ribbon div {
  min-width: 0;
  padding: 0.85rem;
  background: var(--n-sens-panel);
}

.metric-ribbon dt {
  color: var(--n-sens-muted);
  font-size: 0.66rem;
  font-weight: 800;
  text-transform: uppercase;
}

.metric-ribbon dd {
  min-width: 8ch;
  min-height: 1.25em;
  margin: 0.25rem 0 0;
  overflow: visible;
  color: var(--n-sens-ink);
  font-size: 1.05rem;
  font-weight: 850;
  line-height: 1.25;
}

.formula-panel,
.verification-note {
  padding: 1rem;
  border-radius: 1rem;
}

.formula-panel {
  border: 1px dashed var(--n-sens-gold);
}

.formula-panel span,
.verification-note strong {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.formula-panel code {
  color: var(--n-sens-muted);
  font-size: 0.76rem;
  line-height: 1.55;
}

.verification-note {
  background: var(--n-sens-panel-soft);
}

.verification-note p,
.verification-note small {
  color: var(--n-sens-muted);
  line-height: 1.55;
}

.verification-note p {
  margin: 0 0 0.6rem;
  font-size: 0.82rem;
}

.verification-note small {
  display: block;
  font-size: 0.7rem;
}

.invalid-message {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--n-sens-danger);
  font-weight: 800;
  text-align: center;
}

@media (max-width: 900px) {
  .orbit-stage {
    grid-template-columns: 7rem 1fr 7rem;
    min-height: 14rem;
  }

  .portal {
    width: 7rem;
    height: 7rem;
  }

  .axis-horizontal {
    left: 1.2rem;
    width: 4.6rem;
  }

  .axis-vertical {
    top: 1.2rem;
    height: 4.6rem;
  }

  .calibration-deck {
    grid-template-columns: 1fr;
  }

  .transfer-column {
    flex-direction: row;
  }

  .swap-button,
  .link-button {
    width: auto;
    min-width: 9rem;
    min-height: 3.2rem;
    border-radius: 99px;
  }
}

@media (max-width: 620px) {
  .sens-lab {
    border-radius: 1.25rem;
  }

  .lab-toolbar,
  .preset-strip {
    align-items: stretch;
    flex-direction: column;
  }

  .quick-guide {
    grid-template-columns: 1fr;
  }

  .unit-toggle {
    align-self: flex-start;
  }

  .toolbar-action {
    align-self: flex-end;
  }

  .orbit-stage {
    grid-template-columns: 4.6rem 1fr 4.6rem;
    min-height: 12.5rem;
    margin-top: 0;
  }

  .portal {
    width: 4.6rem;
    height: 4.6rem;
  }

  .portal::after,
  .portal-axis {
    display: none;
  }

  .orbit-readout {
    top: 2rem;
    width: 64%;
  }

  .orbit-readout strong {
    font-size: 2rem;
  }

  .paired-inputs,
  .instrument-footer,
  .metric-ribbon {
    grid-template-columns: 1fr 1fr;
  }

  .formula-panel,
  .verification-note {
    grid-column: 1 / -1;
  }

  .preset-strip > span {
    text-align: center;
  }

  .preset-strip button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .portal,
  .travel-progress,
  .mouse-scout {
    transition: none;
  }
}