:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: #0b1017;
  color: #e7edf5;
}

* {
  box-sizing: border-box;
}

body {
  display: grid;
  min-height: 100vh;
  margin: 0;
  padding: 0.75rem;
  place-items: center;
  background:
    radial-gradient(circle at 50% 15%, #172333 0, transparent 38rem),
    #0b1017;
}

main {
  width: min(100%, 110rem);
  padding: 1rem;
  border: 1px solid #2d3a4d;
  border-radius: 0.75rem;
  background: #131a24;
  box-shadow: 0 1.5rem 5rem #0008;
}

header {
  margin-bottom: 0.75rem;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

.info-button {
  width: 1.7rem;
  min-height: 1.7rem;
  padding: 0;
  border-color: #60728b;
  border-radius: 50%;
  background: #182231;
  color: #b9c8d9;
  font-family: Georgia, serif;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}

.info-button:hover {
  border-color: #55b7ff;
  color: #fff;
}

#info-dialog {
  width: min(32rem, calc(100vw - 2rem));
  padding: 1.2rem;
  border: 1px solid #40516a;
  border-radius: 0.65rem;
  background: #131c28;
  color: #dfe8f3;
  box-shadow: 0 1.5rem 5rem #000c;
}

#info-dialog::backdrop {
  background: #03070dbb;
  backdrop-filter: blur(2px);
}

#info-dialog p {
  margin: 0.8rem 0;
  color: #bcc9d8;
  font-size: 0.9rem;
  line-height: 1.55;
}

#info-dialog strong {
  color: #fff;
}

#info-dialog h3 {
  margin: 1.15rem 0 0;
  color: #79c5ff;
  font-size: 0.9rem;
}

.dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.dialog-heading h2 {
  margin: 0;
  color: #e7edf5;
}

.dialog-close-icon {
  width: 1.8rem;
  min-height: 1.8rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: #a9b7c8;
  font-size: 1.5rem;
  line-height: 1;
}

.dialog-close {
  display: block;
  min-height: 2.25rem;
  margin: 1rem 0 0 auto;
  padding: 0 1.2rem;
}

#status {
  margin: 0.5rem 0 0;
}

h2 {
  margin-top: 0;
  color: #a9b7c8;
  font-size: 0.8rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.workspace {
  display: grid;
  grid-template-columns: 18rem minmax(32rem, 1fr) 18rem;
  gap: 1rem;
  align-items: stretch;
}

section {
  padding: 1.25rem;
  border: 1px solid #283446;
  border-radius: 0.5rem;
  background: #0f151e;
  box-shadow: inset 0 1px #ffffff08;
}

.scene-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 0;
  overflow: hidden;
}

.scene-legend {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid #42516a99;
  border-radius: 0.4rem;
  background: #09101acc;
  color: #c2cedb;
  font-size: 0.72rem;
  pointer-events: none;
}

.scene-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.scene-legend i {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
}

.measurement-dot {
  background: #99b3c7;
}

.contributor-dot {
  background: #ff7614;
}

.source-dot {
  background: #0a7aff;
  box-shadow: 0 0 0.55rem #087cff;
}

.scene-legend .axis-key i {
  width: 0.8rem;
  height: 0.14rem;
  border-radius: 999px;
}

.axis-x {
  background: #f24047;
}

.axis-y {
  background: #4de573;
}

.axis-z {
  background: #4da6ff;
}

.scene-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  color: #8190a4;
  font-size: 0.8rem;
}

.scene-heading h2 {
  margin: 0;
}

.source-presets {
  display: grid;
  flex: 0 1 20.5rem;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.3rem;
}

.source-presets button {
  min-width: 0;
  min-height: 1.75rem;
  margin: 0;
  padding: 0.2rem 0.35rem;
  font-size: 0.68rem;
}

.interaction-help {
  line-height: 1.5;
  text-align: right;
}

canvas {
  flex: 1 1 0;
  display: block;
  width: 100%;
  height: 0;
  min-height: 0;
  background: #070b11;
  cursor: crosshair;
  touch-action: none;
}

.sidebar {
  min-width: 0;
}

.sidebar section {
  padding: 0.9rem;
}

.right-sidebar section {
  padding: 0.75rem;
}

.sidebar section + section {
  margin-top: 1rem;
}

.right-sidebar section + section {
  margin-top: 0.75rem;
}

.position-title {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem;
}

.position-title h2,
.position-title select {
  margin: 0;
}

.position-title h2 {
  font-size: 0.72rem;
  white-space: nowrap;
}

.position-title select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 1.9rem;
  padding: 0 1.1rem 0 0.4rem;
  font-size: 0.68rem;
}

#audio-source-panel {
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

#audio-source-panel.drop-active {
  border-color: #55b7ff;
  box-shadow: inset 0 0 0 1px #55b7ff, 0 0 1rem #168dcc33;
}

label {
  display: flex;
  justify-content: space-between;
  margin-top: 0.75rem;
}

.sidebar label {
  margin-top: 0.55rem;
}

.angle-heading {
  display: grid;
  grid-template-columns: 1fr 5.5rem;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.55rem;
}

.angle-heading label,
.angle-heading input {
  margin: 0;
}

.angle-heading input {
  padding: 0.35rem 0.45rem;
  border: 1px solid #40516a;
  border-radius: 0.35rem;
  background: #182231;
  color: inherit;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

select,
button,
input {
  width: 100%;
  margin-top: 0.55rem;
}

input[type="range"] {
  accent-color: #55b7ff;
}

.checkbox-label {
  justify-content: flex-start;
  gap: 0.55rem;
  color: #c6d1df;
}

.checkbox-label input {
  width: auto;
  margin: 0;
  accent-color: #55b7ff;
}

select,
button {
  min-height: 2.75rem;
  border: 1px solid #40516a;
  border-radius: 0.4rem;
  background: #182231;
  color: inherit;
}

.sidebar select,
.sidebar button {
  min-height: 2.4rem;
}

.sidebar select {
  padding: 0 2rem 0 0.75rem;
}

input[type="file"] {
  padding: 0.45rem;
  border: 1px solid #40516a;
  border-radius: 0.4rem;
  background: #182231;
  color: #c6d1df;
}

input[type="file"]::file-selector-button {
  margin-right: 0.7rem;
  padding: 0.45rem 0.7rem;
  border: 0;
  border-radius: 0.3rem;
  background: #2b79a0;
  color: white;
  cursor: pointer;
}

.file-status,
.privacy-note {
  margin: 0.65rem 0 0;
  color: #9eacbd;
  font-size: 0.78rem;
  line-height: 1.4;
}

.privacy-note {
  color: #6fc9a3;
}

.gain-warning {
  margin: 0.45rem 0 0;
  color: #ffbf69;
  font-size: 0.78rem;
}

.positive-gain {
  color: #ffbf69;
  font-weight: 700;
}

.file-error {
  color: #ff8d8d;
}

button:not(:disabled) {
  cursor: pointer;
}

button:disabled,
select:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid #67cbff;
  outline-offset: 2px;
}

#play {
  border-color: #2089af;
  background: #126181;
  font-weight: 700;
}

#play:not(:disabled):hover {
  background: #17799d;
}

#stop:not(:disabled):hover {
  background: #253249;
}

.transport {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.transport button {
  margin-top: 0;
}

.playback-meter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.65rem;
  color: #9eacbd;
  font-size: 0.72rem;
}

.playback-meter input {
  width: 100%;
  height: 0.55rem;
  margin: 0;
  accent-color: #55b7ff;
}

.playback-meter output {
  min-width: 5.8rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.camera-presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
}

.camera-presets button {
  min-height: 2rem;
  margin: 0;
}

.camera-presets .reset-view {
  grid-column: 1 / -1;
}

.reset-view span {
  margin-right: 0.35rem;
  font-size: 1rem;
}

.hrir-legend {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #aab7c7;
  font-size: 0.72rem;
}

.hrir-panel h2 {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.hrir-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.hrir-legend i {
  display: inline-block;
  width: 0.75rem;
  height: 0.15rem;
  border-radius: 999px;
}

.hrir-legend output {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}

.left-hrir-key {
  background: #52c7ff;
}

.right-hrir-key {
  background: #ff9c52;
}

#hrir-plot {
  display: block;
  width: 100%;
  height: 4.5rem;
  margin-top: 0.65rem;
  border: 1px solid #27364a;
  border-radius: 0.35rem;
  background: #090d13;
}

#hrir-plot path {
  fill: none;
  stroke-linejoin: round;
  stroke-width: 1.35;
  vector-effect: non-scaling-stroke;
}

.plot-zero {
  stroke: #596779;
  stroke-dasharray: 3 4;
  stroke-width: 0.75;
}

.left-hrir-path {
  stroke: #52c7ff;
}

.right-hrir-path {
  stroke: #ff9c52;
}

.hrir-axis {
  display: flex;
  justify-content: space-between;
  margin-top: 0.25rem;
  color: #7f8da0;
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
}

pre {
  min-height: 5rem;
  padding: 0.8rem;
  overflow-x: auto;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  border-radius: 0.35rem;
  background: #090d13;
  color: #a9dcef;
}

#debug {
  height: 6.5rem;
  overflow: auto;
}

footer {
  margin-top: 0.75rem;
  color: #ffd479;
  text-align: center;
}

.error {
  color: #ff8d8d;
}

@media (max-width: 78rem) {
  body {
    padding: 0.75rem;
  }

  main {
    padding: 1rem;
  }

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

  .scene-panel {
    order: -1;
  }

  canvas {
    flex: none;
    height: 55vh;
    min-height: 24rem;
  }

  .scene-legend {
    right: 0.5rem;
    bottom: 0.5rem;
    gap: 0.6rem;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

@media (max-width: 36rem) {
  .scene-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .source-presets {
    flex: none;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .source-presets button {
    min-height: 1.5rem;
  }

  .interaction-help {
    text-align: left;
  }

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

  .scene-legend {
    left: 0.5rem;
  }
}