:root {
  color-scheme: dark;
  --bg: #111216;
  --panel: #191b21;
  --panel-2: #20232b;
  --line: #333842;
  --text: #f3f0e8;
  --muted: #a9adb7;
  --accent: #42c7b8;
  --accent-2: #e4b84b;
  --danger: #ff7b7b;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  overflow: hidden;
}

button,
select,
input {
  font: inherit;
}

.app {
  display: grid;
  grid-template-rows: auto 1fr;
  width: 100vw;
  height: 100vh;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 86px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(25, 27, 33, 0.96);
}

.brand {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-width: 250px;
}

.mark {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background:
    linear-gradient(135deg, #e84c3d 0 18%, transparent 18% 100%),
    linear-gradient(45deg, #42c7b8 0 45%, #e4b84b 45% 70%, #5e8cff 70% 100%);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.35);
}

h1 {
  margin: 0;
  font-size: 18px;
  line-height: 1.1;
  letter-spacing: 0;
}

p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.control {
  display: grid;
  gap: 5px;
  min-width: 190px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  text-transform: uppercase;
}

.control.compact {
  min-width: 116px;
}

select,
.button,
.segmented {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
}

select {
  width: 100%;
  padding: 0 34px 0 12px;
}

input[type="range"] {
  accent-color: var(--accent);
}

.button {
  display: inline-grid;
  place-items: center;
  min-width: 104px;
  padding: 0 14px;
  cursor: pointer;
  user-select: none;
}

.button:hover,
.segmented button:hover,
select:hover {
  border-color: #4b515e;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-width: 170px;
  overflow: hidden;
  padding: 3px;
}

.segmented button {
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.segmented button.active {
  background: var(--accent);
  color: #071210;
}

.viewer-shell {
  position: relative;
  min-height: 0;
  background:
    radial-gradient(circle at 28% 18%, rgba(66, 199, 184, 0.16), transparent 24%),
    radial-gradient(circle at 74% 76%, rgba(228, 184, 75, 0.12), transparent 26%),
    #0d0e12;
}

#gamutCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

#gamutCanvas:active {
  cursor: grabbing;
}

.hud {
  position: absolute;
  top: 18px;
  left: 18px;
  display: grid;
  gap: 14px;
  width: min(340px, calc(100% - 36px));
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(15, 16, 21, 0.72);
  backdrop-filter: blur(14px);
  pointer-events: none;
}

.hud strong,
.hud span {
  display: block;
}

.hud strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
}

.hud span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0;
}

dl div {
  min-width: 0;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.04);
}

dt,
dd {
  margin: 0;
}

dt {
  color: var(--muted);
  font-size: 11px;
}

dd {
  margin-top: 3px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.legend {
  position: absolute;
  right: 18px;
  bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(15, 16, 21, 0.7);
  color: var(--muted);
  font-size: 12px;
  pointer-events: none;
}

.legend span {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 24px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.07);
}

.legend span:nth-child(1) {
  color: #f2f0e7;
}

.legend span:nth-child(2) {
  color: var(--accent);
}

.legend span:nth-child(3) {
  color: var(--accent-2);
}

.axis-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.axis-labels span {
  position: absolute;
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 26px;
  padding: 0 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 7px;
  background: rgba(15, 16, 21, 0.72);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
  transform: translate(-50%, -50%);
  transition: opacity 120ms ease;
}

#labelL {
  color: #f2f0e7;
}

#labelPosA,
#labelNegA {
  color: var(--accent);
}

#labelPosB,
#labelNegB {
  color: var(--accent-2);
}

.status {
  position: absolute;
  left: 50%;
  bottom: 18px;
  max-width: min(560px, calc(100% - 36px));
  transform: translateX(-50%);
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(15, 16, 21, 0.82);
  color: var(--text);
  font-size: 13px;
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.status.show {
  opacity: 1;
}

.status.error {
  border-color: rgba(255, 123, 123, 0.55);
  color: var(--danger);
}

@media (max-width: 760px) {
  body {
    overflow: auto;
  }

  .app {
    min-height: 100vh;
    height: auto;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .controls {
    justify-content: stretch;
  }

  .control,
  .button,
  .segmented {
    flex: 1 1 160px;
  }

  .viewer-shell {
    min-height: 680px;
  }
}