:root {
  color-scheme: dark;
  --bg: #05070d;
  --panel: rgba(8, 14, 26, 0.82);
  --panel-border: rgba(132, 245, 255, 0.24);
  --text: #ecfbff;
  --muted: #88a8b7;
  --accent: #4dfcff;
  --accent-2: #ff4fd8;
  --danger: #ff5b7a;
  --good: #67ff9a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body,
.app-shell,
#scene {
  height: 100%;
  margin: 0;
}

#scene {
  overflow: hidden;
}

#scene canvas {
  display: block;
}

body {
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 15%, rgba(77, 252, 255, 0.13), transparent 28rem),
    radial-gradient(circle at 78% 24%, rgba(255, 79, 216, 0.12), transparent 25rem),
    var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 27rem);
  width: 100vw;
}

.viewport {
  min-width: 0;
  min-height: 0;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
  max-height: 100vh;
  overflow: auto;
  padding: 1rem;
  border-left: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(10, 18, 32, 0.95), rgba(4, 7, 14, 0.88));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.eyebrow {
  margin: 0 0 0.2rem;
  color: var(--accent);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

h2 {
  font-size: 1rem;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.segmented.compact {
  width: 8rem;
  grid-template-columns: repeat(2, 1fr);
}

.segmented button {
  min-height: 2.35rem;
  border: 0;
  border-right: 1px solid var(--panel-border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.segmented button:last-child {
  border-right: 0;
}

.segmented button[aria-selected="true"] {
  background: linear-gradient(135deg, rgba(77, 252, 255, 0.24), rgba(255, 79, 216, 0.16));
  color: var(--text);
  box-shadow: inset 0 0 24px rgba(77, 252, 255, 0.15);
}

.row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.split {
  justify-content: space-between;
}

.controls,
.toggles,
.readout {
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--panel);
  padding: 0.9rem;
}

.control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(4.8rem, 5.5rem);
  gap: 0.55rem 0.75rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

.control:last-child {
  margin-bottom: 0;
}

.control label {
  color: var(--muted);
}

.control input[type="number"] {
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  padding: 0.35rem 0.45rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.control input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
  accent-color: var(--accent);
}

.toggles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.toggles label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.toggles input {
  accent-color: var(--accent-2);
}

.readout dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.45rem 0.8rem;
  margin: 0.8rem 0 0;
}

.readout dt {
  color: var(--muted);
}

.readout dd {
  min-width: 0;
  margin: 0;
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  overflow-wrap: anywhere;
}

.label {
  padding: 0.16rem 0.38rem;
  border: 1px solid rgba(236, 251, 255, 0.25);
  border-radius: 6px;
  background: rgba(4, 7, 14, 0.72);
  color: var(--text);
  font:
    600 0.76rem/1.1 "IBM Plex Mono",
    ui-monospace,
    monospace;
  text-shadow: 0 0 12px rgba(77, 252, 255, 0.75);
  pointer-events: none;
  white-space: nowrap;
}

.scene-error {
  display: grid;
  min-height: 100%;
  place-items: center;
  padding: 2rem;
  color: var(--danger);
  font:
    600 1rem/1.4 "IBM Plex Mono",
    ui-monospace,
    monospace;
  text-align: center;
}

@media (max-width: 860px) {
  body {
    overflow: auto;
  }

  .app-shell {
    min-height: 100%;
    grid-template-columns: 1fr;
    grid-template-rows: minmax(26rem, 58vh) auto;
  }

  .control-panel {
    max-height: none;
    overflow-x: hidden;
    border-left: 0;
    border-top: 1px solid var(--panel-border);
  }

  .control-panel > * {
    max-width: calc(100vw - 2rem);
  }

  .split {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
  }

  .segmented.compact {
    width: 100%;
  }

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

  .control input[type="number"] {
    width: 100%;
  }

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