:root {
  color-scheme: dark;
  --ink: #05080d;
  --panel: #0a1017;
  --panel-2: #0d151e;
  --line: rgba(150, 190, 220, 0.13);
  --line-strong: rgba(150, 190, 220, 0.26);
  --text: #e4eef7;
  --muted: #7a8fa3;
  --accent: #4fd8e8;
  --amber: #ffb056;
  --pos: #ff7a62;
  --neg: #5aa9ff;
  --teal: #5fe3d0;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(1100px 520px at 12% -8%, rgba(45, 140, 190, 0.14), transparent 70%),
    radial-gradient(900px 480px at 96% 108%, rgba(95, 227, 208, 0.07), transparent 70%),
    var(--ink);
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.hidden { display: none !important; }

/* ------------------------------------------------------------- controls */

button, input, select { font: inherit; color: var(--text); }

button {
  background: rgba(12, 22, 32, 0.9);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  transition: background 130ms ease, border-color 130ms ease, color 130ms ease;
}
button:hover { border-color: var(--line-strong); background: rgba(22, 40, 55, 0.95); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.35; cursor: not-allowed; }
button:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
button.primary {
  background: linear-gradient(160deg, rgba(79, 216, 232, 0.22), rgba(46, 140, 175, 0.28));
  border-color: rgba(79, 216, 232, 0.45);
  color: #d8fbff;
  min-width: 84px;
  font-weight: 600;
}
button.primary.running {
  background: linear-gradient(160deg, rgba(255, 176, 86, 0.2), rgba(190, 110, 40, 0.24));
  border-color: rgba(255, 176, 86, 0.45);
  color: #ffe4c2;
}
button.danger { color: #ffc9cf; border-color: rgba(255, 122, 98, 0.3); }
button.icon { padding: 0.34rem 0.55rem; line-height: 1; }
button.icon.wide { min-width: 62px; }
button.tint-pos { border-color: rgba(255, 122, 98, 0.35); }
button.tint-neg { border-color: rgba(90, 169, 255, 0.35); }

select, input[type="number"] {
  width: 100%;
  padding: 0.44rem 0.5rem;
  background: rgba(5, 11, 18, 0.85);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.82rem;
}
input[type="range"] { width: 100%; accent-color: var(--accent); margin: 0.2rem 0 0; }
input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; }

.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.72rem;
  white-space: nowrap;
}

/* --------------------------------------------------------------- header */

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 1.15rem 0.85rem;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
h1 {
  margin: 0;
  font-size: clamp(1.1rem, 1.9vw, 1.6rem);
  font-weight: 620;
  letter-spacing: -0.02em;
}
h1 em { font-style: italic; color: var(--amber); }
.transport { display: flex; align-items: center; gap: 0.42rem; flex-wrap: wrap; }

.banner {
  margin: 0.7rem 1.15rem 0;
  padding: 0.6rem 0.8rem;
  border: 1px solid rgba(255, 176, 86, 0.35);
  border-radius: 9px;
  background: rgba(255, 176, 86, 0.07);
  color: #ffdcb0;
  font-size: 0.84rem;
}

/* ------------------------------------------------------------ workspace */

.workspace {
  display: grid;
  grid-template-columns: minmax(230px, 268px) minmax(520px, 1fr) minmax(240px, 292px);
  gap: 0.8rem;
  align-items: start;
  padding: 0.8rem 1.15rem 1.4rem;
  max-width: 2000px;
  margin: 0 auto;
}

.panel, .stage-card {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: 13px;
  overflow: hidden;
}
.panel {
  position: sticky;
  top: 0.6rem;
  max-height: calc(100vh - 1.2rem);
  overflow-y: auto;
  scrollbar-width: thin;
}
.block { padding: 0.85rem 0.9rem; border-bottom: 1px solid var(--line); }
.block:last-child { border-bottom: none; }
.block h2 {
  margin: 0 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.head-row h2 { margin-bottom: 0; }
.head-actions { display: flex; align-items: center; gap: 0.35rem; }

.field { display: grid; gap: 0.3rem; margin-bottom: 0.6rem; }
.field > span { font-size: 0.75rem; color: var(--muted); }
.slider { display: block; margin-bottom: 0.7rem; }
.slider > span {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.75rem;
  color: var(--muted);
}
.slider em { font-style: normal; color: var(--text); font-size: 0.75rem; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem; margin-top: 0.5rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 0.45rem; }
.check {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.76rem;
  color: var(--muted);
  margin: 0.35rem 0;
  cursor: pointer;
}
.checks { display: flex; flex-wrap: wrap; gap: 0 0.9rem; align-items: center; }

.blurb {
  margin: 0.55rem 0 0;
  font-size: 0.79rem;
  line-height: 1.5;
  color: #a9bece;
  border-left: 2px solid rgba(79, 216, 232, 0.35);
  padding-left: 0.6rem;
}
.note { margin: 0.5rem 0 0; font-size: 0.74rem; line-height: 1.5; color: var(--muted); }
.note strong { color: #c3d6e5; font-weight: 600; }
.empty { font-size: 0.78rem; color: var(--muted); margin: 0.3rem 0; }

/* ---------------------------------------------------------------- stage */

.stage-card { display: flex; flex-direction: column; }
.stage-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.modes { display: flex; gap: 2px; background: rgba(5, 11, 18, 0.7); border: 1px solid var(--line); border-radius: 10px; padding: 2px; }
.modes button {
  border: none;
  background: transparent;
  border-radius: 8px;
  padding: 0.38rem 0.68rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--muted);
}
.modes button:hover { background: rgba(79, 216, 232, 0.08); color: var(--text); }
.modes button.active { background: rgba(79, 216, 232, 0.17); color: #d8fbff; box-shadow: inset 0 0 0 1px rgba(79, 216, 232, 0.3); }
.zoom { display: flex; gap: 0.25rem; }

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 340px;
  background: #04070c;
  overflow: hidden;
  touch-action: none;
}
.stage canvas { position: absolute; inset: 0; display: block; width: 100%; height: 100%; }
#overlay { cursor: crosshair; }

.legend {
  margin: 0;
  padding: 0.5rem 0.75rem;
  font-size: 0.76rem;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 11, 18, 0.4);
}

.stage-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.1rem 1rem;
  padding: 0.7rem 0.75rem 0.3rem;
  border-bottom: 1px solid var(--line);
}
.stage-controls .checks { grid-column: 1 / -1; padding-bottom: 0.4rem; }

.readouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1px;
  background: var(--line);
}
.readouts article { padding: 0.55rem 0.75rem; background: var(--panel); }
.readouts span { display: block; font-size: 0.68rem; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); }
.readouts strong { display: block; margin-top: 0.2rem; font-size: 0.86rem; font-weight: 500; }
.status { margin: 0; padding: 0.5rem 0.75rem; font-size: 0.73rem; color: var(--muted); border-top: 1px solid var(--line); }

.tooltip {
  position: absolute;
  transform: translate(12px, -30px);
  padding: 0.24rem 0.45rem;
  background: rgba(5, 11, 18, 0.94);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.7rem;
  pointer-events: none;
  white-space: nowrap;
}

/* --------------------------------------------------------- inspector */

.badge-row { margin-bottom: 0.5rem; }
.badge { font-size: 1.05rem; font-weight: 600; color: var(--pos); }
.vitals { margin: 0.6rem 0 0; font-size: 0.74rem; }
.vitals > div { display: flex; justify-content: space-between; gap: 0.5rem; padding: 0.24rem 0; border-top: 1px solid var(--line); }
.vitals dt { color: var(--muted); }
.vitals dd { margin: 0; }

.chart {
  display: block;
  width: 100%;
  height: 92px;
  background: rgba(4, 8, 13, 0.75);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.chart-legend { display: flex; gap: 0.85rem; margin-top: 0.45rem; font-size: 0.72rem; color: var(--muted); }
.legend-item { display: inline-flex; align-items: center; gap: 0.32rem; }
.legend-item i { width: 14px; height: 2px; border-radius: 2px; display: inline-block; }

details { margin-top: 0.6rem; }
summary { cursor: pointer; font-size: 0.75rem; color: var(--accent); }
.eq { margin: 0.45rem 0; font-size: 0.8rem; color: #cfe2f0; }
.eq.small { font-size: 0.72rem; color: var(--muted); }

/* ------------------------------------------------------------ responsive */

@media (max-width: 1180px) {
  .workspace { grid-template-columns: 1fr; }
  .panel { position: static; max-height: none; }
}
@media (max-width: 640px) {
  .topbar { padding: 0.8rem; }
  .workspace { padding: 0.6rem; }
  .stage { aspect-ratio: 4 / 3; min-height: 280px; }
  .modes button { padding: 0.34rem 0.5rem; font-size: 0.7rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}


/* ---- radiation flux, probes, scenario parameters ---- */
.param-strip:empty { display: none; }
.param-strip {
  display: flex; flex-direction: column; gap: 10px;
  padding: 10px 0 2px; margin-top: 4px;
  border-top: 1px solid var(--rule);
}
.inline-panel { margin-top: 14px; }
.flux-body { display: flex; gap: 12px; align-items: center; }
.polar {
  width: 108px; height: 108px; flex: none;
  border-radius: 50%;
  background: rgba(8, 16, 26, 0.55);
  border: 1px solid var(--rule);
}
.readout-list { margin: 0; flex: 1; display: flex; flex-direction: column; gap: 5px; }
.readout-list div { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.readout-list dt { font-size: 11px; color: var(--dim); letter-spacing: .02em; }
.readout-list dd { margin: 0; font-size: 12px; color: var(--ink); }
.fineprint { font-size: 11px; color: var(--dim); line-height: 1.45; margin: 8px 0 0; }
.row { display: flex; gap: 8px; }
.row button { flex: 1; }
button.armed { border-color: var(--accent); color: var(--accent); }
.probe-dot { pointer-events: none; }

[hidden] { display: none !important; }
.stage.orbiting { cursor: move; }