:root {
  color-scheme: dark;
  --bg: #03050a;
  --surface: #080d16;
  --surface-2: #0d1421;
  --line: #253147;
  --line-soft: #182235;
  --text: #edf4ff;
  --muted: #8290a8;
  --cyan: #2ef2c1;
  --cyan-soft: rgba(46, 242, 193, 0.16);
  --violet: #9b6cff;
  --gold: #ffd06b;
  --magenta: #ee5cff;
  --danger: #ff6487;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 72% 18%, rgba(67, 102, 180, 0.16), transparent 34%),
    radial-gradient(circle at 22% 86%, rgba(46, 242, 193, 0.08), transparent 30%),
    var(--bg);
}

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

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  min-height: 62px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 0 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 9, 16, 0.92);
  backdrop-filter: blur(14px);
}

.brand { display: flex; align-items: center; gap: 11px; font-size: 13px; letter-spacing: 0.16em; font-weight: 600; }
.brand-mark { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold); font-family: Georgia, serif; font-size: 17px; }
.run-state { display: flex; align-items: center; gap: 9px; color: var(--muted); font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.08em; }
.run-state i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.run-state b { color: var(--text); font-weight: 500; }
.boundary { justify-self: end; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.08em; }

.controlbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 22px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.controlbar label, .view-controls label { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 11px; }
select { min-width: 116px; padding: 8px 30px 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface-2); }
.button-group { display: flex; gap: 7px; }
button { padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; background: transparent; cursor: pointer; }
button:hover { border-color: var(--muted); background: rgba(255, 255, 255, 0.035); }
button.primary { min-width: 70px; color: var(--bg); background: var(--text); border-color: var(--text); }
.speed { min-width: 250px; }
.speed input { flex: 1; }
input[type="range"] { accent-color: var(--cyan); }
.mode-note { margin-left: auto; color: var(--muted); font-size: 10px; }

.workspace { flex: 1; display: grid; grid-template-columns: minmax(320px, 0.85fr) minmax(420px, 1.15fr); gap: 1px; background: var(--line); }
.pane { min-width: 0; padding: 18px; background: rgba(3, 5, 10, 0.94); }
.pane-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.eyebrow { display: block; color: var(--cyan); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.14em; text-transform: uppercase; }
h1 { margin: 5px 0 0; font-size: 17px; font-weight: 500; letter-spacing: 0.01em; }
.pane-metric { text-align: right; }
.pane-metric strong { display: block; color: var(--gold); font: 19px ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; }
.pane-metric span { color: var(--muted); font-size: 9px; text-transform: uppercase; letter-spacing: 0.09em; }

.canvas-wrap { position: relative; width: 100%; min-height: 420px; overflow: hidden; border: 1px solid var(--line-soft); border-radius: 9px; background: radial-gradient(circle at 50% 50%, rgba(39, 67, 110, 0.18), transparent 56%), #050811; }
canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.field-wrap canvas, .time-wrap canvas { position: absolute; inset: 0; }
.axis-label { position: absolute; left: 12px; top: 14px; color: var(--muted); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.14em; writing-mode: vertical-rl; }
.field-legend { display: flex; justify-content: center; flex-wrap: wrap; gap: 18px; padding-top: 13px; color: var(--muted); font-size: 10px; }
.field-legend span { display: flex; align-items: center; gap: 6px; }
.field-legend i { width: 9px; height: 9px; border-radius: 2px; }
.field-legend .live { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.field-legend .selected { border: 1px solid var(--gold); }
.field-legend .birth { border: 1px solid var(--magenta); }
.field-legend .death { background: var(--danger); opacity: 0.7; }
.view-controls { display: flex; justify-content: center; gap: 24px; padding-top: 12px; }
.view-controls input { width: 110px; }

.lower-deck { display: grid; grid-template-columns: minmax(280px, 1.3fr) minmax(210px, 0.65fr) minmax(280px, 1fr); gap: 1px; background: var(--line); border-top: 1px solid var(--line); }
.lower-deck article { min-width: 0; padding: 15px 18px; background: var(--surface); }
.slice-heading, .causal-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.slice-heading strong, .causal-heading strong { font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; }
.slice-control { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; margin: 13px 0 8px; color: var(--muted); font: 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.slice-panel code { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 9px; }
.return-panel strong { display: block; margin: 8px 0 5px; color: var(--gold); font: 15px ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; }
.return-panel div { color: var(--muted); font-size: 10px; line-height: 1.4; }
.causal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 11px; background: var(--line); }
.causal-grid div { padding: 7px 8px; background: var(--surface-2); }
.causal-grid span, .causal-grid strong { display: block; }
.causal-grid span { color: var(--muted); font-size: 8px; text-transform: uppercase; letter-spacing: 0.09em; }
.causal-grid strong { margin-top: 3px; font: 12px ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 500; }
.causal-panel p { margin: 9px 0 0; color: var(--muted); font-size: 10px; line-height: 1.35; }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 10px 22px; border-top: 1px solid var(--line); color: var(--muted); font: 9px ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.1em; }

@media (max-width: 900px) {
  .topbar { grid-template-columns: 1fr auto; }
  .boundary { display: none; }
  .controlbar { flex-wrap: wrap; }
  .mode-note { width: 100%; margin-left: 0; }
  .workspace { grid-template-columns: 1fr; }
  .canvas-wrap { min-height: 390px; }
  .lower-deck { grid-template-columns: 1fr 1fr; }
  .causal-panel { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .topbar { grid-template-columns: 1fr; padding: 12px 16px; }
  .run-state { display: none; }
  .controlbar { gap: 12px; padding: 12px 16px; }
  .speed { min-width: 100%; }
  .pane { padding: 14px; }
  .canvas-wrap { min-height: 330px; }
  .lower-deck { grid-template-columns: 1fr; }
  .causal-panel { grid-column: auto; }
  footer { flex-direction: column; padding: 10px 16px; }
}