:root {
  color-scheme: dark;
  --bg: #101315;
  --panel: #181d20;
  --panel-strong: #20272b;
  --ink: #edf0ea;
  --muted: #a4aca8;
  --line: #30393e;
  --accent: #d28a52;
  --blue: #6daab8;
  --green: #8fb56a;
  --red: #c86958;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: 36px 36px;
  color: var(--ink);
  margin: 0;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  min-height: 100vh;
}

.stage-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  padding: 28px;
}

.stage-copy {
  max-width: 980px;
  padding-bottom: 18px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 4.8rem);
  line-height: 0.98;
  margin-bottom: 14px;
}

h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.35rem;
  line-height: 1.1;
  margin-bottom: 14px;
}

p {
  color: var(--muted);
  line-height: 1.6;
}

code {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  padding: 0.07rem 0.24rem;
}

.scene-host {
  background: #07090a;
  border: 1px solid var(--line);
  min-height: 560px;
  overflow: hidden;
  position: relative;
}

.scene-host canvas {
  display: block;
  height: 100%;
  width: 100%;
}

.control-panel {
  background: rgba(24, 29, 32, 0.96);
  border-left: 1px solid var(--line);
  max-height: 100vh;
  overflow: auto;
  padding: 22px;
}

.panel-section {
  border-bottom: 1px solid var(--line);
  padding: 0 0 22px;
  margin-bottom: 22px;
}

.panel-section:last-child {
  border-bottom: 0;
}

.square-table {
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 12px;
}

.square-cell {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  min-height: 58px;
  padding: 8px;
}

.square-cell strong,
.square-cell span {
  display: block;
}

.square-cell strong {
  color: var(--ink);
  font-size: 1.1rem;
}

.square-cell span {
  color: var(--muted);
  font-size: 0.76rem;
  margin-top: 3px;
}

.square-cell.positive {
  border-color: rgba(109, 170, 184, 0.55);
}

.square-cell.negative {
  border-color: rgba(200, 105, 88, 0.55);
}

.controls {
  display: grid;
  gap: 12px;
}

label {
  color: var(--muted);
  display: grid;
  font-size: 0.78rem;
  font-weight: 760;
  gap: 7px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

input[type="range"] {
  accent-color: var(--accent);
  width: 100%;
}

.button-row {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr 1fr 1fr;
  margin-top: 6px;
}

button {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  padding: 10px;
}

button:hover {
  border-color: var(--accent);
}

.stats {
  display: grid;
  gap: 10px;
}

.stat {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  padding: 12px;
}

.stat span {
  color: var(--muted);
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.stat strong {
  color: var(--ink);
  font-size: 1.05rem;
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

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