:root {
  color-scheme: dark;
  --bg: #101215;
  --panel: #191d22;
  --panel-2: #20262d;
  --line: #333b44;
  --text: #f4f0e8;
  --muted: #a9b0b8;
  --accent: #f5c15a;
  --cyan: #79d3dd;
  --green: #8dd18d;
  --shadow: rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 15%, rgba(121, 211, 221, 0.08), transparent 30%),
    linear-gradient(145deg, #0d0f12 0%, var(--bg) 48%, #15110d 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding: 24px;
}

.stage {
  width: min(1380px, 100%);
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

h1 {
  margin: 0 0 6px;
  font-size: clamp(1.5rem, 2.5vw, 2.5rem);
  letter-spacing: 0;
}

p {
  margin: 0;
  color: var(--muted);
}

.phase-badge {
  min-width: 168px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(25, 29, 34, 0.82);
  box-shadow: 0 14px 40px var(--shadow);
}

.phase-badge span,
.readout span,
.control span,
.moon-caption span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.phase-badge strong {
  display: block;
  margin-top: 4px;
  font-size: 1.1rem;
}

.sim-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  align-items: stretch;
}

.orbit-panel,
.control-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(25, 29, 34, 0.78);
  box-shadow: 0 18px 50px var(--shadow);
}

.orbit-panel {
  min-height: 560px;
  overflow: hidden;
}

canvas {
  display: block;
}

#orbitCanvas {
  width: 100%;
  height: 100%;
  min-height: 560px;
  touch-action: none;
}

#orbitCanvas.can-drag {
  cursor: grab;
}

#orbitCanvas.dragging {
  cursor: grabbing;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
}

.readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.readout div {
  min-width: 0;
  padding: 10px;
  border-radius: 8px;
  background: var(--panel-2);
}

.readout strong {
  display: block;
  margin-top: 3px;
  white-space: nowrap;
}

.moon-view {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border-radius: 8px;
  background: #111418;
  border: 1px solid var(--line);
}

#moonCanvas {
  width: 132px;
  height: 132px;
}

.moon-caption strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.control {
  display: grid;
  gap: 8px;
}

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

.quick-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.quick-row button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}

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

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  user-select: none;
}

.toggle input {
  width: 18px;
  height: 18px;
  accent-color: var(--green);
}

@media (max-width: 960px) {
  .app-shell {
    padding: 16px;
  }

  .topbar,
  .sim-grid {
    display: block;
  }

  .phase-badge {
    margin-top: 14px;
  }

  .control-panel {
    margin-top: 14px;
  }
}

@media (max-width: 520px) {
  .readout,
  .moon-view {
    grid-template-columns: 1fr;
  }

  .quick-row {
    grid-template-columns: repeat(2, 1fr);
  }
}