:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel: rgba(17, 20, 29, 0.78);
  --border: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.9);
}

html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  overflow: hidden;
}

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
}

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.35);
  z-index: 20;
}

.overlay[hidden] {
  display: none !important;
}

.overlay-card {
  width: min(520px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 14px 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.overlay-title {
  font-weight: 800;
  letter-spacing: 0.2px;
  margin-bottom: 6px;
}

.overlay-body {
  opacity: 0.82;
  font-size: 13px;
  line-height: 1.35;
}

.overlay-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
}

.overlay-label {
  font-size: 12px;
  opacity: 0.75;
}

select {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 650;
}

.overlay-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.overlay-actions button:nth-child(n + 4) {
  grid-column: span 3;
}

button {
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

button:active {
  transform: translateY(1px);
}

.tune {
  position: fixed;
  right: 14px;
  top: 14px;
  z-index: 10;
}

.tune[hidden] {
  display: none !important;
}

.tune-card {
  width: min(420px, calc(100vw - 28px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 12px 10px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.tune-title {
  font-weight: 800;
  letter-spacing: 0.2px;
  margin-bottom: 10px;
}

.tune-grid {
  display: grid;
  grid-template-columns: 120px 1fr 80px;
  gap: 10px;
  align-items: center;
}

.tune-label {
  font-size: 12px;
  opacity: 0.75;
}

.tune-val {
  font-variant-numeric: tabular-nums;
  text-align: right;
  font-size: 12px;
  opacity: 0.85;
}

input[type="range"] {
  width: 100%;
  accent-color: rgba(130, 170, 255, 0.9);
}

.tune-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 10px;
}