.overlay-ui {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 30;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  pointer-events: none;
}

.overlay-card {
  background: rgba(17, 10, 4, 0.68);
  border: 1px solid rgba(139, 99, 64, 0.7);
  border-radius: 4px;
  padding: 8px;
  backdrop-filter: blur(2px);
  pointer-events: auto;
}

.overlay-panel {
  width: min(90vw, 360px);
  padding: 7px 8px;
  opacity: 0;
  transform: translateY(8px) scale(0.98);
  transform-origin: bottom right;
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.overlay-ui.open .overlay-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.overlay-toggle {
  width: 56px;
  height: 56px;
  border-radius: 999px;
  border: 1px solid rgba(139, 99, 64, 0.95);
  background: rgba(32, 17, 7, 0.88);
  color: var(--parchment);
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
  transition: background 0.18s, transform 0.16s;
}

.overlay-toggle:hover { background: rgba(50, 29, 14, 0.96); }
.overlay-ui.open .overlay-toggle { transform: scale(0.96); }

.overlay-head {
  text-align: center;
  margin-bottom: 6px;
}

.overlay-title {
  font-family: 'Playfair Display', serif;
  color: var(--parchment);
  font-size: 0.9rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  margin-bottom: 0;
  opacity: 0.6;
}

.board-size {
  margin-top: 4px;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(200,169,122,0.6);
}

.controls {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.btn {
  font-family: 'Courier Prime', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 11px;
  border: 1px solid var(--parchment-dark);
  background: transparent;
  color: var(--parchment);
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.18s, color 0.18s;
  position: relative;
}

.btn:hover { background: var(--parchment-dark); color: var(--aged-white); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  font-size: 0;
}

.share-status {
  width: 100%;
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  color: rgba(200,169,122,0.58);
  align-self: center;
  text-align: center;
}

@media (max-width: 900px), (max-height: 760px) {
  .overlay-ui { right: 10px; bottom: 10px; gap: 8px; }
  .overlay-panel { width: min(92vw, 320px); padding: 6px 7px; }
  .overlay-card { padding: 6px; }
  .overlay-toggle { width: 50px; height: 50px; font-size: 1.18rem; }
  .overlay-title { font-size: 0.78rem; letter-spacing: 0.28em; }
  .board-size { font-size: 0.54rem; letter-spacing: 0.18em; }
  .btn { font-size: 0.62rem; padding: 4px 8px; }
  .controls { gap: 5px; }
}