.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(3px);
  z-index: 99999; /* 一番上 */
}
 .overlayMenu{
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(1);
  width: 90vw;
  max-width: 480px;
  background: var(--chip-bg);
  border: 2px solid var(--chip-border);
  border-radius: 16px;
  padding: 2em;
  overflow: hidden;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  animation: fadeIn 0.3s ease;
  z-index: 100000; /* overlayより上 */
}
.overlayMenu::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #071022 0%, #071727 100%);
  z-index: -1;
  border-radius: 16px;
}
.option {
  display: flex;
  align-items: center;
  gap: 0.5em;
  margin: 1em 0;
  font-size: 0.95rem;
  color: var(--text);
}
.option input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}
.option input[type="text"],
.option input[type="password"] {
  width: 100%;
  padding: 0.6em 0.8em;
  font-size: 0.95rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--chip-border);
  border-radius: 8px;
  outline: none;
  transition: border 0.2s, background 0.2s;
}

.option input[type="text"]:focus,
.option input[type="password"]:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
}
.overlayMenu p {
  line-height: 1.6;
  font-size: 0.95rem;
  color: var(--muted-2);
}
.overlayMenu a {
  color: var(--accent);
  text-decoration: none;
}
.overlayMenu a:hover {
  text-decoration: underline;
}
.overlayMenu button {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 0.8em;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
.overlayMenu button:hover {
  background: #9de8ff;
}
.overlayFlex {
  display: flex;
  gap: 10px;
}
.overlayFlex * {
  flex: 1;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}