.flash-icon {
  animation: flash 3s infinite;
}

/* money用：黄色点滅 */
.gold {
  color: gold;
  animation-name: flash-money;
}

@keyframes flash-money {
  0%, 100% { color: gold; text-shadow: 0 0 5px orange; }
  50%      { color: gray; text-shadow: none; }
}

/* message用：青色点滅 */
.blue {
  color: dodgerblue;
  animation-name: flash-message;
}

@keyframes flash-message {
  0%, 100% { color: dodgerblue; text-shadow: 0 0 5px skyblue; }
  50%      { color: gray; text-shadow: none; }
}


  .navbar-brand:hover {
    background-color: #f0f0f0;  /* 背景を薄グレーに */
    color: #0d6efd !important;  /* Bootstrapのprimary色に */
    border-radius: 5px;
    padding: 5px 10px;
    transition: background-color 0.3s;
  }