/* Toast Notification */
#toast-container {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 10002;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}
.toast {
    background-color: #333;
    color: white;
    padding: 12px 20px;
    margin-bottom: 10px;
    border-radius: 4px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    font-size: 13px;
    min-width: 200px;
    max-width: 300px;
    pointer-events: none; /* クリック透過 */
}
.toast.success { border-left: 4px solid #4CAF50; }
.toast.error { border-left: 4px solid #f44336; }
.toast.show { opacity: 1; pointer-events: auto; }