.container {
            
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            margin-bottom: 30px;
        }
        .prefecture-button {
            background-color: #000;
            color: #FFCD00;
            cursor: pointer;
            padding: 12px 15px;
            width: 100%;
            text-align: left;
            border: none;
            outline: none;
            font-size: 16px;
            transition: 0.4s;
            position: relative;
            border: 2px solid #FFCD00; box-sizing: border-box; border-radius: .3em;
        }
        .prefecture-button:hover {
            background-color: #FFCD00; color: #000;
        }
        .prefecture-button:after {
            content: '+'; /* "➕" Unicode character */
            font-size: 20px;
            color: #FFCD00;
            float: right;
        }
        .prefecture-button.active:after {
            content: "-"; /* "➖" Unicode character */
        }
.prefecture-button:hover:after { color: #000;}
        .panel {
            padding: 0;
            background-color:rgba(255,255,255,0.05);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out; margin-bottom: 10px;
        }
        .store-item {
            padding: 15px;
            border-bottom: 1px solid rgba(255,255,255,0.2);
        }
        .store-item:last-child {
            border-bottom: none;
        }
        .store-name {
            font-weight: bold;
            margin-bottom: 5px;
            color: #FFCD00; font-size: 120%;
        }
        .store-address {
            color: #fff;
        }
        .loading {
            text-align: center;
            padding: 20px;
            font-size: 18px;
            color: #fff;
        }
        .error {
            color: #d9534f;
            text-align: center;
            padding: 20px;
        }