.alert-box {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #ffc107;
    color: #212529;
    font-size: 16px;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    z-index: 1000;
}

.alert-box.show {
    opacity: 1;
    visibility: visible;
}

.alert-box .closeBtn {
    margin-left: 15px;
    color: #212529;
    font-weight: bold;
    float: right;
    font-size: 22px;
    line-height: 20px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .alert-box {
        top: 10px;
        right: 10px;
        padding: 12px 16px;
        font-size: 14px;
        max-width: 90%; /* 너무 길어지지 않도록 제한 */
        word-break: break-word; /* 긴 문장 줄바꿈 */
    }

    .alert-box .closeBtn {
        font-size: 18px;
        line-height: 18px;
        margin-left: 10px;
    }
}