html, body {
    height: 100%;
}

.content-wrapper {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
}

@media (min-width: 992px) {
    .content-wrapper {
        height: calc(100vh - 120px);
    }
}

#pdf-viewer {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    border: 1px solid #ccc;
    position: relative;
    border-radius: 10px;
}

.pdf-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    color: #ccc;
    text-align: center;
    user-select: none; /* 防止文本被选中 */
    -webkit-user-select: none; /* Safari 支持 */
    -moz-user-select: none; /* Firefox 支持 */
    -ms-user-select: none; /* IE/Edge 支持 */
}

.pdf-placeholder i {
    font-size: 48px;
    margin-bottom: 10px;
}
#Q {
    resize: none;
    overflow-y: auto;
    min-height: 38px;
    max-height: 200px;
    border-radius: 10px;
}

#send-button, #clear-chat {
    height: 38px;
    white-space: nowrap;
}

.d-flex .flex-column {
    width: 110px; /* 调整按钮容器的宽度 */
}

#chat-container {
    height: calc(100% - 80px);
    overflow-y: auto;
    border-radius: 10px;
}

.message {
    margin-bottom: 10px;
    padding: 5px;
    border-radius: 5px;
}

.user-message {
    background-color: #e6f3ff;
}

.ai-message {
    background-color: #f0f0f0;
}

.custom-file-label::after {
    content: "浏览";
}

.page-container {
    position: relative;
    margin-bottom: 10px;
}

.text-layer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 0.2;
    line-height: 1.0;
}

    .text-layer > span {
        color: transparent;
        position: absolute;
        white-space: pre;
        cursor: text;
        transform-origin: 0% 0%;
    }

    .text-layer ::selection {
        background: black
    }

.selection-tools {
    position: fixed;
    background: white;
    border-radius: 10px;
    padding: 5px;
    display: none;
    z-index: 1000;
    border: 1px solid lightgray;
    background-color: ghostwhite;
}

#suggested-questions {
    display: none; /* 初始隐藏建议问题区域 */
}

.suggested-question {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 10px;
    position: relative;
    cursor: pointer;
    min-height: 50px; /* 添加最小高度 */
}

    .suggested-question:hover {
        background-color: #e9ecef;
    }

    .suggested-question .close-btn {
        position: absolute;
        top: 5px;
        right: 5px;
        border: none;
        background: none;
        font-size: 1.2rem;
        line-height: 1;
        padding: 0;
        cursor: pointer;
    }

#pageList {
    max-height: 600px;
    overflow-y: auto;
    overflow-x: hidden;
}

    #pageList .dropdown-item {
        margin-left: 0;
    }

.camera-icon {
    width: 24px !important;
    height: 24px !important;
    vertical-align: middle;
}