body {
    background: #f5f5f5;
    padding: 2em 0;
}

/* 模拟 A4 纸比例 (1:1.414, 即 210mm:297mm) */
.preview-paper {
    background-color: white;
    width: 100%;
    height: 0;
    padding-bottom: 141.4%; /* A4 比例 */
    position: relative;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.preview-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5%;
}

#qrcode {
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible; /* 允许内容溢出 */
}

#qrcode canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* 确保左右卡片内容区域高度一致 */
.ui.card .content {
    min-height: 400px;
    display: flex;
    padding: 1em !important;
}

/* 确保左右卡片高度一致 */
.ui.two.column.grid > .column {
    display: flex;
}

.ui.fluid.card {
    width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.ui.card > .content {
    flex-grow: 1;
}

/* 右侧卡片内容区适应 A4 比例 */
.preview-card .content {
    padding: 1em !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 输入区样式优化 */
.form-content {
    display: flex;
    flex-direction: column;
    padding-bottom: 1em !important;
}

.ui.form {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.ui.form .field {
    margin-bottom: 1em;
}

.ui.form textarea {
    min-height: 80px;
    resize: vertical;
}

/* 自动拉伸中间区域 */
.ui.form .field:nth-child(2) textarea {
    flex-grow: 2;
}

/* 优化按钮间距与布局 */
.button-fields {
    margin-top: auto !important;
    margin-bottom: 0 !important;
}

.button-fields .field {
    padding: 0 !important;
    margin-bottom: 0.75em !important; /* 增加了按钮间间距 */
}

.button-fields .field:last-child {
    margin-bottom: 0 !important;
}

/* 优化按钮容器 */
.button-container {
    margin-top: auto !important;
    padding: 0 !important;
}

/* 按钮间距调整 */
.ui.two.buttons {
    gap: 10px; /* 增加按钮之间的间距 */
    display: flex;
}

/* 确保按钮宽度相等 */
.ui.two.buttons .button {
    margin: 0 !important;
    flex: 1;
}

/* 为打印按钮添加一点视觉区分 */
#printBtn {
    box-shadow: none !important;
    border: 1px solid #e0e1e2 !important;
    background-color: #f8f9fa !important;
}

#printBtn:hover {
    background-color: #e9ecef !important;
}

/* 打印样式 */
@media print {
    @page {
        size: A4 portrait;
        margin: 0;
    }
    
    html, body {
        width: 100%;
        height: 100%;
        margin: 0;
        padding: 0;
        background-color: #fff;
    }
    
    .ui.container, .ui.grid, .ui.basic.segment {
        display: none !important;
    }
    
    /* 显示打印容器 */
    #print-container {
        display: block !important;
        position: fixed;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        z-index: 9999;
        background: white;
    }
    
    #print-container canvas {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        max-width: 90%;
        max-height: 90%;
        height: auto !important;
    }
}

/* 打印专用容器（正常不显示） */
#print-container {
    display: none;
}