/* 前端二维码生成器 — 自适应宽度版 */
:root {
    --wuchai-primary: #2563eb;
    --wuchai-primary-hover: #1d4ed8;
    --wuchai-success: #10b981;
    --wuchai-success-hover: #059669;
    --wuchai-bg: #ffffff;
    --wuchai-border: #e5e7eb;
    --wuchai-text: #333333;
    --wuchai-text-secondary: #666666;
    --wuchai-radius: 12px;
    --wuchai-shadow: 0 2px 24px rgba(0,0,0,0.06);
}

.wuchai-qr-generator-wrap {
    width: 100%;
    max-width: 800px;
    margin: 24px auto;
    padding: 32px;
    background: var(--wuchai-bg);
    border-radius: var(--wuchai-radius);
    box-shadow: var(--wuchai-shadow);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    box-sizing: border-box;
}

/* ========== 标签导航 ========== */
.wuchai-qr-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f0f0;
}
.wuchai-qr-tab {
    padding: 8px 16px;
    border: none;
    background: #f5f7fa;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    color: var(--wuchai-text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
}
.wuchai-qr-tab:hover {
    background: #e8ecf1;
    color: var(--wuchai-text);
}
.wuchai-qr-tab.active {
    background: var(--wuchai-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

/* ========== 表单 ========== */
.wuchai-qr-form {
    margin-bottom: 16px;
}
.wuchai-qr-field {
    margin-bottom: 16px;
    animation: wuchaiFadeIn 0.25s ease;
}
@keyframes wuchaiFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
.wuchai-qr-field label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--wuchai-text);
    font-size: 13px;
}
.wuchai-qr-field input[type="text"],
.wuchai-qr-field input[type="email"],
.wuchai-qr-field input[type="datetime-local"],
.wuchai-qr-field textarea,
.wuchai-qr-field select {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--wuchai-border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--wuchai-text);
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    font-family: inherit;
    background: #fafbfc;
}
.wuchai-qr-field input:focus,
.wuchai-qr-field textarea:focus,
.wuchai-qr-field select:focus {
    outline: none;
    border-color: var(--wuchai-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.08);
    background: #fff;
}
.wuchai-qr-field textarea {
    resize: vertical;
    min-height: 80px;
}

/* ========== 双列布局 ========== */
.wuchai-qr-row {
    display: flex;
    gap: 14px;
    margin-bottom: 0;
}
.wuchai-qr-col {
    flex: 1;
}
.wuchai-qr-col-2 {
    flex: 1 1 calc(50% - 7px);
    min-width: 0;
}

/* ========== 按钮 ========== */
.wuchai-qr-btn {
    display: inline-block;
    width: 100%;
    padding: 13px 28px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s ease;
    background: var(--wuchai-primary);
    color: #fff;
    text-align: center;
    box-sizing: border-box;
}
.wuchai-qr-btn:hover {
    background: var(--wuchai-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(37,99,235,0.25);
}
.wuchai-qr-btn:active {
    transform: translateY(0);
}
.wuchai-qr-btn-secondary {
    background: var(--wuchai-success);
}
.wuchai-qr-btn-secondary:hover {
    background: var(--wuchai-success-hover);
    box-shadow: 0 6px 18px rgba(16,185,129,0.25);
}
.wuchai-qr-btn-outline {
    background: transparent;
    border: 2px solid #d1d5db;
    color: var(--wuchai-text-secondary);
}
.wuchai-qr-btn-outline:hover {
    border-color: var(--wuchai-primary);
    color: var(--wuchai-primary);
    background: rgba(37,99,235,0.04);
}

/* ========== 预览区 ========== */
.wuchai-qr-preview {
    text-align: center;
    margin-top: 28px;
    padding: 28px 20px;
    background: #f9fafb;
    border-radius: var(--wuchai-radius);
    animation: wuchaiSlideUp 0.35s ease;
}
@keyframes wuchaiSlideUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
.wuchai-qr-preview-header h3 {
    margin: 0 0 16px;
    color: var(--wuchai-text);
    font-size: 17px;
}
.wuchai-qr-image-wrap {
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    display: inline-block;
    box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}
.wuchai-qr-image-wrap img {
    display: block;
    max-width: 100%;
    width: auto;
    height: auto;
    border-radius: 4px;
}
.wuchai-qr-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
}
.wuchai-qr-actions .wuchai-qr-btn {
    width: auto;
    padding: 10px 24px;
    font-size: 14px;
}
.wuchai-qr-info {
    margin-top: 14px;
    font-size: 12px;
    color: #999;
    word-break: break-all;
}

/* ========== 加载状态 ========== */
.wuchai-qr-loading {
    text-align: center;
    padding: 24px;
    color: var(--wuchai-text-secondary);
    font-size: 14px;
}
.wuchai-qr-spinner {
    display: inline-block;
    width: 22px;
    height: 22px;
    border: 3px solid #e5e7eb;
    border-top-color: var(--wuchai-primary);
    border-radius: 50%;
    animation: wuchaiSpin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 10px;
}
@keyframes wuchaiSpin {
    to { transform: rotate(360deg); }
}

/* ========== 错误提示 ========== */
.wuchai-qr-error {
    padding: 12px 16px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    border-radius: 8px;
    margin-top: 16px;
    font-size: 14px;
    animation: wuchaiFadeIn 0.3s ease;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .wuchai-qr-generator-wrap {
        max-width: 100%;
        margin: 12px 8px;
        padding: 20px 16px;
    }
    .wuchai-qr-row {
        flex-direction: column;
        gap: 0;
    }
    .wuchai-qr-col-2 {
        flex: 1 1 100%;
    }
    .wuchai-qr-tabs {
        gap: 4px;
    }
    .wuchai-qr-tab {
        padding: 6px 12px;
        font-size: 12px;
    }
    .wuchai-qr-actions {
        flex-direction: column;
    }
    .wuchai-qr-actions .wuchai-qr-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .wuchai-qr-generator-wrap {
        padding: 14px 10px;
        border-radius: 8px;
    }
    .wuchai-qr-tab {
        flex: 1 1 auto;
        text-align: center;
        font-size: 11px;
        padding: 6px 8px;
    }
    .wuchai-qr-field input,
    .wuchai-qr-field textarea,
    .wuchai-qr-field select {
        font-size: 16px; /* 防止 iOS 缩放 */
        padding: 10px 12px;
    }
}


/* 样式设置区域样式 */
.wuchai-qr-styles {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin: 20px 0;
}

.wuchai-qr-styles h4 {
    color: #333;
    font-size: 16px;
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

/* 颜色选择器样式 */
input[type="color"] {
    width: 100%;
    height: 40px;
    border: 2px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    padding: 2px;
}

/* 滑块样式 */
input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #e0e0e0;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #2563eb;
    cursor: pointer;
}

/* 文件上传样式 */
input[type="file"] {
    width: 100%;
    padding: 8px;
    border: 2px dashed #ddd;
    border-radius: 6px;
    background: #f9f9f9;
    cursor: pointer;
}

input[type="file"]:hover {
    border-color: #2563eb;
    background: #f0f7ff;
}

/* 预览图片样式 */
#qr_bg_preview {
    display: flex;
    align-items: center;
    gap: 10px;
}

#qr_bg_preview_img {
    border: 2px solid #ddd;
    border-radius: 4px;
    padding: 2px;
    background: white;
}

#qr_bg_remove {
    padding: 4px 12px;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

#qr_bg_remove:hover {
    background: #dc2626;
}


/* 预览容器 */
#qr_bg_preview {
    display: none; /* 默认隐藏，上传后显示 */
    margin-top: 10px;
    width: 100%;
    max-width: 300px; /* 限制最大宽度，防止太大 */
    border: 1px solid #ddd;
    padding: 5px;
    background: #f9f9f9;
}

/* 预览图片核心样式 */
#qr_bg_preview_img {
    width: 100%;       /* 宽度撑满容器 */
    height: auto;      /* 高度自动，保持原始比例 */
    object-fit: contain; /* 确保图片完整显示，不留黑边，也不裁剪 */
    display: block;
}


/* 合成容器 */
#qr-composite-container {
    /* 初始大小由背景图决定，JS会动态调整 */
    min-width: 200px;
    min-height: 200px;
    background-color: #f0f0f0; /* 默认底色，防止透明背景看不清 */
}

/* 背景图 */
#composite-bg-img {
    display: block;
    width: 100%;
    height: auto;
}

/* 二维码图层 */
#wuchai-qr-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* 关键：让二维码适应背景图的大小，保持比例 */
    object-fit: contain; 
    /* 如果希望二维码居中且不被拉伸，可以用 object-fit: none; 并配合 margin:auto */
}


#qr_bg_preview {
    display: block !important;
    visibility: visible !important;
}