/* ============================================
   style-preview.css - 预览区 Markdown 样式
   ============================================ */

/* 标题 */
.preview-container #preview h1,
.preview-container #preview h2,
.preview-container #preview h3,
.preview-container #preview h4,
.preview-container #preview h5,
.preview-container #preview h6 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
}

.preview-container #preview h1 {
    font-size: 2em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}

.preview-container #preview h2 {
    font-size: 1.5em;
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
}

.preview-container #preview h3 { font-size: 1.25em; }
.preview-container #preview h4 { font-size: 1em; }
.preview-container #preview h5 { font-size: 0.875em; }
.preview-container #preview h6 { font-size: 0.85em; color: #6a737d; }

/* 段落和列表 */
.preview-container #preview p {
    margin-top: 0;
    margin-bottom: 16px;
    line-height: 1.6;
}

.preview-container #preview ul,
.preview-container #preview ol {
    padding-left: 2em;
    margin-top: 0;
    margin-bottom: 16px;
}

.preview-container #preview ul { list-style-type: disc; }
.preview-container #preview ol { list-style-type: decimal; }
.preview-container #preview li { margin: 0.25em 0; }
.preview-container #preview li > p { margin-top: 16px; }

/* 引用 */
.preview-container #preview blockquote {
    padding: 0 1em;
    color: #6a737d;
    border-left: 0.25em solid #dfe2e5;
    margin: 0 0 16px 0;
}

.preview-container #preview blockquote > :first-child { margin-top: 0; }
.preview-container #preview blockquote > :last-child { margin-bottom: 0; }

/* 代码 */
.preview-container #preview code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: rgba(27, 31, 35, 0.25);
    border-radius: 3px;
    font-family: monospace;
}

.preview-container #preview pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    /* 背景色由 highlight.js 主题控制，不再覆盖 */
    border-radius: 6px;
    margin: 0 0 16px 0;
}

.preview-container #preview pre code {
    background-color: transparent;
    padding: 0;
    font-size: inherit;
}

/* 其他元素 */
.preview-container #preview hr {
    height: 0.25em;
    padding: 0;
    margin: 24px 0;
    background-color: #e1e4e8;
    border: 0;
}

.preview-container #preview a {
    color: #0366d6;
    text-decoration: none;
}

.preview-container #preview a:hover {
    text-decoration: underline;
}

.preview-container #preview img {
    max-width: 100%;
    box-sizing: content-box;
    background-color: #fff;
}

/* 表格 */
.preview-container #preview table {
    border-spacing: 0;
    border-collapse: collapse;
    margin: 0 0 16px 0;
    width: 100%;
    overflow: auto;
    display: block;
}

.preview-container #preview table th,
.preview-container #preview table td {
    padding: 6px 13px;
    border: 1px solid #dfe2e5;
}

.preview-container #preview table th {
    font-weight: 600;
    background-color: #f6f8fa;
}

.preview-container #preview table tr {
    background-color: #fff;
    border-top: 1px solid #c6cbd1;
}

.preview-container #preview table tr:nth-child(2n) {
    background-color: #f6f8fa;
}

/* 复选框 */
.preview-container #preview input[type="checkbox"] {
    margin-right: 0.5em;
}

/* ============================================
   代码块行号样式
   ============================================ */

pre.line-numbers {
    position: relative;
    padding-left: 3.8em !important;
    counter-reset: linenumber;
}

pre.line-numbers > code {
    position: relative;
    padding-left: 0 !important;
}

/* 每一行 */
pre.line-numbers > code > .code-line {
    display: block;
    position: relative;
}

pre.line-numbers > code > .code-line::before {
    counter-increment: linenumber;
    content: counter(linenumber);
    position: absolute;
    left: -3.5em;
    width: 3em;
    text-align: right;
    padding-right: 0.5em;
    color: #999;
    border-right: 1px solid #ddd;
    margin-right: 0.5em;
    user-select: none;
    font-size: 0.9em;
}