/* ============================================================
   陶群的博客 · 全局增强样式
   包含：主题切换 / 代码复制按钮 / 文章目录(TOC) / 上一篇下一篇
         / 评论系统 / 归档页 / 文章元信息 / 懒加载过渡
   ============================================================ */

/* ---------- 主题变量（默认浅色） ---------- */
:root {
    --bg: #f2f2f2;
    --card-bg: #fff;
    --border: #e5e5e5;
    --text-main: #333;
    --text-sub: #666;
    --link-color: #333;
    --link-hover: #000;
    --code-bg: rgba(27, 31, 35, 0.05);
    --markdown-fg: #333;
    --accent: #1890ff;
}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    margin: 12px 12px 12px auto;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-main);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    transition: all 0.3s linear;
    vertical-align: middle;
    flex-shrink: 0;
}
.theme-toggle:hover {
    background: #f2f2f2;
}
.theme-toggle .icon-moon {
    display: block;
}
.theme-toggle .icon-sun {
    display: none;
}
html[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}
html[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

/* ---------- 头部 RSS 入口 ---------- */
.feed-link {
    position: relative;
    color: var(--text-sub) !important;
}
.feed-link:hover {
    color: var(--link-hover) !important;
}

/* ---------- 文章元信息（发布时间等） ---------- */
.paper-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 4px 0 10px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text-sub);
}
.paper-meta .meta-item {
    display: inline-flex;
    align-items: center;
}
.paper-meta .meta-item a {
    color: var(--text-sub);
}
.paper-meta .meta-item a:hover {
    color: var(--accent);
}

/* ---------- 代码复制按钮 ---------- */
.code-copy-wrap {
    position: relative;
    margin: 0;
}
.markdown-body .code-copy-wrap pre,
.note-single .code-copy-wrap pre {
    margin: 0;
    padding-right: 44px;
}
/* 代码行号列 */
.code-copy-wrap .code-line-nums {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2.4em;
    padding: 16px 8px 16px 0;
    box-sizing: border-box;
    background: rgba(0, 0, 0, 0.15);
    text-align: right;
    overflow: hidden;
    user-select: none;
    pointer-events: none;
}
.code-copy-wrap .code-line-nums span {
    display: block;
    font-size: 13px;
    line-height: 1.6;
    color: #6b7280;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.code-copy-wrap pre.has-line-nums {
    padding-left: 3.2em;
    padding-right: 44px;
}
.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 2;
    padding: 4px 10px;
    font-size: 12px;
    line-height: 1.5;
    color: #abb2bf;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s linear;
}
.code-copy-wrap:hover .code-copy-btn {
    opacity: 1;
}
.code-copy-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.16);
}
.code-copy-btn.copied {
    color: #67c23a;
    border-color: #67c23a;
}

/* ---------- 文章目录（TOC） ---------- */
.paper-toc {
    display: none;
    margin: 0 0 20px;
    padding: 14px 18px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 4px;
    font-size: 14px;
}
.paper-toc.show {
    display: block;
}
.paper-toc .toc-title {
    margin-bottom: 8px;
    font-weight: bold;
    color: var(--text-main);
}
.paper-toc ol, .paper-toc ul {
    margin: 0;
    padding-left: 18px;
    list-style: none;
}
.paper-toc li {
    line-height: 1.9;
}
.paper-toc a {
    color: var(--text-sub);
    display: inline-block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
    transition: color 0.3s linear;
}
.paper-toc a:hover {
    color: var(--accent);
}
.paper-toc .toc-h3 {
    padding-left: 14px;
    font-size: 13px;
}

/* ---------- 上一篇 / 下一篇 ---------- */
.prev-next {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 30px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
    font-size: 14px;
}
.prev-next a {
    display: block;
    max-width: 48%;
    padding: 10px 14px;
    background: var(--bg);
    border-radius: 4px;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: all 0.3s linear;
}
.prev-next a:hover {
    color: #fff;
    background: var(--accent);
}
.prev-next .pn-none {
    /* 占位，保持两端对齐 */
}
.prev-next .pn-label {
    display: block;
    font-size: 12px;
    color: var(--text-sub);
    margin-bottom: 2px;
}
.prev-next a:hover .pn-label {
    color: rgba(255, 255, 255, 0.85);
}

/* ---------- 评论系统 ---------- */
.paper-comments {
    margin: 34px 0 0;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}
.paper-comments .comments-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-main);
    margin-bottom: 16px;
}
.comment-form {
    margin-bottom: 24px;
}
.comment-form .comment-row {
    margin-bottom: 12px;
}
.comment-form input.comment-name {
    width: 240px;
    max-width: 100%;
    height: 36px;
    padding: 0 12px;
    box-sizing: border-box;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    background: var(--card-bg);
    color: var(--text-main);
}
.comment-form textarea.comment-content {
    width: 100%;
    min-height: 90px;
    padding: 10px 12px;
    box-sizing: border-box;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    line-height: 1.6;
    background: var(--card-bg);
    color: var(--text-main);
    font-family: inherit;
}
.comment-form .comment-tip {
    font-size: 12px;
    color: var(--text-sub);
    margin-bottom: 8px;
}
.comment-form .comment-submit {
    padding: 8px 22px;
    font-size: 14px;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s linear;
}
.comment-form .comment-submit:hover {
    opacity: 0.85;
}
.comment-form .comment-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.comment-form .comment-msg {
    margin-left: 12px;
    font-size: 13px;
    color: #e6a23c;
}

.comment-list .comment-item {
    padding: 14px 16px;
    margin-bottom: 12px;
    background: var(--bg);
    border-radius: 6px;
}
.comment-item .comment-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}
.comment-item .comment-name {
    font-size: 14px;
    font-weight: bold;
    color: var(--accent);
}
.comment-item .comment-time {
    font-size: 12px;
    color: var(--text-sub);
}
.comment-item .comment-body {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-main);
    overflow-wrap: break-word;
    word-break: break-word;
    white-space: pre-wrap;
}
.comment-empty {
    padding: 20px;
    text-align: center;
    font-size: 14px;
    color: var(--text-sub);
    background: var(--bg);
    border-radius: 4px;
}

/* ---------- 归档页 ---------- */
.archive-page {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    max-width: 1200px;
    margin: 20px auto;
}
.archive-page .archive-wrap {
    flex: 1 1 auto;
    max-width: 900px;
    min-width: 0;
    margin: 20px auto;
}
.archive-group {
    background: var(--card-bg);
    border-radius: 5px;
    padding: 18px 22px;
    margin-bottom: 18px;
    box-sizing: border-box;
}
.archive-group h3 {
    font-size: 18px;
    color: var(--text-main);
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.archive-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.archive-group li {
    padding: 4px 0;
}
.archive-group li a {
    display: inline-block;
    max-width: 100%;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-sub);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
    transition: color 0.3s linear;
}
.archive-group li a:hover {
    color: var(--accent);
}
.archive-group li a::before {
    content: "· ";
    color: var(--accent);
}

/* ---------- 懒加载图片过渡 ---------- */
img.lazy-img {
    opacity: 0;
    transition: opacity 0.5s ease;
}
img.lazy-img.loaded {
    opacity: 1;
}

/* ---------- 平滑滚动（锚点跳转） ---------- */
html[data-theme] {
    scroll-behavior: smooth;
}

/* ============================================================
   深色模式覆盖（html[data-theme="dark"]）
   ============================================================ */
html[data-theme="dark"] {
    --bg: #1a1d21;
    --card-bg: #22262b;
    --border: #33383f;
    --text-main: #d0d4d9;
    --text-sub: #9aa3ad;
    --link-color: #d0d4d9;
    --link-hover: #fff;
    --markdown-fg: #cdd3da;
    scrollbar-color: #3a4048 #1a1d21;
}

html[data-theme="dark"] body {
    background: var(--bg);
}

/* 头部 */
html[data-theme="dark"] .header-fixed {
    background: var(--card-bg);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.4);
}
html[data-theme="dark"] .header a {
    color: var(--text-main);
}
html[data-theme="dark"] .header a:hover {
    background: var(--bg);
}
html[data-theme="dark"] .header .head-search-bar {
    border-color: var(--border);
}
html[data-theme="dark"] .header .head-serch-input {
    background: transparent;
    color: var(--text-main);
}
html[data-theme="dark"] .header .head-search-submit {
    color: var(--text-sub);
}

/* 卡片类 */
html[data-theme="dark"] .paper-single,
html[data-theme="dark"] .paper-detail-wrap,
html[data-theme="dark"] .note-single,
html[data-theme="dark"] .paging,
html[data-theme="dark"] .page-list-no-data,
html[data-theme="dark"] .search-bar,
html[data-theme="dark"] .notes-create,
html[data-theme="dark"] .side-paper .user-info,
html[data-theme="dark"] .side-paper .side-paper-wrap,
html[data-theme="dark"] .archive-group {
    background: var(--card-bg);
}

html[data-theme="dark"] .paper-single .paper-title,
html[data-theme="dark"] .paper-detail-wrap .paper-title,
html[data-theme="dark"] .paper-single .paper-title:hover,
html[data-theme="dark"] .paging a,
html[data-theme="dark"] .side-paper .module-title,
html[data-theme="dark"] .side-paper .user-name {
    color: var(--text-main);
}
html[data-theme="dark"] .paper-single .paper-content,
html[data-theme="dark"] .paper-detail-wrap .paper-content,
html[data-theme="dark"] .paper-single .read-more a,
html[data-theme="dark"] .side-paper .side-paper-title a {
    color: var(--text-sub);
}
html[data-theme="dark"] .paging a:hover,
html[data-theme="dark"] .paging a.active {
    color: #fff;
    background: var(--text-main);
}
html[data-theme="dark"] .side-paper .side-paper-title a:hover,
html[data-theme="dark"] .paper-single .read-more a:hover {
    color: var(--link-hover);
}
html[data-theme="dark"] .side-paper .module-title {
    border-bottom-color: var(--border);
}
html[data-theme="dark"] .side-paper .user-avatar {
    background: var(--bg);
    border-color: var(--border);
}

/* markdown 正文 */
html[data-theme="dark"] .markdown-body {
    color: var(--markdown-fg);
    background-color: transparent !important;
}
html[data-theme="dark"] .markdown-body h1,
html[data-theme="dark"] .markdown-body h2,
html[data-theme="dark"] .markdown-body h3,
html[data-theme="dark"] .markdown-body h4,
html[data-theme="dark"] .markdown-body h5,
html[data-theme="dark"] .markdown-body h6 {
    color: var(--text-main);
}
html[data-theme="dark"] .markdown-body blockquote {
    color: var(--text-sub);
    border-left-color: #3a4048;
}
html[data-theme="dark"] .markdown-body table tr {
    background-color: transparent;
}
html[data-theme="dark"] .markdown-body table th,
html[data-theme="dark"] .markdown-body table td {
    border-color: var(--border);
}
html[data-theme="dark"] .markdown-body code,
html[data-theme="dark"] .markdown-body tt {
    background-color: var(--code-bg);
    color: #e0627e;
}
html[data-theme="dark"] .markdown-body pre,
html[data-theme="dark"] .markdown-body pre code {
    background: #282c34;
    color: #abb2bf;
}
html[data-theme="dark"] .markdown-body hr {
    background-color: var(--border);
}
html[data-theme="dark"] .markdown-body a {
    color: #58a6ff;
}

/* 输入控件 */
html[data-theme="dark"] .comment-form input.comment-name,
html[data-theme="dark"] .comment-form textarea.comment-content,
html[data-theme="dark"] .notes-create textarea {
    background: var(--bg);
    color: var(--text-main);
    border-color: var(--border);
}

/* 移动端间距 */
@media screen and (max-width: 768px) {
    .paper-meta {
        gap: 8px;
        font-size: 12px;
    }
    .prev-next {
        flex-direction: column;
    }
    .prev-next a {
        max-width: 100%;
    }
    .comment-form input.comment-name {
        width: 100%;
    }
    .code-copy-btn {
        opacity: 1;
    }
}

/* 平板 */
@media screen and (min-width: 768px) and (max-width: 992px) {
    .archive-page {
        padding: 0 12px;
    }
}