/* ==========================================================================
   theme.css - 个人博客 UI 增强
   主题色：湖蓝 #3b82f6
   字体：Inter (英文) + Noto Sans SC (思源黑体)
   ========================================================================== */

/* Google Fonts 国内镜像（font.im） */
@import url("https://fonts.font.im/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap");

/* ===== CSS 变量 ===== */
:root {
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-bg: rgba(59, 130, 246, 0.08);
    --font-body: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-heading: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ===== 全局字体与节奏 ===== */
body {
    font-family: var(--font-body);
    line-height: 1.75;
    font-feature-settings: "tnum", "ss01";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    letter-spacing: -0.01em;
    line-height: 1.4;
    font-weight: 600;
}

code, pre, kbd {
    font-family: var(--font-mono);
}

.post-content p {
    margin: 1em 0;
}

/* ===== 链接主题色 ===== */
a {
    color: var(--accent);
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

/* ===== 首页列表卡片化 ===== */
.post-item {
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border-radius: 6px;
    padding: 0.5rem 0.8rem;
    display: block;
}

.post-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
    background: var(--accent-bg);
}

.post-desc {
    color: #888;
    font-size: 0.85rem;
    line-height: 1.6;
    margin-top: 0.25rem;
    padding-left: 0.2rem;
    display: block;
}

/* ===== 代码块：圆角 + 左侧主题色竖条 ===== */
.highlight {
    border-radius: 8px;
    border-left: 4px solid var(--accent);
    overflow: hidden;
    margin: 1.2rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.highlight pre {
    padding: 1.2em 1.4em !important;
    line-height: 1.65;
    margin: 0;
}

/* 行内代码 */
:not(pre) > code {
    background: var(--accent-bg);
    color: var(--accent);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
}

/* ===== 图片：圆角 + 阴影 + 居中 + hover 放大 ===== */
.post-content img {
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 100%;
    display: block;
    margin: 1.5rem auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.post-content img:hover {
    transform: scale(1.015);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* ===== blockquote：左竖条 + 浅色背景块 ===== */
blockquote {
    border-left: 4px solid var(--accent);
    background: var(--accent-bg);
    padding: 0.8rem 1.2rem;
    border-radius: 0 6px 6px 0;
    margin: 1.2rem 0;
    color: inherit;
}

blockquote::before,
blockquote::after {
    content: none !important;
}

blockquote p {
    margin: 0.4em 0;
}

/* ===== TOC 主题色 hover ===== */
.toc-sidebar #TableOfContents a:hover {
    color: var(--accent);
    opacity: 1;
}

.toc-title {
    color: var(--accent);
    border-bottom-color: var(--accent-bg) !important;
}

/* ===== 标签样式 ===== */
.post-tags li a,
.tag a,
.post-tag {
    background: var(--accent-bg);
    color: var(--accent) !important;
    border-radius: 4px;
    padding: 0.15rem 0.55rem;
    transition: background 0.2s;
}

.post-tags li a:hover,
.tag a:hover {
    background: rgba(59, 130, 246, 0.18);
}

/* ===== 表格样式 ===== */
.post-content table {
    border-collapse: collapse;
    margin: 1.2rem 0;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.post-content th {
    background: var(--accent-bg);
    color: var(--accent);
    font-family: var(--font-sans);
}

.post-content th,
.post-content td {
    padding: 0.6rem 1rem;
    border: 1px solid rgba(128, 128, 128, 0.15);
}

/* ===== 水平分隔线 ===== */
hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(128, 128, 128, 0.3), transparent);
    margin: 2rem 0;
}

/* ===== 文章标题下方的 excerpt ===== */
.post-excerpt {
    color: #888;
    font-style: italic;
    border-left: 3px solid var(--accent);
    padding-left: 0.8rem;
    margin: 1rem 0 1.5rem;
}

/* ===== 暗色模式适配 ===== */
@media (prefers-color-scheme: dark) {
    .post-desc {
        color: #999;
    }

    .post-excerpt {
        color: #aaa;
    }

    .post-content img {
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    }

    .post-content img:hover {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
    }

    .post-item:hover {
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    }

    blockquote {
        background: rgba(59, 130, 246, 0.12);
    }

    .highlight {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }
}

/* 通过 body.dark 切换（主题自带按钮） */
body.dark .post-desc,
body.dark .post-excerpt {
    color: #aaa;
}

body.dark blockquote {
    background: rgba(59, 130, 246, 0.12);
}

body.dark .post-content img {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
}