/* 主题变量 */
:root {
  /* Light 模式 */
  --background: #ffffff;
  --foreground: #000000;
  --muted: #f5f5f5;
  --muted-foreground: #737373;
  --border: #e5e5e5;
  --card: #ffffff;
  --card-foreground: #000000;
  --popover: #ffffff;
  --popover-foreground: #000000;
  --primary: #000000;
  --primary-foreground: #ffffff;
  --secondary: #f5f5f5;
  --secondary-foreground: #000000;
  --accent: #f5f5f5;
  --accent-foreground: #000000;
  --destructive: #ef4444;
  --destructive-foreground: #ffffff;
  --ring: #000000;
  /* shadcn additions */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 6px 18px rgba(2, 6, 23, 0.08);
  --shadow-lg: 0 20px 40px rgba(2, 6, 23, 0.12);
  --glass: rgba(255, 255, 255, 0.04);
  --btn-bg: var(--muted);
  --btn-foreground: var(--foreground);
  --card-border: rgba(0, 0, 0, 0.04);
  /* Font stacks */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', system-ui, sans-serif;
  --font-mono: SFMono-Regular, Menlo, Monaco, 'Roboto Mono', 'Noto Mono', 'Droid Sans Mono', monospace;
  /* CJK friendly fallbacks (will be overridden for zh) */
  --font-cjk: 'Noto Sans CJK SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
}

[data-theme="light"] {
  /* Light 模式 */
  --background: #ffffff;
  --foreground: #000000;
  --muted: #f5f5f5;
  --muted-foreground: #737373;
  --border: #e5e5e5;
  --card: #ffffff;
  --card-foreground: #000000;
  --popover: #ffffff;
  --popover-foreground: #000000;
  --primary: #000000;
  --primary-foreground: #ffffff;
  --secondary: #f5f5f5;
  --secondary-foreground: #000000;
  --accent: #f5f5f5;
  --accent-foreground: #000000;
  --destructive: #ef4444;
  --destructive-foreground: #ffffff;
  --ring: #000000;
}

[data-theme="dark"] {
  /* Dark 模式 */
  --background: #000000;
  --foreground: #ffffff;
  --muted: #171717;
  --muted-foreground: #a3a3a3;
  --border: #262626;
  --card: #000000;
  --card-foreground: #ffffff;
  --popover: #000000;
  --popover-foreground: #ffffff;
  --primary: #ffffff;
  --primary-foreground: #000000;
  --secondary: #171717;
  --secondary-foreground: #ffffff;
  --accent: #171717;
  --accent-foreground: #ffffff;
  --destructive: #ef4444;
  --destructive-foreground: #ffffff;
  --ring: #ffffff;
  /* shadcn additions for dark */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow: 0 6px 18px rgba(2, 6, 23, 0.6);
  --shadow-lg: 0 20px 40px rgba(2, 6, 23, 0.7);
  --glass: rgba(255, 255, 255, 0.02);
  --btn-bg: var(--muted);
  --btn-foreground: var(--foreground);
  --card-border: rgba(255, 255, 255, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark 模式 */
    --background: #000000;
    --foreground: #ffffff;
    --muted: #171717;
    --muted-foreground: #a3a3a3;
    --border: #262626;
    --card: #000000;
    --card-foreground: #ffffff;
    --popover: #000000;
    --popover-foreground: #ffffff;
    --primary: #ffffff;
    --primary-foreground: #000000;
    --secondary: #171717;
    --secondary-foreground: #ffffff;
    --accent: #171717;
    --accent-foreground: #ffffff;
    --destructive: #ef4444;
    --destructive-foreground: #ffffff;
    --ring: #ffffff;
  }
}

/* 基础样式 */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: 1.6;
  transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.2s ease;
}

/* 链接样式 */
a {
  color: var(--foreground);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.7;
}

/* 头部 */

header.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, var(--glass));
  gap: 2rem;
}

.site-header__left {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.site-header__right {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  min-width: 0;
}

@media (max-width: 800px) {
  header.site-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 1.25rem 0.5rem;
  }

  .site-header__left,
  .site-header__right {
    align-items: flex-start;
  }

  .site-header__right {
    margin-top: 0.5rem;
    align-items: flex-start;
  }
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.site-description {
  margin: 0.5rem 0 0 0;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

header nav {
  margin: 1rem 0;
}

/* Make .site-nav work without <ul> wrapper */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

header nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

header nav li {
  margin: 0 0.25rem;
}

header nav a {
  display: block;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--foreground);
  transition: transform 0.12s ease, background-color 0.12s ease, opacity 0.12s ease;
}

header nav a:hover {
  text-decoration: none;
  background-color: var(--muted);
  opacity: 1;
}

/* 主题切换按钮 */
.theme-toggle {
  background: none;
  border: 1px solid var(--card-border);
  color: var(--btn-foreground);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.theme-toggle:hover {
  background-color: var(--btn-bg);
  transform: translateY(-1px);
}

/* SVG图标样式 */
.theme-icon {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

/* 主要内容 */
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* 文章列表（模板使用 post-list/post-item） */
.post-list,
.posts {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-item,
.post-preview {
  padding: 1.35rem 1rem;
  border-bottom: 1px solid var(--border);
  display: block;
  gap: 0.5rem;
}

.post-item:last-child,
.post-preview:last-child {
  border-bottom: none;
}

.post-title,
.post-preview h2 {
  margin: 0 0 0.5rem 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.post-meta,
.post-preview .meta {
  margin: 0 0 1rem 0;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.tag-list,
.post-preview .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Tag云样式 */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  background-color: var(--muted);
  color: var(--muted-foreground);
  font-size: 0.95rem;
  border-radius: var(--radius);
  transition: transform 0.12s ease, background-color 0.12s ease;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.tag-cloud-item:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.tag-count {
  font-size: 0.875rem;
  opacity: 0.7;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.5rem;
  background-color: var(--muted);
  color: var(--muted-foreground);
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  transition: transform 0.12s ease, background-color 0.12s ease;
}

.tag:hover {
  background-color: var(--accent);
}

/* 文章详情 */
.post {
  padding: 1rem 0;
  background: transparent;
}

.post h1 {
  margin: 0 0 1rem 0;
  font-size: 2rem;
  font-weight: 700;
}

.post .meta {
  margin: 0 0 2rem 0;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.post .content,
.post-content {
  font-size: 1rem;
  line-height: 1.75;
}

.post .content p,
.post-content p {
  margin: 0 0 1.5rem 0;
}

/* 图片样式 */
.post .content img,
.post-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
  border-radius: 0.5rem;
}

.post .content img+em,
.post-content img+em {
  display: block;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-top: 0.5rem;
}

.post .tags {
  margin: 2rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.pagination a {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.pagination a:hover {
  background-color: var(--muted);
}

.pagination .page-info {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

/* 页脚 */
footer {
  padding: 2rem 1rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  border-top: 1px solid var(--border);
}

/* 代码块样式 */
pre.chroma {
  position: relative;
  background-color: var(--chroma-bg, #f6f8fa); /* Use chroma background or fallback */
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background-color: var(--muted);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
}

/* Language aware font overrides: apply CJK stack when document or elements are Chinese */
/* Prefer document-level html[lang^="zh"] and :lang() for inline language detection */
html[lang^="zh"],
html[lang*="-zh"] {
  --font-sans: var(--font-cjk);
  --font-mono: 'Noto Sans Mono CJK', var(--font-mono);
}

:lang(zh),
:lang(zh-CN),
:lang(zh-TW),
:lang(zh-HK) {
  font-family: var(--font-cjk);
}

/* If you have mixed content where inline spans are in English inside zh pages, keep a readable Latin fallback */
:lang(en) {
  font-family: var(--font-sans);
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* 代码复制按钮 */
.copy-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background-color: var(--btn-bg);
  color: var(--btn-foreground);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-button:hover {
  background-color: var(--accent);
  color: var(--accent-foreground);
  transform: translateY(-1px);
}

.copy-button.copied {
  background-color: var(--primary);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-sm);
}

/* 代码高亮 */
.hljs {
  display: block;
  overflow-x: auto;
  padding: 0.5em;
  background: transparent;
  color: var(--foreground);
}

.hljs-comment,
.hljs-quote {
  color: var(--muted-foreground);
  font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-subst {
  color: var(--primary);
  font-weight: bold;
}

.hljs-number,
.hljs-literal,
.hljs-variable,
.hljs-template-variable,
.hljs-tag .hljs-attr {
  color: #008080;
}

.hljs-string,
.hljs-doctag {
  color: #d14;
}

.hljs-title,
.hljs-section,
.hljs-selector-id {
  color: #900;
  font-weight: bold;
}

.hljs-subst {
  font-weight: normal;
}

.hljs-type,
.hljs-class .hljs-title {
  color: #458;
  font-weight: bold;
}

.hljs-tag,
.hljs-name,
.hljs-attribute {
  color: #000080;
  font-weight: normal;
}

.hljs-regexp,
.hljs-link {
  color: #009926;
}

.hljs-symbol,
.hljs-bullet {
  color: #990073;
}

.hljs-built_in,
.hljs-builtin-name {
  color: #0086b3;
}

.hljs-meta {
  color: #999;
  font-weight: bold;
}

.hljs-deletion {
  background: #fdd;
}

.hljs-addition {
  background: #dfd;
}

.hljs-emphasis {
  font-style: italic;
}

.hljs-strong {
  font-weight: bold;
}

/* 暗黑模式下的代码高亮 */
@media (prefers-color-scheme: dark) {
  .hljs {
    background: transparent;
    color: var(--foreground);
  }

  .hljs-comment,
  .hljs-quote {
    color: var(--muted-foreground);
  }

  .hljs-keyword,
  .hljs-selector-tag,
  .hljs-subst {
    color: var(--primary);
  }

  .hljs-number,
  .hljs-literal,
  .hljs-variable,
  .hljs-template-variable,
  .hljs-tag .hljs-attr {
    color: #6ee7b7;
  }

  .hljs-string,
  .hljs-doctag {
    color: #fca5a5;
  }

  .hljs-title,
  .hljs-section,
  .hljs-selector-id {
    color: #fbbf24;
  }

  .hljs-type,
  .hljs-class .hljs-title {
    color: #93c5fd;
  }

  .hljs-tag,
  .hljs-name,
  .hljs-attribute {
    color: #c7d2fe;
  }

  .hljs-regexp,
  .hljs-link {
    color: #86efac;
  }

  .hljs-symbol,
  .hljs-bullet {
    color: #e879f9;
  }

  .hljs-built_in,
  .hljs-builtin-name {
    color: #a5b4fc;
  }

  .hljs-meta {
    color: var(--muted-foreground);
  }
}

/* Utility: subtle card */
.card {
  background: var(--card);
  color: var(--card-foreground);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

/* Buttons (primary/ghost) */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-radius: calc(var(--radius) - 2px);
  border: 1px solid transparent;
  background: var(--btn-bg);
  color: var(--btn-foreground);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
}

/* small helpers */
.muted {
  color: var(--muted-foreground);
}


/* 响应式设计 */
@media (max-width: 600px) {
  header {
    padding: 1rem;
  }

  header nav ul {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  header nav li {
    margin: 0 0.15rem;
  }

  header nav a {
    padding: 0.15rem 0.35rem;
    white-space: nowrap;
  }
}

@media (min-width: 768px) {
  header {
    padding: 3rem 1rem;
  }

  header h1 {
    font-size: 2rem;
  }

  main {
    padding: 3rem 1rem;
  }

  .post h1 {
    font-size: 2.5rem;
  }
}