/* ===== Google Fonts: Inter + Fira Code ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Fira+Code:wght@400;500&display=swap');

/* ===== 设计令牌（浅色模式） ===== */
:root {
  --bg: #f8f9fa;
  --paper: #ffffff;
  --text: #212529;
  --muted: #6c757d;
  --line: #dee2e6;
  --accent: #003f87;
  --accent-soft: #e7f1ff;
  --accent-hover: #0d6efd;
  --max: 860px;
  --code-bg: #f6f8fa;
  --code-text: #24292e;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Fira Code", "JetBrains Mono", "Cascadia Code", monospace;
  --radius: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

/* ===== 深色模式（WCAG AA 合规） ===== */
html.dark {
  --bg: #0f1419;
  --paper: #1a1f26;
  --text: #e9ecef;
  --muted: #adb5bd;
  --line: #2a3038;
  --accent: #5b9bd5;
  --accent-soft: #13233f;
  --accent-hover: #7eb8f0;
  --code-bg: #161b22;
  --code-text: #e6edf3;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.6);
}


/* ===== 基础排版 ===== */
html, body {
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.003em;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  letter-spacing: -0.015em;
  font-weight: 600;
  color: var(--text);
}


/* ===== 导航栏 ===== */
.navbar {
  border-bottom: 1px solid var(--line);
  background: var(--bg) !important;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text) !important;
  font-family: var(--font-sans);
}

.navbar .nav-link {
  color: var(--text) !important;
  opacity: 0.82;
  font-weight: 500;
  font-size: 0.95rem;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--accent) !important;
  opacity: 1;
}

html.dark .navbar .nav-link {
  color: var(--text) !important;
  opacity: 0.82;
}

html.dark .navbar .nav-link:hover {
  color: var(--accent) !important;
}


/* ===== 行内代码 ===== */
code:not(pre code) {
  background: var(--accent-soft);
  border: none;
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.875em;
  font-family: var(--font-mono);
  color: var(--accent);
  font-feature-settings: "liga" 1;
}


/* ===== 页面布局 ===== */
#quarto-content {
  position: relative;
}

main.content {
  color: var(--text);
  min-height: calc(100vh - 64px);
}

/* 内容区文字 */
main.content h1,
main.content h2,
main.content h3,
main.content h4,
main.content h5,
main.content h6,
main.content p,
main.content li,
main.content blockquote {
  color: var(--text) !important;
}

main.content .muted,
main.content .text-muted {
  color: var(--muted);
}

main.content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 30%, transparent);
  text-underline-offset: 2px;
  transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

main.content a:hover {
  color: var(--accent-hover);
  text-decoration-color: var(--accent-hover);
}

main.content hr {
  border-color: var(--line);
}

main.content ::selection {
  background: var(--accent);
  color: #fff;
}


/* ===== 标题块 ===== */
#title-block-header {
  margin-bottom: 1.5rem;
}

.quarto-title h1,
main.content h1.title {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}


/* ===== Home 页面 ===== */
.home-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

.home-photo-col {
  display: flex;
  justify-content: center;
}

.home-photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 700;
  font-family: var(--font-sans);
  box-shadow: var(--shadow-md);
}

.home-intro-col .home-name {
  font-size: 2.4rem !important;
  font-weight: 700;
  margin: 0 0 0.3rem !important;
  color: var(--text) !important;
  letter-spacing: -0.02em;
}

.home-tagline {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.5rem;
  font-weight: 500;
}

.home-section-title {
  font-size: 1.2rem !important;
  font-weight: 600;
  margin-top: 1.2rem !important;
  margin-bottom: 0.5rem !important;
  color: var(--text) !important;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.3rem;
}

.home-intro-col ul {
  list-style: none;
  padding-left: 0;
}

.home-intro-col ul li {
  padding: 0.2rem 0;
  color: var(--text);
}

.home-intro-col ul li strong {
  color: var(--accent);
  font-weight: 600;
}

.home-intro-col a {
  color: var(--accent);
  text-decoration: none;
}

.home-intro-col a:hover {
  text-decoration: underline;
}


/* ===== Quarto Listing 列表页 ===== */
.quarto-listing {
  margin-top: 1rem;
}

/* 博客条目 */
.quarto-listing .quarto-post {
  padding: 1.2rem 0;
  margin: 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  transition: background-color 0.2s ease;
}

.quarto-listing .quarto-post:hover {
  background: var(--accent-soft);
}

.quarto-listing .quarto-post .body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.quarto-listing .quarto-post .listing-title {
  margin: 0 !important;
  font-size: 1.1rem;
  font-weight: 600;
}

.quarto-listing .quarto-post .listing-title a {
  color: var(--text) !important;
  text-decoration: none;
  transition: color 0.2s ease;
}

.quarto-listing .quarto-post .listing-title a:hover {
  color: var(--accent) !important;
}

.quarto-listing .quarto-post .listing-description {
  color: var(--muted) !important;
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.55;
}

.quarto-listing .quarto-post .metadata {
  font-size: 0.85rem;
  color: var(--muted) !important;
  font-weight: 500;
}

.quarto-listing .quarto-post .listing-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.3rem;
}

.quarto-listing .quarto-post .listing-categories .listing-category {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  font-size: 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 4px;
  font-weight: 500;
  text-decoration: none;
}

/* 年份分组标题 */
.quarto-listing h2,
.quarto-listing .listing-year {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--accent-soft);
}


/* ===== 侧边栏（Quarto margin-sidebar） ===== */
.margin-sidebar,
#quarto-margin-sidebar {
  font-size: 0.875rem;
  color: var(--muted);
}

#quarto-margin-sidebar .toc-actions,
#quarto-margin-sidebar .quarto-listing-category,
#quarto-margin-sidebar .quarto-listing-filter {
  margin-bottom: 1.5rem;
}

#quarto-margin-sidebar h2,
#quarto-margin-sidebar h3,
#quarto-margin-sidebar .quarto-listing-category-title,
#quarto-margin-sidebar .listing-category-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.4rem;
  margin-bottom: 0.6rem;
}

/* 分类筛选按钮 */
#quarto-margin-sidebar .quarto-listing-category .category,
.margin-sidebar .quarto-listing-category .category {
  display: block;
  padding: 0.3rem 0.5rem;
  color: var(--text);
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: all 0.2s ease;
  cursor: pointer;
}

#quarto-margin-sidebar .quarto-listing-category .category:hover,
.margin-sidebar .quarto-listing-category .category:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

#quarto-margin-sidebar .quarto-listing-category .category.active,
.margin-sidebar .quarto-listing-category .category.active {
  background: var(--accent);
  color: #fff;
}

#quarto-margin-sidebar .quarto-listing-category .category .quarto-category-count {
  opacity: 0.6;
  font-size: 0.85em;
}

/* TOC 链接（年份） */
#quarto-margin-sidebar nav#TOC ul,
#quarto-margin-sidebar .toc ul {
  list-style: none;
  padding-left: 0;
}

#quarto-margin-sidebar nav#TOC a,
#quarto-margin-sidebar .toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  display: block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}

#quarto-margin-sidebar nav#TOC a:hover,
#quarto-margin-sidebar .toc a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}


/* ===== 代码块（GitHub 风格） ===== */
.cell {
  margin: 1.5rem 0;
}

div.sourceCode {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--code-bg);
  color: var(--code-text);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

div.sourceCode *,
div.sourceCode code,
div.sourceCode pre,
pre.sourceCode,
pre.sourceCode code {
  color: var(--code-text) !important;
  font-family: var(--font-mono) !important;
}

pre.sourceCode {
  padding: 1rem 1.1rem;
  font-size: 14px;
  line-height: 1.6;
}

.cell-output-display,
.cell-output-stdout {
  margin-top: 0.8rem;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text) !important;
}

html.dark .cell-output-display,
html.dark .cell-output-stdout,
html.dark .cell-output-display *,
html.dark .cell-output-stdout * {
  color: var(--text) !important;
}


/* ===== 表格 ===== */
table {
  border-collapse: collapse;
  font-size: 0.95rem;
}

table th {
  background: var(--paper);
  font-weight: 600;
}

table th, table td {
  border-color: var(--line);
  padding: 0.6rem 0.8rem;
}

main.content table {
  color: var(--text);
}


/* ===== 全局过渡 ===== */
body, a, button {
  transition: color 0.2s ease, background-color 0.3s ease;
}


/* ===== 主题切换按钮 ===== */
#theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  margin-left: 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--text);
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none !important;
}

#theme-toggle:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

#theme-toggle::before {
  content: "";
  display: block;
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='5'/%3E%3Cline x1='12' y1='1' x2='12' y2='3'/%3E%3Cline x1='12' y1='21' x2='12' y2='23'/%3E%3Cline x1='4.22' y1='4.22' x2='5.64' y2='5.64'/%3E%3Cline x1='18.36' y1='18.36' x2='19.78' y2='19.78'/%3E%3Cline x1='1' y1='12' x2='3' y2='12'/%3E%3Cline x1='21' y1='12' x2='23' y2='12'/%3E%3Cline x1='4.22' y1='19.78' x2='5.64' y2='18.36'/%3E%3Cline x1='18.36' y1='5.64' x2='19.78' y2='4.22'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

html.dark #theme-toggle::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'/%3E%3C/svg%3E");
}


/* ===== 页脚 ===== */
.nav-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
}

.nav-footer .nav-footer-left,
.nav-footer .nav-footer-center,
.nav-footer .nav-footer-right {
  font-size: 0.875rem;
  color: var(--muted);
}

.nav-footer a {
  color: var(--accent);
  text-decoration: none;
}

.nav-footer a:hover {
  text-decoration: underline;
}


/* ===== 引用块、列表、图片 ===== */
main.content blockquote {
  border-left: 3px solid var(--accent);
  background: var(--paper);
  color: var(--text);
  opacity: 0.95;
  padding: 0.8rem 1.2rem;
  margin: 1.2rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

main.content ul, main.content ol {
  padding-left: 1.5rem;
}

main.content li {
  color: var(--text);
  margin-bottom: 0.4rem;
}

main.content img {
  max-width: 100%;
  border-radius: var(--radius);
}

main.content hr {
  margin: 2rem 0;
}


/* ===== 搜索弹窗 ===== */
.quarto-search-modal {
  background: var(--paper) !important;
  color: var(--text);
  border: 1px solid var(--line);
}

.quarto-search-modal input {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line);
  font-family: var(--font-sans);
}


/* ===== 无结果提示 ===== */
.listing-no-matching {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-style: italic;
}

.listing-no-matching.d-none {
  display: none;
}


/* ===== 手机端响应式 ===== */
@media (max-width: 760px) {
  main.content {
    padding: 1rem 1rem 3rem;
  }

  .home-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
    padding: 1.5rem 1rem;
  }

  .home-photo-placeholder {
    width: 150px;
    height: 150px;
    font-size: 3rem;
    margin: 0 auto;
  }

  .home-intro-col .home-name {
    font-size: 1.8rem !important;
  }

  .home-intro-col ul {
    text-align: left;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }
}


/* ===== 深色模式全面优化 ===== */
html.dark main.content h1,
html.dark main.content h2,
html.dark main.content h3,
html.dark main.content h4,
html.dark main.content h5,
html.dark main.content h6 {
  color: var(--text) !important;
}

html.dark main.content p,
html.dark main.content li,
html.dark main.content span,
html.dark main.content div,
html.dark main.content label {
  color: var(--text) !important;
}

html.dark select,
html.dark input[type="text"],
html.dark input[type="search"] {
  background: var(--paper) !important;
  color: var(--text) !important;
  border-color: var(--line) !important;
}

html.dark .btn,
html.dark button {
  background: var(--accent);
  color: #0f1419 !important;
  border-color: var(--accent);
  font-weight: 600;
}

html.dark main.content .quarto-title h1 {
  color: var(--text) !important;
}

html.dark main.content .listing-title,
html.dark main.content .listing-title a {
  color: var(--text) !important;
}

html.dark main.content .listing-description {
  color: var(--muted) !important;
}

html.dark main.content .metadata {
  color: var(--muted) !important;
}

html.dark main.content table,
html.dark main.content table tr,
html.dark main.content table td,
html.dark main.content table th {
  color: var(--text) !important;
  background-color: var(--paper) !important;
  border-color: var(--line) !important;
}

html.dark div.sourceCode,
html.dark pre.sourceCode {
  background-color: var(--code-bg) !important;
  color: var(--code-text) !important;
}

html.dark .cell-output-display,
html.dark .cell-output-stdout,
html.dark .cell-output-text {
  color: var(--text) !important;
}

html.dark main.content ul li::marker,
html.dark main.content ol li::marker {
  color: var(--accent);
}

html.dark main.content blockquote {
  background: var(--paper);
  color: var(--text);
  border-left-color: var(--accent);
}

html.dark .home-photo-placeholder {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
}

html.dark .home-intro-col .home-name {
  color: var(--text) !important;
}

html.dark .home-tagline {
  color: var(--muted);
}

html.dark .home-section-title {
  color: var(--text) !important;
  border-bottom-color: var(--line);
}

html.dark .quarto-listing h2,
html.dark .quarto-listing .listing-year {
  color: var(--text);
  border-bottom-color: var(--accent-soft);
}

html.dark .quarto-listing .quarto-post {
  background: transparent;
  border-bottom-color: var(--line);
}

html.dark .quarto-listing .quarto-post:hover {
  background: var(--accent-soft);
}

html.dark .quarto-listing .quarto-post .listing-title a {
  color: var(--text);
}

html.dark .quarto-listing .quarto-post .listing-categories .listing-category {
  background: var(--accent-soft);
  color: var(--accent);
}

/* 深色模式侧边栏 */
html.dark #quarto-margin-sidebar,
html.dark .margin-sidebar {
  color: var(--muted);
}

html.dark #quarto-margin-sidebar h2,
html.dark #quarto-margin-sidebar h3,
html.dark #quarto-margin-sidebar .quarto-listing-category-title {
  color: var(--muted);
  border-bottom-color: var(--line);
}

html.dark #quarto-margin-sidebar .quarto-listing-category .category,
html.dark .margin-sidebar .quarto-listing-category .category {
  color: var(--text);
}

html.dark #quarto-margin-sidebar .quarto-listing-category .category:hover,
html.dark .margin-sidebar .quarto-listing-category .category:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

html.dark #quarto-margin-sidebar .quarto-listing-category .category.active,
html.dark .margin-sidebar .quarto-listing-category .category.active {
  background: var(--accent);
  color: #0f1419;
}

html.dark #quarto-margin-sidebar nav#TOC a,
html.dark #quarto-margin-sidebar .toc a {
  color: var(--muted);
}

html.dark #quarto-margin-sidebar nav#TOC a:hover,
html.dark #quarto-margin-sidebar .toc a:hover {
  color: var(--accent);
  background: var(--accent-soft);
}


/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ===== 分类输入器（详情页，保留选择器供 category-enhancer 使用） ===== */
.page-category-selector {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.page-category-selector .label {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
  font-family: var(--font-sans);
}

.page-category-selector .current-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  min-height: 28px;
}

.page-category-selector .current-categories .cat-tag {
  padding: 0.25rem 0.6rem;
  background: var(--accent-soft);
  border: 1px solid transparent;
  color: var(--accent);
  font-size: 0.8rem;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s ease;
  font-weight: 500;
}

.page-category-selector .current-categories .cat-tag:hover {
  border-color: var(--accent);
}

.page-category-selector .current-categories .cat-tag .remove {
  cursor: pointer;
  opacity: 0.6;
  font-size: 0.9rem;
  line-height: 1;
  padding: 0 2px;
  border-radius: 3px;
  transition: all 0.15s ease;
}

.page-category-selector .current-categories .cat-tag .remove:hover {
  opacity: 1;
  color: #e53935;
  background: rgba(229, 57, 53, 0.1);
}

.page-category-selector .empty-hint {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

.category-input-wrapper {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.category-input {
  flex: 1;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  transition: all 0.2s ease;
  outline: none;
  font-family: var(--font-sans);
}

.category-input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.category-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

.category-input.input-error {
  border-color: #e53935;
  box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.15);
}

.submit-category {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  font-family: var(--font-sans);
  font-weight: 600;
}

.submit-category:hover {
  filter: brightness(1.08);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 30%, transparent);
}

html.dark .submit-category {
  color: #0f1419 !important;
}

.category-error {
  font-size: 0.82rem;
  color: #e53935;
  padding: 0.3rem 0.5rem;
  background: rgba(229, 57, 53, 0.08);
  border-radius: 4px;
  border-left: 3px solid #e53935;
}

@media (max-width: 760px) {
  .page-category-selector {
    padding: 0.85rem 1rem;
    gap: 0.6rem;
  }
  .category-input-wrapper {
    flex-direction: column;
  }
  .submit-category {
    justify-content: center;
  }
}