/* Minimalist Systems Engineering Theme & Reading Engine */

:root {
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --accent: #58a6ff;
  --accent-alt: #3fb950;
  --border: #30363d;
  --code-bg: #090d13;
  --code-border: #21262d;
  --card-bg: #161b22;
  --tag-bg: #21262d;
  --toast-bg: #238636;
  --toast-fg: #ffffff;
  
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Menlo, Consolas, Monaco, monospace;
  --font-serif: 'Charter', 'Source Serif Pro', 'Merriweather', 'Georgia', serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --active-font: var(--font-mono);
  
  --base-size: 16.5px;
  --base-line-height: 1.65;
  --content-max-width: 780px;
}

/* Theme: Monochrome Slate (Default / Deep Slate) */
.theme-mono {
  --bg: #0d1117;
  --bg-subtle: #161b22;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --accent: #58a6ff;
  --accent-alt: #3fb950;
  --border: #30363d;
  --code-bg: #090d13;
  --code-border: #21262d;
  --card-bg: #161b22;
  --tag-bg: #21262d;
  --toast-bg: #238636;
  --toast-fg: #ffffff;
}

/* Theme: Solarized Dark */
.theme-solarized {
  --bg: #002b36;
  --bg-subtle: #073642;
  --fg: #93a1a1;
  --fg-dim: #839496;
  --accent: #38a5e8;
  --accent-alt: #2aa198;
  --border: #0b4e5f;
  --code-bg: #00212b;
  --code-border: #073642;
  --card-bg: #04303c;
  --tag-bg: #083c4a;
  --toast-bg: #2aa198;
  --toast-fg: #002b36;
}

/* Theme: Paper Light */
.theme-paper {
  --bg: #fafafa;
  --bg-subtle: #f0f3f6;
  --fg: #1f2328;
  --fg-dim: #57606a;
  --accent: #0969da;
  --accent-alt: #1a7f37;
  --border: #d0d7de;
  --code-bg: #f6f8fa;
  --code-border: #e1e4e8;
  --card-bg: #ffffff;
  --tag-bg: #eaeef2;
  --toast-bg: #1a7f37;
  --toast-fg: #ffffff;
}

/* Font Family Classes */
.font-mono { --active-font: var(--font-mono); font-family: var(--font-mono); }
.font-serif { --active-font: var(--font-serif); font-family: var(--font-serif); }
.font-sans { --active-font: var(--font-sans); font-family: var(--font-sans); }

/* Font Size Classes - Dynamic Resizing */
.size-sm {
  --base-size: 14px;
  --base-line-height: 1.5;
  font-size: 14px !important;
  line-height: 1.5 !important;
}

.size-md {
  --base-size: 16.5px;
  --base-line-height: 1.65;
  font-size: 16.5px !important;
  line-height: 1.65 !important;
}

.size-lg {
  --base-size: 20px;
  --base-line-height: 1.8;
  font-size: 20px !important;
  line-height: 1.8 !important;
}

/* Content Width Classes */
.width-compact { --content-max-width: 640px; }
.width-standard { --content-max-width: 780px; }
.width-wide { --content-max-width: 960px; }

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  background-color: var(--bg);
  color: var(--fg);
  font-size: var(--base-size);
  line-height: var(--base-line-height);
  transition: background-color 0.15s ease, color 0.15s ease;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app-root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  color: var(--fg);
  font-family: var(--active-font);
  font-size: var(--base-size);
  line-height: var(--base-line-height);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.1s ease;
}

a:hover {
  text-decoration: underline;
}

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Scroll Progress Bar */
.progress-bar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 1000;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.08s ease-out;
}

/* Reader Toolbar Container & Desktop Layout */
.reader-toolbar,
.reader-toolbar-container {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 100%;
}

.reader-toolbar-desktop {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-dim);
}

.reader-toolbar-mobile {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.mobile-bar-label {
  font-weight: 600;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 11px;
}

.mobile-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  min-height: 36px;
  transition: all 0.15s ease;
}

.mobile-toggle-btn:hover,
.mobile-toggle-btn-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg);
}

.mobile-toggle-btn .toggle-icon {
  font-weight: 800;
  font-size: 13px;
  letter-spacing: -0.5px;
}

/* Mobile Settings Drawer Overlay & Panel */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.mobile-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: fadeIn 0.15s ease-out;
}

.mobile-drawer-panel {
  position: relative;
  z-index: 10001;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-radius: 20px 20px 0 0;
  padding: 20px 20px 36px 20px;
  box-shadow: 0 -12px 36px rgba(0, 0, 0, 0.6);
  max-height: 85vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.drawer-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--fg);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.drawer-close-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.drawer-close-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.drawer-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drawer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.drawer-btn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.drawer-btn {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  font-size: 12.5px;
  font-family: var(--font-mono);
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.drawer-btn:hover {
  border-color: var(--accent);
  color: var(--fg);
}

.drawer-btn-active {
  background: var(--fg) !important;
  color: var(--bg) !important;
  border-color: var(--fg) !important;
  font-weight: 700 !important;
}

.drawer-focus-btn {
  min-height: 48px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer-focus-btn:hover {
  border-color: var(--accent);
}

.drawer-focus-btn-active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 700;
}

.reader-controls-group {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 4px;
}

.controls-label {
  color: var(--fg-dim);
  font-weight: 600;
  font-size: 11px;
  padding: 0 4px;
  text-transform: lowercase;
  user-select: none;
}

.reader-controls-divider {
  color: var(--border);
  margin: 0 4px;
  user-select: none;
  font-weight: 300;
}

.ctrl-btn {
  padding: 3px 8px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--fg-dim);
  font-size: 11.5px;
  font-family: var(--font-mono);
  min-height: 26px;
  min-width: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.12s ease;
}

.ctrl-btn:hover {
  color: var(--fg);
  background: var(--bg-subtle);
  border-color: var(--border);
}

.ctrl-btn-active {
  background: var(--tag-bg);
  color: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  padding: 16px 0;
}

.header-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
}

.site-brand .brand-link {
  font-weight: bold;
  font-size: 1.05em;
  color: var(--fg);
}

.brand-symbol {
  color: var(--accent);
  margin-right: 4px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.nav-item {
  color: var(--fg-dim);
  font-size: 0.9em;
}

.nav-item:hover {
  color: var(--fg);
  text-decoration: none;
}

.nav-item-active {
  color: var(--accent);
  font-weight: bold;
}

.nav-ext {
  color: var(--fg-dim);
  opacity: 0.85;
  font-size: 0.85em;
  transition: all 0.15s ease;
}

.nav-ext:hover {
  color: var(--accent);
  opacity: 1;
}

/* Main Container */
.site-main {
  flex: 1;
  padding: 32px 0 48px;
}

.main-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Breadcrumb */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--fg-dim);
  margin-bottom: 24px;
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 0;
  align-items: center;
}

.breadcrumb-link {
  color: var(--fg-dim);
}

.breadcrumb-link:hover {
  color: var(--accent);
}

.breadcrumb-current {
  color: var(--fg);
}

.breadcrumb-sep {
  color: var(--border);
}

/* Hero Section (Home) */
.hero-section {
  margin-bottom: 40px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 4px;
  padding: 20px 24px;
}

.hero-prompt {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--fg-dim);
  margin-bottom: 12px;
}

.prompt-user { color: var(--accent-alt); }
.prompt-char { color: var(--fg-dim); }
.prompt-cmd { color: var(--fg); font-weight: bold; }

.hero-title {
  font-size: 1.6em;
  color: var(--accent);
  margin-bottom: 4px;
}

.hero-subtitle {
  font-size: 0.92em;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.hero-text {
  font-size: 1em;
  line-height: var(--base-line-height);
  margin-bottom: 20px;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
}

.hero-action-link {
  font-size: 0.85em;
  padding: 4px 8px;
  border: 1px dashed var(--border);
  border-radius: 3px;
}

.hero-action-link:hover {
  border-color: var(--accent);
  background: var(--bg-subtle);
  text-decoration: none;
}

.hero-action-link.hero-ext {
  border-style: solid;
  border-color: var(--border);
  color: var(--accent);
}

.hero-action-link.hero-ext:hover {
  border-color: var(--accent);
  background: var(--card-bg);
}

/* Section Headings */
.home-section {
  margin-bottom: 40px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
  margin-bottom: 20px;
}

.section-title {
  font-size: 1.2em;
  font-weight: bold;
  color: var(--fg);
}

.section-more {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--fg-dim);
}

/* Cards & Lists */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px 20px;
  margin-bottom: 16px;
  transition: border-color 0.1s ease;
}

.card:hover {
  border-color: var(--accent);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78em;
  color: var(--fg-dim);
  margin-bottom: 8px;
}

.meta-sep { color: var(--border); }

.card-title {
  font-size: 1.18em;
  margin-bottom: 6px;
}

.card-link {
  color: var(--fg);
  font-weight: bold;
}

.card-link:hover {
  color: var(--accent);
}

.card-subtitle {
  font-size: 0.9em;
  color: var(--fg-dim);
  margin-bottom: 10px;
}

.card-excerpt {
  font-size: 1em;
  line-height: var(--base-line-height);
  color: var(--fg);
  margin-bottom: 12px;
}

.card-footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.read-more-link {
  font-family: var(--font-mono);
  font-size: 0.82em;
}

/* Compact Note Row */
.notes-compact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.note-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  font-size: 0.9em;
}

.note-row-cat { font-family: var(--font-mono); color: var(--accent-alt); font-size: 0.85em; }
.note-row-link { color: var(--fg); flex: 1; }
.note-row-link:hover { color: var(--accent); }
.note-row-date { font-family: var(--font-mono); color: var(--fg-dim); font-size: 0.8em; }

/* Filter Bar & Search */
.filter-bar {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.search-container {
  display: flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
}

.search-icon {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: bold;
  margin-right: 8px;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-size: 0.92em;
  outline: none;
}

.search-clear {
  color: var(--fg-dim);
  font-size: 1.1em;
  padding: 0 4px;
}

.search-clear:hover { color: var(--fg); }

/* Tabs & Categories */
.category-bar, .status-filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
}

.tab-btn {
  padding: 4px 10px;
  font-size: 0.8em;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-subtle);
  color: var(--fg-dim);
}

.tab-btn:hover { color: var(--fg); border-color: var(--accent); }
.tab-btn-active { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: bold; }

/* Tags */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-chip {
  font-family: var(--font-mono);
  font-size: 0.78em;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--tag-bg);
  color: var(--fg-dim);
}

.tag-chip:hover { border-color: var(--accent); color: var(--accent); }
.tag-chip-active { background: var(--accent-alt); color: #000000; border-color: var(--accent-alt); font-weight: bold; }
.tag-static { background: var(--tag-bg); color: var(--fg-dim); border: 1px solid var(--border); }
.tag-small { font-family: var(--font-mono); font-size: 0.78em; color: var(--fg-dim); margin-right: 8px; }

button.tag-small.tag-btn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  padding: 1px 4px;
  cursor: pointer;
  transition: color 0.1s ease, border-color 0.1s ease, background-color 0.1s ease;
}

button.tag-small.tag-btn:hover {
  color: var(--accent);
  border-color: var(--border);
  background-color: var(--bg-subtle);
}

/* Status Badges */
.status-badge {
  font-family: var(--font-mono);
  font-size: 0.7em;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.status-reading { background: #d2992222; color: #e3b341; border: 1px solid #d2992255; }
.status-finished { background: #3fb95022; color: #3fb950; border: 1px solid #3fb95055; }
.status-backlog { background: #8b949e22; color: #8b949e; border: 1px solid #8b949e55; }

.theme-paper .status-reading { background: #fff8c5; color: #735c0f; border-color: #d4a72c; }
.theme-paper .status-finished { background: #dafbe1; color: #1a7f37; border-color: #4ac26b; }
.theme-paper .status-backlog { background: #f6f8fa; color: #57606a; border-color: #d0d7de; }

.badge-category {
  font-family: var(--font-mono);
  font-size: 0.75em;
  color: var(--accent-alt);
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

.badge-tech {
  font-family: var(--font-mono);
  font-size: 0.75em;
  color: var(--accent);
  background: var(--bg-subtle);
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

/* Article View & TOC */
.article-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.article-title {
  font-size: 1.85em;
  line-height: 1.3;
  margin-bottom: 8px;
  color: var(--fg);
}

.article-subtitle {
  font-size: 1.1em;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--fg-dim);
  margin-bottom: 12px;
}

.toc-container {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 18px;
  margin-bottom: 28px;
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.toc-title {
  font-size: 0.85em;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-item {
  color: var(--fg);
}

.toc-link {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: var(--fg);
  text-align: left;
  cursor: pointer;
  width: 100%;
}

.toc-link:hover {
  color: var(--accent);
}

/* Markdown Body */
.markdown-body {
  font-size: 1em;
  line-height: var(--base-line-height);
  color: var(--fg);
}

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  color: var(--fg);
  margin-top: 2em;
  margin-bottom: 0.8em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  scroll-margin-top: 5rem;
}

[id] {
  scroll-margin-top: 5rem;
}

.markdown-body h1 { font-size: 1.6em; }
.markdown-body h2 { font-size: 1.35em; }
.markdown-body h3 { font-size: 1.15em; }

.heading-anchor {
  margin-left: 8px;
  color: var(--fg-dim);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: 400;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.12s ease;
  user-select: none;
  cursor: pointer;
  display: inline-block;
  vertical-align: baseline;
}

.markdown-body h2:hover .heading-anchor,
.markdown-body h3:hover .heading-anchor,
.markdown-body h4:hover .heading-anchor,
.heading-anchor:focus-visible {
  opacity: 0.6;
}

.heading-anchor:hover {
  opacity: 1 !important;
  color: var(--accent) !important;
  text-decoration: none;
}

.heading-anchor.anchor-copied {
  opacity: 1 !important;
  color: var(--accent) !important;
}

.heading-anchor.anchor-copied::after {
  content: " copied!";
  font-size: 0.72em;
  color: var(--accent);
  font-weight: 600;
}

.markdown-body p {
  margin-bottom: 1.2em;
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1.2em;
  padding-left: 24px;
}

.markdown-body li {
  margin-bottom: 0.4em;
}

.markdown-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  margin: 1.2em 0;
  color: var(--fg-dim);
  font-style: italic;
}

/* GitHub-style Markdown Alerts */
.markdown-body blockquote.markdown-alert {
  padding: 14px 18px;
  margin: 1.4em 0;
  color: var(--fg);
  border-left: 4px solid var(--accent);
  background: var(--card-bg);
  border-radius: 6px;
  font-style: normal !important;
}

.markdown-body blockquote.markdown-alert p {
  font-style: normal !important;
  color: var(--fg);
  margin-bottom: 0.6em;
}

.markdown-body blockquote.markdown-alert p:last-child {
  margin-bottom: 0;
}

.markdown-alert-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.82em;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

.markdown-alert-note {
  border-left-color: #58a6ff !important;
  background: rgba(56, 139, 253, 0.08) !important;
}
.markdown-alert-note .markdown-alert-title {
  color: #58a6ff;
}

.markdown-alert-tip {
  border-left-color: #3fb950 !important;
  background: rgba(63, 185, 80, 0.08) !important;
}
.markdown-alert-tip .markdown-alert-title {
  color: #3fb950;
}

.markdown-alert-important {
  border-left-color: #a371f7 !important;
  background: rgba(163, 113, 247, 0.08) !important;
}
.markdown-alert-important .markdown-alert-title {
  color: #a371f7;
}

.markdown-alert-warning {
  border-left-color: #d29922 !important;
  background: rgba(210, 153, 34, 0.08) !important;
}
.markdown-alert-warning .markdown-alert-title {
  color: #d29922;
}

.markdown-alert-caution {
  border-left-color: #f85149 !important;
  background: rgba(248, 81, 73, 0.08) !important;
}
.markdown-alert-caution .markdown-alert-title {
  color: #f85149;
}

.markdown-body table {
  display: block;
  width: 100%;
  margin: 1.4em 0;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 0.9em;
}

.markdown-body th,
.markdown-body td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.markdown-body th {
  background: var(--bg-subtle);
  color: var(--fg);
}

.markdown-body pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 14px 18px;
  margin: 1.4em 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88em;
  line-height: 1.5;
}

.markdown-body code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 2px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.markdown-body pre code {
  background: transparent;
  border: none;
  padding: 0;
}

/* Buttons */
.copy-btn {
  font-family: var(--font-mono);
  font-size: 0.78em;
  color: var(--accent);
}

.copy-btn:hover { text-decoration: underline; }

.btn-inline {
  font-family: var(--font-mono);
  font-size: 0.8em;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-subtle);
  color: var(--fg);
}

.btn-inline:hover { border-color: var(--accent); }

.btn-link {
  font-family: var(--font-mono);
  font-size: 0.85em;
  display: inline-block;
  margin-top: 24px;
}

/* Code Block Copy Button (Top Right) */
.markdown-body pre {
  position: relative;
}

.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 10px;
  left: auto;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--fg-dim);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.12s ease, border-color 0.12s ease;
  user-select: none;
  z-index: 10;
}

.markdown-body pre:hover .code-copy-btn,
.code-copy-btn:focus-visible {
  opacity: 1;
}

.code-copy-btn:hover {
  color: var(--fg);
  border-color: var(--accent);
  background: var(--bg);
}

.code-copy-btn.code-copied {
  opacity: 1 !important;
  color: var(--accent) !important;
  border-color: var(--accent) !important;
  background: var(--tag-bg) !important;
  font-weight: 700;
}

@media (hover: none) {
  .code-copy-btn {
    opacity: 0.85;
  }
}

/* Article Project Card (End of Article) */
.article-project-card {
  margin-top: 36px;
  padding: 18px 20px;
}

/* Homepage Featured Projects */
.project-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.home-project-card {
  display: flex;
  flex-direction: column;
  padding: 18px 20px;
}

.project-highlights-list {
  margin: 10px 0 0 0;
  padding-left: 18px;
  font-size: 0.82em;
  color: var(--fg-dim);
  line-height: 1.5;
}

.highlight-item {
  margin-bottom: 4px;
}

/* CV View */
.cv-header {
  border: 1px solid var(--border);
  background: var(--card-bg);
  border-radius: 4px;
  padding: 24px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.cv-name {
  font-size: 1.7em;
  color: var(--fg);
  margin-bottom: 4px;
}

.cv-title {
  font-size: 1em;
  color: var(--accent);
  margin-bottom: 8px;
}

.cv-meta {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--fg-dim);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cv-summary {
  font-size: 1em;
  line-height: var(--base-line-height);
}

.btn-download-cv {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-weight: bold;
  font-size: 0.85em;
  border-radius: 4px;
  white-space: nowrap;
}

.btn-download-cv:hover {
  text-decoration: none;
  opacity: 0.9;
}

.project-header-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.project-name {
  font-size: 1.18em;
}

.project-desc {
  font-size: 0.95em;
  margin-bottom: 12px;
}

.project-highlights-list {
  padding-left: 20px;
  font-size: 0.88em;
  color: var(--fg-dim);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cv-section {
  margin-bottom: 36px;
}

.cv-experience-list,
.cv-projects-list,
.cv-education-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cv-entry-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cv-entry-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.cv-entry-title {
  font-size: 1.15em;
  color: var(--fg);
  margin-bottom: 2px;
}

.cv-entry-subtitle {
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--fg-dim);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.cv-entry-org {
  color: var(--accent);
  font-weight: 500;
}

.cv-entry-tech {
  margin-top: 4px;
}

.cv-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.cv-skill-card {
  padding: 16px;
}

.cv-skill-title {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 4px;
}

.cv-skill-items {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88em;
  color: var(--fg-dim);
}

.cv-skill-item::before {
  content: "• ";
  color: var(--accent-alt);
}

.cv-awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.cv-award-card {
  padding: 16px;
}

.cv-award-title {
  font-size: 1.05em;
  color: var(--fg);
  margin-bottom: 4px;
}

.cv-award-subtitle {
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: var(--accent);
  margin-bottom: 8px;
}

.cv-award-desc {
  font-size: 0.88em;
  color: var(--fg-dim);
  line-height: 1.45;
}

/* Related Notes */
.related-notes-section {
  margin-top: 36px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.related-notes-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9em;
}

.related-note-item {
  color: var(--fg);
  padding: 6px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.related-note-item:hover { border-color: var(--accent); text-decoration: none; }
.rel-symbol { font-family: var(--font-mono); color: var(--accent); }
.rel-title { flex: 1; }
.rel-cat { font-family: var(--font-mono); color: var(--fg-dim); font-size: 0.8em; }

/* Book Card */
.book-meta-primary {
  display: flex;
  align-items: center;
  gap: 10px;
}

.book-year {
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: var(--fg-dim);
}

.book-rating {
  font-family: var(--font-mono);
  color: #ffb000;
  font-size: 0.9em;
}

.book-title {
  font-size: 1.18em;
  margin-bottom: 4px;
}

.book-author {
  font-size: 0.85em;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

.book-notes {
  font-size: 0.95em;
  margin-bottom: 12px;
  line-height: var(--base-line-height);
}

.takeaways-block {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 0.88em;
}

.takeaways-heading {
  font-family: var(--font-mono);
  font-size: 0.8em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 6px;
}

.takeaways-list {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Toast */
.notification-toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--toast-bg);
  color: var(--toast-fg);
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: bold;
  padding: 8px 16px;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  z-index: 2000;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.8em;
}

.footer-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dim { color: var(--fg-dim); }

.footer-left {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.footer-link {
  color: var(--fg-dim);
  transition: color 0.12s ease;
}

.footer-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Focus Mode */
.focus-mode .site-header,
.focus-mode .site-footer,
.focus-mode .breadcrumb,
.focus-mode .filter-bar,
.focus-mode .reader-controls-divider,
.focus-mode .controls-label {
  display: none !important;
}

.focus-mode .reader-toolbar {
  background: transparent;
  border-bottom: none;
  opacity: 0.2;
  transition: opacity 0.2s ease;
}

.focus-mode .reader-toolbar:hover {
  opacity: 1;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 3000;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
}

.modal-box {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 90%;
  max-width: 520px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  z-index: 3001;
  font-family: var(--font-mono);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.modal-title { font-size: 1.1em; color: var(--fg); }
.modal-close-btn { font-size: 1.1em; color: var(--fg-dim); }
.modal-close-btn:hover { color: var(--accent); }

.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.85em;
}

.shortcuts-table th, .shortcuts-table td {
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.shortcuts-table th { color: var(--fg-dim); font-size: 0.75em; text-transform: uppercase; }

kbd {
  font-family: var(--font-mono);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--accent);
  font-size: 0.8em;
}

.modal-note {
  font-size: 0.8em;
  color: var(--fg-dim);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  border: 1px dashed var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
}

.empty-text {
  color: var(--fg-dim);
  margin-bottom: 16px;
}

/* Print Stylesheet */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
  }
  .progress-bar-container,
  .reader-toolbar,
  .site-header,
  .site-footer,
  .btn-download-cv,
  .notification-toast,
  .modal-overlay {
    display: none !important;
  }
  .cv-view, .card {
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
  }
  a {
    color: #000000 !important;
    text-decoration: none !important;
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .reader-toolbar-desktop {
    display: none;
  }
  .reader-toolbar-mobile {
    display: flex;
  }
}

@media (max-width: 640px) {
  .header-inner { flex-direction: column; gap: 12px; align-items: flex-start; }
  .cv-header { flex-direction: column; }
  .article-title { font-size: 1.5em; }
}

/* Syntax Highlighting (highlight.js tokens, themed per reader theme) */
:root {
  --syn-keyword: #f5f5f5;
  --syn-fn: #ffffff;
  --syn-string: #c9c9c9;
  --syn-number: #b4b4b4;
  --syn-comment: #7a7a7a;
}

.theme-solarized {
  --syn-keyword: #268bd2;
  --syn-fn: #b58900;
  --syn-string: #2aa198;
  --syn-number: #d33682;
  --syn-comment: #586e75;
}

.theme-paper {
  --syn-keyword: #cf222e;
  --syn-fn: #8250df;
  --syn-string: #0a3069;
  --syn-number: #0550ae;
  --syn-comment: #6e7781;
}

.markdown-body .hljs-keyword,
.markdown-body .hljs-selector-tag,
.markdown-body .hljs-literal,
.markdown-body .hljs-section,
.markdown-body .hljs-doctag,
.markdown-body .hljs-type,
.markdown-body .hljs-name,
.markdown-body .hljs-strong {
  color: var(--syn-keyword);
  font-weight: 600;
}

.markdown-body .hljs-title,
.markdown-body .hljs-title.function_,
.markdown-body .hljs-title.class_,
.markdown-body .hljs-built_in {
  color: var(--syn-fn);
}

.markdown-body .hljs-string,
.markdown-body .hljs-attr,
.markdown-body .hljs-attribute,
.markdown-body .hljs-addition,
.markdown-body .hljs-template-variable,
.markdown-body .hljs-variable {
  color: var(--syn-string);
}

.markdown-body .hljs-number,
.markdown-body .hljs-symbol,
.markdown-body .hljs-bullet,
.markdown-body .hljs-meta,
.markdown-body .hljs-link {
  color: var(--syn-number);
}

.markdown-body .hljs-comment,
.markdown-body .hljs-quote,
.markdown-body .hljs-deletion {
  color: var(--syn-comment);
  font-style: italic;
}

/* Mermaid Diagrams */
.markdown-body .mermaid-host {
  display: flex;
  justify-content: center;
  padding: 16px;
  overflow-x: auto;
}

.markdown-body .mermaid-host svg {
  max-width: 100%;
  height: auto;
}

.markdown-body .mermaid-error {
  display: block;
  justify-content: flex-start;
  white-space: pre-wrap;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  font-size: 0.85em;
}