@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Lora:ital,wght@0,400;0,600;1,400&display=swap');

/* ===== RESET ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===== THEME — DARK (default) ===== */
:root[data-theme="dark"] {
  --bg-primary: #0f1117;
  --bg-secondary: #161b22;
  --bg-sidebar: #13161d;
  --bg-hover: #1f2430;
  --border: #21262d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  --accent: #58a6ff;
  --accent-green: #3fb950;
  --tag-bg: #1f2a3a;
  --tag-text: #79c0ff;
  --code-bg: #161b22;
  --search-bg: #21262d;
  --scrollbar: #30363d;
}

/* ===== THEME — LIGHT ===== */
:root[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-sidebar: #f0f2f5;
  --bg-hover: #e8ecf0;
  --border: #d0d7de;
  --text-primary: #1f2328;
  --text-secondary: #57606a;
  --text-muted: #9198a1;
  --accent: #0969da;
  --accent-green: #1a7f37;
  --tag-bg: #ddf4ff;
  --tag-text: #0969da;
  --code-bg: #f6f8fa;
  --search-bg: #ffffff;
  --scrollbar: #d0d7de;
}

/* ===== BASE ===== */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Lora', Georgia, serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 200ms ease, color 200ms ease;
  overflow: hidden;
  height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ===== LAYOUT ===== */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* --- Header --- */
.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 100;
  transition: background 200ms ease;
}

.header-logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  white-space: nowrap;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.search-wrapper {
  flex: 1;
  max-width: 520px;
  position: relative;
}

.search-wrapper input {
  width: 100%;
  padding: 8px 14px 8px 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--search-bg);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 200ms ease, background 200ms ease;
}
.search-wrapper input:focus {
  border-color: var(--accent);
}
.search-wrapper .search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-vault-filter {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--search-bg);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  transition: color 200ms ease, border-color 200ms ease;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --- Main body --- */
.main-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* --- Sidebar --- */
.sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background 200ms ease;
}

.sidebar-tree {
  flex: 1;
  overflow-y: auto;
  padding: 12px 0;
}

.sidebar-tree::-webkit-scrollbar {
  width: 6px;
}
.sidebar-tree::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 3px;
}

.sidebar-section-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 8px 16px 4px;
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 0;
  transition: background 120ms ease, color 120ms ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.tree-item.active {
  background: var(--bg-hover);
  color: var(--accent);
}

.tree-item .icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-muted);
}
.tree-item.active .icon {
  color: var(--accent);
}
.tree-item.vault-item .icon {
  color: var(--accent-green);
}

.tree-children {
  padding-left: 16px;
}

.tree-children.collapsed {
  display: none;
}

/* --- Tag Cloud --- */
.tag-cloud-section {
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  max-height: 180px;
  overflow-y: auto;
}
.tag-cloud-section::-webkit-scrollbar {
  width: 6px;
}
.tag-cloud-section::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 3px;
}

.tag-cloud-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

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

.tag-item {
  display: inline-block;
  padding: 2px 8px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  cursor: pointer;
  transition: opacity 150ms ease;
  line-height: 1.4;
}
.tag-item:hover {
  opacity: 0.8;
}

/* --- Content Area --- */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 28px 40px 60px;
  transition: background 200ms ease;
}
.content-area::-webkit-scrollbar {
  width: 8px;
}
.content-area::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 4px;
}

/* Welcome */
.welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  text-align: center;
  gap: 12px;
}
.welcome h2 {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  color: var(--text-secondary);
}
.welcome p {
  font-size: 0.95rem;
  max-width: 400px;
}

/* Breadcrumb */
.breadcrumb {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}
.breadcrumb span {
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 120ms ease;
}
.breadcrumb span:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  cursor: default;
  color: var(--text-muted);
}
.breadcrumb .sep:hover {
  color: var(--text-muted);
}

/* File header */
.file-header {
  margin-bottom: 20px;
}
.file-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.file-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}
.file-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  cursor: pointer;
}
.file-actions {
  margin-top: 8px;
}
.btn-copy-path {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease;
}
.btn-copy-path:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Frontmatter collapsible */
.frontmatter-toggle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 12px;
  user-select: none;
}
.frontmatter-toggle:hover {
  color: var(--text-secondary);
}
.frontmatter-content {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  display: none;
}
.frontmatter-content.open {
  display: block;
}

/* --- Markdown Rendered Content --- */
.md-content h1, .md-content h2, .md-content h3,
.md-content h4, .md-content h5, .md-content h6 {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  margin: 1.4em 0 0.5em;
  color: var(--text-primary);
}
.md-content h1 { font-size: 1.5rem; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-content h2 { font-size: 1.25rem; }
.md-content h3 { font-size: 1.1rem; }

.md-content p {
  margin: 0.6em 0;
}

.md-content ul, .md-content ol {
  padding-left: 1.6em;
  margin: 0.5em 0;
}

.md-content li {
  margin: 0.25em 0;
}

.md-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 16px;
  margin: 0.8em 0;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: 0 6px 6px 0;
}

.md-content code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  border: 1px solid var(--border);
}

.md-content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 0.8em 0;
}
.md-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.85rem;
  line-height: 1.55;
}

.md-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.8em 0;
  font-size: 0.92rem;
}
.md-content th, .md-content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.md-content th {
  background: var(--bg-secondary);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 0.85rem;
}

.md-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 0.6em 0;
}

.md-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5em 0;
}

.md-content .task-list-item {
  list-style: none;
  margin-left: -1.2em;
}
.md-content .task-list-item input[type="checkbox"] {
  margin-right: 6px;
}

/* Wikilinks */
.wikilink {
  color: var(--accent);
  border-bottom: 1px dashed var(--accent);
  cursor: pointer;
}
.wikilink:hover {
  opacity: 0.8;
}
.wikilink-missing {
  color: var(--text-muted);
  border-bottom: 1px dashed var(--text-muted);
  cursor: default;
}

/* --- Search Results --- */
.search-results {
  padding: 0;
}
.search-results-header {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.search-result-item {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}
.search-result-item:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
}

.search-result-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.search-result-vault {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent-green);
  margin-bottom: 4px;
}

.search-result-snippet {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.search-result-tags {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.search-result-tags .file-tag {
  font-size: 0.7rem;
  padding: 1px 6px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .sidebar {
    width: 220px;
    min-width: 220px;
  }
  .content-area {
    padding: 20px;
  }
}

@media (max-width: 600px) {
  .sidebar {
    display: none;
  }
  .content-area {
    padding: 16px;
  }
}