/* ===================================================================
   Pagemark Forest Theme
   Warm greens, earthy tones, natural feel
   =================================================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-bg: #f5f2ed;
  --color-bg-secondary: #ece8e1;
  --color-bg-tertiary: #e2ddd4;
  --color-text: #2d3128;
  --color-text-secondary: #555e4e;
  --color-text-muted: #8a9080;
  --color-border: #d0cbc2;
  --color-border-light: #ddd8cf;
  --color-primary: #3d7a4a;
  --color-primary-light: #dceede;
  --color-primary-dark: #2d5e38;
  --color-accent: #5a9a3e;
  --color-code-bg: #eae6df;
  --color-code-border: #d0cbc2;
  --color-blockquote-border: #8ab07a;
  --color-blockquote-bg: #ece8e1;
  --color-link: #3d7a4a;
  --color-link-hover: #2d5e38;

  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-bg: #eae6df;
  --sidebar-border: #d0cbc2;

  /* Header */
  --header-height: 56px;
  --header-bg: #2d3128;
  --header-border: #3d4238;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --line-height-heading: 1.3;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* --- Dark Mode --- */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #141a12;
    --color-bg-secondary: #1a2218;
    --color-bg-tertiary: #222c1e;
    --color-text: #dbe0d4;
    --color-text-secondary: #98a690;
    --color-text-muted: #627058;
    --color-border: #2a3426;
    --color-border-light: #222c1e;
    --color-primary: #6dbe6e;
    --color-primary-light: #1a2e1a;
    --color-primary-dark: #8cd88e;
    --color-accent: #7ec87e;
    --color-code-bg: #181e16;
    --color-code-border: #2a3426;
    --color-blockquote-border: #3a4e34;
    --color-blockquote-bg: #1a2218;
    --color-link: #6dbe6e;
    --color-link-hover: #8cd88e;

    --sidebar-bg: #161e14;
    --sidebar-border: #2a3426;

    --header-bg: #111810;
    --header-border: #243020;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
  }
}

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

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + var(--spacing-lg));
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--spacing-lg);
  max-width: 100%;
  gap: var(--spacing-md);
}

.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-toggle:hover {
  background: var(--color-bg-tertiary);
}

.site-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: #dbe0d4;
  font-weight: 600;
  font-size: 1.1rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-logo {
  height: 28px;
  width: auto;
}

/* --- Search --- */
.header-search {
  flex: 1;
  max-width: 480px;
  margin-left: auto;
  position: relative;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 36px;
  padding: 0 var(--spacing-lg) 0 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-secondary);
  color: var(--color-text);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.search-shortcut {
  position: absolute;
  right: 8px;
  padding: 2px 6px;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  pointer-events: none;
  line-height: 1.4;
}

.search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: 200;
}

.search-result-item {
  display: block;
  padding: 10px 16px;
  text-decoration: none;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover,
.search-result-item.search-result-active {
  background: var(--color-bg-secondary);
}

.search-result-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--color-text);
}

.search-result-snippet {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.search-result-item mark {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 1px 2px;
  border-radius: 2px;
}

/* --- Layout --- */
.layout {
  display: flex;
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 50;
  transition: transform var(--transition-slow);
  overscroll-behavior: contain;
}

.sidebar-nav {
  padding: var(--spacing-md) 0;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 40;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

/* --- Navigation --- */
.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item,
.nav-section {
  margin: 0;
}

.nav-link {
  display: block;
  padding: 6px var(--spacing-lg);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: color var(--transition-fast), background var(--transition-fast),
    border-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text);
  background: var(--color-bg-tertiary);
}

.nav-link.nav-active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-left-color: var(--color-primary);
  font-weight: 500;
}

/* Nav groups (folders — always visible, no toggle) */
.nav-group {
  margin-top: var(--spacing-md);
}

.nav-group:first-child {
  margin-top: 0;
}

.nav-group-title {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  user-select: none;
}

.nav-group-children {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-group-children .nav-link {
  padding-left: calc(var(--spacing-lg) + var(--spacing-md));
  font-size: 0.8125rem;
}

.nav-group-children .nav-group-children .nav-link {
  padding-left: calc(var(--spacing-lg) + var(--spacing-xl));
}

/* --- Main Content --- */
.content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
  padding: var(--spacing-2xl) var(--spacing-2xl) 80px;
  max-width: 100%;
}

.prose {
  max-width: 780px;
  margin: 0 auto;
}

/* --- Typography / Prose --- */
.prose h1,
.prose h2,
.prose h3,
.prose h4,
.prose h5,
.prose h6 {
  color: var(--color-text);
  font-weight: 600;
  line-height: var(--line-height-heading);
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  scroll-margin-top: calc(var(--header-height) + var(--spacing-lg));
}

.prose h1 {
  font-size: 2rem;
  margin-top: 0;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--color-border-light);
}

.prose h2 {
  font-size: 1.5rem;
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--color-border-light);
}

.prose h3 {
  font-size: 1.25rem;
}

.prose h4 {
  font-size: 1.1rem;
}

.prose h5 {
  font-size: 1rem;
}

.prose h6 {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.prose p {
  margin-bottom: 1em;
}

.prose a {
  color: var(--color-link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.prose a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

.prose strong {
  font-weight: 600;
  color: var(--color-text);
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-xl) 0;
}

/* Lists */
.prose ul,
.prose ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}

.prose li {
  margin-bottom: 0.35em;
}

.prose li > ul,
.prose li > ol {
  margin-top: 0.35em;
  margin-bottom: 0;
}

/* Task lists (GFM) */
.prose ul:has(> li > input[type="checkbox"]) {
  list-style: none;
  padding-left: 0.5em;
}

.prose li > input[type="checkbox"] {
  margin-right: 0.5em;
  accent-color: var(--color-primary);
}

/* Blockquotes */
.prose blockquote {
  margin: 0 0 1em;
  padding: var(--spacing-md) var(--spacing-lg);
  border-left: 3px solid var(--color-blockquote-border);
  background: var(--color-blockquote-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

/* Inline code */
.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  word-break: break-word;
}

/* Code blocks */
.prose pre {
  margin-bottom: 1em;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-code-bg);
  border: 1px solid var(--color-code-border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: 1.55;
  -webkit-overflow-scrolling: touch;
}

.prose pre code {
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
  color: var(--color-text);
  font-size: 0.8125rem;
  word-break: normal;
}

/* Tables */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
  font-size: 0.875rem;
  overflow-x: auto;
  display: block;
}

.prose thead {
  display: table;
  width: 100%;
  table-layout: fixed;
}

.prose tbody {
  display: table;
  width: 100%;
  table-layout: fixed;
}

.prose th {
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.prose td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

.prose tr:hover td {
  background: var(--color-bg-secondary);
}

/* Definition lists */
.prose dt {
  font-weight: 600;
  margin-top: 1em;
}

.prose dd {
  margin-left: 1.5em;
  margin-bottom: 0.5em;
}

/* --- Syntax Highlighting Base (language class hooks) --- */
.prose pre code[class*="language-"] {
  color: var(--color-text);
}

/* Token styles for client-side highlighters (Prism / highlight.js compatible) */
.hljs-comment,
.hljs-quote {
  color: var(--color-text-muted);
  font-style: italic;
}

.hljs-keyword,
.hljs-selector-tag,
.hljs-type {
  color: #d73a49;
}

.hljs-string,
.hljs-attr,
.hljs-symbol,
.hljs-bullet,
.hljs-addition {
  color: #22863a;
}

.hljs-number,
.hljs-literal {
  color: #005cc5;
}

.hljs-title,
.hljs-section,
.hljs-built_in {
  color: #6f42c1;
}

.hljs-name,
.hljs-tag {
  color: #22863a;
}

.hljs-variable,
.hljs-template-variable {
  color: #e36209;
}

.hljs-deletion {
  color: #b31d28;
  background: #ffeef0;
}

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

@media (prefers-color-scheme: dark) {
  .hljs-keyword,
  .hljs-selector-tag,
  .hljs-type {
    color: #ff7b72;
  }

  .hljs-string,
  .hljs-attr,
  .hljs-symbol,
  .hljs-bullet,
  .hljs-addition {
    color: #7ee787;
  }

  .hljs-number,
  .hljs-literal {
    color: #79c0ff;
  }

  .hljs-title,
  .hljs-section,
  .hljs-built_in {
    color: #d2a8ff;
  }

  .hljs-name,
  .hljs-tag {
    color: #7ee787;
  }

  .hljs-variable,
  .hljs-template-variable {
    color: #ffa657;
  }

  .hljs-deletion {
    color: #ffa198;
    background: #490202;
  }
}

/* --- Responsive: Tablet and Mobile --- */
@media (max-width: 1024px) {
  .content {
    padding: var(--spacing-xl) var(--spacing-lg) 80px;
  }
}

@media (max-width: 768px) {
  .sidebar-toggle {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
    width: min(var(--sidebar-width), 85vw);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.sidebar-open {
    transform: translateX(0);
  }

  .sidebar-overlay.overlay-visible {
    display: block;
    opacity: 1;
  }

  .content {
    margin-left: 0;
    padding: var(--spacing-lg) var(--spacing-md) 60px;
  }

  .header-search {
    display: none;
  }

  .prose h1 {
    font-size: 1.65rem;
  }

  .prose h2 {
    font-size: 1.3rem;
  }

  .prose h3 {
    font-size: 1.1rem;
  }

  .search-shortcut {
    display: none;
  }
}

/* --- Scrollbar Styling --- */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* --- Print --- */
@media print {
  .site-header,
  .sidebar,
  .sidebar-toggle,
  .sidebar-overlay,
  .header-search {
    display: none !important;
  }

  .content {
    margin-left: 0;
    padding: 0;
  }

  .prose {
    max-width: 100%;
  }
}