/* CSS Variables for Light Monochrome Theme */

:root {
  --bg-color: #ffffff;
  --bg-secondary: #f6f6f6;
  --text-primary: #111111;
  --text-secondary: #666666;
  --border-color: #e5e5e5;
  --border-dark: #111111;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --max-width: 1320px;
  --radius: 4px;
  /* Minimalistic sharp-corner feel */
}

/* Base resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Layout Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 40px;
  width: 100%;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
  font-family: var(--font-mono);
}

.main-nav {
  display: flex;
  gap: 20px;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.main-nav a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 8px 16px;
  background: var(--text-primary);
  color: var(--bg-color);
  border: 1px solid var(--text-primary);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.btn:hover {
  background: #333333;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--text-primary);
  color: var(--bg-color);
}

.btn-full {
  display: block;
  width: 100%;
  margin-bottom: 8px;
}

/* Hero Section */
.hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border-color);
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 10px;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 30px;
}

/* Search Box */
.search-box {
  display: flex;
  gap: 10px;
  max-width: 600px;
  margin-bottom: 20px;
}

.search-box input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  font-size: 1rem;
  outline: none;
}

.search-box input:focus {
  border-color: var(--border-dark);
}

.search-box button {
  padding: 0 20px;
  background: var(--text-primary);
  color: var(--bg-color);
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
}

/* Quick Tags */
.quick-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  flex-wrap: wrap;
}

.tag-label {
  color: var(--text-secondary);
}

.tag {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  padding: 4px 8px;
  border-radius: var(--radius);
  color: var(--text-primary);
}

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

/* Grid Layout (Desktop) */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  padding: 40px 0;
}

/* Section Common Styles */
.section {
  margin-bottom: 40px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
  font-size: 1.3rem;
  letter-spacing: -0.5px;
}

.link-more {
  font-size: 0.85rem;
  font-weight: 600;
}

/* KB Cards */
.card-list {
  display: grid;
  gap: 15px;
}

.card {
  display: block;
  padding: 20px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: border-color 0.2s;
}

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

.card-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.card-title {
  font-size: 1.1rem;
  margin: 6px 0;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Forum List */
.forum-list {
  display: flex;
  flex-direction: column;
}

.forum-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}

.forum-item:hover .forum-title {
  text-decoration: underline;
}

.forum-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.forum-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.forum-time {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  white-space: nowrap;
  margin-left: 20px;
}

/* Sidebar */
.sidebar-block {
  padding: 20px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.sidebar-block h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.sidebar-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
}

.stats-list {
  list-style: none;
}

.stats-list li {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color);
}

.stats-list li:last-child {
  border-bottom: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 30px 0;
  margin-top: 40px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 15px;
}

/* Responsive Styles (Mobile Adaptability) */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 15px;
    align-items: flex-start;
  }

  .content-grid {
    grid-template-columns: 1fr;
    /* Stack into 1 column on mobile */
    gap: 20px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .search-box {
    flex-direction: column;
  }

  .search-box button {
    padding: 12px;
  }

  .footer-container {
    flex-direction: column;
    gap: 15px;
    align-items: flex-start;
  }
}

/* ==========================================================================
   NEW COMPONENTS: KB, Forum, Community, Text Pages
   ========================================================================== */

/* Badges & Tags */
/* Fixed Badge Alignment */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 3px 6px;
  border-radius: var(--radius);
  text-transform: uppercase;
  font-weight: 600;
  line-height: 1;
  vertical-align: middle;
  margin-right: 6px;
}

.badge-solved {
  background: #111111;
  color: #ffffff;
}

.badge-open {
  border: 1px solid var(--border-dark);
  color: var(--text-primary);
}

.badge-beginner {
  background: #e0e0e0;
  color: #111111;
}

.badge-advanced {
  background: #111111;
  color: #ffffff;
}

/* Notice Banner (Anti-toxicity rule) */
.notice-banner {
  background: var(--bg-secondary);
  border-left: 3px solid var(--border-dark);
  padding: 15px 20px;
  margin-bottom: 25px;
  font-size: 0.9rem;
}

/* KB Tree Navigation */
.kb-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 30px;
}

.tree-nav details {
  margin-bottom: 10px;
}

.tree-nav summary {
  font-weight: 600;
  cursor: pointer;
  padding: 6px 0;
  list-style: none;
}

.tree-nav summary::-webkit-details-marker {
  display: none;
}

.tree-nav ul {
  list-style: none;
  padding-left: 15px;
  margin-top: 5px;
}

.tree-nav li a {
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.tree-nav li a:hover,
.tree-nav li a.active {
  color: var(--text-primary);
  font-weight: 500;
}

/* Article View Layout (KB Article) */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 40px;
}

.article-content h2 {
  margin: 25px 0 10px;
  font-size: 1.4rem;
}

.article-content p {
  margin-bottom: 15px;
  color: #333;
}

/* Code Blocks */
.code-block {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin: 15px 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.code-block pre {
  padding: 15px;
  overflow-x: auto;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 0.75rem;
  padding: 3px 8px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  cursor: pointer;
}

/* Table of Contents (TOC) */
.toc {
  position: sticky;
  top: 20px;
  font-size: 0.85rem;
  border-left: 1px solid var(--border-color);
  padding-left: 15px;
}

.toc h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.toc ul {
  list-style: none;
}

.toc li {
  margin-bottom: 6px;
}

.toc a {
  color: var(--text-secondary);
}

.toc a:hover {
  color: var(--text-primary);
}

/* Forum Controls & Table */
.forum-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 15px;
}

.filter-group {
  display: flex;
  gap: 10px;
}

.filter-btn {
  background: none;
  border: none;
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px 8px;
}

.filter-btn.active {
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--text-primary);
}

.forum-table {
  width: 100%;
  border-collapse: collapse;
}

.forum-table th,
.forum-table td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.forum-table th {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.forum-stats-col {
  width: 90px;
  text-align: center !important;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Progress Bar (Sponsors) */
.progress-container {
  margin: 15px 0;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--text-primary);
}

/* Static Content Layout (Privacy, Rules) */
.static-page {
  max-width: 750px;
  margin: 40px auto;
}

.static-page h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.static-page h2 {
  font-size: 1.3rem;
  margin: 30px 0 10px;
}

.static-page p,
.static-page ul {
  margin-bottom: 15px;
  color: #333;
}

.static-page ul {
  padding-left: 20px;
}

/* Responsive adjustments */
@media (max-width: 768px) {

  .kb-layout,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    display: none;
  }

  .forum-stats-col {
    display: none;
  }
}

/* ==========================================================================
   MARKDOWN PARSER STYLES
   ========================================================================== */

.article-content h1,
.article-content h2,
.article-content h3 {
  margin: 25px 0 12px 0;
  letter-spacing: -0.5px;
}

.article-content p {
  margin-bottom: 15px;
  line-height: 1.6;
}

/* Inline code style: `print("hello")` */
.article-content code {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: var(--radius);
  font-size: 0.85em;
}

/* Multi-line code block style: ```python ... ``` */
.article-content pre {
  background: #111111;
  color: #ffffff;
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 20px 0;
  font-family: var(--font-mono);
}

.article-content pre code {
  background: transparent;
  border: none;
  color: inherit;
  padding: 0;
  font-size: 0.9em;
}

.article-content ul,
.article-content ol {
  margin: 10px 0 20px 20px;
}

/* ==========================================================================
   ADVANCED MARKDOWN STYLING (Articles & Replies)
   ========================================================================== */

.article-content,
.reply-content {
  line-height: 1.6;
  color: var(--text-primary);
}

.article-content h1,
.reply-content h1 {
  font-size: 1.6rem;
  margin: 25px 0 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.article-content h2,
.reply-content h2 {
  font-size: 1.3rem;
  margin: 20px 0 10px;
}

.article-content h3,
.reply-content h3 {
  font-size: 1.1rem;
  margin: 15px 0 8px;
}

.article-content p,
.reply-content p {
  margin-bottom: 14px;
}

.article-content hr,
.reply-content hr {
  border: 0;
  border-top: 1px solid var(--border-color);
  margin: 25px 0;
}

/* Lists */
.article-content ul,
.reply-content ul,
.article-content ol,
.reply-content ol {
  margin: 10px 0 15px 25px;
}

.article-content li,
.reply-content li {
  margin-bottom: 4px;
}

/* Blockquotes */
.article-content blockquote,
.reply-content blockquote {
  border-left: 3px solid var(--border-dark);
  padding: 10px 15px;
  margin: 15px 0;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Inline Code & Code Blocks */
.article-content code,
.reply-content code {
  font-family: var(--font-mono);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: var(--radius);
  font-size: 0.85em;
}

.article-content pre,
.reply-content pre {
  background: #111111;
  color: #ffffff;
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 18px 0;
  font-family: var(--font-mono);
}

.article-content pre code,
.reply-content pre code {
  background: transparent;
  border: none;
  color: inherit;
  padding: 0;
  font-size: 0.9em;
}

/* Tables */
.article-content table,
.reply-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.article-content th,
.reply-content th,
.article-content td,
.reply-content td {
  border: 1px solid var(--border-color);
  padding: 10px 12px;
  text-align: left;
}

.article-content th,
.reply-content th {
  background: var(--bg-secondary);
  font-weight: 600;
}

/* Images & Spoilers */
.article-content img,
.reply-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 15px 0;
}

.article-content details,
.reply-content details {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: var(--radius);
  margin: 15px 0;
}

.article-content summary,
.reply-content summary {
  font-weight: 600;
  cursor: pointer;
}

/* Strikethrough text ~~text~~ */
del,
s {
  color: var(--text-secondary);
  text-decoration: line-through;
}

/* Task lists / Checkboxes - [x] */
.task-list-item {
  list-style-type: none !important;
  margin-left: -20px !important;
}

.task-list-item input[type="checkbox"] {
  margin-right: 8px;
  accent-color: #111111;
  /* Monochrome checkbox style */
  vertical-align: middle;
}

/* User Bio Styling & Overflow Protection */
.user-bio {
  word-break: break-word;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  line-height: 1.5;
  color: var(--text-primary);
}

/* Seamless Bio - Consistent Gray Color & Zero Indentation */
details.bio-expandable summary::-webkit-details-marker,
details.bio-expandable summary::marker {
  display: none !important;
}

details.bio-expandable summary {
  list-style: none !important;
  color: var(--text-secondary) !important;
  /* Always soft gray */
}

details.bio-expandable .bio-preview {
  display: inline;
  color: var(--text-secondary) !important;
}

details.bio-expandable .bio-full {
  display: none;
  color: var(--text-secondary) !important;
}

/* Expanded state: Keep identical gray color */
details.bio-expandable[open] .bio-preview {
  display: none;
}

details.bio-expandable[open] .bio-full {
  display: inline;
}

/* ==========================================================================
   WIKI & HOVER TOOLTIP STYLES
   ========================================================================== */

/* Floating Wiki Tooltip Popover */
.wiki-popover {
  position: fixed;
  display: none;
  z-index: 9999;
  max-width: 320px;
  background: #ffffff;
  color: var(--text-primary);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  font-size: 0.85rem;
  line-height: 1.45;
  pointer-events: none;
  transition: opacity 0.15s ease-out;
}

.wiki-popover-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.wiki-popover-cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.wiki-popover-summary {
  color: #333333;
  margin-bottom: 8px;
}

.wiki-popover-hint {
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 6px;
}

/* Wiki Links across the site */
a[href^="/wiki/"] {
  border-bottom: 1px dotted var(--text-primary);
  text-decoration: none;
}

a[href^="/wiki/"]:hover {
  border-bottom-style: solid;
}

/* A-Z Glossary Index Navigation */
.wiki-az-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 20px 0 30px;
  padding: 10px;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.wiki-az-bar a {
  padding: 2px 6px;
  color: var(--text-secondary);
}

.wiki-az-bar a:hover {
  color: var(--text-primary);
  font-weight: bold;
}

.wiki-letter-group {
  margin-bottom: 30px;
}

.wiki-letter-title {
  font-size: 1.4rem;
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 4px;
  margin-bottom: 15px;
  font-family: var(--font-mono);
}