/* ==========================================================================
   Parent Tech Forum — main.css
   Dark-mode-only forum aesthetic (Reddit/StackExchange inspired)
   Structural rules: right sidebar (280px), no smooth-scroll, no reading
   progress bar, card hover = background-color-change (NOT translateY),
   768px breakpoint.
   ========================================================================== */

:root {
  /* Canvas / surfaces */
  --canvas: #0E1113;
  --surface: #1A1A1B;
  --surface-hover: #272729;
  --border: #343536;

  /* Text */
  --text-primary: #D7DADC;
  --text-secondary: #818384;

  /* Accents */
  --upvote: #FF4500;
  --downvote: #7193FF;
  --link: #0079D3;
  --success: #46A35E;
  --gold: #F2A60C;

  /* Tags */
  --tag-bg: #26262B;
  --tag-text: #D7DADC;

  /* Type */
  --font-main: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--canvas);
  color: var(--text-primary);
  font-family: var(--font-main);
  /* NOTE: no scroll-behavior: smooth — this site does not use smooth scroll */
}

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

img { max-width: 100%; display: block; }

/* ============ Announcement Bar ============ */
.announcement-bar {
  background: #3E2723;
  color: #FFE082;
  border-bottom: 1px solid #5D4037;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
}
.announcement-bar a { color: #FFE082; text-decoration: underline; }
.announcement-close {
  background: none;
  border: none;
  color: #FFE082;
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
}
.announcement-bar.hidden { display: none; }

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  padding: 0 20px;
}
.site-header.scrolled .header-inner { height: 56px; }
.site-header.scrolled .site-logo { font-size: 20px; }

.site-logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.header-search { flex: 1; display: flex; justify-content: center; }

.search-bar {
  position: relative;
  width: 400px;
  max-width: 100%;
  height: 40px;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  border-radius: 20px;
  display: flex;
  align-items: center;
  padding: 0 8px 0 12px;
}
.site-header.scrolled .search-bar { height: 36px; }
.search-icon { color: var(--text-secondary); flex-shrink: 0; }
.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 13px;
  padding: 0 8px;
}
.search-bar input::placeholder { color: var(--text-secondary); }
.search-submit {
  background: var(--link);
  color: #fff;
  border: none;
  border-radius: 16px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.search-results {
  display: none;
  position: absolute;
  top: 46px;
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 50;
}
.search-results.open { display: block; }
.search-results a {
  display: block;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.search-results a:hover { background: var(--surface-hover); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.btn {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text-primary);
  background: transparent;
}
.btn-secondary:hover { background: var(--surface-hover); text-decoration: none; }
.btn-primary {
  background: var(--link);
  color: #fff;
}
.btn-primary:hover { background: #0066B2; text-decoration: none; }
.btn-ask {
  background: var(--link);
  color: #fff;
}
.btn-ask:hover { background: #0066B2; text-decoration: none; }
.btn-ask-sidebar { display: block; width: 100%; text-align: center; margin-bottom: 16px; padding: 12px 20px; }

.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 24px;
  height: 24px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.hamburger-btn span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
}
.mobile-menu.open { display: flex; }
.mobile-menu-heading {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 12px 16px 4px;
  margin: 0;
}
.mobile-menu a {
  padding: 12px 16px;
  color: var(--text-primary);
  border-top: 1px solid var(--border);
}
.mobile-menu a:hover { background: var(--surface-hover); text-decoration: none; }
.mobile-menu hr { border-color: var(--border); margin: 0; }

/* ============ Category Tabs (desktop) ============ */
.category-nav {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--canvas);
  padding: 0 20px;
}
.category-tab {
  font-size: 14px;
  font-weight: 600;
  padding: 12px 20px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
}
.category-tab:hover { color: var(--text-primary); text-decoration: none; }
.category-tab.active {
  color: var(--upvote);
  border-bottom-color: var(--upvote);
}

/* ============ Layout: center feed + right sidebar (280px) ============ */
.forum-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 24px;
}
.thread-detail-layout { grid-template-columns: 1fr 280px; }
.thread-main { max-width: 720px; }

.forum-feed { min-width: 0; }

.feed-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.sort-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.sort-label { font-size: 13px; color: var(--text-secondary); }
.sort-tab {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}
.sort-tab:hover { color: var(--text-primary); text-decoration: none; }
.sort-tab.active { color: var(--upvote); text-decoration: underline; }
.showing-count { font-size: 13px; color: var(--text-secondary); }

/* ============ Thread Card (listing) ============ */
.thread-card {
  display: flex;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 12px;
  /* hover = background-color-change only, NOT translateY */
  transition: background-color 0.2s ease;
}
.thread-card:hover { background-color: var(--surface-hover); }
.thread-pinned { background-color: #201c14; border-color: #3a2f1a; }

.thread-vote { flex-shrink: 0; text-align: center; min-width: 28px; }
.thread-vote .vote-count { font-size: 14px; font-weight: 600; color: var(--text-primary); }

.thread-status { flex-shrink: 0; }

.thread-content { flex: 1; min-width: 0; }
.thread-title { margin: 0 0 4px; font-size: 18px; font-weight: 600; line-height: 1.3; }
.thread-title a { color: var(--text-primary); }
.thread-title a:hover { color: var(--link); text-decoration: none; }
.thread-meta { margin: 0 0 4px; font-size: 13px; color: var(--text-secondary); }
.thread-stats { margin: 0 0 8px; font-size: 13px; color: var(--text-secondary); }
.thread-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* Badges */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
}
.badge-resolved { background: rgba(70,163,94,0.1); color: var(--success); }
.badge-answered { background: rgba(0,121,211,0.1); color: var(--link); }
.badge-unanswered { background: rgba(255,69,0,0.1); color: var(--upvote); }
.badge-hot { background: rgba(255,69,0,0.1); color: var(--upvote); }
.badge-pinned { background: rgba(242,166,12,0.1); color: var(--gold); }
.badge-new { background: rgba(129,131,132,0.15); color: var(--text-secondary); }
.badge-power { background: rgba(242,166,12,0.1); color: var(--gold); }
.badge-verified { background: rgba(70,163,94,0.1); color: var(--success); }
.badge-expert { background: rgba(0,121,211,0.1); color: var(--link); }
.badge-accepted { background: rgba(70,163,94,0.1); color: var(--success); padding: 6px 10px; }
.badge-op { background: rgba(129,131,132,0.15); color: var(--text-secondary); }

/* Tag pills */
.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-text);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 16px;
}
a.tag:hover { background: #303038; text-decoration: none; }

/* ============ Pagination ============ */
.pagination {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.pagination-controls { display: flex; gap: 6px; align-items: center; }
.page-btn {
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 4px;
  color: var(--text-secondary);
}
.page-btn:hover { background: var(--surface-hover); text-decoration: none; }
.page-btn.active { background: var(--upvote); color: #fff; }
.page-btn.disabled { opacity: 0.4; pointer-events: none; }

/* ============ Right Sidebar (280px) ============ */
.forum-sidebar {
  width: 280px;
  position: sticky;
  top: 88px; /* header height + gap */
  align-self: start;
}
.sidebar-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}
.sidebar-box-title { font-size: 14px; font-weight: 600; margin: 0 0 12px; }
.stats-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 13px; color: var(--text-secondary); }
.contributors-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.contributors-list li { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.contributors-list a { font-weight: 600; color: var(--text-primary); }
.contributors-list .rep { margin-left: auto; font-size: 11px; color: var(--text-secondary); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.sidebar-link {
  display: block;
  font-size: 13px;
  color: var(--link);
  padding: 12px 0;
}

.avatar { border-radius: 50%; border: 1px solid var(--border); }
.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 48px; height: 48px; }

/* ============ Breadcrumb ============ */
.breadcrumb {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 12px 0;
}
.breadcrumb .separator { margin: 0 6px; }
.breadcrumb a:hover { color: var(--link); text-decoration: none; }
.breadcrumb .current { color: var(--text-primary); }

/* ============ Category Archive ============ */
.category-title { font-size: 24px; font-weight: 700; margin: 8px 0 8px; }
.category-description { font-size: 14px; color: var(--text-secondary); margin: 0 0 20px; max-width: 640px; line-height: 1.6; }

/* ============ Question / Answer Blocks ============ */
.thread-title-detail { font-size: 24px; font-weight: 700; line-height: 1.3; margin: 12px 0 12px; }

.qa-block {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.answer-block { margin-top: 16px; }
.answer-block.accepted {
  border-left: 4px solid var(--success);
  padding-left: 16px;
  background: rgba(70,163,94,0.03);
}

.qa-vote {
  flex-shrink: 0;
  width: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.vote-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: default;
}
.vote-btn:hover { background: var(--surface-hover); }
.vote-btn.voted { color: var(--upvote); }
.qa-vote .vote-count { font-size: 14px; font-weight: 600; color: var(--text-primary); }

.qa-content { flex: 1; min-width: 0; }
.qa-header { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 12px; }
.qa-author-info { flex: 1; min-width: 0; }
.author-name-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.username { font-size: 14px; font-weight: 600; }
.username.tier-new { color: var(--text-secondary); }
.username.tier-power { color: var(--gold); }
.username.tier-verified { color: var(--success); }
.username.tier-expert { color: var(--link); }
.author-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.qa-timestamp { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }

.qa-body { font-size: 16px; line-height: 1.6; max-width: 720px; }
.qa-body p { margin: 0 0 12px; }
.qa-meta-row { font-size: 13px; color: var(--text-secondary); margin: 12px 0; }
.qa-tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 12px 0; }

.qa-actions { display: flex; align-items: center; gap: 16px; margin-top: 16px; position: relative; }
.action-btn {
  background: none;
  border: none;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
}
.action-btn:hover { color: var(--link); }

.nested-reply {
  margin-left: 48px;
  padding: 12px 0 0;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}

/* Share dropdown */
.share-wrapper { position: relative; }
.share-dropdown {
  display: none;
  position: absolute;
  top: 24px;
  left: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  min-width: 160px;
  z-index: 20;
}
.share-dropdown.open { display: block; }
.share-option {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-size: 14px;
  color: var(--text-primary);
  padding: 10px 12px;
  cursor: pointer;
}
.share-option:hover { background: var(--surface-hover); }

.answers-toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 20px 0;
  flex-wrap: wrap;
}
.answers-count { font-size: 14px; font-weight: 600; }

.section-divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

/* Reply composer (non-functional) */
.reply-composer { margin-top: 32px; }
.reply-composer h4 { font-size: 16px; margin: 0 0 12px; }
.composer-textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 14px;
  padding: 12px;
  resize: vertical;
}
.composer-submit { margin-top: 12px; }
.composer-note { font-size: 13px; color: var(--text-secondary); margin-top: 8px; }

.related-questions { margin-top: 24px; }
.related-questions h4 { font-size: 16px; margin: 0 0 12px; }
.related-questions ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.related-questions li { font-size: 14px; }

/* ============ Footer ============ */
.site-footer { background: var(--canvas); border-top: 1px solid var(--border); }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-primary);
  margin: 0 0 12px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.footer-col a:hover { color: var(--link); text-decoration: none; }

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 20px;
}
.footer-powered {
  text-align: right;
  font-size: 11px;
  color: #6A737C;
  margin: 0 0 12px;
}
.footer-bottom-inner {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}
.social-icons { display: flex; gap: 16px; }
.social-icons a { color: var(--text-secondary); }
.social-icons a:hover { color: var(--upvote); }

/* ============ Cookie Banner (bottom-left) ============ */
.cookie-banner {
  display: none;
  position: fixed;
  bottom: 24px;
  left: 24px;
  max-width: 320px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  font-size: 13px;
  line-height: 1.4;
  z-index: 200;
}
.cookie-banner.visible { display: block; }
.cookie-accept {
  margin-top: 10px;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
}

/* ============ Back to Top (bottom-right) ============ */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, background-color 0.2s ease;
  z-index: 150;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--border); }

/* ==========================================================================
   768px breakpoint — mobile
   ========================================================================== */
@media (max-width: 768px) {
  .header-inner { height: auto; padding: 12px 16px; flex-wrap: wrap; }
  .site-logo { font-size: 20px; }
  .header-search { order: 3; width: 100%; }
  .search-bar { width: 100%; }
  .header-actions { order: 2; }
  .btn-ask-desktop { display: none; }
  .btn-secondary, .btn-primary { display: none; }
  .hamburger-btn { display: flex; }

  .category-nav { display: none; }

  .forum-layout { grid-template-columns: 1fr; }
  .forum-sidebar { display: none; }

  .thread-card { padding: 12px 14px; }
  .thread-title { font-size: 16px; }

  .qa-header { flex-wrap: wrap; }
  .qa-timestamp { width: 100%; margin-top: 4px; }
  .nested-reply { margin-left: 16px; }

  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom-inner { flex-direction: column; align-items: flex-start; }
}