/*
 * IndexGram — OS/2 Warp 3.0 Theme
 * Inspired by IBM OS/2 Warp Workplace Shell (1994)
 */

/* ── CSS Custom Properties ─────────────────────────────────────────────────── */
:root {
  --desktop-bg:        #1A0A2E;   /* Deep indigo desktop */
  --window-bg:         #C8C4D0;   /* Window/panel soft gray-lavender */
  --titlebar-bg:       #5B2D8E;   /* Rose-purple titlebar */
  --titlebar-bg-end:   #2D1B6B;   /* Gradient end — deep indigo */
  --titlebar-text:     #FFFFFF;
  --titlebar-inactive: #8070A0;
  --text-color:        #000000;
  --link-color:        #4A007A;
  --link-hover:        #7B2FBE;
  --accent-color:      #5B2D8E;
  --content-bg:        #FFFFFF;
  --footer-bg:         #9888B0;
  --footer-text:       #000000;
  --border-light:      #E0D8EC;
  --border-mid:        #8070A0;
  --border-dark:       #3A2050;
  --button-bg:         #C8C4D0;
  --input-border:      #8070A0;
  --code-bg:           #F5F0FF;
  --table-header-bg:   #5B2D8E;
  --table-header-text: #FFFFFF;
  --table-row-alt:     #EDE8F5;
  --tag-bg:            #5B2D8E;
  --tag-text:          #FFFFFF;
  --sidebar-bg:        #C8C4D0;
  --flash-success-bg:  #C8F0C8;
  --flash-error-bg:    #FFD0D0;
  --flash-info-bg:     #DDD0F8;
}

/* ── Base ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

/* ── Global link-as-button ─────────────────────────────────────────────────── */
/* All <a> elements look like OS/2 beveled buttons by default */
a {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 9px;
  background: var(--button-bg, #C0C0C0);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  color: var(--text-color, #000000);
  text-decoration: none;
  font-size: inherit;
  font-family: inherit;
  cursor: pointer;
  line-height: 1.4;
  box-shadow: 1px 1px 0 var(--border-mid);
}
a:hover {
  background: var(--titlebar-bg, #5B2D8E);
  color: var(--titlebar-text, #FFFFFF);
  border-color: #8050C0 #1A0840 #1A0840 #8050C0;
}
a:active {
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
  box-shadow: none;
  transform: translate(1px, 1px);
}

/* Markdown / document body links stay as readable inline text */
.markdown-body a,
.markdown-body a:hover {
  display: inline;
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
  color: var(--link-color, #0000AA);
  text-decoration: underline;
  transform: none;
}
.markdown-body a:hover { color: var(--link-hover, #0000FF); }

html { height: 100%; }

body {
  margin: 0;
  padding: 0;
  background-color: var(--desktop-bg);
  color: var(--text-color);
  font-family: 'Helvetica Neue', Helvetica, Arial, 'Lucida Sans', sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Desktop wrapper ───────────────────────────────────────────────────────── */
#desktop {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Taskbar / Nav ─────────────────────────────────────────────────────────── */
#taskbar {
  background: var(--window-bg);
  border-bottom: 3px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  display: flex;
  align-items: stretch;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

#taskbar-logo {
  background: var(--titlebar-bg);
  background: linear-gradient(90deg, var(--titlebar-bg) 0%, var(--titlebar-bg-end, #2D1B6B) 100%);
  color: var(--titlebar-text);
  padding: 4px 14px;
  font-weight: bold;
  font-size: 14px;
  display: flex;
  align-items: center;
  letter-spacing: 0.5px;
  border-right: 2px solid var(--border-dark);
}

#taskbar-logo .site-logo { max-height: 32px; }
#taskbar-logo .site-title-nav { font-size: 15px; }

#taskbar-links {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  flex: 1;
}

#taskbar-links a {
  display: flex;
  align-items: center;
  padding: 4px 12px;
  text-decoration: none;
  color: var(--text-color);
  font-size: 13px;
  border: none;
  border-right: 1px solid var(--border-mid);
  box-shadow: none;
  white-space: nowrap;
  transition: background 0.1s;
  border-radius: 0;
}

#taskbar-links a:hover {
  background: var(--titlebar-bg);
  color: var(--titlebar-text);
  border-color: transparent;
}
#taskbar-links a:active { transform: none; box-shadow: none; }

#taskbar-links a.rss-link { color: #7F3300; font-weight: bold; }
#taskbar-links a.rss-link:hover { background: #7F3300; color: #FFF; }

/* ── Main Window ───────────────────────────────────────────────────────────── */
#main-window {
  flex: 1;
  padding: 10px 12px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ── OS/2-style Window ─────────────────────────────────────────────────────── */
.window {
  background: var(--window-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  margin-bottom: 12px;
  box-shadow: 2px 2px 0 var(--border-dark);
}

.win-titlebar {
  background: var(--titlebar-bg);
  background: linear-gradient(90deg, var(--titlebar-bg) 0%, var(--titlebar-bg-end, #2D1B6B) 100%);
  color: var(--titlebar-text);
  padding: 4px 8px;
  font-weight: bold;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.win-body { padding: 10px; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.button, button.button {
  display: inline-block;
  background: var(--button-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  padding: 3px 12px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  color: var(--text-color);
  text-decoration: none;
  box-shadow: 1px 1px 0 var(--border-mid);
}

.button:active, button.button:active {
  border-color: var(--border-dark) var(--border-light) var(--border-light) var(--border-dark);
  box-shadow: none;
  transform: translate(1px, 1px);
}

.button.btn-sm { padding: 2px 8px; font-size: 12px; }
.full-width { display: block; width: 100%; text-align: center; margin-bottom: 6px; }

/* ── Flash messages ────────────────────────────────────────────────────────── */
.flash {
  padding: 7px 12px;
  margin-bottom: 10px;
  font-size: 13px;
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}
.flash-success { background: var(--flash-success-bg); border-left: 4px solid #008000; }
.flash-error   { background: var(--flash-error-bg);   border-left: 4px solid #CC0000; }
.flash-info    { background: var(--flash-info-bg);    border-left: 4px solid #5B2D8E; }

/* ── Breadcrumb ────────────────────────────────────────────────────────────── */
.breadcrumb {
  font-size: 12px;
  margin-bottom: 8px;
  padding: 3px 6px;
  background: var(--window-bg);
  border-bottom: 1px solid var(--border-mid);
  color: #333333;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
}
.breadcrumb a {
  font-size: 11px;
  padding: 1px 7px;
  color: var(--text-color);
}

/* ── Hero ──────────────────────────────────────────────────────────────────── */
.page-hero {
  margin-bottom: 12px;
  padding: 16px 20px !important;
}
.hero-inner { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.hero-logo  { max-height: 80px; }
.hero-sitename { font-size: 24px; font-weight: bold; color: var(--titlebar-text); letter-spacing: 1px; }
.hero-desc  { margin: 0; color: #333333; font-size: 13px; }

/* ── Section headers ───────────────────────────────────────────────────────── */
.section-titlebar {
  background: var(--titlebar-bg);
  background: linear-gradient(90deg, var(--titlebar-bg) 0%, var(--titlebar-bg-end, #2D1B6B) 100%);
  color: var(--titlebar-text);
  padding: 4px 10px;
  margin-bottom: 10px;
}
.section-titlebar h2 { margin: 0; font-size: 14px; font-weight: bold; }

/* ── Topics grid ───────────────────────────────────────────────────────────── */
.topics-section  { margin-bottom: 16px; }
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.topic-card {
  background: var(--window-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.1s;
  box-shadow: 2px 2px 0 var(--border-mid);
  padding: 0; /* reset global a padding */
}
.topic-card:hover {
  box-shadow: 3px 3px 0 var(--border-dark);
  background: var(--window-bg); /* don't go navy */
  color: inherit;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}
.topic-card:hover .topic-card-title { background: #7B2FBE; }

.topic-card-title {
  background: var(--titlebar-bg);
  background: linear-gradient(90deg, var(--titlebar-bg) 0%, var(--titlebar-bg-end, #2D1B6B) 100%);
  color: var(--titlebar-text);
  padding: 4px 8px;
  font-weight: bold;
  font-size: 13px;
}

.topic-card-body { padding: 8px; flex: 1; }
.topic-thumb { max-width: 100%; max-height: 80px; object-fit: cover; margin-bottom: 6px; display: block; }
.topic-icon  { font-size: 32px; display: block; margin-bottom: 4px; }
.topic-desc  { font-size: 12px; margin: 0 0 6px; color: #333333; }
.topic-count { font-size: 11px; font-weight: bold; color: var(--accent-color); }
.topic-rss   { float: right; font-size: 11px; }
.topic-rss a { color: #7F3300; }

/* ── Document table ────────────────────────────────────────────────────────── */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 4px;
}
.doc-table th {
  background: var(--table-header-bg);
  color: var(--table-header-text);
  padding: 5px 8px;
  text-align: left;
  font-weight: bold;
}
.doc-table td { padding: 5px 8px; border-bottom: 1px solid #B0B0B0; }
.doc-table tr:nth-child(even) td { background: var(--table-row-alt); }
.doc-table tr:hover td { background: #D0D8FF; }
.doc-table a { color: var(--link-color); }

/* ── Document layout (view) ────────────────────────────────────────────────── */
.doc-layout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.doc-window  { flex: 3; min-width: 0; }
.doc-sidebar { flex: 1; min-width: 180px; max-width: 240px; }

.doc-og-image { max-width: 100%; max-height: 300px; object-fit: cover; margin-bottom: 12px; display: block; }

.win-actions { display: flex; gap: 6px; flex-wrap: wrap; }

/* Links inside titlebars stay on dark bg — don't get the gray button look */
.win-titlebar a, .topic-card-title a {
  background: transparent;
  border-color: rgba(255,255,255,0.3) rgba(0,0,40,0.4) rgba(0,0,40,0.4) rgba(255,255,255,0.3);
  color: var(--titlebar-text);
  box-shadow: none;
  padding: 1px 7px;
  font-size: 11px;
}
.win-titlebar a:hover, .topic-card-title a:hover {
  background: rgba(255,255,255,0.2);
  color: var(--titlebar-text);
  border-color: rgba(255,255,255,0.5) rgba(0,0,40,0.6) rgba(0,0,40,0.6) rgba(255,255,255,0.5);
}

/* ── Markdown body ─────────────────────────────────────────────────────────── */
.markdown-body {
  background: var(--content-bg);
  color: var(--text-color);
  padding: 12px;
  font-size: 15px;
  line-height: 1.7;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  color: var(--accent-color);
  margin: 1.2em 0 0.4em;
  font-family: inherit;
}
.markdown-body h1 { font-size: 1.7em; border-bottom: 2px solid var(--accent-color); padding-bottom: 4px; }
.markdown-body h2 { font-size: 1.4em; border-bottom: 1px solid var(--border-mid); padding-bottom: 3px; }
.markdown-body h3 { font-size: 1.2em; }

.markdown-body a { color: var(--link-color); }
.markdown-body a:hover { color: var(--link-hover); }

.markdown-body p { margin: 0.7em 0; }

.markdown-body strong { font-weight: bold; }
.markdown-body em     { font-style: italic; }
.markdown-body del    { text-decoration: line-through; color: #666; }

.markdown-body img.md-img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 10px 0;
  border: 2px solid var(--border-mid);
}

.markdown-body blockquote {
  border-left: 4px solid var(--accent-color);
  margin: 10px 0;
  padding: 6px 14px;
  background: #F0F0F8;
  font-style: italic;
  color: #444;
}

.markdown-body code {
  background: var(--code-bg);
  padding: 1px 5px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.88em;
  border: 1px solid #C0C080;
}

.markdown-body pre {
  background: #1E1E1E;
  color: #D4D4D4;
  padding: 12px;
  overflow-x: auto;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.88em;
  border: 2px inset var(--border-mid);
  margin: 10px 0;
}
.markdown-body pre code { background: none; border: none; padding: 0; color: inherit; }

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
  font-size: 0.93em;
}
.markdown-body table th {
  background: var(--table-header-bg);
  color: var(--table-header-text);
  padding: 6px 10px;
  text-align: left;
  border: 1px solid #404080;
}
.markdown-body table td {
  padding: 5px 10px;
  border: 1px solid #C0C0C0;
}
.markdown-body table tr:nth-child(even) td { background: var(--table-row-alt); }

.markdown-body ul,
.markdown-body ol { margin: 0.5em 0; padding-left: 1.8em; }
.markdown-body li  { margin: 0.2em 0; }

.markdown-body hr {
  border: none;
  border-top: 2px solid var(--border-mid);
  margin: 1.5em 0;
}

/* ── PDF embeds ────────────────────────────────────────────────────────────── */

/* Container */
.pdf-embed {
  margin: 14px 0;
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  background: var(--window-bg);
  box-shadow: 2px 2px 0 var(--border-dark);
}

/* Toolbar bar above the iframe */
.pdf-embed-bar {
  background: var(--titlebar-bg);
  color: var(--titlebar-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 8px;
  gap: 8px;
  flex-wrap: wrap;
}

.pdf-embed-label {
  font-size: 12px;
  font-weight: bold;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.pdf-embed-controls {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-shrink: 0;
}

.pdf-size-btn {
  background: rgba(255,255,255,0.15);
  color: var(--titlebar-text);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 1px 7px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
}
.pdf-size-btn:hover { background: rgba(255,255,255,0.3); }

.pdf-dl-btn {
  color: var(--titlebar-text);
  text-decoration: none;
  font-size: 11px;
  font-weight: bold;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 1px 7px;
}
.pdf-dl-btn:hover { background: rgba(255,255,255,0.25); }

/* The iframe — three size modes toggled by JS */
.pdf-frame {
  display: block;
  width: 100%;
  border: none;
  background: #FFFFFF;
}

/* Default: one letter page tall (8.5:11 ≈ 0.7727 ratio → height = width × 1.294)
   We use aspect-ratio so it scales with the container width */
.pdf-frame-page {
  /* Show approximately one full letter-size page */
  aspect-ratio: 8.5 / 11;
  min-height: 480px;
  max-height: 90vh;
}

/* Tall / scroll: fixed 1200px, comfortable for reading multiple pages */
.pdf-frame-tall {
  height: 1200px;
  max-height: none;
  aspect-ratio: unset;
}

/* Full-screen overlay */
.pdf-frame-full {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  max-height: 100vh;
  z-index: 9900;
  aspect-ratio: unset;
}
.pdf-fullscreen-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9899;
  cursor: pointer;
}

/* Fallback when <iframe> is not supported */
.pdf-fallback {
  padding: 20px;
  text-align: center;
  font-size: 14px;
}

/* PDF link decoration inside markdown body */
.markdown-body a.pdf-link {
  color: var(--link-color);
  font-weight: bold;
}
.markdown-body a.pdf-link::after {
  content: " [PDF]";
  font-size: 0.8em;
  font-weight: normal;
  color: #666;
}

/* ── Video embeds ──────────────────────────────────────────────────────────── */
.video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  margin: 14px 0;
  background: #000;
  border: 2px inset var(--border-mid);
}
.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}
.tiktok-embed { padding-top: 0; }

/* ── Audio embed ───────────────────────────────────────────────────────────── */
.audio-embed {
  margin: 10px 0;
  padding: 8px;
  background: var(--window-bg);
  border: 2px inset var(--border-mid);
}
.audio-embed audio { width: 100%; }

/* ── Tags ──────────────────────────────────────────────────────────────────── */
.tag-badge {
  display: inline-flex;
  align-items: center;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 2px 8px;
  font-size: 11px;
  font-weight: bold;
  margin: 2px 2px 2px 0;
  text-decoration: none;
  border: 1px solid rgba(0,0,0,0.3);
  box-shadow: 1px 1px 0 rgba(0,0,0,0.3);
}
.tag-badge:hover {
  background: var(--tag-bg);
  color: var(--tag-text);
  border-color: rgba(0,0,0,0.6);
  filter: brightness(1.2);
}
.tag-badge.active { outline: 2px solid #000; }
a.tag-badge:active { transform: translate(1px,1px); box-shadow: none; }
.tag-filter { margin: 8px 0; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.tag-filter strong { font-size: 12px; margin-right: 4px; }

/* ── Sidebar ───────────────────────────────────────────────────────────────── */
.sidebar-section { margin-bottom: 10px; }
.doc-meta-list { margin: 0; }
.doc-meta-list dt { font-weight: bold; font-size: 12px; color: #333333; margin-top: 6px; }
.doc-meta-list dd { margin: 0 0 2px 8px; font-size: 13px; }

/* ── Revisions ─────────────────────────────────────────────────────────────── */
.revisions-window { margin-top: 12px; }

/* ── Topic description ─────────────────────────────────────────────────────── */
.topic-description {
  padding: 6px;
  background: var(--content-bg);
  border: 1px inset var(--border-mid);
  margin-bottom: 8px;
  font-size: 14px;
}
.topic-meta { font-size: 11px; color: #444444; margin-bottom: 6px; }
.topic-window .win-body { padding: 10px; }

/* ── RSS badge ─────────────────────────────────────────────────────────────── */
.rss-badge {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  background: #A05000;
  color: #FFF !important;
  padding: 1px 6px;
  text-decoration: none;
  font-weight: bold;
  border: 1px solid #7F3300;
  box-shadow: 1px 1px 0 #5C2400;
}
.rss-badge:hover {
  background: #7F3300 !important;
  color: #FFF !important;
  border-color: #5C2400;
}

/* ── Forms (public) ────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 10px; }
.form-group label { display: block; font-size: 13px; font-weight: bold; margin-bottom: 3px; }
.input-full {
  width: 100%;
  padding: 4px 7px;
  border: 2px solid;
  border-color: var(--border-mid) var(--border-light) var(--border-light) var(--border-mid);
  background: #FFF;
  font-size: 14px;
  font-family: inherit;
}
.input-full:focus { outline: 2px solid var(--accent-color); }
.form-actions { margin-top: 12px; }

/* ── Login window ──────────────────────────────────────────────────────────── */
.login-window .win-body { padding: 20px; }

/* ── Footer ────────────────────────────────────────────────────────────────── */
#site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  border-top: 3px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  margin-top: auto;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8px 12px;
  font-size: 12px;
}
.footer-inner p { margin: 2px 0; }
.footer-links a { color: var(--link-color); margin: 0 4px; font-size: 11px; }

/* ── Recent section ────────────────────────────────────────────────────────── */
.recent-section { margin-bottom: 16px; }

/* ── Document cards grid ────────────────────────────────────────────────────── */
.doc-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.doc-card {
  background: var(--window-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
  display: flex;
  flex-direction: column;
  box-shadow: 2px 2px 0 var(--border-mid);
  transition: box-shadow 0.1s;
}
.doc-card:hover { box-shadow: 3px 3px 0 var(--border-dark); }
.doc-card:hover .doc-card-title { background: #7B2FBE; }

.doc-card-title {
  background: var(--titlebar-bg);
  background: linear-gradient(90deg, var(--titlebar-bg) 0%, var(--titlebar-bg-end, #2D1B6B) 100%);
  color: var(--titlebar-text);
  padding: 4px 8px;
  font-weight: bold;
  font-size: 13px;
  line-height: 1.3;
}
.doc-card-title a {
  display: block;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  color: var(--titlebar-text);
  text-decoration: none;
  font-weight: bold;
}
.doc-card-title a:hover {
  background: transparent;
  color: var(--titlebar-text);
  border-color: transparent;
  text-decoration: underline;
  transform: none;
}

.doc-card-body {
  padding: 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.doc-card-thumb {
  float: right;
  width: 72px;
  height: 72px;
  object-fit: cover;
  margin: 0 0 6px 8px;
  border: 1px solid var(--border-mid);
  flex-shrink: 0;
}

.doc-card-desc {
  font-size: 12px;
  margin: 0 0 8px;
  color: var(--text-color);
  line-height: 1.4;
  /* clamp to 3 lines */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.doc-card-meta {
  margin-top: auto;
  clear: both;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 6px;
  border-top: 1px solid var(--border-mid);
}

.doc-card-tags { display: flex; flex-wrap: wrap; gap: 3px; }

.doc-card-topic {
  font-size: 11px;
  color: #444444;
}
.doc-card-topic a {
  color: var(--link-color);
  font-weight: bold;
  text-decoration: none;
}
.doc-card-topic a:hover { text-decoration: underline; }

/* ── Empty state ───────────────────────────────────────────────────────────── */
.empty-state {
  color: #333333;
  font-style: italic;
  padding: 10px 12px;
  background: var(--window-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}

/* ── Scrollbars (Chromium) ─────────────────────────────────────────────────── */
::-webkit-scrollbar        { width: 14px; height: 14px; }
::-webkit-scrollbar-track  { background: var(--window-bg); border: 1px inset var(--border-mid); }
::-webkit-scrollbar-thumb  {
  background: var(--button-bg);
  border: 2px solid;
  border-color: var(--border-light) var(--border-dark) var(--border-dark) var(--border-light);
}
::-webkit-scrollbar-thumb:hover { background: #A0A0C0; }
::-webkit-scrollbar-button { background: var(--button-bg); border: 1px solid var(--border-mid); display: block; height: 14px; }

/* ── Responsive ────────────────────────────────────────────────────────────── */

/* Table overflow wrapper */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Touch-friendly minimum target size */
.button, button.button, .btn, a.button {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Hamburger — hidden on desktop */
.hamburger {
  display: none;
  background: var(--titlebar-bg);
  border: none;
  color: var(--titlebar-text);
  font-size: 22px;
  padding: 4px 14px;
  cursor: pointer;
  align-self: stretch;
  align-items: center;
  border-left: 2px solid rgba(255,255,255,0.15);
  flex-shrink: 0;
}
.hamburger:active { background: rgba(0,0,0,0.3); }

/* Admin mobile toggle */
.admin-nav-toggle {
  display: none;
  background: rgba(255,255,255,0.15);
  border: none;
  color: var(--titlebar-text);
  font-size: 18px;
  padding: 2px 10px;
  cursor: pointer;
  margin-right: 8px;
}

@media (max-width: 900px) {
  .doc-sidebar { min-width: 160px; max-width: 200px; }
  .topics-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .doc-cards   { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}

@media (max-width: 700px) {
  .hamburger { display: flex; }
  #taskbar { position: relative; flex-wrap: wrap; }
  #taskbar-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--window-bg);
    border-top: 2px solid var(--border-dark);
    border-bottom: 2px solid var(--border-dark);
    z-index: 500;
    box-shadow: 0 4px 8px rgba(0,0,0,0.4);
    max-height: 70vh;
    overflow-y: auto;
  }
  #taskbar-links.nav-open { display: flex; }
  #taskbar-links a { border-right: none; border-bottom: 1px solid var(--border-mid); padding: 10px 14px; font-size: 14px; }
  .doc-layout { flex-direction: column; }
  .doc-sidebar { max-width: 100%; width: 100%; min-width: 0; }
  .topics-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
  .doc-cards   { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .win-body { padding: 8px; }
  #main-window { padding: 6px 8px; }
  .markdown-body { padding: 8px; font-size: 14px; }
  .markdown-body table { display: block; overflow-x: auto; }
  .doc-table { display: block; overflow-x: auto; }
  .win-titlebar { flex-wrap: wrap; gap: 4px; }
  .win-actions { flex-wrap: wrap; }
  .login-window { margin: 16px auto; }
  .login-window .win-body { padding: 14px; }
  .footer-links { word-break: break-word; }
  .pdf-embed-bar { flex-direction: column; align-items: flex-start; gap: 4px; }
  .pdf-embed-controls { width: 100%; flex-wrap: wrap; }
  .form-actions { display: flex; flex-wrap: wrap; gap: 6px; }
  .hero-sitename { font-size: 18px; }
  .breadcrumb { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .doc-table th:nth-child(3), .doc-table td:nth-child(3) { display: none; }
}

@media (max-width: 400px) {
  .topics-grid { grid-template-columns: 1fr 1fr; }
  .doc-cards   { grid-template-columns: 1fr; }
  body { font-size: 13px; }
  .markdown-body { font-size: 13px; }
  .doc-table th:nth-child(4), .doc-table td:nth-child(4) { display: none; }
}

@media (max-width: 800px) {
  #admin-shell { flex-direction: column; }
  .admin-nav-toggle { display: inline-block; }
  #admin-nav { width: 100%; border-right: none; border-bottom: 2px solid var(--border-dark); display: none; }
  #admin-nav.nav-open { display: block; }
  #admin-nav ul li a { padding: 10px 14px; }
  #admin-main { padding: 8px; }
  .admin-table { display: block; overflow-x: auto; }
  .editor-layout { flex-direction: column; }
}


/* ── Palette overrides (from Settings → Colour Palette) ── */
:root {
  --desktop-bg: #f9f06b;
  --window-bg: #c0c0c0;
  --titlebar-bg: #c061cb;
  --titlebar-bg-end: #2D1B6B;
  --titlebar-text: #ffffff;
  --text-color: #000000;
  --link-color: #986a44;
  --accent-color: #9141ac;
  --content-bg: #ffffff;
  --footer-bg: #cdab8f;
}