/*
 * Wiki Knowledge Base - Main Stylesheet
 * ========================================
 * Design tokens are defined as CSS custom properties in :root.
 * Layout and component styles are extracted from design pages.
 */

/* ================================================================
   1. BASE RESET & TYPOGRAPHY
   ================================================================ */

* { box-sizing: border-box; }

body {
  font-family: var(--wiki-font-sans);
  background: var(--wiki-background);
  color: var(--wiki-foreground);
  line-height: var(--wiki-leading-normal);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ================================================================
   2. UTILITY CLASSES
   ================================================================ */

.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

.wiki-protect {
  -webkit-user-select: text;
  user-select: text;
}

/* ================================================================
   3. LAYOUT - Header
   ================================================================ */

.wiki-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--wiki-header-height);
  background: var(--wiki-header-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--wiki-header-border);
  z-index: var(--wiki-z-header);
  display: flex;
  align-items: center;
  padding: 0 var(--wiki-space-6);
}

.hdr-logo {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  font-weight: 700;
  font-size: var(--wiki-text-lg);
  color: var(--wiki-brand-700);
  text-decoration: none;
  margin-right: var(--wiki-space-6);
  transition: opacity var(--wiki-transition-fast);
}
.hdr-logo:hover { opacity: 0.85; }

.hdr-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-neutral-500);
  flex: 1;
  min-width: 0;
}
.hdr-breadcrumb a { color: var(--wiki-neutral-500); text-decoration: none; transition: color var(--wiki-transition-fast); }
.hdr-breadcrumb a:hover { color: var(--wiki-brand-600); }
.hdr-breadcrumb .current { color: var(--wiki-neutral-800); font-weight: 500; }
.hdr-sep { color: var(--wiki-neutral-300); }

.hdr-actions {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-3);
}

.hdr-search {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  background: var(--wiki-neutral-100);
  border: 1px solid transparent;
  border-radius: var(--wiki-radius-md);
  padding: 6px var(--wiki-space-3);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-neutral-500);
  width: 240px;
  transition: all var(--wiki-transition-fast);
  cursor: pointer;
}
.hdr-search:hover { background: var(--wiki-neutral-0); border-color: var(--wiki-border); }
.hdr-search:focus-within {
  background: var(--wiki-neutral-0);
  border-color: var(--wiki-ring);
  box-shadow: 0 0 0 3px var(--wiki-brand-100);
}
.hdr-search input {
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--wiki-text-sm);
  color: var(--wiki-foreground);
  width: 100%;
  font-family: var(--wiki-font-sans);
}
.hdr-search input::placeholder { color: var(--wiki-neutral-400); }
.hdr-search-kbd {
  margin-left: auto;
  font-size: 11px;
  color: var(--wiki-neutral-400);
  border: 1px solid var(--wiki-neutral-200);
  padding: 1px 5px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}

.hdr-icon-btn {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--wiki-radius-md);
  color: var(--wiki-neutral-500);
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  position: relative;
  border: none;
  background: none;
  overflow: visible;
}
.hdr-icon-btn:hover { background: var(--wiki-neutral-100); color: var(--wiki-neutral-700); }

.hdr-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--wiki-brand-500), var(--wiki-brand-700));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: var(--wiki-text-sm); font-weight: 600;
  cursor: pointer;
}

.hdr-dot {
  position: absolute; top: 6px; right: 6px;
  width: 8px; height: 8px;
  background: #ef4444; border-radius: 50%;
  border: 2px solid var(--wiki-neutral-0);
}

/* ================================================================
   4. LAYOUT - Sidebar
   ================================================================ */

.wiki-sidebar {
  position: fixed;
  top: var(--wiki-header-height);
  bottom: 0;
  left: 0;
  width: var(--wiki-sidebar-width);
  background: var(--wiki-sidebar-bg);
  border-right: 1px solid var(--wiki-border);
  overflow-y: auto;
  scroll-behavior: auto;
  z-index: var(--wiki-z-sidebar);
  padding: var(--wiki-space-4) 0;
}

/* Sidebar - Exam Switcher */
.exam-switcher {
  margin: 0 var(--wiki-space-4) var(--wiki-space-3);
  padding: var(--wiki-space-2) var(--wiki-space-3);
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-md);
  display: flex; align-items: center; gap: var(--wiki-space-2);
  font-size: var(--wiki-text-sm);
  font-weight: 500;
  color: var(--wiki-neutral-700);
  cursor: pointer;
  background: var(--wiki-neutral-50);
  transition: all var(--wiki-transition-fast);
}
.exam-switcher:hover { border-color: var(--wiki-brand-300); background: var(--wiki-brand-50); }

/* Sidebar - Section Labels */
.sb-label {
  font-size: var(--wiki-text-xs);
  font-weight: 600;
  color: var(--wiki-neutral-400);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--wiki-space-3) var(--wiki-space-4) var(--wiki-space-2);
  display: flex; align-items: center; gap: var(--wiki-space-2);
}

/* Sidebar - Items */
.sb-item {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  padding: 8px var(--wiki-space-4);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-sidebar-text);
  border-radius: 0;
  cursor: pointer;
  transition: background var(--wiki-transition-fast), color var(--wiki-transition-fast);
  text-decoration: none;
  position: relative;
  line-height: 1.4;
}
.sb-item:hover { background: var(--wiki-sidebar-hover); color: var(--wiki-neutral-800); }
.sb-item.active {
  background: var(--wiki-sidebar-active);
  color: var(--wiki-sidebar-text-active);
  font-weight: 600;
}
.sb-item.active::before {
  content: '';
  position: absolute; left: 0; top: 4px; bottom: 4px;
  width: 3px;
  background: var(--wiki-sidebar-active-border);
  border-radius: 0 2px 2px 0;
}

/* Sidebar - Chapter */
.sb-chapter {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  padding: 10px var(--wiki-space-4);
  font-size: var(--wiki-text-sm);
  font-weight: 500;
  color: var(--wiki-neutral-600);
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  position: relative;
  border-left: 2px solid transparent;
}
.sb-chapter:hover { 
  background: var(--wiki-neutral-50); 
  border-left-color: var(--wiki-neutral-300);
  color: var(--wiki-neutral-800);
}
.sb-chapter.active { 
  color: var(--wiki-brand-700); 
  background: var(--wiki-brand-50); 
  border-left-color: var(--wiki-brand-500);
  font-weight: 600;
}
.sb-chapter.active::before {
  content: '';
  position: absolute; left: 0; top: 4px; bottom: 4px;
  width: 3px;
  background: var(--wiki-brand-600);
  border-radius: 0 2px 2px 0;
}

/* Sidebar - Knowledge Point (sub-item) */
.sb-kp {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  padding: 6px var(--wiki-space-4) 6px calc(var(--wiki-space-4) + 24px);
  font-size: var(--wiki-text-xs);
  color: var(--wiki-neutral-500);
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  text-decoration: none;
  line-height: 1.4;
  border-left: 2px solid transparent;
}
.sb-kp:hover { 
  background: var(--wiki-sidebar-hover); 
  color: var(--wiki-neutral-700); 
  border-left-color: var(--wiki-neutral-300);
}
.sb-kp.done { color: var(--wiki-neutral-500); }
.sb-kp.current {
  background: var(--wiki-brand-50);
  color: var(--wiki-brand-700);
  font-weight: 600;
  border-left-color: var(--wiki-brand-500);
  box-shadow: inset 2px 0 0 var(--wiki-brand-500);
}

/* Sidebar - Misc */
.sb-divider { height: 1px; background: var(--wiki-border); margin: var(--wiki-space-3) var(--wiki-space-4); }
.sb-count {
  margin-left: auto;
  font-size: 11px;
  color: var(--wiki-neutral-400);
  font-weight: 400;
  background: var(--wiki-neutral-100);
  padding: 1px 6px;
  border-radius: var(--wiki-radius-full);
}
.sb-chevron {
  margin-left: auto;
  transition: transform var(--wiki-transition-fast);
  color: var(--wiki-neutral-400);
}
.sb-chevron.open { transform: rotate(90deg); }
.sb-lock { color: var(--wiki-neutral-300); }
.sb-badge-done {
  width: 16px; height: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--state-success);
  flex-shrink: 0;
}
.sb-badge-pending {
  width: 16px; height: 16px;
  border: 1.5px solid var(--wiki-neutral-300);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Sidebar - Close button (mobile) */
.sb-close {
  display: none;
  position: absolute;
  top: var(--wiki-space-3);
  right: var(--wiki-space-3);
  width: 32px; height: 32px;
  border-radius: var(--wiki-radius-md);
  background: var(--wiki-neutral-100);
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--wiki-neutral-500);
  z-index: 10;
}

/* ================================================================
   5. LAYOUT - Main Content Area
   ================================================================ */

.wiki-layout {
  display: flex;
  min-height: 100vh;
}

.wiki-main {
margin-left: var(--wiki-sidebar-width);
margin-top: var(--wiki-header-height);
flex: 1;
min-width: 0;
padding: var(--wiki-space-8) var(--wiki-space-8) var(--wiki-space-11);
position: relative;
z-index: 2;
}

.wiki-main-inner {
  max-width: var(--wiki-content-max-width);
  margin: 0 auto;
}

/* Page Breadcrumb (shared component) */
.page-breadcrumb {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-neutral-500);
  margin-bottom: var(--wiki-space-6);
  flex-wrap: wrap;
}
.page-breadcrumb a { color: var(--wiki-neutral-500); text-decoration: none; transition: color var(--wiki-transition-fast); }
.page-breadcrumb a:hover { color: var(--wiki-brand-600); }
.page-breadcrumb .sep { color: var(--wiki-neutral-300); }

/* ================================================================
   6. WATERMARK
   ================================================================ */

.wiki-watermark {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: var(--wiki-z-watermark);
  overflow: hidden;
  user-select: none;
}
.wiki-watermark-text {
  position: absolute;
  font-size: 14px;
  color: var(--wiki-neutral-900);
  opacity: var(--wiki-watermark-opacity);
  transform: rotate(-20deg);
  white-space: nowrap;
  font-weight: 500;
  letter-spacing: 2px;
}

/* ================================================================
   6.5. CONTENT BODY STYLES (shared for all detail pages)
   ================================================================ */

.wiki-content-body {
  font-size: var(--wiki-text-base);
  line-height: var(--wiki-leading-relaxed);
  color: var(--wiki-neutral-800);
  /* Content protection: disable text selection */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  /* Disable drag of content elements */
  -webkit-user-drag: none;
}
.wiki-content-body h1 { font-size: var(--wiki-text-2xl); font-weight: 700; margin-top: var(--wiki-space-7); margin-bottom: var(--wiki-space-4); }
.wiki-content-body h2 { font-size: var(--wiki-text-xl); font-weight: 600; margin-top: var(--wiki-space-7); margin-bottom: var(--wiki-space-3); padding-bottom: var(--wiki-space-2); border-bottom: 1px solid var(--wiki-border); }
.wiki-content-body h3 { font-size: var(--wiki-text-lg); font-weight: 600; margin-top: var(--wiki-space-6); margin-bottom: var(--wiki-space-2); }
.wiki-content-body h4 { font-size: var(--wiki-text-base); font-weight: 600; margin-top: var(--wiki-space-5); margin-bottom: var(--wiki-space-2); }
.wiki-content-body p { margin-bottom: var(--wiki-space-4); }
.wiki-content-body ul, .wiki-content-body ol { margin-bottom: var(--wiki-space-4); padding-left: var(--wiki-space-6); }
.wiki-content-body li { margin-bottom: var(--wiki-space-2); }
.wiki-content-body strong { color: var(--wiki-neutral-900); font-weight: 600; }
.wiki-content-body blockquote { border-left: 3px solid var(--wiki-brand-400); background: var(--wiki-brand-50); padding: var(--wiki-space-3) var(--wiki-space-5); border-radius: 0 var(--wiki-radius-md) var(--wiki-radius-md) 0; margin-bottom: var(--wiki-space-4); }
.wiki-content-body blockquote p { margin-bottom: 0; }
.wiki-content-body table { width: 100%; border-collapse: collapse; margin-bottom: var(--wiki-space-4); }
.wiki-content-body th, .wiki-content-body td { border: 1px solid var(--wiki-border); padding: var(--wiki-space-2) var(--wiki-space-3); text-align: left; }
.wiki-content-body th { background: var(--wiki-neutral-100); font-weight: 600; }
.wiki-content-body tr:nth-child(even) { background: var(--wiki-neutral-50); }
.wiki-content-body hr { border: none; border-top: 1px solid var(--wiki-border); margin: var(--wiki-space-5) 0; }
.wiki-content-body code { font-family: var(--wiki-font-mono); font-size: 0.9em; background: var(--wiki-neutral-100); padding: 2px 6px; border-radius: 4px; color: var(--wiki-brand-700); }
.wiki-content-body pre { background: var(--wiki-neutral-900); color: var(--wiki-neutral-100); padding: var(--wiki-space-4); border-radius: var(--wiki-radius-md); overflow-x: auto; margin-bottom: var(--wiki-space-4); }
.wiki-content-body pre code { background: none; color: inherit; padding: 0; }
.wiki-content-body a { color: var(--wiki-brand-600); text-decoration: none; }
.wiki-content-body a:hover { text-decoration: underline; }
.wiki-content-body .katex-display { text-align: center; margin: var(--wiki-space-4) 0; overflow-x: auto; }
.wiki-content-body .kb-wikilink { color: var(--wiki-brand-600); text-decoration: none; border-bottom: 1px dashed var(--wiki-brand-300); }
.wiki-content-body .kb-wikilink:hover { color: var(--wiki-brand-800); border-bottom-style: solid; }
.wiki-content-body .kb-broken-link { color: var(--wiki-neutral-400); text-decoration: line-through; cursor: not-allowed; }

/* ================================================================
   7. CONTENT TYPE BADGES
   ================================================================ */

.type-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--wiki-radius-sm);
  flex-shrink: 0;
  white-space: nowrap;
}
.type-badge[data-type="kp"]       { background: var(--type-kp-bg);       color: var(--type-kp); }
.type-badge[data-type="formula"]  { background: var(--type-formula-bg);  color: var(--type-formula); }
.type-badge[data-type="concept"]  { background: var(--type-concept-bg);  color: var(--type-concept); }
.type-badge[data-type="cmp"]      { background: var(--type-cmp-bg);      color: var(--type-cmp); }
.type-badge[data-type="memory"]   { background: var(--type-memory-bg);   color: var(--type-memory); }
.type-badge[data-type="strategy"] { background: var(--type-strategy-bg); color: var(--type-strategy); }
.type-badge[data-type="practice"] { background: var(--type-practice-bg); color: var(--type-practice); }

/* ================================================================
   8. BUTTONS
   ================================================================ */

.wiki-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wiki-space-2);
  height: 44px;
  padding: 0 var(--wiki-space-6);
  border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.wiki-btn-primary {
  background: var(--wiki-primary);
  color: var(--wiki-primary-foreground);
  box-shadow: 0 2px 6px color-mix(in srgb, var(--wiki-primary) 25%, transparent);
}
.wiki-btn-primary:hover {
  background: var(--wiki-brand-600);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--wiki-primary) 30%, transparent);
}

.wiki-btn-outline {
  background: var(--wiki-card);
  color: var(--wiki-foreground);
  border: 1px solid var(--wiki-border);
}
.wiki-btn-outline:hover {
  background: var(--wiki-muted);
  border-color: var(--wiki-neutral-300);
}

.wiki-btn-warning {
  background: var(--state-warning);
  color: white;
  box-shadow: 0 2px 6px color-mix(in srgb, var(--state-warning) 25%, transparent);
}
.wiki-btn-warning:hover {
  background: #b45309;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--state-warning) 30%, transparent);
}

/* ================================================================
   9. AUTH PAGES (Login)
   ================================================================ */

.wiki-auth-input {
  height: 48px;
  border-radius: var(--wiki-radius-md, 8px);
  border: 1px solid var(--wiki-input);
  background: var(--wiki-card);
  color: var(--wiki-foreground);
  transition: border-color var(--wiki-transition-fast), box-shadow var(--wiki-transition-fast);
}
.wiki-auth-input::placeholder {
  color: var(--wiki-neutral-400);
}
.wiki-auth-input:focus {
  outline: none;
  border-color: var(--wiki-ring);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--wiki-ring) 15%, transparent);
}

.wiki-auth-btn {
  height: 48px;
  border-radius: var(--wiki-radius-md, 8px);
  background: var(--wiki-primary);
  color: var(--wiki-primary-foreground);
  border: none;
  box-shadow: 0 2px 6px color-mix(in srgb, var(--wiki-primary) 25%, transparent);
  transition: background var(--wiki-transition-fast), transform var(--wiki-transition-fast), box-shadow var(--wiki-transition-fast);
}
.wiki-auth-btn:hover {
  background: var(--wiki-brand-600);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--wiki-primary) 30%, transparent);
}
.wiki-auth-btn:active {
  transform: scale(0.99);
}

/* ================================================================
   10. INDEX PAGE - Cards
   ================================================================ */

.wiki-nav {
  position: sticky;
  top: 0;
  z-index: var(--wiki-z-header);
  height: var(--wiki-header-height);
  background: var(--wiki-header-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--wiki-header-border);
}
.wiki-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--wiki-space-6);
  padding: 0 var(--wiki-space-7);
}

.wiki-logo {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  font-size: var(--wiki-text-lg);
  font-weight: 700;
  color: var(--wiki-primary);
  flex-shrink: 0;
  cursor: pointer;
  transition: opacity var(--wiki-transition-fast);
}
.wiki-logo:hover { opacity: 0.85; }

.wiki-search {
  flex: 1;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  display: flex;
  align-items: center;
}
.wiki-search input {
  width: 100%;
  height: 40px;
  padding: 0 var(--wiki-space-4) 0 40px;
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-full);
  background: var(--wiki-neutral-0);
  font-size: var(--wiki-text-sm);
  font-family: var(--wiki-font-sans);
  color: var(--wiki-foreground);
  outline: none;
  transition: border-color var(--wiki-transition-fast), box-shadow var(--wiki-transition-fast);
}
.wiki-search input::placeholder { color: var(--wiki-neutral-400); }
.wiki-search input:hover { border-color: var(--wiki-neutral-300); }
.wiki-search input:focus {
  border-color: var(--wiki-primary);
  box-shadow: 0 0 0 3px var(--wiki-brand-100);
}

.wiki-main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--wiki-space-9) var(--wiki-space-7) var(--wiki-space-11);
}

.wiki-welcome h1 {
  font-size: var(--wiki-text-4xl);
  font-weight: 700;
  color: var(--wiki-foreground);
  margin: 0 0 var(--wiki-space-2) 0;
  letter-spacing: -0.02em;
  line-height: var(--wiki-leading-tight);
}
.wiki-welcome p {
  font-size: var(--wiki-text-base);
  color: var(--wiki-muted-foreground);
  margin: 0;
}

.wiki-section-title {
  font-size: var(--wiki-text-xl);
  font-weight: 600;
  color: var(--wiki-neutral-800);
  margin: 0 0 var(--wiki-space-5) 0;
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
}
.wiki-section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--wiki-primary);
  border-radius: 2px;
}

.wiki-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--wiki-space-5);
}

.wiki-exam-card {
  background: var(--wiki-card);
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--wiki-transition-normal), box-shadow var(--wiki-transition-normal), border-color var(--wiki-transition-normal);
  display: flex;
  flex-direction: column;
}
.wiki-exam-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--wiki-shadow-lg);
  border-color: var(--wiki-brand-200);
}

.wiki-card-icon {
  height: 120px;
  background: linear-gradient(135deg, var(--wiki-brand-500) 0%, var(--wiki-brand-700) 50%, var(--wiki-brand-900) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.wiki-card-icon::after {
  content: '';
  position: absolute;
  top: -30px; right: -30px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.wiki-card-icon::before {
  content: '';
  position: absolute;
  bottom: -40px; left: -20px;
  width: 100px; height: 100px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}

.wiki-card-body {
  padding: var(--wiki-space-5) var(--wiki-space-6) var(--wiki-space-6);
  display: flex;
  flex-direction: column;
  gap: var(--wiki-space-4);
  flex: 1;
}
.wiki-card-body h3 {
  font-size: var(--wiki-text-xl);
  font-weight: 600;
  color: var(--wiki-foreground);
  margin: 0;
  line-height: var(--wiki-leading-snug);
}

.wiki-card-stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--wiki-space-2);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-muted-foreground);
}
.wiki-dot {
  color: var(--wiki-neutral-300);
  font-weight: 300;
}

.wiki-progress-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--wiki-space-2);
}
.wiki-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--wiki-neutral-100);
  border-radius: var(--wiki-radius-full);
  overflow: hidden;
}
.wiki-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--wiki-brand-500), var(--wiki-primary));
  border-radius: var(--wiki-radius-full);
  transition: width var(--wiki-transition-slow);
}
.wiki-progress-text {
  font-size: var(--wiki-text-xs);
  color: var(--wiki-neutral-500);
}

.wiki-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--wiki-space-1);
  margin-top: auto;
  padding-top: var(--wiki-space-2);
  font-size: var(--wiki-text-sm);
  font-weight: 600;
  color: var(--wiki-primary);
  text-decoration: none;
  transition: gap var(--wiki-transition-fast), color var(--wiki-transition-fast);
  align-self: flex-start;
}
.wiki-card-cta:hover {
  gap: var(--wiki-space-2);
  color: var(--wiki-brand-800);
}

.wiki-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--wiki-space-7) var(--wiki-space-7);
  border-top: 1px solid var(--wiki-border);
  text-align: center;
}
.wiki-footer p {
  font-size: var(--wiki-text-sm);
  color: var(--wiki-neutral-400);
  margin: 0;
}

/* ================================================================
   11. ERROR PAGES (404 / No Access)
   ================================================================ */

.wiki-error-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--wiki-header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--wiki-space-6);
  z-index: var(--wiki-z-header);
  background: var(--wiki-header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--wiki-header-border);
}
.wiki-error-header .logo-area {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-3);
}
.wiki-error-header .logo-icon {
  width: 32px; height: 32px;
  border-radius: var(--wiki-radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--wiki-brand-50);
}
.wiki-error-header .logo-text {
  font-size: var(--wiki-text-base);
  font-weight: 600;
  color: var(--wiki-foreground);
}

.wiki-error-section {
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--wiki-space-10) var(--wiki-space-6);
}
.wiki-error-card {
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.wiki-error-icon-wrap {
  width: 96px; height: 96px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--wiki-space-6);
}
.wiki-error-icon-wrap.amber { background: var(--state-warning-bg); }
.wiki-error-icon-wrap.red   { background: var(--state-error-bg); }

.wiki-error-title {
  font-size: 28px;
  font-weight: 700;
  line-height: var(--wiki-leading-tight);
  margin-bottom: var(--wiki-space-3);
}
.wiki-error-title.amber { color: var(--state-warning); }
.wiki-error-title.red   { color: var(--state-error); }

.wiki-error-desc {
  font-size: var(--wiki-text-base);
  color: var(--wiki-neutral-600);
  line-height: var(--wiki-leading-relaxed);
  margin-bottom: var(--wiki-space-6);
  max-width: 400px;
}

.wiki-error-info-card {
  width: 100%;
  background: var(--wiki-card);
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-md);
  padding: var(--wiki-space-4);
  margin-bottom: var(--wiki-space-6);
  text-align: left;
}
.wiki-error-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--wiki-space-2) 0;
  font-size: var(--wiki-text-sm);
}
.wiki-error-info-row + .wiki-error-info-row {
  border-top: 1px solid var(--wiki-neutral-100);
}
.wiki-error-info-label { color: var(--wiki-muted-foreground); }
.wiki-error-info-value { color: var(--wiki-foreground); font-weight: 500; }

.wiki-error-btns {
  display: flex;
  gap: var(--wiki-space-3);
  width: 100%;
  flex-wrap: wrap;
  justify-content: center;
}

/* 404 page specific */
.wiki-404-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--wiki-space-10) var(--wiki-space-6);
  position: relative;
  overflow: hidden;
}
.wiki-404-bg-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.03;
  z-index: 0;
}
.wiki-404-bg-pattern svg {
  position: absolute;
  color: var(--wiki-brand-600);
}
.wiki-404-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 480px;
  width: 100%;
}
.wiki-404-number {
  font-size: 120px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -4px;
  background: linear-gradient(135deg, var(--wiki-brand-200) 0%, var(--wiki-brand-400) 50%, var(--wiki-brand-300) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--wiki-space-2);
  user-select: none;
}
.wiki-404-icon-wrap {
  width: 72px; height: 72px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--wiki-neutral-100);
  margin-bottom: var(--wiki-space-6);
}
.wiki-404-title {
  font-size: var(--wiki-text-3xl);
  font-weight: 700;
  color: var(--wiki-foreground);
  margin-bottom: var(--wiki-space-3);
  line-height: var(--wiki-leading-tight);
}
.wiki-404-desc {
  font-size: var(--wiki-text-base);
  color: var(--wiki-neutral-500);
  line-height: var(--wiki-leading-relaxed);
  margin-bottom: var(--wiki-space-8);
  max-width: 380px;
}
.wiki-404-actions {
  display: flex;
  flex-direction: column;
  gap: var(--wiki-space-4);
  width: 100%;
  max-width: 360px;
  align-items: center;
}
.wiki-404-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--wiki-space-2);
  height: 48px;
  padding: 0 var(--wiki-space-8);
  border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  border: none;
  text-decoration: none;
  background: var(--wiki-primary);
  color: var(--wiki-primary-foreground);
  width: 100%;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--wiki-primary) 25%, transparent);
}
.wiki-404-btn-primary:hover {
  background: var(--wiki-brand-600);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--wiki-primary) 30%, transparent);
  transform: translateY(-1px);
}
.wiki-404-search-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--wiki-space-2);
  height: 48px;
  padding: 0 var(--wiki-space-5);
  border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--wiki-transition-fast);
  background: var(--wiki-card);
  color: var(--wiki-foreground);
  border: 1px solid var(--wiki-border);
  width: 100%;
  text-decoration: none;
}
.wiki-404-search-btn:hover {
  background: var(--wiki-muted);
  border-color: var(--wiki-neutral-300);
}
.wiki-404-search-btn .search-placeholder {
  color: var(--wiki-neutral-400);
  font-weight: 400;
}
.wiki-404-link {
  display: inline-flex;
  align-items: center;
  gap: var(--wiki-space-1);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-primary);
  text-decoration: none;
  padding: var(--wiki-space-2) var(--wiki-space-3);
  border-radius: var(--wiki-radius-sm);
  transition: all var(--wiki-transition-fast);
  margin-top: var(--wiki-space-2);
}
.wiki-404-link:hover {
  background: var(--wiki-brand-50);
  color: var(--wiki-brand-800);
}
.wiki-404-tip {
  margin-top: var(--wiki-space-8);
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  font-size: var(--wiki-text-xs);
  color: var(--wiki-neutral-400);
}

/* ================================================================
   12. ADMIN LAYOUT
   ================================================================ */

.admin-sidebar {
  width: 260px;
  min-width: 260px;
  background: #0f172a;
  color: #e2e8f0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 90;
}
.admin-sidebar-brand {
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  border-bottom: 1px solid #1e293b;
  flex-shrink: 0;
}
.admin-sidebar-brand-icon {
  width: 36px; height: 36px;
  background: #2563eb;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  margin-right: 12px;
  flex-shrink: 0;
}
.admin-sidebar-brand-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}
.admin-sidebar-brand-sub {
  font-size: 11px;
  color: #94a3b8;
  line-height: 1.3;
  margin-top: 2px;
}
.admin-sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 10px;
}
.admin-sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.admin-sidebar-nav li a {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 8px;
  color: #cbd5e1;
  text-decoration: none;
  font-size: 14px;
  gap: 12px;
  transition: all 150ms;
}
.admin-sidebar-nav li a:hover {
  background: #1e293b;
}
.admin-sidebar-nav li a.active {
  background: #2563eb;
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}
.admin-sidebar-divider {
  height: 1px;
  background: #1e293b;
  margin: 12px 14px;
}
.admin-sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid #1e293b;
  flex-shrink: 0;
  font-size: 11px;
  color: #475569;
}

.admin-topbar {
  height: 64px;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 80;
  flex-shrink: 0;
}
.admin-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.admin-main {
  flex: 1;
  padding: 28px 32px;
  overflow-x: auto;
  background: #f8fafc;
}

/* ================================================================
   13. MOBILE OVERLAY & RESPONSIVE
   ================================================================ */

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: calc(var(--wiki-z-sidebar) - 1);
  opacity: 0;
  transition: opacity var(--wiki-transition-normal);
}
.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

.hamburger-btn {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--wiki-neutral-600);
  border-radius: var(--wiki-radius-md);
  transition: background var(--wiki-transition-fast);
}
.hamburger-btn:hover { background: var(--wiki-neutral-100); }

@media (max-width: 1024px) {
  .wiki-sidebar {
    transform: translateX(-100%);
    transition: transform var(--wiki-transition-normal);
    width: 280px;
    max-width: 85vw;
    box-shadow: var(--wiki-shadow-lg);
  }
  .wiki-sidebar.open {
    transform: translateX(0);
  }
  .wiki-main {
    margin-left: 0;
  }
  .hdr-search { width: 180px; }
  .hamburger-btn { display: flex; }
  .sb-close { display: flex; }
}

@media (max-width: 768px) {
  .wiki-nav-inner {
    padding: 0 var(--wiki-space-4);
    gap: var(--wiki-space-3);
  }
  .wiki-logo span { display: none; }
  .wiki-user span { display: none; }
  .wiki-search { max-width: 100%; }
  .wiki-main-content {
    padding: var(--wiki-space-7) var(--wiki-space-4) var(--wiki-space-9);
  }
  .wiki-welcome h1 { font-size: var(--wiki-text-3xl); }
  .wiki-cards-grid { grid-template-columns: 1fr; }
  .wiki-footer { padding: var(--wiki-space-5) var(--wiki-space-4); }
  /* Mobile header adjustments */
  .wiki-header { padding: 0 var(--wiki-space-3); }
  .hdr-logo { margin-right: var(--wiki-space-2); font-size: var(--wiki-text-base); }
  .hdr-logo span { display: none; }
  .hdr-breadcrumb { font-size: var(--wiki-text-xs); }
  .hdr-actions { gap: var(--wiki-space-1); }
  .hdr-icon-btn { width: 32px; height: 32px; }
  .hdr-avatar { width: 28px; height: 28px; font-size: var(--wiki-text-xs); }
  /* Show username initial only on mobile */
  .hdr-avatar > span { display: none; }
  .hdr-avatar > div { width: 28px; height: 28px; }
}

@media (max-width: 640px) {
  .wiki-main { padding: var(--wiki-space-5) var(--wiki-space-3); }
  .hdr-search { display: none; }
  /* Ensure sidebar items have proper text layout on mobile */
  .wiki-sidebar { width: 260px; }
  .sb-item { padding: 10px var(--wiki-space-4); font-size: var(--wiki-text-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .sb-item span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; min-width: 0; }
  .sb-chapter { padding: 10px var(--wiki-space-4); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .sb-chapter span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; min-width: 0; }
  .sb-kp { padding: 6px var(--wiki-space-4) 6px calc(var(--wiki-space-4) + 24px); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .exam-switcher { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .exam-switcher > div > span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  /* Notification dropdown full width on mobile */
  .notif-dropdown { width: 320px; max-width: calc(100vw - 32px); right: -8px; }
  /* User dropdown full width on mobile */
  .dropdown-menu { min-width: 160px; }
  /* Breadcrumb: horizontal scroll on mobile instead of vertical stacking */
  .page-breadcrumb {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: var(--wiki-space-1);
    padding-bottom: 2px;
  }
  .page-breadcrumb::-webkit-scrollbar { display: none; }
  .page-breadcrumb a,
  .page-breadcrumb > span:not(.sep) {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 0;
    max-width: 120px;
  }
  .page-breadcrumb .sep { flex-shrink: 0; }
}
}

@media (max-width: 480px) {
  .wiki-welcome h1 { font-size: var(--wiki-text-2xl); }
  .wiki-card-icon { height: 100px; }
  .wiki-404-number { font-size: 80px; }
  .wiki-error-btns { flex-direction: column; }
  .wiki-error-btns .wiki-btn { width: 100%; }
}

/* ================================================================
   14. DROPDOWN MENU
   ================================================================ */

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--wiki-card);
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-md);
  box-shadow: var(--wiki-shadow-lg);
  min-width: 180px;
  padding: var(--wiki-space-1) 0;
  z-index: var(--wiki-z-dropdown);
}
.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  padding: 8px var(--wiki-space-4);
  font-size: var(--wiki-text-sm);
  color: var(--wiki-neutral-600);
  cursor: pointer;
  transition: background var(--wiki-transition-fast), color var(--wiki-transition-fast);
  text-decoration: none;
}
.dropdown-item:hover {
  background: var(--wiki-neutral-50);
  color: var(--wiki-foreground);
}
.dropdown-divider {
  height: 1px;
  background: var(--wiki-border);
  margin: var(--wiki-space-1) 0;
}

/* ================================================================
   15. PRACTICE / QUIZ PAGE
   ================================================================ */

/* Back to KP link */
.quiz-back-row { margin-bottom: var(--wiki-space-3); }
.quiz-back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--wiki-brand-600); text-decoration: none; font-size: var(--wiki-text-sm); font-weight: 500;
  padding: 6px 0; transition: all var(--wiki-transition-fast);
}
.quiz-back-link:hover { color: var(--wiki-brand-700); gap: 8px; }
.quiz-back-icon { width: 16px; height: 16px; }

/* Associated KP Info Bar */
.quiz-kp-bar {
  display: flex; align-items: center; gap: var(--wiki-space-2); flex-wrap: wrap;
  background: var(--wiki-neutral-100); border-radius: var(--wiki-radius-md);
  padding: 8px 12px; margin-bottom: var(--wiki-space-5);
  font-size: var(--wiki-text-sm);
}
.quiz-kp-bar-label { color: var(--wiki-neutral-600); }
.quiz-kp-bar-link {
  color: var(--wiki-brand-600); font-weight: 600; text-decoration: none;
  transition: color var(--wiki-transition-fast);
}
.quiz-kp-bar-link:hover { color: var(--wiki-brand-700); text-decoration: underline; }
.quiz-kp-bar-sep { color: var(--wiki-neutral-300); }
.quiz-kp-bar-chapter { color: var(--wiki-neutral-500); font-size: var(--wiki-text-xs); }

/* Quiz Card */
.quiz-card {
  background: var(--wiki-card); border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg); padding: var(--wiki-space-6);
  position: relative; overflow: hidden;
  box-shadow: var(--wiki-shadow-sm); margin-bottom: var(--wiki-space-5);
}
.quiz-card-accent {
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--type-practice), #fbbf24);
}

/* Meta Row */
.quiz-meta-row {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--wiki-space-3); margin-bottom: var(--wiki-space-5);
  padding-bottom: var(--wiki-space-4); border-bottom: 1px solid var(--wiki-border);
}
.quiz-meta-left { display: flex; align-items: center; gap: var(--wiki-space-3); flex-wrap: wrap; }
.quiz-meta-right { flex-shrink: 0; }

.wiki-type-badge {
  display: inline-flex; align-items: center; padding: 3px 10px; font-size: 12px; font-weight: 600;
  border-radius: var(--wiki-radius-full); white-space: nowrap;
}
.wiki-type-badge--practice { background: var(--type-practice-bg); color: var(--type-practice); }

.quiz-difficulty { display: inline-flex; align-items: center; gap: 1px; }
.quiz-star { width: 13px; height: 13px; color: var(--wiki-neutral-300); }
.quiz-star--filled { color: var(--wiki-star); fill: var(--wiki-star); }
.quiz-difficulty-text { font-size: var(--wiki-text-xs); color: var(--wiki-muted-foreground); margin-left: 6px; }

.quiz-tag {
  display: inline-block; padding: 2px 8px; font-size: 11px;
  background: var(--wiki-neutral-100); color: var(--wiki-neutral-600);
  border-radius: var(--wiki-radius-full); font-weight: 500;
}

.quiz-counter { font-size: var(--wiki-text-xs); color: var(--wiki-neutral-500); }
.quiz-counter strong { color: var(--wiki-foreground); font-weight: 700; }

/* Question Block */
.quiz-question-block { margin-bottom: var(--wiki-space-5); }
.quiz-type-row { margin-bottom: var(--wiki-space-3); }
.quiz-type-badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  font-size: var(--wiki-text-xs); font-weight: 600; border-radius: var(--wiki-radius-sm);
}
.quiz-type-badge--single { background: var(--state-info-bg); color: var(--state-info); }
.quiz-type-badge--multi { background: var(--type-strategy-bg); color: var(--type-strategy); }
.quiz-type-badge--judge { background: var(--type-practice-bg); color: var(--type-practice); }

/* Submit Button */
.quiz-submit-row { display: flex; justify-content: center; margin-bottom: var(--wiki-space-5); }
.quiz-submit-btn {
  display: inline-flex; align-items: center; gap: var(--wiki-space-2);
  padding: 12px 32px; border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-base); font-weight: 600; cursor: pointer;
  border: none; font-family: inherit;
  background: var(--wiki-brand-600); color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
  transition: all var(--wiki-transition-fast);
}
.quiz-submit-btn:hover { background: var(--wiki-brand-700); box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4); transform: translateY(-1px); }
.quiz-submit-btn:active { transform: translateY(0); }
.quiz-submit-icon { width: 18px; height: 18px; }

/* Answer Banner Variants */
.answer-banner--wrong {
  background: linear-gradient(135deg, var(--state-error-bg), #fecaca);
  border-color: #fca5a5;
}
.answer-banner--wrong .answer-banner-icon { color: var(--state-error); }
.answer-banner--wrong .answer-banner-label { color: var(--state-error); background: rgba(220, 38, 38, 0.12); }
.answer-banner--wrong .answer-banner-value { color: #991b1b; }

/* Warning Callout (for easy-wrong notes) */
.wiki-callout--warning { background: var(--state-warning-bg); border-color: #fcd34d; }
.wiki-callout--warning .wiki-callout-icon { color: var(--state-warning); }
.wiki-callout--warning .wiki-callout-title { color: #92400e; }

/* Question Container */
.quiz-question-container { margin-bottom: var(--wiki-space-5); }

/* Source tag in practice list */
.kb-pq-source { font-size: 11px; color: var(--wiki-neutral-500); font-weight: 500; }
.kb-pq-easywrong { font-size: 11px; color: var(--state-error); font-weight: 600; }

.quiz-stem {
  font-size: var(--wiki-text-lg); line-height: var(--wiki-leading-relaxed);
  color: var(--wiki-neutral-900); font-weight: 500; margin: 0;
}

/* Options */
.quiz-options { display: flex; flex-direction: column; gap: var(--wiki-space-3); margin-bottom: var(--wiki-space-5); }
.quiz-option {
  display: flex; align-items: center; gap: var(--wiki-space-3);
  padding: 14px 16px; border: 2px solid var(--wiki-border);
  border-radius: var(--wiki-radius-md); cursor: pointer;
  transition: all var(--wiki-transition-fast); position: relative;
  background: var(--wiki-neutral-0);
}
.quiz-option:hover { border-color: var(--wiki-brand-300); }
.quiz-option--correct, .quiz-option--wrong { cursor: default; }
.quiz-radio { display: none; }
.quiz-option-letter {
  width: 30px; height: 30px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--wiki-neutral-100); color: var(--wiki-neutral-600);
  font-weight: 700; font-size: var(--wiki-text-sm);
  border: 2px solid var(--wiki-neutral-200); transition: all var(--wiki-transition-fast);
}
.quiz-option-text { flex: 1; font-size: var(--wiki-text-base); color: var(--wiki-neutral-800); line-height: var(--wiki-leading-snug); }
.quiz-option-icon { margin-left: auto; flex-shrink: 0; display: flex; align-items: center; }

.quiz-option--selected { border-color: var(--wiki-brand-300); background: var(--wiki-brand-50); }
.quiz-option--selected .quiz-option-letter { background: var(--wiki-brand-500); color: #fff; border-color: var(--wiki-brand-500); }
.quiz-option--correct { border-color: var(--state-success); background: var(--state-success-bg); }
.quiz-option--correct .quiz-option-letter { background: var(--state-success); color: #fff; border-color: var(--state-success); }
.quiz-option--wrong { border-color: var(--state-error); background: var(--state-error-bg); }
.quiz-option--wrong .quiz-option-letter { background: var(--state-error); color: #fff; border-color: var(--state-error); }

.quiz-status-icon { width: 22px; height: 22px; }
.quiz-status-icon--correct { color: var(--state-success); }
.quiz-status-icon--wrong { color: var(--state-error); }

/* Action Buttons */
.quiz-actions { display: flex; align-items: center; justify-content: space-between; }
.quiz-actions-left { display: flex; align-items: center; gap: var(--wiki-space-2); flex-wrap: wrap; }
.quiz-action-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-sm); font-weight: 500; cursor: pointer;
  transition: all var(--wiki-transition-fast); border: 1px solid transparent; font-family: inherit;
  background: transparent; color: var(--wiki-neutral-600);
}
.quiz-action-btn--ghost { background: transparent; color: var(--wiki-neutral-600); border-color: var(--wiki-border); }
.quiz-action-btn--ghost:hover { background: var(--wiki-neutral-100); color: var(--wiki-foreground); border-color: var(--wiki-neutral-300); }
.quiz-action-icon { width: 16px; height: 16px; }

/* Analysis Section */
.analysis-section { margin-top: var(--wiki-space-5); }

/* Answer Banner */
.answer-banner {
  display: flex; align-items: center; gap: var(--wiki-space-3);
  padding: var(--wiki-space-4) var(--wiki-space-5);
  background: linear-gradient(135deg, var(--state-success-bg), #bbf7d0);
  border: 1px solid #86efac; border-radius: var(--wiki-radius-lg);
  margin-bottom: var(--wiki-space-4);
}
.answer-banner-icon { width: 28px; height: 28px; color: var(--state-success); flex-shrink: 0; }
.answer-banner-text { display: flex; align-items: center; gap: var(--wiki-space-3); flex-wrap: wrap; }
.answer-banner-label {
  font-size: var(--wiki-text-sm); color: var(--state-success); font-weight: 600;
  padding: 2px 8px; background: rgba(22,163,74,0.12); border-radius: var(--wiki-radius-sm);
}
.answer-banner-value { font-size: var(--wiki-text-xl); font-weight: 700; color: #15803d; }

/* Stats Card */
.stats-card {
  background: var(--wiki-card); border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg); padding: var(--wiki-space-5);
  margin-bottom: var(--wiki-space-4); box-shadow: var(--wiki-shadow-sm);
}
.stats-header { display: flex; align-items: center; gap: var(--wiki-space-2); margin-bottom: var(--wiki-space-4); }
.stats-header-icon { width: 18px; height: 18px; color: var(--wiki-brand-600); }
.stats-header-title { font-size: var(--wiki-text-sm); font-weight: 600; color: var(--wiki-neutral-700); }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--wiki-space-4); }
.stat-item { display: flex; flex-direction: column; gap: 4px; }
.stat-label { font-size: var(--wiki-text-xs); color: var(--wiki-muted-foreground); }
.stat-value { font-size: var(--wiki-text-sm); font-weight: 600; color: var(--wiki-neutral-800); }
.stat-value--wrong { color: var(--state-error); }

/* Analysis Card */
.analysis-card {
  background: var(--wiki-card); border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg); padding: var(--wiki-space-6);
  margin-bottom: var(--wiki-space-4); box-shadow: var(--wiki-shadow-sm);
}
.analysis-section-title {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  font-size: var(--wiki-text-lg); font-weight: 700; color: var(--wiki-neutral-900);
  margin: 0 0 var(--wiki-space-4); padding-bottom: var(--wiki-space-3);
  border-bottom: 1px solid var(--wiki-border);
}
.analysis-title-icon { width: 20px; height: 20px; color: var(--wiki-brand-600); }
.analysis-body { font-size: var(--wiki-text-base); line-height: var(--wiki-leading-relaxed); color: var(--wiki-neutral-800); }
.analysis-body p { margin-bottom: var(--wiki-space-4); }
.analysis-body strong { color: var(--wiki-neutral-900); font-weight: 600; }
.analysis-body ul, .analysis-body ol { margin: var(--wiki-space-2) 0 var(--wiki-space-3); padding-left: var(--wiki-space-6); }
.analysis-body li { margin-bottom: var(--wiki-space-1); }
.analysis-body h4 { font-size: var(--wiki-text-base); font-weight: 700; color: var(--wiki-neutral-900); margin: var(--wiki-space-5) 0 var(--wiki-space-3); }
.analysis-body blockquote { margin: var(--wiki-space-3) 0; padding: var(--wiki-space-3) var(--wiki-space-4); background: var(--wiki-neutral-50); border-left: 4px solid var(--wiki-brand-300); border-radius: var(--wiki-radius-sm); }
.analysis-body blockquote p { margin: 0; }

/* Strategy Callout */
.wiki-callout {
  border-radius: var(--wiki-radius-lg); padding: var(--wiki-space-5);
  margin-bottom: var(--wiki-space-4); border: 1px solid;
}
.wiki-callout--strategy { background: var(--type-strategy-bg); border-color: #67e8f9; }
.wiki-callout-header { display: flex; align-items: center; gap: var(--wiki-space-2); margin-bottom: var(--wiki-space-3); }
.wiki-callout-icon { width: 20px; height: 20px; color: var(--type-strategy); }
.wiki-callout-title { font-size: var(--wiki-text-base); font-weight: 700; color: #0e7490; }
.wiki-callout-text { font-size: var(--wiki-text-sm); line-height: var(--wiki-leading-relaxed); color: var(--wiki-neutral-800); }
.wiki-callout-text p { margin-bottom: var(--wiki-space-2); }
.strategy-list { margin: var(--wiki-space-2) 0; padding-left: var(--wiki-space-5); }
.strategy-list li { margin-bottom: var(--wiki-space-1); }
.strategy-mnemonic {
  background: rgba(255,255,255,0.7); padding: 10px 14px; border-radius: var(--wiki-radius-md);
  border-left: 3px solid var(--type-strategy); margin-top: var(--wiki-space-3);
  font-weight: 500; color: #0e7490;
}

/* Related Knowledge Points */
.related-kp {
  background: var(--wiki-card); border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg); padding: var(--wiki-space-5);
  margin-bottom: var(--wiki-space-4); box-shadow: var(--wiki-shadow-sm);
}
.related-kp--practice { border-left: 3px solid var(--type-practice); }
.related-kp-title {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  font-size: var(--wiki-text-base); font-weight: 700; color: var(--wiki-neutral-900);
  margin: 0 0 var(--wiki-space-3);
}
.related-kp-icon { width: 18px; height: 18px; color: var(--wiki-brand-600); }
.related-kp--practice .related-kp-icon { color: var(--type-practice); }
.related-kp-list { display: flex; flex-direction: column; gap: 2px; }
.related-kp-link {
  display: flex; align-items: center; gap: var(--wiki-space-2);
  padding: 10px 12px; text-decoration: none; color: var(--wiki-neutral-700);
  border-radius: var(--wiki-radius-md); transition: all var(--wiki-transition-fast);
  font-size: var(--wiki-text-sm);
}
.related-kp-link:hover { background: var(--wiki-neutral-100); color: var(--wiki-brand-600); }
.wiki-kp-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.related-kp-name { flex: 1; }
.related-kp-arrow { width: 14px; height: 14px; color: var(--wiki-neutral-400); margin-left: auto; flex-shrink: 0; }
.related-kp-link:hover .related-kp-arrow { color: var(--wiki-brand-600); }

/* Same-KP practice list items */
.related-kp-link--practice { gap: var(--wiki-space-3); }
.related-kp-qnum {
  font-size: var(--wiki-text-xs); font-weight: 600; color: var(--type-practice);
  background: var(--type-practice-bg); padding: 2px 8px; border-radius: var(--wiki-radius-sm);
  flex-shrink: 0; min-width: 40px; text-align: center;
}
.related-kp-diff { font-size: 11px; color: var(--wiki-star); letter-spacing: 0; flex-shrink: 0; }
.related-kp-link--current { background: var(--type-practice-bg); color: var(--type-practice); font-weight: 500; }
.related-kp-link--current:hover { background: var(--type-practice-bg); color: var(--type-practice); }
.related-kp-current-tag {
  font-size: 10px; background: var(--type-practice); color: #fff;
  padding: 1px 6px; border-radius: var(--wiki-radius-sm); font-weight: 600; flex-shrink: 0;
}

/* Bottom Nav Bar */
.quiz-nav-bar {
  position: sticky; bottom: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--wiki-space-4) var(--wiki-space-5);
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--wiki-border); border-radius: var(--wiki-radius-lg) var(--wiki-radius-lg) 0 0;
  margin-top: var(--wiki-space-5);
  box-shadow: 0 -4px 12px rgba(15,23,42,0.06);
  gap: var(--wiki-space-4); flex-wrap: wrap;
}
.quiz-progress-wrap { flex: 1; min-width: 200px; }
.quiz-progress-info { display: flex; justify-content: space-between; margin-bottom: 6px; }
.quiz-progress-text { font-size: var(--wiki-text-xs); color: var(--wiki-muted-foreground); }
.quiz-progress-count { font-size: var(--wiki-text-xs); font-weight: 600; color: var(--wiki-foreground); }
.quiz-progress-bar { height: 4px; background: var(--wiki-neutral-100); border-radius: var(--wiki-radius-full); overflow: hidden; }
.quiz-progress-fill { height: 100%; background: linear-gradient(90deg, var(--wiki-brand-500), var(--wiki-brand-600)); border-radius: var(--wiki-radius-full); transition: width var(--wiki-transition-normal); }

.quiz-nav-btns { display: flex; align-items: center; gap: var(--wiki-space-2); flex-shrink: 0; }
.quiz-nav-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-sm); font-weight: 500; cursor: pointer;
  transition: all var(--wiki-transition-fast); border: 1px solid var(--wiki-border);
  font-family: inherit; background: var(--wiki-neutral-0); color: var(--wiki-neutral-700);
}
.quiz-nav-btn:hover:not(:disabled) { background: var(--wiki-neutral-100); border-color: var(--wiki-neutral-300); }
.quiz-nav-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.quiz-nav-icon { width: 16px; height: 16px; }
.quiz-nav-btn--prev:hover:not(:disabled) { color: var(--wiki-brand-600); border-color: var(--wiki-brand-300); }
.quiz-nav-btn--next { background: var(--wiki-brand-600); color: #fff; border-color: var(--wiki-brand-600); }
.quiz-nav-btn--next:hover { background: var(--wiki-brand-700); border-color: var(--wiki-brand-700); }
.quiz-nav-btn--grid { background: var(--wiki-neutral-100); }
.quiz-nav-btn--grid:hover { background: var(--wiki-neutral-200); }

/* Question Grid Modal */
.q-grid-overlay {
  position: fixed; inset: 0; z-index: var(--wiki-z-modal);
  background: rgba(15,23,42,0.5); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: var(--wiki-space-4); opacity: 0; pointer-events: none;
  transition: opacity var(--wiki-transition-normal);
}
.q-grid-overlay.q-grid-overlay--visible { opacity: 1; pointer-events: auto; }
.q-grid-popup {
  background: var(--wiki-card); border-radius: var(--wiki-radius-lg);
  width: 100%; max-width: 520px; max-height: 90vh; overflow-y: auto;
  box-shadow: var(--wiki-shadow-xl);
  transform: scale(0.95); transition: transform var(--wiki-transition-normal);
}
.q-grid-overlay.q-grid-overlay--visible .q-grid-popup { transform: scale(1); }
.q-grid-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--wiki-space-5); border-bottom: 1px solid var(--wiki-border);
}
.q-grid-title { font-size: var(--wiki-text-lg); font-weight: 700; color: var(--wiki-foreground); }
.q-grid-close {
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  border: none; background: transparent; border-radius: var(--wiki-radius-md);
  color: var(--wiki-neutral-500); cursor: pointer; transition: all var(--wiki-transition-fast);
}
.q-grid-close:hover { background: var(--wiki-neutral-100); color: var(--wiki-foreground); }
.q-grid-close i { width: 20px; height: 20px; }

.q-grid-legend {
  display: flex; align-items: center; gap: var(--wiki-space-4); flex-wrap: wrap;
  padding: var(--wiki-space-4) var(--wiki-space-5); font-size: var(--wiki-text-xs); color: var(--wiki-neutral-600);
  border-bottom: 1px solid var(--wiki-border);
}
.q-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.q-dot { width: 12px; height: 12px; border-radius: 50%; }
.q-dot--correct { background: var(--state-success); }
.q-dot--wrong { background: var(--state-error); }
.q-dot--current { background: var(--wiki-brand-600); }
.q-dot--unanswered { background: var(--wiki-neutral-300); }

.q-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--wiki-space-2);
  padding: var(--wiki-space-5);
}
.q-num {
  width: 100%; aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--wiki-border); border-radius: var(--wiki-radius-md);
  background: var(--wiki-neutral-0); font-size: var(--wiki-text-sm); font-weight: 600;
  color: var(--wiki-neutral-700); cursor: pointer; transition: all var(--wiki-transition-fast);
  font-family: inherit;
}
.q-num:hover { border-color: var(--wiki-brand-300); background: var(--wiki-brand-50); color: var(--wiki-brand-600); }
.q-num--correct { background: var(--state-success-bg); border-color: #86efac; color: #15803d; }
.q-num--wrong { background: var(--state-error-bg); border-color: #fca5a5; color: var(--state-error); }
.q-num--current { background: var(--wiki-brand-600); border-color: var(--wiki-brand-600); color: #fff; box-shadow: 0 0 0 3px var(--wiki-brand-200); }
.q-num--unanswered { background: var(--wiki-neutral-50); color: var(--wiki-neutral-400); }

.q-grid-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--wiki-space-4) var(--wiki-space-5); border-top: 1px solid var(--wiki-border);
  gap: var(--wiki-space-3); flex-wrap: wrap;
}
.q-grid-summary { display: flex; align-items: center; gap: var(--wiki-space-4); font-size: var(--wiki-text-xs); color: var(--wiki-neutral-600); }
.q-grid-summary strong { color: var(--wiki-foreground); }
.q-grid-submit {
  padding: 9px 20px; background: var(--wiki-brand-600); color: #fff;
  border: none; border-radius: var(--wiki-radius-md); font-size: var(--wiki-text-sm);
  font-weight: 600; cursor: pointer; transition: all var(--wiki-transition-fast); font-family: inherit;
}
.q-grid-submit:hover { background: var(--wiki-brand-700); }

/* Quiz content rendering inside card */
.quiz-content-render { font-size: var(--wiki-text-base); line-height: var(--wiki-leading-relaxed); color: var(--wiki-neutral-800); }
.quiz-content-render h1 { font-size: var(--wiki-text-xl); font-weight: 700; margin: var(--wiki-space-4) 0 var(--wiki-space-3); }
.quiz-content-render h2 { font-size: var(--wiki-text-lg); font-weight: 700; margin: var(--wiki-space-4) 0 var(--wiki-space-3); }
.quiz-content-render h3 { font-size: var(--wiki-text-base); font-weight: 700; margin: var(--wiki-space-3) 0 var(--wiki-space-2); }
.quiz-content-render p { margin-bottom: var(--wiki-space-3); }
.quiz-content-render strong { color: var(--wiki-neutral-900); font-weight: 600; }
.quiz-content-render ul, .quiz-content-render ol { margin: var(--wiki-space-2) 0 var(--wiki-space-3); padding-left: var(--wiki-space-6); }
.quiz-content-render li { margin-bottom: var(--wiki-space-1); }
.quiz-content-render blockquote { margin: var(--wiki-space-3) 0; padding: var(--wiki-space-3) var(--wiki-space-4); background: var(--wiki-neutral-50); border-left: 4px solid var(--wiki-brand-300); border-radius: var(--wiki-radius-sm); }
.quiz-content-render blockquote p { margin: 0; }
.quiz-content-render hr { border: none; border-top: 1px solid var(--wiki-border); margin: var(--wiki-space-4) 0; }
.quiz-content-render a { color: var(--wiki-brand-600); text-decoration: none; }
.quiz-content-render a:hover { text-decoration: underline; }
.quiz-content-render code { font-family: var(--wiki-font-mono); font-size: 0.9em; background: var(--wiki-neutral-100); padding: 2px 6px; border-radius: 4px; color: var(--wiki-brand-700); }

/* Responsive */
@media (max-width: 640px) {
  .quiz-nav-bar { flex-direction: column; align-items: stretch; }
  .quiz-nav-btns { justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .q-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ================================================================
   TOAST NOTIFICATIONS
   ================================================================ */
.wiki-toast {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 9999;
  min-width: 200px;
  max-width: 360px;
  padding: 12px 20px;
  border-radius: var(--wiki-radius-md);
  font-size: var(--wiki-text-sm);
  font-weight: 500;
  color: #fff;
  box-shadow: var(--wiki-shadow-lg);
  opacity: 0;
  transform: translateX(100%);
  transition: all 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.wiki-toast.show {
  opacity: 1;
  transform: translateX(0);
}
.wiki-toast-success {
  background: var(--state-success);
}
.wiki-toast-error {
  background: var(--state-error);
}
.wiki-toast-info {
  background: var(--wiki-brand-600);
}

/* ================================================================
   ANNOUNCEMENT BANNER (slim top bar)
   ================================================================ */
.wiki-banner-bar {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-3);
  padding: 8px 16px;
  border-radius: var(--wiki-radius-md);
  border: 1px solid;
  margin-bottom: var(--wiki-space-4);
  animation: bannerSlideIn 200ms cubic-bezier(0.2, 0.8, 0.2, 1);
  position: relative;
  font-size: var(--wiki-text-sm);
}

@keyframes bannerSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.wiki-banner-bar-info {
  background: color-mix(in srgb, var(--state-info) 8%, var(--wiki-card));
  border-color: color-mix(in srgb, var(--state-info) 25%, transparent);
}
.wiki-banner-bar-warning {
  background: color-mix(in srgb, var(--state-warning) 8%, var(--wiki-card));
  border-color: color-mix(in srgb, var(--state-warning) 25%, transparent);
}
.wiki-banner-bar-success {
  background: color-mix(in srgb, var(--state-success) 8%, var(--wiki-card));
  border-color: color-mix(in srgb, var(--state-success) 25%, transparent);
}
.wiki-banner-bar-error {
  background: color-mix(in srgb, var(--state-error) 8%, var(--wiki-card));
  border-color: color-mix(in srgb, var(--state-error) 25%, transparent);
}

.wiki-banner-bar-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}
.wiki-banner-bar-info .wiki-banner-bar-icon { color: var(--state-info); }
.wiki-banner-bar-warning .wiki-banner-bar-icon { color: var(--state-warning); }
.wiki-banner-bar-success .wiki-banner-bar-icon { color: var(--state-success); }
.wiki-banner-bar-error .wiki-banner-bar-icon { color: var(--state-error); }

.wiki-banner-bar-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wiki-banner-bar-scope {
  display: inline-block;
  font-size: var(--wiki-text-xs);
  padding: 1px 6px;
  border-radius: var(--wiki-radius-sm);
  background: var(--wiki-neutral-100);
  color: var(--wiki-neutral-500);
  font-weight: 500;
  margin-right: var(--wiki-space-2);
  vertical-align: middle;
}

.wiki-banner-bar-title {
  font-weight: 600;
  color: var(--wiki-neutral-800);
}
.wiki-banner-bar-title a {
  color: inherit;
  text-decoration: none;
}
.wiki-banner-bar-title a:hover {
  text-decoration: underline;
}

.wiki-banner-bar-desc {
  color: var(--wiki-neutral-500);
  margin-left: var(--wiki-space-2);
}

.wiki-banner-bar-close {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px;
  border-radius: var(--wiki-radius-sm);
  color: var(--wiki-neutral-400);
  transition: color var(--wiki-transition-fast);
  line-height: 0;
}
.wiki-banner-bar-close:hover {
  color: var(--wiki-neutral-700);
}
.wiki-banner-bar-close i { width: 14px; height: 14px; }

/* ================================================================
   NOTIFICATION BELL DROPDOWN
   ================================================================ */
.notif-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 380px;
  max-width: 90vw;
  max-height: 460px;
  background: var(--wiki-card);
  border: 1px solid var(--wiki-border);
  border-radius: var(--wiki-radius-lg);
  box-shadow: var(--wiki-shadow-lg);
  z-index: var(--wiki-z-dropdown);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.notif-dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--wiki-border);
}
.notif-dropdown-header h4 {
  margin: 0;
  font-size: var(--wiki-text-sm);
  font-weight: 600;
  color: var(--wiki-neutral-800);
}
.notif-dropdown-header .notif-count {
  font-size: var(--wiki-text-xs);
  color: var(--wiki-neutral-400);
  font-weight: 400;
}

.notif-dropdown-list {
  overflow-y: auto;
  flex: 1;
}

.notif-dropdown-item {
  display: flex;
  gap: var(--wiki-space-3);
  padding: 12px 16px;
  border-bottom: 1px solid var(--wiki-neutral-100);
  text-decoration: none;
  color: inherit;
  transition: background var(--wiki-transition-fast);
}
.notif-dropdown-item:last-child {
  border-bottom: none;
}
.notif-dropdown-item:hover {
  background: var(--wiki-neutral-50);
}

.notif-dropdown-item-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--wiki-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.notif-dropdown-item-icon i { width: 16px; height: 16px; }
.notif-dropdown-item-icon.info { background: var(--state-info-bg); color: var(--state-info); }
.notif-dropdown-item-icon.warning { background: var(--state-warning-bg); color: var(--state-warning); }
.notif-dropdown-item-icon.success { background: var(--state-success-bg); color: var(--state-success); }
.notif-dropdown-item-icon.error { background: var(--state-error-bg); color: var(--state-error); }

.notif-dropdown-item-body {
  flex: 1;
  min-width: 0;
}
.notif-dropdown-item-title {
  font-size: var(--wiki-text-sm);
  font-weight: 600;
  color: var(--wiki-neutral-800);
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.notif-dropdown-item-desc {
  font-size: var(--wiki-text-xs);
  color: var(--wiki-neutral-500);
  line-height: var(--wiki-leading-snug);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.notif-dropdown-item-meta {
  display: flex;
  align-items: center;
  gap: var(--wiki-space-2);
  margin-top: 4px;
}
.notif-dropdown-item-scope {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: var(--wiki-radius-sm);
  background: var(--wiki-neutral-100);
  color: var(--wiki-neutral-500);
  font-weight: 500;
}
.notif-dropdown-item-time {
  font-size: 10px;
  color: var(--wiki-neutral-400);
}

.notif-dropdown-empty {
  padding: var(--wiki-space-8) var(--wiki-space-4);
  text-align: center;
  color: var(--wiki-neutral-400);
  font-size: var(--wiki-text-sm);
}
.notif-dropdown-empty i {
  width: 32px;
  height: 32px;
  margin: 0 auto var(--wiki-space-2);
  display: block;
}

.notif-dropdown-footer {
  padding: 8px 16px;
  border-top: 1px solid var(--wiki-border);
  text-align: center;
}
.notif-dropdown-footer a {
  font-size: var(--wiki-text-xs);
  color: var(--wiki-brand-600);
  text-decoration: none;
  font-weight: 500;
}
.notif-dropdown-footer a:hover {
  text-decoration: underline;
}

/* ================================================================
   FONT PREFERENCE: Handwriting styles for content areas
   ================================================================ */
/* Option 1: LXGW WenKai (Chinese handwriting only) */
.font-wenkai .wiki-content-body,
.font-wenkai .kp-body {
  font-family: 'LXGW WenKai', 'Noto Sans SC', 'PingFang SC', sans-serif !important;
  font-size: var(--wiki-text-base);
  line-height: 1.9;
}
.font-wenkai .wiki-content-body h1,
.font-wenkai .wiki-content-body h2,
.font-wenkai .wiki-content-body h3,
.font-wenkai .wiki-content-body h4,
.font-wenkai .kp-body h2,
.font-wenkai .kp-body h3 {
  font-family: 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
}

/* Option 2: Muyao-Softbrush — 软笔手写体 (Chinese handwriting) */
.font-muyao .wiki-content-body,
.font-muyao .kp-body {
  font-family: 'Muyao-Softbrush', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
  font-size: var(--wiki-text-base);
  line-height: 2.0;
}
.font-muyao .wiki-content-body h1,
.font-muyao .wiki-content-body h2,
.font-muyao .wiki-content-body h3,
.font-muyao .wiki-content-body h4,
.font-muyao .kp-body h2,
.font-muyao .kp-body h3 {
  font-family: 'Muyao-Softbrush', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
}

/* Option 3: Ma Shan Zheng — Chinese brush calligraphy (马善政毛笔楷书) */
.font-mashan .wiki-content-body,
.font-mashan .kp-body {
  font-family: 'Ma Shan Zheng', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
  font-size: var(--wiki-text-base);
  line-height: 2.0;
}
.font-mashan .wiki-content-body h1,
.font-mashan .wiki-content-body h2,
.font-mashan .wiki-content-body h3,
.font-mashan .wiki-content-body h4,
.font-mashan .kp-body h2,
.font-mashan .kp-body h3 {
  font-family: 'Ma Shan Zheng', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
}

/* Option 4: Long Cang — Chinese cursive handwriting (龙藏行草) */
.font-longcang .wiki-content-body,
.font-longcang .kp-body {
  font-family: 'Long Cang', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
  font-size: var(--wiki-text-base);
  line-height: 2.0;
}
.font-longcang .wiki-content-body h1,
.font-longcang .wiki-content-body h2,
.font-longcang .wiki-content-body h3,
.font-longcang .wiki-content-body h4,
.font-longcang .kp-body h2,
.font-longcang .kp-body h3 {
  font-family: 'Long Cang', 'LXGW WenKai', 'Noto Sans SC', sans-serif !important;
}

/* KaTeX formulas are NOT affected by handwriting font */