/* ═══════════════════════════════════════════════════════════════════
   LogicXYZ CYBERSECURITY LEARNING PLATFORM — styles.css
   Phase 2: Complete Styling
   
   TABLE OF CONTENTS:
   01. CSS Custom Properties (Variables)
   02. CSS Reset & Base
   03. Typography
   04. Layout & App Wrapper
   05. Navigation Bar
   06. Page Sections & Transitions
   07. Dashboard — Header & Stats
   08. Tab Navigation (Shared)
   09. Dashboard Tabs — My Learning
   10. Dashboard Tabs — Saved & Completed
   11. Dashboard Tabs — Profile
   12. Card Grid & Card Components
   13. Progress Bars
   14. Learn Page — Layout & Filter Sidebar
   15. Learn Page — Filter Chips & Search
   16. Learn Page — Content Views
   17. Learn Page — Detail Headers (Path/Module)
   18. Learn Page — Room View
   19. Room — Accordion Content Sections
   20. Room — Task Cards
   21. Bot Panel
   22. Bot Chat Interface
   23. Buttons
   24. Badges & Tags
   25. Empty States
   26. Modals & Overlays
   27. Toast Notifications
   28. Breadcrumb Navigation
   29. Scrollbar Styling
   30. Animations & Keyframes
   31. Responsive — Tablet (≤ 1024px)
   32. Responsive — Mobile (≤ 768px)
   33. Responsive — Small Mobile (≤ 480px)
   34. Utility Classes
   35. Print Styles
═══════════════════════════════════════════════════════════════════ */


/* ═══════════════════════════════════════════════════════════════════
   01. CSS CUSTOM PROPERTIES
═══════════════════════════════════════════════════════════════════ */
:root {
  /* ── Terminal / Hacker Dark Theme ── */

  /* Core palette — pure black backgrounds */
  --bg-base:       #0a0a0a;
  --bg-surface:    #0f0f0f;
  --bg-card:       #141414;
  --bg-card-hover: #1a1a1a;
  --bg-elevated:   #1f1f1f;
  --bg-overlay:    rgba(0, 0, 0, 0.88);

  /* Accent — terminal green hsl(142 71% 45%) */
  --accent:        hsl(142, 71%, 45%);
  --accent-dim:    hsl(142, 71%, 32%);
  --accent-muted:  hsla(142, 71%, 45%, 0.10);
  --accent-glow:   hsla(142, 71%, 45%, 0.22);
  --accent-border: hsla(142, 71%, 45%, 0.24);

  /* Text hierarchy */
  --text-primary:  #e8e8e8;
  --text-secondary:#888888;
  --text-muted:    #444444;
  --text-accent:   hsl(142, 71%, 45%);
  --text-on-accent:#000000;

  /* Borders — hsl(0 0% 12%) */
  --border-base:   hsl(0, 0%, 12%);
  --border-subtle: hsl(0, 0%, 8%);
  --border-accent: hsla(142, 71%, 45%, 0.30);

  /* Semantic colors */
  --color-success: hsl(142, 71%, 45%);
  --color-warning: #e8a020;
  --color-error:   #f05050;
  --color-info:    #4da6ff;
  --color-purple:  #b07ef8;

  /* Difficulty colors */
  --diff-beginner:         hsl(142, 71%, 45%);
  --diff-beginner-bg:      hsla(142, 71%, 45%, 0.09);
  --diff-intermediate:     #e8a020;
  --diff-intermediate-bg:  rgba(232, 160, 32, 0.09);
  --diff-hard:             #f05050;
  --diff-hard-bg:          rgba(240, 80, 80, 0.09);

  /* Category colors */
  --cat-network:   hsl(142, 71%, 45%);
  --cat-web:       #4da6ff;
  --cat-linux:     #e8a020;
  --cat-crypto:    #b07ef8;
  --cat-pentest:   #f05050;
  --cat-forensics: #22d3ee;
  --cat-soc:       #fb923c;
  --cat-malware:   #f472b6;

  /* Typography — JetBrains Mono everywhere */
  --font-display: 'JetBrains Mono', 'Courier New', monospace;
  --font-body:    'JetBrains Mono', 'Courier New', monospace;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Font sizes */
  --fs-xs:   0.68rem;
  --fs-sm:   0.78rem;
  --fs-base: 0.875rem;
  --fs-md:   1rem;
  --fs-lg:   1.125rem;
  --fs-xl:   1.25rem;
  --fs-2xl:  1.5rem;
  --fs-3xl:  1.875rem;
  --fs-4xl:  2.25rem;

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radii — slightly sharper for terminal feel */
  --radius-sm:  4px;
  --radius-md:  6px;
  --radius-lg:  8px;
  --radius-xl:  12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;

  /* Shadows — pure black depth */
  --shadow-sm:   0 1px 4px rgba(0,0,0,0.6);
  --shadow-md:   0 4px 20px rgba(0,0,0,0.75);
  --shadow-lg:   0 8px 40px rgba(0,0,0,0.85);
  --shadow-glow: 0 0 24px hsla(142, 71%, 45%, 0.18);
  --shadow-card: 0 2px 10px rgba(0,0,0,0.55);

  /* Transitions */
  --transition-fast:   0.12s ease;
  --transition-base:   0.22s ease;
  --transition-slow:   0.38s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --nav-height:       56px;
  --bot-panel-width:  360px;
  --filter-width:     240px;
  --content-max-w:    1200px;
}


/* ═══════════════════════════════════════════════════════════════════
   02. CSS RESET & BASE
═══════════════════════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  /* Subtle CRT scanline effect */
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 3px,
      rgba(0, 0, 0, 0.08) 3px,
      rgba(0, 0, 0, 0.08) 4px
    );
}

/* Terminal green text selection */
::selection {
  background: hsla(142, 71%, 45%, 0.25);
  color: var(--text-primary);
}

/* Scrollbar — dark terminal style */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: hsl(0,0%,20%); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

ul, ol { list-style: none; }

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: inherit;
}

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

input, textarea, select {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--text-primary);
}

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

details > summary { cursor: pointer; list-style: none; }
details > summary::-webkit-details-marker { display: none; }

[hidden] { display: none !important; }


/* ═══════════════════════════════════════════════════════════════════
   03. TYPOGRAPHY
═══════════════════════════════════════════════════════════════════ */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); font-weight: 600; }

p { color: var(--text-secondary); line-height: 1.7; }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: rgba(34, 197, 94, 0.08);
  color: #86efac;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(34, 197, 94, 0.15);
}

pre {
  background: #0c0c0c;
  border: 1px solid var(--border-base);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: #a3e635;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

::selection {
  background: rgba(34, 197, 94, 0.25);
  color: var(--text-primary);
}


/* ═══════════════════════════════════════════════════════════════════
   04. LAYOUT & APP WRAPPER
═══════════════════════════════════════════════════════════════════ */
#app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* Main content + bot panel sit as flex siblings for split-screen */
.app-body {
  display: flex;
  flex: 1;
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
  overflow: hidden;
}

#main-content {
  flex: 1;
  min-width: 0;
  padding: var(--space-8) var(--space-8);
  overflow-y: auto;
  height: calc(100vh - var(--nav-height));
  transition: none;
}

/* When assistant fullpage is active, remove main-content padding/scroll */
#main-content:has(#page-assistant.active) {
  padding: 0;
  overflow: hidden;
}

.page-section {
  display: none;
  animation: pageEnter 0.32s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  width: 100%;
}

.page-section.active { display: block; }

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(18px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}


/* ═══════════════════════════════════════════════════════════════════
   05. NAVIGATION BAR
═══════════════════════════════════════════════════════════════════ */
#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(9, 9, 9, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-base);
}

#main-nav::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--accent) 30%, var(--accent) 70%, transparent 100%);
  opacity: 0.4;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-8);
  width: 100%;
  gap: var(--space-4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-xl);
  user-select: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo-bracket { color: var(--text-muted); font-weight: 400; font-size: 1.3em; line-height: 1.2; }
.logo-text    {
  color: var(--accent);
  letter-spacing: 0.04em; line-height: 1.2; display: inline-block;
  text-shadow: 0 0 16px var(--accent-glow);
}

/* Blinking cursor after logo */
.nav-logo::after {
  content: '_';
  color: var(--accent);
  opacity: 1;
  animation: cursorBlink 1.1s step-end infinite;
  margin-left: 1px;
  font-weight: 400;
}

@keyframes cursorBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.nav-links { display: flex; align-items: center; gap: var(--space-1); }

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-sm);
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  transition: color var(--transition-base), background var(--transition-base);
  position: relative;
}

.nav-link:hover     { color: var(--accent); background: var(--accent-muted); }
.nav-link.active    { color: var(--accent); background: var(--accent-muted); }

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.nav-right { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

.nav-xp {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.nav-xp #nav-xp-count { color: var(--accent); font-weight: 700; }

.nav-bot-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.nav-bot-btn:hover,
.nav-bot-btn[aria-expanded="true"] {
  background: var(--accent-muted);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-glow);
}

.nav-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-sm);
  color: var(--text-on-accent);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.nav-avatar:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: scale(1.05);
}


/* ═══════════════════════════════════════════════════════════════════
   07. DASHBOARD — HEADER & STATS
═══════════════════════════════════════════════════════════════════ */
.page-header { margin-bottom: var(--space-6); }

.dashboard-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-8) var(--space-8);
  border-radius: var(--radius-2xl);
  background: linear-gradient(135deg, var(--bg-card) 60%, rgba(34,197,94,0.04) 100%);
  border: 1px solid var(--accent-border);
  position: relative;
  overflow: hidden;
  width: 100%;
}

.dashboard-header::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,197,94,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.header-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  opacity: 0.8;
}

.header-title {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: 1.3;
  padding: var(--space-1) 0;
}

.header-title span { color: var(--accent); }

.header-subtitle {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* Stats: horizontal row INSIDE the header card */
.dash-quick-stats {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
}

.quick-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: var(--space-4) var(--space-5);
}

.quick-stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border-base);
  flex-shrink: 0;
}

.quick-stat-value {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.quick-stat-label {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.04em;
}


/* ═══════════════════════════════════════════════════════════════════
   08. TAB NAVIGATION (SHARED)
═══════════════════════════════════════════════════════════════════ */
.tab-nav {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  width: fit-content;
  margin-bottom: var(--space-6);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  color: var(--text-muted);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.tab-btn:hover  { color: var(--text-secondary); background: var(--bg-elevated); }
.tab-btn.active { color: var(--accent); background: var(--accent-muted); border: 1px solid var(--accent-border); }

.tab-panel { animation: fadeIn 0.28s cubic-bezier(0.16, 1, 0.3, 1); }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}


/* ═══════════════════════════════════════════════════════════════════
   09. DASHBOARD SECTIONS
═══════════════════════════════════════════════════════════════════ */
.dash-section { margin-bottom: var(--space-10); }

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.section-subtitle { font-size: var(--fs-sm); color: var(--text-muted); margin-bottom: var(--space-5); }


/* ═══════════════════════════════════════════════════════════════════
   11. DASHBOARD — PROFILE TAB
═══════════════════════════════════════════════════════════════════ */
.profile-launcher-section { display: flex; justify-content: center; padding: var(--space-10) 0; }

.profile-launch-card {
  background: var(--bg-card);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-glow);
}

.profile-launch-emoji { font-size: 3.5rem; display: block; margin-bottom: var(--space-4); }
.profile-launch-card h2 { margin-bottom: var(--space-3); }
.profile-launch-card p { font-size: var(--fs-sm); margin-bottom: var(--space-6); }

.profile-mini-preview {
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  text-align: left;
}

.pmp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.pmp-row:last-child { border-bottom: none; }
.pmp-label { font-size: var(--fs-xs); color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.pmp-value { font-size: var(--fs-sm); color: var(--accent); font-weight: 600; }


/* ═══════════════════════════════════════════════════════════════════
   12. CARD GRID & CARDS
═══════════════════════════════════════════════════════════════════ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* Stagger card entrance */
.card-grid .content-card { animation: cardEnter 0.35s cubic-bezier(0.16,1,0.3,1) both; }
.card-grid .content-card:nth-child(1)  { animation-delay: 0.03s; }
.card-grid .content-card:nth-child(2)  { animation-delay: 0.06s; }
.card-grid .content-card:nth-child(3)  { animation-delay: 0.09s; }
.card-grid .content-card:nth-child(4)  { animation-delay: 0.12s; }
.card-grid .content-card:nth-child(5)  { animation-delay: 0.15s; }
.card-grid .content-card:nth-child(6)  { animation-delay: 0.18s; }
.card-grid .content-card:nth-child(n+7){ animation-delay: 0.20s; }

@keyframes cardEnter {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}

.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  cursor: pointer;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
  overflow: hidden;
}

.content-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.content-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-border);
  box-shadow: 0 0 24px rgba(34,197,94,0.12), 0 8px 32px rgba(0,0,0,0.4);
  background: var(--bg-card-hover);
}

.content-card:hover::before { opacity: 1; }

.card-header    { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-3); }

.card-emoji {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
}

.card-bookmark-btn {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.card-bookmark-btn:hover,
.card-bookmark-btn.saved { color: var(--color-warning); border-color: rgba(234,179,8,0.3); background: rgba(234,179,8,0.08); }

.card-title { font-family: var(--font-display); font-size: var(--fs-md); font-weight: 700; color: var(--text-primary); line-height: 1.3; margin-bottom: 2px; }

.card-description {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta   { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-top: auto; }
.card-footer { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-top: auto; }
.card-actions { display: flex; gap: var(--space-2); margin-top: var(--space-2); }

.content-card.completed { border-color: rgba(34,197,94,0.2); }
.content-card.completed::after { content: '✅'; position: absolute; top: var(--space-3); right: var(--space-3); font-size: 0.85rem; }
.content-card.active-room { border-color: rgba(59,130,246,0.25); }


/* ═══════════════════════════════════════════════════════════════════
   13. PROGRESS BARS
═══════════════════════════════════════════════════════════════════ */
.progress-track {
  width: 100%;
  height: 5px;
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #4ade80);
  border-radius: var(--radius-full);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0; left: -100%; right: 0; bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer { 0% { transform: translateX(0); } 100% { transform: translateX(200%); } }

.progress-pct { font-family: var(--font-display); font-size: var(--fs-xs); font-weight: 700; color: var(--accent); }

.room-progress-bar-wrap { margin: var(--space-5) 0; }

.rpb-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  letter-spacing: 0.04em;
}

#room-overall-track { height: 8px; }


/* ═══════════════════════════════════════════════════════════════════
   14. LEARN PAGE — TOP-BAR FILTER LAYOUT
═══════════════════════════════════════════════════════════════════ */

/* Page-level section: vertical stack */
#page-learn { display: flex; flex-direction: column; gap: var(--space-4); }

/* ── Learn Subtab Navigation ── */
.learn-subtab-nav {
  width: fit-content;
  margin-bottom: 0;
  flex-shrink: 0;
}

/* Room mode — hide the subtab nav */
#page-learn.room-mode .learn-subtab-nav { display: none !important; }

/* ── Learn Subtab Panels ── */
.learn-subtab-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  animation: fadeIn 0.25s ease;
}

/* ── Subtab Controls (search + filter in a row) ── */
.learn-subtab-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ── Top Search Bar ── */
.learn-top-search {
  width: 100%;
}

.learn-top-search .search-input-wrap {
  position: relative;
  max-width: 100%;
}

.learn-top-search .search-input {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: 11px var(--space-4) 11px 40px;
  font-size: var(--fs-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.learn-top-search .search-input::placeholder { color: var(--text-muted); }
.learn-top-search .search-input:focus {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px hsla(142,71%,45%,0.08);
}

/* ── Filter Top Bar ── */
.filter-topbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
}

/* ── Dropdown Wrapper ── */
.ftb-dropdown-wrap {
  position: relative;
}

/* ── Dropdown Trigger Button ── */
.ftb-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.ftb-dropdown-btn:hover {
  border-color: var(--accent-border);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Active state — when filter has selections */
.ftb-dropdown-wrap.has-filter .ftb-dropdown-btn {
  background: var(--accent-muted);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Open state */
.ftb-dropdown-wrap.open .ftb-dropdown-btn {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-muted);
}

.ftb-chevron {
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  color: currentColor;
}

.ftb-dropdown-wrap.open .ftb-chevron {
  transform: rotate(180deg);
}

/* ── Dropdown Panel ── */
.ftb-dropdown-panel {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.3);
  min-width: 200px;
  overflow: hidden;
  animation: dropdownOpen 0.15s ease;
}

@keyframes dropdownOpen {
  from { opacity: 0; transform: translateY(-8px) scaleY(0.95); }
  to   { opacity: 1; transform: translateY(0)    scaleY(1); }
}

.ftb-dropdown-wrap.open .ftb-dropdown-panel {
  display: block;
}

.ftb-panel-inner {
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* ── Clear All & Filter Actions ── */
.ftb-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.filter-clear-btn {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  padding: 7px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-base);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-clear-btn:hover { color: var(--color-error); border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.06); }

/* ── Mobile filter toggle (legacy, kept for compatibility) ── */
.mobile-filter-toggle { display: none; }

/* ── Full-Page Assistant ── */
.assistant-fullpage {
  height: calc(100vh - var(--nav-height));
  padding: 0 !important;
  overflow: hidden;
}

.asst-layout {
  display: flex;
  height: 100%;
  overflow: hidden;
}

/* ── Sidebar ── */
.asst-sidebar {
  width: 230px;
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-base);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.asst-sidebar-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--border-base);
  text-align: center;
}

.asst-hero-avatar {
  font-size: 2.2rem;
  line-height: 1;
  filter: drop-shadow(0 0 10px rgba(163,234,42,0.3));
}

.asst-hero-title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.asst-hero-status {
  font-size: var(--fs-xs);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.asst-sidebar-stats {
  display: flex;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-base);
}

.asst-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-3) var(--space-2);
}

.asst-stat + .asst-stat { border-left: 1px solid var(--border-base); }

.asst-stat-val {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.asst-stat-lbl {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-align: center;
}

.asst-quick-section {
  padding: var(--space-3);
  flex: 1;
  overflow-y: auto;
}

.asst-quick-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  opacity: 0.65;
}

.asst-quick-list { display: flex; flex-direction: column; gap: 2px; }

.asst-quick-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 6px var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.asst-quick-btn:hover {
  background: var(--accent-muted);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* ── Chat Area ── */
.asst-chat-area {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-base);
}

.asst-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-5);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-base);
  flex-shrink: 0;
  min-height: 40px;
}

.asst-chat-header-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--accent);
  letter-spacing: 0.12em;
  opacity: 0.6;
}

.asst-header-clear-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid var(--border-base);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.asst-header-clear-btn:hover {
  color: var(--color-error);
  border-color: rgba(255,71,87,0.35);
  background: rgba(255,71,87,0.06);
}

.asst-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.asst-msg {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
}

.asst-msg-bot  { align-self: flex-start; max-width: 82%; }
.asst-msg-user { align-self: flex-end; flex-direction: row-reverse; max-width: 75%; }

.asst-msg-avatar {
  font-size: 1.15rem;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.asst-bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--fs-sm);
  line-height: 1.7;
  word-break: break-word;
}

.asst-bubble-bot {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  color: var(--text-primary);
  border-bottom-left-radius: var(--radius-sm);
}

.asst-bubble-user {
  background: var(--accent-muted);
  border: 1px solid var(--accent-border);
  color: var(--text-primary);
  border-bottom-right-radius: var(--radius-sm);
}

.asst-msg-time {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: 3px;
  padding: 0 var(--space-1);
}

.asst-typing {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-6) var(--space-3);
  flex-shrink: 0;
}

/* ── Input Footer ── */
.asst-input-footer {
  padding: var(--space-3) var(--space-5) var(--space-3);
  border-top: 1px solid var(--border-base);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.asst-input-wrap {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.asst-input-wrap:focus-within {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px rgba(163,234,42,0.07);
}

.asst-input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  line-height: 1.6;
  max-height: 120px;
  overflow-y: auto;
  padding: 5px 0;
  align-self: center;
}

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

.asst-send-btn {
  width: 34px; height: 34px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--text-on-accent);
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: all var(--transition-base);
  display: flex; align-items: center; justify-content: center;
  align-self: flex-end;
}

.asst-send-btn:hover {
  background: var(--accent-dim);
  box-shadow: 0 0 12px rgba(163,234,42,0.28);
}

.asst-input-hint {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
  padding-left: 2px;
}

/* ── Profile Page — Inline iFrame ── */
/* ═══════════════════════════════════════════════════════════════════
   PROFILE PAGE — Inlined, scoped to #page-profile
═══════════════════════════════════════════════════════════════════ */
.profile-fullpage {
  height: calc(100vh - var(--nav-height));
  overflow-y: auto;
  padding: 0 !important;
}

.prf-wrap {
  width: 100%;
  padding: 28px 32px 48px;
}

/* ── Hero ── */
.prf-hero {
  background: linear-gradient(135deg, var(--bg-card) 55%, hsla(142,71%,45%,0.04));
  border: 1px solid var(--accent-border);
  border-radius: 18px;
  padding: 32px 36px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.prf-avatar {
  width: 84px; height: 84px;
  border-radius: 50%;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem; font-weight: 800;
  color: #000; flex-shrink: 0;
  box-shadow: 0 0 28px var(--accent-glow);
}

.prf-hero-info { flex: 1; min-width: 200px; }
.prf-hero-info h1 {
  font-family: var(--font-display);
  font-size: 1.7rem; font-weight: 800;
  color: var(--text-primary); margin-bottom: 4px;
}
.prf-hero-rank  { font-size: 0.78rem; color: var(--accent); margin-bottom: 6px; letter-spacing: 0.08em; }
.prf-hero-quote { font-size: 0.78rem; color: var(--text-muted); font-style: italic; }

/* ── Stats strip ── */
.prf-stats-strip {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
  margin-bottom: 24px;
}
.prf-stat-cell {
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  gap: 3px;
  padding: 18px 12px;
}
.prf-val {
  font-family: var(--font-display);
  font-size: 1.6rem; font-weight: 800;
  color: var(--accent); line-height: 1;
}
.prf-lbl {
  font-size: 0.65rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.07em; text-align: center;
}
.prf-stat-div { width: 1px; height: 40px; background: var(--border-base); flex-shrink: 0; }

/* ── Grid ── */
.prf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.prf-full-width { grid-column: 1 / -1; }

/* ── Cards ── */
.prf-section {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: 18px;
  padding: 26px 28px;
}
.prf-danger { border-color: rgba(239,68,68,0.25); }
.prf-section h2 {
  font-family: var(--font-display);
  font-size: 0.95rem; font-weight: 700;
  margin-bottom: 18px; color: var(--text-primary);
  display: flex; align-items: center; gap: 8px;
}

/* ── Form ── */
.prf-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.prf-form-group { margin-bottom: 14px; }
.prf-form-group:last-of-type { margin-bottom: 0; }

#page-profile label {
  display: block;
  font-size: 0.68rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 6px; font-weight: 600;
}

#page-profile input[type=text] {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  color: var(--text-primary);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono); font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
#page-profile input[type=text]:focus {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 2px hsla(142,71%,45%,0.08);
}
.prf-input-sm { width: 80px !important; }

/* ── Buttons ── */
.prf-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  border-radius: 8px; border: none; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 700;
  transition: all 0.2s;
}
.prf-btn-primary { background: var(--accent); color: #000; }
.prf-btn-primary:hover { opacity: 0.85; box-shadow: 0 0 20px var(--accent-glow); }
.prf-btn-ghost { background: transparent; border: 1px solid var(--border-base); color: var(--text-secondary); }
.prf-btn-ghost:hover { border-color: var(--accent-border); color: var(--accent); }
.prf-btn-danger { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.25); color: #ef4444; }
.prf-btn-danger:hover { background: rgba(239,68,68,0.18); }
.prf-btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* ── Feedback ── */
.prf-feedback {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  margin-top: 12px;
  display: none;
  line-height: 1.5;
}
.prf-feedback.ok {
  background: var(--accent-muted);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  display: block;
}
.prf-feedback.err {
  background: rgba(239,68,68,0.1);
  color: #ef4444;
  border: 1px solid rgba(239,68,68,0.25);
  display: block;
}

/* ── Backup info ── */
.prf-backup-info {
  font-size: 0.78rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 16px; list-style: none;
}
.prf-backup-info li::before { content: "▸ "; color: var(--accent); }

/* ── Danger desc ── */
.prf-danger-desc { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 18px; line-height: 1.6; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .prf-grid     { grid-template-columns: 1fr; }
  .prf-form-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .prf-wrap        { padding: 20px 16px 36px; }
  .prf-hero        { flex-direction: column; text-align: center; padding: 24px 20px; }
  .prf-stats-strip { flex-wrap: wrap; }
  .prf-stat-cell   { flex: 1 1 calc(50% - 1px); }
}

.ftb-dropdown-btn:hover {
  border-color: var(--accent-border);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Active state — when filter has selections */
.ftb-dropdown-wrap.has-filter .ftb-dropdown-btn {
  background: var(--accent-muted);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Open state */
.ftb-dropdown-wrap.open .ftb-dropdown-btn {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-muted);
}

.ftb-chevron {
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  color: currentColor;
}

.ftb-dropdown-wrap.open .ftb-chevron {
  transform: rotate(180deg);
}

/* ── Dropdown Panel ── */
.ftb-dropdown-panel {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.45), 0 2px 8px rgba(0,0,0,0.3);
  min-width: 200px;
  overflow: hidden;
  animation: dropdownOpen 0.15s ease;
}

@keyframes dropdownOpen {
  from { opacity: 0; transform: translateY(-8px) scaleY(0.95); }
  to   { opacity: 1; transform: translateY(0)    scaleY(1); }
}

.ftb-dropdown-wrap.open .ftb-dropdown-panel {
  display: block;
}

.ftb-panel-inner {
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* ── Clear All & Filter Actions ── */
.ftb-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.filter-clear-btn {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  padding: 7px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-base);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-clear-btn:hover { color: var(--color-error); border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.06); }


/* ═══════════════════════════════════════════════════════════════════
   15. FILTER CHIPS & SEARCH (inside dropdown panels)
═══════════════════════════════════════════════════════════════════ */
.filter-group { display: flex; flex-direction: column; gap: var(--space-2); }

.filter-group-label {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--border-subtle);
}

.filter-options { display: flex; flex-direction: column; gap: 4px; }

.filter-chip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  user-select: none;
}

.filter-chip:hover { background: var(--bg-elevated); color: var(--text-primary); }

.filter-checkbox { width: 14px; height: 14px; accent-color: var(--accent); flex-shrink: 0; }

.filter-chip:has(.filter-checkbox:checked) {
  background: var(--accent-muted);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Legacy sidebar search input (keep for fallback) */
.search-input-wrap { position: relative; }

.search-icon { position: absolute; left: var(--space-3); top: 50%; transform: translateY(-50%); font-size: 0.85rem; pointer-events: none; }

.search-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  padding: 8px var(--space-3) 8px 34px;
  font-size: var(--fs-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { border-color: var(--accent-border); box-shadow: 0 0 0 3px rgba(34,197,94,0.08); }


/* ═══════════════════════════════════════════════════════════════════
   16. LEARN — CONTENT VIEWS
═══════════════════════════════════════════════════════════════════ */
.learn-content {
  width: 100%;
  overflow: hidden;
}

.learn-view { display: none; animation: fadeIn 0.3s ease; }
.learn-view.active { display: block; }

.results-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.results-bar span { font-size: var(--fs-sm); color: var(--text-muted); letter-spacing: 0.04em; }

.mobile-filter-toggle {
  display: none;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.learn-section { margin-bottom: var(--space-10); }

.learn-section-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-base);
}

.section-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px; height: 22px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--accent-muted);
  border: 1px solid var(--accent-border);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--accent);
}


/* ═══════════════════════════════════════════════════════════════════
   17. DETAIL HEADERS (PATH / MODULE)
═══════════════════════════════════════════════════════════════════ */
.detail-header {
  padding: var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-6);
  position: relative;
  overflow: hidden;
}

.detail-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.detail-header-top { display: flex; align-items: flex-start; gap: var(--space-5); }
.detail-emoji { font-size: 3rem; line-height: 1; flex-shrink: 0; }
.detail-info { flex: 1; }

.detail-title {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.detail-description { font-size: var(--fs-base); color: var(--text-secondary); margin-bottom: var(--space-4); line-height: 1.7; }
.detail-stats { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.detail-stat  { display: flex; align-items: center; gap: 5px; font-size: var(--fs-sm); color: var(--text-muted); }
.detail-actions { display: flex; gap: var(--space-3); margin-bottom: var(--space-6); flex-wrap: wrap; }


/* ═══════════════════════════════════════════════════════════════════
   18. ROOM VIEW HEADER
═══════════════════════════════════════════════════════════════════ */
.room-header {
  padding: var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-5);
  position: relative;
  overflow: hidden;
}

.room-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent) 40%, var(--accent) 60%, transparent);
  opacity: 0.7;
}

.room-header-top { display: flex; align-items: flex-start; gap: var(--space-5); flex-wrap: wrap; }
.room-emoji-large { font-size: 3.5rem; line-height: 1; flex-shrink: 0; }
.room-info        { flex: 1; min-width: 0; }

.room-title { font-family: var(--font-display); font-size: var(--fs-2xl); font-weight: 800; color: var(--text-primary); margin-bottom: var(--space-2); letter-spacing: -0.02em; }
.room-description { font-size: var(--fs-base); color: var(--text-secondary); line-height: 1.7; margin-bottom: var(--space-4); }
.room-meta-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.room-actions { display: flex; gap: var(--space-3); margin-bottom: var(--space-5); flex-wrap: wrap; }


/* ═══════════════════════════════════════════════════════════════════
   19. ACCORDION CONTENT
═══════════════════════════════════════════════════════════════════ */
.room-content-section,
.room-tasks-section { margin-bottom: var(--space-8); }

/* ── Accordion items — TryHackMe style ── */
.accordion-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-left: 3px solid transparent;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  overflow: hidden;
  transition: border-color var(--transition-base), border-left-color var(--transition-base);
}

.accordion-item.completed {
  border-left-color: var(--accent);
  border-color: rgba(136,193,0,0.18);
}
.accordion-item:hover { border-color: var(--border-accent); }

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-card);
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

.accordion-trigger:hover { background: var(--bg-card-hover); }
.accordion-trigger[aria-expanded="true"] { border-bottom: 1px solid var(--border-base); }

.accordion-step {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1.5px solid var(--border-base);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.accordion-item.completed .accordion-step {
  background: var(--accent);
  border-color: var(--accent);
  color: #0d0f1a;
  font-size: 0.7rem;
}
/* Show ✓ inside completed step */
.accordion-item.completed .accordion-step::after { content: "✓"; }

.accordion-type-emoji { font-size: 0.9rem; }

.accordion-arrow { margin-left: auto; font-size: 0.75rem; color: var(--text-muted); transition: transform var(--transition-base); }
.accordion-trigger[aria-expanded="true"] .accordion-arrow { transform: rotate(180deg); }

.accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.45s cubic-bezier(0.4,0,0.2,1); }
.accordion-body.open { max-height: 6000px; }

.accordion-body-inner {
  padding: var(--space-6) var(--space-8);
  background: var(--bg-surface);
}

/* ── Rich task content — TryHackMe reading style ── */
.task-rich-content { color: var(--text-primary); line-height: 1.85; font-size: var(--fs-sm); }

.task-rich-content p {
  margin: 0 0 var(--space-4) 0;
  color: #c8cbe0;
}

.task-rich-content h2,
.task-rich-content h3 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-6) 0 var(--space-3) 0;
}

/* Inline code chips — like `cd` `ls` in TryHackMe */
.task-rich-content code {
  display: inline-block;
  background: #1e2035;
  border: 1px solid #2e3050;
  border-radius: 4px;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: #c8cbe0;
  line-height: 1.6;
  white-space: nowrap;
}

/* Terminal / code block — macOS window style */
.task-terminal {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--space-5) 0;
  border: 1px solid var(--bg-surface);
  box-shadow: var(--shadow-md);
}

.task-terminal-bar {
  display: flex;
  align-items: center;
  background: #272944;
  padding: 8px 14px;
  position: relative;
}

.task-terminal-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.task-terminal-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.task-terminal-dots span:nth-child(1) { background: #ff5f56; }
.task-terminal-dots span:nth-child(2) { background: #ffbd2e; }
.task-terminal-dots span:nth-child(3) { background: #27c93f; }

.task-terminal-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: var(--fs-xs);
  color: #8b8fa8;
  white-space: nowrap;
  pointer-events: none;
}

.task-terminal-body {
  background: #0d0f1a;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  overflow-x: auto;
}

.term-line { display: flex; flex-wrap: wrap; gap: 0; }
.term-prompt { color: #c8cbe0; }
.term-cmd    { color: var(--accent); }
.term-output { color: #8b99b5; display: block; }

/* Fallback plain pre */
.content-text { font-size: var(--fs-sm); color: var(--text-secondary); line-height: 1.8; white-space: pre-wrap; word-break: break-word; }


/* ═══════════════════════════════════════════════════════════════════
   20. TASK CARDS
═══════════════════════════════════════════════════════════════════ */
.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  transition: border-color var(--transition-base);
  position: relative;
}

.task-card.task-completed { border-color: rgba(34,197,94,0.22); background: rgba(34,197,94,0.02); }

.task-header { display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-4); }
.task-emoji  { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.task-question { font-size: var(--fs-base); font-weight: 500; color: var(--text-primary); line-height: 1.5; }
.task-description { font-size: var(--fs-sm); color: var(--text-secondary); line-height: 1.6; margin-bottom: var(--space-4); }

.quiz-options { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-base);
  background: var(--bg-surface);
  cursor: pointer;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  text-align: left;
  width: 100%;
}

.quiz-option:hover:not(:disabled) { border-color: rgba(34,197,94,0.3); background: var(--accent-muted); color: var(--accent); }
.quiz-option.selected { border-color: var(--accent-border); background: var(--accent-muted); color: var(--accent); }
.quiz-option.correct  { border-color: rgba(34,197,94,0.5); background: rgba(34,197,94,0.12); color: #22c55e; }
.quiz-option.wrong    { border-color: rgba(239,68,68,0.4); background: rgba(239,68,68,0.08); color: #ef4444; }
.quiz-option:disabled { cursor: not-allowed; opacity: 0.7; }

.option-letter {
  width: 22px; height: 22px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--fs-xs);
  font-weight: 700;
  font-family: var(--font-display);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.task-answer-wrap { display: flex; gap: var(--space-2); margin-bottom: var(--space-3); }

.task-answer-input {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  padding: 10px var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.task-answer-input::placeholder { color: var(--text-muted); }
.task-answer-input:focus { border-color: var(--accent-border); box-shadow: 0 0 0 3px rgba(34,197,94,0.08); }
.task-answer-input.input-correct { border-color: rgba(34,197,94,0.5); background: rgba(34,197,94,0.06); color: var(--accent); }
.task-answer-input.input-wrong   { border-color: rgba(239,68,68,0.4); background: rgba(239,68,68,0.06); color: #ef4444; animation: shake 0.4s ease; }

@keyframes shake { 0%,100%{transform:translateX(0)} 20%{transform:translateX(-6px)} 40%{transform:translateX(6px)} 60%{transform:translateX(-4px)} 80%{transform:translateX(4px)} }

.task-feedback { font-size: var(--fs-sm); padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-2); }
.task-feedback.feedback-correct { background: rgba(34,197,94,0.10); color: #22c55e; border: 1px solid rgba(34,197,94,0.2); }
.task-feedback.feedback-wrong   { background: rgba(239,68,68,0.08); color: #ef4444; border: 1px solid rgba(239,68,68,0.2); }

.task-footer  { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.task-xp-reward { margin-left: auto; font-size: var(--fs-xs); color: var(--color-warning); font-weight: 600; letter-spacing: 0.04em; }

.task-hint { background: rgba(234,179,8,0.06); border: 1px solid rgba(234,179,8,0.15); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); margin-top: var(--space-3); }
.task-hint-text { font-size: var(--fs-sm); color: #ca8a04; line-height: 1.5; }


/* ═══════════════════════════════════════════════════════════════════
   21. BOT PANEL — SPLIT SCREEN (resizable)
═══════════════════════════════════════════════════════════════════ */
#bot-panel {
  width: var(--bot-panel-width);
  min-width: 260px;
  max-width: 55vw;
  height: calc(100vh - var(--nav-height));
  background: var(--bg-surface);
  border-left: 1px solid var(--border-base);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  /* Hidden by default — JS adds .open */
  display: none;
}

#bot-panel.open { display: flex; }

/* Drag handle on the LEFT edge of the bot panel */
.bot-resize-handle {
  position: absolute;
  top: 0; left: 0;
  width: 5px;
  height: 100%;
  cursor: col-resize;
  z-index: 10;
  background: transparent;
  transition: background var(--transition-fast);
}

.bot-resize-handle:hover,
.bot-resize-handle.dragging {
  background: var(--accent-border);
}

.bot-resize-handle::after {
  content: '⋮';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--text-muted);
  font-size: 1rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.bot-resize-handle:hover::after { opacity: 1; }

.bot-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-base);
  background: var(--bg-card);
  flex-shrink: 0;
}

.bot-header-info { display: flex; align-items: center; gap: var(--space-3); }

.bot-avatar {
  font-size: 1.6rem;
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-muted);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
}

.bot-name { font-family: var(--font-display); font-size: var(--fs-base); font-weight: 700; color: var(--text-primary); }

.bot-status { font-size: var(--fs-xs); color: var(--accent); display: flex; align-items: center; gap: 4px; letter-spacing: 0.04em; }

.bot-status::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }

.bot-close-btn {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.bot-close-btn:hover { background: rgba(239,68,68,0.1); border-color: rgba(239,68,68,0.3); color: #ef4444; }

.bot-tab-nav {
  display: flex;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-base);
  flex-shrink: 0;
}

.bot-tab-btn {
  flex: 1;
  padding: 10px var(--space-3);
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-base);
}

.bot-tab-btn:hover { color: var(--text-secondary); }
.bot-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.bot-tab-panels { flex: 1; overflow: hidden; display: flex; flex-direction: column; }

.bot-tab-panel { flex: 1; overflow-y: auto; padding: var(--space-4) var(--space-5); animation: fadeIn 0.2s ease; }


/* ═══════════════════════════════════════════════════════════════════
   22. BOT CHAT INTERFACE
═══════════════════════════════════════════════════════════════════ */
.bot-home-content { display: flex; flex-direction: column; align-items: center; text-align: center; gap: var(--space-4); }

.bot-home-avatar {
  font-size: 3rem;
  width: 72px; height: 72px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-muted);
  border: 2px solid var(--accent-border);
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
}

.bot-home-title { font-family: var(--font-display); font-size: var(--fs-lg); font-weight: 700; color: var(--text-primary); }
.bot-home-desc  { font-size: var(--fs-sm); color: var(--text-secondary); line-height: 1.6; }
.bot-home-stats { display: flex; gap: var(--space-3); width: 100%; }

.bot-stat {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-2);
  display: flex; flex-direction: column; align-items: center; gap: 3px;
}

.bot-stat-val { font-family: var(--font-display); font-size: var(--fs-xl); font-weight: 800; color: var(--accent); }
.bot-stat-lbl { font-size: var(--fs-xs); color: var(--text-muted); }

.bot-quick-actions { display: flex; flex-direction: column; gap: var(--space-2); width: 100%; }

.bot-quick-btn {
  width: 100%;
  padding: 8px var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  text-align: left;
  transition: all var(--transition-fast);
}

.bot-quick-btn:hover { background: var(--accent-muted); border-color: var(--accent-border); color: var(--accent); }

/* ── Chat Toolbar (Clear History) ── */
.chat-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.chat-clear-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 5px 12px;
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid var(--border-base);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.03em;
}

.chat-clear-btn:hover {
  color: var(--color-error);
  border-color: rgba(255,71,87,0.35);
  background: rgba(255,71,87,0.06);
}

.chat-messages-area { display: flex; flex-direction: column; gap: var(--space-4); padding-bottom: var(--space-2); }

.chat-message { display: flex; gap: var(--space-2); align-items: flex-end; }
.chat-message.user-message { flex-direction: row-reverse; }

.chat-msg-avatar {
  font-size: 1.1rem;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: 50%;
  flex-shrink: 0;
}

.chat-bubble { max-width: 86%; padding: var(--space-3) var(--space-4); border-radius: var(--radius-lg); font-size: var(--fs-sm); line-height: 1.6; }
.bot-bubble  { background: var(--bg-elevated); border: 1px solid var(--border-base); color: var(--text-primary); border-bottom-left-radius: var(--radius-sm); }
.user-bubble { background: var(--accent-muted); border: 1px solid var(--accent-border); color: var(--accent); border-bottom-right-radius: var(--radius-sm); }

/* ── Markdown rendered content inside bot bubbles ── */
.md-content { font-size: var(--fs-sm); line-height: 1.7; }
.md-content .md-p { margin: 0 0 8px 0; color: var(--text-primary); }
.md-content .md-p:last-child { margin-bottom: 0; }
.md-content .md-bold { color: var(--text-primary); font-weight: 700; }
.md-content .md-italic { font-style: italic; color: var(--text-secondary); }
.md-content .md-h1,.md-content .md-h2 { font-family: var(--font-display); font-weight: 700; color: var(--accent); margin: 10px 0 6px; line-height: 1.3; }
.md-content .md-h1 { font-size: var(--fs-lg); }
.md-content .md-h2 { font-size: var(--fs-md); }
.md-content .md-h3 { font-family: var(--font-display); font-size: var(--fs-base); font-weight: 700; color: var(--text-primary); margin: 8px 0 4px; }
.md-content .md-h4 { font-size: var(--fs-sm); font-weight: 700; color: var(--text-secondary); margin: 6px 0 3px; text-transform: uppercase; letter-spacing: .04em; }
.md-content .md-ul,.md-content .md-ol { padding-left: 18px; margin: 6px 0 8px; display: flex; flex-direction: column; gap: 3px; }
.md-content .md-ul { list-style: none; padding-left: 0; }
.md-content .md-ul .md-li { padding-left: 16px; position: relative; color: var(--text-primary); }
.md-content .md-ul .md-li::before { content: '▸'; position: absolute; left: 0; color: var(--accent); font-size: .8em; }
.md-content .md-ol { list-style: decimal; padding-left: 20px; }
.md-content .md-ol .md-oli { color: var(--text-primary); padding-left: 4px; }
.md-content .md-code-block { background: #0c0c0c; border: 1px solid var(--border-base); border-left: 3px solid var(--accent); border-radius: 6px; padding: 10px 14px; font-size: .8rem; color: #a3e635; line-height: 1.7; overflow-x: auto; white-space: pre; margin: 8px 0; }
.md-content .md-inline-code { background: rgba(34,197,94,.08); color: #86efac; border: 1px solid rgba(34,197,94,.15); border-radius: 3px; padding: 1px 5px; font-size: .85em; }
.md-content .md-hr { border: none; border-top: 1px solid var(--border-base); margin: 10px 0; }
.md-content .md-quote { border-left: 3px solid var(--accent); padding-left: 10px; color: var(--text-secondary); font-style: italic; margin: 6px 0; }

.chat-time { font-size: 0.65rem; color: var(--text-muted); margin-top: 3px; text-align: right; }
.user-message .chat-time { text-align: left; }

.typing-indicator { display: flex; align-items: flex-end; gap: var(--space-2); padding: var(--space-2) 0; }

.typing-avatar {
  font-size: 1.1rem;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: 50%;
}

.typing-dots {
  display: flex; align-items: center; gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
}

.typing-dots span { width: 6px; height: 6px; border-radius: 50%; background: var(--text-muted); }
.typing-dots span:nth-child(1) { animation: typingBounce 1.2s 0s infinite; }
.typing-dots span:nth-child(2) { animation: typingBounce 1.2s 0.2s infinite; }
.typing-dots span:nth-child(3) { animation: typingBounce 1.2s 0.4s infinite; }

@keyframes typingBounce { 0%,60%,100%{transform:translateY(0);opacity:0.4} 30%{transform:translateY(-6px);opacity:1} }

.faq-list { display: flex; flex-direction: column; gap: var(--space-2); }

.faq-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] { border-color: var(--accent-border); }

.faq-question { padding: var(--space-3) var(--space-4); font-size: var(--fs-sm); font-weight: 600; color: var(--text-primary); display: flex; align-items: center; justify-content: space-between; transition: color var(--transition-fast); }
.faq-question:hover { color: var(--accent); }
.faq-answer   { padding: var(--space-3) var(--space-4) var(--space-4); font-size: var(--fs-sm); color: var(--text-secondary); border-top: 1px solid var(--border-subtle); line-height: 1.6; }

.bot-input-area {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-base);
  background: var(--bg-card);
  flex-shrink: 0;
}

.bot-input-wrap { display: flex; gap: var(--space-2); align-items: flex-end; }

.bot-input {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  padding: 10px var(--space-3);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  outline: none;
  resize: none;
  max-height: 120px;
  min-height: 40px;
  overflow-y: auto;
  transition: border-color var(--transition-base);
  line-height: 1.5;
}

.bot-input::placeholder { color: var(--text-muted); }
.bot-input:focus { border-color: var(--accent-border); box-shadow: 0 0 0 2px rgba(34,197,94,0.08); }

.bot-send-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: #000;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.bot-send-btn:hover    { background: var(--accent-dim); box-shadow: var(--shadow-glow); }
.bot-send-btn:disabled { opacity: 0.5; cursor: not-allowed; }


/* ═══════════════════════════════════════════════════════════════════
   23. BUTTONS
═══════════════════════════════════════════════════════════════════ */
.btn-primary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  background: var(--accent); color: #000;
  font-family: var(--font-display); font-weight: 700; font-size: var(--fs-sm);
  letter-spacing: 0.03em; cursor: pointer; border: 1px solid transparent;
  transition: all var(--transition-base); white-space: nowrap;
}
.btn-primary:hover  { background: var(--accent-dim); box-shadow: 0 0 20px rgba(34,197,94,0.35); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  background: transparent; color: var(--accent);
  font-family: var(--font-display); font-weight: 600; font-size: var(--fs-sm);
  border: 1px solid var(--accent-border); cursor: pointer;
  transition: all var(--transition-base); white-space: nowrap;
}
.btn-secondary:hover { background: var(--accent-muted); border-color: var(--accent); box-shadow: 0 0 12px rgba(34,197,94,0.15); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated); color: var(--text-secondary);
  font-size: var(--fs-sm); font-weight: 500;
  border: 1px solid var(--border-base); cursor: pointer;
  transition: all var(--transition-base); white-space: nowrap;
}
.btn-ghost:hover { border-color: var(--accent-border); color: var(--accent); background: var(--accent-muted); }

.btn-danger {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  background: rgba(239,68,68,0.12); color: #ef4444;
  font-weight: 700; font-size: var(--fs-sm);
  border: 1px solid rgba(239,68,68,0.25); cursor: pointer;
  transition: all var(--transition-base);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); box-shadow: 0 0 16px rgba(239,68,68,0.2); }

.btn-submit {
  padding: 8px 18px;
  border-radius: var(--radius-md);
  background: var(--accent); color: #000;
  font-weight: 700; font-size: var(--fs-sm);
  border: none; cursor: pointer;
  transition: all var(--transition-fast); white-space: nowrap;
}
.btn-submit:hover { background: var(--accent-dim); box-shadow: var(--shadow-glow); }

.btn-hint {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  background: rgba(234,179,8,0.08);
  border: 1px solid rgba(234,179,8,0.2);
  color: #ca8a04; font-size: var(--fs-sm); font-weight: 500;
  cursor: pointer; transition: all var(--transition-fast);
}
.btn-hint:hover { background: rgba(234,179,8,0.14); border-color: rgba(234,179,8,0.35); }

.btn-sm   { padding: 6px 12px; font-size: var(--fs-xs); }
.btn-full { width: 100%; justify-content: center; }


/* ═══════════════════════════════════════════════════════════════════
   24. BADGES & TAGS
═══════════════════════════════════════════════════════════════════ */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.badge-beginner    { color: var(--diff-beginner); background: var(--diff-beginner-bg); border: 1px solid rgba(34,197,94,0.25); }
.badge-intermediate{ color: var(--diff-intermediate); background: var(--diff-intermediate-bg); border: 1px solid rgba(234,179,8,0.25); }
.badge-hard        { color: var(--diff-hard); background: var(--diff-hard-bg); border: 1px solid rgba(239,68,68,0.25); }

.badge-not-started { color: var(--text-muted); background: var(--bg-elevated); border: 1px solid var(--border-base); }
.badge-in-progress { color: var(--color-info); background: rgba(59,130,246,0.10); border: 1px solid rgba(59,130,246,0.22); }
.badge-completed   { color: var(--color-success); background: var(--accent-muted); border: 1px solid var(--accent-border); }

.badge-network  { color: var(--cat-network);  background: rgba(34,197,94,0.08);  border: 1px solid rgba(34,197,94,0.2); }
.badge-web      { color: var(--cat-web);      background: rgba(59,130,246,0.08); border: 1px solid rgba(59,130,246,0.2); }
.badge-linux    { color: var(--cat-linux);    background: rgba(234,179,8,0.08);  border: 1px solid rgba(234,179,8,0.2); }
.badge-crypto   { color: var(--cat-crypto);   background: rgba(168,85,247,0.08); border: 1px solid rgba(168,85,247,0.2); }
.badge-pentest  { color: var(--cat-pentest);  background: rgba(239,68,68,0.08);  border: 1px solid rgba(239,68,68,0.2); }
.badge-forensics{ color: var(--cat-forensics);background: rgba(6,182,212,0.08);  border: 1px solid rgba(6,182,212,0.2); }
.badge-soc      { color: var(--cat-soc);      background: rgba(249,115,22,0.08); border: 1px solid rgba(249,115,22,0.2); }
.badge-malware  { color: var(--cat-malware);  background: rgba(236,72,153,0.08); border: 1px solid rgba(236,72,153,0.2); }

.badge-theory   { color: #94a3b8; background: rgba(148,163,184,0.08); border: 1px solid rgba(148,163,184,0.2); }
.badge-practical{ color: #fb923c; background: rgba(251,146,60,0.08); border: 1px solid rgba(251,146,60,0.2); }
.badge-quiz     { color: #67e8f9; background: rgba(103,232,249,0.08); border: 1px solid rgba(103,232,249,0.2); }
.badge-xp       { color: var(--color-warning); background: rgba(234,179,8,0.08); border: 1px solid rgba(234,179,8,0.2); }


/* ═══════════════════════════════════════════════════════════════════
   25. EMPTY STATES
═══════════════════════════════════════════════════════════════════ */
.empty-state {
  grid-column: 1 / -1;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center; gap: var(--space-4);
}

.empty-emoji { font-size: 3rem; display: block; opacity: 0.4; animation: float 3s ease-in-out infinite; }
.empty-state p { font-size: var(--fs-sm); color: var(--text-muted); max-width: 320px; line-height: 1.6; }
.empty-state strong { color: var(--text-secondary); }

@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }


/* ═══════════════════════════════════════════════════════════════════
   26. MODALS & OVERLAYS
═══════════════════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-4);
  animation: fadeIn 0.2s ease;
}

.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  max-width: 440px; width: 100%;
  box-shadow: var(--shadow-lg);
  animation: modalSlideIn 0.3s cubic-bezier(0.4,0,0.2,1);
}

@keyframes modalSlideIn { from{opacity:0;transform:scale(0.95) translateY(8px)} to{opacity:1;transform:scale(1) translateY(0)} }

.modal-title    { font-family: var(--font-display); font-size: var(--fs-xl); font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-3); }
.modal-body     { font-size: var(--fs-base); color: var(--text-secondary); margin-bottom: var(--space-6); line-height: 1.6; }
.modal-actions  { display: flex; gap: var(--space-3); justify-content: flex-end; }


/* ═══════════════════════════════════════════════════════════════════
   27. TOAST NOTIFICATIONS
═══════════════════════════════════════════════════════════════════ */
#toast-container {
  position: fixed;
  bottom: var(--space-6); right: var(--space-6);
  z-index: 3000;
  display: flex; flex-direction: column; gap: var(--space-2);
  pointer-events: none; max-width: 380px;
}

.toast {
  display: flex; align-items: flex-start; gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border-base);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.35s cubic-bezier(0.4,0,0.2,1) forwards;
  pointer-events: all; min-width: 260px;
}

.toast.toast-exit { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn  { from{opacity:0;transform:translateX(100%) scale(0.95)} to{opacity:1;transform:translateX(0) scale(1)} }
@keyframes toastOut { from{opacity:1;transform:translateX(0) scale(1);max-height:100px} to{opacity:0;transform:translateX(30px) scale(0.95);max-height:0;padding:0} }

.toast-icon    { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.toast-content { flex: 1; min-width: 0; }
.toast-title   { font-family: var(--font-display); font-size: var(--fs-sm); font-weight: 700; color: var(--text-primary); margin-bottom: 2px; }
.toast-message { font-size: var(--fs-xs); color: var(--text-secondary); line-height: 1.4; }

.toast-success { border-color: rgba(34,197,94,0.25); }  .toast-success .toast-icon { color: var(--accent); }
.toast-error   { border-color: rgba(239,68,68,0.25); }  .toast-error   .toast-icon { color: #ef4444; }
.toast-warning { border-color: rgba(234,179,8,0.25); }  .toast-warning .toast-icon { color: #eab308; }
.toast-info    { border-color: rgba(59,130,246,0.25); }  .toast-info    .toast-icon { color: #3b82f6; }


/* ═══════════════════════════════════════════════════════════════════
   28. BREADCRUMB
═══════════════════════════════════════════════════════════════════ */
.breadcrumb { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-5); flex-wrap: wrap; }
.breadcrumb-link { font-size: var(--fs-sm); color: var(--text-muted); padding: 3px 6px; border-radius: var(--radius-sm); transition: color var(--transition-fast); }
.breadcrumb-link:hover { color: var(--accent); background: var(--accent-muted); }
.breadcrumb-sep { font-size: var(--fs-sm); color: var(--text-muted); opacity: 0.5; }
.breadcrumb-current { font-size: var(--fs-sm); color: var(--text-secondary); font-weight: 500; }


/* ═══════════════════════════════════════════════════════════════════
   29. SCROLLBAR
═══════════════════════════════════════════════════════════════════ */
::-webkit-scrollbar        { width: 5px; height: 5px; }
::-webkit-scrollbar-track  { background: var(--bg-surface); }
::-webkit-scrollbar-thumb  { background: rgba(34,197,94,0.25); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: rgba(34,197,94,0.45); }
* { scrollbar-width: thin; scrollbar-color: rgba(34,197,94,0.25) var(--bg-surface); }


/* ═══════════════════════════════════════════════════════════════════
   30. ADDITIONAL ANIMATIONS
═══════════════════════════════════════════════════════════════════ */
.answer-correct-flash { animation: correctFlash 0.6s ease; }
@keyframes correctFlash { 0%{background-color:transparent} 30%{background-color:rgba(34,197,94,0.2)} 100%{background-color:transparent} }

.card-grid .content-card { animation: cardEntrance 0.4s ease both; }
.card-grid .content-card:nth-child(1){animation-delay:0.00s}
.card-grid .content-card:nth-child(2){animation-delay:0.04s}
.card-grid .content-card:nth-child(3){animation-delay:0.08s}
.card-grid .content-card:nth-child(4){animation-delay:0.12s}
.card-grid .content-card:nth-child(5){animation-delay:0.16s}
.card-grid .content-card:nth-child(6){animation-delay:0.20s}
.card-grid .content-card:nth-child(7){animation-delay:0.24s}
.card-grid .content-card:nth-child(8){animation-delay:0.28s}

@keyframes cardEntrance { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }

.spinner { width:20px;height:20px;border:2px solid var(--border-base);border-top-color:var(--accent);border-radius:50%;animation:spin 0.8s linear infinite;display:inline-block; }
@keyframes spin { to{transform:rotate(360deg)} }


/* ═══════════════════════════════════════════════════════════════════
   31. RESPONSIVE — TABLET
═══════════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  :root { --filter-width: 200px; }
  #main-content { padding: var(--space-6) var(--space-5); }
  .dashboard-header { padding: var(--space-6); }
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .header-title { font-size: var(--fs-2xl); }
}


/* ═══════════════════════════════════════════════════════════════════
   32. RESPONSIVE — MOBILE
═══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-xp { display: none; }
  .nav-links { gap: 2px; }
  .nav-link  { padding: 6px 10px; font-size: var(--fs-xs); }
  #main-content { padding: var(--space-4) var(--space-3); }
  .dashboard-header { padding: var(--space-5); }
  .header-title { font-size: var(--fs-xl); }
  .dash-quick-stats { flex-wrap: wrap; }
  .quick-stat { flex: 1 1 calc(50% - 1px); min-width: 100px; }
  .quick-stat-divider:nth-child(4) { display: none; }
  .tab-nav  { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-btn  { flex: 1; justify-content: center; padding: 8px var(--space-3); font-size: var(--fs-xs); }
  /* Learn tab — mobile: stack filter dropdowns, show toggle */
  .filter-topbar { gap: var(--space-2); padding: var(--space-2) var(--space-3); }
  .ftb-dropdown-wrap { flex: 1 1 calc(50% - var(--space-2)); min-width: 120px; }
  .ftb-actions { width: 100%; justify-content: flex-end; }
  .card-grid { grid-template-columns: 1fr; }
  .room-header-top { flex-direction: column; align-items: flex-start; }
  .room-actions, .detail-actions { flex-direction: column; }
  .btn-primary, .btn-secondary, .btn-ghost { width: 100%; justify-content: center; }
  /* Bot takes full width on mobile */
  #bot-panel { width: 100% !important; min-width: unset; max-width: none; position: fixed; top: var(--nav-height); left: 0; right: 0; height: calc(100vh - var(--nav-height)); z-index: 900; }
  #toast-container { right: var(--space-3); bottom: var(--space-3); left: var(--space-3); max-width: none; }
  .modal-box { padding: var(--space-5); border-radius: var(--radius-xl); }
  .profile-launch-card { padding: var(--space-6); }
}


/* ═══════════════════════════════════════════════════════════════════
   33. RESPONSIVE — SMALL MOBILE
═══════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .nav-container { padding: 0 var(--space-3); }
  .logo-text { font-size: var(--fs-lg); }
  .dashboard-header { padding: var(--space-4); }
  .header-title { font-size: var(--fs-lg); }
  .dash-quick-stats { flex-direction: row; overflow-x: auto; gap: var(--space-3); padding-bottom: var(--space-2); }
  .quick-stat { min-width: 80px; flex-shrink: 0; }
  .learn-section-title, .section-title { font-size: var(--fs-base); }
  .room-title { font-size: var(--fs-xl); }
  .detail-title { font-size: var(--fs-2xl); }
  .task-answer-wrap { flex-direction: column; }
  .btn-submit { width: 100%; text-align: center; justify-content: center; }
  .breadcrumb-link { font-size: var(--fs-xs); }
}


/* ═══════════════════════════════════════════════════════════════════
   34. UTILITY CLASSES
═══════════════════════════════════════════════════════════════════ */
.text-accent    { color: var(--accent) !important; }
.text-muted     { color: var(--text-muted) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-error     { color: var(--color-error) !important; }
.text-warning   { color: var(--color-warning) !important; }

.hidden  { display: none !important; }
.visible { display: block !important; }
.flex    { display: flex !important; }

.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { flex-direction: column; }
.flex-wrap    { flex-wrap: wrap; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

.mt-2  { margin-top:    var(--space-2); } .mt-4  { margin-top:    var(--space-4); }
.mb-2  { margin-bottom: var(--space-2); } .mb-4  { margin-bottom: var(--space-4); }

.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.disabled { opacity: 0.5; pointer-events: none; cursor: not-allowed; }
.highlight { background: var(--accent-muted); border-color: var(--accent-border) !important; color: var(--accent) !important; }
.w-full    { width: 100%; }
.mono      { font-family: var(--font-mono); font-size: 0.9em; }

.divider { height: 1px; background: var(--border-base); margin: var(--space-5) 0; }
.label   { font-family: var(--font-display); font-size: var(--fs-xs); font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}


/* ═══════════════════════════════════════════════════════════════════
   35. PRINT STYLES
═══════════════════════════════════════════════════════════════════ */
@media print {
  #main-nav, #bot-panel, #toast-container, .card-actions, .room-actions, .btn-primary, .btn-secondary, .btn-ghost { display: none !important; }
  body { background: #fff; color: #000; }
  .content-card { border: 1px solid #ccc; page-break-inside: avoid; }
}