/* ============================================
   CPTS Companion - HTB Dark Terminal Theme
   ============================================ */

/* CSS Variables */
:root {
  /* Core colors */
  --htb-black: #111927;
  --htb-dark: #1a2332;
  --htb-darker: #141d2b;
  --htb-card: #1f2937;
  --htb-border: #2d3748;
  --htb-border-light: #374151;

  /* Accent colors */
  --htb-green: #9fef00;
  --htb-green-dark: #7cc600;
  --htb-cyan: #00d4ff;
  --htb-amber: #ffb800;
  --htb-red: #ff4444;
  --htb-purple: #a855f7;

  /* Text colors */
  --text-primary: #f8fafc;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* Font stack */
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  /* Sizing */
  --sidebar-width: 260px;
  --topbar-height: 60px;
  --border-radius: 6px;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--htb-black);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
}

a {
  color: var(--htb-green);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--htb-green-dark);
  text-decoration: underline;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

h1 {
  font-size: 1.75rem;
}
h2 {
  font-size: 1.5rem;
}
h3 {
  font-size: 1.25rem;
}

p {
  margin: 0 0 1rem;
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--htb-darker);
  border-right: 1px solid var(--htb-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-logo {
  padding: 1.25rem;
  border-bottom: 1px solid var(--htb-border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.sidebar-logo:hover {
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--htb-green);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--htb-black);
  font-size: 1.25rem;
}

.logo-icon.logo-image {
  background: transparent;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
}

.logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-text span {
  color: var(--htb-green);
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
  overflow-y: auto;
}

.nav-section {
  padding: 0 0.75rem;
  margin-bottom: 1.5rem;
}

.nav-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  padding: 0 0.75rem;
  margin-bottom: 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  transition: all 0.2s;
  margin-bottom: 0.25rem;
}

.nav-item:hover {
  background: var(--htb-card);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-item.active {
  background: rgba(159, 239, 0, 0.1);
  color: var(--htb-green);
  border-left: 3px solid var(--htb-green);
  margin-left: -3px;
}

.nav-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

.nav-badge {
  margin-left: auto;
  background: var(--htb-green);
  color: var(--htb-black);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  font-weight: 600;
}

/* Main Content Area */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top Bar */
.topbar {
  height: var(--topbar-height);
  background: var(--htb-darker);
  border-bottom: 1px solid var(--htb-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-stats {
  display: flex;
  gap: 2rem;
}

.mobile-menu-btn {
  display: none; /* Hidden on desktop */
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn:hover {
  color: var(--htb-green);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stat-icon {
  color: var(--htb-green);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.stat-value {
  color: var(--text-primary);
  font-weight: 600;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.cmd-palette-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.cmd-palette-btn:hover {
  border-color: var(--htb-green);
  color: var(--text-primary);
}

.cmd-palette-btn kbd {
  background: var(--htb-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.75rem;
  border: 1px solid var(--htb-border);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
}

/* Cards / Panels */
.panel {
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--htb-border);
}

.panel-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-title-icon {
  color: var(--htb-green);
}

.panel-body {
  padding: 1.25rem;
}

.panel-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--htb-border);
  background: rgba(0, 0, 0, 0.2);
}

/* Terminal-styled code blocks */
.terminal {
  background: var(--htb-black);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  overflow-x: auto;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--htb-border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red {
  background: #ff5f56;
}
.terminal-dot.yellow {
  background: #ffbd2e;
}
.terminal-dot.green {
  background: #27c93f;
}

.terminal-title {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: auto;
}

.terminal pre {
  margin: 0;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal .prompt {
  color: var(--htb-green);
}

.terminal .comment {
  color: var(--text-muted);
}

.terminal .flag {
  color: var(--htb-cyan);
}

.terminal .value {
  color: var(--htb-amber);
}

/* CLI-style chips/tags */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.chip::before {
  content: "--";
  color: var(--htb-cyan);
}

.chip-green {
  border-color: var(--htb-green);
  color: var(--htb-green);
}
.chip-cyan {
  border-color: var(--htb-cyan);
  color: var(--htb-cyan);
}
.chip-amber {
  border-color: var(--htb-amber);
  color: var(--htb-amber);
}
.chip-red {
  border-color: var(--htb-red);
  color: var(--htb-red);
}
.chip-purple {
  border-color: var(--htb-purple);
  color: var(--htb-purple);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  background: var(--htb-card);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:hover {
  background: var(--htb-dark);
  border-color: var(--htb-green);
}

.btn-primary {
  background: var(--htb-green);
  border-color: var(--htb-green);
  color: var(--htb-black);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--htb-green-dark);
  border-color: var(--htb-green-dark);
}

.btn-danger {
  border-color: var(--htb-red);
  color: var(--htb-red);
}

.btn-danger:hover {
  background: var(--htb-red);
  color: var(--htb-black);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.625rem 1rem;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--htb-green);
  box-shadow: 0 0 0 2px rgba(159, 239, 0, 0.1);
}

.form-textarea {
  min-height: 200px;
  resize: vertical;
}

/* Progress bar */
.progress-bar {
  height: 8px;
  background: var(--htb-dark);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--htb-green), var(--htb-cyan));
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.stat-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: rgba(159, 239, 0, 0.1);
  color: var(--htb-green);
}

.stat-card-content {
  flex: 1;
}

.stat-card-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-card-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Module/Exercise Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.content-card {
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  transition: all 0.2s;
}

.content-card:hover {
  border-color: var(--htb-green);
  transform: translateY(-2px);
}

.content-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.content-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.content-card-badge {
  padding: 0.15rem 0.5rem;
  background: rgba(159, 239, 0, 0.1);
  border: 1px solid var(--htb-green);
  border-radius: 4px;
  font-size: 0.7rem;
  color: var(--htb-green);
  text-transform: uppercase;
}

.content-card-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.content-card-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.content-card-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Status indicators */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.375rem;
}

.status-not-started {
  background: var(--text-muted);
}
.status-in-progress {
  background: var(--htb-amber);
}
.status-completed {
  background: var(--htb-green);
}

/* Exercise Types */
.exercise-type {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.exercise-type-multiple_choice {
  background: rgba(168, 85, 247, 0.2);
  color: var(--htb-purple);
}
.exercise-type-fill_command {
  background: rgba(0, 212, 255, 0.2);
  color: var(--htb-cyan);
}
.exercise-type-decision_tree {
  background: rgba(255, 184, 0, 0.2);
  color: var(--htb-amber);
}
.exercise-type-case_file {
  background: rgba(159, 239, 0, 0.2);
  color: var(--htb-green);
}
.exercise-type-command_builder {
  background: rgba(255, 68, 68, 0.2);
  color: var(--htb-red);
}

/* Difficulty badges */
.difficulty {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.difficulty-easy {
  background: rgba(159, 239, 0, 0.2);
  color: var(--htb-green);
}
.difficulty-medium {
  background: rgba(255, 184, 0, 0.2);
  color: var(--htb-amber);
}
.difficulty-hard {
  background: rgba(255, 68, 68, 0.2);
  color: var(--htb-red);
}

/* Plan Day Cards */
.plan-day {
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.plan-day.completed {
  border-color: var(--htb-green);
}

.plan-day-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  background: rgba(0, 0, 0, 0.2);
  cursor: pointer;
}

.plan-day-number {
  width: 48px;
  height: 48px;
  background: var(--htb-dark);
  border: 2px solid var(--htb-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin-right: 1rem;
}

.plan-day.completed .plan-day-number {
  background: var(--htb-green);
  border-color: var(--htb-green);
  color: var(--htb-black);
}

.plan-day-info {
  flex: 1;
}

.plan-day-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
}

.plan-day-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.plan-day-toggle {
  padding: 0.5rem 1rem;
}

.plan-day-body {
  padding: 1.25rem;
  border-top: 1px solid var(--htb-border);
}

.plan-day-section {
  margin-bottom: 1rem;
}

.plan-day-section:last-child {
  margin-bottom: 0;
}

.plan-day-section h4 {
  font-size: 0.8rem;
  color: var(--htb-green);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.plan-day-section ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-secondary);
}

.plan-day-section li {
  margin-bottom: 0.25rem;
}

/* Cheatsheet Styling */
.cheatsheet {
  font-size: 0.9rem;
}

.cheatsheet h3 {
  color: var(--htb-green);
  border-bottom: 1px solid var(--htb-border);
  padding-bottom: 0.5rem;
  margin-top: 1.5rem;
}

.cheatsheet h3:first-child {
  margin-top: 0;
}

.cheatsheet code {
  background: var(--htb-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--htb-cyan);
  font-size: 0.85rem;
}

.cheatsheet pre {
  background: var(--htb-black);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1rem;
  overflow-x: auto;
}

.cheatsheet pre code {
  background: transparent;
  padding: 0;
}

.cheatsheet ul {
  padding-left: 1.5rem;
}

.cheatsheet li {
  margin-bottom: 0.375rem;
}

/* Mind Map Container */
.mindmap-container {
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  overflow-x: auto;
}

.mindmap-container .mermaid {
  width: 100%;
  text-align: center;
}

/* Flashcard */
.flashcard {
  background: var(--htb-card);
  border: 2px solid var(--htb-border);
  border-radius: var(--border-radius);
  min-height: 300px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all 0.3s;
  perspective: 1000px;
}

.flashcard:hover {
  border-color: var(--htb-green);
}

.flashcard-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
}

.flashcard-question {
  font-size: 1.25rem;
  color: var(--text-primary);
}

.flashcard-answer {
  display: none;
  font-size: 1.1rem;
  color: var(--htb-green);
}

.flashcard.flipped .flashcard-question {
  display: none;
}

.flashcard.flipped .flashcard-answer {
  display: block;
}

.flashcard-controls {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  border-top: 1px solid var(--htb-border);
  justify-content: center;
}

.flashcard-controls .btn {
  flex: 1;
  max-width: 120px;
}

/* Search Results */
.search-result {
  padding: 1rem;
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  margin-bottom: 0.75rem;
}

.search-result:hover {
  border-color: var(--htb-green);
}

.search-result-type {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: var(--htb-dark);
  border-radius: 4px;
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--htb-cyan);
  margin-bottom: 0.5rem;
}

.search-result-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.search-result-content {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Command Palette Modal */
.cmd-palette-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  z-index: 1000;
}

.cmd-palette-overlay.active {
  display: flex;
}

.cmd-palette {
  width: 100%;
  max-width: 600px;
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.cmd-palette-input {
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--htb-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
}

.cmd-palette-input:focus {
  outline: none;
}

.cmd-palette-results {
  max-height: 400px;
  overflow-y: auto;
}

.cmd-palette-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: background 0.1s;
}

.cmd-palette-item:hover,
.cmd-palette-item.selected {
  background: rgba(159, 239, 0, 0.1);
}

.cmd-palette-item-type {
  font-size: 0.7rem;
  color: var(--htb-cyan);
  text-transform: uppercase;
  width: 70px;
}

.cmd-palette-item-title {
  flex: 1;
  color: var(--text-primary);
}

/* Notes */
.note-card {
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: all 0.2s;
}

.note-card:hover {
  border-color: var(--htb-green);
}

.note-card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.note-card-preview {
  color: var(--text-muted);
  font-size: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.note-card-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Scanline effect (subtle) */
.scanlines::before {
  content: "";
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.05) 0px,
    rgba(0, 0, 0, 0.05) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: 9999;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

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

th,
td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--htb-border);
}

th {
  background: var(--htb-dark);
  font-weight: 600;
  color: var(--htb-green);
  font-size: 0.8rem;
  text-transform: uppercase;
}

tr:hover {
  background: rgba(159, 239, 0, 0.05);
}

/* Exercise interactive elements */
.exercise-prompt {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  background: var(--htb-dark);
  border-left: 3px solid var(--htb-green);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.exercise-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.exercise-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--htb-card);
  border: 2px solid var(--htb-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s;
}

.exercise-option:hover {
  border-color: var(--htb-green);
}

.exercise-option.selected {
  border-color: var(--htb-cyan);
  background: rgba(0, 212, 255, 0.1);
}

.exercise-option.correct {
  border-color: var(--htb-green);
  background: rgba(159, 239, 0, 0.1);
}

.exercise-option.incorrect {
  border-color: var(--htb-red);
  background: rgba(255, 68, 68, 0.1);
}

.exercise-option-letter {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: 4px;
  font-weight: 600;
}

.exercise-feedback {
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
}

.exercise-feedback.correct {
  background: rgba(159, 239, 0, 0.1);
  border: 1px solid var(--htb-green);
  color: var(--htb-green);
}

.exercise-feedback.incorrect {
  background: rgba(255, 68, 68, 0.1);
  border: 1px solid var(--htb-red);
  color: var(--htb-red);
}

/* Command Builder */
.command-builder {
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
}

.command-builder-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.command-builder-option {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.command-builder-option label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.command-builder-output {
  background: var(--htb-black);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  padding: 1rem;
  font-family: var(--font-mono);
}

.command-builder-output .prompt {
  color: var(--htb-green);
}

/* Empty states */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

/* Category sections */
.category-section {
  margin-bottom: 2rem;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--htb-border);
}

.category-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--htb-green);
  margin: 0;
}

.category-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.breadcrumbs span {
  color: var(--text-muted);
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--htb-card);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.filter-group select {
  padding: 0.375rem 0.75rem;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-wrapper {
    margin-left: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .topbar-stats {
    display: none;
  }
}

/* Utility classes */
.text-green {
  color: var(--htb-green);
}
.text-cyan {
  color: var(--htb-cyan);
}
.text-amber {
  color: var(--htb-amber);
}
.text-red {
  color: var(--htb-red);
}
.text-muted {
  color: var(--text-muted);
}

.mb-0 {
  margin-bottom: 0;
}
.mb-1 {
  margin-bottom: 0.5rem;
}
.mb-2 {
  margin-bottom: 1rem;
}
.mb-3 {
  margin-bottom: 1.5rem;
}

.mt-1 {
  margin-top: 0.5rem;
}
.mt-2 {
  margin-top: 1rem;
}
.mt-3 {
  margin-top: 1.5rem;
}

.d-flex {
  display: flex;
}
.align-center {
  align-items: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-1 {
  gap: 0.5rem;
}
.gap-2 {
  gap: 1rem;
}

.w-full {
  width: 100%;
}

/* Markdown content styling */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  color: var(--htb-green);
  margin-top: 1.5rem;
}

.markdown-content h1:first-child,
.markdown-content h2:first-child,
.markdown-content h3:first-child {
  margin-top: 0;
}

.markdown-content code {
  background: var(--htb-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--htb-cyan);
}

.markdown-content pre {
  background: var(--htb-black);
  border: 1px solid var(--htb-border);
  padding: 1rem;
  border-radius: var(--border-radius);
  overflow-x: auto;
}

.markdown-content pre code {
  background: transparent;
  padding: 0;
}

.markdown-content blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--htb-amber);
  background: rgba(255, 184, 0, 0.1);
  color: var(--htb-amber);
}

.markdown-content ul,
.markdown-content ol {
  padding-left: 1.5rem;
}

.markdown-content li {
  margin-bottom: 0.375rem;
}

.markdown-content table {
  width: 100%;
  margin: 1rem 0;
}

.markdown-content a {
  color: var(--htb-green);
}

/* Animation */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-pulse {
  animation: pulse 2s infinite;
}

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

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

/* Activity List */
.activity-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  transition: all 0.2s;
}

.activity-item:hover {
  border-color: var(--htb-green);
}

.activity-item.completed {
  background: rgba(159, 239, 0, 0.05);
  border-color: rgba(159, 239, 0, 0.3);
}

.activity-item.completed .activity-title {
  text-decoration: line-through;
  opacity: 0.7;
}

.activity-checkbox {
  position: relative;
  cursor: pointer;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.activity-checkbox input {
  opacity: 0;
  position: absolute;
  cursor: pointer;
}

.activity-checkbox .checkmark {
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  background: var(--htb-card);
  border: 2px solid var(--htb-border);
  border-radius: 4px;
  transition: all 0.2s;
}

.activity-checkbox:hover .checkmark {
  border-color: var(--htb-green);
}

.activity-checkbox input:checked ~ .checkmark {
  background: var(--htb-green);
  border-color: var(--htb-green);
}

.activity-checkbox .checkmark::after {
  content: "";
  position: absolute;
  display: none;
  left: 7px;
  top: 3px;
  width: 6px;
  height: 12px;
  border: solid var(--htb-black);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.activity-checkbox input:checked ~ .checkmark::after {
  display: block;
}

.activity-content {
  flex: 1;
  min-width: 0;
}

.activity-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.activity-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Reflection Textarea */
.reflection-textarea {
  width: 100%;
  min-height: 150px;
  padding: 1rem;
  background: var(--htb-dark);
  border: 1px solid var(--htb-border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  resize: vertical;
  transition: border-color 0.2s;
}

.reflection-textarea:focus {
  outline: none;
  border-color: var(--htb-green);
  box-shadow: 0 0 0 2px rgba(159, 239, 0, 0.1);
}

.reflection-textarea::placeholder {
  color: var(--text-muted);
}

/* Plan Overview */
.plan-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  text-align: center;
}

.plan-stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--htb-green);
  margin-bottom: 0.25rem;
}

.plan-stat span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Plan Duration Selector */
.plan-duration-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.plan-duration-option {
  padding: 1.5rem 1rem;
  background: var(--htb-dark);
  border: 2px solid var(--htb-border);
  border-radius: var(--border-radius);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.plan-duration-option:hover {
  border-color: var(--htb-green);
}

.plan-duration-option.active {
  border-color: var(--htb-green);
  background: rgba(159, 239, 0, 0.1);
}

.plan-duration-option .duration {
  font-size: 2rem;
  font-weight: 700;
  color: var(--htb-green);
  display: block;
}

.plan-duration-option .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-top: 0.25rem;
}

.plan-duration-option .desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}