/* Coding Typing Hub Styles */
.ct-hub { display: none; }
.ct-hub.is-active { display: block; }

/* Main layout: side-by-side panels on desktop, single column on mobile */
.coding-typing-hub {
  display: none;
  position: absolute;
  top: 120px;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  background: var(--bg-main, #0f172a);
  z-index: 5;
}

body.mode-coding-typing .coding-typing-hub {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 0;
  padding: 16px;
}

/* Left panel (library) */
.ct-panel {
  overflow-y: auto;
  padding: 12px;
}

.ct-library-panel {
  border-right: 1px solid var(--border-color, #1e293b);
}

.ct-title {
  margin: 0 0 4px;
  font-size: 20px;
  color: var(--text-main, #e2e8f0);
}

.ct-subtitle {
  margin: 0 0 18px;
  color: var(--text-muted, #94a3b8);
  font-size: 12px;
  line-height: 1.6;
}

.ct-field {
  margin-bottom: 14px;
}

.ct-field label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted, #64748b);
  margin-bottom: 6px;
}

/* Language tabs */
.ct-lang-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.ct-lang-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 6px;
  background: var(--bg-card, #1e293b);
  color: var(--text-main, #cbd5e1);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}

.ct-lang-tab:hover {
  background: var(--bg-hover, #334155);
  border-color: var(--accent, #6366f1);
}

.ct-lang-tab.active {
  background: var(--accent, #6366f1);
  border-color: var(--accent, #6366f1);
  color: #fff;
}

/* Category list */
.ct-cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.ct-cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
  font-size: 11px;
  transition: all 0.15s;
}

.ct-cat-btn:hover {
  background: var(--bg-hover, #334155);
  color: var(--text-main, #e2e8f0);
}

.ct-cat-btn.active {
  background: var(--accent-dim, #312e81);
  border-color: var(--accent, #6366f1);
  color: var(--accent-light, #a5b4fc);
}

/* Item list */
.ct-item-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ct-item-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-main, #cbd5e1);
  cursor: pointer;
  font-size: 12px;
  text-align: left;
  transition: background 0.15s;
}

.ct-item-btn:hover {
  background: var(--bg-hover, #1e293b);
}

.ct-item-btn.active {
  background: var(--accent, #6366f1);
  color: #fff;
}

.ct-item-btn .ct-item-id {
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted, #64748b);
  min-width: 70px;
}

.ct-item-btn.active .ct-item-id {
  color: rgba(255,255,255,0.7);
}

/* Main panel (right side) */
.ct-main-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-left: 20px;
}

/* Toolbar */
.ct-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ct-primary-btn {
  padding: 6px 14px;
  border: none;
  border-radius: 6px;
  background: var(--accent, #6366f1);
  color: #fff;
  cursor: pointer;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: background 0.15s;
}

.ct-primary-btn:hover {
  background: var(--accent-hover, #4f46e5);
}

.ct-secondary-btn {
  padding: 6px 12px;
  border: 1px solid var(--border-color, #334155);
  border-radius: 6px;
  background: var(--bg-card, #1e293b);
  color: var(--text-main, #cbd5e1);
  cursor: pointer;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}

.ct-secondary-btn:hover {
  background: var(--bg-hover, #334155);
  border-color: var(--accent, #6366f1);
}

.ct-toolbar-spacer {
  flex: 1;
}

.ct-opt-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
}

.ct-opt-label input[type="checkbox"] {
  accent-color: var(--accent, #6366f1);
}

/* Workspace */
.ct-workspace {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  overflow-y: auto;
}

/* Code section */
.ct-code-section {
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 8px;
  overflow: hidden;
}

.ct-code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-card, #1e293b);
  border-bottom: 1px solid var(--border-color, #1e293b);
}

.ct-code-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted, #64748b);
}

.ct-item-meta {
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
  font-family: monospace;
}

.ct-code-display {
  margin: 0;
  padding: 16px;
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
  color: var(--text-main, #e2e8f0);
  background: var(--bg-code, #0f172a);
  min-height: 60px;
  max-height: 250px;
  overflow-y: auto;
}

/* Info section */
.ct-info-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 8px;
}

.ct-item-title {
  margin: 0;
  font-size: 15px;
  color: var(--text-main, #e2e8f0);
}

.ct-explanation {
  font-size: 12px;
  color: var(--text-main, #cbd5e1);
  line-height: 1.5;
}

.ct-focus {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.ct-focus-tag {
  display: inline-block;
  padding: 2px 6px;
  font-size: 10px;
  background: var(--accent-dim, #312e81);
  color: var(--accent-light, #a5b4fc);
  border-radius: 3px;
}

.ct-hint {
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
  font-style: italic;
}

/* Input section */
.ct-input-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ct-input-section label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted, #64748b);
}

.ct-textarea {
  width: 100%;
  min-height: 80px;
  padding: 12px;
  border: 1px solid var(--border-color, #334155);
  border-radius: 8px;
  background: var(--bg-input, #1e293b);
  color: var(--text-main, #e2e8f0);
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.7;
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}

.ct-textarea:focus {
  border-color: var(--accent, #6366f1);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Compare display */
.ct-compare-section {
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 8px;
  overflow: hidden;
}

.ct-compare-display {
  padding: 12px;
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
  min-height: 40px;
  background: var(--bg-code, #0f172a);
}

.ct-char {
  position: relative;
}

.ct-char.correct {
  color: #22c55e;
}

.ct-char.incorrect {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.2);
  border-radius: 2px;
  text-decoration: underline wavy #ef4444;
}

.ct-char.current {
  background: rgba(99, 102, 241, 0.3);
  border-radius: 2px;
  animation: ct-cursor-blink 1s step-end infinite;
}

.ct-char.extra {
  color: #f97316;
  background: rgba(249, 115, 22, 0.15);
  border-radius: 2px;
}

@keyframes ct-cursor-blink {
  50% { background: transparent; }
}

/* Stats */
.ct-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 8px;
}

.ct-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.ct-stat span {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted, #64748b);
}

.ct-stat strong {
  font-size: 16px;
  color: var(--text-main, #e2e8f0);
  font-variant-numeric: tabular-nums;
}

/* Result overlay */
.ct-result {
  text-align: center;
  padding: 24px;
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #1e293b);
  border-radius: 8px;
}

.ct-result h3 {
  margin: 0 0 8px;
  font-size: 20px;
  color: #22c55e;
}

.ct-result p {
  margin: 0 0 16px;
  color: var(--text-muted, #94a3b8);
  font-size: 13px;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .coding-typing-hub {
    top: 132px;
  }
  
  body.mode-coding-typing .coding-typing-hub {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 12px;
  }
  
  .ct-library-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-color, #1e293b);
    padding-bottom: 12px;
    margin-bottom: 4px;
    max-height: 40vh;
    overflow-y: auto;
  }
  
  .ct-main-panel {
    padding-left: 0;
  }
  
  .ct-code-display {
    font-size: 12px;
    padding: 10px;
    max-height: 180px;
  }
  
  .ct-textarea {
    font-size: 12px;
    min-height: 60px;
  }
  
  .ct-compare-display {
    font-size: 12px;
    padding: 10px;
  }
  
  .ct-toolbar {
    gap: 4px;
  }
  
  .ct-primary-btn, .ct-secondary-btn {
    font-size: 11px;
    padding: 5px 10px;
  }
}

/* Light theme overrides */
body[data-theme="light"] .coding-typing-hub {
  background: var(--bg-main, #f8fafc);
}

body[data-theme="light"] .ct-code-display {
  background: var(--bg-code, #f1f5f9);
}

body[data-theme="light"] .ct-compare-display {
  background: var(--bg-code, #f1f5f9);
}

body[data-theme="light"] .ct-lang-tab {
  background: var(--bg-card, #ffffff);
  border-color: var(--border-color, #e2e8f0);
  color: var(--text-main, #334155);
}

body[data-theme="light"] .ct-lang-tab.active {
  background: var(--accent, #6366f1);
  color: #fff;
}

body[data-theme="light"] .ct-secondary-btn {
  background: var(--bg-card, #ffffff);
  border-color: var(--border-color, #e2e8f0);
  color: var(--text-main, #334155);
}

body[data-theme="light"] .ct-stat strong {
  color: var(--text-main, #1e293b);
}

/* Stats summary cards */
.ct-stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: 16px;
}
.ct-stat-card {
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #334155);
  border-radius: 6px;
  padding: 10px;
  text-align: center;
}
.ct-stat-card-label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted, #94a3b8);
  margin-bottom: 4px;
}
.ct-stat-card-value {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main, #e2e8f0);
}

/* History filters */
.ct-history-controls {
  margin-top: 12px;
  padding: 10px;
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #334155);
  border-radius: 6px;
}
.ct-history-controls h4 {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--text-main, #e2e8f0);
}
.ct-history-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.ct-hist-select {
  padding: 4px 8px;
  border: 1px solid var(--border-color, #334155);
  border-radius: 4px;
  background: var(--bg-main, #0f172a);
  color: var(--text-main, #e2e8f0);
  font-size: 12px;
  min-width: 100px;
}
.ct-clear-history-btn {
  padding: 5px 12px;
  border: 1px solid #ef4444;
  border-radius: 4px;
  background: transparent;
  color: #ef4444;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
}
.ct-clear-history-btn:hover {
  background: #ef4444;
  color: #fff;
}
.ct-history-count {
  font-size: 11px;
  color: var(--text-muted, #94a3b8);
  font-weight: 400;
}

/* Common mistakes cross-session */
.ct-common-mistakes {
  margin-top: 12px;
}
.ct-common-mistakes-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.ct-mistake-tag {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px 8px;
  background: var(--bg-card, #1e293b);
  border: 1px solid var(--border-color, #334155);
  border-radius: 4px;
  font-size: 12px;
  color: #f87171;
}
.ct-mistake-tag code {
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  color: #f87171;
}
.ct-mistake-tag small {
  font-size: 10px;
  color: var(--text-muted, #94a3b8);
}

/* Difficulty filter buttons */
.ct-diff-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.ct-diff-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--border-color, #334155);
  border-radius: 4px;
  background: var(--bg-card, #1e293b);
  color: var(--text-main, #cbd5e1);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
}
.ct-diff-btn.active {
  background: var(--accent, #6366f1);
  color: #fff;
  border-color: var(--accent, #6366f1);
}

/* History list adjustments */
.ct-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Light theme */
body[data-theme="light"] .ct-stat-card {
  background: var(--bg-card, #ffffff);
  border-color: var(--border-color, #e2e8f0);
}
body[data-theme="light"] .ct-stat-card-value {
  color: var(--text-main, #1e293b);
}
body[data-theme="light"] .ct-history-controls {
  background: var(--bg-card, #ffffff);
  border-color: var(--border-color, #e2e8f0);
}
body[data-theme="light"] .ct-hist-select {
  background: var(--bg-main, #f8fafc);
  border-color: var(--border-color, #e2e8f0);
  color: var(--text-main, #334155);
}
body[data-theme="light"] .ct-mistake-tag {
  background: var(--bg-card, #ffffff);
}
body[data-theme="light"] .ct-diff-btn {
  background: var(--bg-card, #ffffff);
  border-color: var(--border-color, #e2e8f0);
  color: var(--text-main, #334155);
}

/* Mobile */
@media (max-width: 768px) {
  .ct-stats-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .ct-history-filter-row {
    flex-direction: column;
  }
  .ct-hist-select {
    width: 100%;
  }
}