/* ux-enhancements.css — UX/UI 3x Improvement Pack */

/* ============================================
   1. PAGE TRANSITION PROGRESS BAR
   ============================================ */
#page-transition-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary-teal, #12B3B3), var(--clr-accent-hotpink, #FF3B7F));
  z-index: 99999;
  pointer-events: none;
  transition: none;
  opacity: 0;
}

#page-transition-bar.active {
  opacity: 1;
  animation: page-transition-fill 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

#page-transition-bar.complete {
  width: 100% !important;
  opacity: 0;
  transition: opacity 0.3s ease 0.1s;
}

@keyframes page-transition-fill {
  0%   { width: 0; }
  20%  { width: 30%; }
  50%  { width: 60%; }
  80%  { width: 85%; }
  100% { width: 92%; }
}

/* ============================================
   2. BOTTOM NAV BAR (MOBILE)
   ============================================ */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--clr-bg-light, #fff);
  border-top: 1px solid var(--clr-border, #E2E8F0);
  z-index: 9000;
  padding: 0;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.mobile-bottom-nav-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  height: 64px;
  max-width: 500px;
  margin: 0 auto;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-decoration: none;
  color: var(--clr-text-dim, #5B6876);
  font-size: 10px;
  font-weight: 500;
  gap: 4px;
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.bottom-nav-item i {
  font-size: 20px;
  transition: transform 0.15s ease, color 0.15s ease;
}

.bottom-nav-item.active {
  color: var(--clr-primary-teal, #12B3B3);
}

.bottom-nav-item.active i {
  transform: scale(1.1);
}

.bottom-nav-item.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 3px;
  background: var(--clr-primary-teal, #12B3B3);
  border-radius: 0 0 3px 3px;
}

.bottom-nav-item:active i {
  transform: scale(0.92);
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: block;
  }

  /* Add bottom padding to content so it doesn't hide behind nav */
  body.has-bottom-nav {
    padding-bottom: calc(64px + env(safe-area-inset-bottom, 0));
  }

  /* Hide desktop footer on mobile when bottom nav is present */
  body.has-bottom-nav > footer {
    display: none;
  }

  /* Adjust chat input container to sit above bottom nav */
  body.has-bottom-nav #input-container {
    margin-bottom: 0;
  }

  /* Ensure session-stats-bar doesn't overlap */
  body.has-bottom-nav .session-stats-bar {
    margin-bottom: 0;
  }
}

/* Dark mode */
[data-theme="dark"] .mobile-bottom-nav {
  background: #0F1A24;
  border-top-color: #243040;
}

[data-theme="dark"] .bottom-nav-item {
  color: #8B9AAB;
}

[data-theme="dark"] .bottom-nav-item.active {
  color: #14C8C8;
}

[data-theme="dark"] .bottom-nav-item.active::after {
  background: #14C8C8;
}

/* ============================================
   3. SKELETON SCREENS
   ============================================ */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 8px;
}

@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
  border-radius: 4px;
}

.skeleton-text.short { width: 40%; }
.skeleton-text.medium { width: 65%; }
.skeleton-text.long { width: 90%; }

.skeleton-heading {
  height: 24px;
  width: 50%;
  margin-bottom: 16px;
  border-radius: 6px;
}

.skeleton-card {
  background: var(--clr-bg-light, white);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid var(--clr-border-light, #f0f0f0);
}

.skeleton-card .skeleton-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.skeleton-card .skeleton-bar {
  height: 8px;
  border-radius: 4px;
  margin-top: 12px;
}

.skeleton-card .skeleton-btn {
  height: 48px;
  border-radius: 12px;
  margin-top: 16px;
}

.skeleton-chat-message {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  align-items: flex-start;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-message-body {
  flex: 1;
}

.skeleton-message-line {
  height: 12px;
  margin-bottom: 6px;
  border-radius: 4px;
}

/* Dark mode skeleton */
[data-theme="dark"] .skeleton {
  background: linear-gradient(90deg, #1A2633 25%, #243040 50%, #1A2633 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

[data-theme="dark"] .skeleton-card {
  background: #141E29;
  border-color: #243040;
}

/* ============================================
   4. STRUCTURED PROBLEM CARDS
   ============================================ */
.problem-card {
  background: linear-gradient(135deg, #f0f9ff 0%, #e8f4fd 100%);
  border: 2px solid #bae6fd;
  border-radius: 16px;
  padding: 20px 24px;
  margin: 12px 0;
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-primary-teal, #12B3B3), #3b82f6);
}

.problem-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-primary-teal, #12B3B3);
}

.problem-card-header i {
  font-size: 14px;
}

.problem-card-body {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--clr-text, #18202B);
  margin-bottom: 16px;
}

.problem-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.problem-card-actions .problem-action-btn {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid #d1d5db;
  background: white;
  color: #374151;
}

.problem-card-actions .problem-action-btn:hover {
  background: var(--clr-primary-teal, #12B3B3);
  color: white;
  border-color: var(--clr-primary-teal, #12B3B3);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(18, 179, 179, 0.25);
}

.problem-card-actions .problem-action-btn i {
  margin-right: 4px;
}

/* Problem result feedback */
.problem-result-correct {
  animation: correct-flash 0.5s ease;
}

@keyframes correct-flash {
  0% { background-color: transparent; }
  30% { background-color: rgba(22, 200, 109, 0.15); }
  100% { background-color: transparent; }
}

.problem-result-incorrect {
  animation: incorrect-shake 0.4s ease;
}

@keyframes incorrect-shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-4px); }
  30% { transform: translateX(4px); }
  45% { transform: translateX(-3px); }
  60% { transform: translateX(3px); }
  75% { transform: translateX(-1px); }
}

/* Dark mode problem card */
[data-theme="dark"] .problem-card {
  background: linear-gradient(135deg, #0c2135 0%, #0f2942 100%);
  border-color: #1e4a6e;
}

[data-theme="dark"] .problem-card-body {
  color: #F0F4F8;
}

[data-theme="dark"] .problem-card-actions .problem-action-btn {
  background: #1A2633;
  border-color: #374151;
  color: #D1D5DB;
}

[data-theme="dark"] .problem-card-actions .problem-action-btn:hover {
  background: #14C8C8;
  color: #0F1A24;
}

/* ============================================
   5. ENHANCED BADGE CEREMONY
   ============================================ */
.badge-ceremony-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: ceremony-fade-in 0.4s ease forwards;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

@keyframes ceremony-fade-in {
  to { opacity: 1; }
}

.badge-ceremony-content {
  text-align: center;
  max-width: 360px;
  padding: 40px 32px;
  position: relative;
}

.badge-ceremony-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #FFD700;
  margin-bottom: 20px;
  opacity: 0;
  animation: ceremony-slide-up 0.5s ease 0.3s forwards;
}

.badge-ceremony-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.2) 0%, transparent 70%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
  opacity: 0;
  transform: scale(0.3);
  animation: ceremony-badge-pop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s forwards;
  position: relative;
}

.badge-ceremony-icon::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid rgba(255, 215, 0, 0.3);
  animation: ceremony-ring-pulse 1.5s ease-in-out 0.8s infinite;
}

@keyframes ceremony-badge-pop {
  to { opacity: 1; transform: scale(1); }
}

@keyframes ceremony-ring-pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.15); opacity: 0; }
}

.badge-ceremony-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
  opacity: 0;
  animation: ceremony-slide-up 0.5s ease 0.5s forwards;
}

.badge-ceremony-description {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
  line-height: 1.5;
  opacity: 0;
  animation: ceremony-slide-up 0.5s ease 0.65s forwards;
}

.badge-ceremony-xp {
  display: inline-block;
  background: linear-gradient(135deg, #FFD700, #FFA500);
  color: #1a1a2e;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 8px 24px;
  border-radius: 20px;
  margin-bottom: 24px;
  opacity: 0;
  animation: ceremony-slide-up 0.5s ease 0.8s forwards;
}

.badge-ceremony-dismiss {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.8);
  padding: 10px 28px;
  border-radius: 24px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  opacity: 0;
  animation: ceremony-slide-up 0.5s ease 0.95s forwards;
}

.badge-ceremony-dismiss:hover {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

@keyframes ceremony-slide-up {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Shimmer effect on badge icon */
.badge-ceremony-icon .badge-shimmer {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    rgba(255, 215, 0, 0.15) 60deg,
    transparent 120deg
  );
  animation: shimmer-rotate 3s linear infinite;
}

@keyframes shimmer-rotate {
  to { transform: rotate(360deg); }
}

/* ============================================
   6. DASHBOARD HERO SECTION
   ============================================ */
.dashboard-hero {
  background: linear-gradient(135deg, #f0fdfa 0%, #e0f9f4 50%, #f0f9ff 100%);
  border: 1px solid rgba(18, 179, 179, 0.15);
  border-radius: 20px;
  padding: 28px 32px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
  overflow: hidden;
}

.dashboard-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18, 179, 179, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.dashboard-hero-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--clr-primary-teal, #12B3B3), #0a9f9f);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(18, 179, 179, 0.3);
}

.dashboard-hero-body {
  flex: 1;
  min-width: 0;
}

.dashboard-hero-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-text, #18202B);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dashboard-hero-subtitle {
  font-size: 0.9rem;
  color: var(--clr-text-dim, #5B6876);
  margin-bottom: 8px;
}

.dashboard-hero-progress {
  height: 8px;
  background: rgba(18, 179, 179, 0.12);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 4px;
}

.dashboard-hero-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #12B3B3, #0FB5B5);
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.dashboard-hero-meta {
  font-size: 0.8rem;
  color: var(--clr-text-dim, #5B6876);
}

.dashboard-hero-cta {
  background: linear-gradient(135deg, var(--clr-primary-teal, #12B3B3), #0a9f9f);
  color: white;
  border: none;
  padding: 12px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(18, 179, 179, 0.25);
  flex-shrink: 0;
}

.dashboard-hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(18, 179, 179, 0.35);
}

.dashboard-hero-cta:active {
  transform: translateY(0);
}

.dashboard-hero-cta i {
  margin-right: 6px;
}

/* Streak/Quest strip */
.streak-quest-strip {
  display: flex;
  gap: 16px;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.streak-quest-strip::-webkit-scrollbar {
  display: none;
}

.streak-item,
.quest-strip-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: white;
  border: 1px solid var(--clr-border-light, #f0f0f0);
  border-radius: 12px;
  padding: 12px 16px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform 0.2s, box-shadow 0.2s;
}

.streak-item:hover,
.quest-strip-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.streak-item-icon {
  font-size: 1.4rem;
}

.streak-item-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--clr-text, #18202B);
}

.streak-item-label {
  font-size: 0.75rem;
  color: var(--clr-text-dim, #5B6876);
}

.quest-strip-progress {
  width: 80px;
  height: 6px;
  background: #e8f0f0;
  border-radius: 3px;
  overflow: hidden;
}

.quest-strip-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #12B3B3, #16C86D);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Weekly summary card */
.weekly-summary-card {
  background: white;
  border-radius: 16px;
  padding: 20px 24px;
  border: 1px solid var(--clr-border-light, #f0f0f0);
  margin-bottom: 1.5rem;
}

.weekly-summary-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--clr-text-dim, #5B6876);
  margin-bottom: 12px;
}

.weekly-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.weekly-stat {
  text-align: center;
}

.weekly-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text, #18202B);
  display: block;
}

.weekly-stat-label {
  font-size: 0.75rem;
  color: var(--clr-text-dim, #5B6876);
}

/* Dark mode hero & strips */
[data-theme="dark"] .dashboard-hero {
  background: linear-gradient(135deg, #0c1f2e 0%, #0f2535 50%, #0c1a2e 100%);
  border-color: rgba(20, 200, 200, 0.15);
}

[data-theme="dark"] .dashboard-hero-title { color: #F0F4F8; }
[data-theme="dark"] .dashboard-hero-subtitle { color: #8B9AAB; }
[data-theme="dark"] .dashboard-hero-progress { background: rgba(20, 200, 200, 0.1); }

[data-theme="dark"] .streak-item,
[data-theme="dark"] .quest-strip-item {
  background: #141E29;
  border-color: #243040;
}

[data-theme="dark"] .streak-item-value { color: #F0F4F8; }
[data-theme="dark"] .streak-item-label { color: #8B9AAB; }

[data-theme="dark"] .weekly-summary-card {
  background: #141E29;
  border-color: #243040;
}

[data-theme="dark"] .weekly-stat-value { color: #F0F4F8; }

/* ============================================
   GROWTH DELTAS STRIP (Progress Principle)
   Shows trajectory, not absolutes: "up 15%" > "82%"
   ============================================ */
.growth-deltas-strip {
  display: flex;
  gap: 12px;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.growth-deltas-strip::-webkit-scrollbar { display: none; }

.growth-delta-item {
  display: none; /* shown via JS when data exists */
  align-items: center;
  gap: 8px;
  background: white;
  border: 1px solid var(--clr-border-light, #f0f0f0);
  border-radius: 12px;
  padding: 10px 16px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.growth-delta-item:hover { transform: translateY(-1px); }

.growth-delta-arrow {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1;
}

.growth-delta-value {
  font-size: 0.95rem;
  font-weight: 700;
}

.growth-delta-label {
  font-size: 0.75rem;
  color: var(--clr-text-dim, #5B6876);
  font-weight: 500;
}

[data-theme="dark"] .growth-delta-item {
  background: #141E29;
  border-color: #243040;
}

[data-theme="dark"] .growth-delta-label { color: #8899AA; }

@media (max-width: 600px) {
  .growth-deltas-strip { gap: 8px; }
  .growth-delta-item { padding: 8px 12px; }
}

/* ============================================
   7. DYNAMIC SUGGESTION CHIPS (ENHANCED)
   ============================================ */
.suggestion-chip-enhanced {
  background: white;
  border: 1.5px solid var(--clr-border, #E2E8F0);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--clr-text, #374151);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.suggestion-chip-enhanced:hover {
  background: var(--clr-primary-teal, #12B3B3);
  color: white;
  border-color: var(--clr-primary-teal, #12B3B3);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(18, 179, 179, 0.25);
}

.suggestion-chip-enhanced:active {
  transform: scale(0.97);
}

.suggestion-chip-enhanced .chip-emoji {
  font-size: 15px;
}

[data-theme="dark"] .suggestion-chip-enhanced {
  background: #1A2633;
  border-color: #374151;
  color: #D1D5DB;
}

[data-theme="dark"] .suggestion-chip-enhanced:hover {
  background: #14C8C8;
  color: #0F1A24;
  border-color: #14C8C8;
}

/* ============================================
   8. ONBOARDING WIZARD STEPPER
   ============================================ */
.onboarding-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 0 auto 32px;
  max-width: 480px;
  padding: 0 20px;
}

.stepper-step {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

.stepper-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--clr-border-light, #E2E8F0);
  color: var(--clr-text-dim, #5B6876);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.stepper-step.active .stepper-circle {
  background: var(--clr-primary-teal, #12B3B3);
  color: white;
  box-shadow: 0 0 0 4px rgba(18, 179, 179, 0.15);
}

.stepper-step.completed .stepper-circle {
  background: var(--clr-success-green, #16C86D);
  color: white;
}

.stepper-step.completed .stepper-circle::after {
  content: '\f00c'; /* Font Awesome check */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
}

.stepper-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--clr-text-dim, #5B6876);
  white-space: nowrap;
}

.stepper-step.active .stepper-label {
  color: var(--clr-primary-teal, #12B3B3);
  font-weight: 600;
}

.stepper-step.completed .stepper-label {
  color: var(--clr-success-green, #16C86D);
}

.stepper-connector {
  width: 40px;
  height: 2px;
  background: var(--clr-border-light, #E2E8F0);
  margin: 0 4px;
  flex-shrink: 0;
  transition: background 0.3s ease;
}

.stepper-connector.completed {
  background: var(--clr-success-green, #16C86D);
}

/* Wizard panel transitions */
.wizard-panel {
  display: none;
  animation: wizard-slide-in 0.35s ease forwards;
}

.wizard-panel.active {
  display: block;
}

@keyframes wizard-slide-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Mobile responsive stepper */
@media (max-width: 480px) {
  .stepper-label {
    display: none;
  }

  .stepper-connector {
    width: 24px;
  }

  .onboarding-stepper {
    gap: 0;
  }
}

/* ============================================
   9. THINKING INDICATOR (TUTOR-SPECIFIC)
   ============================================ */
.thinking-indicator-text {
  font-style: italic;
  color: var(--clr-text-dim, #5B6876);
}

/* ============================================
   10. MESSAGE GROUPING & VISUAL RHYTHM
   ============================================ */
.message-container.ai + .message-container.ai {
  margin-top: -4px;
}

.message-container.ai + .message-container.user,
.message-container.user + .message-container.ai {
  margin-top: 16px;
}

/* ============================================
   11. UNIVERSAL MICRO-INTERACTIONS
   ============================================ */
.interactive-press {
  transition: transform 0.1s ease;
}

.interactive-press:active {
  transform: scale(0.97) !important;
}

/* ============================================
   12. MOBILE HERO RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .dashboard-hero {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .dashboard-hero-icon {
    width: 56px;
    height: 56px;
    font-size: 24px;
  }

  .dashboard-hero-title {
    white-space: normal;
  }

  .dashboard-hero-cta {
    width: 100%;
  }

  .weekly-summary-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

/* ============================================
   13. PREFETCH LINK INDICATOR
   ============================================ */
[data-prefetched]::after {
  /* No visual indicator needed, just a data attribute for tracking */
}

/* ============================================
   14. TOAST NOTIFICATION SYSTEM
   Global async feedback for user actions
   ============================================ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast, 10000);
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-3);
  pointer-events: none;
  max-width: 420px;
  width: calc(100% - var(--space-8));
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--clr-bg-light, #fff);
  border: 1px solid var(--clr-border, #E2E8F0);
  border-radius: var(--radius-md, 12px);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0, 0, 0, 0.03);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(16px) scale(0.97);
  animation: toast-enter 0.35s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--clr-text, #18202B);
}

.toast.toast-exiting {
  animation: toast-exit 0.25s cubic-bezier(0.4, 0, 1, 1) forwards;
}

@keyframes toast-enter {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

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

.toast-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: white;
}

.toast-body {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.toast-message {
  font-size: 0.825rem;
  color: var(--clr-text-dim, #5B6876);
}

.toast-dismiss {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--clr-text-dim, #5B6876);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  font-size: 18px;
  line-height: 1;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.toast-dismiss:hover {
  color: var(--clr-text);
  background: rgba(0, 0, 0, 0.05);
}

/* Toast variants */
.toast--success .toast-icon { background: var(--clr-success-green, #16C86D); }
.toast--success { border-left: 3px solid var(--clr-success-green, #16C86D); }

.toast--error .toast-icon { background: var(--clr-error-red, #FF4E4E); }
.toast--error { border-left: 3px solid var(--clr-error-red, #FF4E4E); }

.toast--warning .toast-icon { background: var(--clr-warning-gold, #FFC24B); }
.toast--warning { border-left: 3px solid var(--clr-warning-gold, #FFC24B); }

.toast--info .toast-icon { background: var(--clr-primary-teal, #12B3B3); }
.toast--info { border-left: 3px solid var(--clr-primary-teal, #12B3B3); }

.toast--xp .toast-icon {
  background: linear-gradient(135deg, #FFD700, #FFA500);
  font-size: 14px;
}
.toast--xp { border-left: 3px solid #FFD700; }

/* Toast progress bar (auto-dismiss timer) */
.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--clr-primary-teal, #12B3B3);
  border-radius: 0 0 0 var(--radius-md);
  animation: toast-progress-shrink var(--toast-duration, 4s) linear forwards;
}

@keyframes toast-progress-shrink {
  from { width: 100%; }
  to { width: 0%; }
}

/* Dark mode toast */
[data-theme="dark"] .toast {
  background: #1A2633;
  border-color: #374151;
  color: #F0F4F8;
}

[data-theme="dark"] .toast-dismiss:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* Mobile toast adjustments */
@media (max-width: 768px) {
  .toast-container {
    bottom: calc(72px + env(safe-area-inset-bottom, 0px));
    max-width: calc(100% - var(--space-6));
  }
}

/* ============================================
   15. EMPTY STATE COMPONENT
   Illustrated empty states with CTAs
   ============================================ */
.empty-state-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
  max-width: 400px;
  margin: 0 auto;
}

.empty-state-illustration {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(var(--clr-primary-teal-rgb), 0.08), rgba(var(--clr-primary-teal-rgb), 0.03));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  position: relative;
}

.empty-state-illustration i {
  font-size: 2.5rem;
  color: var(--clr-primary-teal, #12B3B3);
  opacity: 0.6;
}

/* Subtle floating dots decoration around illustration */
.empty-state-illustration::before,
.empty-state-illustration::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(var(--clr-primary-teal-rgb), 0.15);
}

.empty-state-illustration::before {
  width: 12px;
  height: 12px;
  top: 8px;
  right: -4px;
  animation: empty-float 3s ease-in-out infinite;
}

.empty-state-illustration::after {
  width: 8px;
  height: 8px;
  bottom: 12px;
  left: -2px;
  animation: empty-float 3s ease-in-out 1.5s infinite;
}

@keyframes empty-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.empty-state-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--clr-text, #18202B);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: 0.9rem;
  color: var(--clr-text-dim, #5B6876);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

.empty-state-action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: linear-gradient(135deg, var(--clr-primary-teal, #12B3B3), #0a9f9f);
  color: white;
  border: none;
  border-radius: var(--radius-base);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 4px 12px rgba(var(--clr-primary-teal-rgb), 0.25);
}

.empty-state-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--clr-primary-teal-rgb), 0.35);
}

.empty-state-action:active {
  transform: translateY(0);
}

/* Empty state variants */
.empty-state-container--chat .empty-state-illustration {
  background: linear-gradient(135deg, rgba(var(--clr-primary-teal-rgb), 0.06), rgba(var(--clr-accent-hotpink-rgb), 0.04));
}

.empty-state-container--chat .empty-state-illustration i {
  color: var(--clr-primary-teal);
}

/* Dark mode empty states */
[data-theme="dark"] .empty-state-illustration {
  background: linear-gradient(135deg, rgba(var(--clr-primary-teal-rgb), 0.12), rgba(var(--clr-primary-teal-rgb), 0.04));
}

[data-theme="dark"] .empty-state-title { color: #F0F4F8; }
[data-theme="dark"] .empty-state-description { color: #8B9AAB; }

/* ============================================
   16. STYLED LOADING INDICATORS
   Consistent loading patterns across the app
   ============================================ */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10);
  gap: var(--space-4);
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(var(--clr-primary-teal-rgb), 0.15);
  border-top-color: var(--clr-primary-teal, #12B3B3);
  border-radius: 50%;
  animation: loading-spin 0.7s linear infinite;
}

.loading-spinner--sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.loading-spinner--lg {
  width: 48px;
  height: 48px;
  border-width: 4px;
}

@keyframes loading-spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 0.9rem;
  color: var(--clr-text-dim, #5B6876);
  font-weight: 500;
}

/* Pulse dot loader (for chat thinking) */
.pulse-loader {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: var(--space-2);
}

.pulse-loader .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-primary-teal, #12B3B3);
  animation: pulse-dot 1.2s ease-in-out infinite;
}

.pulse-loader .dot:nth-child(2) { animation-delay: 0.2s; }
.pulse-loader .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse-dot {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* ============================================
   17. CONFIRMATION DIALOG
   For destructive actions
   ============================================ */
.confirm-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: var(--blur-sm, blur(4px));
  z-index: var(--z-modal, 9999);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: toast-enter 0.2s ease forwards;
}

.confirm-dialog {
  background: var(--clr-bg-light, #fff);
  border-radius: var(--radius-lg, 16px);
  padding: var(--space-8);
  max-width: 400px;
  width: calc(100% - var(--space-8));
  box-shadow: var(--shadow-xl);
  text-align: center;
}

.confirm-dialog-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.confirm-dialog-icon--danger {
  background: rgba(255, 78, 78, 0.1);
  color: var(--clr-error-red, #FF4E4E);
}

.confirm-dialog-icon--warning {
  background: rgba(255, 194, 75, 0.1);
  color: var(--clr-warning-gold, #FFC24B);
}

.confirm-dialog-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--clr-text);
}

.confirm-dialog-message {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  line-height: 1.5;
  margin-bottom: var(--space-6);
}

.confirm-dialog-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

.confirm-dialog-actions .btn {
  flex: 1;
  max-width: 160px;
}

[data-theme="dark"] .confirm-dialog {
  background: #1A2633;
}

/* ============================================
   18. DASHBOARD CARD VARIANTS
   Visual differentiation by card type
   ============================================ */
.dashboard-card--progress {
  border-top: 3px solid var(--clr-primary-teal, #12B3B3);
}

.dashboard-card--progress .card-icon {
  background: rgba(var(--clr-primary-teal-rgb), 0.1);
  color: var(--clr-primary-teal);
}

.dashboard-card--learning {
  border-top: 3px solid #6366f1;
}

.dashboard-card--learning .card-icon {
  background: rgba(99, 102, 241, 0.1);
  color: #6366f1;
}

.dashboard-card--assessment {
  border-top: 3px solid var(--clr-success-green, #16C86D);
}

.dashboard-card--assessment .card-icon {
  background: rgba(var(--clr-success-green-rgb), 0.1);
  color: var(--clr-success-green);
}

.dashboard-card--game {
  border-top: 3px solid var(--clr-accent-hotpink, #FF3B7F);
}

.dashboard-card--game .card-icon {
  background: rgba(var(--clr-accent-hotpink-rgb), 0.1);
  color: var(--clr-accent-hotpink);
}

.dashboard-card--streak {
  border-top: 3px solid var(--clr-warning-gold, #FFC24B);
}

.dashboard-card--streak .card-icon {
  background: rgba(255, 194, 75, 0.1);
  color: var(--clr-warning-gold);
}

/* Animated card entrance stagger */
.dashboard-grid > .dashboard-card {
  opacity: 0;
  transform: translateY(12px);
  animation: card-enter 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.dashboard-grid > .dashboard-card:nth-child(1) { animation-delay: 0.05s; }
.dashboard-grid > .dashboard-card:nth-child(2) { animation-delay: 0.1s; }
.dashboard-grid > .dashboard-card:nth-child(3) { animation-delay: 0.15s; }
.dashboard-grid > .dashboard-card:nth-child(4) { animation-delay: 0.2s; }
.dashboard-grid > .dashboard-card:nth-child(5) { animation-delay: 0.25s; }
.dashboard-grid > .dashboard-card:nth-child(6) { animation-delay: 0.3s; }

@keyframes card-enter {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   19. INLINE FORM VALIDATION
   Per-field error states
   ============================================ */
.form-field-error input,
.form-field-error textarea,
.form-field-error select {
  border-color: var(--clr-error-red, #FF4E4E) !important;
  box-shadow: 0 0 0 3px rgba(255, 78, 78, 0.1);
}

.form-error-message {
  display: block;
  font-size: 0.8rem;
  color: var(--clr-error-red, #FF4E4E);
  margin-top: var(--space-1);
  padding-left: var(--space-1);
}

.form-error-message::before {
  content: '\f06a'; /* Font Awesome exclamation-circle */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  margin-right: var(--space-1);
  font-size: 0.75rem;
}

.form-field-success input,
.form-field-success textarea {
  border-color: var(--clr-success-green, #16C86D) !important;
}

/* ============================================
   20. TOOLTIP SYSTEM
   For icon-only buttons
   ============================================ */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 6px 12px;
  background: var(--clr-bg-dark, #0F1A24);
  color: white;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  border-radius: var(--radius-sm, 6px);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: var(--z-dropdown, 100);
}

[data-tooltip]:hover::after,
[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

[data-theme="dark"] [data-tooltip]::after {
  background: #F0F4F8;
  color: #0F1A24;
}