/**
 * Mind Changer - Styles
 *
 * Extracted and extended from inline <style> in index.html.
 * Organized for mobile-first responsive design.
 *
 * STRUCTURE:
 * 1. CSS Variables (design tokens)
 * 2. Base styles
 * 3. Component styles
 * 4. Layout utilities
 * 5. Screen-specific styles
 * 6. Responsive overrides
 * 7. Animations
 */

/* =============================================================================
   1. CSS VARIABLES (Design Tokens)
   ============================================================================= */

:root {
  /* Colors - Primary (Warm Terracotta) */
  --color-primary: #b86342;
  --color-primary-light: #d4826a;
  --color-primary-dark: #944f35;
  --color-primary-bg: #fdf5f2;

  /* Colors - Secondary (Sage Teal) */
  --color-secondary: #457b7b;
  --color-secondary-light: #6a9e9e;
  --color-secondary-bg: #f0f6f6;

  /* Colors - Semantic */
  --color-success: #5a8a5a;
  --color-success-bg: #f0f5f0;

  --color-error: #c25454;
  --color-error-bg: #fdf2f2;

  --color-warning: #c9a227;
  --color-warning-bg: #fdfaf0;

  /* Colors - Neutral (Warm Grays) */
  --color-bg: #faf9f7;
  --color-bg-elevated: #ffffff;
  --color-text: #2d2a26;
  --color-text-muted: #6b6560;
  --color-text-subtle: #9a948d;
  --color-border: #e8e4df;
  --color-border-strong: #d4d0ca;

  /* Typography */
  --font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;          /* 12px */
  --font-size-sm: 0.875rem;         /* 14px */
  --font-size-base: 1rem;           /* 16px */
  --font-size-lg: 1.125rem;         /* 18px */
  --font-size-xl: 1.25rem;          /* 20px */
  --font-size-2xl: 1.5rem;          /* 24px */
  --font-size-3xl: 1.875rem;        /* 30px */

  /* Spacing */
  --space-1: 0.25rem;               /* 4px */
  --space-2: 0.5rem;                /* 8px */
  --space-3: 0.75rem;               /* 12px */
  --space-4: 1rem;                  /* 16px */
  --space-6: 1.5rem;                /* 24px */
  --space-8: 2rem;                  /* 32px */

  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --header-height: 4rem;
  --sidebar-width: 280px;
  --max-content-width: 1200px;
  --chat-max-width: 800px;

  /* Mobile safe areas */
  --safe-area-top: env(safe-area-inset-top, 0px);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-left: env(safe-area-inset-left, 0px);
  --safe-area-right: env(safe-area-inset-right, 0px);
}


/* =============================================================================
   2. BASE STYLES
   ============================================================================= */

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ensure full height for app container */
html, body, #app {
  height: 100%;
}

/* Touch-friendly defaults */
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Minimum touch target size (44x44px) */
button,
[role="button"],
input[type="submit"],
input[type="button"] {
  min-height: 44px;
  min-width: 44px;
}


/* =============================================================================
   3. COMPONENT STYLES
   ============================================================================= */

/* --- Thought Bubble (Persona's inner thoughts) --- */
.thought-bubble {
  background: var(--color-primary-bg);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  font-style: italic;
  color: var(--color-text);
}

/* --- Advice Bubble (SE coaching tips) --- */
.advice-bubble {
  background: var(--color-secondary-bg);
  border-left: 3px solid var(--color-secondary);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

/* --- Chat Message --- */
.chat-message {
  animation: fadeIn var(--transition-slow) ease-out;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  max-width: 85%;
  margin-bottom: var(--space-3);
}

.chat-message--user {
  background: var(--color-primary);
  color: white;
  margin-left: auto;
  border-bottom-right-radius: var(--radius-sm);
}

.chat-message--assistant {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  margin-right: auto;
  border-bottom-left-radius: var(--radius-sm);
}

/* --- Typing Indicator --- */
.typing-indicator {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--color-text-subtle);
  border-radius: var(--radius-full);
  animation: blink 1.4s infinite both;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

/* --- Model Badge --- */
.model-badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background: var(--color-border);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

/* --- Progress Bar --- */
.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

/* --- Score Card (for exercises) --- */
.score-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.score-card--pass {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.score-card--fail {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

/* --- Button Variants --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-light);
}

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

.btn--secondary:hover:not(:disabled) {
  background: var(--color-border);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
}

.btn--ghost:hover:not(:disabled) {
  background: var(--color-border);
  color: var(--color-text);
}

/* --- Card --- */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card--clickable {
  cursor: pointer;
}

/* --- Input --- */
.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  transition: border-color var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}


/* =============================================================================
   3b. SEMANTIC LAYOUT CLASSES
   ============================================================================= */

/* --- Screen Containers --- */
.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}

.screen-header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  position: sticky;
  top: 0;
  z-index: 10;
}

.screen-content {
  flex: 1;
  padding: var(--space-4);
  overflow-y: auto;
}

@media (min-width: 768px) {
  .screen-content {
    padding: var(--space-8);
  }
}

.screen-content--narrow {
  max-width: 800px;
  margin: 0 auto;
}

.screen-footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: var(--space-4);
}

/* --- Card Variants --- */
.card--highlight {
  background: var(--color-primary-bg);
  border-color: var(--color-primary);
}

.card--secondary {
  background: var(--color-secondary-bg);
  border-color: var(--color-secondary);
}

/* --- App Header --- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  min-height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header__left,
.app-header__right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 48px;
}

.app-header__center {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.app-header__title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.app-header__logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
}

.app-header__btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--color-text);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.app-header__btn:hover {
  background: var(--color-bg);
}

/* --- Hamburger Menu --- */
.hamburger-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--color-text);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.hamburger-btn:hover {
  background: var(--color-bg);
}

.hamburger-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.hamburger-overlay--visible {
  opacity: 1;
  visibility: visible;
}

.hamburger-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  max-width: 85vw;
  background: var(--color-bg-elevated);
  z-index: 210;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.hamburger-drawer--open {
  transform: translateX(0);
}

.hamburger-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.hamburger-drawer__header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.hamburger-drawer__close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.5rem;
}

.hamburger-drawer__menu {
  list-style: none;
  margin: 0;
  padding: var(--space-2) 0;
  flex: 1;
  overflow-y: auto;
}

.hamburger-drawer__item {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.hamburger-drawer__item:hover {
  background: var(--color-bg);
}

.hamburger-drawer__item--active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.hamburger-drawer__divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-2) var(--space-4);
}

.hamburger-drawer__item--lang {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hamburger-drawer__item--lang svg {
  margin-right: var(--space-3);
  vertical-align: middle;
}

.hamburger-drawer__lang-select {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  cursor: pointer;
}

.hamburger-drawer__item--danger {
  color: var(--color-error);
}

.hamburger-drawer__item--danger:hover {
  background: rgba(194, 84, 84, 0.1);
}

/* --- Learning Path (Brilliant-style) --- */
.learning-path {
  display: flex;
  align-items: center;
  padding: var(--space-4) 0;
  overflow-x: auto;
  gap: 0;
}

.learning-path::-webkit-scrollbar {
  display: none;
}

.path-node {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.path-node__circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  background: var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.path-node__circle:hover {
  transform: scale(1.1);
}

.path-node__line {
  width: 24px;
  height: 3px;
  background: var(--color-border);
}

.path-node--complete .path-node__circle {
  background: var(--color-primary);
  color: white;
}

.path-node--complete .path-node__line {
  background: var(--color-primary);
}

.path-node--active .path-node__circle {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  animation: pulse-ring 2s infinite;
}

.path-node--locked .path-node__circle {
  background: var(--color-bg);
  color: var(--color-text-subtle);
  cursor: not-allowed;
}

.path-node--locked .path-node__circle:hover {
  transform: none;
}

@keyframes pulse-ring {
  0%, 100% {
    box-shadow: 0 0 0 0 var(--color-primary-bg);
  }
  50% {
    box-shadow: 0 0 0 8px transparent;
  }
}

/* --- Module List (vertical layout) --- */
.module-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.module-item {
  display: flex;
  align-items: stretch;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  min-height: 60px;
}

.module-item--active,
.module-item--complete {
  cursor: pointer;
}

.module-item--active:hover .module-item__content,
.module-item--complete:hover .module-item__content {
  background: var(--color-bg);
}

.module-item__indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 36px;
  flex-shrink: 0;
}

.module-item__circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
  background: var(--color-border);
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.module-item__line {
  width: 2px;
  flex: 1;
  min-height: 20px;
  background: var(--color-border);
  margin-top: var(--space-2);
}

.module-item--complete .module-item__circle {
  background: var(--color-primary);
  color: white;
}

.module-item--complete .module-item__line {
  background: var(--color-primary);
}

.module-item--active .module-item__circle {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 0 0 4px var(--color-primary-bg);
}

.module-item--locked .module-item__circle {
  background: var(--color-bg);
  color: var(--color-text-subtle);
}

.module-item__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.module-item--active .module-item__content {
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary);
}

.module-item__title {
  font-weight: 500;
  color: var(--color-text);
  font-size: var(--font-size-base);
  line-height: 1.3;
}

.module-item--locked .module-item__title {
  color: var(--color-text-muted);
}

.module-item--active .module-item__title {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.module-item__duration {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.module-item__arrow {
  display: flex;
  align-items: center;
  color: var(--color-primary);
  padding-right: var(--space-2);
}

/* --- Module Lesson Progress Indicator --- */
.module-item__lesson-progress {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.module-item__lesson-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  min-width: 2rem;
}

.module-item__lesson-dots {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.module-item__lesson-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background var(--transition-fast);
}

.module-item__lesson-dot--complete {
  background: var(--color-success);
}

/* --- Lesson List --- */
.lesson-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding-left: var(--space-2);
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lesson-item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.lesson-item__check {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.lesson-item--complete .lesson-item__check {
  background: var(--color-success);
  color: white;
}

.lesson-item__number {
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.lesson-item__title {
  flex: 1;
  font-weight: 500;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.lesson-item__arrow {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.lesson-item:hover .lesson-item__arrow {
  color: var(--color-primary);
}

.lesson-item__score {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light, rgba(59, 130, 246, 0.1));
  padding: 2px 8px;
  border-radius: 12px;
  margin-left: auto;
  margin-right: var(--space-2);
  flex-shrink: 0;
}

.lesson-item__status {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.lesson-item--complete .lesson-item__status {
  background: var(--color-success);
  color: white;
}

.lesson-item--active .lesson-item__status {
  background: var(--color-primary);
  color: white;
}

.lesson-item--locked .lesson-item__status {
  background: var(--color-border);
  color: var(--color-text-subtle);
}

.lesson-item__content {
  flex: 1;
  min-width: 0;
}

.lesson-item--locked .lesson-item__title {
  color: var(--color-text-muted);
}

.lesson-item__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* --- User Avatar --- */
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.user-avatar--placeholder {
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}


/* =============================================================================
   4. LAYOUT UTILITIES
   ============================================================================= */

/* --- Custom Scrollbars --- */
.scroll-area {
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}

.scroll-area::-webkit-scrollbar {
  width: 8px;
}

.scroll-area::-webkit-scrollbar-track {
  background: transparent;
}

.scroll-area::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
}

.scroll-area::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-subtle);
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* --- Flex utilities --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

/* --- Visibility --- */
.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}


/* =============================================================================
   5. SCREEN-SPECIFIC STYLES
   ============================================================================= */

/* --- Chat Screen Layout --- */
.chat-layout {
  display: grid;
  grid-template-columns: 1fr;
  height: 100%;
  overflow: hidden;
}

/* Desktop: 3-column layout */
@media (min-width: 1024px) {
  .chat-layout {
    grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
  }
}

.chat-layout__sidebar {
  background: var(--color-bg-elevated);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4);
  overflow-y: auto;
}

.chat-layout__sidebar--right {
  border-right: none;
  border-left: 1px solid var(--color-border);
}

.chat-layout__main {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* --- Mobile Bottom Sheet --- */
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-elevated);
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: translateY(100%);
  transition: transform var(--transition-slow);
  max-height: 70vh;
  z-index: 100;
  padding-bottom: var(--safe-area-bottom);
}

.bottom-sheet--open {
  transform: translateY(0);
}

.bottom-sheet__handle {
  width: 40px;
  height: 4px;
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
  margin: var(--space-3) auto;
}

.bottom-sheet__content {
  padding: var(--space-4);
  overflow-y: auto;
  max-height: calc(70vh - 40px);
}

/* --- Mobile Navigation Tabs --- */
.mobile-tabs {
  display: flex;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  padding-bottom: var(--safe-area-bottom);
}

.mobile-tabs__tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3);
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-xs);
}

.mobile-tabs__tab--active {
  color: var(--color-primary);
}

/* Hide mobile elements on desktop */
@media (min-width: 1024px) {
  .mobile-only,
  .desktop-only-hidden {
    display: none !important;
  }
}

/* Hide desktop elements on mobile */
@media (max-width: 1023px) {
  .desktop-only,
  .mobile-only-hidden {
    display: none !important;
  }
}

/* --- Course/Lesson Screens --- */
.lesson-content {
  max-width: var(--chat-max-width);
  margin: 0 auto;
  padding: var(--space-6);
}

.lesson-content h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-4);
}

.lesson-content h2 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.lesson-content p {
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.lesson-content ul {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.lesson-content li {
  margin-bottom: var(--space-2);
}

/* --- Mini-Dialogue Display --- */
.mini-dialogue {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.mini-dialogue__setup {
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.mini-dialogue__turn {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
}

.mini-dialogue__turn--poor {
  background: var(--color-error-bg);
  border-left: 3px solid var(--color-error);
}

.mini-dialogue__turn--fair {
  background: var(--color-warning-bg);
  border-left: 3px solid var(--color-warning);
}

.mini-dialogue__turn--better {
  background: var(--color-success-bg);
  border-left: 3px solid var(--color-success);
}

/* --- Course Exercise Screen --- */
.exercise-screen {
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height for mobile browsers */
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow: hidden; /* Prevent body scroll, let conversation area scroll */
}

.exercise-header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  padding-top: max(var(--space-3), var(--safe-area-top));
}

.exercise-header__inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.exercise-header__title {
  font-weight: 600;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.exercise-header__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Exercise Progress Bar */
.exercise-progress {
  max-width: 800px;
  margin: var(--space-3) auto 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.exercise-progress__bar {
  flex: 1;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.exercise-progress__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.exercise-progress__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  min-width: 3rem;
  text-align: right;
}

/* Focus Skills Banner */
.skills-banner {
  background: var(--color-primary-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-4);
}

.skills-banner__inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}

.skills-banner__label {
  color: var(--color-primary-dark);
  font-weight: 500;
}

.skills-banner__tag {
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary-light);
  background: rgba(184, 99, 66, 0.2);
  color: var(--color-primary-dark);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

/* Conversation Area */
.conversation-area {
  flex: 1;
  min-height: 0; /* Allow shrinking in flexbox */
  overflow-y: auto;
  padding: var(--space-4);
}

.conversation-area__inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.conversation-empty {
  text-align: center;
  padding: var(--space-8) 0;
  color: var(--color-text-muted);
}

.conversation-empty__title {
  margin-bottom: var(--space-2);
}

.conversation-empty__scenario {
  font-size: var(--font-size-sm);
}

/* Chat Input Area */
.chat-input-area {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  padding-bottom: max(var(--space-4), var(--safe-area-bottom));
}

.chat-input-area__inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  gap: var(--space-3);
}

.chat-input-area__input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  font-size: var(--font-size-base);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input-area__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.chat-input-area__input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-input-area__btn {
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast);
  min-width: 44px;
}

.chat-input-area__btn:hover:not(:disabled) {
  background: var(--color-primary-light);
}

.chat-input-area__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (min-width: 640px) {
  .chat-input-area__btn {
    padding: var(--space-3) var(--space-6);
  }
}

/* Max Messages Banner */
.max-messages-banner {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  text-align: center;
}

.max-messages-banner__text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

/* Complete Banner */
.complete-banner {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-success-bg);
  text-align: center;
}

.complete-banner__title {
  color: var(--color-success);
  font-weight: 500;
}

.complete-banner__subtitle {
  color: var(--color-success);
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* --- Course Module Screen --- */
.module-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  padding-bottom: var(--safe-area-bottom);
}

.module-header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  position: sticky;
  top: 0;
  z-index: 10;
}

.module-header__inner {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.module-header__title {
  font-weight: 600;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.module-header__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.module-header__progress {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
}

.module-progress-bar {
  max-width: 800px;
  margin: var(--space-2) auto 0;
}

.module-progress-bar__track {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.module-progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.module-content {
  flex: 1;
  overflow-y: auto;
}

.module-content__inner {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-4);
  padding-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .module-content__inner {
    padding: var(--space-8);
  }
}

/* Lesson Section Title */
.lesson-section-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

/* Lesson Title */
.lesson-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .lesson-title {
    font-size: var(--font-size-3xl);
  }
}

/* Lesson Introduction */
.lesson-intro {
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.lesson-intro p {
  margin-bottom: var(--space-4);
}

/* Lesson Image */
.lesson-image {
  margin: var(--space-6) 0;
}

.lesson-image__img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.lesson-image__caption {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
  font-style: italic;
}

/* Lesson Activities Container */
.lesson-activities {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* Lesson Navigation - part of content flow */
.lesson-navigation {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.lesson-navigation__btn {
  flex: 1;
  min-height: 48px;
}

/* Key Points Box */
.key-points-box {
  background: var(--color-primary-bg);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: var(--space-8) 0;
}

@media (min-width: 768px) {
  .key-points-box {
    padding: var(--space-6);
  }
}

.key-points-box__title {
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}

.key-points-box__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.key-points-box__item {
  display: flex;
  gap: var(--space-2);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.key-points-box__bullet {
  color: var(--color-primary);
  margin-top: 2px;
}

/* Examples Section */
.examples-section {
  margin: var(--space-8) 0;
}

.examples-section__title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.example-item {
  background: var(--color-bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

.example-item__text {
  color: var(--color-text);
  font-style: italic;
}

/* Summary Box */
.summary-box {
  background: var(--color-bg);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-top: var(--space-8);
}

@media (min-width: 768px) {
  .summary-box {
    padding: var(--space-6);
  }
}

.summary-box__title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.summary-box__text {
  color: var(--color-text-muted);
}

/* Dialogue Box */
.dialogue-box {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-8) 0;
}

.dialogue-box__setup {
  background: var(--color-bg);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.dialogue-box__turns {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.dialogue-turn {
  display: flex;
  gap: var(--space-3);
}

.dialogue-turn__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.dialogue-turn__avatar--poor { background: var(--color-error); }
.dialogue-turn__avatar--fair { background: var(--color-warning); }
.dialogue-turn__avatar--better { background: var(--color-success); }
.dialogue-turn__avatar--neutral { background: var(--color-text-muted); }

.dialogue-turn__content {
  flex: 1;
}

.dialogue-turn__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.dialogue-turn__speaker {
  font-weight: 500;
  color: var(--color-text);
}

.dialogue-turn__quality {
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.dialogue-turn__quality--poor { background: var(--color-error-bg); color: var(--color-error); }
.dialogue-turn__quality--fair { background: var(--color-warning-bg); color: var(--color-warning); }
.dialogue-turn__quality--better { background: var(--color-success-bg); color: var(--color-success); }

.dialogue-turn__text {
  color: var(--color-text);
}

.dialogue-turn__reasoning {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-2);
}

/* Screen-based Lesson Styles */
.lesson-screen {
  animation: fadeIn 0.3s ease-out;
}

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

/* Screen Progress Indicator */
.screen-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.screen-progress__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.screen-progress__dots {
  display: flex;
  gap: var(--space-1);
}

.screen-progress__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: all 0.2s ease;
}

.screen-progress__dot--active {
  background: var(--color-primary);
  transform: scale(1.2);
}

.screen-progress__dot--complete {
  background: var(--color-primary);
  opacity: 0.5;
}

/* Hook Screen */
.screen-hook {
  padding: var(--space-6) 0;
}

.screen-hook__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.screen-hook__content {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.7;
}

.screen-hook__content p {
  margin-bottom: var(--space-4);
}

.screen-hook__content em {
  font-style: italic;
}

.screen-hook__content strong {
  font-weight: 600;
}

/* Text Screen */
.screen-text__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.screen-text__content {
  color: var(--color-text);
  line-height: 1.7;
}

.screen-text__content p {
  margin-bottom: var(--space-4);
}

.screen-text__content strong {
  font-weight: 600;
}

.screen-text__content em {
  font-style: italic;
}

/* Lesson Tables */
.lesson-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

.lesson-table th,
.lesson-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.lesson-table th {
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg);
}

.lesson-table td {
  color: var(--color-text);
}

.lesson-table tbody tr:hover {
  background: var(--color-bg);
}

.lesson-table td:first-child {
  color: var(--color-text-muted);
}

.lesson-table td:last-child {
  color: var(--color-primary);
  font-weight: 500;
}

/* Lesson Lists (bullet points) */
.lesson-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4) 0;
}

.lesson-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-text);
  line-height: 1.6;
}

.lesson-list li::before {
  content: "•";
  position: absolute;
  left: var(--space-2);
  color: var(--color-primary);
  font-weight: bold;
}

.lesson-list-header {
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

.lesson-list-header:first-child {
  margin-top: 0;
}

/* Example Screen */
.screen-example__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.screen-example__intro {
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.screen-example__intro p {
  margin-bottom: var(--space-4);
}

.example-dialogues {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.dialogue-example {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.dialogue-example--poor {
  border-left: 4px solid var(--color-error);
}

.dialogue-example--fair {
  border-left: 4px solid var(--color-warning);
}

.dialogue-example--better,
.dialogue-example--best {
  border-left: 4px solid var(--color-success);
}

.dialogue-example__header {
  margin-bottom: var(--space-2);
}

.dialogue-example__quality {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dialogue-example--poor .dialogue-example__quality { color: var(--color-error); }
.dialogue-example--fair .dialogue-example__quality { color: var(--color-warning); }
.dialogue-example--better .dialogue-example__quality,
.dialogue-example--best .dialogue-example__quality { color: var(--color-success); }

.dialogue-example__response {
  font-size: var(--font-size-base);
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-2);
}

.dialogue-example__content {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.6;
}

.dialogue-example__content p {
  margin-bottom: var(--space-2);
}

.dialogue-example__content p:last-child {
  margin-bottom: 0;
}

.dialogue-example--neutral {
  border-left: 4px solid var(--color-border);
  background: var(--color-bg);
}

.dialogue-example__reasoning {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Key Points Screen */
.screen-key-points__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

/* Activity Screen */
.screen-activity__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

/* Summary Screen */
.screen-summary__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.screen-summary .summary-box {
  background: var(--color-primary-bg);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-6);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.screen-summary .summary-box__content {
  color: var(--color-text);
  line-height: 1.7;
}

.screen-summary .summary-box__content p {
  margin-bottom: var(--space-4);
}

.screen-summary .summary-box__content p:last-child {
  margin-bottom: 0;
}

/* Exercise Intro */
.exercise-intro {
  text-align: center;
  padding: var(--space-8) 0;
}

.exercise-intro__icon {
  width: 80px;
  height: 80px;
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-size: 2.5rem;
}

.exercise-intro__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.exercise-intro__objective {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.exercise-intro__instructions {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: left;
  margin-bottom: var(--space-6);
}

.exercise-intro__instructions-title {
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.exercise-intro__instructions-text {
  color: var(--color-text-muted);
  white-space: pre-line;
}

.skills-to-practice {
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: left;
}

.skills-to-practice__title {
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}

.skills-to-practice__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skills-to-practice__tag {
  padding: var(--space-1) var(--space-3);
  background: rgba(184, 99, 66, 0.2);
  color: var(--color-primary-dark);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
}

.mini-dialogue__reasoning {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}


/* =============================================================================
   6. RESPONSIVE OVERRIDES
   ============================================================================= */

/* Mobile-first adjustments */
@media (max-width: 639px) {
  :root {
    --font-size-base: 1rem;
    --space-4: 0.875rem;
  }

  .lesson-content {
    padding: var(--space-4);
  }

  .lesson-content h1 {
    font-size: var(--font-size-xl);
  }

  /* Stack buttons on mobile */
  .btn-stack-mobile {
    flex-direction: column;
    width: 100%;
  }

  .btn-stack-mobile > * {
    width: 100%;
  }
}

/* Tablet adjustments */
@media (min-width: 640px) and (max-width: 1023px) {
  .chat-layout {
    grid-template-columns: 1fr;
  }
}

/* Large desktop */
@media (min-width: 1280px) {
  :root {
    --sidebar-width: 320px;
  }
}

/* =============================================================================
   6b. MOBILE-SPECIFIC ENHANCEMENTS
   ============================================================================= */

/* Touch-friendly minimum sizes */
.touch-target {
  min-height: 44px;
  min-width: 44px;
}

/* Larger touch targets for important actions */
.touch-target-lg {
  min-height: 52px;
  min-width: 52px;
}

/* Safe area padding utilities */
.pt-safe { padding-top: var(--safe-area-top); }
.pb-safe { padding-bottom: var(--safe-area-bottom); }
.pl-safe { padding-left: var(--safe-area-left); }
.pr-safe { padding-right: var(--safe-area-right); }
.px-safe {
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}
.py-safe {
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
}
.p-safe {
  padding-top: var(--safe-area-top);
  padding-bottom: var(--safe-area-bottom);
  padding-left: var(--safe-area-left);
  padding-right: var(--safe-area-right);
}

/* Mobile sticky header */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  padding-top: calc(var(--space-3) + var(--safe-area-top));
}

/* Mobile sticky footer (for input areas) */
.mobile-footer {
  position: sticky;
  bottom: 0;
  z-index: 50;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-4);
  padding-bottom: calc(var(--space-3) + var(--safe-area-bottom));
}

/* Mobile bottom navigation bar */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding-bottom: var(--safe-area-bottom);
}

.mobile-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--space-2) var(--space-1);
  min-height: 56px;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
  font-size: var(--font-size-xs);
}

.mobile-nav__item:active {
  background: var(--color-border);
}

.mobile-nav__item--active {
  color: var(--color-primary);
}

.mobile-nav__icon {
  width: 24px;
  height: 24px;
}

/* Account for bottom nav when present */
.has-mobile-nav {
  padding-bottom: calc(56px + var(--safe-area-bottom));
}

/* Mobile card with better touch feedback */
.mobile-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.mobile-card:active {
  transform: scale(0.98);
  box-shadow: var(--shadow-sm);
}

/* Swipeable panel (for bottom sheets) */
.swipe-panel {
  touch-action: pan-y;
}

/* Full-screen mobile overlay */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-overlay--visible {
  opacity: 1;
  visibility: visible;
}

/* Pull-to-refresh indicator */
.pull-indicator {
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Mobile-friendly form inputs */
@media (max-width: 639px) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="search"],
  textarea,
  select {
    font-size: 16px; /* Prevents iOS zoom on focus */
    min-height: 48px;
    padding: var(--space-3) var(--space-4);
  }

  /* Larger checkboxes/radios on mobile */
  input[type="checkbox"],
  input[type="radio"] {
    width: 20px;
    height: 20px;
  }
}

/* Floating action button */
.fab {
  position: fixed;
  bottom: calc(var(--space-4) + var(--safe-area-bottom));
  right: var(--space-4);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  border: none;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 80;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.fab:active {
  transform: scale(0.95);
  box-shadow: var(--shadow-md);
}

/* When mobile nav is present, move FAB up */
.has-mobile-nav .fab {
  bottom: calc(56px + var(--space-4) + var(--safe-area-bottom));
}

/* Horizontal scroll container for mobile */
.mobile-scroll-x {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-2) 0;
  margin: 0 calc(-1 * var(--space-4));
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.mobile-scroll-x::-webkit-scrollbar {
  display: none;
}

.mobile-scroll-x > * {
  scroll-snap-align: start;
  flex-shrink: 0;
}

/* Mobile skeleton loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-border) 25%,
    var(--color-border-strong) 50%,
    var(--color-border) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

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


/* =============================================================================
   6d. SPLASH SCREEN
   ============================================================================= */

.splash-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-primary-bg) 100%);
  padding: var(--space-4);
}

.splash-content {
  text-align: center;
  animation: splashFadeIn 0.8s ease-out;
}

.splash-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-6);
  color: var(--color-primary);
  animation: splashIconPulse 2s ease-in-out infinite;
}

.splash-icon svg {
  width: 100%;
  height: 100%;
}

.splash-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-2);
  letter-spacing: -0.02em;
}

@media (min-width: 640px) {
  .splash-title {
    font-size: 3rem;
  }
}

.splash-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-8);
  font-style: italic;
}

.splash-loader {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}

.splash-loader__dot {
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: splashDotBounce 1.4s ease-in-out infinite;
}

.splash-loader__dot:nth-child(2) {
  animation-delay: 0.2s;
}

.splash-loader__dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes splashFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes splashIconPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.9;
  }
}

@keyframes splashDotBounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  40% {
    transform: translateY(-8px);
    opacity: 1;
  }
}


/* =============================================================================
   7. ANIMATIONS
   ============================================================================= */

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

@keyframes blink {
  0%, 100% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Utility animation classes */
.animate-fadeIn {
  animation: fadeIn var(--transition-slow) ease-out;
}

.animate-slideUp {
  animation: slideUp var(--transition-slow) ease-out;
}

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


/* =============================================================================
   8. COLOR OVERRIDE UTILITIES
   ============================================================================= */

/* Override Tailwind amber classes with design system primary colors */
.bg-amber-500, .bg-amber-400 { background-color: var(--color-primary) !important; }
.bg-amber-600 { background-color: var(--color-primary-dark) !important; }
.bg-amber-50 { background-color: var(--color-primary-bg) !important; }
.bg-amber-100 { background-color: var(--color-primary-bg) !important; }

.text-amber-500, .text-amber-600, .text-amber-700, .text-amber-800, .text-amber-900 {
  color: var(--color-primary-dark) !important;
}

.border-amber-500 { border-color: var(--color-primary) !important; }
.border-amber-200, .border-amber-100 { border-color: var(--color-border) !important; }

.ring-amber-500, .ring-amber-200 { --tw-ring-color: var(--color-primary) !important; }
.focus\:ring-amber-500:focus { --tw-ring-color: var(--color-primary) !important; }
.focus\:border-amber-500:focus { border-color: var(--color-primary) !important; }

.hover\:bg-amber-50:hover { background-color: var(--color-primary-bg) !important; }
.hover\:bg-amber-600:hover { background-color: var(--color-primary-dark) !important; }

/* Override Tailwind stone classes with design system neutral colors */
.bg-stone-50 { background-color: var(--color-bg) !important; }
.bg-stone-100 { background-color: var(--color-bg) !important; }
.bg-stone-200 { background-color: var(--color-border) !important; }

.text-stone-500, .text-stone-600 { color: var(--color-text-muted) !important; }
.text-stone-700 { color: var(--color-text) !important; }
.text-stone-800 { color: var(--color-text) !important; }

.border-stone-200, .border-stone-300 { border-color: var(--color-border) !important; }

.hover\:bg-stone-50:hover { background-color: var(--color-bg) !important; }
.hover\:bg-stone-100:hover { background-color: var(--color-border) !important; }

/* Gradient overrides */
.from-amber-500 { --tw-gradient-from: var(--color-primary) !important; }
.to-amber-600 { --tw-gradient-to: var(--color-primary-dark) !important; }
.from-amber-500.to-amber-600 {
  background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark)) !important;
}

/* Fix for specific gradient classes */
.bg-gradient-to-r.from-amber-500.to-amber-600 {
  background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark)) !important;
}

.bg-gradient-to-r.from-amber-500.to-orange-500 {
  background: linear-gradient(to right, var(--color-primary), var(--color-warning)) !important;
}


/* =============================================================================
   9. ACTIVITY COMPONENTS (Brilliant-style)
   ============================================================================= */

.activity {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-6) 0;
}

.activity__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.activity__icon {
  font-size: 1.5rem;
}

.activity__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.activity__instruction {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.activity__content {
  margin-bottom: var(--space-4);
}

.activity__question,
.activity__prompt {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

/* Quiz Options */
.activity__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.activity__option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.activity__option:hover:not(:has(input:disabled)) {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.activity__option--selected {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.activity__option--correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.activity__option--incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.activity__option--missed {
  border-color: var(--color-success);
  border-style: dashed;
}

.activity__option input {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
}

.activity__option-text {
  flex: 1;
  color: var(--color-text);
}

.activity__option-icon {
  font-weight: bold;
  font-size: var(--font-size-lg);
}

/* Feedback */
.activity__feedback {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.activity__feedback--correct {
  background: var(--color-success-bg);
  border-left: 4px solid var(--color-success);
}

.activity__feedback--incorrect {
  background: var(--color-error-bg);
  border-left: 4px solid var(--color-error);
}

.activity__feedback--neutral {
  background: var(--color-secondary-bg);
  border-left: 4px solid var(--color-secondary);
}

.activity__feedback-text {
  font-weight: 500;
  color: var(--color-text);
  margin: 0;
}

.activity__feedback-explanation {
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
}

/* Actions */
.activity__actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Reflection */
.activity__textarea {
  width: 100%;
  min-height: 120px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  font-family: inherit;
  font-size: var(--font-size-base);
  resize: vertical;
  margin-bottom: var(--space-4);
}

.activity__textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.activity__hints {
  background: var(--color-bg);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.activity__hints-label {
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
}

.activity__hints-list {
  margin: 0;
  padding-left: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* Ordering */
.activity__order-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.activity__order-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: grab;
  transition: all var(--transition-fast);
}

.activity__order-item:active {
  cursor: grabbing;
}

.activity__order-item--correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.activity__order-item--incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.activity__order-handle {
  color: var(--color-text-muted);
  cursor: grab;
}

.activity__order-number {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.activity__order-text {
  flex: 1;
  color: var(--color-text);
}

/* Scenario Choice */
.activity__scenario-box {
  background: var(--color-bg);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-secondary);
  margin-bottom: var(--space-4);
}

.activity__scenario-text {
  color: var(--color-text);
  font-style: italic;
  margin: 0;
}

.activity__scenario-prompt {
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

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

.activity__scenario-option {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.activity__scenario-option[data-selectable="true"]:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.activity__scenario-option--selected {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
}

.activity__scenario-option--best {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.activity__scenario-option--poor {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.activity__scenario-option--missed-best {
  border-color: var(--color-success);
  border-style: dashed;
}

.activity__scenario-option-text {
  color: var(--color-text);
}

.activity__scenario-option-feedback {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.activity__badge {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-left: var(--space-2);
}

.activity__badge--best {
  background: var(--color-success);
  color: white;
}

/* Matching */
.activity__match-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

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

.activity__match-item {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.activity__match-item:hover {
  border-color: var(--color-primary);
}

.activity__match-item--selected {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.activity__match-item--matched {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  cursor: default;
}

/* Fill in the Blank */
.activity__fill-text {
  line-height: 2;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.activity__blank-input {
  display: inline-block;
  width: 120px;
  padding: var(--space-1) var(--space-2);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-family: inherit;
  font-size: inherit;
  text-align: center;
  margin: 0 var(--space-1);
}

.activity__blank-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.activity__blank-input--correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.activity__blank-input--incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

.activity__corrections {
  margin-top: var(--space-2);
  padding-left: var(--space-4);
  font-size: var(--font-size-sm);
}


/* =============================================================================
   10. EVALUATION SCREEN
   ============================================================================= */

.evaluation-screen {
  min-height: 100vh;
  background: var(--color-bg);
  padding: var(--space-4);
  padding-bottom: calc(var(--space-8) + var(--safe-area-bottom));
}

@media (min-width: 768px) {
  .evaluation-screen {
    padding: var(--space-8);
  }
}

.evaluation-screen__inner {
  max-width: 700px;
  margin: 0 auto;
}

/* Header */
.evaluation-header {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.evaluation-header__icon {
  font-size: 3rem;
  margin-bottom: var(--space-3);
}

.evaluation-header__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-2);
}

.evaluation-header__subtitle {
  color: var(--color-text-muted);
  margin: 0;
}

/* Score Display */
.evaluation-score {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.evaluation-score__value {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.evaluation-score__label {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
}

/* Card */
.evaluation-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.evaluation-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 var(--space-4);
}

/* Criteria Scores */
.evaluation-criteria {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.evaluation-criteria__item {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.evaluation-criteria__item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.evaluation-criteria__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.evaluation-criteria__name {
  font-weight: 500;
  color: var(--color-text);
}

.evaluation-criteria__score {
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.evaluation-criteria__track {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.evaluation-criteria__bar {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}

.evaluation-criteria__bar--good {
  background: var(--color-success);
}

.evaluation-criteria__bar--fair {
  background: var(--color-warning);
}

.evaluation-criteria__bar--needs-work {
  background: var(--color-error);
}

.evaluation-criteria__feedback {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Feedback Sections */
.evaluation-feedback {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.evaluation-section {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
}

.evaluation-section--success {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success);
}

.evaluation-section--warning {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning);
}

.evaluation-section--info {
  background: var(--color-secondary-bg);
  border: 1px solid var(--color-secondary);
}

.evaluation-section__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.evaluation-section__content {
  flex: 1;
}

.evaluation-section__title {
  font-weight: 600;
  margin: 0 0 var(--space-2);
}

.evaluation-section--success .evaluation-section__title {
  color: var(--color-success);
}

.evaluation-section--warning .evaluation-section__title {
  color: var(--color-warning);
}

.evaluation-section--info .evaluation-section__title {
  color: var(--color-secondary);
}

.evaluation-section__list {
  margin: 0;
  padding-left: var(--space-4);
}

.evaluation-section__list li {
  margin-bottom: var(--space-1);
  color: var(--color-text);
}

.evaluation-section__text {
  margin: 0;
  color: var(--color-text);
}

/* Conversation Review */
.evaluation-conversation {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.evaluation-conversation__summary {
  padding: var(--space-4) var(--space-6);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
}

.evaluation-conversation__summary:hover {
  color: var(--color-primary);
}

.evaluation-conversation__content {
  padding: 0 var(--space-6) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.evaluation-conversation__message {
  padding: var(--space-3);
  background: var(--color-bg);
  border-radius: var(--radius-md);
}

.evaluation-conversation__message--user {
  background: var(--color-primary-bg);
  margin-left: var(--space-6);
}

.evaluation-conversation__role {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: block;
  margin-bottom: var(--space-1);
}

.evaluation-conversation__text {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  white-space: pre-wrap;
}

.evaluation-conversation__empty {
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-4);
}

/* Action Buttons */
.evaluation-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (min-width: 480px) {
  .evaluation-actions {
    flex-direction: row;
  }
}

.evaluation-actions__btn {
  flex: 1;
  min-height: 52px;
}

/* Exercise Score Badge (for course list) */
.exercise-score-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 24px;
  padding: 0 var(--space-2);
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.exercise-score-badge--good {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.exercise-score-badge--fair {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.exercise-score-badge--needs-work {
  background: var(--color-error-bg);
  color: var(--color-error);
}