/* ==========================================================================
   Noam Learning Platform - Design System
   Color Scheme: Deep Teal + Copper
   ========================================================================== */

/* CSS Variables - Design System */
:root {
  /* Primary - Deep Teal */
  --color-primary: #115E59;
  --color-primary-dark: #134E4A;
  --color-primary-light: #F0FDFA;

  /* Accent - Copper */
  --color-accent: #B45309;
  --color-accent-dark: #92400E;
  --color-accent-light: #FEF3C7;

  /* Semantic */
  --color-success: #059669;
  --color-success-light: #D1FAE5;
  --color-error: #DC2626;
  --color-error-light: #FEE2E2;

  /* Neutrals - Stone */
  --color-text: #1C1917;
  --color-text-secondary: #57534E;
  --color-text-muted: #78716C;
  --color-placeholder: #A8A29E;
  --color-border: #D6D3D1;
  --color-border-light: #E7E5E4;
  --color-bg-subtle: #F5F5F4;
  --color-bg: #FAFAF9;
  --color-card: #FFFFFF;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: var(--color-card);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Clickable Logo Link */
.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin: calc(-1 * var(--space-1));
  transition: opacity var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.8;
}

/* Back to Courses Link */
.back-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  border-left: 1px solid var(--color-border-light);
  padding-left: var(--space-4);
}

.back-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.logo {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.brand {
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.progress-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.progress-bar {
  width: 120px;
  height: 6px;
  background: var(--color-border-light);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 3px;
  transition: width var(--transition-normal);
}

.progress-text {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-accent);
  min-width: 36px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.user-id {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.user-status {
  width: 10px;
  height: 10px;
  background: var(--color-success);
  border-radius: 50%;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */

.main {
  flex: 1;
  padding: calc(64px + var(--space-6)) var(--space-4) calc(80px + var(--space-6));
  display: flex;
  justify-content: center;
}

/* Increase bottom padding when textarea is shown */
body:has(.input-textarea) .main {
  padding-bottom: calc(152px + var(--space-6));
}

.content-card {
  width: 100%;
  max-width: 720px;
  background: var(--color-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.content-area {
  padding: var(--space-8);
  min-height: 400px;
  max-height: calc(100vh - 240px);
  overflow-y: auto;
}

/* ==========================================================================
   Content Rendering (Markdown)
   ========================================================================== */

.content-area h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.content-area h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.content-area h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.content-area p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

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

.content-area li {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.content-area code {
  background: var(--color-bg-subtle);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9em;
}

.content-area pre {
  background: var(--color-bg-subtle);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

.content-area pre code {
  background: none;
  padding: 0;
}

.content-area hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-6) 0;
}

/* ==========================================================================
   Content Blocks
   ========================================================================== */

.content-block {
  margin-bottom: var(--space-6);
  animation: fadeIn 0.3s ease;
}

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

/* Section Header */
.section-header {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

/* Welcome Screen */
.welcome-container {
  text-align: center;
  padding: var(--space-8) 0;
}

.welcome-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.welcome-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* ==========================================================================
   Cards (Course & Lesson)
   ========================================================================== */

.card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.card {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: var(--color-card);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.card.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.card.completed {
  border-color: var(--color-success);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-2);
}

/* Card with number badge */
.card-with-number {
  display: flex;
  gap: var(--space-4);
}

.card-number {
  width: 36px;
  height: 36px;
  min-width: 36px;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.card:hover .card-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.card.active .card-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.card-content {
  flex: 1;
}

.card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.card-badge {
  font-size: var(--font-size-xs);
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.card-badge.resume {
  background: var(--color-primary);
  color: white;
}

.card-badge.completed {
  background: var(--color-success-light);
  color: var(--color-success);
}

.card-badge.score {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.card-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.card-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.card-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--color-border-light);
  border-radius: 3px;
  overflow: hidden;
}

.card-progress-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 3px;
}

.card-progress-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  min-width: 80px;
}

/* Lesson Status Icons */
.status-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  margin-right: var(--space-2);
}

.status-icon.completed {
  background: var(--color-success);
  color: white;
}

.status-icon.in-progress {
  background: var(--color-primary);
  color: white;
}

.status-icon.not-started {
  background: var(--color-border-light);
  color: var(--color-text-muted);
}

/* ==========================================================================
   Exercise Block
   ========================================================================== */

.exercise-block {
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-6) 0;
}

.exercise-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-3);
}

.exercise-question {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.exercise-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Answer & Feedback
   ========================================================================== */

.answer-block {
  margin: var(--space-4) 0;
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-border);
}

.answer-label {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.answer-text {
  color: var(--color-text);
}

.feedback-block {
  margin: var(--space-4) 0;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.feedback-block.correct {
  background: var(--color-success-light);
  border-left: 3px solid var(--color-success);
}

.feedback-block.incorrect {
  background: var(--color-error-light);
  border-left: 3px solid var(--color-error);
}

.feedback-icon {
  font-size: var(--font-size-lg);
  line-height: 1;
}

.feedback-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Completion Screen
   ========================================================================== */

.completion-container {
  text-align: center;
  padding: var(--space-6) 0;
}

.completion-stars {
  font-size: 2rem;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.completion-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.completion-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.stats-container {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
}

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

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.stat-value.score {
  color: var(--color-accent);
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.topics-learned {
  text-align: left;
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
}

.topics-learned h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.topics-learned ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.topics-learned li {
  padding: var(--space-2) 0;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
}

.topics-learned li:last-child {
  border-bottom: none;
}

.results-list {
  text-align: left;
  margin-top: var(--space-6);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.result-item:last-child {
  border-bottom: none;
}

.result-name {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.result-points {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.result-points.correct {
  color: var(--color-success);
}

.result-points.incorrect {
  color: var(--color-error);
}

/* ==========================================================================
   Input Bar
   ========================================================================== */

.input-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-card);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-4) var(--space-6);
  z-index: 100;
}

.input-container {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  gap: var(--space-3);
}

/* Wider container when textarea is present */
.input-container:has(.input-textarea) {
  max-width: 850px;
}

.input-field {
  flex: 1;
  height: 48px;
  padding: 0 var(--space-4);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-field::placeholder {
  color: var(--color-placeholder);
}

.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(17, 94, 89, 0.1);
}

.input-field:disabled {
  background: var(--color-bg-subtle);
  cursor: not-allowed;
}

/* Textarea variant for longer answers */
.input-textarea {
  resize: none;
  height: 120px;
  width: 700px;
  padding: var(--space-4);
  line-height: 1.5;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  overflow-y: auto;
}

.action-button {
  height: 48px;
  min-width: 120px;
  padding: 0 var(--space-5);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: white;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: background-color var(--transition-fast);
}

.action-button:hover {
  background: var(--color-primary-dark);
}

.action-button:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

.action-button.success {
  background: var(--color-success);
}

/* Spinner */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   Error Toast
   ========================================================================== */

.error-toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-error);
  color: white;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.error-icon {
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.error-message {
  font-size: var(--font-size-sm);
}

.error-close {
  background: none;
  border: none;
  color: white;
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: 0;
  line-height: 1;
  opacity: 0.7;
}

.error-close:hover {
  opacity: 1;
}

/* Info Toast (for navigation feedback) */
.info-toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-card);
  color: var(--color-text);
  padding: var(--space-6) var(--space-8);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--color-border-light);
  z-index: 300;
  animation: fadeInScale 0.2s ease;
  text-align: center;
}

@keyframes fadeInScale {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.95); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.info-toast-icon {
  width: 48px;
  height: 48px;
  background: var(--color-success-light);
  color: var(--color-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.info-toast-message {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
}

.info-toast-sub {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.info-toast-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 250;
  animation: fadeIn 0.2s ease;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 640px) {
  .header {
    padding: 0 var(--space-4);
  }

  .brand {
    display: none;
  }

  .progress-container {
    display: none !important;
  }

  .main {
    padding: calc(64px + var(--space-4)) var(--space-3) calc(80px + var(--space-4));
  }

  .content-card {
    border-radius: var(--radius-lg);
  }

  .content-area {
    padding: var(--space-5);
  }

  .input-bar {
    padding: var(--space-3) var(--space-4);
  }

  .input-container {
    flex-direction: column;
  }

  .action-button {
    width: 100%;
  }

  .stats-container {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.loading-skeleton {
  background: linear-gradient(90deg, var(--color-bg-subtle) 25%, var(--color-border-light) 50%, var(--color-bg-subtle) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Login Overlay (Auth0)
   ========================================================================== */

.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-card {
  background: var(--color-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-10);
  text-align: center;
  max-width: 400px;
  width: 90%;
}

.login-logo {
  width: 64px;
  height: 64px;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0 auto var(--space-6);
}

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

.login-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.login-button {
  width: 100%;
  height: 48px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: white;
  background: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.login-button:hover {
  background: var(--color-primary-dark);
}

.login-button:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

/* ==========================================================================
   Logout Button
   ========================================================================== */

.logout-button {
  height: 32px;
  padding: 0 var(--space-3);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-left: var(--space-3);
}

.logout-button:hover {
  color: var(--color-error);
  border-color: var(--color-error);
  background: var(--color-error-light);
}

/* ==========================================================================
   User Info Updates for Auth
   ========================================================================== */

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.user-id {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   Hint Button and Modal
   ========================================================================== */

.hint-button {
  height: 44px;
  padding: 0 var(--space-4);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-right: var(--space-2);
}

.hint-button:hover {
  background: var(--color-bg-subtle);
  border-color: var(--color-primary);
}

.hint-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(4px);
}

.hint-modal {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 10001;
  border: 1px solid var(--color-border);
}

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

.hint-modal-header h3 {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

.hint-modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.hint-modal-close:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text);
}

.hint-modal-body {
  padding: var(--space-4);
  overflow-y: auto;
}

.hint-context-textarea {
  width: 100%;
  padding: var(--space-3);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  resize: vertical;
  margin: var(--space-3) 0;
}

.hint-context-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-card);
}

.hint-modal-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
  margin-top: var(--space-4);
}

.hint-modal-button {
  height: 40px;
  padding: 0 var(--space-4);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hint-modal-button.primary {
  background: var(--color-primary);
  color: white;
}

.hint-modal-button.primary:hover {
  background: var(--color-primary-dark);
}

.hint-modal-button.secondary {
  background: var(--color-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.hint-modal-button.secondary:hover {
  background: var(--color-bg-subtle);
}

.hint-content {
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.hint-icon {
  font-size: 32px;
  text-align: center;
  margin-bottom: var(--space-3);
}

.hint-text {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  white-space: pre-wrap;
}

.hint-loading {
  text-align: center;
  padding: var(--space-6);
  color: var(--color-text-secondary);
  font-style: italic;
}

.hint-error {
  text-align: center;
}

.hint-error .hint-text {
  color: var(--color-error);
}