/* Modern design system with full accessibility support */

:root {
  /* Color System - WCAG AA compliant */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;

  /* Neutral Colors */
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-elevated: #334155;
  --color-border: #475569;

  /* Text Colors */
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --sidebar-width: 280px;
  --header-height: 70px;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Skip Link for Keyboard Navigation */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border-radius: 0 0 var(--spacing-xs) 0;
  font-weight: 600;
  z-index: 10000;
}

.skip-link:focus {
  top: 0;
}

/* App Container */
.app-container {
  display: flex;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 1001;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-toggle:hover {
  background: var(--color-surface-elevated);
}

.sidebar-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  padding-top: calc(var(--header-height) + var(--spacing-md));
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  z-index: 1000;
}

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

.sidebar-header {
  margin-bottom: var(--spacing-xl);
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--spacing-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.sidebar-link:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
}

.sidebar-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.sidebar-link.new-chat-btn {
  background: var(--color-primary);
  color: white;
}

.sidebar-link.new-chat-btn:hover {
  background: var(--color-primary-hover);
}

.sidebar-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-md) 0;
}

.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  margin: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
}

/* Saved Chats */
.saved-chat {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.chat-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-menu {
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.saved-chat:hover .chat-menu,
.saved-chat:focus-within .chat-menu {
  opacity: 1;
}

.ellipsis-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--spacing-xs);
  font-size: 1.25rem;
}

.ellipsis-btn:hover {
  background: var(--color-surface-elevated);
}

.ellipsis-btn:focus-visible {
  outline: 2px solid var(--color-primary);
}

.ellipsis-dropdown {
  position: absolute;
  right: 0;
  top: 100%;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-xs);
  min-width: 160px;
  z-index: 100;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.ellipsis-dropdown button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--color-text-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--spacing-xs);
  cursor: pointer;
  font-size: 0.875rem;
  transition: background var(--transition-fast);
}

.ellipsis-dropdown button:hover {
  background: var(--color-surface);
}

.hidden {
  display: none !important;
}

/* Sidebar Dropdown */
.sidebar-dropdown-trigger {
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

.sidebar-dropdown-trigger .arrow {
  transition: transform var(--transition-fast);
}

.sidebar-dropdown.open .arrow {
  transform: rotate(180deg);
}

.submenu {
  list-style: none;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.sidebar-dropdown.open .submenu {
  max-height: 300px;
}

.submenu-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  padding-left: calc(var(--spacing-xl) + var(--spacing-md));
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--spacing-xs);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.submenu-link:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 0;
  transition: margin-left var(--transition-base);
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.sidebar.expanded ~ .main-content {
  margin-left: var(--sidebar-width);
}

.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
}

/* Chat Header - Transparent overlay */
.chat-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background: transparent;
  padding: var(--spacing-lg) var(--spacing-xl);
  padding-left: calc(var(--spacing-xl) * 3);
  z-index: 100;
  pointer-events: none;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  pointer-events: auto;
  background: transparent;
  padding: var(--spacing-md) var(--spacing-lg);
}

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

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.125rem;
}

.user-name {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.logout-btn,
.auth-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--spacing-sm);
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.logout-btn:hover,
.auth-link:hover {
  background: var(--color-border);
}

.auth-link.primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

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

.auth-links {
  display: flex;
  gap: var(--spacing-sm);
}

/* Messages Area */
.messages-box {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-xl);
  padding-top: calc(var(--header-height) + var(--spacing-xl));
  scroll-behavior: smooth;
}

.messages-box:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -4px;
}

.messages-box::-webkit-scrollbar {
  width: 8px;
}

.messages-box::-webkit-scrollbar-track {
  background: var(--color-surface);
}

.messages-box::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.messages-box::-webkit-scrollbar-thumb:hover {
  background: var(--color-surface-elevated);
}

.messages-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

/* Message Bubbles */
.message {
  display: flex;
  gap: var(--spacing-md);
  animation: message-appear 0.3s ease-out;
}

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

.message.sent {
  justify-content: flex-end;
}

.message.sent .message-text {
  background: var(--color-primary);
  color: white;
  border-radius: var(--spacing-md) var(--spacing-md) var(--spacing-xs) var(--spacing-md);
}

.message.received {
  justify-content: flex-start;
}

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.message-text {
  background: var(--color-surface);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--spacing-md);
  max-width: 70%;
}

.message-sender {
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.message-content {
  word-wrap: break-word;
  line-height: 1.6;
}

/* Typing Indicator */
.typing-indicator .message-content {
  display: flex;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) 0;
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  animation: typing-pulse 1.4s infinite ease-in-out;
}

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

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

@keyframes typing-pulse {
  0%,
  80%,
  100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Added loading steps with list items showing progress */
.loading-steps-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--spacing-sm);
  background: var(--color-surface-elevated);
  opacity: 0.5;
  transition: all var(--transition-base);
  border-left: 3px solid transparent;
}

.loading-step.active {
  opacity: 1;
  background: var(--color-surface);
  border-left-color: var(--color-primary);
  transform: translateX(4px);
}

.loading-step.active .step-text {
  font-weight: 600;
  color: var(--color-text-primary);
}

.loading-step.completed {
  opacity: 1;
  border-left-color: var(--color-success);
}

.loading-step.completed .step-text {
  color: var(--color-text-secondary);
}

.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.loading-step.pending .step-icon,
.loading-step.active .step-icon {
  animation: spin 2s linear infinite;
  color: var(--color-primary);
}

.loading-step.completed .step-icon {
  animation: none;
  color: var(--color-success);
}

.loading-step.completed .step-icon::before {
  content: "✓";
  font-weight: bold;
}

.step-text {
  flex: 1;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Input Form */
.message-form {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) var(--spacing-xl);
}

.input-container {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-md);
  max-width: 900px;
  margin: 0 auto;
}

.file-upload-btn {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-md);
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.file-upload-btn:hover {
  background: var(--color-border);
}

.file-upload-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

#file-upload {
  display: none;
}

.editor-wrapper {
  flex: 1;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  overflow: hidden;
}

#rich-editor {
  min-height: 100px;
  color: var(--color-text-primary);
}

#rich-editor .ql-toolbar {
  background: var(--color-surface);
  border: none;
  border-bottom: 1px solid var(--color-border);
}

#rich-editor .ql-container {
  border: none;
  font-size: 0.9375rem;
}

#rich-editor .ql-editor {
  min-height: 100px;
  max-height: 300px; /* Added max-height to prevent unbounded growth */
  overflow-y: auto; /* Added overflow for scrollability */
  color: var(--color-text-primary);
}

/* Adding placeholder text color styling for Quill editor */
#rich-editor .ql-editor.ql-blank::before {
  color: var(--color-text-tertiary);
  opacity: 0.6;
  font-style: normal;
}

.send-btn {
  background: var(--color-primary);
  border: none;
  border-radius: var(--spacing-sm);
  padding: var(--spacing-md);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

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

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

.send-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Quiz Styles in Messages */
.trivial-quiz-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.trivial-quiz-form h3,
.trivial-quiz-form h4 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.trivial-quiz-form select {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-primary);
  font-family: inherit;
  margin: var(--spacing-sm) 0;
}

.trivial-quiz-form select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Added quiz progress container styles */
.quiz-progress-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.quiz-progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.quiz-progress-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.quiz-question-counter {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: var(--color-surface-elevated);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--spacing-sm);
}

.quiz-progress-bar {
  width: 100%;
  height: 12px;
  background: var(--color-surface-elevated);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
  margin-bottom: var(--spacing-sm);
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  border-radius: 999px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.quiz-progress-fill::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: progress-shimmer 2s infinite;
}

@keyframes progress-shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

.quiz-progress-percentage {
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.quiz-navigation-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: space-between;
  flex-wrap: wrap;
}

.quiz-nav-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--spacing-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex: 1;
  min-width: 120px;
  justify-content: center;
}

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

.quiz-nav-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.quiz-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

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

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

.submit-quiz-btn,
.btn-info {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--spacing-sm);
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--spacing-md);
  margin-right: var(--spacing-sm);
}

.submit-quiz-btn {
  background: var(--color-success);
  color: white;
  display: none;
}

.submit-quiz-btn:hover:not(:disabled) {
  background: #059669;
}

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

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

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

/* Result Colors */
.green-text {
  color: var(--color-success);
  font-weight: 600;
}

.red-text {
  color: var(--color-danger);
  font-weight: 600;
}

/* Color coding for quiz answer comparisons */
.answer-correct-color {
  color: var(--color-success) !important;
  font-weight: 600;
}

.answer-incorrect-color {
  color: var(--color-danger) !important;
  font-weight: 600;
}

/* Enhance the answer text visibility */
.answer-text {
  font-size: 1rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
}

.answer-text.answer-correct-color {
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-success);
}

.answer-text.answer-incorrect-color {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-danger);
}

/* Completely redesigned quiz results with modern, high-tech styling */
/* Quiz Results Container - Main wrapper for all results */
.quiz-results-container {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-md);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  animation: results-appear 0.5s ease-out;
}

@keyframes results-appear {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Results Header with Score Display */
.quiz-results-header {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--color-surface-elevated);
  border-radius: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.quiz-results-header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%,
  100% {
    opacity: 0.5;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.1);
  }
}

.score-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.score-main {
  font-size: 3.5rem;
  font-weight: 700;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--color-primary), var(--color-success));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(37, 99, 235, 0.3);
}

.score-percentage {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  opacity: 0.8;
}

.results-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
  position: relative;
  z-index: 1;
}

/* Results List - Contains all individual result items */
.quiz-results-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

/* Individual Result Item */
.quiz-result-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-sm);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.quiz-result-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
}

/* Adding responsive media queries for mobile devices */
@media (max-width: 768px) {
  .chat-header {
    padding: var(--spacing-md) var(--spacing-lg);
    padding-left: calc(var(--spacing-xl) * 2.5);
  }

  .header-content {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .messages-box {
    padding-top: calc(var(--header-height) + var(--spacing-md));
  }

  .auth-links {
    width: 100%;
    justify-content: flex-start;
  }

  .quiz-navigation-buttons {
    gap: var(--spacing-sm);
  }

  .quiz-nav-btn {
    flex: 1 1 calc(50% - var(--spacing-sm) / 2); /* Two buttons per row on tablets */
    min-width: 100px;
    font-size: 0.8125rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .quiz-progress-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .sidebar {
    width: 280px;
    max-width: 85vw;
  }

  .chat-header {
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: calc(var(--spacing-xl) + var(--spacing-lg));
  }

  .header-content {
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .user-name {
    font-size: 0.8125rem;
  }

  .logout-btn,
  .auth-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
  }

  .messages-box {
    padding: var(--spacing-md);
    padding-top: calc(var(--header-height) + var(--spacing-sm));
  }

  .message-text {
    max-width: 85%;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .input-container {
    gap: var(--spacing-sm);
  }

  .file-upload-btn,
  .send-btn {
    padding: var(--spacing-sm);
  }

  .quiz-navigation-buttons {
    flex-direction: column; /* Stack buttons vertically on small phones */
    width: 100%;
  }

  .quiz-nav-btn {
    flex: 1 1 100%; /* Full width on mobile */
    min-width: 0; /* Remove min-width constraint */
    max-width: 100%;
    width: 100%;
    font-size: 0.875rem;
    padding: var(--spacing-md);
  }

  .quiz-progress-title {
    font-size: 1rem;
  }

  .quiz-question-counter {
    font-size: 0.8125rem;
  }

  .submit-quiz-btn,
  .btn-info {
    width: 100%;
    margin-right: 0;
    margin-bottom: var(--spacing-sm);
  }

  .score-main {
    font-size: 2.5rem;
  }

  .score-percentage {
    font-size: 1.25rem;
  }

  .results-title {
    font-size: 1.25rem;
  }
}

@media (max-width: 360px) {
  .quiz-nav-btn {
    font-size: 0.8125rem;
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
  }

  .quiz-nav-btn .material-symbols-outlined {
    font-size: 1rem;
  }
}