/* ============================================
   AI Diagnostics - Enhanced Professional Styling
   User-friendly design for all experience levels
   ============================================ */

/* ============================================
   AI Diagnostics Hero Section V2 - REDESIGNED
   ============================================ */

.diagnostics-hero-v2 {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.03) 0%,
    rgba(118, 75, 162, 0.03) 100%
  );
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-2xl);
  margin-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

/* Subtle animated background pattern */
.diagnostics-hero-v2::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 30%,
      rgba(102, 126, 234, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(118, 75, 162, 0.05) 0%,
      transparent 50%
    );
  pointer-events: none;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-10px, -10px);
  }
}

.diagnostics-hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-3xl) auto;
  position: relative;
  z-index: 1;
}

.diagnostics-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--ai-gradient);
  color: white;
  border-radius: 100px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-lg);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
  }
}

.diagnostics-badge svg {
  animation: spin 3s linear infinite;
}

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

.diagnostics-hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.gradient-text {
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.diagnostics-hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* ============================================
   Interactive Tool Cards Grid
   ============================================ */

.diagnostics-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  position: relative;
  z-index: 1;
}

.diagnostic-tool-card {
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Hover gradient overlay */
.diagnostic-tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.05) 0%,
    rgba(118, 75, 162, 0.05) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.diagnostic-tool-card:hover {
  border-color: var(--ai-color-start);
  box-shadow: 0 12px 40px rgba(102, 126, 234, 0.15),
    0 0 0 1px rgba(102, 126, 234, 0.1);
  /* Removed transform and overlay for cleaner UX */
}

.diagnostic-tool-card:hover::before {
  opacity: 0; /* Disabled gradient overlay */
}

/* Tool Card Content */
.tool-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  position: relative;
  z-index: 1;
}

.tool-card-description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
  position: relative;
  z-index: 1;
}

/* Tool Card Footer */
.tool-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  position: relative;
  z-index: 1;
}

.tool-card-tag {
  font-size: var(--font-size-sm);
  color: var(--ai-color-start);
  font-weight: var(--font-weight-semibold);
}

.tool-card-arrow {
  color: var(--color-text-tertiary);
  transition: all 0.3s ease;
}

.diagnostic-tool-card:hover .tool-card-arrow {
  color: var(--ai-color-start);
  /* Removed transform - no movement */
}

/* Active State for Tool Cards */
.diagnostic-tool-card.active {
  border-color: var(--ai-color-start);
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.05) 0%,
    rgba(118, 75, 162, 0.05) 100%
  );
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.2),
    0 0 0 1px var(--ai-color-start);
}

.diagnostic-tool-card.active::before {
  opacity: 1;
}

.diagnostic-tool-card.active .tool-card-arrow {
  color: var(--ai-color-start);
}

.diagnostic-tool-card.active .tool-card-tag {
  color: var(--ai-color-start);
  font-weight: var(--font-weight-bold);
}

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

@media (max-width: 768px) {
  .diagnostics-hero-v2 {
    padding: var(--space-2xl) var(--space-lg);
  }

  .diagnostics-tools-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .diagnostics-hero-content {
    margin-bottom: var(--space-2xl);
  }

  .diagnostic-tool-card {
    padding: var(--space-lg);
  }
}

/* ============================================
   OLD HERO SECTION (Keep for backwards compatibility)
   ============================================ */

.diagnostics-hero {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.05) 0%,
    rgba(118, 75, 162, 0.05) 100%
  );
  border: 2px solid var(--ai-color-start);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.diagnostics-hero.demo-hero {
  margin-bottom: var(--space-2xl);
}

.demo-cta-card {
  max-width: 800px;
  margin: 0 auto;
}

.demo-cta-actions {
  margin-top: var(--space-lg);
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.diagnostics-hero h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.diagnostics-hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto var(--space-xl) auto;
  line-height: var(--line-height-relaxed);
}

.diagnostics-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.diagnostics-feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.diagnostics-feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--ai-color-start);
}

.diagnostics-feature-icon {
  width: 48px;
  height: 48px;
  background: var(--ai-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.diagnostics-feature h3 {
  font-size: var(--font-size-base);
  margin: 0;
  color: var(--color-text);
}

.diagnostics-feature p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  text-align: center;
}

/* ============================================
   Enhanced Diagnostics Container
   ============================================ */

.diagnostics-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

/* ============================================
   Enhanced Sidebar Navigation
   ============================================ */

.diagnostics-sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.diagnostics-sidebar h3 {
  font-size: var(--font-size-lg);
  margin: 0 0 var(--space-md) 0;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.diagnostic-tool-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.diagnostic-tool-btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--ai-gradient);
  transform: scaleY(0);
  transition: transform var(--transition-base);
}

.diagnostic-tool-btn:hover {
  background: var(--color-bg-secondary);
  border-color: var(--ai-color-start);
  transform: translateX(4px);
}

.diagnostic-tool-btn:hover::before {
  transform: scaleY(1);
}

.diagnostic-tool-btn.active {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.1) 0%,
    rgba(118, 75, 162, 0.1) 100%
  );
  color: var(--ai-color-start);
  border-color: var(--ai-color-start);
  font-weight: var(--font-weight-semibold);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.diagnostic-tool-btn.active::before {
  transform: scaleY(1);
}

.diagnostic-tool-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.diagnostic-tool-text {
  flex: 1;
}

.diagnostic-tool-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  margin-top: var(--space-xs);
  line-height: 1.4;
}

/* ============================================
   Enhanced Content Panel
   ============================================ */

.diagnostics-content {
  background: var(--color-bg-elevated);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  min-height: 600px;
  box-shadow: var(--shadow-md);
}

.diagnostic-panel {
  display: none;
  animation: fadeInSlide 0.3s ease-out;
}

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

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

/* ============================================
   Panel Headers with Icons
   ============================================ */

.diagnostic-panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--color-border);
}

.diagnostic-panel-icon {
  width: 56px;
  height: 56px;
  background: var(--ai-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.diagnostic-panel-title {
  flex: 1;
}

.diagnostic-panel h3 {
  margin: 0 0 var(--space-xs) 0;
  font-size: var(--font-size-2xl);
  color: var(--color-text);
}

.diagnostic-panel > p,
.diagnostic-panel-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  margin: 0 0 var(--space-xl) 0;
}

/* ============================================
   Help Cards & Tips
   ============================================ */

.help-card {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.05) 0%,
    rgba(118, 75, 162, 0.05) 100%
  );
  border: 1px solid var(--ai-color-start);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.help-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.help-card-icon {
  font-size: var(--font-size-xl);
}

.help-card-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
}

.help-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

.help-card ul {
  margin: var(--space-sm) 0 0 var(--space-lg);
  padding: 0;
}

.help-card li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

/* ============================================
   Example Prompts
   ============================================ */

.example-prompts {
  margin-bottom: var(--space-xl);
}

.example-prompts-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.example-prompts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-sm);
}

.example-prompt-btn {
  padding: var(--space-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  line-height: 1.4;
}

.example-prompt-btn:hover {
  background: var(--ai-gradient);
  color: white;
  border-color: var(--ai-color-start);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

/* ============================================
   Enhanced Input Groups
   ============================================ */

.code-input-group {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.code-input-group input {
  flex: 1;
  padding: var(--space-lg);
  font-size: var(--font-size-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family-mono);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  transition: all var(--transition-fast);
}

.code-input-group input:focus {
  outline: none;
  border-color: var(--ai-color-start);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.code-input-group input::placeholder {
  text-transform: none;
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-normal);
}

.code-input-group .btn-primary {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  background: var(--ai-gradient);
  border: none;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.code-input-group .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.symptom-analyze-btn {
  margin-top: var(--space-md);
}

/* ============================================
   Enhanced Results Display
   ============================================ */

.code-results,
.vin-results,
.symptom-results {
  margin-top: var(--space-xl);
  animation: fadeInSlide 0.4s ease-out;
}

.result-card {
  background: var(--color-bg);
  border: 2px solid var(--ai-color-start);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.1);
}

.result-card h4 {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.result-code-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--ai-gradient);
  color: white;
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
}

.result-section {
  margin-bottom: var(--space-xl);
}

.result-section:last-child {
  margin-bottom: 0;
}

.result-section h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.result-section h5::before {
  content: "▸";
  color: var(--ai-color-start);
  font-weight: var(--font-weight-bold);
}

.result-section p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.result-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.result-section li {
  display: flex;
  align-items: start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.result-section li::before {
  content: "✓";
  color: var(--ai-color-start);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  margin-top: 2px;
}

.severity-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.severity-badge.critical {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
  border: 1px solid rgba(220, 38, 38, 0.3);
}

.severity-badge.high {
  background: rgba(234, 88, 12, 0.1);
  color: #ea580c;
  border: 1px solid rgba(234, 88, 12, 0.3);
}

.severity-badge.moderate {
  background: rgba(234, 179, 8, 0.1);
  color: #eab308;
  border: 1px solid rgba(234, 179, 8, 0.3);
}

.severity-badge.low {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

/* ============================================
   Enhanced Chat Container
   ============================================ */

.chat-container {
  display: flex;
  flex-direction: column;
  height: 600px;
  background: var(--color-bg);
  border: 2px solid var(--ai-color-start);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  scroll-behavior: smooth;
  background: var(--color-bg);
}

.chat-message {
  display: flex;
  gap: var(--space-md);
  animation: slideInMessage 0.3s ease-out;
  max-width: 85%;
}

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

.chat-message.user {
  flex-direction: row-reverse;
  margin-left: auto;
}

.chat-message.user {
  animation-name: slideInMessageUser;
}

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

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ai-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.chat-message.user .message-avatar {
  background: var(--color-text);
}

.message-content {
  flex: 1;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
}

.chat-message.user .message-content {
  background: var(--ai-gradient);
  color: white;
  border-color: var(--ai-color-start);
}

.message-content p {
  margin: 0 0 var(--space-sm) 0;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content strong {
  font-weight: var(--font-weight-bold);
  display: block;
  margin-bottom: var(--space-xs);
}

.message-content ul {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

.message-content li {
  margin-bottom: var(--space-xs);
}

/* ============================================
   Enhanced Chat Input
   ============================================ */

.chat-input-form {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border-top: 2px solid var(--color-border);
}

.chat-input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition-fast);
  resize: none;
  min-height: 50px;
  max-height: 120px;
}

.chat-input:focus {
  outline: none;
  border-color: var(--ai-color-start);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.chat-input::placeholder {
  color: var(--color-text-tertiary);
}

.chat-submit {
  width: 50px;
  height: 50px;
  background: var(--ai-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.chat-submit:hover {
  transform: scale(1.05) rotate(15deg);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

.chat-submit:active {
  transform: scale(0.95) rotate(15deg);
}

/* ============================================
   VIN Spec Grid
   ============================================ */

.vin-spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.vin-spec-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-md);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.vin-spec-item:hover {
  border-color: var(--ai-color-start);
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.1);
}

.vin-spec-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-semibold);
}

.vin-spec-value {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

/* ============================================
   Empty States & Loading
   ============================================ */

.empty-state-enhanced {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-secondary);
}

.empty-state-enhanced svg {
  margin-bottom: var(--space-lg);
  color: var(--color-text-tertiary);
}

.empty-state-enhanced h3 {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.empty-state-enhanced p {
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--line-height-relaxed);
}

.loading-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  color: var(--color-text-secondary);
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--ai-color-start);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================
   Dark Mode Support
   ============================================ */

[data-theme="dark"] .diagnostics-hero {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.1) 0%,
    rgba(118, 75, 162, 0.1) 100%
  );
}

[data-theme="dark"] .help-card {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.1) 0%,
    rgba(118, 75, 162, 0.1) 100%
  );
}

[data-theme="dark"] .diagnostic-tool-btn.active {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.2) 0%,
    rgba(118, 75, 162, 0.2) 100%
  );
}

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

@media (max-width: 1024px) {
  .diagnostics-container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .diagnostics-sidebar {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding: var(--space-md);
  }

  .diagnostics-sidebar h3 {
    display: none;
  }

  .diagnostic-tool-text {
    white-space: nowrap;
  }

  .diagnostic-tool-desc {
    display: none;
  }
}

@media (max-width: 768px) {
  .diagnostics-hero {
    padding: var(--space-xl);
  }

  .diagnostics-hero h2 {
    font-size: var(--font-size-2xl);
  }

  .diagnostics-content {
    padding: var(--space-lg);
  }

  .code-input-group {
    flex-direction: column;
  }

  .code-input-group .btn-primary {
    width: 100%;
  }

  .chat-container {
    height: 500px;
  }

  .chat-message {
    max-width: 90%;
  }

  .message-avatar {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-xs);
  }

  .example-prompts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .diagnostics-features {
    grid-template-columns: 1fr;
  }

  .diagnostics-hero h2 {
    font-size: var(--font-size-xl);
  }

  .diagnostic-panel h3 {
    font-size: var(--font-size-xl);
  }

  .chat-container {
    height: 400px;
  }

  .vin-spec-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Results Empty States
   ============================================ */

.results-empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  color: var(--color-text-secondary);
}

.results-empty-state svg {
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-lg);
  opacity: 0.4;
}

.results-empty-state h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.results-empty-state p {
  font-size: var(--font-size-sm);
  line-height: 1.6;
  max-width: 400px;
  margin: 0 auto;
}

/* ============================================
   Input Validation States
   ============================================ */

.input-valid {
  border-color: var(--color-success, #00cc00) !important;
  box-shadow: 0 0 0 3px rgba(0, 204, 0, 0.1);
}

.input-invalid {
  border-color: var(--color-error, #cc0000) !important;
  box-shadow: 0 0 0 3px rgba(204, 0, 0, 0.1);
}

.input-valid:focus,
.input-invalid:focus {
  outline: none;
}

/* ============================================
   Accessibility Enhancements
   ============================================ */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus states */
.diagnostic-tool-btn:focus-visible,
.example-prompt-btn:focus-visible,
.chat-input:focus-visible,
.chat-submit:focus-visible,
.code-input-group input:focus-visible {
  outline: 3px solid var(--ai-color-start);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   AI-Powered Results Styling
   ============================================ */

.ai-result {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.03) 0%,
    rgba(118, 75, 162, 0.03) 100%
  );
  border: 2px solid var(--ai-color-start);
}

.result-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--color-border);
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
}

.vehicle-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.result-analysis {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.result-analysis p {
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
  white-space: pre-line;
}

.result-analysis strong {
  color: var(--ai-color-start);
  font-weight: var(--font-weight-bold);
  display: block;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-lg);
}

.result-analysis ul {
  list-style: none;
  margin: var(--space-md) 0;
  padding: 0;
}

.result-analysis li {
  display: flex;
  align-items: start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.result-analysis li::before {
  content: "→";
  color: var(--ai-color-start);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  margin-top: 2px;
}

.result-footer {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.result-timestamp {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  font-style: italic;
  margin: 0;
}

.symptom-description {
  background: var(--color-bg-secondary);
  border-left: 4px solid var(--ai-color-start);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-sm);
}

.symptom-description strong {
  color: var(--color-text);
  font-size: var(--font-size-base);
  display: block;
  margin-bottom: var(--space-sm);
}

.symptom-description p {
  color: var(--color-text-secondary);
  font-style: italic;
  margin: 0;
}

/* Responsive adjustments for AI results */
@media (max-width: 768px) {
  .result-analysis {
    padding: var(--space-lg);
  }

  .result-header {
    gap: var(--space-sm);
  }
}