/* Custom DrainageGPT Styles - Mobile-First Elite Edition */
:root {
  --primary-blue: #3b82f6;
  --secondary-blue: #1e40af;
  --success-green: #059669;
  --warning-orange: #d97706;
  --danger-red: #dc2626;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-400: #9ca3af;
  --gray-600: #6b7280;
  --gray-700: #374151;
  --gray-900: #1f2937;
  
  /* Touch-optimized spacing */
  --touch-target: 48px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
}

/* Mobile-first typography - 16px minimum to prevent iOS zoom */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  background-color: white;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: rgba(59, 130, 246, 0.2);
}

/* Landing Page Styles */
.landing-view {
  min-height: 100vh;
  background: white;
  display: flex;
  align-items: center;
  padding: 2rem 0;
}

.landing-content {
  padding: 2rem 1rem;
}

.landing-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.landing-subtitle {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: 0;
  line-height: 1.5;
}

.landing-form .form-control {
  border: 2px solid var(--gray-200);
  border-radius: 12px 0 0 12px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 16px;
  min-height: var(--touch-target);
  transition: border-color 0.2s ease;
}

.landing-form .form-control:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  outline: none;
}

.landing-form .btn {
  border-radius: 0 12px 12px 0;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  border: 2px solid var(--primary-blue);
  min-height: var(--touch-target);
  min-width: 100px;
}

/* Quote Upload Section */
.quote-section {
  margin-top: 1.5rem;
}

.upload-area {
  border: 1px dashed var(--gray-300);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: var(--gray-50);
  position: relative;
  overflow: hidden;
  max-width: 100%;
  box-sizing: border-box;
}

.upload-area:hover {
  border-color: var(--gray-400);
  background: var(--gray-100);
}

.upload-area p {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: var(--gray-600);
}

.file-input {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
  box-sizing: border-box;
}

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

.quote-status {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  margin-top: 1rem;
}

.quote-status.success {
  background: rgba(5, 150, 105, 0.1);
  color: var(--success-green);
  border: 1px solid rgba(5, 150, 105, 0.2);
}

.quote-status.error {
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger-red);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.quote-status.loading {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary-blue);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.disclaimer {
  margin-top: 2rem;
  text-align: center;
}

/* Chat View Styles */
.chat-view {
  display: none;
  height: 100vh;
  background: white;
}

.chat-container {
  height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 1000px;
  margin: 0 auto;
  background: white;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

.chat-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-200);
  background: linear-gradient(135deg, var(--gray-50), white);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-transcript {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  background: var(--gray-50);
}

.chat-composer {
  padding: 1.5rem;
  border-top: 1px solid var(--gray-200);
  background: white;
}

.composer-form .form-control {
  border-radius: 12px;
  border: 2px solid var(--gray-200);
  padding: var(--spacing-sm) var(--spacing-md);
  resize: none;
  min-height: var(--touch-target);
  max-height: 120px;
  font-size: 16px;
  line-height: 1.5;
}

.composer-form .form-control:focus {
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  outline: none;
}

.composer-form .btn {
  border-radius: 12px;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  min-height: var(--touch-target);
  min-width: var(--touch-target);
}

/* Message Styles - Mobile-Optimized */
.message {
  margin-bottom: var(--spacing-md);
  display: flex;
  max-width: 85%;
  animation: fadeIn 0.3s ease-in;
}

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

.message.user {
  margin-left: auto;
  max-width: 85%;
}

.message.assistant {
  margin-right: auto;
  max-width: 90%;
}

.message-content {
  padding: var(--spacing-sm) var(--spacing-md);
  word-wrap: break-word;
  line-height: 1.4;
  font-size: 15px;
}

.message.user .message-content {
  background: var(--primary-blue);
  color: white;
  border-radius: 18px 18px 4px 18px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message.assistant .message-content {
  background: white;
  color: var(--gray-900);
  border: 1px solid var(--gray-200);
  border-radius: 18px 18px 18px 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* Typing Animation */
.typing-indicator {
  display: inline-block;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

/* Responsive Design - Mobile-First Breakpoints */

/* Tablet (md) - 769px to 1024px */
@media (min-width: 769px) {
  .landing-title {
    font-size: 3rem;
  }
  
  .message.user {
    max-width: 70%;
  }
  
  .message.assistant {
    max-width: 75%;
  }
}

/* Desktop (lg) - 1025px+ */
@media (min-width: 1025px) {
  .landing-title {
    font-size: 3.5rem;
  }
  
  .chat-container {
    max-width: 900px;
  }
}

/* Mobile Optimizations - 768px and below */
@media (max-width: 768px) {
  .landing-content {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .landing-title {
    font-size: 2rem;
  }
  
  .chat-container {
    height: 100vh;
    margin: 0;
    box-shadow: none;
  }
  
  .chat-header,
  .chat-composer {
    padding: var(--spacing-md);
  }
  
  .chat-transcript {
    padding: var(--spacing-md);
  }
  
  .chat-header h1 {
    font-size: 1.25rem;
  }
}

/* Small Mobile - 480px and below */
@media (max-width: 480px) {
  .landing-form .input-group {
    flex-direction: column;
  }
  
  .landing-form .form-control,
  .landing-form .btn {
    border-radius: 12px;
    width: 100%;
  }
  
  .landing-form .btn {
    margin-top: var(--spacing-sm);
  }
  
  .message.user,
  .message.assistant {
    max-width: 90%;
  }
}

/* Loading States */
.btn:disabled {
  cursor: not-allowed;
}

.spinner-border-sm {
  width: 1rem;
  height: 1rem;
}

/* Utility Classes */
.text-decoration-none {
  text-decoration: none !important;
}

.text-decoration-none:hover {
  text-decoration: underline !important;
}

/* Lead Capture Modal - Mobile-First */
.lead-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  animation: fadeIn 0.3s ease-in;
}

.lead-modal.show {
  display: flex;
}

.lead-modal-content {
  background: white;
  border-radius: 16px;
  padding: var(--spacing-xl);
  max-width: 500px;
  width: 100%;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.lead-modal h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.lead-modal p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-lg);
  font-size: 15px;
}

.lead-modal .form-group {
  margin-bottom: var(--spacing-md);
}

.lead-modal label {
  display: block;
  font-weight: 500;
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: var(--spacing-xs);
}

.lead-modal input,
.lead-modal select {
  width: 100%;
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--gray-200);
  border-radius: 12px;
  font-size: 16px;
  transition: border-color 0.2s ease;
}

.lead-modal input:focus,
.lead-modal select:focus {
  border-color: var(--primary-blue);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.lead-modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.lead-modal-actions button {
  flex: 1;
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.lead-modal-actions .btn-submit {
  background: var(--primary-blue);
  color: white;
}

.lead-modal-actions .btn-submit:hover {
  background: var(--secondary-blue);
  transform: translateY(-1px);
}

.lead-modal-actions .btn-skip {
  background: var(--gray-100);
  color: var(--gray-700);
}

.lead-modal-actions .btn-skip:hover {
  background: var(--gray-200);
}

.lead-error {
  color: var(--danger-red);
  font-size: 14px;
  margin-top: var(--spacing-xs);
  display: none;
}

.lead-error.show {
  display: block;
}

/* Symptom Checker Options - Touch-Optimized */
.options-container {
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--gray-50);
  border-radius: 12px;
}

.options-container button {
  min-width: 80px;
  flex: 1;
  max-width: 150px;
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 2px solid var(--gray-200);
}

.options-container button:hover,
.options-container button:active {
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
  border-color: var(--primary-blue);
}

@media (max-width: 576px) {
  .options-container button {
    flex: 1 1 calc(50% - 0.375rem);
    max-width: none;
  }
}

/* Authority Statement - AEO/GEO Optimization */
.authority-statement {
  font-size: 0.85rem;
  color: var(--gray-600);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(16, 185, 129, 0.08));
  padding: 0.5rem 1rem;
  border-radius: 20px;
  display: inline-block;
  margin-top: 0.5rem;
  border: 1px solid rgba(59, 130, 246, 0.15);
}

/* Quick Answer Block - AI Citation Optimization */
.quick-answer,
.key-answer {
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
  border-left: 4px solid var(--primary-blue);
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  border-radius: 0 8px 8px 0;
  font-size: 1rem;
  line-height: 1.6;
}

.quick-answer strong,
.key-answer strong {
  color: var(--secondary-blue);
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Source Attribution - Citation Triggers */
.source-attribution {
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--gray-200);
  font-style: italic;
}

/* Regulator Mention Styling */
.regulator-mention {
  background: #fefce8;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
  color: #854d0e;
}