/* Pana AI Design System */
:root {
  --pana-primary: #1DA1F5;
  --pana-primary-hover: #1891e5;
  --pana-primary-light: #1da1f50d;
  --pana-gray-50: #f9fafb;
  --pana-gray-100: #f3f4f6;
  --pana-gray-200: #e5e7eb;
  --pana-gray-300: #d1d5db;
  --pana-gray-400: #9ca3af;
  --pana-gray-500: #6b7280;
  --pana-gray-600: #4b5563;
  --pana-gray-700: #374151;
  --pana-gray-800: #1f2937;
  --pana-gray-900: #111827;
  
  /* Theme variables */
  --pana-bg-primary: #ffffff;
  --pana-bg-secondary: #f9fafb;
  --pana-text-primary: #111827;
  --pana-text-secondary: #6b7280;
  --pana-border-primary: #e5e7eb;
  --pana-header-bg: rgba(255, 255, 255, 0.95);
}

/* Dark mode variables */
[data-theme="dark"] {
  --pana-primary: #1DA1F5;
  --pana-primary-hover: #3bb3f7;
  --pana-primary-light: #1da1f51a;
  --pana-bg-primary: #111827;
  --pana-bg-secondary: #1f2937;
  --pana-text-primary: #f9fafb;
  --pana-text-secondary: #9ca3af;
  --pana-border-primary: #374151;
  --pana-header-bg: rgba(17, 24, 39, 0.95);
}

/* Base Layout Classes */
.pana-container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .pana-container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .pana-container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* Header Component */
.pana-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--pana-header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--pana-border-primary);
}

.pana-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.pana-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pana-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.pana-nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 768px) {
  .pana-nav-links {
    display: flex;
  }
}

.pana-nav-link {
  color: var(--pana-text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.pana-nav-link:hover {
  color: var(--pana-text-primary);
}

.pana-nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Button Components */
.pana-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.pana-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--pana-primary), 0 0 0 4px rgba(29, 161, 245, 0.2);
}

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

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

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

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

.pana-btn-outline-primary {
  border: 2px solid var(--pana-primary);
  color: var(--pana-primary);
  background-color: transparent;
}

.pana-btn-outline-primary:hover {
  background-color: rgba(29, 161, 245, 0.05);
}

.pana-btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
}

/* Dark Mode Toggle */
.pana-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.5rem;
  background-color: var(--pana-bg-primary);
  color: var(--pana-text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.25rem;
}

.pana-theme-toggle:hover {
  background-color: var(--pana-bg-secondary);
  border-color: var(--pana-primary);
}

.pana-theme-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--pana-primary), 0 0 0 4px rgba(29, 161, 245, 0.2);
}

/* Typography */
.pana-heading-xl {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--pana-text-primary);
}

@media (min-width: 640px) {
  .pana-heading-xl {
    font-size: 3rem;
  }
}

@media (min-width: 1024px) {
  .pana-heading-xl {
    font-size: 3.75rem;
  }
}

.pana-heading-lg {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--pana-text-primary);
}

@media (min-width: 640px) {
  .pana-heading-lg {
    font-size: 2.25rem;
  }
}

.pana-heading-md {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--pana-text-primary);
}

.pana-text-xl {
  font-size: 1.25rem;
  color: var(--pana-text-secondary);
  line-height: 1.6;
}

.pana-text-lg {
  font-size: 1.125rem;
  color: var(--pana-text-secondary);
  line-height: 1.6;
}

.pana-text-base {
  font-size: 1rem;
  color: var(--pana-text-secondary);
  line-height: 1.6;
}

.pana-text-sm {
  font-size: 0.875rem;
  color: var(--pana-text-secondary);
  line-height: 1.5;
}

.pana-text-accent {
  color: var(--pana-primary);
}

/* Section Components */
.pana-section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

@media (min-width: 640px) {
  .pana-section {
    padding-top: 8rem;
    padding-bottom: 8rem;
  }
}

.pana-section-gray {
  background-color: var(--pana-bg-secondary);
}

.pana-section-header {
  text-align: center;
  margin-bottom: 4rem;
}

/* Card Components */
.pana-card {
  background-color: var(--pana-bg-primary);
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.pana-card-hover:hover {
  border-color: var(--pana-primary);
  box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.15);
}

.pana-card-icon {
  width: 4rem;
  height: 4rem;
  background-color: var(--pana-primary-light);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.pana-service-card {
  border: 1px solid var(--pana-gray-200);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-decoration: none;
  display: block;
  transition: all 0.2s ease;
}

.pana-service-card:hover {
  border-color: var(--pana-primary);
  box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.15);
}

.pana-service-icon {
  width: 3rem;
  height: 3rem;
  background-color: var(--pana-primary-light);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  transition: background-color 0.2s ease;
}

.pana-service-card:hover .pana-service-icon {
  background-color: rgba(29, 161, 245, 0.2);
}

/* Grid Layouts */
.pana-grid-3 {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .pana-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pana-grid-4 {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .pana-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .pana-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Footer Component */
.pana-footer {
  background-color: var(--pana-bg-secondary);
  border-top: 1px solid var(--pana-border-primary);
  color: var(--pana-text-secondary);
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.pana-footer-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
}

@media (min-width: 768px) {
  .pana-footer-content {
    flex-direction: row;
    align-items: center;
  }
}

.pana-footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pana-primary);
  margin-bottom: 0.5rem;
}

.pana-footer-tagline {
  color: var(--pana-text-secondary);
}

.pana-footer-links {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 640px) {
  .pana-footer-links {
    flex-direction: row;
  }
}

.pana-footer-section h4 {
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--pana-text-primary);
}

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

.pana-footer-section li {
  margin-bottom: 0.5rem;
}

.pana-footer-link {
  color: var(--pana-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.pana-footer-link:hover {
  color: var(--pana-primary);
}

.pana-footer-bottom {
  border-top: 1px solid var(--pana-border-primary);
  margin-top: 2rem;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--pana-text-secondary);
}

/* Utility Classes */
.pana-text-center {
  text-align: center;
}

.pana-max-w-prose {
  max-width: 65ch;
  margin-left: auto;
  margin-right: auto;
}

.pana-max-w-lg {
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.pana-max-w-3xl {
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

.pana-mb-4 {
  margin-bottom: 1rem;
}

.pana-mb-6 {
  margin-bottom: 1.5rem;
}

.pana-mb-8 {
  margin-bottom: 2rem;
}

.pana-mb-10 {
  margin-bottom: 2.5rem;
}

.pana-cta-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (min-width: 640px) {
  .pana-cta-group {
    flex-direction: row;
  }
}

.pana-cta-group .pana-btn {
  width: 100%;
}

@media (min-width: 640px) {
  .pana-cta-group .pana-btn {
    width: auto;
  }
}

/* Accessibility Enhancements */
html {
  scroll-behavior: smooth;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  background-color: var(--pana-bg-primary);
  color: var(--pana-text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* Enhanced backdrop blur support */
@supports (backdrop-filter: blur(12px)) {
  .pana-header {
    backdrop-filter: blur(12px);
  }
}

/* Mobile-specific styles */
@media (max-width: 767px) {
  .pana-mobile-full {
    width: 100%;
  }
}

/* Service Page Specific Components */
.pana-service-icon-lg {
  display: flex;
  justify-content: center;
  align-items: center;
}

.pana-step-number {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--pana-primary);
  color: white;
  border-radius: 50%;
  font-weight: 600;
  font-size: 1rem;
  flex-shrink: 0;
}

.pana-feature-card {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background-color: var(--pana-bg-primary);
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.75rem;
  transition: all 0.2s ease;
}

.pana-feature-card:hover {
  border-color: var(--pana-primary);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.pana-feature-icon {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 3rem;
  height: 3rem;
  background-color: var(--pana-primary-light);
  border-radius: 0.75rem;
  flex-shrink: 0;
}

.pana-stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background-color: var(--pana-bg-primary);
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.75rem;
}

.pana-stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--pana-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.pana-stat-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pana-text-primary);
  margin-bottom: 0.25rem;
}

.pana-faq-item {
  padding: 1.5rem;
  background-color: var(--pana-bg-primary);
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.75rem;
}

.pana-card-cta {
  padding: 3rem 2rem;
  background: linear-gradient(135deg, var(--pana-primary-light) 0%, var(--pana-gray-50) 100%);
  border: 1px solid var(--pana-gray-200);
  border-radius: 1rem;
  margin: 0 auto;
  max-width: 48rem;
}

/* Responsive adjustments for service pages */
@media (max-width: 768px) {
  .pana-feature-card {
    flex-direction: column;
    text-align: center;
  }
  
  .pana-step-number {
    width: 2rem;
    height: 2rem;
    font-size: 0.875rem;
  }
  
  .pana-stat-number {
    font-size: 2rem;
  }
  
  .pana-card-cta {
    padding: 2rem 1.5rem;
  }
}

/* Chat Iframe Styles */
.pana-chat-iframe {
  width: 80%;
  border: none;
  border-radius: 0.75rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  background-color: var(--pana-bg-primary);
  transition: box-shadow 0.2s ease-in-out;
  height: 70vh !important;
  margin: 0 auto;
}

.pana-chat-iframe:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Chat container for better spacing */
.pana-chat-container {
  padding: 2rem 0;
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Loading state for iframe */
.pana-iframe-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 400px;
  background-color: var(--pana-bg-secondary);
  border-radius: 0.75rem;
  color: var(--pana-text-secondary);
  font-size: 1rem;
}

.pana-iframe-loading::before {
  content: "Loading chat interface...";
}

/* No Agent Message Styles */
.pana-no-agent-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 200px);
  padding: 2rem;
}

.pana-no-agent-content {
  text-align: center;
  max-width: 500px;
  padding: 3rem 2rem;
  background-color: var(--pana-bg-secondary);
  border-radius: 1rem;
  border: 1px solid var(--pana-border-primary);
}

.pana-no-agent-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

.pana-no-agent-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--pana-text-primary);
  margin-bottom: 1rem;
}

.pana-no-agent-description {
  font-size: 1.125rem;
  color: var(--pana-text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.pana-no-agent-example {
  background-color: var(--pana-bg-primary);
  border: 1px solid var(--pana-border-primary);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 2rem;
}

.pana-no-agent-example code {
  font-family: 'Courier New', monospace;
  color: var(--pana-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.pana-no-agent-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Responsive iframe styles */
@media (max-width: 768px) {
  .pana-chat-iframe {
    height: 70vh !important;
    border-radius: 0.5rem;
  }
  
  .pana-chat-container {
    padding: 1rem 0;
  }

  .pana-no-agent-container {
    padding: 1rem;
    min-height: calc(100vh - 150px);
  }

  .pana-no-agent-content {
    padding: 2rem 1.5rem;
  }

  .pana-no-agent-title {
    font-size: 1.75rem;
  }

  .pana-no-agent-description {
    font-size: 1rem;
  }

  .pana-no-agent-actions {
    flex-direction: column;
    align-items: center;
  }

  .pana-no-agent-actions .pana-btn {
    width: 100%;
    max-width: 200px;
  }
}