/* Modern Design System for Saarthi */

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #6366f1;
  --accent-color: #6366f1;
  --background: #f8fafc;
  --surface: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Modern Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Modern Header */
.modern-header {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 2rem 0;
  position: relative;
  overflow: hidden;
}

.modern-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.modern-header .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.modern-header h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(45deg, #fff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modern-header p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* Modern Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

/* Modern Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.card-icon.primary {
  background: var(--primary-color);
}

.card-icon.secondary {
  background: var(--secondary-color);
}

.card-icon.accent {
  background: var(--accent-color);
}

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
  color: var(--text-secondary);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-dots {
  display: inline-flex;
  gap: 0.25rem;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-color);
  animation: dots 1.4s infinite ease-in-out;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes dots {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Modern Form Elements */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--surface);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder {
  color: var(--text-secondary);
}

/* File Upload */
.file-upload {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

.file-upload input[type=file] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-upload-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
}

.file-upload-label:hover {
  border-color: var(--primary-color);
  background: rgba(99, 102, 241, 0.05);
}

/* Modern Chat Interface */
.chat-container {
  max-width: 800px;
  margin: 2rem auto;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.chat-header {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 1.5rem;
  text-align: center;
}

.chat-header h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0;
}

.chat-messages {
  height: 400px;
  overflow-y: auto;
  padding: 1rem;
  background: var(--background);
}

.message {
  margin-bottom: 1rem;
  display: flex;
  gap: 0.75rem;
}

.message.user {
  flex-direction: row-reverse;
}

.message-content {
  max-width: 70%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  position: relative;
}

.message.user .message-content {
  background: var(--primary-color);
  color: white;
  border-bottom-right-radius: 4px;
}

.message.bot .message-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: white;
}

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

.message.bot .message-avatar {
  background: var(--secondary-color);
}

.chat-input {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.chat-input input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
}

.chat-input button {
  padding: 0.75rem 1.5rem;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
}

.chat-input button:hover {
  background: var(--primary-dark);
}

/* Gemini Output Styling */
.gemini-output {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1rem 0;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.gemini-output h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gemini-output h3::before {
  content: '🤖';
  font-size: 1.25rem;
}

.gemini-output p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.gemini-output ul, .gemini-output ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.gemini-output li {
  margin-bottom: 0.5rem;
}

.gemini-output code {
  background: var(--background);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875rem;
}

.gemini-output pre {
  background: var(--background);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1rem 0;
}

.gemini-output blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 1rem 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .modern-header h1 {
    font-size: 2rem;
  }
  
  .container {
    padding: 0 0.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .chat-messages {
    height: 300px;
  }
  
  .message-content {
    max-width: 85%;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in {
  animation: slideIn 0.4s ease-out;
}

/* Header Stats */
.header-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}

.stat {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
}

.stat i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  opacity: 0.8;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Logo Container */
.logo-container {
  margin-bottom: 2rem;
}

.logo {
  width: 120px;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Features Section */
.features-section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.feature-card {
  text-align: left;
}

.feature-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* CTA Section */
.cta-section {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--background), #f1f5f9);
}

.cta-card {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.cta-card h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Modern Footer */
.modern-footer {
  background: var(--text-primary);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.footer-section p {
  line-height: 1.6;
  opacity: 0.8;
}

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

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

.footer-section ul li a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  text-decoration: none;
  opacity: 0.8;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  opacity: 1;
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.6;
}

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

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 2rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 2rem; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.gap-4 { gap: 1.5rem; }