/* Patent Search AI Tools Specific Styles */

/* CSS Variables */
:root {
  --primary-color: #2563EB;
  --primary-dark: #1D4ED8;
  --secondary-color: #059669;
  --accent-color: #F59E0B;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --patent-blue: #2563EB;
  --patent-green: #059669;
  --patent-purple: #7C3AED;
  --patent-orange: #F59E0B;
  --patent-indigo: #6366f1;
  --patent-gray: #1f2937;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --black: #000000;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.5rem;
  --spacing-2xl: 2rem;
  --spacing-3xl: 3rem;
  --spacing-4xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--patent-blue) 0%, var(--patent-green) 50%, var(--patent-purple) 100%);
  color: white;
  padding: var(--spacing-4xl) 0;
  position: relative;
  overflow: hidden;
}

.hero-section::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="patent" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M25 25L35 35M65 25L75 35M25 75L35 65M65 75L75 65" stroke="white" stroke-width="0.5" opacity="0.1"/><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/><path d="M40 40L60 40M40 50L60 50M40 60L60 60" stroke="white" stroke-width="0.3" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23patent)"/></svg>');
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-xl);
  line-height: 1.1;
  background: linear-gradient(135deg, white 0%, rgba(255, 255, 255, 0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-3xl);
  opacity: 0.95;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-3xl);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Introduction Section */
.intro-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.intro-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.intro-content h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xl);
  color: var(--gray-900);
}

.intro-content > p {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--gray-600);
  margin-bottom: var(--spacing-3xl);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-3xl);
}

.benefit-item {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--gray-50);
  border-radius: 12px;
  transition: transform 0.3s ease;
}

.benefit-item:hover {
  transform: translateY(-4px);
  background: white;
  box-shadow: var(--shadow-lg);
}

.benefit-item i {
  font-size: 2.5rem;
  color: var(--patent-blue);
  margin-bottom: var(--spacing-lg);
}

.benefit-item h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

.benefit-item p {
  color: var(--gray-600);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Tools Grid */
.tools-section {
  padding: var(--spacing-4xl) 0;
  background: var(--gray-50);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.tool-card {
  background: white;
  border-radius: 16px;
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--patent-blue), var(--patent-green), var(--patent-purple));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
}

.tool-logo {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.tool-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tool-badge {
  background: linear-gradient(135deg, var(--patent-blue), var(--patent-green));
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tool-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--gray-900);
}

.tool-description {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.tool-rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.stars {
  display: flex;
  gap: 2px;
}

.stars i {
  color: #fbbf24;
  font-size: 0.875rem;
}

.rating-text {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 500;
}

.tool-info h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: var(--spacing-lg) 0 var(--spacing-md) 0;
  color: var(--gray-800);
}

.tool-info ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-lg) 0;
}

.tool-info li {
  padding: var(--spacing-sm) 0;
  color: var(--gray-600);
  font-size: 0.9rem;
  line-height: 1.6;
  position: relative;
  padding-left: var(--spacing-lg);
}

.tool-info li::before {
  content: '🔍';
  position: absolute;
  left: 0;
  font-size: 0.875rem;
}

.tool-pricing {
  margin: var(--spacing-lg) 0;
}

.price-tag {
  display: inline-block;
  background: var(--gray-100);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 8px;
  font-weight: 600;
  color: var(--gray-800);
}

.tool-actions {
  margin-top: var(--spacing-xl);
}

.btn-primary {
  background: linear-gradient(135deg, var(--patent-blue), var(--patent-green));
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: white;
}

/* FAQ Section */
.faq-section {
  padding: var(--spacing-4xl) 0;
  background: white;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-3xl);
  color: var(--gray-900);
}

.faq-container {
  width: 80%;
  max-width: 900px;
  margin: 0 auto;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.faq-item {
  background: var(--gray-50);
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
  border: 1px solid var(--gray-200);
}

.faq-item:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.faq-question {
  width: 100%;
  padding: var(--spacing-xl);
  background: none;
  border: none;
  text-align: left;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s ease;
}

.faq-question:hover {
  background: white;
}

.faq-icon {
  transition: transform 0.3s ease;
  color: var(--gray-500);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-xl);
  color: var(--gray-700);
  line-height: 1.7;
  font-size: 1rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: white;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-top: 0;
  padding-bottom: var(--spacing-xl);
  opacity: 1;
}

/* Mobile Responsive Updates */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .intro-content h2 {
    font-size: 2rem;
  }

  .intro-content > p {
    font-size: 1rem;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .faq-container {
    width: 100%;
    padding: 0 var(--spacing-md);
  }

  .faq-question {
    font-size: 1rem;
    padding: var(--spacing-lg);
  }

  .faq-answer {
    padding: 0 var(--spacing-lg);
  }

  .faq-item.active .faq-answer {
    padding-bottom: var(--spacing-lg);
  }
}

/* Patent-specific animations */
@keyframes pulse-patent {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(37, 99, 235, 0);
  }
}

.tool-card:hover .tool-logo {
  animation: pulse-patent 2s infinite;
}

/* Patent accessibility enhancements */
.tool-card:focus-within {
  outline: 2px solid var(--patent-blue);
  outline-offset: 2px;
}

.btn-primary:focus {
  outline: 2px solid var(--patent-blue);
  outline-offset: 2px;
}

/* Patent-specific utility classes */
.patent-gradient {
  background: linear-gradient(135deg, var(--patent-blue), var(--patent-green));
}

.patent-text {
  color: var(--patent-blue);
}

.patent-bg {
  background-color: var(--patent-blue);
}