:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary-color: #4f46e5;
  --bg-color: #f8fafc;
  --surface-color: #ffffff;
  --surface-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Layout */
  --container-width: 1280px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #1e3a8a;
  --bg-color: #0f172a;
  --surface-color: #1e293b;
  --surface-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #334155;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.5);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

ul {
  list-style: none;
}

img, svg {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.2;
}

.display-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
}

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 3rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  font-size: 1rem;
  text-decoration: none;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff !important;
  box-shadow: var(--shadow-md);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background-color: var(--surface-hover);
  border-color: var(--text-secondary);
}

/* Header */
.header {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: var(--transition);
}

[data-theme="dark"] .header {
  background-color: rgba(30, 41, 59, 0.9);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.025em;
}

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

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary-color);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::after,
.nav-links a:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--surface-hover);
  color: var(--text-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Home Hero */
.hero {
  padding: 8rem 0 6rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  overflow: hidden;
}

.hero-content {
  max-width: 600px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  padding: 1rem;
}

.hero-image svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

/* Trusted By */
.trusted-by {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-color);
  text-align: center;
}

.trusted-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

.trusted-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 3rem;
  opacity: 0.6;
}

.trusted-logos svg {
  height: 32px;
  fill: currentColor;
}

/* Features Grid */
.features {
  padding: 8rem 0;
  background-color: var(--bg-color);
}

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

.feature-card {
  background-color: var(--surface-color);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

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

/* How It Works (Steps) */
.steps-section {
  padding: 8rem 0;
  background-color: var(--surface-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  position: relative;
}

.step-card {
  text-align: center;
  position: relative;
  z-index: 2;
}

.step-number {
  width: 4rem;
  height: 4rem;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.step-card p {
  color: var(--text-secondary);
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 2rem;
  left: 10%;
  right: 10%;
  height: 2px;
  background-color: var(--border-color);
  z-index: 1;
}

/* Comparison Table */
.comparison-section {
  padding: 8rem 0;
  background-color: var(--bg-color);
}

.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, 
.comparison-table td {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background-color: var(--surface-hover);
  font-weight: 600;
  font-size: 1.125rem;
}

.comparison-table th:first-child {
  width: 40%;
}

.comparison-table td:not(:first-child),
.comparison-table th:not(:first-child) {
  text-align: center;
}

.comparison-table .highlight-col {
  background-color: var(--primary-light);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.check-icon { color: var(--success-color); }
.cross-icon { color: var(--danger-color); }

/* Statistics */
.statistics {
  padding: 6rem 0;
  background-color: var(--primary-color);
  color: white;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
}

.stat-number {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.stat-label {
  font-size: 1.125rem;
  font-weight: 500;
  opacity: 0.9;
}

/* Testimonials */
.testimonials {
  padding: 8rem 0;
  background-color: var(--surface-color);
}

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

.testimonial-card {
  background-color: var(--bg-color);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
}

.stars {
  color: var(--warning-color);
  margin-bottom: 1.5rem;
  display: flex;
  gap: 0.25rem;
}

.testimonial-text {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background-color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 1.25rem;
}

.author-info h4 {
  font-size: 1.125rem;
  margin: 0;
}

.author-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

/* FAQ */
.faq-section {
  padding: 8rem 0;
  background-color: var(--bg-color);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--surface-color);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: none;
  border: none;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: var(--surface-hover);
}

.faq-icon {
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-secondary);
  padding: 0 2rem;
}

.faq-item.active .faq-answer {
  max-height: 1000px;
  padding-bottom: 1.5rem;
}

/* CTA Section */
.cta-section {
  padding: 8rem 0;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
}

.cta-section h2 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  color: white;
}

.cta-section p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-section .btn:hover {
  background-color: var(--bg-color);
}

/* Footer */
.footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand .logo {
  margin-bottom: 1.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 300px;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  color: var(--text-secondary);
  background-color: var(--bg-color);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.social-links a:hover {
  color: white;
  background-color: var(--primary-color);
}

.footer-links h4 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--primary-color);
  padding-left: 0.25rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Tool Area */
.tool-section {
  padding: 4rem 0 8rem;
}

.tool-container {
  background-color: var(--surface-color);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.tool-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--surface-hover);
}

.tool-stats {
  display: flex;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.tool-actions {
  display: flex;
  gap: 0.75rem;
}

.text-editor-container {
  display: flex;
  min-height: 500px;
}

.text-editor {
  flex: 1;
  padding: 2rem;
  border: none;
  resize: vertical;
  background-color: transparent;
  color: var(--text-primary);
  font-family: 'Inter', inherit;
  font-size: 1.125rem;
  line-height: 1.7;
  outline: none;
  min-height: 500px;
}

.text-editor::placeholder {
  color: var(--text-muted);
}

.analysis-panel {
  width: 400px;
  border-left: 1px solid var(--border-color);
  background-color: var(--surface-color);
  padding: 2rem;
  display: none;
  flex-direction: column;
  gap: 2rem;
}

.analysis-panel.active {
  display: flex;
}

.score-circle {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--danger-color) var(--percentage, 0%), var(--success-color) 0);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.score-circle::before {
  content: "";
  position: absolute;
  inset: 12px;
  background-color: var(--surface-color);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.score-value {
  position: relative;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--danger-color);
  line-height: 1;
}

.score-label {
  position: relative;
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 0.25rem;
}

.progress-bar-container {
  margin-bottom: 1.5rem;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.progress-track {
  height: 10px;
  background-color: var(--border-color);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-fill.duplicate { background-color: var(--danger-color); width: 0%; }
.progress-fill.original { background-color: var(--success-color); width: 0%; }

.tool-footer {
  padding: 1.25rem 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--surface-hover);
}

.demo-notice {
  font-size: 0.875rem;
  color: var(--warning-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  background-color: var(--primary-light);
  color: var(--primary-color);
}

/* Blog */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2.5rem;
}

.blog-card {
  background-color: var(--surface-color);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.blog-img {
  width: 100%;
  height: 220px;
  background-color: var(--border-color);
  object-fit: cover;
}

.blog-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-date {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: block;
  font-weight: 500;
}

.blog-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.blog-excerpt {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex: 1;
}

.read-more {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 0.9375rem;
}

/* Single Blog Post */
.article-wrapper {
  max-width: 1000px;
  margin: 0 auto;
}

.article-header {
  text-align: center;
  margin-bottom: 3rem;
}

.article-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1.5rem;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.meta-separator {
  color: var(--border-color);
}

.author-info-sm {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.author-avatar-sm {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

.article-featured-image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  margin-bottom: 4rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.article-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 4rem;
}

.sticky-sidebar {
  position: sticky;
  top: 6rem;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.toc-nav a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.toc-nav a:hover {
  color: var(--primary-color);
}

.sidebar-cta {
  background-color: var(--surface-hover);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.sidebar-cta h4 {
  margin-bottom: 0.5rem;
}

.sidebar-cta p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.article-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 2rem;
  margin: 3rem 0 1.5rem;
}

.article-content h3 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
}

.article-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-faq {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
}

.faq-card {
  background-color: var(--surface-hover);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.faq-card h4 {
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.faq-card p {
  margin-bottom: 0;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

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

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: var(--surface-color);
}

textarea.form-control {
  resize: vertical;
  min-height: 150px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  margin-top: 4rem;
}

/* Utilities */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.font-medium { font-weight: 500; }
.w-full { width: 100%; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-16 { margin-bottom: 4rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }

/* Scroll to top */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 99;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-3px);
  background-color: var(--primary-hover);
}

/* Loading animation */
.loader-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loader {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 6rem 0;
  }
  
  .hero-content {
    margin: 0 auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .article-layout {
    grid-template-columns: 1fr;
  }
  
  .sticky-sidebar {
    position: static;
    margin-bottom: 3rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background-color: var(--surface-color);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-grid::before {
    display: none;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .text-editor-container {
    flex-direction: column;
  }

  .analysis-panel {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
  
  .tool-stats {
    display: none;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .footer-brand p {
    margin: 0 auto 1.5rem;
  }
}


/* Use Cases */
@media (max-width: 768px) {
    .use-case-row {
        grid-template-columns: 1fr !important;
        gap: 2rem !important;
        margin-bottom: 4rem !important;
    }
    .use-case-image {
        order: -1 !important;
    }
}
.newsletter-form {
    flex-direction: row;
}
@media (max-width: 480px) {
    .newsletter-form {
        flex-direction: column !important;
    }
}