/* Modern Reset & Variables */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0A66C2;
  --primary-hover: #004182;
  --secondary: #f3f4f6;
  --accent: #667eea;
  --text: #1c1d1f;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px 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);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
}

.logo svg {
  color: var(--accent);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Hero Section */
.hero {
  padding: 6rem 2rem 4rem;
  text-align: center;
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: var(--secondary);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.badge svg {
  color: #10b981;
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.hero-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Demo Preview */
.demo-preview {
  margin-top: 4rem;
  padding: 2rem;
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  border-radius: var(--radius);
}

.demo-window {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

.demo-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: #f9fafb;
  border-bottom: 1px solid var(--border);
}

.demo-dots {
  display: flex;
  gap: 0.5rem;
}

.demo-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #d1d5db;
}

.demo-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.demo-content {
  padding: 2rem;
}

.demo-post-header {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.demo-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
}

.demo-post-info {
  flex: 1;
}

.demo-name {
  width: 120px;
  height: 16px;
  background: #e5e7eb;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.demo-time {
  width: 80px;
  height: 12px;
  background: #f3f4f6;
  border-radius: 4px;
}

.demo-post-body {
  margin-bottom: 1rem;
}

.demo-line {
  height: 14px;
  background: #f3f4f6;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.demo-line.short {
  width: 60%;
}

.demo-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.demo-tag {
  padding: 0.25rem 0.75rem;
  background: #eff6ff;
  color: var(--primary);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

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

/* Features Section */
.features {
  padding: 6rem 2rem;
  background: #fafafa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 4rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.feature-card {
  position: relative;
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

.feature-number {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--secondary);
  border-radius: 50%;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border-radius: var(--radius);
  color: var(--primary);
  margin-bottom: 1.5rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Features List */
.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.features-list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  font-size: 0.9375rem;
  color: var(--text);
}

.features-list-item svg {
  color: #10b981;
  flex-shrink: 0;
}

/* Pricing Section */
.pricing {
  padding: 6rem 2rem;
  background: white;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition: all 0.3s;
}

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

.pricing-featured {
  border-color: var(--accent);
  background: linear-gradient(135deg, #fafafa 0%, #ffffff 100%);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.375rem 1rem;
  background: var(--accent);
  color: white;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pricing-header {
  margin-bottom: 2rem;
}

.pricing-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
}

.price-period {
  color: var(--text-secondary);
  font-size: 1rem;
}

.pricing-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  color: var(--text);
}

.pricing-features li svg {
  color: #10b981;
  flex-shrink: 0;
}

.pricing-features li.featured {
  font-weight: 600;
  color: var(--accent);
}

.pricing-features li.featured svg {
  color: var(--accent);
}

/* Footer */
.footer {
  padding: 3rem 2rem;
  background: #fafafa;
  border-top: 1px solid var(--border);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

  .hero-subtitle {
    font-size: 1.125rem;
  }

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

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

  .footer-content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}