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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: #0b0b14;
  color: #e2e2e8;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(11, 11, 20, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo {
  width: 28px;
  height: 28px;
}

.nav-title {
  font-weight: 700;
  font-size: 16px;
  color: #f0f0f5;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  color: #9d9daf;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #f0f0f5;
}

main {
  padding-top: 60px;
}

.hero {
  padding: 120px 24px 80px;
  text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
  color: #f0f0f5;
}

.hero-accent {
  color: #9d9daf;
  font-weight: 400;
}

.hero-subtitle {
  font-size: 18px;
  color: #9d9daf;
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #6366f1;
  color: #fff;
}

.btn-primary:hover {
  background: #5558e6;
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: #e2e2e8;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-large {
  padding: 16px 40px;
  font-size: 17px;
}

.section {
  padding: 80px 24px;
}

.section-dark {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  color: #f0f0f5;
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  color: #9d9daf;
  text-align: center;
  max-width: 600px;
  margin: 0 auto 48px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 28px;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: #f0f0f5;
}

.card p {
  font-size: 14px;
  color: #9d9daf;
  line-height: 1.6;
}

.card-highlight {
  border-color: rgba(99, 102, 241, 0.25);
  background: rgba(99, 102, 241, 0.04);
}

.card-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  margin-bottom: 14px;
}

.card-features {
  list-style: none;
  margin-top: 14px;
}

.card-features li {
  font-size: 13px;
  color: #9d9daf;
  padding: 4px 0;
  padding-left: 18px;
  position: relative;
}

.card-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #6366f1;
  opacity: 0.6;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.tool-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 20px;
  transition: border-color 0.2s;
}

.tool-item:hover {
  border-color: rgba(99, 102, 241, 0.25);
}

.tool-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: #f0f0f5;
  margin-bottom: 6px;
}

.tool-item p {
  font-size: 13px;
  color: #9d9daf;
  line-height: 1.5;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}

.pricing-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 32px;
  display: flex;
  flex-direction: column;
}

.pricing-card-featured {
  border-color: rgba(99, 102, 241, 0.35);
  background: rgba(99, 102, 241, 0.04);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: #6366f1;
  color: #fff;
}

.pricing-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #f0f0f5;
  margin-bottom: 12px;
}

.price {
  font-size: 40px;
  font-weight: 800;
  color: #f0f0f5;
  margin-bottom: 24px;
}

.price span {
  font-size: 16px;
  font-weight: 400;
  color: #9d9daf;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 28px;
  flex: 1;
}

.pricing-card ul li {
  font-size: 14px;
  color: #9d9daf;
  padding: 6px 0;
  padding-left: 22px;
  position: relative;
}

.pricing-card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #6366f1;
  opacity: 0.6;
}

.pricing-card .btn {
  width: 100%;
  justify-content: center;
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
}

.faq-item summary {
  font-size: 16px;
  font-weight: 600;
  color: #f0f0f5;
  cursor: pointer;
  padding: 4px 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: #9d9daf;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  font-size: 14px;
  color: #9d9daf;
  padding-top: 14px;
  line-height: 1.7;
}

.cta-section {
  text-align: center;
  background: radial-gradient(ellipse at 50% 100%, rgba(99, 102, 241, 0.06) 0%, transparent 70%);
}

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

.cta-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #f0f0f5;
  margin-bottom: 16px;
}

.cta-text {
  font-size: 16px;
  color: #9d9daf;
  margin-bottom: 32px;
  line-height: 1.6;
}

.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 40px 24px;
  text-align: center;
}

.footer-content {
  max-width: 1120px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}

.footer-logo {
  width: 24px;
  height: 24px;
}

.footer-brand span {
  font-weight: 700;
  font-size: 15px;
  color: #f0f0f5;
}

.footer-text {
  font-size: 13px;
  color: #6b6b7d;
}

@media (max-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-title {
    font-size: 36px;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  .hero-title {
    font-size: 28px;
  }

  .section-title {
    font-size: 24px;
  }
}