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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #0a0a0a;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav-bar {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid #e5e5e5;
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: #f5f5f5;
  padding: 0.25rem;
  border-radius: 8px;
}

.nav-tab {
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: #737373;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.nav-tab:hover {
  color: #0a0a0a;
}

.nav-tab.active {
  background: #fff;
  color: #0a0a0a;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-login {
  padding: 0.5rem 1rem;
  background: transparent;
  border: none;
  font-size: 0.9375rem;
  font-weight: 500;
  color: #0a0a0a;
  cursor: pointer;
  transition: color 0.2s;
  font-family: inherit;
}

.nav-login:hover {
  color: #525252;
}

.nav-signup {
  padding: 0.625rem 1.25rem;
  background: #0a0a0a;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  font-family: inherit;
}

.nav-signup:hover {
  background: #2a2a2a;
}

/* Hero */
.hero {
  padding: 8rem 2rem 6rem;
  text-align: center;
  background: linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
}

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

.hero-title {
  font-size: 4.5rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: #525252;
  font-weight: 400;
  line-height: 1.5;
}

/* Phone Mockup Section */
.phone-showcase {
  padding: 6rem 2rem;
  background: #0a0a0a;
  overflow: hidden;
}

.phone-showcase-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  max-width: 400px;
  width: 100%;
  padding: 3rem;
  background: #1a1a1a;
  border-radius: 48px;
}

.phone-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 32px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Customer Brands */
.brands {
  padding: 5rem 2rem;
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
}

.brands-content {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.brands-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #737373;
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 3rem;
  align-items: center;
}

.brand-logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: #a3a3a3;
  letter-spacing: -0.02em;
}

/* Testimonials */
.testimonials {
  padding: 7rem 2rem;
  background: #fff;
}

.testimonials-content {
  max-width: 1400px;
  margin: 0 auto;
}

.testimonials-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 5rem;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.testimonial-card {
  padding: 2.5rem;
  background: #fafafa;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.testimonial-text {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: #0a0a0a;
}

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

.author-photo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.author-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #0a0a0a;
}

.author-role {
  font-size: 0.875rem;
  color: #737373;
}

/* Split Section */
.split-section {
  background: #fff;
}

.split-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 85vh;
}

.split-side {
  padding: 5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.split-left {
  background: #f5f3ff;
  border-right: 1px solid #e9e5ff;
}

.split-right {
  background: #fff5f3;
}

.split-content {
  max-width: 480px;
}

.split-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #737373;
  margin-bottom: 1.5rem;
}

.split-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.split-description {
  font-size: 1.125rem;
  color: #525252;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.split-features {
  list-style: none;
  margin-bottom: 3rem;
}

.split-features li {
  font-size: 1rem;
  color: #0a0a0a;
  margin-bottom: 1rem;
  padding-left: 1.75rem;
  position: relative;
}

.split-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  font-weight: 600;
}

.split-cta {
  display: inline-block;
  padding: 1rem 2rem;
  background: #0a0a0a;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1.0625rem;
  font-weight: 600;
  transition: background 0.2s;
}

.split-cta:hover {
  background: #2a2a2a;
}

/* How It Works */
.how-it-works {
  padding: 7rem 2rem;
  background: #fafafa;
}

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

.how-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 5rem;
}

.how-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4rem;
}

.how-step {
  text-align: center;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #0a0a0a;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.step-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.step-description {
  font-size: 1.0625rem;
  color: #525252;
  line-height: 1.6;
}

/* Footer CTA */
.footer-cta {
  padding: 7rem 2rem;
  background: #0a0a0a;
  color: #fff;
  text-align: center;
}

.footer-content {
  max-width: 700px;
  margin: 0 auto;
}

.footer-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.footer-subtitle {
  font-size: 1.25rem;
  color: #a3a3a3;
  margin-bottom: 2.5rem;
}

.footer-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: #fff;
  color: #0a0a0a;
  text-decoration: none;
  border-radius: 8px;
  font-size: 1.0625rem;
  font-weight: 600;
  transition: background 0.2s;
}

.footer-button:hover {
  background: #f5f5f5;
}

/* Footer */
.footer {
  padding: 3rem 2rem 1.5rem;
  background: #fff;
  border-top: 1px solid #e5e5e5;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
}

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

.footer-links a {
  color: #737373;
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #0a0a0a;
}

.starborn-footer {
  text-align: right;
  padding-right: 1rem;
}

/* Mobile Responsive */
@media (max-width: 640px) {
  .nav-bar {
    padding: 1rem 1.5rem;
  }

  .nav-right {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-tabs {
    order: 2;
  }

  .nav-auth {
    order: 1;
  }

  .hero {
    padding: 4rem 1.5rem 3rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

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

  .phone-showcase {
    padding: 3rem 1.5rem;
  }

  .phone-mockup {
    max-width: 300px;
  }

  .split-container {
    grid-template-columns: 1fr;
  }

  .split-side {
    padding: 3rem 1.5rem;
    min-height: auto;
  }

  .split-left {
    border-right: none;
    border-bottom: 1px solid #e9e5ff;
  }

  .split-title {
    font-size: 2rem;
  }

  .brands {
    padding: 3rem 1.5rem;
  }

  .brands-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .brand-logo {
    font-size: 1rem;
  }

  .testimonials {
    padding: 4rem 1.5rem;
  }

  .testimonials-title {
    font-size: 2rem;
    margin-bottom: 3rem;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .testimonial-card {
    padding: 2rem;
  }

  .how-it-works {
    padding: 4rem 1.5rem;
  }

  .how-title {
    font-size: 2rem;
    margin-bottom: 3rem;
  }

  .how-steps {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-cta {
    padding: 4rem 1.5rem;
  }

  .footer-title {
    font-size: 2rem;
  }

  .footer-subtitle {
    font-size: 1.0625rem;
  }

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

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

  .starborn-footer {
    text-align: center;
    padding-right: 0;
  }
}