body {
  margin: 0;
  font-family: 'Inter', Arial, sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255,255,255,0.8);
  padding: 18px 48px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo {
  font-size: 2rem;
  font-weight: bold;
  color: #000;
}
.navbar nav a {
  margin: 0 18px;
  text-decoration: none;
  color: #1d1d1f;
  font-weight: 500;
  transition: color 0.2s;
}
.navbar nav a:hover {
  color: #0071e3;
}
.hero {
  text-align: center;
  padding: 120px 20px 60px 20px;
  background: linear-gradient(120deg, #e8eaf6 0%, #f5f5f7 100%);
}
.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.hero p {
  font-size: 1.5rem;
  margin-bottom: 32px;
}
.cta {
  background: #0071e3;
  color: #fff;
  padding: 14px 38px;
  border-radius: 28px;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(0,113,227,0.08);
  transition: background 0.2s;
}
.cta:hover {
  background: #005bb5;
}
.feature {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  background: #fff;
  box-shadow: 0 2px 16px rgba(0,0,0,0.03);
  margin: 40px 0;
  border-radius: 24px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
.feature img {
  max-width: 400px;
  width: 100%;
  border-radius: 18px;
  margin-right: 48px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}
.feature-text {
  max-width: 400px;
}
.feature-text h2 {
  font-size: 2rem;
  margin-bottom: 18px;
}
.feature-text p {
  font-size: 1.1rem;
  margin-bottom: 24px;
}
.cta-secondary {
  background: #f5f5f7;
  color: #0071e3;
  padding: 12px 32px;
  border-radius: 24px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid #0071e3;
  transition: background 0.2s, color 0.2s;
}
.cta-secondary:hover {
  background: #0071e3;
  color: #fff;
}
footer {
  text-align: center;
  padding: 32px 0 16px 0;
  color: #86868b;
  font-size: 0.95rem;
  background: none;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  margin-left: 24px;
  cursor: pointer;
  color: #1d1d1f;
  transition: color 0.2s;
}
#theme-toggle:hover {
  color: #0071e3;
}

body.dark {
  background: #18181a;
  color: #f5f5f7;
}
body.dark .navbar {
  background: rgba(29,29,31,0.95);
}
body.dark .logo {
  color: #fff;
}
body.dark .navbar nav a {
  color: #f5f5f7;
}
body.dark .navbar nav a:hover {
  color: #2997ff;
}
body.dark .hero {
  background: linear-gradient(120deg, #23232b 0%, #18181a 100%);
}
body.dark .cta {
  background: #2997ff;
  color: #fff;
}
body.dark .cta:hover {
  background: #0071e3;
}
body.dark .feature {
  background: #23232b;
  box-shadow: 0 2px 16px rgba(0,0,0,0.18);
}
body.dark .feature-text h2,
body.dark .feature-text p {
  color: #f5f5f7;
}
body.dark .cta-secondary {
  background: #18181a;
  color: #2997ff;
  border: 1px solid #2997ff;
}
body.dark .cta-secondary:hover {
  background: #2997ff;
  color: #fff;
}
body.dark footer {
  color: #86868b;
}

@media (max-width: 900px) {
  .feature {
    flex-direction: column;
    text-align: center;
  }
  .feature img {
    margin: 0 0 32px 0;
  }
}