:root {
  --primary: #4285f4;
  --secondary: #00c6ff;
  --pink: #ff006e;
  --dark: #1a1a1a;
  --darker: #121212;
  --darkest: #0a0a0a;
  --light: #f5f5f5;
}

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

body {
  font-family: 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  background: var(--darker);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

header,
#header-placeholder {
  min-height: 110px;
  display: block;
  contain: layout style;
}

.mobile-nav-container {
  min-height: 0;
  contain: layout style;
}

@media (max-width: 780px) {
  header {
    display: none;
  }
  
  #header-placeholder {
    min-height: 140px;
  }
  
  .mobile-nav-container {
    min-height: 140px;
  }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  padding: 100px 0 150px;
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
  border-radius: 40px;
  margin: 20px;
  background: var(--darkest);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .5), 0 0 100px rgba(66, 133, 244, .1);
  contain: layout style paint;
}

.hero-content {
  max-width: 650px;
  margin: 0 auto;
  text-align: center;
  z-index: 2;
  position: relative;
  contain: layout style paint;
}

.hero h1 {
  font-family: 'Google Sans', system-ui, sans-serif;
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
  font-size-adjust: .5;
  contain: layout style paint;
  content-visibility: auto;
}

.hero h1 span {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  will-change: auto;
}

@media (max-width: 780px) {
  .hero h1 {
    font-size: 2.2rem;
    will-change: auto;
  }
  
  .hero {
    padding: 60px 0 80px;
    min-height: 85vh;
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  /* Hide particle containers initially on mobile for faster LCP */
  .sparkles-container,
  .droplets-container {
    opacity: 0;
    transition: opacity 0.5s ease-in;
  }
  
  .sparkles-container.visible,
  .droplets-container.visible {
    opacity: 1;
  }
}

.hero p {
  font-size: 1.2rem;
  margin: 0 0 30px;
  color: rgba(255, 255, 255, .8);
}

.hero-buttons {
  display: flex;
  gap: 15px;
  margin-top: 30px;
  justify-content: center;
}

.btn {
  padding: 14px 32px;
  border-radius: 30px;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 15px rgba(66, 133, 244, .3);
}

.btn-secondary {
  background: transparent;
  color: var(--light);
  border: 2px solid rgba(255, 255, 255, .2);
}

.btn i,
.feature-icon i {
  width: 1.25em;
  display: inline-block;
  text-align: center;
}

.section-title {
  text-align: center;
  margin: 0 0 60px;
}

.section-title h2 {
  font-family: 'Google Sans', system-ui, sans-serif;
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.section-title p {
  color: rgba(255, 255, 255, .7);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.features {
  padding: 100px 0;
  background: var(--darkest);
  position: relative;
  border-radius: 40px;
  margin: 30px 20px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .5), 0 0 100px rgba(66, 133, 244, .1);
  contain: layout style;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-card {
  background: rgba(20, 20, 20, .92);
  border-radius: 20px;
  padding: 30px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(66, 133, 244, .2);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  contain: layout style;
  min-height: 220px;
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 25px;
  font-size: 28px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
}

.feature-card h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
}

.feature-card p {
  color: rgba(255, 255, 255, .7);
  font-size: 1rem;
}

@media (max-width: 780px) {
  .features {
    margin: 0 10px 10px;
    border-radius: 30px;
    padding: 40px 0;
  }
  
  .section-title {
    margin: 0 0 30px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .feature-card {
    padding: 22px;
    border-radius: 18px;
    margin: 0 auto;
    max-width: 380px;
    min-height: 200px;
  }
  
  .feature-card h3 {
    font-size: 1.25rem;
  }
  
  .feature-card p {
    font-size: .98rem;
  }
}

.screenshots,
.download {
  background: var(--darkest);
  border-radius: 40px;
  margin: 30px 20px;
  padding: 80px 0;
  contain: layout style;
  content-visibility: auto;
  contain-intrinsic-size: auto 800px;
}

footer {
  margin-top: 40px;
  content-visibility: auto;
  contain-intrinsic-size: auto 400px;
}

/* Desktop-specific optimizations */
@media (min-width: 781px) {
  .hero h1 {
    /* Ensure desktop hero heading renders immediately */
    will-change: auto;
  }
  
  /* Optimize particle containers on desktop */
  .sparkles-container,
  .droplets-container {
    will-change: auto;
    contain: layout style;
  }
}