:root {
  --bg-color: #f5f5f7;
  --text-color: #1d1d1f;
  --hero-bg: #0b0f2a;
  --accent: #007aff;
  --card-bg: #ffffff;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
}

/* HERO SECTION */
.hero {
  position: relative;
  background: var(--hero-bg);
  background: radial-gradient(circle at bottom, #1b2755 0%, #0b0f2a 100%);
  color: white;
  padding: 160px 20px 120px;
  text-align: center;
  overflow: hidden;
}

/* STARS BACKGROUND */
@keyframes twinkling {
  from { opacity: 0.3; }
  to { opacity: 1; }
}

.stars, .stars2, .stars3 {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.stars {
  background: transparent url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MDAiIGhlaWdodD0iNDAwIj48Y2lyY2xlIGN4PSI1MCIgY3k9IjUwIiByPSIxIiBmaWxsPSIjZmZmIiBvcGFjaXR5PSIwLjgiLz48Y2lyY2xlIGN4PSIyNTAiIGN5PSIxNTAiIHI9IjAuNSIgZmlsbD0iI2ZmZiIgb3BhY2l0eT0iMC42Ii8+PGNpcmNsZSBjeD0iMTUwIiBjeT0iMzUwIiByPSIxIiBmaWxsPSIjZmZmIiBvcGFjaXR5PSIwLjciLz48Y2lyY2xlIGN4PSIzNTAiIGN5PSI1MCIgcj0iMSIgZmlsbD0iI2ZmZiIgb3BhY2l0eT0iMC41Ii8+PC9zdmc+') repeat;
  animation: twinkling 3s infinite alternate;
}

.stars2 {
  background: transparent url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI1MDAiIGhlaWdodD0iNTAwIj48Y2lyY2xlIGN4PSIxMjAiIGN5PSIyMjAiIHI9IjEiIGZpbGw9IiNmZmYiIG9wYWNpdHk9IjAuNiIvPjxjaXJjbGUgY3g9IjM4MCIgY3k9Ijg1IiByPSIxLjUiIGZpbGw9IiNmZmYiIG9wYWNpdHk9IjAuOSIvPjxjaXJjbGUgY3g9IjI1MCIgY3k9IjQyMCIgcj0iMC44IiBmaWxsPSIjZmZmIiBvcGFjaXR5PSIwLjUiLz48L3N2Zz4=') repeat;
  animation: twinkling 4s infinite alternate-reverse;
}

.stars3 {
  background: transparent url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MDAiIGhlaWdodD0iNjAwIj48Y2lyY2xlIGN4PSIzMDAiIGN5PSI1MCIgcj0iMiIgZmlsbD0iI2ZmZiIgb3BhY2l0eT0iMSIvPjxjaXJjbGUgY3g9IjE1MCIgY3k9IjM1MCIgcj0iMSIgZmlsbD0iI2ZmZiIgb3BhY2l0eT0iMC40Ii8+PGNpcmNsZSBjeD0iNDUwIiBjeT0iNDUwIiByPSIxIiBmaWxsPSIjZmZmIiBvcGFjaXR5PSIwLjciLz48L3N2Zz4=') repeat;
  animation: twinkling 5s infinite alternate;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 800px;
  margin: auto;
}

.hero h1 {
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 10px;
  margin-top: 0;
}

.hero .highlight {
  background: linear-gradient(90deg, #007aff, #34c759);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .subtitle {
  font-size: 24px;
  font-weight: 500;
  color: #a1a1a6;
  margin-bottom: 30px;
  margin-top: 0;
}

.hero .description {
  font-size: 20px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 40px;
}

.cta-button {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 16px 32px;
  border-radius: 30px;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 122, 255, 0.5);
  background: #006ae6;
}

/* ABOUT SECTION */
.about {
  padding: 100px 20px 60px;
  text-align: center;
  max-width: 800px;
  margin: auto;
}

.about h2, .features h2, .team h2 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 30px;
}

.about p {
  font-size: 20px;
  line-height: 1.6;
  color: #515154;
}

/* FEATURES SECTION */
.features {
  padding: 80px 20px;
  text-align: center;
  max-width: 1100px;
  margin: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.feature-card {
  background: var(--card-bg);
  border-radius: 24px;
  padding: 40px 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  text-align: left;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(0, 122, 255, 0.1);
  color: var(--accent);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
}

.feature-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
  margin-top: 0;
}

.feature-card p {
  font-size: 16px;
  color: #515154;
  line-height: 1.5;
  margin: 0;
}

/* TEAM SECTION */
.team {
  padding: 80px 20px 100px;
  text-align: center;
}

.team-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  max-width: 1100px;
  margin: auto;
}

.card {
  background: var(--card-bg);
  border-radius: 24px;
  padding: 40px 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent, #007aff);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card:hover::before {
  opacity: 1;
}

.card:hover .avatar {
  transform: scale(1.05);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--accent, #1d1d1f);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1px;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
}

.card h3 {
  font-size: 22px;
  margin-bottom: 8px;
  margin-top: 0;
}

.card p {
  font-size: 16px;
  color: #86868b;
  margin: 0;
  line-height: 1.4;
}

/* FOOTER */
footer {
  background: #111111;
  color: white;
  text-align: center;
  padding: 60px 20px;
  margin-top: 40px;
}

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

.footer-logo {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

footer p {
  color: #86868b;
  margin: 8px 0;
}

footer strong {
  color: white;
}

.copyright {
  margin-top: 24px;
  font-size: 14px;
  opacity: 0.6;
}

/* MOBILE RESPONSIVENESS */
@media (max-width: 768px) {
  .hero {
    padding: 120px 20px 80px;
  }
  
  .hero h1 {
    font-size: 42px;
  }
  
  .hero .subtitle {
    font-size: 18px;
    margin-bottom: 20px;
  }
  
  .hero .description {
    font-size: 16px;
  }

  .about h2, .features h2, .team h2 {
    font-size: 32px;
  }

  .about {
    padding: 80px 20px 40px;
  }

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

  .card {
    padding: 30px 20px;
  }
}