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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #000;
  color: #fff;
  line-height: 1.6;
  padding: 60px 20px;
}

header {
  max-width: 1200px;
  margin: 0 auto 80px;
  text-align: center;
}

header h1 {
  font-size: 56px;
  margin-bottom: 12px;
  font-weight: 700;
  letter-spacing: -1px;
}

header p {
  font-size: 20px;
  color: #999;
}

main {
  max-width: 1200px;
  margin: 0 auto;
}

.experiments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.experiment-card {
  background: #0a0a0a;
  border-radius: 16px;
  overflow: hidden;
  text-decoration: none;
  color: #fff;
  transition: all 0.3s ease;
  border: 1px solid #1a1a1a;
}

.experiment-card:hover {
  transform: translateY(-8px);
  border-color: #333;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.experiment-image {
  width: 100%;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.emoji {
  font-size: 72px;
}

.gradient-1 {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.gradient-2 {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.gradient-3 {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.gradient-4 {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.experiment-card h2 {
  padding: 24px 24px 8px;
  font-size: 26px;
  font-weight: 600;
}

.experiment-card p {
  padding: 0 24px 24px;
  color: #999;
  font-size: 15px;
  line-height: 1.5;
}

footer {
  max-width: 1200px;
  margin: 100px auto 0;
  text-align: center;
  color: #666;
  font-size: 14px;
}

footer a {
  color: #999;
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover {
  color: #fff;
}

.tagline {
  margin-top: 8px;
  color: #444;
}

/* Mobile */
@media (max-width: 768px) {
  body {
    padding: 40px 16px;
  }

  header h1 {
    font-size: 40px;
  }

  header p {
    font-size: 18px;
  }
  
  .experiments-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .experiment-image {
    height: 180px;
  }

  .emoji {
    font-size: 56px;
  }
}