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

html,
body {
  height: 100%;
  overflow: hidden;
  background: #f0ede8;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #1a1a1a;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  padding: 2rem 2.5rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #1a1a1a;
  text-decoration: none;
}

.logo-icon {
  width: 1.4rem;
  height: 1.4rem;
}

#cloud {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.content {
  position: fixed;
  bottom: 3.5rem;
  left: 4.5rem;
  z-index: 5;
  pointer-events: none;
  width: 800px;
}

.headline {
  font-size: clamp(1.5rem, 2.2vw, 1.85rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.35;
  color: #2a2a2a;
}

#simulation {
  transition: font-weight 0.4s, opacity 0.3s;
}

#simulation.active {
  font-weight: 600;
  background: linear-gradient(90deg, #1e40af, #0891b2, #16a34a, #eab308, #dc2626);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

#industry {
  transition: color 0.4s, opacity 0.3s;
}

.subtitle {
  margin-top: 1.4rem;
  margin-left: 0;
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
  font-weight: 400;
  color: #666;
  line-height: 1.7;
  max-width: none;
}

#kernel-highlight {
  transition: color 0.4s, font-weight 0.4s;
}

#kernel-highlight.active {
  color: #c0440e;
  font-weight: 500;
}

#massive-scale {
  transition: color 0.5s, font-weight 0.4s;
}

#massive-scale.active {
  color: #dc2626;
  font-weight: 600;
}

.cta {
  display: inline-block;
  margin-top: 1.1rem;
  margin-left: 0;
  padding: 0.5rem 1.2rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: #2a2a2a;
  text-decoration: none;
  border: 1px solid #ccc;
  border-radius: 100px;
  pointer-events: auto;
  transition: border-color 0.2s, background 0.2s;
}

.cta:hover {
  border-color: #2a2a2a;
  background: rgba(0, 0, 0, 0.03);
}

@media (max-width: 640px) {
  .nav {
    padding: 1.5rem 1.5rem;
  }

  .content {
    left: 1.5rem;
    bottom: 2rem;
    width: 90%;
  }

  .subtitle {
    margin-left: 3rem;
  }
}