body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f4f7f9, #dce6ec);
  font-family: Arial, sans-serif;
  box-sizing: border-box;
  padding: clamp(10px, 4vw, 40px);
}

.grid {
  width: 100%;
  max-width: 1100px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(10px, 2.5vw, 30px);
}

button {
  width: 100%;
  aspect-ratio: 2 / 1;
  font-size: clamp(16px, 3.5vw, 45px);
  font-weight: bold;
  color: white;
  border: none;
  border-radius: clamp(10px, 2vw, 20px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: 0.2s;
  padding: 0 clamp(6px, 2vw, 20px);
}

button:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

.rot {
  background-color: #d62828;
}

.gruen {
  background-color: #218739;
}

.zurueck {
  grid-column: 1 / -1;
  aspect-ratio: auto;
  height: clamp(60px, 8vw, 100px);
  background-color: #555555;
}

@media (max-width: 500px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .zurueck {
    grid-column: 1;
  }
}