:root {
  --background-color: oklch(98% 0.02 240);
  --text-color: oklch(20% 0.02 240);
  --primary-color: oklch(65% 0.2 260);
  --primary-color-hover: oklch(70% 0.2 260);
  --shadow-color: oklch(20% 0.02 240 / 25%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  padding: 2rem;
  background-color: oklch(100% 0 0);
  border-radius: 1rem;
  box-shadow: 0 10px 25px -5px var(--shadow-color);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

#generate-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  font-weight: bold;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s ease-in-out, transform 0.1s ease-in-out;
  box-shadow: 0 4px 10px -2px var(--shadow-color);
}

#generate-button:hover {
  background-color: var(--primary-color-hover);
  transform: translateY(-2px);
}

#generate-button:active {
  transform: translateY(0);
}

#lotto-numbers {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.lotto-number {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
  box-shadow: 0 4px 10px -2px var(--shadow-color);
}

/* Color scheme for the lotto balls */
.lotto-number:nth-child(6n + 1) { background-color: oklch(65% 0.18 40); } /* Yellow */
.lotto-number:nth-child(6n + 2) { background-color: oklch(65% 0.22 260); } /* Blue */
.lotto-number:nth-child(6n + 3) { background-color: oklch(60% 0.25 15); } /* Red */
.lotto-number:nth-child(6n + 4) { background-color: oklch(50% 0.1 240); } /* Gray */
.lotto-number:nth-child(6n + 5) { background-color: oklch(70% 0.2 150); } /* Green */
.lotto-number:nth-child(6n + 0) { background-color: oklch(70% 0.2 300); } /* Purple */

@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }
  .lotto-number {
    width: 3rem;
    height: 3rem;
    font-size: 1.2rem;
  }
}