@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

:root {
  --background-color: #f0f2f5;
  --text-color: #333333;
  --accent-color: #007bff;
  --container-color: #ffffff;
}

body.dark-mode {
  --background-color: #1a1a1a;
  --text-color: #ffffff;
  --accent-color: #4ecca3;
  --container-color: #2e2e2e;
}

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

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-image: radial-gradient(circle, #333 1px, transparent 1px);
  background-size: 20px 20px;
}

.container {
  background-color: var(--container-color);
  padding: 40px;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  width: 90%;
  max-width: 500px;
}

h1 {
  margin-bottom: 30px;
  font-size: 2.5rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
}

#theme-toggle-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
  padding: 8px 12px;
  font-size: 0.9rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

#theme-toggle-btn:hover {
  background-color: var(--accent-color);
  color: var(--container-color);
}

.lotto-numbers {
  display: flex;
  justify-content: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.8rem;
  font-weight: 600;
  margin: 0 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transform: scale(0);
  animation: popIn 0.5s ease-out forwards;
}

#generate-btn {
  background-color: var(--accent-color);
  color: var(--background-color);
  border: none;
  padding: 15px 40px;
  font-size: 1.2rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  box-shadow: 0 4px 15px rgba(78, 204, 163, 0.3);
  text-transform: uppercase;
  letter-spacing: 1px;
}

#generate-btn:hover {
  background-color: #3abf90;
  transform: translateY(-2px);
}

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

@keyframes popIn {
  from {
    transform: scale(0);
  }
  to {
    transform: scale(1);
  }
}

@media (max-width: 600px) {
  .container {
    padding: 30px;
  }

  h1 {
    font-size: 2rem;
  }

  .number {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    margin: 5px;
  }

  #generate-btn {
    padding: 12px 30px;
    font-size: 1rem;
  }
}