:root {
  --bg-dark: #0f0f10;
  --text-dark: #f2f2f2;
  --card-dark: #1a1a1d;
  --bg-light: #fafafa;
  --text-light: #222;
  --card-light: #ffffff;
  --accent: #4a90e2;
  --radius: 12px;
  --transition: 0.3s;
  font-family: 'Poppins', sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-dark);
  color: var(--text-dark);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

body.light {
  background: var(--bg-light);
  color: var(--text-light);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.2rem;
  font-weight: 600;
}

header h1 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 1px;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition);
  color: inherit;
}

.back {
  text-decoration: none;
  font-size: 1.2rem;
  color: var(--accent);
}

main.center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.choice {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding: 1.5rem;
}

.card {
  background: var(--card-dark);
  color: var(--text-dark);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-align: center;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

.card:hover {
  transform: scale(1.03);
  background: var(--accent);
  color: #fff;
}

body.light .card {
  background: var(--card-light);
  color: var(--text-light);
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 0.8rem;
  font-size: 0.85rem;
  opacity: 0.7;
}

@media (max-width: 600px) {
  .choice {
    flex-direction: column;
    width: 90%;
  }

  .card {
    font-size: 1rem;
    padding: 1.2rem;
  }

  header h1 {
    font-size: 1rem;
  }
  
.price {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem 0;
}

ul li {
  font-size: 0.9rem;
  opacity: 0.8;
  line-height: 1.4;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.btn:hover {
  opacity: 0.9;
  transform: scale(1.05);
}

.add-more {
  opacity: 0.7;
  text-align: center;
  font-style: italic;
 }
}