:root {
  --light-bg: #ffffff;
  --light-text: #111;
  --dark-bg: #111;
  --dark-text: #f5f5f5;
  --primary: #2a68ff;
  --card-bg-light: #f1f1f1;
  --card-bg-dark: #1a1a1a;
}

body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  background: var(--light-bg);
  color: var(--light-text);
  transition: all 0.3s ease;
}

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

.header {
  text-align: center;
  padding: 2rem;
  background: var(--primary);
  color: #fff;
}

.header button {
  background: #fff;
  color: var(--primary);
  border: none;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 10px;
  font-weight: bold;
  transition: background 0.3s ease;
}

.header button:hover {
  background: #e0e0e0;
}

.section {
  padding: 2rem;
  animation: fadeIn 1.2s ease;
}

.cards {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card {
  background: var(--card-bg-light);
  padding: 1.2rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

.dark-mode .card {
  background: var(--card-bg-dark);
}

.card:hover {
  transform: translateY(-5px);
}

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s ease;
}

.button:hover {
  background: #1d4ed8;
}

.footer {
  text-align: center;
  padding: 1rem;
  background: #222;
  color: #ccc;
}

.discount {
  text-align: center;
  color: #0c0;
  font-weight: bold;
  margin-top: 1rem;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.dark-mode a {
  color: #60a5fa;
}