:root {
  --bg-light: #f4f6f8;
  --text-light: #1f2937;
  --bg-dark: #121212;
  --text-dark: #f3f4f6;
  --primary: #6366f1;
  --danger: #ef4444;
}

@media (max-width: 480px) {
  .credit-pack {
    margin: 20px;
    padding: 20px;
  }

  .credit-pack h2 {
    font-size: 1.4rem;
  }

  .credit-pack .price {
    font-size: 1.2rem;
  }
}

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

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

.container {
  max-width: 500px;
  margin: 50px auto;
  padding: 1.5rem;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

body.dark .container {
  background: #1e1e1e;
}

h2 {
  text-align: center;
  color: var(--primary);
}

form input,
form button {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 12px;
  font-size: 16px;
  border-radius: 6px;
  border: 1px solid #d1d5db;
}

form input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

button {
  background-color: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  padding: 12px;
  border-radius: 8px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #4f46e5;
}

a {
  display: block;
  text-align: center;
  margin-top: 10px;
  text-decoration: none;
  color: var(--primary);
}

.toggle-theme {
  position: fixed;
  top: 10px;
  right: 10px;
  background: none;
  color: inherit;
  border: 2px solid currentColor;
  padding: 5px 10px;
  cursor: pointer;
  border-radius: 6px;
}

.pack-selector {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 40px auto;
  padding: 24px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
  max-width: 320px;
  transition: background 0.3s ease;
}

body.dark .pack-selector {
  background: #1f2937;
  border: 1px solid #374151;
}

.pack-selector p {
  font-size: 1.1rem;
  color: inherit;
  margin-bottom: 10px;
}

.pack-selector select {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background-color: #f9fafb;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

body.dark .pack-selector select {
  background-color: #111827;
  color: var(--text-dark);
  border: 1px solid #4b5563;
}

.pack-selector select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Animation pour les blocs */
.fade-in {
  animation: fadeInUp 0.6s ease-out both;
}