body {
  font-family: 'Segoe UI', sans-serif;
  background: #d9fdf8;
  padding: 2rem;
  color: #333;
}

.form-container {
  background: #d6d3f0;
  padding: 1.5rem;
  border-radius: 12px;
  max-width: 800px;
  margin: auto;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#appHeader {
  text-align: center;
  padding: 0.5rem 0.5rem;
  border-radius: 12px;
  background-color: #f5f7fa;
  border-bottom: 2px solid #e0e0e0;
  margin-bottom: 1rem;
}

#appHeader h1 {
  font-size: 2.5rem;
  color: #4a4a4a;
  margin-bottom: 0.5rem;
  margin-top: 0.5rem;
  font-weight: 700;
}

#appHeader p {
  font-size: 1rem;
  color: #6b6b6b;
  max-width: 600px;
  margin: 0 auto;
}

h2, h3 {
  text-align: center;
  margin-bottom: 1rem;
}

form .row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: center;
}

form label {
  flex: 1 1 150px;
  font-weight: bold;
}

form input {
  flex: 1 1 200px;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid #8dc6f2;
}

.form-buttons {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

#verTarjetas {
  background-color: #f0f0f0;
  border: 1px solid #ccc;
  padding: 8px 12px;
  cursor: pointer;
}

.saved-cards {
  margin-top: 2rem;
  max-width: 800px;
  margin: 2rem auto;
}

#cardsContainer {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  justify-content: center;
}

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

.card {
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, opacity 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.5s forwards;
  position: relative;
  line-height: 1.6;
}

.card button {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #ff6b6b;
  color: white;
  border: none;
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 0.8rem;
}

input[type="color"] {
  width: 60px;
  height: 40px;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: box-shadow 0.3s ease;
}

input[type="color"]:hover {
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}