.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  padding: 2rem 0;
  animation: fadeIn 0.5s ease-out;
}

.card {
  background: var(--surface-color);
  border-radius: var(--card-radius);
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: all var(--transition-speed) ease;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--card-hover-shadow);
}

.card:hover::before {
  opacity: 1;
}

.card:hover .card-icon {
  color: var(--accent-color);
  transform: scale(1.1) rotate(5deg);
}

.card-content {
  padding: 2rem;
  text-align: center;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  transition: transform var(--transition-speed) ease;
}

.card h3 {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-color);
  opacity: 0.8;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  text-align: left;
}

.feature-list li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.feature-list li::before {
  content: "•";
  color: var(--primary-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.btn {
  margin-top: auto;
  padding: 0.8rem 1.8rem;
  border-radius: 25px;
  background: var(--primary-color);
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-speed) ease;
  border: none;
  cursor: pointer;
  display: inline-block;
}

.btn:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px var(--button-hover-shadow);
}