* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  padding: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.product-card {
  background-color: #ffffff;
  border-radius: 0.5rem;
  padding: 1.5rem;
  max-width: 300px;
  width: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.product-card__image {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 0.25rem;
  object-fit: cover;
}

.product-card__author {
  font-size: 0.875rem;
  color: #666666;
  margin: 0;
}

.product-card__title {
  font-size: 1.5rem;
  font-weight: bold;
  color: #333333;
  margin: 0;
}

.product-card__price {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
}

.product-card__price-old {
  font-size: 1rem;
  color: #999999;
  text-decoration: line-through;
}

.product-card__price-new {
  font-size: 1.25rem;
  color: #e74c3c;
  font-weight: bold;
}

.product-card__button {
  background-color: #3498db;
  color: #ffffff;
  border: none;
  border-radius: 0.375rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.3s ease;
  width: 100%;
}

.product-card__button:hover {
  background-color: #2980b9;
}

.product-card__button:focus {
  outline: 2px solid #3498db;
  outline-offset: 2px;
}


@media (max-width: 768px) {
  .product-card {
    max-width: 100%;
    width: 100%;
  }
  
  body {
    padding: 0.5rem;
  }
}