@media (max-width: 1400px) {
  .container {
    max-width: 1140px;
  }
}

@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
  
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  
  .grid-4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 720px;
    padding: 0 15px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .section {
    padding: 50px 0;
  }
}

@media (max-width: 768px) {
  .container {
    max-width: 540px;
  }
  
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.2rem; }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: 40px 0;
  }
  
  .section-header {
    margin-bottom: 30px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .product-info {
    padding: 15px;
  }
  
  .product-buttons {
    flex-direction: column;
  }
}

@media (max-width: 576px) {
  .container {
    max-width: 100%;
    padding: 0 15px;
  }
  
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.3rem; }
  
  .section-header p {
    font-size: 1rem;
  }
  
  .product-price .price {
    font-size: 1.25rem;
  }
  
  .nav-container {
    padding: 10px 15px;
  }
  
  .logo {
    font-size: 1.5rem;
  }
}

@media (max-width: 400px) {
  h1 { font-size: 1.3rem; }
  
  .btn {
    width: 100%;
  }
}