body {
          font-family: 'Poppins', sans-serif;
          margin: 0; padding: 0;
          background: linear-gradient(135deg, #ffffff, #f7f7f7);
          color: #333;
      }
      
      .hero-section::after {
          content: ''; position: absolute; top: 0; left: 0;
          width: 100%; height: 100%;
          background: rgba(0, 0, 0, 0.35);
          z-index: 1;
      }
      .hero-content { position: relative; z-index: 2; }
      .hero-content h1 {
          font-size: 3rem; font-weight: 700;
          text-shadow: 0 3px 6px rgba(0,0,0,0.3);
      }
      .product-details { padding: 2rem 1rem; margin-top: -30px; }
      .product-details h2 {
          font-size: 2rem; font-weight: bold;
          margin-bottom: 15px;
      }
      .price {
          font-size: 1.5rem; color: #ff6f61;
          margin-bottom: 15px;
      }
      .description {
          font-size: 1rem;
          margin-bottom: 15px;
          line-height: 1.5;
          white-space: pre-wrap;
      }
      .size-options { margin-bottom: 20px; }
      .size-options input[type="radio"] { display: none; }
      .size-options label {
          display: inline-block; padding: 8px 16px;
          margin: 0 8px 8px 0; border: 2px solid #333;
          border-radius: 20px; cursor: pointer;
          transition: all 0.3s ease; font-size: 0.9rem;
      }
      .size-options input[type="radio"]:checked + label {
          background: #ff6f61; color: #fff; border-color: #ff6f61;
      }
      .btn-primary {
          padding: 10px 20px; border-radius: 30px;
          background: linear-gradient(135deg, #ff6f61, #ff9a9e);
          border: none; transition: all 0.3s ease;
          font-size: 1rem;
      }
      .btn-primary:hover {
          background: linear-gradient(135deg, #ff9a9e, #fad0c4);
          transform: translateY(-3px);
      }
      .btn-secondary { background: #6c757d; cursor: not-allowed; }
      .size-chart {
          margin-top: 20px; padding: 15px;
          background: #fff; border-radius: 10px;
          box-shadow: 0px 4px 15px rgba(0,0,0,0.1);
          overflow-x: auto;
      }
      .size-chart table { width: 100%; min-width: 300px; }
      @media (max-width: 768px) {
          .hero-section { min-height: 50vh; }
          .hero-content h1 { font-size: 2rem; }
      }