body {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    min-height: 100vh;
    font-family: "Josefin Sans", sans-serif;
  }
  .builder-header {
    text-align: center;
    margin: 40px 0 28px 0;
    color: #c62828;
    letter-spacing: 1px;
    font-weight: bold;
    text-shadow: 0 2px 8px #fff, 0 1px 0 #c62828;
  }
  .builder-header h1 {
    font-size: 2.8rem;
    font-weight: bold;
    color: #c62828;
    margin-bottom: 10px;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px #fff, 0 1px 0 #c62828;
  }
  .builder-header p {
    color: #222;
    font-size: 1.2rem;
    margin-bottom: 0;
    font-weight: 500;
  }
  .builder-main-flex {
    display: flex;
    gap: 40px;
    justify-content: center;
    align-items: flex-start;
    margin-bottom: 40px;
    flex-wrap: wrap;
  }
  .builder-products-list {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(198,40,40,0.10), 0 1.5px 8px #c6282822;
    padding: 28px 22px 22px 22px;
    min-width: 340px;
    max-width: 440px;
    width: 100%;
    min-height: 420px;
    margin-bottom: 18px;
    border: 2px solid #c62828;
    transition: box-shadow 0.2s;
  }
  .builder-products-list input[type="text"] {
    border-radius: 8px;
    border: 1.5px solid #c62828;
    font-size: 1.08em;
    padding: 8px 12px;
    margin-bottom: 10px;
    outline: none;
    transition: border 0.2s;
  }
  .builder-products-list input[type="text"]:focus {
    border: 2px solid #c62828;
    box-shadow: 0 0 0 2px #c6282822;
  }
  .builder-product-select-card {
    border: 1.5px solid #eee;
    border-radius: 12px;
    padding: 16px 18px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 18px;
    background: #fafbfc;
    cursor: pointer;
    transition: border 0.2s, box-shadow 0.2s, background 0.2s;
    box-shadow: 0 2px 8px rgba(198,40,40,0.04);
    position: relative;
  }
  .builder-product-select-card.selected {
    border: 2.5px solid #c62828;
    background: #fff3f3;
    box-shadow: 0 4px 16px #c6282822;
  }
  .builder-product-select-card:hover {
    border: 2px solid #c62828;
    background: #fff6f6;
    box-shadow: 0 4px 16px #c6282822;
  }
  .builder-product-photo {
    width: 68px;
    height: 68px;
    object-fit: cover;
    border-radius: 10px;
    background: #f0f0f0;
    border: 1.5px solid #c62828;
    box-shadow: 0 2px 8px #c6282822;
  }
  .builder-product-title {
    font-weight: 600;
    color: #c62828;
    font-size: 1.12em;
    margin-bottom: 2px;
    letter-spacing: 0.5px;
  }
  .builder-product-price {
    color: #222;
    font-weight: bold;
    font-size: 1.08em;
    margin-bottom: 2px;
  }
  .builder-step-panel {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(198,40,40,0.10), 0 1.5px 8px #c6282822;
    padding: 32px 24px 24px 24px;
    min-width: 340px;
    max-width: 370px;
    width: 100%;
    min-height: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 2px solid #c62828;
    transition: box-shadow 0.2s;
  }
  .builder-step-panel .builder-step-label {
    font-size: 1.35em;
    font-weight: bold;
    margin-bottom: 14px;
    text-align: center;
    color: #c62828;
    letter-spacing: 1px;
  }
  .builder-step-panel .builder-step-icon {
    font-size: 2.8em;
    margin-bottom: 12px;
    color: #c62828;
    filter: drop-shadow(0 2px 2px #fff);
  }
  .builder-step-panel .builder-selected-product {
    margin: 22px 0;
    text-align: center;
    min-height: 120px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .builder-step-panel .builder-selected-product img {
    width: 90px;
    height: 90px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 10px;
    border: 2px solid #c62828;
    background: #fff;
    box-shadow: 0 2px 8px #c6282822;
  }
  .builder-step-panel .btn-next-step {
    margin-top: auto;
    width: 100%;
    background: #c62828;
    color: #fff;
    font-weight: bold;
    border-radius: 8px;
    border: none;
    font-size: 1.1em;
    padding: 12px 0;
    transition: background 0.2s, color 0.2s;
    box-shadow: 0 2px 8px #c6282822;
  }
  .builder-step-panel .btn-next-step:disabled {
    background: #eee;
    color: #aaa;
    border: none;
    cursor: not-allowed;
  }
  .builder-step-panel .btn-next-step:not(:disabled):hover {
    background: #a91d1d;
    color: #fff;
  }
  .builder-step-panel .btn-outline-danger {
    border: 1.5px solid #c62828;
    color: #c62828;
    background: #fff;
    border-radius: 6px;
    font-weight: bold;
    margin-top: 8px;
    transition: background 0.2s, color 0.2s;
  }
  .builder-step-panel .btn-outline-danger:hover {
    background: #c62828;
    color: #fff;
  }
  .builder-summary {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(198,40,40,0.10), 0 1.5px 8px #c6282822;
    border: 2px solid #c62828;
    padding: 36px 32px 32px 32px;
    max-width: 600px;
    margin: 40px auto 32px auto;
    text-align: center;
    color: #222;
  }
  .builder-summary h4 {
    color: #c62828;
    font-size: 2em;
    font-weight: bold;
    margin-bottom: 18px;
    letter-spacing: 1px;
  }
  .builder-summary-list {
    list-style: none;
    padding: 0;
    margin: 0 0 18px 0;
    font-size: 1.1em;
  }
  .builder-summary-list li {
    margin-bottom: 10px;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
    color: #222;
  }
  .builder-summary-list li:last-child {
    border-bottom: none;
  }
  #builderTotal {
    color: #c62828;
    font-size: 1.25em;
    font-weight: bold;
    margin-top: 10px;
    margin-bottom: 10px;
    letter-spacing: 1px;
  }
  #builderAddToCartBtn {
    background: #c62828;
    color: #fff;
    font-weight: bold;
    border-radius: 8px;
    border: none;
    font-size: 1.1em;
    padding: 14px 0;
    width: 100%;
    box-shadow: 0 2px 8px #c6282822;
    transition: background 0.2s, color 0.2s;
  }
  #builderAddToCartBtn:hover {
    background: #a91d1d;
    color: #fff;
  }
  /* Modal styling */
  .builder-modal .modal-content {
    border-radius: 16px;
    border: 2px solid #c62828;
    box-shadow: 0 4px 24px #c6282822;
  }
  .builder-modal .modal-header {
    background: #fff3f3;
    border-bottom: 1.5px solid #c62828;
    color: #c62828;
    font-weight: bold;
    font-size: 1.2em;
  }
  .builder-modal .modal-title {
    color: #c62828;
    font-weight: bold;
    letter-spacing: 1px;
  }
  .builder-modal .btn-close {
    filter: invert(30%) sepia(100%) saturate(500%) hue-rotate(-10deg) brightness(1.2);
  }
  /* Responsive */
  @media (max-width: 900px) {
    .builder-main-flex {
      flex-direction: column;
      align-items: center;
      gap: 22px;
    }
    .builder-products-list, .builder-step-panel {
      min-width: unset;
      max-width: 98vw;
      padding: 18px 6vw;
    }
    .builder-summary {
      padding: 24px 4vw;
      max-width: 98vw;
    }
  }
  @media (max-width: 600px) {
    .builder-header h1 {
      font-size: 2em;
    }
    .builder-summary h4 {
      font-size: 1.3em;
    }
  }