* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: Inter, system-ui, sans-serif;
      background: #f8f5f7;
      color: #222;
    }

    img {
      max-width: 100%;
      display: block;
    }

    /* ===============================
       NAVBAR
    =============================== */
    header {
      width: 100%;
      background: white;
      border-bottom: 1px solid #eee;
    }

    .nav-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 24px;
      font-weight: 700;
    }

    .logo span {
      color: #e889a8;
    }

    nav a {
      margin-left: 20px;
      text-decoration: none;
      color: #444;
      font-weight: 500;
    }

    /* ===============================
       PRODUCT LAYOUT
    =============================== */
    .page {
      max-width: 1200px;
      margin: 40px auto;
      padding: 0 20px;
    }

    .product-layout {
      display: flex;
      gap: 40px;
      align-items: flex-start;
    }

    .gallery {
      flex: 1;
    }

    .gallery img {
      border-radius: 12px;
    }

    .thumbs {
      display: flex;
      gap: 10px;
      margin-top: 12px;
    }

    .thumbs img {
      width: 70px;
      height: 70px;
      object-fit: cover;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid #ddd;
    }

    .details {
      flex: 1;
    }

    h1 {
      font-size: 32px;
      margin: 0 0 10px;
    }

    .price-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 20px;
    }

    .price {
      font-size: 28px;
      font-weight: 700;
    }

    .compare {
      text-decoration: line-through;
      color: #999;
    }

    .badge {
      padding: 6px 10px;
      border-radius: 6px;
      background: #ffe9ef;
      border: 1px solid #ffbed3;
      font-size: 12px;
    }

    .desc {
      margin: 20px 0;
      line-height: 1.6;
    }

    select {
      padding: 10px;
      width: 100%;
      margin-bottom: 20px;
    }

    .buy-btn {
      width: 100%;
      padding: 16px;
      font-size: 16px;
      border: none;
      border-radius: 8px;
      background: black;
      color: white;
      cursor: pointer;
    }

    /* ===============================
       TABS
    =============================== */
    .tabs {
      margin-top: 80px;
    }

    .tab-buttons {
      display: flex;
      gap: 10px;
      margin-bottom: 20px;
      flex-wrap: wrap;
    }

    .tab-buttons button {
      padding: 10px 16px;
      border-radius: 6px;
      border: none;
      background: #eee;
      cursor: pointer;
    }

    .tab-buttons .active {
      background: #ff8fb8;
      color: white;
    }

    .tab-content {
      background: white;
      padding: 30px;
      border-radius: 12px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    }

    /* ===============================
       MOBILE
    =============================== */
    @media (max-width: 768px) {
      .product-layout {
        flex-direction: column;
      }

      nav {
        display: none; /* keep simple for now */
      }
    }