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

      body {
        font-family: Arial, sans-serif;
        background-color: #f5f5f5;
        color: #333;
      }

      header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 9%;
        background: rgba(255, 255, 255, 0.8);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 3rem;
        z-index: 1000;
        transition: background 0.3s ease;
      }

      .logo {
        font-weight: 600;
        font-size: 1.8rem;
        color: #0b398b;
        display: flex;
        align-items: center;
      }

      .logo img {
        width: 45px;
        margin-right: 12px;
      }

      nav a {
        margin: 0 1rem;
        text-decoration: none;
        color: #0b398b;
        font-weight: 500;
        position: relative;
        transition: color 0.3s ease;
      }

      nav a::after {
        content: "";
        position: absolute;
        width: 0;
        height: 2px;
        bottom: -5px;
        left: 0;
        background-color: #ffcb47;
        transition: width 0.3s ease;
      }

      nav a:hover::after,
      nav a.active::after {
        width: 100%;
      }

      nav a:hover,
      nav a.active {
        color: #ffcb47;
      }

      /* Menu Button (hidden on desktop) */
      .menu-btn {
        display: none;
        font-size: 2rem;
        color: white;
        cursor: pointer;
      }

   /* Responsive Navbar */
    @media (max-width: 768px) {
    
     .nav-links {
          position: absolute;
          top: 90px;
          right: 0;
          background: rgba(255, 255, 255, 0.9);
          flex-direction: column;
          width:200px; 
          text-align: left;
          padding: 20px;
          display: none;
        }

        .nav-links.show {
          display: flex;
        }

        .nav-links a {
          padding: 10px 0;
          font-size: 16px;
          border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .menu-btn {
          display: block;
          position: absolute;
          right: 20px; 
          top: 20px;
          margin: 0;
        color: #0b398b;
        }

        .brand-top {
          font-size: 1.5rem; 
          left: 15px;
        }
    }
 /* Responsive Navbar for 480px */
      @media (max-width: 480px) {
        .nav-links {
          position: absolute;
          top: 70px; 
          right: 0;
          background: rgba(255, 255, 255, 0.9);
          flex-direction: column;
          width: 100%; 
          text-align: left;
          padding: 15px;
          display: none; 
        }

        .nav-links.show {
          display: flex;
        }

        .nav-links a {
          padding: 10px 0;
          font-size: 16px;
          border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .menu-btn {
          display: block;
          position: absolute;
          right: 20px; 
          top: 20px;
          margin: 0;
        color: #0b398b;
        }

        .brand-top {
          font-size: 1.5rem; 
          left: 15px;
        }
      }



      /* Header Banner */
      .header-banner {
        background: linear-gradient(135deg, #2c3e50, #34495e);
        color: white;
        padding: 120px 20px 40px;
        text-align: center;
        position: relative;
        margin-top: 50px;
      }

      .header-banner::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect width="100" height="100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="80" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
        opacity: 0.3;
        z-index: 0;
      }

      .header-banner h1,
      .header-banner p {
        position: relative;
        z-index: 1;
      }

      .header-banner h1 {
        font-size: 2.5rem;
        margin-bottom: 10px;
      }

      .nav-tabs {
        background: white;
        padding: 0 20px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        position: sticky;
        top: 0;
        z-index: 100;
      }

      .nav-tabs ul {
        list-style: none;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
      }

      .nav-tabs li {
        margin: 0 5px;
      }

      .nav-tabs a {
        display: block;
        padding: 15px 25px;
        text-decoration: none;
        color: #666;
        font-weight: 500;
        border-bottom: 3px solid transparent;
        transition: all 0.3s ease;
      }

      .nav-tabs a:hover,
      .nav-tabs a.active {
        color: #e67e22;
        border-bottom-color: #e67e22;
      }

      #select-lang {
        padding: 10px 15px;
        font-size: 16px;
        font-family: "Segoe UI", sans-serif;
        color: #ffffff;
        background-color: #1e3a8a; 
        border: 2px solid #1e40af;
        border-radius: 8px;
        outline: none;
        cursor: pointer;
        transition: all 0.3s ease;
        appearance: none;
        background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg xmlns='http://www.w3.org/2000/svg' width='292.4' height='292.4'%3E%3Cpath fill='%23ffffff' d='M287 69.4L166.6 189.8c-7.8 7.8-20.5 7.8-28.3 0L5 69.4C-2.7 61.7-2.7 48.8 5 41c7.8-7.8 20.5-7.8 28.3 0L146.3 153 258.7 41c7.8-7.8 20.5-7.8 28.3 0 7.7 7.8 7.7 20.6 0 28.4z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 10px center;
        background-size: 12px;
        min-width: 120px;
      }

      #select-lang:hover {
        background-color: #1d4ed8;
        border-color: #2563eb;
      }

      #select-lang:focus {
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.4);
      }

      .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 20px;
      }

      .section {
        margin-bottom: 60px;
        background: white;
        border-radius: 10px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        overflow: hidden;
        transition: transform 0.3s ease;
      }

      .section:hover {
        transform: translateY(-5px);
      }
      .section-header {
        background: linear-gradient(135deg, #e67e22, #d35400);
        color: white;
        padding: 25px;
        font-size: 1.8em;
        font-weight: bold;
      }

      .section-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 30px;
        padding: 30px;
      }

      .product-image {
        width: 520px;
        height: 240px;
        background: #f8f9fa;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #666;
        font-size: 0.9em;
        /* border: 2px dashed #ddd; */
        overflow: hidden; /* Prevent overflow */
      }

      .product-image img {
        max-height: 100%;
        max-width: 100%;
        object-fit: contain;
      }

      .product-info h3 {
        color: #2c3e50;
        margin-bottom: 15px;
        font-size: 1.3em;
      }

      .product-info p {
        line-height: 1.6;
        margin-bottom: 20px;
        color: #555;
      }

      .product-variants {
        margin-top: 20px;
      }

      .product-variants h4 {
        color: #34495e;
        margin-bottom: 10px;
        font-size: 1.1em;
      }

      .variant-codes {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }

      .variant-code {
        background: #3498db;
        color: white;
        padding: 6px 12px;
        border-radius: 20px;
        font-size: 0.85em;
        font-weight: 500;
      }

      .applications {
        background: #ecf0f1;
        padding: 20px;
        border-radius: 8px;
        margin-top: 20px;
      }

      .applications h4 {
        color: #2c3e50;
        margin-bottom: 10px;
        font-size: 1.1em;
      }

      .applications ul {
        list-style: none;
        padding-left: 0;
      }

      .applications li {
        padding: 5px 0;
        color: #555;
        position: relative;
        padding-left: 20px;
      }

      .applications li::before {
        content: "✓";
        position: absolute;
        left: 0;
        color: #27ae60;
        font-weight: bold;
      }

      /* Media Queries for All Devices */
      /* 1. Phones (portrait) */
      @media screen and (max-width: 575px) {
        body {
          font-size: 14px;
        }

        header {
          flex-direction: column;
          padding: 1rem;
          height: auto;
        }

        .container {
          padding: 30px 15px;
        }

        .section-content {
          grid-template-columns: 1fr;
          gap: 20px;
          padding: 20px;
        }

        .product-image {
          width: 100%;
          height: auto;
        }

        .product-info h3 {
          font-size: 1.1em;
        }

        .variant-code {
          font-size: 0.85em;
          padding: 6px 10px;
        }
      }

      /* 2. Phones (landscape), small tablets */
      @media screen and (min-width: 576px) and (max-width: 767px) {
        body {
          font-size: 15px;
        }

        .container {
          padding: 35px 20px;
        }

        .section-content {
          grid-template-columns: 1fr;
          gap: 25px;
        }

        .product-image {
          width: 100%;
          height: 220px;
        }

        .product-info h3 {
          font-size: 1.2em;
        }
      }

      /* 3. Tablets */
      @media screen and (min-width: 768px) and (max-width: 991px) {
        body {
          font-size: 16px;
        }

        .container {
          padding: 40px 25px;
        }

        .section-content {
          grid-template-columns: 1fr 1fr;
          gap: 25px;
        }

        .product-image {
          width: 100%;
          height: 250px;
        }
      }

      /* 4. Laptops, small desktops */
      @media screen and (min-width: 992px) and (max-width: 1199px) {
        body {
          font-size: 17px;
        }

        .container {
          max-width: 960px;
          padding: 50px 30px;
        }

        .section-content {
          gap: 30px;
        }

        .product-image {
          width: 100%;
          height: 260px;
        }
      }

      /* 5. Large desktops */
      @media screen and (min-width: 1200px) and (max-width: 1599px) {
        body {
          font-size: 17.5px;
        }

        .container {
          max-width: 1200px;
          padding: 50px 35px;
        }

        .section-content {
          gap: 35px;
        }

        .product-image {
          width: 550px;
          height: 280px;
        }
      }

      /* 6. Ultra-wide screens (iMacs, 4K) */
      @media screen and (min-width: 1600px) {
        body {
          font-size: 18px;
        }

        header {
          padding: 1rem 5rem;
        }

        .container {
          max-width: 1500px;
          padding: 60px 40px;
        }

        .section-content {
          grid-template-columns: 1fr 1fr;
          gap: 40px;
        }

        .product-image {
          width: 600px;
          height: 300px;
        }

        .product-info h3 {
          font-size: 1.5em;
        }

        .product-info p,
        .applications li {
          font-size: 1.1em;
        }

        .variant-code {
          font-size: 1em;
          padding: 8px 16px;
        }
      }