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

    body {
      font-family: 'Inter', sans-serif;
      background: #fefefe;
      color: #1a2c3e;
      scroll-behavior: smooth;
    }

    /* container */
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== HEADER ========== */
    header {
      background: #ffffff;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.03);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(2px);
      border-bottom: 1px solid #eef2f8;
    }

    .navbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 0;
      flex-wrap: wrap;
    }

    .logo h2 {
      font-size: 1.7rem;
      font-weight: 800;
      background: linear-gradient(135deg, #0f2b3f, #1f8a9c);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      letter-spacing: -0.3px;
    }
    .logo span {
      font-size: 0.8rem;
      background: none;
      -webkit-background-clip: unset;
      color: #4b6b8f;
      font-weight: 500;
    }

    /* desktop navigation */
    .nav-links {
      display: flex;
      gap: 2rem;
      align-items: center;
      list-style: none;
    }
    .nav-links li a {
      text-decoration: none;
      font-weight: 500;
      color: #2c3f5c;
      transition: 0.2s;
      font-size: 0.95rem;
    }
    .nav-links li a:hover {
      color: #1f8a9c;
    }
    .login-btn {
      background: #1f6e8a;
      padding: 0.5rem 1.2rem;
      border-radius: 40px;
      color: white !important;
      transition: 0.2s;
      border: none;
    }
    .login-btn:hover {
      background: #0f5a73;
      transform: translateY(-2px);
    }

    /* mobile menu icon */
    .hamburger {
      display: none;
      font-size: 1.7rem;
      cursor: pointer;
      color: #1f6e8a;
    }

    /* ========== BANNER SLIDESHOW ========== */
    .slideshow-container {
      position: relative;
      max-width: 100%;
      margin: 2rem auto 0;
      border-radius: 32px;
      overflow: hidden;
      box-shadow: 0 20px 35px -12px rgba(0,0,0,0.1);
    }
    .slide {
      display: none;
      animation: fadeEffect 0.8s ease;
    }
    .slide.active {
      display: block;
    }
    .slide-img {
      width: 100%;
      height: 460px;
      object-fit: cover;
      background: linear-gradient(115deg, #0b2b38, #102b3a);
    }
    /* if using img vs background, we use background with overlay text */
    .slide-content {
      position: absolute;
      bottom: 20%;
      left: 8%;
      max-width: 500px;
      background: rgba(0,0,0,0.55);
      backdrop-filter: blur(12px);
      padding: 1.5rem 2rem;
      border-radius: 2rem;
      color: white;
      border-left: 5px solid #2f9eb3;
    }
    .slide-content h2 {
      font-size: 2rem;
      font-weight: 800;
    }
    .slide-content p {
      margin: 0.6rem 0;
    }
    .slide-content .btn {
      background: #2f9eb3;
      border: none;
      padding: 0.6rem 1.5rem;
      border-radius: 40px;
      color: white;
      font-weight: 600;
      display: inline-block;
      margin-top: 10px;
    }

    .prev, .next {
      cursor: pointer;
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0,0,0,0.5);
      color: white;
      font-size: 1.5rem;
      padding: 12px 18px;
      border-radius: 50px;
      transition: 0.2s;
      user-select: none;
      z-index: 10;
    }
    .prev { left: 15px; }
    .next { right: 15px; }
    .prev:hover, .next:hover { background: #1f8a9c; }
    .dots {
      text-align: center;
      position: relative;
      bottom: 30px;
      z-index: 8;
    }
    .dot {
      cursor: pointer;
      height: 12px;
      width: 12px;
      margin: 0 6px;
      background-color: #bbb;
      border-radius: 50%;
      display: inline-block;
      transition: 0.2s;
    }
    .dot.active, .dot:hover { background-color: #1f8a9c; transform: scale(1.2); }

    @keyframes fadeEffect { from {opacity: 0.4;} to {opacity: 1;} }

    /* ========== ABOUT SECTION ========== */
    .about-section {
      margin: 5rem 0;
      text-align: center;
    }
    .about-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 2rem;
      align-items: center;
      margin-top: 2rem;
    }
    .about-text {
      flex: 1;
      text-align: left;
    }
    .about-text h3 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: #0f2b3f;
    }
    .about-text p {
      color: #4b5e77;
      line-height: 1.5;
    }
    .about-stats {
      flex: 1;
      display: flex;
      gap: 1.5rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    .stat-card {
      background: white;
      padding: 1.5rem;
      border-radius: 28px;
      text-align: center;
      box-shadow: 0 8px 18px rgba(0,0,0,0.05);
      min-width: 140px;
      border: 1px solid #eef3fc;
    }
    .stat-card i {
      font-size: 2rem;
      color: #1f8a9c;
    }

    /* ========== PRODUCT SECTION (INDICATORS) ========== */
    .products-section {
      margin: 4rem 0;
    }
    .section-title {
      text-align: center;
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      color: #0f2b3f;
    }
    .product-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 2rem;
    }
    .product-card {
      background: white;
      border-radius: 28px;
      overflow: hidden;
      transition: all 0.25s;
      box-shadow: 0 12px 22px -12px rgba(0,0,0,0.08);
      border: 1px solid #ecf3fa;
    }
    .product-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 25px 35px -15px rgba(31,110,138,0.2);
      border-color: #cde2f0;
    }
    .product-img {
      background: linear-gradient(145deg, #d9eef9, #c2dfef);
      height: 180px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 4rem;
      color: #1f6e8a;
    }
    .product-info {
      padding: 1.4rem;
    }
    .product-info h4 {
      font-size: 1.3rem;
      font-weight: 700;
    }
    .product-info p {
      color: #56748c;
      margin: 0.6rem 0;
      font-size: 0.9rem;
    }
    .price {
      font-weight: 800;
      font-size: 1.3rem;
      color: #135e78;
      margin: 0.6rem 0;
    }
    .product-btn {
      background: transparent;
      border: 1.5px solid #2f9eb3;
      padding: 0.5rem 1rem;
      border-radius: 60px;
      font-weight: 600;
      color: #1f6e8a;
      cursor: pointer;
      transition: 0.2s;
    }
    .product-btn:hover {
      background: #1f6e8a;
      color: white;
    }

    /* ========== FOOTER ========== */
    footer {
      background: #0b1926;
      color: #bfd6f0;
      padding: 3rem 0 1.5rem;
      margin-top: 4rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem;
      margin-bottom: 2rem;
    }
    .footer-col h4 {
      color: white;
      margin-bottom: 1rem;
    }
    .footer-col a {
      display: block;
      color: #b7cef0;
      text-decoration: none;
      margin-bottom: 0.5rem;
      font-size: 0.9rem;
    }
    .footer-col a:hover {
      color: #7ac7e6;
    }
    .social i {
      font-size: 1.4rem;
      margin-right: 1rem;
      transition: 0.2s;
    }
    .social i:hover {
      color: #2f9eb3;
    }
    .copyright {
      text-align: center;
      border-top: 1px solid #1e334a;
      padding-top: 1.5rem;
      font-size: 0.8rem;
    }

    /* responsive */
    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 80%;
        height: calc(100vh - 70px);
        box-shadow: 4px 8px 20px rgba(0,0,0,0.1);
        padding: 2rem 1rem;
        transition: 0.3s ease;
        gap: 1.8rem;
        align-items: flex-start;
        z-index: 99;
      }
      .nav-links.active {
        left: 0;
      }
      .container {
        padding: 0 20px;
      }
      .slide-content {
        left: 5%;
        right: 5%;
        bottom: 15%;
        padding: 1rem;
      }
      .slide-content h2 {
        font-size: 1.3rem;
      }
      .slide-img {
        height: 340px;
      }
      .about-grid {
        flex-direction: column;
      }
      .about-text {
        text-align: center;
      }
    }
    @media (max-width: 480px) {
      .product-grid {
        grid-template-columns: 1fr;
      }
    }
    button {
      cursor: pointer;
    }