* {
    margin: 0; padding: 0; box-sizing: border-box;
  }
  html, body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0b273c, #1a4a6a);
    color: #f0f4f8;
    min-height: 100vh;
    scroll-behavior: smooth;
  }
  body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  header {
    position: sticky;
    top: 0;
    background: rgba(11, 39, 60, 0.9);
    backdrop-filter: saturate(180%) blur(10px);
    box-shadow: 0 2px 8px rgb(0 0 0 / 0.3);
    z-index: 1000;
    padding: 2rem 2.5rem 0.8rem;
    display: block;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }
  .header-up {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    min-width: 0;
    margin-bottom: 20px;
  }
  .logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    color: #f0f4f8;
    text-decoration: none;
    flex-shrink: 0;
  }
  .logo-container img {
    width: 50px;
    height: 50px;
    border-radius: 10px;
  }
  .logo-container .logo-text {
    font-weight: 800;
    font-size: 1.4rem;
    user-select: none;
    letter-spacing: 1.2px;
    white-space: nowrap;
  }
  .logo-container .logo-subtext {
    font-size: 0.7rem;
    color: #a7c1ff;
    user-select: none;
    white-space: nowrap;
  }
  .search-container {
    position: relative;
    flex-grow: 1;
    width: 80%;
  }
  .search-container input[type="search"] {
    width: 100%;
    padding: 8px 36px 8px 12px;
    border-radius: 20px;
    border: none;
    font-size: 1rem;
    background: #153753;
    color: #e0e7ff;
  }
  .search-container input[type="search"]::placeholder {
    color: #a0b8d9;
  }
  .search-container input[type="search"]:focus {
    outline: 2px solid #2a7deb;
    background: #154a8a;
    color: white;
  }
  .search-container .material-icons {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    color: #a0b8d9;
    pointer-events: none;
    user-select: none;
  }
  nav.menu {
    display: flex;
    gap: 18px;
    font-weight: 600;
    font-size: 1rem;
    align-items: center;
    flex-wrap: wrap;
  }
  nav.menu a {
    color: #f0f4f8;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  nav.menu a:hover,
  nav.menu a:focus-visible {
    background-color: #2a7deb;
    color: white;
    outline: none;
  }
  .contact-button {
    background-color: #0077ff;
    color: white;
    font-weight: 700;
    font-size: 1rem;
    padding: 10px 24px;
    border: none;
    border-radius: 24px;
    cursor: pointer;
    white-space: nowrap;
    display: flex;
    align-items: center;
    text-align: center;
    gap: 8px;
    transition: background-color 0.3s ease;
    text-decoration: none;
  }
  .contact-button:hover,
  .contact-button:focus {
    background-color: #005fcc;
    outline: none;
  }
  .contact-button .material-icons {
    font-size: 20px;
    user-select: none;
  }
  main {
    flex-grow: 1;
    max-width: 1200px;
    margin: 24px auto 48px;
    width: 100%;
    padding: 0 16px;
    display: flex;
    flex-direction: column;
    gap: 48px;
  }
  /* Slider Styles */
  .slider {
    position: relative;
    overflow: hidden;
    border-radius: 14px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    user-select: none;
    background: linear-gradient(90deg, #17375e, #3c6ea5);
  }
  .slides {
    display: flex;
    transition: transform 0.5s ease-in-out;
    will-change: transform;
  }
  .slide {
    min-width: 100%;
    padding: 40px 30px;
    box-sizing: border-box;
    color: #cfd9e9;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-radius: 14px;
  }
  .slide h2 {
    font-size: 2rem;
    margin-bottom: 12px;
    font-weight: 700;
    line-height: 1.2;
    color: #dbe9ff;
  }
  .slide p {
    font-size: 1.1rem;
    line-height: 1.5;
    max-width: 680px;
    user-select: text;
  }
  .slider-controls {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
  }
  .slider-controls button {
    background: rgba(255 255 255 / 0.7);
    border-radius: 50%;
    border: none;
    width: 14px;
    height: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
    padding: 0;
  }
  .slider-controls button[aria-current="true"] {
    background: #2a7deb;
  }
  .slider-controls button:hover {
    background: #0054cc;
  }
  /* Products Grid */
  .products-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, 1fr);
  }
  .product-card {
    background: #011a3d;
    border-radius: 14px;
    box-shadow: 0 5px 15px rgb(0 0 0 / 0.2);
    cursor: pointer;
    user-select: none;
    padding: 15px;
    flex-direction: column;
    text-decoration: none;
    color: #e0e7ff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    font-size: 0.8rem;
  }
  .product-card:focus-visible,
  .product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(3, 3, 3, 0.63);
    outline: none;
  }
  .product-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-top-left-radius: 14px;
    border-top-right-radius: 14px;
  }
  .product-info {
    padding: 6px 10px;
    font-weight: 600;
    font-size: 1.3rem;
    text-align: center;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  /* Contact Section */
  section#contact {
    background: #153753;
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
    color: #cfd9e9;
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
  }
  section#contact h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: #a5c7ff;
  }
  section#contact p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 24px;
  }
  section#contact a.contact-link {
    display: inline-block;
    background: #0077ff;
    color: white;
    font-weight: 700;
    text-decoration: none;
    padding: 14px 36px;
    border-radius: 30px;
    font-size: 1.2rem;
    transition: background 0.3s ease;
    user-select: none;
  }
  section#contact a.contact-link:hover,
  section#contact a.contact-link:focus {
    background: #004bbaff;
  }
  /* FAQ Section */
  section#faq {
    background: #102a47cc;
    border-radius: 16px;
    padding: 32px 24px;
    color: #d0d8ea;
    max-width: 900px;
    margin: 0 auto 48px;
  }
  section#faq h2 {
    font-size: 2rem;
    margin-bottom: 24px;
    text-align: center;
    color: #a5c7ff;
  }
  .faq-item {
    max-width: 900px;
    margin: 0 auto 12px auto;
    background: #1f3b63;
    border-radius: 12px;
    box-shadow: 0 3px 8px rgb(0 0 0 / 0.3);
    overflow: hidden;
  }
  .faq-question {
    cursor: pointer;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 1.1rem;
    user-select: none;
    background: #234772;
    transition: background-color 0.3s ease;
    border: none;
    width: 100%;
    text-align: right;
  }
  .faq-question:hover,
  .faq-question:focus {
    background-color: #2a7deb;
    outline: none;
  }
  .faq-icon {
    font-family: 'Material Icons';
    font-size: 24px;
    transition: transform 0.3s ease;
    color: #a5c7ff;
    user-select: none;
    flex-shrink: 0;
  }
  .faq-icon.open {
    transform: rotate(-180deg);
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 20px;
    font-size: 1rem;
    line-height: 1.5;
    color: #ccd8ffdd;
    transition: max-height 0.4s ease, padding 0.4s ease;
  }
  .faq-answer.open {
    max-height: 300px;
    padding: 12px 20px;
  }
  /* Footer */
  footer.footer {
    background: #0a1f3a;
    color: #a8bcd7;
    text-align: center;
    padding: 24px 16px;
    font-size: 0.9rem;
    box-shadow: 0 -3px 10px rgb(0 0 0 / 0.2);
  }
  footer.footer .footer-content {
    max-width: 900px;
    margin: auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
    font-size: 0.9rem;
  }
  footer.footer .footer-section {
    flex: 1 1 200px;
    min-width: 180px;
  }
  footer.footer h3 {
    color: #c0d5ff;
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 1.1rem;
  }
  footer.footer a {
    color: #a8bcd7;
    text-decoration: none;
    display: block;
    margin-bottom: 6px;
    transition: color 0.3s ease;
  }
  footer.footer a:hover,
  footer.footer a:focus {
    color: #0077ff;
    outline: none;
  }

  /* Responsive */
  @media (max-width: 900px) {
    .products-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }
    footer.footer .footer-content {
      flex-direction: column;
      align-items: center;
    }
    .faq-item {
      max-width: 100%;
    }
  }
  @media (max-width: 600px) {
    header {
      justify-content: center;
      gap: 12px;
      padding: 1rem;
    }
    nav.menu {
      display: none;
    }
    main {
      padding: 0 12px 48px;
      gap: 36px;
    }
    .slide h2 {
      font-size: 1.6rem;
    }
    .slide p {
      font-size: 1rem;
      max-width: 100%;
    }
    .products-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: 6px;
    }
    .product-info {
      font-size: 0.7rem;
      padding: 4px 6px;
    }
    section#contact {
      padding: 30px 16px;
    }
    section#contact h2 {
      font-size: 1.6rem;
    }
    section#contact a.contact-link {
      padding: 12px 24px;
      font-size: 1rem;
    }
    .search-container {
      max-width: 80%;
      margin: 0.75rem auto 0 auto;
      flex-grow: unset;
    }
    .search-container input[type="search"] {
      width: 100%;
    }
    footer.footer .footer-content {
      text-align: center;
    }
    footer.footer .footer-section {
      min-width: auto;
    }
  }
  @media (max-width: 400px) {
    .products-grid {
      grid-template-columns: repeat(3, minmax(90px, 1fr));
    }
    .search-container input[type="search"] {
      width: 100%;
    }
  }