body {
      font-family: 'Inter', sans-serif;
      background-color: #f9fafb;
    }
    /* Scroll Animation */
    .animate-on-scroll {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.6s ease-out, transform 0.6s ease-out;
      will-change: opacity, transform;
    }
    .animate-on-scroll.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* Header-specific styles to ensure no animations */
    #header {
      animation: none !important;
      transition: none !important;
      opacity: 1;
      transform: none;
    }
    /* Hamburger/Close Icon Styles */
    .hamburger, .close {
      transition: opacity 0.3s ease;
    }
    .hamburger {
      opacity: 1;
    }
    .hamburger.hidden {
      opacity: 0;
      display: none;
    }
    .close {
      opacity: 0;
      display: none;
    }
    .close.active {
      opacity: 1;
      display: block;
    }
    /* Mobile Menu Animations */
    #mobile-menu.hidden {
      opacity: 0;
      transform: translateY(-10px);
      pointer-events: none;
    }
    #mobile-menu:not(.hidden) {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }
    .menu-item {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.3s ease, transform 0.3s ease;
    }
    #mobile-menu:not(.hidden) .menu-item {
      opacity: 1;
      transform: translateY(0);
    }
    #mobile-menu:not(.hidden) .menu-item:nth-child(1) { transition-delay: 0.1s; }
    #mobile-menu:not(.hidden) .menu-item:nth-child(2) { transition-delay: 0.2s; }
    #mobile-menu:not(.hidden) .menu-item:nth-child(3) { transition-delay: 0.3s; }
    #mobile-menu:not(.hidden) .menu-item:nth-child(4) { transition-delay: 0.4s; }
    #mobile-menu:not(.hidden) .menu-item:nth-child(5) { transition-delay: 0.5s; }
    /* Back to Top Button Styles */
    #back-to-top {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #3b82f6;
      color: #ffffff;
      padding: 0.75rem;
      border-radius: 50%;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
      z-index: 1000;
    }
    #back-to-top.visible {
      opacity: 1;
      visibility: visible;
    }
    #back-to-top:hover {
      background-color: #2563eb;
      transform: translateY(-2px);
    }
    #back-to-top svg {
      width: 24px;
      height: 24px;
    }
    @media (max-width: 768px) {
      #back-to-top {
        bottom: 15px;
        right: 15px;
        padding: 0.5rem;
      }
      #back-to-top svg {
        width: 20px;
        height: 20px;
      }
    }
    @media (max-width: 480px) {
      #back-to-top {
        bottom: 10px;
        right: 10px;
        padding: 0.5rem;
      }
      #back-to-top svg {
        width: 18px;
        height: 18px;
      }
    }
    /* Hero Section */
    .hero {
      background: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 100%);
      color: #ffffff;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
      z-index: 0;
    }
    .hero .container {
      position: relative;
      z-index: 1;
    }
    .hero h1 {
      font-size: clamp(2rem, 5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.025em;
    }
    .hero p {
      font-size: clamp(1rem, 2.5vw, 1.25rem);
      font-weight: 400;
      line-height: 1.6;
      opacity: 0.9;
    }
    .hero-image img {
      max-width: 100%;
      height: auto;
      max-height: 550px;
      object-fit: contain;
      border-radius: 0.5rem;
    }
    /* Freedom Section */
    .freedom-section {
      background-color: #ffffff;
      padding: 4rem 1rem;
      border-radius: 1rem;
      margin: 2rem 0;
    }
    .freedom-heading {
      font-size: clamp(1.5rem, 5vw, 2rem);
      font-weight: 700;
      color: #1e3a8a;
      text-align: center;
      margin-bottom: 2rem;
    }
    .freedom-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
      margin-bottom: 2rem;
    }
    .freedom-item {
      background-color: #f9fafb;
      padding: 1.5rem;
      border-radius: 0.5rem;
      text-align: center;
      transition: transform 0.3s ease;
    }
    .freedom-item:hover {
      transform: translateY(-5px);
    }
    .freedom-icon img {
      width: 48px;
      height: 48px;
      object-fit: contain;
      margin-bottom: 1rem;
    }
    .freedom-item h3 {
      font-size: clamp(1rem, 3vw, 1.25rem);
      font-weight: 600;
      color: #1e3a8a;
      margin-bottom: 0.5rem;
    }
    .freedom-item p {
      font-size: clamp(0.875rem, 2.5vw, 1rem);
      color: #4b5563;
    }
    .freedom-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2rem;
    }
    .device-mockup img {
      width: 100%;
      max-width: clamp(250px, 50vw, 450px);
      height: auto;
      border-radius: 1rem;
      object-fit: contain;
    }
    .freedom-cta h3 {
      font-size: clamp(1.25rem, 4vw, 1.5rem);
      font-weight: 600;
      color: #1e3a8a;
      margin-bottom: 0.5rem;
    }
    .freedom-cta p {
      font-size: clamp(0.875rem, 2.5vw, 1rem);
      color: #4b5563;
      margin-bottom: 1rem;
    }
    .app-store-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      justify-content: center;
    }
    .app-store-buttons img {
      width: 100%;
      max-width: clamp(120px, 30vw, 150px);
      height: auto;
      transition: transform 0.3s ease;
    }
    .app-store-buttons img:hover {
      transform: scale(1.05);
    }
    /* Mission Section */
    .mission-section {
      background-color: #f1f5f9;
      padding: 4rem 1rem;
      border-radius: 1rem;
      margin: 2rem 0;
      text-align: center;
    }
    .mission-icon {
      width: 200px;
      height: 200px;
      margin: 0 auto 1.5rem;
    }
    .mission-icon img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    .mission-title {
      font-size: clamp(1.5rem, 4vw, 2rem);
      font-weight: 700;
      color: #1e3a8a;
      margin-bottom: 1rem;
    }
    .mission-description {
      font-size: clamp(1rem, 2.5vw, 1.125rem);
      color: #4b5563;
      line-height: 1.6;
      max-width: 800px;
      margin: 0 auto;
    }
    /* Why Choose BillVers Section (Carousel Style) */
    .why-choose-section {
      background-color: #ffffff;
      padding: 4rem 1rem;
      border-radius: 1rem;
      margin: 2rem 0;
    }
    .why-choose-title {
      font-size: clamp(1.5rem, 4vw, 2rem);
      font-weight: 700;
      color: #1e3a8a;
      text-align: center;
      margin-bottom: 2rem;
    }
    .features-slider {
      display: flex;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
      gap: 1.5rem;
      padding-bottom: 1rem;
      scroll-behavior: smooth;
    }
    .feature-slide {
      flex: 0 0 auto;
      width: clamp(250px, 80%, 300px);
      background-color: #f9fafb;
      padding: 1.5rem;
      border-radius: 0.5rem;
      text-align: center;
      scroll-snap-align: center;
      transition: transform 0.3s ease;
    }
    .feature-slide:hover {
      transform: translateY(-5px);
    }
    .feature-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 1rem;
    }
    .feature-icon img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    .feature-slide h3 {
      font-size: clamp(1rem, 3vw, 1.25rem);
      font-weight: 600;
      color: #1e3a8a;
      margin-bottom: 0.5rem;
    }
    .feature-slide p {
      font-size: clamp(0.875rem, 2.5vw, 1rem);
      color: #4b5563;
    }
    .carousel-controls {
      display: flex;
      justify-content: center;
      gap: 1rem;
      margin-top: 1.5rem;
    }
    .carousel-btn {
      background-color: #3b82f6;
      color: #ffffff;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }
    .carousel-btn:hover {
      background-color: #2563eb;
    }
    .carousel-btn i {
      font-size: 1.25rem;
    }
    .carousel-btn:disabled {
      background-color: #d1d5db;
      cursor: not-allowed;
    }
    .features-slider::-webkit-scrollbar {
      display: none;
    }
    .features-slider {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }
    /* Story Carousel */
    .story-carousel {
      max-width: clamp(250px, 50vw, 400px);
      margin: 0 auto;
      position: relative;
    }
    .carousel-track {
      display: flex;
      transition: transform 0.5s ease-in-out;
    }
    .carousel-item {
      flex: 0 0 100%;
      width: 100%;
    }
    .carousel-item img {
      width: 100%;
      height: auto;
      max-height: 400px;
      object-fit: contain;
      border-radius: 1rem;
    }
    .carousel-indicators {
      position: absolute;
      bottom: 8px;
      left: 0;
      right: 0;
      display: flex;
      justify-content: center;
      gap: 8px;
    }
    .carousel-indicators .indicator {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: #d1d5db;
      opacity: 0.5;
      cursor: pointer;
      transition: background-color 0.3s ease, opacity 0.3s ease;
    }
    .carousel-indicators .indicator.active {
      background-color: #3b82f6;
      opacity: 1;
    }
    /* Contact Section */
    .contact-section {
      background-color: #ffffff;
      padding: 4rem 1rem;
      border-radius: 1rem;
      margin: 2rem 0;
      text-align: center;
    }
    .contact-title {
      font-size: clamp(1.5rem, 4vw, 2rem);
      font-weight: 700;
      color: #1e3a8a;
      margin-bottom: 1rem;
    }
    .contact-text {
      font-size: clamp(1rem, 2.5vw, 1.125rem);
      color: #4b5563;
      margin-bottom: 2rem;
    }
    .contact-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      justify-content: center;
    }
    .contact-buttons a {
      padding: 0.75rem 1.5rem;
      font-size: clamp(0.875rem, 2vw, 1rem);
      font-weight: 600;
      border-radius: 0.5rem;
      transition: all 0.3s ease;
      text-decoration: none;
    }
    .contact-buttons a:first-child {
      background-color: #3b82f6;
      color: #ffffff;
    }
    .contact-buttons a:first-child:hover {
      background-color: #2563eb;
      transform: translateY(-2px);
    }
    .contact-buttons a:last-child {
      background-color: #1e3a8a;
      color: #ffffff;
    }
    .contact-buttons a:last-child:hover {
      background-color: #1e40af;
      transform: translateY(-2px);
    }
    /* Responsive Adjustments */
    @media (min-width: 768px) {
      .freedom-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
      }
      .device-mockup,
      .freedom-cta {
        flex: 1;
      }
      .freedom-cta {
        text-align: left;
      }
      .story-container {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2rem;
      }
      .story-content,
      .story-image {
        flex: 1;
      }
      .story-carousel {
        max-width: clamp(300px, 45vw, 450px);
      }
      .carousel-item img {
        max-height: 450px;
      }
      .features-slider {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        overflow-x: hidden;
        scroll-snap-type: none;
      }
      .feature-slide {
        width: 100%;
      }
      .carousel-controls {
        display: none;
      }
    }
    @media (max-width: 768px) {
      .hero {
        padding-top: 3rem;
        padding-bottom: 3rem;
      }
      .hero-image {
        order: -1;
        margin-bottom: 1.5rem;
      }
      .hero-content {
        text-align: center;
      }
      .hero-image img {
        max-height: 350px;
      }
      .freedom-section,
      .mission-section,
      .why-choose-section,
      .story-section,
      .contact-section {
        padding: 2rem 1rem;
      }
      .freedom-features {
        grid-template-columns: 1fr;
      }
      .device-mockup img {
        max-width: clamp(200px, 80vw, 350px);
      }
      .story-container {
        flex-direction: column;
      }
      .feature-slide {
        width: clamp(200px, 70%, 250px);
      }
      .carousel-item img {
        max-height: 300px;
      }
    }
    @media (max-width: 480px) {
      .hero h1 {
        font-size: clamp(1.75rem, 4vw, 2.25rem);
      }
      .hero p {
        font-size: clamp(0.875rem, 2.5vw, 1rem);
      }
      .hero-image img {
        max-height: 300px;
      }
      .freedom-heading,
      .mission-title,
      .why-choose-title,
      .story-title,
      .contact-title {
        font-size: clamp(1.25rem, 4vw, 1.5rem);
      }
      .freedom-item,
      .feature-slide {
        padding: 1rem;
      }
      .freedom-icon img,
      .feature-icon {
        width: 36px;
        height: 36px;
      }
      .app-store-buttons img {
        max-width: clamp(100px, 25vw, 120px);
      }
      .contact-buttons a {
        padding: 0.5rem 1rem;
        font-size: clamp(0.75rem, 2vw, 0.875rem);
      }
      .carousel-item img {
        max-height: 250px;
      }
      .carousel-indicators {
        bottom: 4px;
      }
      .carousel-indicators .indicator {
        width: 8px;
        height: 8px;
      }
    }