:root {
      --primary-color: #FF6B00;
      --primary-light: #FFE8DC;
      --secondary-color: #FF8C42;
      --dark-color: #1A1A1A;
      --gray-dark: #333333;
      --gray-medium: #6C757D;
      --gray-light: #F8F9FA;
      --success-color: #28A745;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
      background-color: white;
      color: var(--dark-color);
      line-height: 1.6;
    }

    @media (min-width: 1200px) {
      .container {
        max-width: 1140px;
      }
    }

    .navbar {
      padding: 1.5rem 0;
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    }

    .navbar-brand {
      font-weight: 800;
      color: var(--primary-color) !important;
      font-size: 1.5rem;
      letter-spacing: -0.5px;
    }

    .nav-link {
      font-weight: 500;
      padding: 0.5rem 1rem !important;
    }

    .btn {
      font-weight: 600;
      padding: 0.75rem 1.5rem;
      border-radius: 12px;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .btn-primary {
      background-color: var(--primary-color);
      border-color: var(--primary-color);
      box-shadow: 0 4px 14px rgba(255, 107, 0, 0.3);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      background-color: var(--secondary-color);
      border-color: var(--secondary-color);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 107, 0, 0.4);
    }

    .btn-outline-primary {
      color: var(--primary-color);
      border-color: var(--primary-color);
    }

    .btn-outline-primary:hover {
      background-color: var(--primary-light);
      color: var(--primary-color);
    }

    .hero-section {
      padding: 5rem 0;
    }

    .display-4 {
      font-weight: 800;
      letter-spacing: -1px;
      line-height: 1.2;
    }

    .lead {
      font-size: 1.25rem;
      color: var(--gray-medium);
    }

    .feature-icon {
      font-size: 2.5rem;
      color: var(--primary-color);
      margin-bottom: 1.5rem;
      background: var(--primary-light);
      width: 80px;
      height: 80px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 20px;
    }

    .file-drop-area {
      border: 2px dashed #E9ECEF;
      border-radius: 20px;
      padding: 3rem;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s;
      background-color: white;
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    }

    .file-drop-area:hover {
      border-color: var(--primary-color);
      background-color: rgba(255, 107, 0, 0.03);
      transform: translateY(-5px);
      box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
    }

    .file-drop-area.active {
      border-color: var(--primary-color);
      background-color: rgba(255, 107, 0, 0.1);
    }

    .section-title {
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 1.5rem;
    }

    .section-subtitle {
      color: var(--gray-medium);
      margin-bottom: 3rem;
    }

    .feature-card {
      background: white;
      border-radius: 16px;
      padding: 2.5rem;
      height: 100%;
      transition: all 0.3s;
      border: 1px solid #F1F1F1;
    }

    .feature-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    }

    .feature-card h4 {
      font-weight: 700;
      margin-bottom: 1rem;
    }

    .feature-card p {
      color: var(--gray-medium);
    }

    .how-it-works {
      background: linear-gradient(135deg, #FFF8F0 0%, #FFFCF9 100%);
      border-radius: 24px;
      overflow: hidden;
    }

    .how-it-works-step {
      position: relative;
      padding-left: 4rem;
      margin-bottom: 3rem;
    }

    .how-it-works-step .step-number {
      position: absolute;
      left: 0;
      top: 0;
      width: 3rem;
      height: 3rem;
      background-color: var(--primary-color);
      color: white;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1.25rem;
    }

    .how-it-works-step h4 {
      font-weight: 700;
      margin-bottom: 0.75rem;
    }

    .how-it-works-step p {
      color: var(--gray-medium);
    }

    .illustration-img {
      border-radius: 16px;
      box-shadow: 0 25px 50px rgba(0, 0, 0, 0.1);
      transform: perspective(1000px) rotateY(-5deg);
      transition: all 0.5s;
    }

    .illustration-img:hover {
      transform: perspective(1000px) rotateY(0deg);
    }

    .cta-section {
      background: linear-gradient(135deg, #FF6B00 0%, #FF8C42 100%);
      border-radius: 24px;
      color: white;
      padding: 4rem 2rem;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: -50px;
      right: -50px;
      width: 200px;
      height: 200px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -100px;
      width: 300px;
      height: 300px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 50%;
    }

    .cta-section h2 {
      font-weight: 800;
      position: relative;
      z-index: 2;
    }

    .cta-section p {
      opacity: 0.9;
      position: relative;
      z-index: 2;
    }

    .footer {
      background-color: var(--gray-light);
      padding: 4rem 0 2rem;
    }

    .footer h5 {
      font-weight: 700;
      margin-bottom: 1.5rem;
    }

    .footer-links a {
      color: var(--gray-medium);
      text-decoration: none;
      transition: all 0.2s;
      display: block;
      margin-bottom: 0.75rem;
    }

    .footer-links a:hover {
      color: var(--primary-color);
      transform: translateX(5px);
    }

    .social-links a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: white;
      border-radius: 50%;
      color: var(--gray-dark);
      margin-right: 0.75rem;
      transition: all 0.3s;
    }

    .social-links a:hover {
      background: var(--primary-color);
      color: white;
      transform: translateY(-3px);
    }

    .file-progress {
      display: none;
      margin-top: 2rem;
    }

    .progress-bar {
      background-color: var(--primary-color);
      border-radius: 10px;
    }

    /* Animations */
    .animate-float {
      animation: float 6s ease-in-out infinite;
    }

    @keyframes float {
      0% {
        transform: translateY(0px);
      }

      50% {
        transform: translateY(-20px);
      }

      100% {
        transform: translateY(0px);
      }
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .hero-section {
        padding: 3rem 0;
        text-align: center;
      }

      .display-4 {
        font-size: 2.5rem;
      }

      .how-it-works-step {
        padding-left: 3.5rem;
      }

      .illustration-img {
        margin-top: 2rem;
        transform: none !important;
      }
    }

    .share-icons button {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      width: 45px;
      height: 45px;
      margin: 5px;
      border-radius: 50%;
      border: none;
      /* remove default button border */
      cursor: pointer;
      /* pointer on hover */
      color: white;
      font-size: 20px;
      text-decoration: none;
      transition: transform 0.2s ease;
    }

    .share-icons button:hover {
      transform: scale(1.1);
      /* slight zoom on hover */
      opacity: 0.9;
    }

    .share-icons button.whatsapp {
      background-color: #25d366;
    }

    .share-icons button.facebook {
      background-color: #1877f2;
    }

    .share-icons button.email {
      background-color: #34a853;
    }

    .share-icons button.gmail {
      background-color: #ea4335;
    }

    .share-icons button.linkedin {
      background-color: #0a66c2;
    }

    .share-icons button.telegram {
      background-color: #1da1f2;
    }

    .share-icons button.twitter {
      background-color: #0088cc;
    }