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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Poppins', sans-serif;
      background-color: #f9fafb;
      color: #1f2937;
      line-height: 1.7;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* === HEADER === */
    .header {
      background: linear-gradient(135deg, #1e40af, #3b82f6);
      color: white;
      padding: 1.5rem 0;
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 700;
    }

    .nav-list {
      display: flex;
      gap: 2rem;
      list-style: none;
    }

    .nav-link {
      color: white;
      font-weight: 600;
      font-size: 1.1rem;
      text-decoration: none;
      position: relative;
      transition: color 0.3s ease;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: #fbbf24;
      transition: width 0.3s ease;
    }

    .nav-link:hover {
      color: #fbbf24;
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .menu-btn {
      display: none;
      background: none;
      border: none;
      color: white;
      font-size: 1.8rem;
      cursor: pointer;
    }

    .mobile-nav {
      display: none;
      background: #1e40af;
      padding: 1.5rem 0;
    }

    .mobile-nav.active {
      display: block;
    }

    .mobile-nav .nav-list {
      flex-direction: column;
      gap: 1rem;
      padding: 0 1.5rem;
    }

    /* === HERO === */
    .hero {
      background: linear-gradient(135deg, #2563eb, #3b82f6);
      color: white;
      text-align: center;
      padding: 6rem 1.5rem;
    }

    .hero h2 {
      font-size: 3.5rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
    }

    .hero p {
      font-size: 1.3rem;
      max-width: 800px;
      margin: 0 auto 2rem;
    }

    .btn {
      display: inline-block;
      background: linear-gradient(to right, #facc15, #f97316);
      color: white;
      padding: 1rem 2.5rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 1.2rem;
      text-decoration: none;
      box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
      transition: all 0.3s ease;
    }

    .btn:hover {
      background: linear-gradient(to right, #f97316, #facc15);
      transform: scale(1.05);
      box-shadow: 0 12px 25px rgba(249, 115, 22, 0.4);
    }

    /* === SECTION === */
    .section {
      padding: 4rem 0;
    }

    .section-title {
      text-align: center;
      font-size: 2.8rem;
      font-weight: 700;
      margin-bottom: 0px;
      color: #1f2937;
    }


        #observation {
           text-align: center;
        margin-bottom: 2rem;

    }

    /* === CARDS === */
    .grid {
      display: grid;
      gap: 2rem;
    }

    .grid-3 {
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .grid-2 {
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .grid-4 {
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

    .card {
      background: white;
      padding: 2rem;
      border-radius: 1rem;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
      text-align: center;
      transition: all 0.3s ease;
    }

    .card:hover {
      transform: translateY(-8px);
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    }

    .card h3 {
      font-size: 1.6rem;
      color: #2563eb;
      margin-bottom: 1rem;
      font-weight: 600;
    }

    .card p {
      color: #4b5563;
      font-size: 1.1rem;
    }

    /* === COMO FUNCIONA === */
    .step-icon {
      width: 80px;
      height: 80px;
      margin: 0 auto 1.5rem;
      background: linear-gradient(135deg, #3b82f6, #1e40af);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
      transition: transform 0.3s ease;
    }

    .card:hover .step-icon {
      transform: scale(1.1);
    }

    .card h3 {
      font-size: 1.4rem;
      margin-bottom: 0.8rem;
      color: #1e40af;
    }

    .card p {
      font-size: 1rem;
      color: #4b5563;
    }

    /* === CONTATO === */
    .contact {
      background: linear-gradient(135deg, #2563eb, #3b82f6);
      color: white;
      text-align: center;
    }

    .form-container {
      max-width: 600px;
      margin: 0 auto;
      background: white;
      color: #1f2937;
      padding: 2.5rem;
      border-radius: 1.5rem;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    }

    .input, .textarea {
      width: 100%;
      padding: 1rem 1.5rem;
      margin-bottom: 1.2rem;
      border: 1px solid #d1d5db;
      border-radius: 0.75rem;
      font-size: 1.1rem;
      transition: border 0.3s ease;
    }

    .input:focus, .textarea:focus {
      outline: none;
      border-color: #3b82f6;
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    }

    .textarea {
      min-height: 140px;
      resize: vertical;
    }

    /* === FOOTER === */
    .footer {
      background: #111827;
      color: #9ca3af;
      text-align: center;
      padding: 3rem 1.5rem;
    }

    .social-links {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-top: 1.5rem;
    }

    .social-links a {
      color: #9ca3af;
      font-size: 2rem;
      transition: color 0.3s ease;
    }

    .social-links a:hover {
      color: #fbbf24;
    }

    /* === RESPONSIVO === */
    @media (max-width: 768px) {
      .nav-list {
        display: none;
      }

      .menu-btn {
        display: block;
      }

      .mobile-nav.active .nav-list {
        display: flex;
      }

      .hero h2 {
        font-size: 2.5rem;
      }

      .hero p {
        font-size: 1.1rem;
      }

      .section-title {
        font-size: 2.2rem;
      }

      .form-container {
        padding: 2rem;
      }

      .grid-4 {
        grid-template-columns: 1fr;
      }
    }