body {
      font-family: 'Poppins', sans-serif;
      margin: 0;
      padding: 0;
      color: var(--secondary-color);
      background-color: var(--primary-color);
      transition: background-color .3s ease, color .3s ease;
    }

    header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 5px 5%;
      height: 70px;
      background: var(--primary-color);
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    header img { height: 40px; }

    header svg{ width: 70px; }
    header svg #fundo{ fill: var(--primary-color); }
    header svg #front{ fill: var(--secondary-color); }     

    header button {
      background: var(--primary-color);
      border: none;
      color: var(--secondary-color);
      padding: 8px 16px;
      border-radius: 8px;
      cursor: pointer;
      font-weight: 600;
      transition: transform 0.2s ease;
    }

    header button:hover {
      transform: scale(1.05);
    }

    main {
      max-width: 900px;
      margin: 40px auto;
      padding: 20px;
      line-height: 1.8;
      text-align: justify;
    }

    h1, h2 {
      color: var(--accent-color);
      text-align: left;
      margin-bottom: 20px;
    }

    section {
      margin-bottom: 40px;
    }

    footer {
      text-align: center;
      padding: 20px;
      background: var(--primary-color);
      color: var(--secondary-color);
      margin-top: 40px;
      font-size: 0.9rem;
    }

    @media (max-width: 600px) {
      main {
        padding: 15px;
      }
    }