body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f2f2f2;
}

/* ASIDE */
aside {
  width: 300px;
  height: 400px;

  background-image: url("https://via.placeholder.com/300x400");
  background-size: cover;

  position: absolute;
  top: 10px;
  left: 10px;

  padding: 10px;
  border: 2px solid #333;
  background-color: #fff;
}

aside h2 {
  margin-bottom: 10px;
}

aside ul {
  list-style: none;
  padding: 0;
}

aside li {
  padding: 5px 0;
}

/* CAIXA INTERNA COM SCROLL */
.caixa {
  margin-top: 10px;
  width: 100%;
  height: 180px;

  overflow-y: auto;
  border: 1px solid #aaa;
  background-color: #fff;
}

.caixa p {
  padding: 6px;
  margin: 0;
  border-bottom: 1px solid #ddd;
}

/* MAIN (STACKED COLUMN PRINCIPAL) */
main {
  width: 850px;
  min-height: 500px;

  background-color: #fff7e6;
  border: 4px double #8b6b4f;

  color: #3d3028;

  margin-left: 330px;
  margin-top: 10px;

  padding: 15px;
}

.grid {
  margin-bottom: 20px;
}

.grid iframe {
  width: 100%;
  height: 600px;
  border: 1px solid #aaa;
  background: white;
}

/* WEBRINGS */
article h3 {
  margin-top: 15px;
  color: #5a4638;
}

article a {
  color: #2b4b7c;
  text-decoration: none;
}

article a:hover {
  text-decoration: underline;
}

article img {
  max-width: 100%;
}

/* CARDS */
.card {
  width: 200px;
  padding: 10px;

  background-color: #fff;
  border: 1px solid #aaa;
}

.card h3 {
  margin-bottom: 5px;
}

/* ARTIGO */
article {
  padding: 10px;
  border-top: 2px solid #8b6b4f;
  margin-top: 10px;
}