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

html,
body {
  width: 100%;
  padding: 1rem;
}

h1 {
  margin: 1rem auto;
}

p {
  color: #f00;
  font-weight: bold;
  margin-bottom: 1rem;
}

.container {
  background-color: #ededed;
  padding: 1rem;
  border-radius: 1rem;

  .header {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    border-radius: 0.75rem;

    background-color: #d3d3d3;

    button {
      all: unset;
      flex: auto 1 0;
      padding: 0.5rem;
      background-color: #fbfcff;
      text-align: center;
      border-radius: 0.5rem;
      box-shadow: 0 0 5px #4d4d4d;
      cursor: pointer;
    }

    button.active {
      background-color: #cafbf8;
      font-weight: 900;
      box-shadow: 0 0 10px #4d4d4d inset;
    }
  }

  .posts {
    margin-top: 1rem;
    padding: 1rem 5rem;
    border-radius: 0.75rem;

    background-color: #d3d3d3;
  }
}