codex.docs/src/frontend/styles/components/writing.pcss

.writing-header {
  display: flex;
  position: sticky;
  top: 0;
  padding: 15px 0;
  margin-top: calc(-1 * var(--layout-padding-vertical));
  background: #fff;
  box-shadow: 0 3px 10px #fff;
  z-index: 2;
  font-size: 14px;

  &__save {
    @apply --button;
    @apply --button-primary;
    margin: auto;
  }

  &__left {
    margin: auto 0;
    color: var(--color-text-second);

    & span {
      margin-right: 10px;
    }
  }

  select {
    max-width: 100px;
    vertical-align: bottom;
  }
}

.writing-buttons {
  display: flex;

  button:not(:last-child) {
    margin-right: 20px;
  }
}

.uri-input {
  box-sizing: border-box;
  width: 100%;
  padding: 10px 12px;
  border-radius: 3px;
  border: 1px solid rgba(201, 201, 204, 0.48);
  box-shadow: inset 0 1px 2px 0 rgba(35, 44, 72, 0.06);
  outline: none;
}

.writing-editor {
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0.005em;

  .ce-code__textarea {
    color: #41314e;
    line-height: 1.6em;
    font-size: 12px;
    background: var(--color-bg-light);
    border: 1px solid #f1f1f4;
    box-shadow: none;
  }

  .ce-paragraph a {
    color: inherit;
  }

  .ce-header {
    @apply --font-serif;
  }
}

.codex-editor__redactor .ce-block:first-of-type .ce-header {
  font-size: 32px;
}