Why does my grid/flex content shift to the right?

I'm trying to better understand the use of grid/flex for responsive layouts.

I have a grid inside of flex object (flex not shown in code) that I cannot seem to remove the "margin" on the far left. I thought by using grid or flex, I could automatically space the elements equally across the page with the same "margin" on the outside edges.

What is causing the shift of the content to the right?

I think I'm missing something fundamental here.

See image:

html:

<div class="wrapper">
    <ul class="parent">
        <li class="child">
            <p class="grandchild"><img  src="https://meta.stackexchange.com/Content/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e"> </p>
            <p class="grandchild">Text 1 - This needs to go below the first image</p>
        </li>
        <li class="child">
            <p class="grandchild"><img src="https://meta.stackexchange.com/Content/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e"></p>
            <p class="grandchild">Text 2 - This needs to go below the second image, but in a second column </p>
        </li>
    </ul>
</div>

css

img {
        border:3px solid green;
        width:100%;

    }
    li {
        list-style-type: none;
    }
  .parent {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        grid-gap: 2rem;
        align-content:center;

    }

    .child  {
        margin:0;
        padding:2rem;
    }
    .grandchild {
        border:1px dashed black;
    }

Solution

Your problem stems from the default way that ul elements are handled by the browser. List items are automatically indented (when you have bullet points).

Add the following to your .parent class;

list-style-type: none;
padding: 0;

Demo;

body {
  margin: 0;
}

img {
  border: 3px solid green;
  width: 100%;
}

.parent {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  grid-gap: 2rem;
  align-content: center;
  list-style-type: none;
  padding: 0;
}

.child {
  margin: 0;
  padding: 2rem;
}

.grandchild {
  border: 1px dashed black;
}

<div class="wrapper">
    <ul class="parent">
        <li class="child">
            <p class="grandchild"><img  src="https://meta.stackexchange.com/Content/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e"> </p>
            <p class="grandchild">Text 1 - This needs to go below the first image</p>
        </li>
        <li class="child">
            <p class="grandchild"><img src="https://meta.stackexchange.com/Content/Img/teams/teams-illo-free-sidebar-promo.svg?v=47faa659a05e"></p>
            <p class="grandchild">Text 2 - This needs to go below the second image, but in a second column </p>
        </li>
    </ul>
</div>