Why when scaling a browser window .point elements move from a vertical straight line in the center .timeline_list: before ? The width of the container and the wrapper in%, the left and right at .point are also in% (in px, the same effect). In these situations, too, media queries should be used?
* { box-sizing: border-box; margin: 0; padding: 0; } #timeline { width: 100%; max-width: 1100px; padding: 5px; border: 1px solid black; margin: 0 auto; } .container { width: 70%; margin: 0 auto; } .timeline_list { display: flex; flex-direction: row; flex-wrap: wrap; justify-content: space-between; position: relative; } .timeline_list:before { content: ''; position: absolute; top: 0; bottom: 0; width: 2px; background-color: #000; left: calc(50% - 1px); } .timeline_item { width: 48%; list-style-type: none; padding: 10px; margin-bottom: 10px; position: relative; height: min-content; } .timeline_item--left { color: red; border: 1px solid red; } .timeline_item--right { color: green; border: 1px solid green; margin-top: 30px; } .timeline_item>.point { position: absolute; width: 16px; height: 16px; border-radius: 50%; } .timeline_item--left>.point { top: 0; /* right: -24px; */ right: -6.6%; background-color: red; } .timeline_item--right>.point { top: 0; /* left: 24px; */ left: -6.6%; background-color: green; }
<main id="timeline"> <div class="container"> <ul class="timeline_list"> <li class="timeline_item timeline_item--left"> <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Quo, dolores.</p> <div class="point"></div> </li> <li class="timeline_item timeline_item--right"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Voluptate, maiores?</p> <div class="point"></div> </li> <li class="timeline_item timeline_item--left"> <p>Lorem ipsum dolor sit, amet consectetur adipisicing elit. Ex, pariatur?</p> <div class="point"></div> </li> <li class="timeline_item timeline_item--right"> <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Aspernatur, ipsa?</p> <div class="point"></div> </li> </ul> </div> </main>