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html css flexbox

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Accepted Answer
July 20, 2026 Score: 2 Rep: 761 Quality: Medium Completeness: 50%

The problem is likely that the is still using its default inline layout. Your flex styling is on .search-container, not on the that actually contains the input and button.

Try making the form itself a flex container:

.search-container form {
  display: flex;
  align-items: center;
}

Also check the default button styles in your browser. Some browsers add their own padding or alignment, which can make the button appear slightly higher.

One other thing: a

shouldn't be a direct child of a
    . Wrap the search form in an
  • instead to keep the HTML valid

    July 20, 2026 Score: 2 Rep: 1,900 Quality: Low Completeness: 60%

    You're almost there. Just need to add form in the css of .search-container.

    Also, I have added height: 36px to search container and form element.

    header {
  width: 100%;
  padding: 0;
  margin: 0;
}
    .top-nav {
  position: relative;   / needed so ul::after (LINE)is positioned relative to the whole nav /
  width: 100%;          / make the nav span the page width /
  box-sizing: border-box;
  font-family: Roboto, sans-serif;
  font-size: 18px;
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: white;
  display: flex;
  gap: 15px;
  / ignore margin /
}
    .top-nav .search-container {
  margin-left: auto;
  display: flex;
  align-items: center;
      / enable bottom to work and keep the search above the grey bar /
  position: relative;
  z-index: 1;
      height: 36px;
}
    .top-nav .search-container form {
  display: flex;
  align-items: center;
  height: 36px;
}
    .top-nav input[type="text"] {
  padding: 2px;
  margin: 0;
  height: 36px;
  font-size: 17px;
  border: 2px solid #ccc;
  border-right: none;                     / removed right border so it joins the button /
  border-top-left-radius: 4px;
  border-bottom-left-radius: 4px;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  box-sizing: border-box;
}
    .top-nav .search-container button {
  padding: 0;
  margin: 0;                               / removed horizontal spacing so it sticks to the input /
  width: 36px;
  height: 36px;
  background: #ddd;
  font-size: 17px;
  border: 2px solid #ccc;                 / match input border /
  border-left: none;                      / remove left border so it joins the input /
  border-top-right-radius: 4px;
  border-bottom-right-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
    .top-nav .search-container button:hover {
  background: #ccc;
}