Hoe kan ik nou ervoor zorgen dat mijn menu en section gecentreerd en netjes boven elkaar staan en nog steeds zichtbaar/clickable zijn bij resizen?
dit is mn html
<html><body>
<label for="show-menu" class="show-menu">Toon Menu ↓</label>
<input type="checkbox" id="show-menu" role="button">
<ul id="menu">
<li>
<a href="#">Zoek ↓</a>
<ul class="hidden">
<li><a href="#">Eenvoudig</a></li>
<li><a href="#">Meervoudig</a></li>
</ul>
</li>
<li><a href="#">Help</a></li>
<li><a href="#">Info</a></li>
<li><a href="#">Contact</a></li>
</ul>
<section>
<h3>Eenvoudig zoeken</h3>
<table>
<tr>
<td><form action="recent.php" method="post" title="laatst binnengekomen katten" />
</td>
<td><input type="submit" value="Recent binnengekomen" /></td>
</form>
</tr>
<tr><td>Of vul 1! veld in.</td></tr>
<tr><form action="nummer.php" method="post" /><td>Nummer:</td>
<td><input type="text" name="Nummer_id" maxlength="5"/> </td>
<td><input type="submit" value="Zoek" /></td>
<td> <input type="reset" value="Reset" /></td></form>
</tr>
<tr>
<form action="naam.php" method="post" /><td>Naam:</td>
<td><input type="text" name="Naam" maxlength="15"/></td>
<td><input type="submit" value="Zoek" />
<td> <input type="reset" value="Reset" /></td>
</td>
</form></tr>
<tr>
<form action="datum.php" method="get" /><td>Vanaf: </td>
<td><input type="text" name="dag" size="2" maxlength="2" title="dag">-<input type="text" name="maand" size="2" maxlength="2" title="maand">-<input type="text" name="jaar" size=4 maxlength="4" title="jaar">
<td><input type="submit" value="Zoek" /></td>
<td> <input type="reset" value="Reset" /></td>
</form></tr>
<tr>
<form action="kleurcodes.php" method="get" /><td>Kleur(en): </td>
<td><input type="checkbox" name="Code[]" value="2"/>wit
<input type="checkbox" name="Code[]" value="4"/>beige <br>
<input type="checkbox" name="Code[]" value="8"/>rood
<input type="checkbox" name="Code[]" value="16"/>bruin <br>
<input type="checkbox" name="Code[]" value="32"/>cypers
<input type="checkbox" name="Code[]" value="1"/>grijs <br>
<input type="checkbox" name="Code[]" value="64"/>zwart<br>
</td>
<td><input type="submit" value="Zoek" /></td>
</form></tr>
<tr>
<form action="vacht.php" method="get" /><td>Vacht:</td>
<td><select name="Vacht">
<option value="cypers">cypers</option>
<option value="lapje">lapje</option>
<option value="schildpad">schildpad</option>
</select></td>
<td><input type="submit" value="Zoek" /></td>
</form>
</tr>
<tr>
<form action="ras.php" method="post" /><td>Ras: </td>
<td><select name="Ras">
<option value="balinees">Balinees</option>
<option value="Brits korthaar">Brits korthaar</option>
<option value="halflangharig">halflangharig</option>
<option value="langharig">langharig</option>
<option value="ras">ras overig</option>
<option value="siamees">siamees</option>
<option value="Turks korthaar">Turks korthaar</option>
</select>
</td>
<td>
<input type="submit" value="Zoek" /></td>
</form></tr>
<tr>
<form action="bijzonderheden.php" method="post" /><td>Bijz.heden: </td>
<td><select name="Bijzonderheden">
<option value="blauwe ogen">blauwe ogen</option>
<option value="een oog blind">blind</option>
<option value="hazelip">hazelip</option>
<option value="mist oog"> mist oog</option>
<option value="mist staart">mist staart</option>
<option value="mist voorpoot">mist poot</option>
<option value="mist stuk oor">mist stuk oor</option>
<option value="oddeye">odd-eye</option>
<option value="vaal">vaal</option>
</select>
</td>
<td><input type="submit" value="Zoek" /></td>
</form></tr>
</table>
<br><br>
</section>
</body>
</html>
en dit mn css
body {
background: #E8E8E8;
font-family: Verdana, Arial, helvetica, sans-serif;
font-size: 90%;
color: black;
}
/*Strip the ul of padding and list styling*/
ul {
list-style-type:none;
margin-top: -25%;
padding:0;
position: absolute;
}
/*Create a horizontal list with spacing*/
li {
display:inline-block;
float: left;
margin-right: 1px;
}
/*Style for menu links*/
li a {
display:block;
min-width:140px;
height: 50px;
text-align: center;
line-height: 50px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
color: #fff;
background: #828282;
text-decoration: none;
border-radius: 1em;
}
/*Hover state for top level links*/
li:hover a {
background: #be8b0b;
}
/*Style for dropdown links*/
li:hover ul a {
background: #f3f3f3;
color: #828282;
height: 40px;
line-height: 40px;
}
/*Hover state for dropdown links*/
li:hover ul a:hover {
background: #dec685;
color: #fff;
}
/*Hide dropdown links until they are needed*/
li ul {
display: none;
}
/*Make dropdown links vertical*/
li ul li {
display: block;
float: none;
}
/*Prevent text wrapping*/
li ul li a {
width: auto;
min-width: 100px;
padding: 0 20px;
}
/*Display the dropdown on hover*/
ul li a:hover + .hidden, .hidden:hover {
display: block;
}
/*Style 'show menu' label button and hide it by default*/
.show-menu {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
text-decoration: none;
color: #fff;
background: #828282;
text-align: center;
padding: 10px 0;
display: none;
}
/*Hide checkbox
input[type=checkbox]{
display: none;
}
*/
#show-menu {
display: none;
}
/*Show menu when invisible checkbox is checked*/
input[type=checkbox]:checked + #menu{
display: block;
}
/*Responsive Styles*/
@media screen and (max-width : 760px){
/*Make dropdown links appear inline*/
ul {
position: static;
display: none;
}
/*Create vertical spacing*/
li {
margin-bottom: 1px;
}
/*Make all menu links full width*/
ul li, li a {
width: 100%;
}
/*Display 'show menu' link*/
.show-menu {
display:block;
}
}
section {
background: #F0F0F0;
color: black;
border-radius: 1em;
padding: 1em;
position: absolute;
top: 50%;
left: 50%;
margin-right: -50%;
transform: translate(-50%, -50%)
}
table {
border-collapse: collapse;
font-size: 90%;
}