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Button und Textbox auf selber Höhe

Button und Textbox auf selber Höhe

Hallo, ich hab das Problem, dass bei mir der Button versetzt zur Textbox angezeigt wird. Wie kann ich dies beheben?

Der hier verwendete Code

<style> #records{ margin-top: 123px; background-color: aquamarine; font-size: 30px; } #textbox_top{ border-style: solid; border-color: olive; border-width: 2px; font-size:30px; border-radius: 20px; padding-left: 20px; padding-right: 20px; width:70%; } .radio_button_top{ } #whole_area_top{ } #button_area{ border-radius: 20px; background-color: red; border-width: 2px; border-color: blue; color: white; height:45px; width: 20%; } #button_area:hover{ background-color: green; } #textbox_top::-webkit-input-placeholder { /* WebKit, Blink, Edge */ color: #CCCCCC; font-family: 'Grand Hotel'; font-size: 30px; font-weight: bold; } #textbox_top:-moz-placeholder { /* Mozilla Firefox 4 to 18 */ color: #CCCCCC; opacity: 1; font-family:'Grand Hotel'; font-size: 30px; font-weight: bold; } #textbox_top::-moz-placeholder { /* Mozilla Firefox 19+ */ color: #CCCCCC; opacity: 1; font-family: 'Grand Hotel'; font-size: 30px; font-weight: bold; } #textbox_top:-ms-input-placeholder { /* Internet Explorer 10-11 */ color: #CCCCCC; font-family: 'Grand Hotel'; font-size: 30px; font-weight: bold; } #textbox_top::-ms-input-placeholder { /* Microsoft Edge */ color: #CCCCCC; font-family: 'Grand Hotel'; font-size: 30px; font-weight: bold; } #textbox_top::placeholder { /* Most modern browsers support this now. */ color: #CCCCCC; font-family: 'Grand Hotel'; font-size: 30px; font-weight: bold; } label { font-size: 20px; } #helfer{ display:flex; } </style> <body> <form action="teststart.php" method="POST"> <div id="helfer"> <input type="text" id="textbox_top" name="textbox_top_php" placeholder=" Ihre Eingabe"> <button id="button_area" type="submit" >Das ist ein Button</button> </div> <label for="radio_button_top"> <input type="radio" id="titel_radio_button" class="radio_button_top" checked onclick="titel_radio_button_clicked()" name="titel_radio_button_php" value="Titel">Titel </label> <input type="radio" id="autor_radio_button" class="radio_button_top" onclick="autor_radio_button_clicked()" name="autor_radio_button_php" value="Autor">Autor </form> </body> </html>