Zentrieren und Funktion des Kontaktformulars ....

[Hl.* Br.* Steffen Härter]

body {

background-color: #29aaa3;

}


/* Das Kontaktformular */

.Form_1 {

width: 420px;
text-align: center;

}


.Rahmen {

border-color: blue;

}


form {
  background-color: #eee;
  width: 400px; /* Breite des Formulars. */
  padding: 20px;
  border: 3px solid blue;
  
}

label { /* Beschriftung auf eigener Zeile. */
  display: block;
  cursor: pointer; /* Mauszeiger wird zur Hand. */
  background-color: gold;
  font-family: Arial Narrow;
  font-size: 1.7em;
}

input#absender,
textarea {
  width: 150px;
  border: 3px solid #8c8c8c;
  margin-bottom: 1em;
}

textarea {
  height: 10em;
  width: 10em;
  background-color: gold;
  font-family: Arial Narrow;
  font-size: 1.7em;
}

input:focus,
textarea:focus 

{
  background-color: #FF9900;
}

h2 {

text-align: center;
font-family: Arial Narrow;

}		

.select {
    position: relative;
    display: inline-block;
    margin-bottom: 15px;
    width: 100%;
}    .select select {
        font-family: 'Arial Narrow';
        display: inline-block;
        width: 100%;
        cursor: pointer;
        padding: 10px 15px;
        outline: 0;
        border: 0px solid #000000;
        border-radius: 7px;
        background: #FF9900;
        color: #001afb;
        appearance: none;
        -webkit-appearance: none;
        -moz-appearance: none;
    }
        .select select::-ms-expand {
            display: none;
        }
        .select select:hover,
        .select select:focus {
            color: blue;
            background: #FF9900;
        }
        .select select:disabled {
            opacity: 0.5;
            pointer-events: none;
        }
.select_arrow {
    position: absolute;
    top: 16px;
    right: 15px;
    pointer-events: none;
    border-style: solid;
    border-width: 8px 5px 0px 5px;
    border-color: #7b7b7b transparent transparent transparent;
}
.select select:hover ~ .select_arrow,
.select select:focus ~ .select_arrow {
    border-top-color: #000000;
}
.select select:disabled ~ .select_arrow {
    border-top-color: #cccccc;
}
			

Das steht in meiner css Datei für das Kontaktformular.

Ist das alles gut?

Es hat den Namen: Style_Kontaktformular.css