header, nav, section, footer {display: block;} .button { background-color: #6394BD; /* blau */ border: 2px solid #FFFFFF; color: white; padding: 15px; text-align: center; text-decoration: none; display: inline-block; font-size: 25px; margin: 4px 2px; cursor: pointer; } .button4 { border-radius: 12px; }