.claim{position:relative;display:inline-block;text-decoration-line:underline;text-decoration-color:#307a7c}.onderzoek{visibility:hidden;background-color:#307a7c;color:#fff;text-align:left;padding:10px 10px;margin:10px 10%;border-radius:6px;opacity:0;transition:all 0.5s ease-out;position:absolute;z-index:1}.claim:hover~.onderzoek{visibility:visible;opacity:1;transition:all 0.5s ease-in}a[href^="tel"]{color:inherit;text-decoration:underline}