Tooltip

<div style="position:relative;display:inline-block"><div style="background:#1e293b;color:#fff;padding:8px 16px;border-radius:8px;font-size:0.85em;box-shadow:0 4px 12px rgba(0,0,0,0.3);position:relative">This is a tooltip<div style="position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);width:0;height:0;border-left:6px solid transparent;border-right:6px solid transparent;border-top:6px solid #1e293b"></div></div></div>