* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
  }
  
  body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: peru;
    font-family: sans-serif;
  }
  
  #container {
    position: relative;
    padding: 7px;
    font-size: 25px;
    font-weight: bold;
    cursor: pointer;
    padding: 0.5rem 1rem;
  }
  
  #tooltip-content {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    background: #000;
    color: #fff;
    white-space: nowrap;
    padding: 10px 15px;
    border-radius: 7px;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.5s ease;
  }
  
  #tooltip-content::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    border: 15px solid;
    border-color: #000 #0000 #0000 #0000;
  }
  
  #container:hover #tooltip-content {
    top: -130%;
    visibility: visible;
    opacity: 1;
  }