.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 260px;
    background-color: white;
    color: black;
    text-align: center;
    border-radius: 6px;
    padding: 10px 10px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -125px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #fff transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}
.btn {
    border: 0;
    border-radius: 3px;
    box-shadow: rgba(0, 0, 0, .3) 0 5px 15px;
    box-sizing: border-box;
    color: #fff;
    cursor: pointer;
    margin: 2px;
    padding: 5px 20px;
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}
.btn-success {
    background-image: linear-gradient(#00D775, #00BD68);
}
.btn-disabled {
    background-image: linear-gradient(#717075, #6E6D70);
}
input[type="button" i]:disabled {
    background-image: linear-gradient(#717075, #6E6D70);
}
.invalid{
    padding: 0;
    margin: 0;
    line-height: 20px;
    font-size: 11px;
    color: red;
}
.invalid::before {
    position: relative;
    left: -5px;
    content: "✖";
}
.valid {
    padding: 0;
    margin: 0;
    line-height: 20px;
    font-size: 11px;
    color: green;
}

.valid::before {
  position: relative;
  left: -5px;
  content: "✔";
}