.link-anchor {
  position: relative;
  width: 0;
  font-size: .8em;
  opacity: 0;
  transition: opacity .2s ease-in-out;
}
.anchor-wrapper {
  border: none;
}
.anchor-wrapper:hover .link-anchor {
  opacity: 1;
}

section h1[id]:focus,
section h2[id]:focus,
section h3[id]:focus,
section h4[id]:focus,
section h5[id]:focus {
  outline: 0;
}

.rel {
    width: 30%;
    margin: 0 auto;
    position: relative;
    text-align: center;
    padding: 20px;
    border-style: dotted;
    border-color: white;
    border-width: medium;
}

[data-toggle="tooltip"] {
    cursor: help;
}


.popper,
.tooltip {
    position: absolute;
    background: #eee;
    max-width: 300px;
    border-radius: 3px;
    box-shadow: 0 0 2px rgba(0,0,0,0.5);
    padding: 10px;
    text-align: center;
}

.tooltip-inner {font-size: 1.2rem;}

.popper .popper__arrow,
.tooltip .tooltip-arrow {
    width: 0;
    height: 0;
    border-style: solid;
    position: absolute;
    margin: 5px;
}

.tooltip .tooltip-arrow,
.popper .popper__arrow {
    border-color: #eee;
}

.popper[x-placement^="top"],
.tooltip[x-placement^="top"] {
    margin-bottom: 5px;
}
.popper[x-placement^="top"] .popper__arrow,
.tooltip[x-placement^="top"] .tooltip-arrow {
    border-width: 5px 5px 0 5px;
    border-left-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    bottom: -5px;
    left: calc(50% - 5px);
    margin-top: 0;
    margin-bottom: 0;
}
.popper[x-placement^="bottom"],
.tooltip[x-placement^="bottom"] {
    margin-top: 5px;
}
.tooltip[x-placement^="bottom"] .tooltip-arrow,
.popper[x-placement^="bottom"] .popper__arrow {
    border-width: 0 5px 5px 5px;
    border-left-color: transparent;
    border-right-color: transparent;
    border-top-color: transparent;
    top: -5px;
    left: calc(50% - 5px);
    margin-top: 0;
    margin-bottom: 0;
}
.tooltip[x-placement^="right"],
.popper[x-placement^="right"] {
    margin-left: 5px;
}
.popper[x-placement^="right"] .popper__arrow,
.tooltip[x-placement^="right"] .tooltip-arrow {
    border-width: 5px 5px 5px 0;
    border-left-color: transparent;
    border-top-color: transparent;
    border-bottom-color: transparent;
    left: -5px;
    top: calc(50% - 5px);
    margin-left: 0;
    margin-right: 0;
}
.popper[x-placement^="left"],
.tooltip[x-placement^="left"] {
    margin-right: 5px;
}
.popper[x-placement^="left"] .popper__arrow,
.tooltip[x-placement^="left"] .tooltip-arrow {
    border-width: 5px 0 5px 5px;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    right: -5px;
    top: calc(50% - 5px);
    margin-left: 0;
    margin-right: 0;
}