.tooltip {
    position: relative;
    display: inline-block;
    vertical-align: top;
    cursor: help;
    text-decoration: underline dotted;
}

/* Tooltip laatikko */
.tooltip .tooltip-text {
    visibility: hidden;
    opacity: 0;

    position: absolute;
    z-index: 999;

    bottom: 130%;
    left: 50%;
    transform: translateX(-50%);

    min-width: 220px;
    max-width: 320px;

    padding: 10px 12px;

    background: #283121;
    color: #fff;

    border-radius: 8px;

    text-align: left;
    line-height: 1.4em;
    font-size: 0.9em;

    box-shadow: 0 5px 20px rgba(0,0,0,0.2);

    transition: opacity 0.2s ease;
}

/* Nuoli */
.tooltip .tooltip-text::after {
    content: "";

    position: absolute;
    top: 100%;
    left: 50%;

    margin-left: -6px;

    border-width: 6px;
    border-style: solid;
    border-color: #283121 transparent transparent transparent;
}

/* Hover */
.tooltip:hover .tooltip-text,
.tooltip:focus .tooltip-text,
.tooltip:active .tooltip-text {
    visibility: visible;
    opacity: 1;
}