JSFiddle - React, Tailwind, and code Playground

HTML

<div style="padding:5em;">
    <button class="button button_medium" type="button">
        <span class="button__text button__text_medium">Save</span>
    </button>

    <label class="button button_medium">
        <span class="button__text button__text_medium">Save</span>
    </label>

    <span class="button button_medium">
        <span class="button__text button__text_medium">Save</span>
    </span>

    <a class="button button_medium">
        <span class="button__text button__text_medium">Save</span>
    </a>
</div>

CSS

.button {
    font: normal 100% Arial, sans-serif;
    position: relative;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    color: #00f;
    background-color: transparent;
    border: 1px solid #00f;
    border-radius: 3px;
    user-select: none;
    outline: 0;
    cursor: pointer;
    white-space: nowrap;
}

.button_medium {
    padding: 0 12px;
}

.button__text {
    font-weight: 400;
    display: inline-block;
    line-height: 1;
    vertical-align: top;
    white-space: nowrap;
}

.button__text_medium {
    font-size: 90%;
    line-height: 28px;
    letter-spacing: -1px;
}