JSFiddle - React, Tailwind, and code Playground

HTML

<input name="login_frm_btn" value="войти" type="submit" class="button-green">

CSS

.button-green{ display: inline-block;
    border: none;
    margin-top: 5px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 13px;
    font-weight: bold;
    line-height: 32px;
    -webkit-border-radius: 3px;
    border-radius: 3px;
    border-width: 2px !important;
    padding-right: 12px;
    padding-left: 12px;
    -webkit-box-shadow: none;
    box-shadow: none;
    color: white;
    height: 32px;
    width: auto;
    text-align: center;
    background: #2e6f6f;
    border-bottom: 5px solid #1f4b4b;}