JSFiddle - React, Tailwind, and code Playground

HTML

<div class="filter-panel">
  <div class="filter-panel__container">
    <div class="filter-panel__footer">
      <button class="button button_theme-spacewell button_size-m button_bg-red filter-panel__button">
        <span class="button__text">Learn more visit</span>
      </button>
    </div>
  </div>
</div>

SCSS

@import 'https://fonts.googleapis.com/css?family=Roboto';

html, body {
  font-size: 10px;
  font-family: Roboto;
  -webkit-font-smoothing: antialiased;
}

.button {
  cursor: pointer;
  &_theme-spacewell {
    display: inline-block;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 24px;
    color: #fff;
    text-align: center;
    text-transform: uppercase;
    font-family: 'Roboto';
    font-size: 1.6rem;

    .button__text {
      padding: 10px 44px;
    }
  }
  &_size {
    &-m {
      margin-top: 20px;
      font-size: 1.6rem;
      line-height: 3rem;
    }
  }
  &_bg-red {
    background: linear-gradient(to right, #e92c4c, #c82641);
    box-shadow: 2px 2px 6px rgba(228, 35, 68, 0.5);
  }
  &__text {
    display: inline-block;
  }
  &_call {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    position: absolute;
    right: -26px;
  }
}

.filter-panel {
  &__container {
    position: relative;
    margin: 0 auto;
    max-width: 1160px;
  }
  &__header {
    border-radius: 12px 12px 0 0;
    background: #fff;
    box-shadow: 0 0 12px rgba(153, 153, 153, 0.03);
  }
  &__footer {
    z-index: 0;
    height: 84px;
    border-radius: 0 0 12px 12px;
    background: #fff;
    box-shadow: 0 5px 8px -3px rgba(153, 153, 153, 0.41);
  } 
  &__button {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
  }
}