<button><span>👍</span>Thumbs up</button>
<button><span>👎</span>Thumbs Down</button>
<button><span>😃</span>Grinning Face with Big Eyes</button>
<button><span>😂</span>Face with Tears of Joy</button>

@import url("https://fonts.googleapis.com/css2?family=Ramabhadra&display=swap");
@layer layout, demo;

@layer demo {
  :root {
    @supports (interpolate-size: allow-keywords) {
      interpolate-size: allow-keywords;
    }
  }

  button {
    width: 4rem;
    overflow-x: clip;
    transition: width 0.35s ease;
    white-space: nowrap;
    &:is(:hover, :focus) {
      width: auto;
    }
  }
}

@layer layout {
  * {
    box-sizing: border-box;
  }

  body {
    margin: 0;
    padding: 2vmax;
    display: flex;
    align-items: start;
    gap: 3vmin;
    min-height: 100dvh;
    flex-direction: column;
    background: #111;
  }

  button {
    display: flex;
    justify-content: start;
    align-items: center;
    padding: 0.1rem 1rem;
    gap: 1rem;
    border-radius: 2rem;
    font-family: "Ramabhadra", sans-serif;
    background-image: linear-gradient(
      to bottom right in oklab,
      oklch(80% 0.4 314) 0%,
      oklch(40% 0.39 312) 100%
    );
    border: none;
    color: white;
    font-size: 2rem;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
    cursor: pointer;
  }
}