Template:CS button/styles.css

/* The wrapper defines width; the inner link gets the button skin */
.capsach-btn { display:inline-block; width:278px; max-width:100%; box-sizing:border-box; }

/* Button look on the inner anchor/span */
.capsach-btn > a,
.capsach-btn > .capsach-btn__inner {
  display:block;
  padding:.2em 1.5em;
  font: inherit;               /* inherit site font & size */
  color:#202122;
  background-color:#FEE330;
  text-decoration:none;
  border:none;
  border-radius:9999px;
  text-align:center;
  white-space:nowrap;
  transition:background-color .15s, transform .05s;
  cursor:pointer;
}

.capsach-btn > a:hover,
.capsach-btn > .capsach-btn__inner:hover { background-color:#FFDD00; }

.capsach-btn > a:active,
.capsach-btn > .capsach-btn__inner:active { background-color:#F0C800; transform:translateY(1px); }

/* Mobile-only full width (opt-in via |mobile=full) */
@media (max-width:720px){
  .capsach-btn--mobile { display:block; width:100% !important; }
}

/* alignment helpers unchanged */
.capsach-align        { text-align:left; }
.capsach-align-right  { text-align:right; }
.capsach-align-center { text-align:center; }
.capsach-align-left   { text-align:left; }