.button.dark {
  --background: #242836;
  --rectangle: #1C212E;
  --arrow: #F5F9FF;
  --text: #F5F9FF;
  --success: #2F3545;
}

.button {
  --background: #275efe;
  --rectangle: #184fee;
  --success: #4672f1;
  --text: #fff;
  --arrow: #fff;
  --checkmark: #fff;
  --shadow: rgba(10, 22, 50, .24);
  display: flex;
  overflow: hidden;
  text-decoration: none;
  -webkit-mask-image: -webkit-radial-gradient(white, black);
  background: var(--background);
  border-radius: 8px;
  box-shadow: 0 2px 8px -1px var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button ul {
  margin: 0;
  padding: 16px 40px;
  list-style: none;
  text-align: center;
  position: relative;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  font-size: 16px;
  font-weight: 500;
  line-height: 28px;
  color: var(--text);
}

body {
  min-height: 100vh;
  display: flex;
  font-family: "Roboto", Arial;
  justify-content: center;
  align-items: center;
  background: #E4ECFA;
}
body .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
body .container .row > div {
  flex-basis: 100%;
  width: 0;
}
body .container .button {
  margin: 16px;
}
@media (max-width: 400px) {
  body .container .button {
    margin: 12px;
  }
}