.buy {
  display: flex;
  flex-direction: column;
  gap: 1.1em;
  margin-inline: auto;
  pointer-events: auto;
  width: min(100%, 20em);
}

.buy__tab {
  background: var(--color-blue-lighter);
  border-radius: 0.4em;
  box-shadow:
    0 0 0 1px rgba(var(--rgb-black), 0.1),
    0 0.1em 2.8em -0.8em rgba(var(--rgb-black), 0.1),
    0 0.2em 3.2em -1.2em rgba(var(--rgb-black), 0.2),
    0 0.4em 2.0em -1.2em rgba(var(--rgb-black), 0.3),
    0 0.6em 2.4em -1.6em rgba(var(--rgb-black), 0.4),
    0 0.8em 2.8em -2.0em rgba(var(--rgb-black), 0.5)
  ;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.buy__header {
  align-items: center;
  background: var(--color-white);
  box-shadow: 0 1px 0 0 rgba(var(--rgb-blue), 0.1);
  display: flex;
  gap: 0.3em;
  height: 2.4em;
  margin-bottom: 1.1em;
  overflow: hidden;
  padding-left: 0.9em;
  padding-right: 0.9em;
}

.buy__header figure {
  width: 1.3em;
}

.buy__header dl {
  align-items: center;
  color: var(--color-black);
  display: flex;
  flex: 1;
  font-family: var(--font-family-inter-display);
  font-feature-settings: 'case', 'liga', 'dlig', 'ss03';
  font-size: 70%;
  font-weight: 700;
  justify-content: space-between;
  line-height: 1;
}

.buy__content {
  color: var(--color-black);
  font-family: var(--font-family-inter);
  font-feature-settings: 'liga', 'dlig', 'ss03';
  font-weight: 400;
  line-height: 1.5;
  margin: -0.16em 1.1em -0.185em 1.1em;
}

.buy__content h4 {
  font-size: 55%;
  font-weight: 700;
}

.buy__content h4 + * {
  --spacing: 0.425em;
}

.buy__content p {
  font-size: 50%;
}

.buy__content ul {
  display: flex;
  flex-direction: column;
  font-size: 50%;
  gap: 0.3em;
}

.buy__content ul li.icon {
  background-position: left top;
  background-repeat: no-repeat;
  background-size: 1.4em 1.5em;
  padding-left: 2em;
}

.buy__content ul li.icon--video {
  background-image: url('../images/icon-video.svg');
}

.buy__content ul li.icon--updates {
  background-image: url('../images/icon-updates.svg');
}

.buy__content ul li.icon--github {
  background-image: url('../images/icon-github.svg');
}

.buy__content a {
  color: var(--color-blue);
  text-decoration: none;
}

.buy__content b,
.buy__content strong {
  color: var(--color-black);
  letter-spacing: inherit;
}

.buy__content > * + * {
  margin-top: var(--spacing, 1.3em);
}

.buy__button {
  display: flex;
  flex-direction: column;
  margin: 1.1em 0.3em 0.3em 0.3em;
}

.buy__button a {
  background: linear-gradient(
    0deg,
    var(--color-green-dark) 0,
    var(--color-green) 100%
  );
  border-radius: 0.25em;
  box-shadow:
    inset 0 0 0 1px rgba(var(--rgb-black), 0.05),
    inset 0 2px 0 0 rgba(var(--rgb-white), 0.15),
    inset 0 0 0 0 rgba(var(--rgb-white), 0)
  ;
  cursor: pointer;
  display: flex;
  justify-content: center;
  text-decoration: none;
}

.buy__button a span {
  color: var(--color-white);
  font-family: var(--font-family-inter-display);
  font-feature-settings: 'liga', 'dlig', 'ss03';
  font-size: 65%;
  font-weight: 700;
  line-height: 1em;
  padding: 1.175em;
  pointer-events: none;
  text-shadow: 0 1px 0 rgba(var(--rgb-black), 0.05);
}

.buy__notes {
  font-family: var(--font-family-inter);
  font-feature-settings: 'liga', 'dlig', 'ss03';
  font-weight: 400;
  line-height: 1.5;
  margin-bottom: -0.1675em;
  margin-top: -0.1925em;
  text-align: center;
}

.buy__notes p {
  font-size: 50%;
}

.buy__notes a {
  text-decoration: none;
}

.buy__notes span {
  display: inline-block;
}

@media(hover: hover) {

  .buy__content a:focus,
  .buy__content a:hover,
  .buy__notes a:focus,
  .buy__notes a:hover {
    text-decoration: underline;
  }

  .buy__button a {
    transition: box-shadow var(--transition);
  }

  .buy__button a span {
    transition: text-shadow var(--transition);
  }

  .buy__button a:focus,
  .buy__button a:hover {
    box-shadow:
      inset 0 0 0 1px rgba(var(--rgb-black), 0.1),
      inset 0 2px 0 0 rgba(var(--rgb-white), 0.15),
      inset 0 0.6em 1.3em -0.9em rgba(var(--rgb-white), 0.25)
    ;
  }

  .buy__button a:focus span,
  .buy__button a:hover span {
    text-shadow: 0 1px 0 rgba(var(--rgb-black), 0.15);
  }

}

@media(min-width: 64em) {

  .buy {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 101;
  }

  .buy__tab {
    border-radius: 0 0 0.4em 0.4em;
  }

}