.button {
  align-items: center;
  background: var(--color-blue);
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  font-feature-settings: 'c2sc', 'smcp', 'ss05';
  font-size: var(--font-size-small);
  font-weight: 500;
  letter-spacing: var(--letter-spacing);
  line-height: 1em;
  padding: 1em 1.1em;
  place-content: center;
  pointer-events: auto;
  position: relative;
  text-decoration: none;
  user-select: none;
  -webkit-user-select: none;
}

.button:not(.button--app, .button--canvas, .button--deny, .button--grant, .button--green, .button--signup, .button--subtle, .button--text, .button--white) {
  background-image: var(--background-blue-light);
}

.button span {
  display: block;
  margin-bottom: -0.1875em;
  margin-top: -0.2125em;
  z-index: 1;
}

.button__arrow {
  display: inline-block;
  font-family: var(--font-family-martian-mono);
  font-size: var(--font-size-xx-large);
  font-style: normal;
  font-weight: 300;
  letter-spacing: normal;
  line-height: 0;
  margin-right: 0.325em;
  vertical-align: -0.075em;
}

.button__arrow--icon {
  background: currentColor;
  font-size: inherit;
  height: 1.0625em;
  mask: url("/https:/basecamp.com/assets/images/general/icon-previous.svg") center / contain no-repeat;
  vertical-align: -0.18em;
  width: 1.0625em;
}

.button--app {
  background: var(--color-ink);
  padding: 0;
}

.button--app img {
  display: block;
  height: 2.6em;
  width: auto;
}

.button--green {
  background: var(--color-green);
  color: var(--color-white);
}

.button--white {
  background: var(--color-white);
  color: var(--color-ink);
}

.button--signup {
  background: url("/https:/basecamp.com/assets/images/general/logo-mark.webp") 0.6em center / 1.55em auto no-repeat, var(--background-blue-light);
  box-shadow: var(--box-shadow-button);
  padding-left: 2.6em;
}

.button--deny {
  background: oklch(var(--oklch-white) / 0.1);
  color: var(--color-white);
}

.button--grant {
  background: var(--color-white);
  color: var(--color-ink);
}

.button--icon {
  padding-left: 2.1em;
}

.button--icon:before {
  aspect-ratio: 1;
  background-position: left center;
  background-repeat: no-repeat;
  background-size: 100% auto;
  content: '';
  display: flex;
  left: 0.6em;
  position: absolute;
  width: 1.2em;
}

.button--icon-github:before {
  background-image: url("/https:/basecamp.com/assets/images/general/icon-github.svg");
  left: 0.725em;
  width: 1em;
}

.button--icon-basecamp:before {
  background-image: url("/https:/basecamp.com/assets/images/general/icon-basecamp.svg");
}

.button--icon-rss {
  padding-left: 2.3em;
}

.button--icon-rss:before {
  background-image: url("/https:/basecamp.com/assets/images/general/icon-rss.svg");
  left: 1.1em;
  width: 0.8em;
}

.button--back:before {
  background-image: url("/https:/basecamp.com/assets/images/general/icon-back.svg");
}

.button--text {
  background: transparent;
  color: var(--color-ink);
}

.button--subtle {
  background: oklch(var(--oklch-ink) / 0.05);
  color: var(--color-ink);
}

.button--canvas {
  background: var(--color-canvas);
  color: var(--color-ink);
}

.button--size-small {
  font-size: var(--font-size-xx-small);
  padding: 0.9em 1em;
}

.button--size-large {
  font-size: var(--font-size-medium);
}

@media(hover: hover) {

  .button {
    transition:
      background-color var(--transition),
      color var(--transition)
    ;
  }

  .button:focus,
  .button:hover {
    background-color: var(--color-blue-hover);
    color: var(--color-white);
  }

  .button--glow {
    --pointer-x-px: calc(var(--pointer-x) * 1px);
    --pointer-y-px: calc(var(--pointer-y) * 1px);

    overflow: clip;
    position: relative;
  }

  .button--glow:after {
    background: radial-gradient(
      8em circle at var(--pointer-x-px, 50%) var(--pointer-y-px, 50%),
      oklch(var(--oklch-white) / 0.1),
      oklch(var(--oklch-white) / 0)
    );
    content: '';
    inset: 0;
    opacity: 0;
    pointer-events: none;
    position: absolute;
    transition: opacity var(--transition);
  }

  .button--glow:focus:after,
  .button--glow:focus-within:after,
  .button--glow:hover:after {
    opacity: 1;
  }

  .button--app:focus,
  .button--app:hover {
    background-color: var(--color-ink-hover);
  }

  .button--green:focus,
  .button--green:hover {
    background-color: var(--color-green-hover);
    color: var(--color-white);
  }

  .button--white:focus,
  .button--white:hover {
    background-color: var(--color-white);
    color: var(--color-ink);
  }

  .button--text:focus,
  .button--text:hover {
    background-color: oklch(var(--oklch-ink) / 0.08);
    color: var(--color-ink);
  }

  .button--subtle:focus,
  .button--subtle:hover {
    background-color: oklch(var(--oklch-ink) / 0.08);
    color: var(--color-ink);
  }

  .button--canvas:focus,
  .button--canvas:hover {
    background-color: var(--color-canvas-hover);
    color: var(--color-ink);
  }

  .button--deny:focus,
  .button--deny:hover {
    background: oklch(var(--oklch-white) / 0.15);
    color: var(--color-white);
  }

  .button--grant:focus,
  .button--grant:hover {
    background: oklch(var(--oklch-white) / 0.9);
    color: var(--color-ink);
  }

}

@media(prefers-color-scheme: dark) {

  .button--app {
    background: var(--color-ink-inverted);
  }

  .button--canvas {
    background: var(--color-ink-2);
  }

  .button--white {
    color: var(--color-ink-inverted);
  }

  .button--app:focus,
  .button--app:hover {
    background-color: var(--color-ink-inverted-hover);
  }

  .button--canvas:focus,
  .button--canvas:hover {
    background-color: var(--color-ink-3);
  }

  .button--white:focus,
  .button--white:hover {
    color: var(--color-ink-inverted);
  }

}