html, body {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-weight: 100;
  margin: 0;
  padding: 0;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: subpixel-antialiased;
}

html {
  height:  100%;
}

body {
  min-height: 100%;
  overflow: hidden;
  position: relative;
}

#intro {
  bottom: 0;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 100;
}

h1 {
  color: rgba(0, 0, 0, 0.65);
  font-size: 12px;
  font-style: italic;
  font-weight: 100;
  letter-spacing: 1px;
  margin-top: 150px;
  text-align: center;
  transition: opacity 0.3s ease-out;
  user-select: none;
}

#play-button {
  background: none;
  border: none;
  cursor: pointer;
  display: block;
  height: 140px;
  margin: 30px auto;
  outline: none;
  position: relative;
  text-align: center;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
  width: 140px;
}

#play-button .play-text {
  border-bottom: 1px solid white;
  color: rgba(0, 0, 0, 0.8);
  display: inline-block;
  font-size: 30px;
  font-variant: small-caps;
  letter-spacing: 3px;
  line-height: 1em;
  margin-top: 38px;
  padding-bottom: 2px;
  position: relative;
  text-indent: 4px;
  transition: all 0.5s ease-out;
  user-select: none;
  z-index: 102;
}

#play-button .speakers-on-text {
  color: rgba(0, 0, 0, 0.3);
  display: block;
  font-size: 11px;
  line-height: 1em;
  margin-top: 8px;
  position: relative;
  text-indent: 5px;
  transition: all 0.5s ease-out;
  user-select: none;
  z-index: 102;
}

#play-button .icon {
  display: block;
  height: 18px;
  margin: 4px auto;
  padding-left: 2px;
  opacity: 0.1;
  position: relative;
  transition: all 0.5s ease-out;
  user-select: none;
  width: 20px;
  z-index: 102;
}

#play-button::before {
  background-color: white;
  border-radius: 50%;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.08);
  content: ' ';
  display: block;
  height: 140px;
  left: 0;
  position: absolute;
  top: 0;
  transform-origin: center;
  transition: all 0.5s ease-out;
  width: 140px;
  z-index: 101;
}

#play-button:hover .play-text {
  border-bottom: 1px solid #f2c02c;
  color: rgba(0, 0, 0, 1);
}

#play-button:hover .speakers-on-text {
  color: rgba(0, 0, 0, 0.7);
}

#play-button:hover .icon {
  opacity: 0.4;
}

#play-button:hover::before {
  background-color: #ffcc33;
  transform: scale(1.35);
}

body.playing h1 {
  opacity: 0;
}

body.playing #play-button .icon {
  opacity: 0;
  transform: scale(0.95);
}

body.playing #play-button .play-text {
  opacity: 0;
  transform: scale(0.95);
}

body.playing #play-button .speakers-on-text {
  opacity: 0;
  transform: scale(0.95);
}

body.playing #play-button::before {
  color: white;
  opacity: 0;
  transform: scale(4.75);
  transition: all 1.5s ease-out;
}

#droplets-wrapper {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  right: 0;
  top: 0;
  z-index: 50;
}

#droplets {
  align-content: stretch;
  align-items: stretch;
  /* animation: spin-droplets 15s infinite forwards linear; */
  background: white;
  backface-visibility: hidden;
  bottom: 0;
  display: flex;
  flex-direction: column;
  left: 0;
  justify-content: flex-start;
  opacity: 0;
  position: absolute;
  right: 0;
  top: 0;
  transform: translate3d(0, 0, 0); /* force hardware acceleration */
  transition: opacity 0.35s ease-out;
}

body.playing #droplets {
  opacity: 1;
}

.row {
  display: flex;
  flex: 1;
  flex-direction: row;
}

.cell {
  box-sizing: border-box;
  display: block;
  flex: 1;
  height: 100%;
  position: relative;
  text-align: center;
  width: 0; /* ensure equal width columns */
}

.row:not(:last-of-type) {
  border-bottom: 1px solid rgba(0, 0, 0, 0.035);
}

.row .cell:not(:last-of-type) {
  border-right: 1px solid rgba(0, 0, 0, 0.035);
}

.droplet {
  backface-visibility: hidden;
  border-radius: 50%;
  height: 600px;
  left: 50%;
  margin-left: -300px;
  margin-top: -300px;
  position: absolute;
  top: 50%;
  transform-origin: center;
  width: 600px;
}

.droplet::after {
  background: white;
  border-radius: 50%;
  content: ' ';
  display: block;
  height: 20px;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  opacity: 0.25;
  position: absolute;
  top: 50%;
  width: 20px;
}

.droplet.up {
  /* animation duration should be equivalent to DROPLET_ANIMATION_DURATION */
  animation: fade-out 4s normal forwards ease-out, bloom-up 4s normal forwards ease-out;
}

.droplet.right {
  /* animation duration should be equivalent to DROPLET_ANIMATION_DURATION */
  animation: fade-out 4s normal forwards ease-out, bloom-right 4s normal forwards ease-out;
}

.droplet.down {
  /* animation duration should be equivalent to DROPLET_ANIMATION_DURATION */
  animation: fade-out 4s normal forwards ease-out, bloom-down 4s normal forwards ease-out;
}

.droplet.left {
  /* animation duration should be equivalent to DROPLET_ANIMATION_DURATION */
  animation: fade-out 4s normal forwards ease-out, bloom-left 4s normal forwards ease-out;
}

@keyframes spin-droplets {
  0% { transform: rotate3d(0, 0, 0, 0deg); }
  100% { transform: rotate3d(0, 0, 1, 359deg); }
}

@keyframes fade-out {
  0% { opacity: 1; }
  50% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes bloom-up {
  0% { transform: scale(0.01); }
  10% { transform: scale(0.01); }
  100% { transform: scale(1) translate3d(0, -120px, 0); }
}

@keyframes bloom-right {
  0% { transform: scale(0.01); }
  10% { transform: scale(0.01); }
  100% { transform: scale(1) translate3d(120px, 0, 0); }
}

@keyframes bloom-down {
  0% { transform: scale(0.01); }
  10% { transform: scale(0.01); }
  100% { transform: scale(1) translate3d(0, 120px, 0); }
}

@keyframes bloom-left {
  0% { transform: scale(0.01); }
  10% { transform: scale(0.01); }
  100% { transform: scale(1) translate3d(-120px, 0, 0); }
}