@import url("https://fonts.googleapis.com/css?family=Roboto&display=swap");
* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  touch-action: manipulation;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-family: "Roboto", sans-serif;
  background-color: #f4f5f6;
  font-size: 14px;
  color: #666666;
  margin: 0;
  padding: 15px;
}

.button {
  position: relative;
  padding: 0;
  width: 200px;
  height: 200px;
  border: 4px solid #888888;
  outline: none;
  background-color: #f4f5f6;
  border-radius: 40px;
  box-shadow: -6px -20px 35px #ffffff, -6px -10px 15px #ffffff, -20px 0px 30px #ffffff, 6px 20px 25px rgba(0, 0, 0, 0.2);
  transition: 0.13s ease-in-out;
  cursor: pointer;
  max-width: 100%;
}

.button:active {
  box-shadow: none;
}

.button:active .button__content {
  box-shadow: none;
}

.button:active .button__content .button__text, .button:active .button__content .button__icon {
  transform: translate3d(0px, 0px, 0px);
}

.button__content {
  position: relative;
  display: grid;
  padding: 20px;
  width: 100%;
  height: 100%;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  box-shadow: inset 0px -8px 0px #dddddd, 0px -8px 0px #f4f5f6;
  border-radius: 40px;
  transition: 0.13s ease-in-out;
  z-index: 1;
}

.button__icon {
  position: relative;
  display: flex;
  transform: translate3d(0px, -4px, 0px);
  grid-column: 4;
  align-self: start;
  justify-self: end;
  width: 45px;
  height: 45px;
  transition: 0.13s ease-in-out;
}

.button__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.button__text {
  position: relative;
  transform: translate3d(0px, -4px, 0px);
  margin: 0;
  align-self: end;
  grid-column: 1/5;
  grid-row: 3;
  text-align: center;
  font-size: 19px;
  background-color: #888888;
  color: transparent;
  text-shadow: 2px 2px 3px rgba(255, 255, 255, 0.5);
  -webkit-background-clip: text;
  -moz-background-clip: text;
  background-clip: text;
  transition: 0.13s ease-in-out;
}

/* Media queries for responsive design */
@media (max-width: 480px) {
  .button {
    width: 160px;
    height: 160px;
    border-radius: 30px;
  }
  
  .button__content {
    padding: 15px;
    border-radius: 30px;
  }
  
  .button__icon {
    width: 35px;
    height: 35px;
  }
  
  .button__text {
    font-size: 16px;
  }
}

@media (max-width: 320px) {
  .button {
    width: 140px;
    height: 140px;
    border-radius: 25px;
  }
  
  .button__content {
    padding: 12px;
    border-radius: 25px;
  }
  
  .button__icon {
    width: 30px;
    height: 30px;
  }
  
  .button__text {
    font-size: 14px;
  }
}

.credits {
  margin-top: 24px;
}

.credits__reference {
  display: inline-block;
  border-bottom: 1px solid transparent;
  color: #0099ff;
  text-decoration: none;
  transition: ease-in 0.13s;
}

.credits__reference:hover {
  border-bottom-color: #0099ff;
}