.pushable {
  position: absolute;
  top: 50%;
  left: 50%;
  background: transparent;
  padding: 0px;
  border: none;
  cursor: pointer;
  outline-offset: 4px;
  outline-color: deeppink;
  transition: filter 250ms;
  transform: translate(-50%, 50%);
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  text-decoration: none;
}

.shadow {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: hsl(226, 25%, 69%);
  border-radius: 8px;
  filter: blur(2px);
  will-change: transform;
  transform: translateY(2px);
  transition: transform 600ms cubic-bezier(0.3, 0.7, 0.4, 1);
}

.edge {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  border-radius: 8px;
  background: linear-gradient(
    to right,
    hsl(248, 39%, 39%) 0%,
    hsl(248, 39%, 49%) 8%,
    hsl(248, 39%, 39%) 92%,
    hsl(248, 39%, 29%) 100%
  );
}

.front {
  display: block;
  position: relative;
  border-radius: 8px;
  background: hsl(248, 53%, 58%);
  padding: 16px 40px;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-size: 24px;
  transform: translateY(-4px);
  transition: transform 600ms cubic-bezier(0.3, 0.7, 0.4, 1);
}

.pushable:hover {
  filter: brightness(110%);
}

.pushable:hover .front {
  transform: translateY(-6px);
  transition: transform 250ms cubic-bezier(0.3, 0.7, 0.4, 1.5);
}

.pushable:active .front {
  transform: translateY(-2px);
  transition: transform 34ms;
}

.pushable:hover .shadow {
  transform: translateY(4px);
  transition: transform 250ms cubic-bezier(0.3, 0.7, 0.4, 1.5);
}

.pushable:active .shadow {
  transform: translateY(1px);
  transition: transform 34ms;
}

.pushable:focus:not(:focus-visible) {
  outline: none;
}

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}


body {
  display: flex;
  background-image: url(er.jpg);
  background-repeat: no-repeat;
  font-family: 'Rubik', sans-serif;
  background-position: center;
  background-attachment: fixed;
  background-size: 150%;
  animation: shrink 3s;
  animation-fill-mode: forwards;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.title {
position: absolute;
  top: 130px;        /* augmente cette valeur pour descendre le texte */
  width: 100%;
  text-align: center;
  font-size: 150px; /* texte plus grand */
  color: black;
  margin: 0;  
  animation-name: bounce;
  animation-duration: 1.5s;
  animation-timing-function: ease-out;
  animation-fill-mode: forwards; 
}

@keyframes bounce {
    0%   { transform: translateY(0); }          /* début : pas de déplacement */
    100% { transform: translateY(20vh); }
}

@keyframes shrink {
  0% {
    background-size: 150% 150%;
  }
  100% {
    background-size: 100% 100%;
  }
}