* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  min-height: 100vh;
  background: #121212;
}
.container {
  position: relative;
  width: 100%;
  height: 200vh;
  overflow: hidden;
}
.bubbles {
  position: relative;
  display: flex;
}
.bubbles {
  z-index: -100;
}
.bubbles span {
  position: relative;
  width: 30px;
  height: 30px;
  background: #1DB954;
  margin: 0 4px;
  border-radius: 50%;
  box-shadow: 0 0 0 10px #1DB95444, 0 0 50px #1DB954, 0 0 100px #1DB954;
  animation: animate 15s linear infinite;
  animation-duration: calc(125s / var(--i));
}
.bubbles span:nth-child(even) {
  background: #ff2d75;
  box-shadow: 0 0 0 10px #ff2d7544, 0 0 50px #ff2d75, 0 0 100px #ff2d75;
}
@keyframes animate {
  0% {
    transform: translateY(100vh) scale(0);
  }
  100% {
    transform: translateY(-100vh) scale(1);
  }
}

.accueil {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 50px;
  background-color: #1DB954;
  color: #191414;
  text-decoration: none;
  font-family: Arial, sans-serif;
  font-weight: bold;
  transition: background-color 0.3s ease;
  top: 20px;
  right: 20px;
}

.accueil a:hover {
  background-color: #1ed760;
}

body {
  font-family: 'Lucida Sans', Arial, sans-serif;
  margin: 0;
  padding: 10px;
  background-color: #121212;
  color: #fff;
}

h1 {
  font-size: 1.5rem;
  color: #1DB954;
  margin-bottom: 10px;
  margin-right: 20px;
}

h3 {
  color: #ff2d75;
  margin-bottom: 10px;
}

.nyan-cat {
  position: fixed;
  bottom: 20px;
  right: 0px;
  margin-right: 20px;
  width: 200px;
  height: auto;
  z-index: -99;
  pointer-events: auto; /* Permet d'activer le clic sur le GIF */
}

button {
  background-color: #1DB954;
  color: #121212;
  border: none;
  padding: 10px 20px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 5px;
  margin-bottom: 15px;
}

button:hover {
  background-color: #1ED760;
}

#fiche1, #fiche2, #fiche3, #fiche4 {
  display: none;
  background-color: #282828;
  padding: 15px;
  border-radius: 5px;
  margin-bottom: 20px;
}

#fiche1 p, #fiche2 p, #fiche3 p, #fiche4 p {
  font-size: 1.0em;
  line-height: 2;
}