* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4ecf7 100%);
  font-family: "Segoe UI", system-ui, sans-serif;
}

#stage {
  position: relative;
  width: 100%;
  height: 100%;
}

.smiley {
  position: absolute;
  pointer-events: none;
  user-select: none;
  animation: pop 0.5s cubic-bezier(.34,1.56,.64,1), float 2.6s ease-in-out infinite, fade 3s ease-in forwards;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,.12));
}

.smiley svg {
  width: 100%;
  height: 100%;
  animation: wobble 1.8s ease-in-out infinite;
}

@keyframes pop {
  0% { transform: scale(0) rotate(-20deg); opacity: 0; }
  60% { transform: scale(1.15) rotate(8deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}

@keyframes float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -22px; }
}

@keyframes fade {
  0% { opacity: 1; }
  75% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes wobble {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-6deg); }
  75% { transform: rotate(6deg); }
}