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

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

/* 🌌 Universe background */
.scene {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(
      circle at 20% 20%,
      #1b2735 0%,
      #090a0f 60%,
      #000000 100%
    );
}

/* Star canvas */
#stars {
  position: absolute;
  inset: 0;
}

/* Astronaut */
.astronaut {
  position: absolute;
  left: 50%;
  top: 50%;
}


.astronaut:active {
  cursor: grabbing;
}

/* Sound toggle */
#soundToggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  font-size: 16px;
  padding: 8px 10px;
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

#soundToggle:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* Contact button */
.contact-btn {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 18px;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  transition: all 0.35s ease;
}

.contact-btn:hover {
  color: white;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.1);
}