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

body {
  font-family: "Baloo Bhai 2", cursive;
  background: radial-gradient(circle at top, #0f172a, #020617);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

section {
  text-align: center;
}

#bulb {
  width: 200px;
  transition: 0.4s ease;
  filter: drop-shadow(0 0 10px rgba(0,0,0,0.4));
}

#bulb.on {
  filter: drop-shadow(0 0 30px #22d3ee) brightness(1.3);
  animation: glow 1.2s infinite alternate;
}

@keyframes glow {
  from {
    filter: drop-shadow(0 0 20px #22d3ee) brightness(1.2);
  }
  to {
    filter: drop-shadow(0 0 40px #38bdf8) brightness(1.4);
  }
}

.toggle-btn {
  margin-top: 30px;
  padding: 14px 36px;
  font-size: 18px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  color: #020617;
  background: linear-gradient(135deg, #22d3ee, #38bdf8);
  box-shadow: 0 10px 25px rgba(56,189,248,0.4);
  transition: 0.3s ease;
}

.toggle-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(56,189,248,0.6);
}

.toggle-btn.active {
  background: linear-gradient(135deg, #f43f5e, #fb7185);
  color: #fff;
}