body {
    text-align: center;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #2c3e50, #3498db);
    color: white;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

h1 {
    margin-bottom: 30px;
}

#bulb {
    height: 200px;
    width: 200px;
    border-radius: 50%;
    border: 5px solid white;
    background-color: transparent;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0);
    transition: background-color 0.4s, box-shadow 0.4s;
}

.glow {
    animation: flicker 0.15s infinite;
}

@keyframes flicker {
    0%   { box-shadow: 0 0 50px var(--bulb-color), 0 0 80px var(--bulb-shadow); }
    50%  { box-shadow: 0 0 60px var(--bulb-color), 0 0 120px var(--bulb-shadow); }
    100% { box-shadow: 0 0 50px var(--bulb-color), 0 0 80px var(--bulb-shadow); }
}

button {
    padding: 12px 30px;
    font-size: 18px;
    margin-top: 20px;
    border: none;
    border-radius: 8px;
    background: #ffcc00;
    cursor: pointer;
    font-weight: bold;
    color: #333;
    transition: transform 0.2s, background 0.3s;
}

button:hover {
    background: #ffdb4d;
    transform: scale(1.05);
}

select {
    padding: 8px;
    font-size: 16px;
    margin-top: 20px;
    border-radius: 5px;
    border: none;
}