@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&family=Raleway:ital,wght@0,100..900;1,100..900&display=swap');

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", serif;
    font-weight: 700;
    font-style: normal;
    text-align: center;
}

html{
    height: 100%;
    width: 100%;
}

body {
    background: linear-gradient(rgba(0,0,0,0.8),rgba(0,0,0,0.8)),url("https://images4.alphacoders.com/211/211724.jpg");
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

h1 {
    margin-top: 50px;
    color: whitesmoke;
    margin-bottom: 10%;
    font-size: 2.8rem;
    text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.2);
    letter-spacing: 1px;
}

.bulb-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
}

img.bulb {
    cursor: pointer;
    transition: filter 0.4s, box-shadow 0.4s, transform 0.4s;
    filter: brightness(50%);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    -webkit-tap-highlight-color: transparent; 
}

img.bulb:hover{
    transform: scale(1.1);
}

.bulb.on {
    filter: drop-shadow(1px 1px 10px #ffeb3b);
}

.binary-label {
    font-family: 'Poppins', serif;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.output {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 8%;
    color: whitesmoke;
    flex-direction: column;
    font-size: 1.6rem;
    text-align: center;
}