body {
    background-color: #0a0a0a;
    color: #00ff41;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    text-transform: uppercase;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

h1 {
    font-size: 2rem;
    letter-spacing: 0.5rem;
    margin: 0;
    text-shadow: 0 0 10px #00ff41;
}

.clock-grid {
    display: flex;
    gap: 3rem;
}

.time-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.label {
    font-weight: bold;
    font-size: 1rem;
}

.digits {
    display: flex;
    gap: 1rem;
}

.column {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bit {
    width: 30px;
    height: 30px;
    border: 2px solid #00ff41;
    border-radius: 4px;
    transition: background-color 0.2s, box-shadow 0.2s;
    background-color: transparent;
}

.bit.on {
    background-color: #00ff41;
    box-shadow: 0 0 15px #00ff41;
}

.digital-readout {
    font-size: 3rem;
    font-weight: bold;
    text-shadow: 0 0 10px #00ff41;
}

@media (max-width: 600px) {
    .clock-grid {
        flex-direction: column;
        gap: 2rem;
    }
}