* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    height: 100%;
    background: radial-gradient(circle, #111, #000);
    font-family: 'Segoe UI', sans-serif;
    color: #ffffff;
    overflow: hidden;
}

#fireworks {
    position: fixed;
    inset: 0;
    z-index: 1;
}

.center {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#year {
    font-size: 2rem;
    opacity: 0.4;
    letter-spacing: 6px;
    margin-bottom: 20px;
}

#countdown-row {
    display: flex;
    align-items: center;
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 600;
}

#countdown-row span {
    min-width: 2ch;
    text-align: center;
}

.sep {
    opacity: 0.4;
    margin: 0 12px;
}

#labels {
    margin-top: 12px;
    font-size: 0.8rem;
    letter-spacing: 2px;
    opacity: 0.6;
}