html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #f2f2f2;
    display: flex;
    justify-content: center;
    align-items: center;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#clock-container {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    font-family: 'Onest', sans-serif;
    font-weight: 600;
    font-size: 12vw;
    color: #2c2c2c;
    perspective: 1200px;
}

.unit-group {
    display: flex;
}

.digit-container {
    position: relative;
    width: 0.65em; 
    height: 1.2em;
    overflow: hidden;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

.digit {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
    line-height: 1.2em;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s;
    backface-visibility: hidden;
}

.digit.active {
    opacity: 1;
    transform: translateZ(0) translateY(0) rotateX(0deg);
}

.digit.exit {
    opacity: 0;
    transform: translateZ(-250px) scale(0.6);
}

.digit.enter {
    opacity: 0;
    transform: translateY(100%) rotateX(-60deg);
}

.separator {
    width: 0.3em;
    display: flex;
    justify-content: center;
    padding-bottom: 0.1em;
}