:root {
    --digit-font-size: 3em;
    --digit-height: 1.3em;
    --digit-width: 0.8em;
    --label-font-size: 0.7em;
    --transition-speed: 0.5s;
    --digit-bg: #3a3a3a;
    --digit-color: #f0f0f0;
    --label-color: #a0a0a0;
    --unit-gap: 25px;
    --digit-gap: 6px;
    --border-radius: 8px;
    --transition-timing-function: ease-in-out;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #282828;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    overflow: hidden;
    color: var(--digit-color);
}

.countdown-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-title {
    font-size: 2em;
    font-weight: 300;
    color: var(--digit-color);
    margin-bottom: 30px;
    letter-spacing: 1px;
}

#countdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--unit-gap);
    text-align: center;
}

.time-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.digits {
    display: flex;
    gap: var(--digit-gap);
    background-color: var(--digit-bg);
    padding: 12px 15px;
    border-radius: var(--border-radius);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2), 0 3px 6px rgba(0, 0, 0, 0.3);
    margin-bottom: 8px;
}

.digit {
    display: inline-block;
    height: var(--digit-height);
    width: var(--digit-width);
    overflow: hidden;
    position: relative;
    font-size: var(--digit-font-size);
    font-weight: 600;
}

.digit-roller {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform var(--transition-speed) var(--transition-timing-function);
    will-change: transform;
}

.digit-roller .num {
    display: flex;
    justify-content: center;
    align-items: center;
    height: var(--digit-height);
    width: 100%;
    color: var(--digit-color);
}

.label {
    font-size: var(--label-font-size);
    color: var(--label-color);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 300;
}