:root {
    --box-height: 40px;
    --box-border-radius: 20px;
    --box-gap: 5px;
    --box-font-size: 14px;
    --box-transition: width 0.2s ease-out, background-color 1s ease-out;
}

body {
    margin: 0;
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--box-gap);
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    overflow-y: auto;
}

.row {
    display: flex;
    gap: var(--box-gap);
    position: relative;
}

.box {
    height: var(--box-height);
    border: 1px solid;
    border-radius: var(--box-border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Courier New', Courier, monospace; /* System monospace font */
    font-size: var(--box-font-size);
    font-weight: 300; /* Thinner font weight */
    transition: var(--box-transition);
}