.as-pin-code-input {
    position: relative;
    display: inline-block;
    box-sizing: border-box;
    user-select: none;
    font-size: inherit;
    --as-pin-code-primary-color: #1e90ff;
    overflow: hidden;
}

.as-pin-code-input-hidden {
    position: absolute;
    right: 0;
    top: 0;
    overflow: hidden;
    background-color: transparent;
    opacity: 0;
    width: 1px;
    padding:0 ;
    height: 1px;
    pointer-events: none;
    color: transparent;
    z-index: -10;
    font-size: 1px;
    box-sizing: border-box;
    /*letter-spacing: 2.4em;*/
    /*padding-left: 0.7em;*/
    /*line-height: 2.5em;*/
    /*position: fixed;*/
    /*z-index: 100;*/
}

/* Hide selection color for hidden input */
.as-pin-code-input-hidden::selection {
    background: transparent !important;
    color: transparent !important;
    opacity: 0 !important;
}
.as-pin-code-input-hidden::-moz-selection {
    background: transparent !important;
    color: transparent !important;
}

.as-pin-code-input-cells-ctn {
    display: flex;
    gap: 0.5em;
    position: relative;
    z-index: 1;
    background-color: white;
}

.as-pin-code-input-cell {
    width: 2.2em;
    height: 2.6em;
    border: 1px solid var(--border-color, #c8c8c8);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1em;
    line-height: 1;
    box-sizing: border-box;
    background: white;
    position: relative;
    overflow: hidden;
}

/* fake caret */
.as-pin-code-input-cell::after {
    content: '';
    position: absolute;
    top: 15%;
    bottom: 15%;
    width: 2px;
    left: 50%;
    background: var(--primary-color);
    opacity: 0;
    pointer-events: none;
}

.as-pin-code-input-cell.as-active::after {
    opacity: 1;
    animation: as-pin-code-input-caret-blink 1s steps(2, end) infinite;
}

/* if cell has a digit, caret should be at the right edge like a normal input */
.as-pin-code-input-cell.as-active.as-filled::after {
    left: calc(50% - 0.6em);
    width: 1.2em;
    top: unset;
    height: 2px;
    transform: none;
}

.as-pin-code-input-cell.as-active.as-filled  .as-pin-code-input-cell-text{
    background-color: rgba(70, 190, 234, 0.5);
}

@keyframes as-pin-code-input-caret-blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* fake selection highlight ("bôi đen") */
.as-pin-code-input-cell::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--as-pin-code-primary-color);
    opacity: 0;
    pointer-events: none;
}

.as-pin-code-input-cell.as-selected::before {
    opacity: 0.22;
}

.as-pin-code-input-cell.as-selected .as-pin-code-input-cell-text {
    color: #fff;
    position: relative;
}

.as-pin-code-input-cell.as-active {
    border-color: var(--as-pin-code-primary-color);
    box-shadow: 0 0 0 2px rgba(30, 144, 255, 0.15);
}

.as-pin-code-input-cell-text {
    font-variant-numeric: tabular-nums;
    padding: 0.2em;
}