:root {
    --i-kuroUI-activeTextColor: #101010;
    --i-kuroUI-focusColor: #2196f3;
    --i-kuroUI-hoverColor: #252525;
    --i-kuroUI-mainColor: #727272;
}


.i-kuroUI {
    border-bottom: none;
    border-left: none;
    border-right: none;
    border-top: 2px solid var(--i-kuroUI-focusColor);
    overflow: hidden;
    padding: 0;
    position: relative;
}


.i-kuroUI__input {
    -webkit-appearance: none;
    -webkit-box-shadow: none;
    -webkit-box-sizing: border-box;
    background: transparent;
    border-radius: 0;
    border: none;
    box-shadow: none;
    box-sizing: border-box;
    color: var(--i-kuroUI-mainColor);
    cursor: text;
    outline: none;
    padding: .7em;
    position: relative;
    width: 100%;
    z-index: 1;
}

.i-kuroUI__input:hover {
    color: var(--i-kuroUI-hoverColor);
}

.i-kuroUI__input:focus {
    color: var(--i-kuroUI-activeTextColor);
}


/*Label & Legend*/
.i-kuroUI__label {
    -khtml-user-select: none;
    -moz-osx-font-smoothing: grayscale;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-transition: all .3s;
    -o-transition-property: bottom, font-size, margin-left, font-weight;
    -webkit-font-smoothing: antialiased;
    -webkit-touch-callout: none;
    -webkit-transition: all .3s;
    -webkit-transition-property: bottom, font-size, margin-left, font-weight;
    -webkit-user-select: none;
    bottom: 5px;
    color: var(--i-kuroUI-mainColor);
    left: 0;
    pointer-events: none;
    position: absolute;
    transition: all .3s;
    transition-property: bottom, font-size, margin-left, font-weight;
    user-select: none;
}

.i-kuroUI__input:hover ~ .i-kuroUI__label {
    color: var(--i-kuroUI-hoverColor);
}

.i-kuroUI__input:focus ~ .i-kuroUI__label {
    color: var(--i-kuroUI-focusColor);
}

.i-kuroUI__input:focus ~ .i-kuroUI__label,
.i-kuroUI__input:not([value=""]) ~ .i-kuroUI__label {
    bottom: 70%;
    font-size: small;
    font-weight: bold;
    margin-left: 1em;
}

.i-kuroUI__legend {
    font-size: small;
    font-weight: bold;
    min-width: 100%;
    padding: 0 .3em;
    transition: all .3s;
    transition-property: min-width, margin-left;
    visibility: hidden;
}

.i-kuroUI__input:focus ~ .i-kuroUI__legend {
    margin-left: .7em;
    min-width: 1%;
}


/*Underline*/
.i-kuroUI__underline {
    background: transparent;
    border-bottom: 1px solid var(--i-kuroUI-mainColor);
    border-left: 2px solid var(--i-kuroUI-focusColor);
    border-right: 2px solid var(--i-kuroUI-focusColor);
    border-top: none;
    bottom: 0;
    box-sizing: border-box;
    content: '';
    display: block;
    font-size: 1px;
    height: 1px;
    left: 0;
    margin: 0;
    padding: 0;
    position: absolute;
    transition: all .3s;
    transition-property: height, border-bottom;
    width: 100%;
    z-index: 0;
}

.i-kuroUI__input:hover ~ .i-kuroUI__underline {
    border-bottom-color: var(--i-kuroUI-hoverColor);
}

.i-kuroUI__input:focus ~ .i-kuroUI__underline {
    border-bottom: 2px solid var(--i-kuroUI-focusColor);
    height: 90%;
}


/*Placeholder*/
.i-kuroUI__input::-webkit-input-placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input:-ms-input-placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input::-ms-input-placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input::placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input::-webkit-input-placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input::-ms-input-placeholder {
    -webkit-transition: color .2s;
    -o-transition: color .2s;
    transition: color .2s;
}

.i-kuroUI__input:not(:focus)::-webkit-input-placeholder {
    color: transparent;
}

.i-kuroUI__input:not(:focus):-ms-input-placeholder {
    color: transparent;
}

.i-kuroUI__input:not(:focus)::-ms-input-placeholder {
    color: transparent;
}


.i-kuroUI__input:not(:focus)::placeholder {
    color: transparent;
}

.i-kuroUI__input:not(:focus)::-webkit-input-placeholder {
    color: transparent;
}

.i-kuroUI__input:not(:focus)::-ms-input-placeholder {
    color: transparent;
}

.i-kuroUI__input:not(:focus)::-moz-placeholder {
    color: transparent;
}