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


.i-naoUI {
    border: none;
    overflow: hidden;
    padding: 1em 0 0 0;
    position: relative;
}


.i-naoUI__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-naoUI-mainColor);
    cursor: text;
    outline: none;
    padding: .8em;
    width: 100%;
}

.i-naoUI__input:hover {
    color: var(--i-naoUI-hoverColor);
}

.i-naoUI__input:hover ~ .i-naoUI__underline {
    stroke: var(--i-naoUI-hoverColor);
}

.i-naoUI__input:focus {
    color: var(--i-naoUI-activeTextColor);
}


/*Label*/
.i-naoUI__label {
    -o-transition: all .3s ease;
    -o-transition-property: bottom, font-size;
    -webkit-transition: all 300ms ease;
    -webkit-transition-property: bottom, font-size;
    bottom: 5px;
    color: var(--i-naoUI-mainColor);
    left: 0;
    pointer-events: none;
    position: absolute;
    transition: all .3s ease;
    transition-property: bottom, font-size;
}

.i-naoUI__input:hover ~ .i-naoUI__label {
    color: var(--i-naoUI-hoverColor);
}

.i-naoUI__input:focus ~ .i-naoUI__label {
    color: var(--i-naoUI-focusColor);
}

.i-naoUI__input:focus ~ .i-naoUI__label,
.i-naoUI__input:not([value=""]) ~ .i-naoUI__label {
    bottom: 65%;
    font-size: small;
}


/*Underline*/
.i-naoUI__underline {
    -webkit-transition-timing-function: cubic-bezier(0, .25, .5, 1);
    -webkit-transition: -webkit-transform .7s, stroke .7s;
    fill: none;
    left: 0;
    pointer-events: none;
    position: absolute;
    stroke: var(--i-naoUI-mainColor);
    top: 2px;
    transition-timing-function: cubic-bezier(0, .25, .5, 1);
    transition: transform 0.7s, stroke .7s;
}

.i-naoUI__input:focus ~ .i-naoUI__underline {
    -webkit-transform: translate3d(-66.6%, 0, 0);
    stroke: var(--i-naoUI-focusColor);
    transform: translate3d(-66.6%, 0, 0);
}


/*Placeholder*/
.i-naoUI__input::-webkit-input-placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

.i-naoUI__input:-ms-input-placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

.i-naoUI__input::-ms-input-placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

.i-naoUI__input::placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

.i-naoUI__input::-webkit-input-placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

.i-naoUI__input::-ms-input-placeholder {
    -webkit-transition: color 1s ease;
    -o-transition: color 1s ease;
    transition: color 1s ease;
}

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

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

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


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

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

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

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