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


.i-mUI {
    border: none;
    padding: 0;
    position: relative;
}


.i-mUI__input {
    -o-transition: box-shadow .3s;
    -webkit-appearance: none;
    -webkit-box-shadow: none;
    -webkit-box-sizing: border-box;
    -webkit-transition: -webkit-box-shadow .3s;
    background: transparent;
    border-bottom: 1px solid var(--i-mUI-mainColor);
    border-left: none;
    border-radius: 0;
    border-right: none;
    border-top: none;
    box-shadow: none;
    box-sizing: border-box;
    color: var(--i-mUI-mainColor);
    cursor: text;
    outline: none;
    padding: .7em;
    transition: -webkit-box-shadow .3s;
    transition: box-shadow .3s;
    width: 100%;
}

.i-mUI__input:hover {
    border-bottom-color: var(--i-mUI-hoverColor);
    color: var(--i-mUI-hoverColor);
}

.i-mUI__input:focus {
    color: var(--i-mUI-activeTextColor);
}


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

.i-mUI__input:hover ~ .i-mUI__label {
    color: var(--i-mUI-hoverColor);
}

.i-mUI__input:focus ~ .i-mUI__label {
    color: var(--i-mUI-focusColor);
}

.i-mUI__input:focus ~ .i-mUI__label,
.i-mUI__input:not([value=""]) ~ .i-mUI__label {
    bottom: 100%;
    font-size: small;
}


/*Underline*/
.i-mUI__underline {
    -ms-transform: scaleX(0);
    -o-transition: transform .3s ease-out;
    -webkit-transform: scaleX(0);
    -webkit-transition: transform .3s ease-out;
    background: var(--i-mUI-focusColor);
    border: none;
    bottom: 0;
    content: '';
    display: block;
    font-size: 1px;
    height: 2px;
    left: 0;
    margin: 0;
    padding: 0;
    position: absolute;
    transform: scaleX(0);
    transition: transform .3s ease-out;
    width: 100%;
    z-index: 9;
}

.i-mUI__input:focus ~ .i-mUI__underline {
    -ms-transform: scaleX(1);
    -webkit-transform: scaleX(1);
    transform: scaleX(1);
}


/*Placeholder*/
.i-mUI__input::-webkit-input-placeholder {
    -o-transition: color .3s ease;
    -webkit-transition: color .3s ease;
    transition: color .3s ease;
}

.i-mUI__input:-ms-input-placeholder {
    -webkit-transition: color .3s ease;
    -o-transition: color .3s ease;
    transition: color .3s ease;
}

.i-mUI__input::-ms-input-placeholder {
    -webkit-transition: color .3s ease;
    -o-transition: color .3s ease;
    transition: color .3s ease;
}

.i-mUI__input::placeholder {
    -webkit-transition: color .3s ease;
    -o-transition: color .3s ease;
    transition: color .3s ease;
}

.i-mUI__input::-webkit-input-placeholder {
    -webkit-transition: color .3s ease;
    -o-transition: color .3s ease;
    transition: color .3s ease;
}

.i-mUI__input::-ms-input-placeholder {
    -webkit-transition: color .3s ease;
    -o-transition: color .3s ease;
    transition: color .3s ease;
}

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

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

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

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

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

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

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