:root {
    --i-ichiroUI-activeTextColor: #f2f2f2;
    --i-ichiroUI-focusColor: #2196f3;
    --i-ichiroUI-hoverColor: #252525;
    --i-ichiroUI-mainColor: #727272;
}


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


.i-ichiroUI__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-ichiroUI-mainColor);
    cursor: text;
    outline: none;
    padding: .7em;
    position: relative;
    width: 100%;
    z-index: 1;
}

.i-ichiroUI__input:hover {
    color: var(--i-ichiroUI-hoverColor);
}

.i-ichiroUI__input:focus {
    color: var(--i-jiroUI-activeTextColor);
}


/*Label*/
.i-ichiroUI__label {
    -khtml-user-select: none;
    -moz-osx-font-smoothing: grayscale;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-transition: all .3s ease-out;
    -o-transition-property: bottom, font-size, color;
    -webkit-font-smoothing: antialiased;
    -webkit-touch-callout: none;
    -webkit-transition: all .3s ease-out;
    -webkit-transition-property: bottom, font-size, color;
    -webkit-user-select: none;
    bottom: 5px;
    color: var(--i-ichiroUI-mainColor);
    left: 0;
    pointer-events: none;
    position: absolute;
    transition: all .3s ease-out;
    transition-property: bottom, font-size, color;
    user-select: none;
    width: 100%;
}

.i-ichiroUI__input:hover ~ .i-ichiroUI__label {
    color: var(--i-ichiroUI-hoverColor);
}

.i-ichiroUI__input:focus ~ .i-ichiroUI__label {
    color: var(--i-ichiroUI-focusColor);
}

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


/*Underline*/
.i-ichiroUI__underline {
    -o-transition: all .3s ease-out;
    -o-transition-property: height, background;
    -webkit-transition: all .3s ease-out;
    -webkit-transition-property: height, background;
    background: var(--i-ichiroUI-mainColor);
    border-radius: 4px;
    border: none;
    bottom: 0;
    content: '';
    display: block;
    font-size: 1px;
    height: 1px;
    left: 0;
    margin: 0;
    padding: 0;
    position: absolute;
    transition: all .3s ease-out;
    transition-property: height, background;
    width: 100%;
    z-index: 0;
}

.i-ichiroUI__input:hover ~ .i-ichiroUI__underline {
    background: var(--i-ichiroUI-hoverColor);
}

.i-ichiroUI__input:focus ~ .i-ichiroUI__underline {
    background: var(--i-ichiroUI-focusColor);
    height: 100%;
}


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

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

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

.i-ichiroUI__input::placeholder {
    -webkit-transition: color .3s ease-in-out;
    -o-transition: color .3s ease-in-out;
    transition: color .3s ease-in-out;
}

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

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

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

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

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


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

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

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

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