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


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


.i-yokoUI__input {
    -o-transition: color .6s linear, box-shadow .3s linear;
    -webkit-appearance: none;
    -webkit-box-shadow: none;
    -webkit-box-sizing: border-box;
    -webkit-transition: color .6s linear, box-shadow .3s linear;
    background: transparent;
    border-bottom: 1px solid var(--i-yokoUI-mainColor);
    border-left: none;
    border-radius: 0;
    border-right: none;
    border-top: none;
    box-shadow: none;
    box-sizing: border-box;
    color: var(--i-yokoUI-mainColor);
    cursor: text;
    outline: none;
    padding: .7em;
    position: relative;
    transition: color .6s linear, box-shadow .3s linear;
    width: 100%;
    z-index: 1;
}

.i-yokoUI__input:hover {
    border-bottom-color: var(--i-yokoUI-hoverColor);
    color: var(--i-yokoUI-hoverColor);
}

.i-yokoUI__input:focus {
    border-bottom-color: var(--i-yokoUI-focusColor);
    color: var(--i-yokoUI-activeTextColor);
}


/*Label*/
.i-yokoUI__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, color;
    -webkit-font-smoothing: antialiased;
    -webkit-touch-callout: none;
    -webkit-transition: all .3s;
    -webkit-transition-property: bottom, font-size, color;
    -webkit-user-select: none;
    bottom: 5px;
    color: var(--i-yokoUI-mainColor);
    left: 0;
    pointer-events: none;
    position: absolute;
    transition: all .3s;
    transition-property: bottom, font-size, color;
    user-select: none;
    width: 100%;
}

.i-yokoUI__input:hover ~ .i-yokoUI__label {
    color: var(--i-yokoUI-hoverColor);
}

.i-yokoUI__input:focus ~ .i-yokoUI__label {
    color: var(--i-yokoUI-focusColor);
}

.i-yokoUI__input:focus ~ .i-yokoUI__label,
.i-yokoUI__input:not([value=""]) ~ .i-yokoUI__label {
    bottom: 110%;
    font-size: small;
}


/*Underline*/
.i-yokoUI__underline {
    -webkit-transition: all .3s cubic-bezier(0.77, 0, 0.175, 1);
    -o-transition: all .3s cubic-bezier(0.77, 0, 0.175, 1);
    transition: all .3s cubic-bezier(0.77, 0, 0.175, 1);
    -webkit-transition-property: height, left, top, width, -webkit-transition-delay;
    -o-transition-property: height, left, top, width, -o-transition-delay;
    transition-property: height, left, top, transition-delay, width, -webkit-transition-delay, -o-transition-delay;
}

.i-yokoUI__underline:before,
.i-yokoUI__underline:after {
    -o-transition: inherit;
    -webkit-transition: inherit;
    content: '';
    position: absolute;
    transition: inherit;
    z-index: 0;
}

.i-yokoUI__underline:before {
    border-bottom: 2px solid var(--i-yokoUI-focusColor);
    border-left: none;
    border-right: none;
    border-top: 2px solid var(--i-yokoUI-focusColor);
    height: 100%;
    left: 50%;
    top: -2px;
    width: 0;
}

.i-yokoUI__underline:after {
    background: var(--i-yokoUI-focusColor);
    bottom: 0;
    height: 0;
    left: 0;
    width: 100%;
}

.i-yokoUI__input:focus ~ .i-yokoUI__underline:before {
    left: 0;
    width: 100%;
}

.i-yokoUI__input:focus ~ .i-yokoUI__underline:after {
    -o-transition-delay: .4s;
    -webkit-transition-delay: .4s;
    height: 100%;
    top: 0;
    transition-delay: .4s;
}


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

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

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

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

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

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

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

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