assets/css/hoshi.css
.input--hoshi {
    position: relative;
    /*z-index: 1;*/
    display: inline-block;


    width: calc(100% - 2em);
    vertical-align: top;
    overflow: hidden;
}



.input__field--hoshi {
    position: relative;
    display: block;
    float: right;
    border: none;
    border-radius: 0;


    -webkit-appearance: none;


    padding: 0.85em 0.15em;
    width: 100%;
    background: transparent;
    /*color: #595F6E;*/
}

.input__field--hoshi:focus {
    outline: none;
}

.input__label--hoshi {
    display: inline-block;
    float: right;
    /*color: #6a7989;*/
    font-weight: bold;
    font-size: 70.25%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    position: absolute;
    bottom: 0;
    left: 0;
    padding: 0 0.25em;
    width: 100%;
    height: calc(100% - 1em);
    text-align: left;
    pointer-events: none;
}



.input__label--hoshi:before,
.input__label--hoshi:after {

    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 10px);
    border-bottom: 1px solid #B9C1CA;
}

.input__label--hoshi:after {

    margin-top: 2px;
    border-bottom: 4px solid red;
    -webkit-transform: translate3d(-100%, 0, 0);
    transform: translate3d(-100%, 0, 0);
    -webkit-transition: -webkit-transform 0.3s;
    transition: transform 0.3s;
}

.input__field--hoshi:focus+.input__label--hoshi::after,
.input--filled .input__label--hoshi::after {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.input__field--hoshi:focus+.input__label--hoshi .input__label-content--hoshi,
.input--filled .input__label-content--hoshi {
    -webkit-animation: anim-1 0.3s forwards;
    animation: anim-1 0.3s forwards;
}




.hoshi-color-4::after {
    border-color: #275b62;
}