.box.b05 {
  background: #fff }

.b05_3d_roll {
    margin: 0;
    border: 0;
    font-size: 18px;
    position: absolute;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    left: 0;
    right: 0;
    margin: auto;
    width: 200px;
    height: 50px;
    text-align: center;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-user-select: none;
    cursor: default;
    perspective: 500px;
    -webkit-perspective: 500px;
    -moz-perspective: 500px;
}

.b05_3d_roll div {
    position: absolute;
    text-align: center;
    width: 100%;
    height: 50px;
    padding: 10px;
    border: #4f575c solid 3px; border: var(--dark-color) solid 3px;
    pointer-events: none;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
}

.b05_3d_roll div:nth-child(1) {
    color: #4f575c; color: var(--dark-color);
    background-color: #4f575c; background-color: var(--dark-color);
    transform: rotateX(90deg);
    -webkit-transform: rotateX(90deg);
    -moz-transform: rotateX(90deg);
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
    -moz-transition: all 0.2s ease;
    transform-origin: 50% 50% -25px;
    -webkit-transform-origin: 50% 50% -25px;
    -moz-transform-origin: 50% 50% -25px;
}

.b05_3d_roll div:nth-child(2) {
    color: #4f575c; color: var(--dark-color);
    background-color: none;
    transform: rotateX(0deg);
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
    -moz-transition: all 0.2s ease;
    transform-origin: 50% 50% -25px;
    -webkit-transform-origin: 50% 50% -25px;
    -moz-transform-origin: 50% 50% -25px;
}

.b05_3d_roll:hover div:nth-child(1) {
    color: #ffffff;
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
    -moz-transition: all 0.2s ease;
    transform: rotateX(0deg);
    -webkit-transform: rotateX(0deg);
    -moz-transform: rotateX(0deg);
}

.b05_3d_roll:hover div:nth-child(2) {
    background-color: #4f575c; background-color: var(--dark-color)
    transition: all 0.2s ease;
    -webkit-transition: all 0.2s ease;
    -moz-transition: all 0.2s ease;
    transform: rotateX(-90deg);
    -webkit-transform: rotateX(-90deg);
    -moz-transform: rotateX(-90deg);
}



/******** glitch *******/

.box.b12 {
  background: #fff;
}

.b12_3d_glitch {
    width: 200px;
    height: 52px;
    margin: 0;
    border: 0;
    font-size: 18px;
     position: absolute;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    left: 0;
    right: 0;
    margin: auto;
    width: 200px;
    height: 52px;
    text-align: center;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-user-select: none;
    cursor: default;
    overflow: hidden;
}

.b12_3d_glitch div {
    padding: 12px;
    position: absolute;
    text-align: center;
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    width: 200px;
    height: 50px;
}

.b12_3d_glitch div:nth-child(1) {
    top: 1px;
    left: 0px;
    border: #4f575c solid 3px; 
    border: var(--dark-color)solid 3px;
}

.b12_3d_glitch div:nth-child(2) {
    color: #4f575c; color: var(--dark-color);
    left: -100px;
    top: 2px;
    width: 400px;
    height: 50px;
}

.b12_3d_glitch:hover div:nth-child(1) {
    animation: b12_3d_glitch_bg 0.3s linear;
    -webkit-animation: b12_3d_glitch_bg 0.3s linear;
    -moz-animation: b12_3d_glitch_bg 0.3s linear;
    animation-fill-mode: forwards;
    -webkit-animation-fill-mode: forwards;
    -moz-animation-fill-mode: forwards;

}

.b12_3d_glitch:hover div:nth-child(2) {
    color: #000000;
    animation: b12_3d_glitch 0.3s linear;
    -webkit-animation: b12_3d_glitch 0.3s linear;
    -moz-animation: b12_3d_glitch 0.3s linear;
    animation-fill-mode: forwards;
    -webkit-animation-fill-mode: forwards;
    -moz-animation-fill-mode: forwards;
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAGCAYAAAAL+1RLAAAAF0lEQVQIW2NkwAIYgWKS6OIgQQxAoUoAE4AAUnD/0ugAAAAASUVORK5CYII=) repeat;

}

@-webkit-keyframes b12_3d_glitch_bg {
    49.00% {
        background-color: #ffffff;
    }
    50.00% {
        background-color: #4f575c ; background-color: var(--dark-color);
    }
    to {
        background-color: #4f575c ; background-color: var(--dark-color);
    }
}

@-webkit-keyframes b12_3d_glitch {
    from {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #4f575c ; color: var(--dark-color);
    }
    25.00% {
        transform: skewX(80deg);
        -webkit-transform: skewX(80deg);
        -moz-transform: skewX(80deg);
        color: #4f575c ; color: var(--dark-color);
    }
    75.00% {
        transform: skewX(-20deg);
        -webkit-transform: skewX(-20deg);
        -moz-transform: skewX(-20deg);
        color: #ffffff;
    }
    90.00% {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #ffffff;
    }
    to {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #ffffff;
    }
}

@-moz-keyframes b12_3d_glitch_bg {
    49.00% {
        background-color: #ffffff;
    }
    50.00% {
        background-color: #4f575c ; background-color: var(--dark-color);
    }
    to {
        background-color: #4f575c ; background-color: var(--dark-color);
    }
}

@-moz-keyframes b12_3d_glitch {
    from {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #000000;
    }
    25.00% {
        transform: skewX(80deg);
        -webkit-transform: skewX(80deg);
        -moz-transform: skewX(80deg);
        color: #000000;
    }
    75.00% {
        transform: skewX(-20deg);
        -webkit-transform: skewX(-20deg);
        -moz-transform: skewX(-20deg);
        color: #ffffff;
    }
    90.00% {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #ffffff;
    }
    to {
        transform: skewX(0deg);
        -webkit-transform: skewX(0deg);
        -moz-transform: skewX(0deg);
        color: #ffffff;
    }
}