#container {
    width: 80%;
    min-width: 1000px;
    margin: 0 auto 0 auto;
}


#left_column {
    float: left;
    width: 15%;
    /* background-color: #fec2c2; */
    box-sizing: border-box;
    padding-right: 10px;

}

.right_column {
    float: right;
    width: 85%;
    min-height: 700px;
    /* background-color: #c2fec2; */
    box-sizing: border-box;
    border-left: solid 2px #8b8b8b;
    padding-left: 10px;
    text-align: center;
}

h1 {
    color: #ad2929
}

.icon {
    width: 100px;
}

#images {
    min-width: 1030px;
    height: 500px;
    /* overflow: scroll; */
}

#images>img {
    width: 200px;
}

#calc input {
    width: 300px;
}

.calc-row button {
    width: 80px;
    height: 80px;
    padding: 10px;
    margin: 1px;
    font-size: 2em;
    color: #3e3e3e;
}

.operator {
    background-color: #c78947;
}

.allClear {
    background-color: #ad2929;
}

video {
    background: #000000;
}


/* ref: https://q-az.net/buruburu-hurueru-css/ */
.shiver {
    animation: hurueru .1s infinite;
}

@keyframes hurueru {
    0% {
        transform: translate(0px, 0px) rotateZ(0deg)
    }

    25% {
        transform: translate(2px, 2px) rotateZ(1deg)
    }

    50% {
        transform: translate(0px, 2px) rotateZ(0deg)
    }

    75% {
        transform: translate(2px, 0px) rotateZ(-1deg)
    }

    100% {
        transform: translate(0px, 0px) rotateZ(0deg)
    }
}


#popup-wrapper {
    background-color: rgba(0, 0, 0, .5);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
}

#popup-inside {
    text-align: center;
    width: 100%;
    max-width: 800px;
    min-height: 300px;
    background: white;
    margin: 10% auto;
    padding: 20px;
    position: relative;
}



#popup-image-block {
    width: 45%;
    height: auto;
    float: left;
}

#popup-image {
    width: 100%;
}

#popup-info {
    width: 100%;
    padding-left: 20px;
}

#close {
    position: absolute;
    top: 0;
    right: 5px;
    cursor: pointer;
    font-size: 1em;
}