img.zoom {
    max-width: 50%;
    height: auto;
    object-fit: scale-down;
}

ul.valid_list {
    border: 2px solid skyblue;
    padding: 5px 20px;
    border-radius: 4px;
}

.navi_bar_style {
    list-style-type: none;
    display: flex;
    max-width: 70%;
    border: 2px solid lightgray;
    border-radius: 4px;
    font-size: 12px;
}

.navi_bar_style ul {
    list-style-type: none;
    display: flex;
}

.navi_bar_style ul li {
    margin-right: 30px;
}

.navi_bar_style ul li a {
    text-decoration: none;
    color: gray;
}

.navi_bar_style form {
    display: flex;
}

.footer_style {
    display: flex;
    max-width: 70%;
    border: 2px solid lightgray;
    border-radius: 4px;
    font-size: 12px;
}

.footer_style a {
    text-decoration: none;
    color: gray;
    font-size: 12px;
    margin-right: 20px;
}