main.css

body {
    font-family: Arial, sans-serif;
    margin: 0 auto;
}

textarea {
    width: 99%;
    min-height: 8vh;
    font-size: 1em;
    overflow: auto;
}

.loading-indicator {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    background: linear-gradient(to right, #FF0000 0%, #FF8000 17%, #FFFF00 33%, #00FF00 50%, #00FFFF 67%, #0080FF 83%, #0000FF 100%);
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.container {
    max-width: 640px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
}

.connection {
    max-width: 640px;
    margin: 10px auto;
    padding: 20px;
    border: 1px solid #ddd;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input {
    width: 400px;
}

.filler {
    flex-grow: 1;
}

.full-img {
    width: 640px;
    height: 640px;
    border: 1px solid #ccc;
    display: flex;
    flex-direction: row;
}

.full-img img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.thumb-bar {
    display: block;
    width: 640px;
    height: 160px;
    /* display: flex; */
    overflow-x: auto;
    border: 1px solid #ccc;
}

.thumb-box {
    width: 160px;
    height: 160px;
    cursor: pointer;
    display: flex;
    border: 1px solid #ccc;
    /* background-color: silver; */
}

.thumb-box img {
    max-width: 100%;
    max-height: 100%;
    min-width: 100%;
    object-fit: contain;
    /* border: #ccc 1px solid;
    background-color: silver; */
}