styles.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
}

.nav-link {
    display: block;
    text-align: center;
    margin-top: 1rem;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 14px;
    font-weight: bold;
    color: #000;
}

.container {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 80%;
    max-width: 640px;
    margin: 3rem auto;
}

.video-container {
    position: relative;
}

.container .buttons {
    display: flex;
    flex-direction: row;
    margin-top: 1rem;
}

.container .buttons button {
    width: 120px;
    padding: 0.25rem;
    cursor: pointer;
    margin: 0 0.25rem;
}

video {
    width: 100%;
}

.capture-overlay {
    background: #ccc;
    width: 100%;
    top: 0;
    bottom: 0;
    position: absolute;
    visibility: visible;
    opacity: 0;
    transition: all 0.1s ease;
}

.capture-overlay.show {
    visibility: visible;
    opacity: 1;
}

.error-container {
    margin: 6rem auto;
    display: none;
    justify-content: center;
}

/* Loader */
.loader {
    background: #fff;
    width: 100%;
    top: 0;
    bottom: 0;
    position: fixed;
    z-index: 1;
    display: none;
    align-items: center;
    justify-content: center;
}

.lds-dual-ring {
    display: inline-block;
    width: 80px;
    height: 80px;
}

.lds-dual-ring:after {
    content: " ";
    display: block;
    width: 64px;
    height: 64px;
    margin: 8px;
    border-radius: 50%;
    border: 6px solid #fff;
    border-color: rgb(54, 11, 211) transparent rgb(54, 11, 211) transparent;
    animation: lds-dual-ring 1.2s linear infinite;
}

@keyframes lds-dual-ring {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
}

.show {
    display: flex;
}

.image-list {
    text-align: center;
    margin: 4rem auto;
}


table {
    width: 80%;
    max-width: 800px;
    text-align: center;
    margin: 3rem auto;
}

table th,
table td {
    border-bottom: 1px solid #ccc;
    padding: 0.5rem;
}

table button {
    cursor: pointer;
    padding: 0.125rem 1rem;
}