:root {
    --brand-border-padding: 4px;
    --brand-bg-opacity: 0.4;
}

body {
    background-color: transparent;
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-color: #000;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    
    /* Default for screens up to 960px wide */
    background-image: -webkit-image-set(
        url('../img/bg-img-960.avif') 1x,
        url('../img/bg-img-1920.avif') 2x
    );
    background-image: image-set(
        url('../img/bg-img-960.avif') 1x,
        url('../img/bg-img-1920.avif') 2x
    );
}

.content-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 3rem; /* space-between gap */
    padding: 2rem;
    box-sizing: border-box;
    max-width: 100%;
    margin: auto;
}

.content-container img {
    max-width: 100%;
    height: auto;
}

.content-container .logo-img {
    max-width: 240px;
    background-color: rgba(255, 255, 255, var(--brand-bg-opacity));
    padding: var(--brand-border-padding);
}

.content-container .profound-img {
    border-radius: 8px;
    opacity: 0.7;
}

.text-contact-links {
    font-family: "Lexend Peta", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    text-decoration: none;
    color: #000;
    font-size: 13px;
    text-transform: uppercase;
}

.table-frame {
    background-color: rgba(255, 255, 255, var(--brand-bg-opacity));
    padding: var(--brand-border-padding);
}

.contact-links-table {
    border-collapse: collapse;
    border: 1px solid #000;
}

.contact-links-table td {
    width: 172px;
    height: 40px;
    border: 1px solid #000;
    text-align: center;
    vertical-align: middle;
}

.copy-popover {
    position: absolute;
    background-color: #000;
    color: #fff;
    padding: 10px 16px;
    border-radius: 4px;
    font-family: sans-serif;
    font-size: 13px;
    line-height: 1.4em;
    text-align: center;
    max-width: 340px;
    box-sizing: border-box;
    pointer-events: none;
    z-index: 1000;
    opacity: 0;
    text-transform: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    animation: popover-in 0.4s ease-out forwards;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

@keyframes popover-in {
    from {
        opacity: 0;
        transform: translate(-50%, 15px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

@keyframes popover-out {
    from {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -15px);
    }
}

.copy-popover.fade-out {
    animation: popover-out 0.4s ease-in forwards;
}

@media (max-width: 430px) {
    .content-container {
        padding-block: 2rem;
        padding-inline: 1rem;
    }
}

/* For screens wider than 960px */
@media (min-width: 961px) {
    body::before {
        background-image: -webkit-image-set(
            url('../img/bg-img-1920.avif') 1x,
            url('../img/bg-img-3840.avif') 2x
        );
        background-image: image-set(
            url('../img/bg-img-1920.avif') 1x,
            url('../img/bg-img-3840.avif') 2x
        );
    }
}

/* For screens wider than 1920px */
@media (min-width: 1921px) {
    body::before {
        background-image: -webkit-image-set(
            url('../img/bg-img-3840.avif') 1x
        );
        background-image: image-set(
            url('../img/bg-img-3840.avif') 1x
        );
    }
}