body {
    height: 100vh;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
        url("https://images.unsplash.com/photo-1483356256511-b48749959172");
    background-size: cover;
    background-position: center;
    text-shadow: 0 0.05rem 0.1rem rgba(0, 0, 0, 0.5);
    box-shadow: inset 0 0 5rem rgba(0, 0, 0, 0.5);
}


.cover-container {
    max-width: 60vw;
    position: relative;
    overflow: hidden;
    background-color: rgba(0, 0, 0, 0.2);
}

/* Spotlight effect */
.spotlight {
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;

    /* Same background image as the main container */
    background: url('https://images.unsplash.com/photo-1483356256511-b48749959172') no-repeat fixed center / cover;
    background-color: rgba(0, 0, 0, 0.7);
    -webkit-mask-image: radial-gradient(circle at var(--mouse-x) var(--mouse-y),
            white 0%,
            transparent 20%);
    mask-image: radial-gradient(circle at var(--mouse-x) var(--mouse-y),
            white 0%,
            transparent 20%);

    pointer-events: none;
    mix-blend-mode: lighten;
    opacity: 0;
    /* Hidden by default */
}

/* Show spotlight on hover */
.cover-container:hover .spotlight {
    opacity: 1;
}

/* Navigation links */
.nav-link {
    padding: 0.25rem 0;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.5);
    margin-left: 1rem;
    border-bottom: 0.25rem solid transparent;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.5);
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.nav-link.active {
    color: white;
    border-bottom-color: white;
}

/* Buttons */
.btn-secondary,
.btn-secondary:hover {
    color: #333;
    text-shadow: none;
}