.topnav {
    background-color: var(--glass-light-solid);
    background-image: var(--glass-reflection);
    box-shadow: var(--glass-shadow);
}

.topnav nav {
    padding: var(--s-xxxs);
    border: var(--border-width) solid var(--glass-edge-bright);
    border-radius: var(--glass-radius);
    background: rgb(255 255 255 / 0.18);
    box-shadow: inset 0 var(--border-width) var(--s-xxs) rgb(255 255 255 / 0.3);
}

.topnav nav a,
.topnav nav p {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--s-xl);
    padding: var(--s-xxs) var(--s-sm);
    border: var(--border-width) solid transparent;
    border-radius: var(--glass-radius);
    transition: background-color var(--duration-glass),
        border-color var(--duration-glass),
        box-shadow var(--duration-glass),
        transform var(--duration-control) var(--ease-glass);
}

.topnav nav [aria-current] {
    border-color: var(--glass-edge-bright);
    background: rgb(255 255 255 / 0.62);
    box-shadow: inset 0 var(--border-width) 0 rgb(255 255 255 / 0.8), 0 var(--s-xxxs) var(--s-xs) rgb(25 35 28 / 0.12);
    font-weight: 700;
}

.topnav nav a:hover,
.topnav nav a:focus-visible {
    background-color: rgb(255 255 255 / 0.52);
    border-color: var(--glass-edge-bright);
}

.topnav nav a:active {
    transform: scale(var(--glass-press-scale));
}

.button {
    position: relative;
    isolation: isolate;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-md);
    max-width: 100%;
    min-height: calc(var(--s-xl) + var(--s-sm));
    padding: var(--s-sm) var(--s-lg);
    overflow: hidden;
    border: var(--border-width) solid var(--glass-edge-bright);
    border-radius: var(--glass-radius);
    color: var(--ink);
    background-color: var(--glass-light-solid);
    background-image: var(--glass-reflection);
    box-shadow: var(--glass-shadow);
    text-decoration: none;
    transition: transform var(--duration-control) var(--ease-glass),
        box-shadow var(--duration-glass) var(--ease-glass),
        border-color var(--duration-glass),
        background-color var(--duration-glass);
}

.button::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    border-radius: inherit;
    background: linear-gradient(110deg, transparent 20%, rgb(255 255 255 / 0.16) 50%, transparent 80%);
    opacity: 0;
    transform: translateX(-100%);
    pointer-events: none;
    transition: transform calc(var(--duration-glass) * var(--golden-ratio)) var(--ease-glass),
        opacity var(--duration-glass);
}

.button::after {
    content: "";
    position: absolute;
    inset: var(--border-width);
    border-radius: inherit;
    box-shadow: inset 0 var(--border-width) var(--s-xxs) rgb(255 255 255 / 0.18);
    pointer-events: none;
}

.button>span[aria-hidden="true"] {
    flex-shrink: 0;
    transition: transform var(--duration-control) var(--ease-glass);
}

.button:focus-visible {
    border-color: var(--glass-edge-bright);
    box-shadow: var(--glass-shadow-raised);
    outline-color: var(--text-main);
}

.button:focus-visible::before {
    opacity: 0.7;
    transform: translateX(30%);
}

@media (hover: hover) and (pointer: fine) {

    .button:hover,
    .thumbnail:hover,
    .preview:hover {
        transform: translateY(calc(var(--s-xxs) * -1));
        border-color: var(--glass-edge-bright);
        box-shadow: var(--glass-shadow-raised);
        text-decoration: none;
    }

    .button:hover::before {
        opacity: 0.7;
        transform: translateX(30%);
    }

    .button:hover>span[aria-hidden="true"] {
        transform: translate(var(--s-xxs), calc(var(--s-xxs) * -1));
    }
}

.button:active,
.thumbnail:active,
.preview:active {
    transform: translateY(var(--s-xxxs)) scale(var(--glass-press-scale));
    box-shadow: inset 0 var(--border-width) var(--s-xs) rgb(0 0 0 / 0.2), 0 var(--s-xxxs) var(--s-xs) rgb(0 0 0 / 0.15);
    transition-duration: calc(var(--duration-control) / var(--golden-ratio));
}

.button:active>span[aria-hidden="true"] {
    transform: none;
}

.thumbnail,
.preview {
    border-color: var(--glass-edge);
    box-shadow: 0 var(--s-xs) var(--s-xl) rgb(0 0 0 / 0.18);
    transition: transform var(--duration-control) var(--ease-glass),
        box-shadow var(--duration-glass) var(--ease-glass),
        border-color var(--duration-glass);
}

.thumbnail:focus-visible,
.preview:focus-visible {
    border-color: var(--glass-edge-bright);
    box-shadow: var(--glass-shadow-raised);
    outline-color: var(--text-main);
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {

    .topnav,
    .button {
        background-color: var(--glass-light-tint);
        -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--golden-ratio));
        backdrop-filter: blur(var(--glass-blur)) saturate(var(--golden-ratio));
    }
}

@media (prefers-reduced-transparency: reduce),
(prefers-contrast: more) {
    :root {
        --glass-dark-tint: var(--glass-dark-solid);
        --glass-light-tint: var(--glass-light-solid);
        --glass-edge: var(--text-dim);
    }

    .topnav,
    .button {
        background-image: none;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .button::before,
    .button::after {
        display: none;
    }
}

@media (forced-colors: active) {

    .topnav,
    .topnav nav,
    .topnav nav a,
    .topnav nav p,
    .button {
        color: CanvasText;
        background: Canvas;
        border-color: ButtonText;
        box-shadow: none;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .topnav nav [aria-current] {
        outline: var(--border-width) solid Highlight;
    }

    .button::before,
    .button::after {
        display: none;
    }
}

@media print {

    .topnav,
    .topnav nav,
    .button {
        background: none;
        box-shadow: none;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .button::before,
    .button::after {
        display: none;
    }
}