@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

.side-nav {
    --nav-neutral: color-mix(in srgb, var(--text) 85%, transparent);
    --nav-hover: var(--text);
    --nav-active: var(--accent-color2);
    --nav-cell: 52px;
    position: fixed;
    left: 12px;
    top: 50%;
    z-index: 500;
    transform: translateY(-50%);
    padding: 16px 6px;
    border-radius: 26px;
    background: color-mix(in srgb, var(--page-bg) 55%, transparent);
    border: 1px solid var(--border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.side-nav-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.side-nav-item {
    --scroll-d: 0;
    --hover-d: 9;
    --d: min(var(--scroll-d), var(--hover-d));
    width: 44px;
    height: var(--nav-cell);
}

.side-nav-button {
    position: relative;
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    padding: 0;
    font: inherit;
    font-size: 0.9375rem;
    color: var(--nav-neutral);
    background: none;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: color 250ms ease;
}

.side-nav-item.is-hovered .side-nav-button {
    color: var(--nav-hover);
}

.side-nav-item.is-active .side-nav-button {
    color: var(--nav-active);
}

.side-nav-icon {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    transform: scale(calc(1.15 - min(var(--d), 3) * .1));
    opacity: calc(1 - min(var(--d), 3) * .14);
    transition: transform 250ms ease, opacity 250ms ease;
}

.side-nav-label {
    font-family: var(--font-label);
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    white-space: nowrap;
    color: var(--text);
    text-shadow: 0 1px 4px color-mix(in srgb, var(--hero-page-bg) 90%, transparent), 0 0 2px color-mix(in srgb, var(--hero-page-bg) 90%, transparent);
    opacity: 0;
    pointer-events: none;
    transform: translate(-8px, -50%);
    transition: opacity 200ms ease, transform 200ms ease;
}

.side-nav-button:hover .side-nav-label,
.side-nav-button:focus-visible .side-nav-label {
    opacity: 1;
    transform: translate(0, -50%);
}

.side-nav-button:focus-visible {
    outline: 2px solid var(--accent-color2);
    outline-offset: -2px;
}

@media (prefers-reduced-motion: reduce) {
    .side-nav-button,
    .side-nav-icon,
    .side-nav-label {
        transition: none;
    }
}

@media (max-width: 1359px) {
    body {
        padding-bottom: 64px;
    }

    .side-nav {
        --nav-cell: 44px;
        left: 50%;
        top: auto;
        bottom: 8px;
        transform: translateX(-50%);
        max-width: calc(100% - 16px);
        padding: 4px 6px;
        border-radius: 26px;
    }

    .side-nav-list {
        flex-direction: row;
        gap: 0;
    }

    .side-nav-label {
        display: none;
    }
}