:root {
    --count: 5;
    --radius: 6rem;
    --toggle-size: 4rem;
    --item-size: 3.5rem;
    --gap: 0.4rem;
    --bg: #f4f5f7;
    --fg: #2c2f36;
    --muted: rgba(0, 0, 0, 0.05);
    --shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
    --duration: 200ms;
    --offset: -0.25turn; 
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "JetBrains Mono", sans-serif;
}

html,
body {
    height: 100%;
}

body {
    background-color: var(--bg);
    color: var(--fg);
    display: grid;
    place-items: center;
}

nav.menu {
    position: relative;
    width: max(var(--toggle-size), var(--radius) * 2 + var(--item-size));
    height: max(var(--toggle-size), var(--radius) * 2 + var(--item-size));
    display: grid;
    place-content: center;
}

nav label {
    width: var(--toggle-size);
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all var(--duration) ease;
    position: relative;
    z-index: 2;
    user-select: none;
}

nav label:active {
    transform: scale(0.94);
}

.burger {
    width: 40%;
    display: flex;
    flex-direction: column;
    position: relative;
    gap: var(--gap);
}

.burger span {
    display: block;
    height: 3px;
    border-radius: 2px;
    background: black;
    transition: all var(--duration) ease;
}

ul.menu-list {
    list-style: none;
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    transform: rotate(-90deg);
    transition: all calc(var(--duration) * 1.5) ease;
}

ul.menu-list li {
    position: absolute;
    top: 50%;
    left: 50%;
    width: var(--item-size);
    height: var(--item-size);
    aspect-ratio: 1;
    transform: translate(-50%, -50%)
        rotate(calc((var(--i) * 1turn / var(--count)) + var(--offset))) translate(0)
        rotate(calc(-1 * var(--i) * 1turn / var(--count)));
    transform-origin: center center;
    opacity: 0;
    transition: inherit;
}

ul.menu-list a {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: var(--shadow);
    text-decoration: none;
    color: inherit;
    outline: none;
    will-change: transform;
    transition: transform var(--duration) ease;
}

ul.menu-list a::before {
    content: "";
    position: absolute;
    inset: -1px;
    padding: 10px;
    background: linear-gradient(
        to right bottom,
        var(--muted),
        transparent,
        var(--muted)
    );
    z-index: -1 !important;
    border-radius: 50%;
}

ul.menu-list a:focus-visible {
    box-shadow:
        0 0 0 3px rgba(59, 130, 246, 0.35),
        var(--shadow);
}

ul.menu-list a:hover {
    transform: scale(1.1);
    filter: brightness(1.03);
}

span.icon {
    width: 100%;
    height: 100%;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
}

span.icon img {
    width: 50%;
    height: 50%;
}

#toggle:checked ~ ul.menu-list li {
    transform: translate(-50%, -50%)
        rotate(calc((var(--i) * 1turn / var(--count)) + var(--offset))) translate(var(--radius))
        rotate(calc(-1 * var(--i) * 1turn / var(--count)));
    opacity: 1;
}

#toggle:checked ~ ul.menu-list {
    transform: rotate(0);
}

#toggle:checked ~ ul.menu-list a {
    transform: rotate(.25turn);
}

#toggle:checked + label .burger span:nth-child(1) {
    transform: translateY(calc(var(--gap) + 100%)) rotate(.125turn);
}
#toggle:checked + label .burger span:nth-child(2) {
    opacity: 0;
}
#toggle:checked + label .burger span:nth-child(3) {
    transform: translateY(calc(-1 * var(--gap) - 100%))  rotate(-.125turn);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* Reduces motion for users who are sensitive to animation */
@media (prefers-reduced-motion: reduce) {
    ul.menu-list li,
    label .burger span {
        transition: none !important;
    }
}