.backdrop {
    position: fixed;
    inset: 0;
    background: transparent;
    opacity: 0;
    pointer-events: none;
    z-index: 900;
}

.backdrop[data-open="true"] {
    pointer-events: auto;
}

.navdock {
    position: fixed;
    left: calc(16px + env(safe-area-inset-left));
    top:  calc(16px + env(safe-area-inset-top));
    z-index: 1000;
    user-select: none;
}

.burger {
    width: 46px;
    height: 46px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.26);
    background: rgba(80, 80, 81, 0.66);
    box-shadow: 0 18px 60px rgba(0,0,0,.45);
    display: grid;
    place-items: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;

    transition:
        transform 420ms cubic-bezier(.2, 1.15, .2, 1),
        border-color 420ms cubic-bezier(.22, 1, .36, 1),
        background 420ms cubic-bezier(.22, 1, .36, 1),
        box-shadow 420ms cubic-bezier(.22, 1, .36, 1);

    will-change: transform;
}

.burger:hover {
    transform: translateY(-2px) scale(1.015);
    border-color: rgba(255,255,255,.36);
}

.burger:active {
    transform: translateY(0) scale(.985);
}

.icon {
    width: 18px;
    height: 14px;
    position: relative;
}

.icon span {
    position:absolute;
    left:0;
    right:0;
    height: 2px;
    border-radius: 99px;
    background: rgba(255,255,255,.92);
    transform-origin: center;

    transition:
        transform 520ms cubic-bezier(.2, 1.15, .2, 1),
        top 520ms cubic-bezier(.2, 1.15, .2, 1),
        opacity 320ms cubic-bezier(.22, 1, .36, 1),
        width 520ms cubic-bezier(.2, 1.15, .2, 1);

    will-change: transform, top, opacity, width;
}

.icon span:nth-child(1){ top:0; }
.icon span:nth-child(2){ top:6px; opacity:.9; }
.icon span:nth-child(3){ top:12px; width:78%; }

.navdock[data-open="true"] .icon span:nth-child(1) {
    top:6px;
    transform: rotate(45deg);
}
.navdock[data-open="true"] .icon span:nth-child(2) {
    opacity:0;
}
.navdock[data-open="true"] .icon span:nth-child(3) {
    top:6px;
    width:100%;
    transform: rotate(-45deg);
}

.menu {
    position: absolute;
    left: 56px;
    top: 0;

    display: inline-block;
    width: max-content;
    max-width: min(78vw, 360px);
    padding: 10px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,.20);
    background: rgba(20,20,26,.66);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: 0 18px 60px rgba(0,0,0,.45);

    transform: translateY(-10px) scale(.985);
    opacity: 0;
    filter: blur(2px);
    pointer-events: none;

    transition:
        transform 520ms cubic-bezier(.2, 1.15, .2, 1),
        opacity 360ms cubic-bezier(.22, 1, .36, 1),
        filter 520ms cubic-bezier(.22, 1, .36, 1);

    will-change: transform, opacity, filter;
}

.navdock[data-open="true"] .menu {
    transform: translateY(0) scale(1);
    opacity: 1;
    filter: blur(0);
    pointer-events: auto;
}

.menu::before {
    content:"";
    position:absolute;
    left:-7px;
    top:16px;
    width:12px;
    height:12px;
    transform: rotate(45deg);
    background: rgba(20,20,26,.66);
    border-left:1px solid rgba(255,255,255,.20);
    border-bottom:1px solid rgba(255,255,255,.20);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.menu h4 {
    margin: 6px 10px 8px;
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: rgba(255,255,255,.68);
    font-weight: 600;
}

.menu a {
    display:flex;
    align-items:center;
    padding:10px 12px;
    margin:2px;
    border-radius:12px;
    color: rgba(255,255,255,.92);
    text-decoration:none;
    border:1px solid transparent;
    white-space:nowrap;

    transition:
        background 360ms cubic-bezier(.22, 1, .36, 1),
        border-color 360ms cubic-bezier(.22, 1, .36, 1),
        transform 520ms cubic-bezier(.2, 1.15, .2, 1);

    will-change: transform;
}

.menu a:hover {
    background: rgba(255,255,255,.075);
    border-color: rgba(255,255,255,.13);
    transform: translateY(-1px);
}

.menu a:active {
    transform: translateY(0);
}

@media (max-width: 420px) {
    .menu {
        left: 0;
        top: 56px;
        width: min(92vw, 360px);
        max-width: none;
    }

    .menu::before {
        left:16px;
        top:-7px;
        border-left:none;
        border-bottom:none;
        border-right:1px solid rgba(255,255,255,.20);
        border-top:1px solid rgba(255,255,255,.20);
    }
}

@media (hover:none) {
    .burger:hover{ transform:none; }
    .menu a:hover{ transform:none; }
}

@media (prefers-reduced-motion: reduce) {
    *{ transition:none !important; }
    .menu{ filter:none !important; }
}