.container{
    width:min(75vw,550px);
    height:min(75vw,550px);

    position:fixed;
    will-change:transform, left, top, right, bottom, width, height;

    border-radius:34px;

    overflow:hidden;

    box-shadow:
        0 35px 90px rgba(0,0,0,.22),
        0 15px 35px rgba(0,0,0,.10);


    transition:
    width 1.4s cubic-bezier(.22,1,.36,1),
    height 1.4s cubic-bezier(.22,1,.36,1),
    left 1.4s cubic-bezier(.22,1,.36,1),
    top 1.4s cubic-bezier(.22,1,.36,1),
    right 1.4s cubic-bezier(.22,1,.36,1),
    bottom 1.4s cubic-bezier(.22,1,.36,1),
    transform 1.4s cubic-bezier(.22,1,.36,1),
    border-radius 1.4s cubic-bezier(.22,1,.36,1);
}

.container:not(.minimized){
    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    /* Выше #dialogueContainer (z-index:4300) — иначе во время интро его
       полноэкранный кликовый перехватчик глушит клики по кусочкам пазла. */
    z-index:4400;
}

/* QR */

.background{

    position:absolute;
    inset:0;

    background-image:url("../images/items/qr.png");

    background-size:42%;
    background-repeat:no-repeat;
    background-position:center;

    z-index:1;

    filter:
        drop-shadow(0 0 12px rgba(255,255,255,.25))
        drop-shadow(0 0 30px rgba(255,255,255,.12));
}

/* СЕТКА */

.grid{

    position:absolute;
    inset:0;

    display:grid;

    grid-template-columns:1fr 1fr;
    grid-template-rows:1fr 1fr;

    z-index:2;
}

/* КВАДРАТЫ */

.piece{

    position:relative;

    display:flex;
    justify-content:center;
    align-items:center;

    border:1px solid rgba(255,255,255,.12);

    overflow:hidden;

    contain:layout paint;
    backface-visibility:hidden;

    transition:
        background .3s,
        transform .3s,
        box-shadow .3s;
}

/* ОТКРЫТАЯ */

.open{

    background:transparent;
}

/* ЗАКРЫТАЯ */

.locked{


    background:rgba(228,224,232,.72);

    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);

    border:1px solid rgba(255,255,255,.28);

    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.30),
        0 6px 22px rgba(0,0,0,.07);

    cursor:pointer;

    transition:
        background .7s ease,
        backdrop-filter .7s ease,
        -webkit-backdrop-filter .7s ease,
        border-color .7s ease,
        box-shadow .7s ease;
}

.locked.unlocking{
    background:transparent;

    backdrop-filter:none;
    -webkit-backdrop-filter:none;

    border-color:transparent;

    box-shadow:none;

    cursor:default;
}

/* НАВЕДЕНИЕ */

.locked:hover{

    background:rgba(255,255,255,.62);

    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.35),
        0 12px 40px rgba(0,0,0,.10);
}

/* ТРЯСКА */

.locked.shake{

    animation:shake .3s;
}

/* ЗАМОК */

.lock-wrap{

    display:flex;
    flex-direction:column;
    align-items:center;
    gap:10px;
}

.locked.unlocking .lock-wrap{
    animation:unlockPiece .7s cubic-bezier(.22,1,.36,1) forwards;
}

.lock{

    font-size:40px;

    transition:.3s;

    filter:
        drop-shadow(0 0 8px rgba(255,255,255,.2))
        drop-shadow(0 4px 10px rgba(0,0,0,.15));
}

.locked:hover .lock{

    transform:scale(1.08);
}

/* ПОДСКАЗКА */

.hint{

    color:white;

    font-size:13px;

    font-weight:500;

    opacity:0;

    transition:.35s;

    white-space:nowrap;

    padding:6px 12px;

    border-radius:10px;

    background:rgba(255,255,255,.10);

    backdrop-filter:none;
}

.hint.show{

    opacity:1;
}

/* НИЖНЯЯ ПАНЕЛЬ */

.footer{

    position:absolute;

    left:50%;
    bottom:20px;

    transform:translateX(-50%);

    padding:12px 22px;

    background:rgba(255,255,255,.12);

    backdrop-filter:blur(18px);

    border:1px solid rgba(255,255,255,.18);

    border-radius:14px;

    color:white;

    font-size:14px;

    font-weight:500;

    z-index:20;
}
/* КНОПКА СВОРАЧИВАНИЯ */

.toggle-btn{

    position:absolute;

    top:15px;
    right:15px;

    width:34px;
    height:34px;

    border:none;

    border-radius:50%;

    background:rgba(255,255,255,.12);

    backdrop-filter:blur(12px);

    color:white;

    cursor:pointer;

    z-index:50;

    transition:.3s;
}

.toggle-btn.is-highlighted{
    background:rgba(255,255,255,.4);
    box-shadow:0 0 0 4px rgba(255,255,255,.25), 0 0 24px rgba(255,255,255,.55);
    animation:settingsPulse 1s ease-in-out infinite alternate;
}

.toggle-btn:hover{

    background:rgba(255,255,255,.22);

    transform:scale(1.1);
}
/* СВЕРНУТОЕ СОСТОЯНИЕ */

.container.minimized{

    width:180px;
    height:180px;

    left:auto;
    top:auto;

    right:18px;
    bottom:18px;

    transform:none;

    border-radius:24px;

    animation:none;

    z-index:1000;
}
/* ПОДПИСЬ СКРЫВАЕМ */

/* Покачивается вся центральная область, а не замки по отдельности. */
.container:not(.minimized){
    animation:swayPuzzle 5.5s ease-in-out infinite;
    transform-origin:center;
    will-change:transform;
}

.unlocked{
    cursor:pointer;
}

.puzzle-toast{
    position:fixed;
    left:50%;
    bottom:82px;

    transform:translate(-50%, 12px);

    padding:10px 16px;

    border:1px solid rgba(255,255,255,.24);
    border-radius:12px;

    background:rgba(50,25,45,.38);
    backdrop-filter:blur(14px);

    color:white;
    font-size:14px;

    opacity:0;
    pointer-events:none;
    transition:opacity .3s ease, transform .3s ease;
    z-index:3000;
}

.puzzle-toast.show{
    opacity:1;
    transform:translate(-50%, 0);
}

.reset-puzzle-btn{
    position:fixed;
    left:50%;
    top:calc(50% + min(37.5vw, 275px) + 24px);

    transform:translateX(-50%);

    padding:10px 16px;

    border:1px solid rgba(255,255,255,.28);
    border-radius:12px;

    background:rgba(255,255,255,.16);
    backdrop-filter:blur(14px);

    color:white;
    font:inherit;
    cursor:pointer;
    transition:background .25s ease, transform .25s ease;
    z-index:100;
}

.reset-puzzle-btn:hover{
    background:rgba(255,255,255,.26);
    transform:translateX(-50%) scale(1.04);
}

@media (prefers-reduced-motion: reduce){
    .container:not(.minimized){
        animation:none;
    }
}

.container.minimized + .footer{

    opacity:0;

    pointer-events:none;
}

.close-btn{

    position:fixed;

    left:calc(50% + 250px);
    top:calc(50% - 250px);

    width:42px;
    height:42px;

    border:none;
    border-radius:50%;

    background:rgba(255,255,255,.18);

    backdrop-filter:blur(18px);

    color:white;

    font-size:24px;

    cursor:pointer;

    transition:.35s;

    z-index:100;
}

.close-btn:hover{

    background:rgba(255,255,255,.28);

    transform:scale(1.08);
}
.close-btn.minimized{

    left:auto;
    top:auto;

    right:10px;
    bottom:10px;
}
.container::after{

    content:"";

    position:absolute;
    inset:0;

    background:
        linear-gradient(
            135deg,
            rgba(255,255,255,.10),
            transparent 40%
        );

    pointer-events:none;
}

.progress-indicator{

    position:fixed;

    right:35px;
    bottom:205px;

    opacity:0;

    transition:.4s;

    padding:8px 14px;

    border-radius:999px;

    background:rgba(255,255,255,.18);

    backdrop-filter:blur(12px);

    color:white;

    font-size:13px;

    font-weight:600;

    z-index:2000;
}

.progress-indicator.show{
    opacity:1;
}
.container.minimized .lock{
    font-size:18px;
}

.container.minimized .hint{
    display:none;
}

.container.minimized .lock-wrap{
    gap:3px;
}

.container.minimized .piece{
    border-width:1px;
}
.container.minimized .background{
    background-size:35%;
}
.toggle-btn{
    z-index:9999;
}