.memory-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 18px;
    min-height: 100vh;
    padding: 18px;
}

.memory-panel,
.memory-finish-card {
    border: 1px solid var(--line);
    background: rgba(24, 29, 36, .94);
    box-shadow: 0 16px 50px rgba(0, 0, 0, .22);
}

.memory-panel {
    display: grid;
    grid-template-rows: auto auto minmax(0, 1fr);
    min-width: 0;
    overflow: hidden;
}

.memory-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px;
    border-bottom: 1px solid var(--line);
}

.memory-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(88px, 1fr));
    gap: 10px;
    min-width: min(560px, 52vw);
}

.memory-stats div {
    min-height: 58px;
    padding: 9px 10px;
    border: 1px solid var(--line);
    background: var(--panel-2);
}

.memory-stats span {
    display: block;
    color: var(--muted);
    font-size: 12px;
}

.memory-stats strong {
    display: block;
    margin-top: 3px;
    font-size: 20px;
    line-height: 1;
    white-space: nowrap;
}

.memory-actions {
    display: flex;
    justify-content: flex-end;
    padding: 12px 14px;
    border-bottom: 1px solid var(--line);
}

.memory-board {
    display: grid;
    grid-template-columns: repeat(10, minmax(54px, 1fr));
    gap: 7px;
    align-content: start;
    min-height: 0;
    overflow: auto;
    padding: 14px;
}

.memory-card {
    position: relative;
    display: block;
    min-width: 0;
    aspect-ratio: 4 / 5;
    border: 0;
    padding: 0;
    background: transparent;
    perspective: 800px;
}

.memory-card:disabled {
    cursor: default;
}

.card-inner {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transition: transform .22s ease;
}

.memory-card.is-open .card-inner,
.memory-card.is-matched .card-inner {
    transform: rotateY(180deg);
}

.card-face {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    backface-visibility: hidden;
    overflow: hidden;
}

.card-back {
    background:
        linear-gradient(135deg, rgba(83, 216, 251, .18), transparent 44%),
        repeating-linear-gradient(45deg, #202832 0 8px, #18202a 8px 16px);
}

.card-back::before {
    content: "";
    width: 42%;
    aspect-ratio: 1;
    border: 2px solid var(--cyan);
    transform: rotate(45deg);
}

.card-front {
    padding: 5px;
    background: #0d1218;
    transform: rotateY(180deg);
}

.card-front svg {
    width: 100%;
    height: 100%;
    display: block;
}

.memory-card.is-matched .card-front {
    border-color: var(--green);
    box-shadow: inset 0 0 0 2px rgba(99, 230, 163, .32);
}

.memory-modal {
    position: fixed;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 16px;
    background: rgba(8, 12, 17, .72);
}

.memory-modal[hidden] {
    display: none;
}

.memory-finish-card {
    width: min(94vw, 430px);
    padding: 22px;
}

.memory-finish-card label {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 13px;
}

.memory-finish-card #saveMessage {
    min-height: 20px;
}

#playAgainBtn {
    width: 100%;
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--line);
}

@media (max-width: 1100px) {
    .memory-shell {
        grid-template-columns: 1fr;
    }

    .memory-topbar {
        align-items: stretch;
        flex-direction: column;
    }

    .memory-stats {
        min-width: 0;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .memory-shell {
        padding: 10px;
    }

    .memory-board {
        grid-template-columns: repeat(5, minmax(48px, 1fr));
        gap: 6px;
        padding: 10px;
    }
}