/* =============================================================================
   MEMORY — game-specific styles (board, 3D card flip, bests table).
   Shared section chrome lives in games.css; site tokens come from style.css.
   ============================================================================= */

.memory-wrap {
    max-width: 640px;
}

/* ---------------- Board ---------------- */

.memory-board {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1rem;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}

.memory-board--small  { grid-template-columns: repeat(4, 1fr); max-width: 400px; }
.memory-board--medium { grid-template-columns: repeat(5, 1fr); max-width: 500px; }
.memory-board--large  { grid-template-columns: repeat(6, 1fr); max-width: 560px; }

/* ---------------- Cards (3D flip) ---------------- */

.memory-card {
    position: relative;
    appearance: none;
    -webkit-appearance: none;
    aspect-ratio: 1;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    font-family: var(--font-family);
    cursor: pointer;
    perspective: 600px;
    -webkit-tap-highlight-color: transparent;
}

.memory-card-inner {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
    transition: transform 0.35s ease;
}

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

.memory-card-face {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--border-radius-sm);
    line-height: 1;
}

/* Face-down side: site-red back with a bordered "?" pattern. */
.memory-card-cover {
    background: var(--color-primary);
    color: var(--color-white);
    font-size: clamp(1rem, 4vw, 1.6rem);
    font-weight: 700;
    box-shadow: var(--shadow-sm), inset 0 0 0 3px rgba(255, 255, 255, 0.35);
    transition: var(--transition);
}

.memory-card:hover .memory-card-cover,
.memory-card:focus-visible .memory-card-cover {
    background: var(--color-primary-dark);
}

/* Face-up side: white card with the emoji. */
.memory-card-emoji {
    transform: rotateY(180deg);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    box-shadow: var(--shadow-sm);
    font-size: clamp(1.3rem, 6vw, 2.2rem);
}

.memory-card.is-matched {
    cursor: default;
}

.memory-card.is-matched .memory-card-emoji {
    background: var(--color-success-bg);
    border-color: var(--color-success);
}

.memory-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--border-radius-sm);
}

/* ---------------- Screen-reader-only live region ---------------- */

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

/* ---------------- Bests table (win / stats modal) ---------------- */

.memory-bests-title {
    margin-top: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    font-size: 0.95rem;
}

.memory-bests {
    width: 100%;
    margin-top: 0.5rem;
    border-collapse: collapse;
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

.memory-bests th {
    font-weight: 600;
    color: var(--color-gray-500);
    font-size: 0.8rem;
}

.memory-bests th,
.memory-bests td {
    padding: 0.35rem 0.5rem;
    border-bottom: 1px solid var(--color-gray-200);
    text-align: center;
}

.memory-bests td:first-child,
.memory-bests th:first-child {
    text-align: left;
}

.memory-bests tbody tr:last-child td {
    border-bottom: none;
}

/* ---------------- Motion & responsive ---------------- */

@media (prefers-reduced-motion: reduce) {
    .memory-card-inner {
        transition: none;
    }
}

@media (max-width: 600px) {
    .memory-board {
        gap: 0.3rem;
    }

    .memory-card-emoji {
        font-size: clamp(1.1rem, 7vw, 1.8rem);
    }
}