/* ============================================
   Memory Match Game Styles
   ============================================ */

.memory-match-game {
    width: 100%;
    max-width: 550px;
    margin: 0 auto;
}

.memory-match-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.memory-match-header h2 {
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.memory-match-instruction {
    font-size: 1rem;
    color: var(--color-text-dark);
    opacity: 0.8;
    margin: 0 0 var(--spacing-sm) 0;
}

/* Stats */
.memory-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.stat-item {
    font-size: 0.875rem;
    color: var(--color-text-dark);
}

.stat-item strong {
    color: var(--color-secondary);
    font-weight: 700;
}

/* Card Grid */
.memory-card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #FFFFFF, #F0F8F9);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--color-shadow-teal);
    border: 2px solid rgba(77, 184, 196, 0.3);
}

/* Memory Card */
.memory-card {
    aspect-ratio: 1;
    cursor: pointer;
    perspective: 1000px;
    position: relative;
    perspective-origin: center center;
}


.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 600ms;
    transform-style: preserve-3d;
    transform-origin: center center;
}


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

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

.memory-card.matched {
    pointer-events: none;
}

/* Card Faces */
.card-front,
.card-back {
    position: absolute;
    top: 0;          
    left: 0;         
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Front (face down) - FIXED */
.card-front {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border: 3px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

/* Pattern - Use pseudo-element to prevent distortion */
.card-front::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(45deg, 
            rgba(255, 255, 255, 0.1) 0px, 
            rgba(255, 255, 255, 0.1) 10px, 
            transparent 10px, 
            transparent 20px),
        repeating-linear-gradient(-45deg, 
            rgba(255, 255, 255, 0.1) 0px, 
            rgba(255, 255, 255, 0.1) 10px, 
            transparent 10px, 
            transparent 20px);
    /* Prevent this from being affected by 3D transform */
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Shine effect on top */
.card-front::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 70%
    );
    animation: shimmer 3s infinite;
    pointer-events: none;
    z-index: 1;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%);
    }
    100% {
        transform: translateX(100%) translateY(100%);
    }
}

/* Back (face up) */
.card-back {
    background: linear-gradient(135deg, #FFFFFF, #E8F4F5);
    border: 3px solid var(--color-primary);
    transform: rotateY(180deg);
}

.card-emoji {
    font-size: 2.5rem;
}

/* Matched card overlay */
.card-matched-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 188, 156, 0.95), rgba(22, 160, 133, 0.95));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 400ms ease-out;
    z-index: 3;
}

.memory-card.matched .card-matched-overlay {
    opacity: 1;
}

.check-icon {
    font-size: 2.5rem;
    color: white;
    font-weight: bold;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    animation: checkPop 400ms ease-out;
}

@keyframes checkPop {
    0% {
        opacity: 0;
        transform: scale(0);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Hover effect */
.memory-card:not(.flipped):not(.matched):hover .card-inner {
    transform: scale(1.05);
}

.memory-card:not(.flipped):not(.matched):active .card-inner {
    transform: scale(0.95);
}

/* Hint */
.memory-match-hint {
    text-align: center;
    margin-top: var(--spacing-sm);
}

.memory-match-hint small {
    color: var(--color-text-dark);
    opacity: 0.6;
    font-size: 0.875rem;
}

/* Completion State */
.memory-complete {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-lg);
    animation: contentScaleFade 600ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.memory-complete h3 {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.memory-message {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-md);
}

.memory-stats-final {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 600;
}

@keyframes contentScaleFade {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .memory-card-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        padding: var(--spacing-sm);
    }
    
    .card-emoji {
        font-size: 2rem;
    }
    
    .check-icon {
        font-size: 2rem;
    }
    
    .memory-match-header h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .memory-card-grid {
        gap: 8px;
    }
    
    .card-emoji {
        font-size: 1.75rem;
    }
    
    .check-icon {
        font-size: 1.75rem;
    }
}