/* Memory Cards Game Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #2c3e50;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    margin-bottom: 15px;
}

.back-btn {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.back-btn:hover {
    background: #2980b9;
    transform: translateY(-2px);
}

.game-container {
    display: grid;
    grid-template-columns: 300px 1fr 250px;
    gap: 20px;
    align-items: start;
}

.game-info, .game-settings {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.game-info h3, .game-settings h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.3rem;
    border-bottom: 2px solid #667eea;
    padding-bottom: 5px;
}

.score-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.score-item {
    display: flex;
    justify-content: space-between;
    padding: 8px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 5px;
}

.label {
    font-weight: 600;
    color: #7f8c8d;
}

.value {
    font-weight: 700;
    color: #2c3e50;
}

.game-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.game-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #2ecc71;
    color: white;
}

.game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.game-btn.secondary {
    background: #95a5a6;
}

.game-btn.secondary:hover {
    background: #7f8c8d;
}

.game-btn.warning {
    background: #f39c12;
}

.game-btn.warning:hover {
    background: #e67e22;
}

.level-info {
    margin-bottom: 20px;
}

.level-display {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.level-number {
    background: #667eea;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.level-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
}

.level-progress {
    margin-top: 10px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.rules-info ul {
    list-style: none;
    padding: 0;
}

.rules-info li {
    padding: 5px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
}

.rules-info li:last-child {
    border-bottom: none;
}

.game-board {
    display: flex;
    justify-content: center;
    align-items: center;
}

.board-container {
    position: relative;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.memory-grid {
    display: grid;
    gap: 10px;
    justify-content: center;
    min-height: 400px;
}

.memory-grid.easy {
    grid-template-columns: repeat(4, 80px);
    grid-template-rows: repeat(3, 80px);
}

.memory-grid.medium {
    grid-template-columns: repeat(4, 80px);
    grid-template-rows: repeat(4, 80px);
}

.memory-grid.hard {
    grid-template-columns: repeat(6, 70px);
    grid-template-rows: repeat(4, 70px);
}

.memory-grid.expert {
    grid-template-columns: repeat(6, 60px);
    grid-template-rows: repeat(6, 60px);
}

.memory-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 10px;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.memory-card:hover {
    transform: scale(1.05);
}

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

.memory-card.matched {
    animation: matchPulse 0.6s ease;
    pointer-events: none;
}

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

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.card-back {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.card-front {
    background: white;
    transform: rotateY(180deg);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
}

.overlay-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    max-width: 400px;
}

.overlay-content h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.overlay-content p {
    color: #7f8c8d;
    margin-bottom: 20px;
    line-height: 1.6;
}

.setting {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.setting:last-child {
    border-bottom: none;
}

.setting label {
    font-weight: 600;
    color: #2c3e50;
}

.setting select {
    padding: 5px 10px;
    border: 2px solid #bdc3c7;
    border-radius: 5px;
    background: white;
    color: #2c3e50;
    font-size: 0.9rem;
}

.toggle-btn {
    padding: 6px 12px;
    border: 2px solid #bdc3c7;
    border-radius: 5px;
    background: white;
    color: #7f8c8d;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.toggle-btn.active {
    background: #2ecc71;
    color: white;
    border-color: #27ae60;
}

.toggle-btn:hover {
    transform: translateY(-1px);
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    color: #7f8c8d;
}

/* Animations */
@keyframes matchPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes flipIn {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(180deg);
    }
}

@keyframes flipOut {
    0% {
        transform: rotateY(180deg);
    }
    100% {
        transform: rotateY(0deg);
    }
}

.hint-highlight {
    animation: hintPulse 1s infinite;
}

@keyframes hintPulse {
    0%, 100% {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    }
    50% {
        box-shadow: 0 0 20px #f39c12, 0 0 30px #f39c12;
    }
}

/* Responsive Design */
@media (max-width: 1200px) {
    .game-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .game-info, .game-settings {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .memory-grid.easy {
        grid-template-columns: repeat(4, 60px);
        grid-template-rows: repeat(3, 60px);
    }
    
    .memory-grid.medium {
        grid-template-columns: repeat(4, 60px);
        grid-template-rows: repeat(4, 60px);
    }
    
    .memory-grid.hard {
        grid-template-columns: repeat(6, 50px);
        grid-template-rows: repeat(4, 50px);
    }
    
    .memory-grid.expert {
        grid-template-columns: repeat(6, 45px);
        grid-template-rows: repeat(6, 45px);
    }
    
    .card-face {
        font-size: 1.5rem;
    }
    
    .game-controls {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .game-btn {
        flex: 1;
        min-width: 100px;
    }
}