/* Main container */
.tic-tac-toe-ai-container {
    max-width: 500px;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    padding: 30px;
    margin: 20px auto;
}

/* Header styles */
.tic-tac-toe-ai-container header {
    text-align: center;
    margin-bottom: 25px;
}

.tic-tac-toe-ai-container h1 {
    color: #2c3e50;
    font-size: 2.8rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.tic-tac-toe-ai-container .subtitle {
    color: #7f8c8d;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

/* Game modes */
.tic-tac-toe-ai-container .game-modes {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.tic-tac-toe-ai-container .mode-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f1f2f6;
    color: #2c3e50;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.tic-tac-toe-ai-container .mode-btn.active {
    background: #6a11cb;
    color: white;
}

.tic-tac-toe-ai-container .mode-btn:hover:not(.active) {
    background: #dfe4ea;
}

/* Game info */
.tic-tac-toe-ai-container .game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.tic-tac-toe-ai-container .player-turn {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
}

.tic-tac-toe-ai-container .player-icon {
    font-size: 1.8rem;
}

.tic-tac-toe-ai-container .x-icon {
    color: #e74c3c;
}

.tic-tac-toe-ai-container .o-icon {
    color: #3498db;
}

.tic-tac-toe-ai-container .scores {
    display: flex;
    gap: 15px;
}

.tic-tac-toe-ai-container .score {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 15px;
    border-radius: 8px;
    background: #e9ecef;
    min-width: 80px;
}

.tic-tac-toe-ai-container .score-label {
    font-size: 0.9rem;
    color: #6c757d;
}

.tic-tac-toe-ai-container .score-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.tic-tac-toe-ai-container .x-score {
    color: #e74c3c;
}

.tic-tac-toe-ai-container .o-score {
    color: #3498db;
}

.tic-tac-toe-ai-container .tie-score {
    color: #2c3e50;
}

/* Game board */
.tic-tac-toe-ai-container .game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 12px;
    margin-bottom: 25px;
}

.tic-tac-toe-ai-container .cell {
    aspect-ratio: 1/1;
    background: #f8f9fa;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.tic-tac-toe-ai-container .cell:hover {
    background: #e9ecef;
    transform: translateY(-3px);
}

.tic-tac-toe-ai-container .cell.x {
    color: #e74c3c;
}

.tic-tac-toe-ai-container .cell.o {
    color: #3498db;
}

.tic-tac-toe-ai-container .winning-cell {
    animation: ticPulse 1.5s infinite;
    background: rgba(46, 204, 113, 0.15);
}

@keyframes ticPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* Controls */
.tic-tac-toe-ai-container .controls {
    display: flex;
    gap: 15px;
}

.tic-tac-toe-ai-container button {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.tic-tac-toe-ai-container #restart-btn {
    background: #2c3e50;
    color: white;
}

.tic-tac-toe-ai-container #restart-btn:hover {
    background: #1a252f;
    transform: translateY(-3px);
}

.tic-tac-toe-ai-container #reset-btn {
    background: #e74c3c;
    color: white;
}

.tic-tac-toe-ai-container #reset-btn:hover {
    background: #c0392b;
    transform: translateY(-3px);
}

/* Game message */
.tic-tac-toe-ai-container .game-message {
    text-align: center;
    margin-top: 20px;
    min-height: 40px;
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    padding: 10px;
    border-radius: 10px;
}

.tic-tac-toe-ai-container .win-message {
    color: #27ae60;
    background: rgba(39, 174, 96, 0.1);
    animation: ticCelebrate 0.5s ease;
}

.tic-tac-toe-ai-container .draw-message {
    color: #f39c12;
    background: rgba(243, 156, 18, 0.1);
}

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

/* Difficulty */
.tic-tac-toe-ai-container .difficulty {
    margin: 20px 0;
    text-align: center;
}

.tic-tac-toe-ai-container .difficulty h3 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.tic-tac-toe-ai-container .difficulty-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.tic-tac-toe-ai-container .diff-btn {
    padding: 8px 15px;
    border: none;
    border-radius: 8px;
    background: #e9ecef;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tic-tac-toe-ai-container .diff-btn.active {
    background: #6a11cb;
    color: white;
}

/* Responsive styles */
@media (max-width: 500px) {
    .tic-tac-toe-ai-container {
        padding: 20px;
    }
    
    .tic-tac-toe-ai-container h1 {
        font-size: 2.2rem;
    }
    
    .tic-tac-toe-ai-container .cell {
        font-size: 2.8rem;
    }
    
    .tic-tac-toe-ai-container .scores {
        flex-direction: column;
        gap: 8px;
    }
    
    .tic-tac-toe-ai-container .controls {
        flex-direction: column;
    }
    
    .tic-tac-toe-ai-container .game-modes {
        flex-direction: column;
    }
}