*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{  
    font-family: 'Arial',sans-serif;
    background: #1b1b1b;
    color: white;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.container{
    text-align: center;
    max-width: 500px;
    width: 100%;
    padding: 20px;
}
h1{
    font-size: 3rem;
    margin-bottom: 30px;
    color: #00d4ff;
    font-weight: 300;
    letter-spacing: 2px;
}
.game-info{
    margin-bottom: 30px;
}
.current-player{
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: white;
    transition: color 0.3s ease;
}
.game-board{
    display: grid;
    grid-template-columns: repeat(3,1fr);
    grid-gap: 3px;
    max-width: 400px;
    background: #333;
    padding: 15px;
    border-radius: 12px;
    margin: 0 auto 30px;
    box-shadow: 0 10px 30px rgba(0,212,255,0.2);
}
.cell{
    aspect-ratio: 1;
    background: #2a2a2a;
    border: none;
    border-radius: 8px;
    font-size: 3rem;
    font-weight: bold;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
}
.cell:hover:not(.taken){
    background: #3a3a3a;
    transform: scale(1.05);
}
.cell.taken{
    cursor: not-allowed;
}
.cell.x{
    color: #ff6b6b;
}
.cell.o{
    color: #4ecdc4
}
.cell.win {
    background-color: rgb(156, 223, 156);
    font-weight: bold;
}


@keyframes winner-glow{
    0%{transform: scale(1);}
    50%{transform: scale(1.1);background: #555;}
    100%{transform: scale(1);}
} 
.controls{
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 30px;
}
.btn{
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.btn-primary{
    background: transparent;
    color:#00d4e6;
    border: 2px solid #00d4e6 ;
}
.btn-primary:hover{
    background: #00d4e6;
    color: #1a1a1a;
    transform: translateY(-2px);
}

.btn-secondary{
    background: transparent;
    color:#00d4e6;
    border: 2px solid #00d4e6 ;
}
.btn-secondary:hover{
    background: #00d4e6;
    color: #1a1a1a;
    transform: translateY(-2px);
}
.game-status{
    font-size: 1.8rem;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.winner-message{
    color:#00d4ff;
    font-weight: bold;
}
.tie-message{
    color:#ffa500;
    font-weight: bold;
}
.score-board{
    display: flex;
    justify-content: space-evenly;
    margin-top: 30px;
    padding: 20px;
    background: #2a2a2a;
    border-radius: 12px;
}

.score{
    text-align: center;
}
.score-lable{
    font-size: 0.9rem;
    color: #aaa;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score-value{
    font-size: 2rem;
    font-weight: bold;
}
.score.x .score-value{
    color: #ff6b6b;
}
.score.o .score-value{
    color: #ff6b6b;
}
.score.tie .score-value{
    color: #ffa500;
}

@media (max-width:480px){
    h1{
        font-size: 2rem;
    }
    .cell{
        font-size: 2rem;
        min-height: 80px;
    }
    .controls{
        flex-direction: column;
        align-items: center;
        .btn{
            width: 200px;
        }
    }

}