body { 
    display:flex; 
    flex-direction:column; 
    align-items:center; 
    background:#1a1a1a; 
    font-family:sans-serif; 
    color:#eee; 
    margin:0; 
    padding:20px;
}
.contenedor-juego {
    display: flex;
    gap: 40px;
    margin-top: 20px;
}
#estado {
    margin:20px;
    font-size:22px;
    font-weight:bold;
    color:#f0f0f0;
}
#tablero-contenedor {
    display: grid;
    grid-template-columns: 20px repeat(8, 70px) 20px;
    grid-template-rows: 20px repeat(8, 70px) 20px;
    justify-content: center;
    align-content: center;
}
#tablero {
    grid-column: 2 / 10;
    grid-row: 2 / 10;
    display:grid; 
    grid-template-columns:repeat(8,70px); 
    grid-template-rows:repeat(8,70px); 
    border:4px solid #444; 
    box-shadow:0 8px 20px rgba(0,0,0,0.5);
}
.casilla {
    display:flex; 
    justify-content:center; 
    align-items:center; 
    font-size:40px; 
    cursor:pointer; 
    transition:background 0.3s, transform 0.2s;
}
.casilla:hover {
    transform:scale(1.1);
}
.blanca {
    background:#f0d9b5;
}
.negra {
    background:#b58863;
}
.seleccionada {
    outline:3px solid #ff5050;
}
.blanca-pieza {
    color:#fff;
}
.negra-pieza {
    color:#000;
}
.coordenada {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    color: #999;
}
.coordenada-letras {
    grid-row: 1;
}
.coordenada-numeros {
    grid-column: 1;
}
button, select {
    margin:10px;
    padding:8px 16px;
    font-size:16px;
    border-radius:8px;
    border:none;
    cursor:pointer;
}
button {
    background:#ff5050;
    color:#fff;
}
button:hover {
    background:#ff3030;
}
select {
    background:#333;
    color:#fff;
}
select:hover {
    background:#555;
}
#chat-historial {
    width: 300px;
    height: 600px;
    background-color: #222;
    border: 4px solid #444;
    padding: 10px;
    box-sizing: border-box;
    overflow-y: auto;
    font-size: 14px;
    border-radius: 8px;
    box-shadow:0 4px 10px rgba(0,0,0,0.3);
}
.jugada {
    margin-bottom: 5px;
}
.jugada-numero {
    font-weight: bold;
    color: #999;
    margin-right: 10px;
}
.jugada-blancas {
    color: #fff;
    font-weight: bold;
}
.jugada-negras {
    color: #ccc;
}

footer {
  text-align: center;
  padding: 2rem;
  background: #1a1a1a;
  color: #aaa;
}