/* Estilos generales */
body {
    margin: 0;
    font-family: 'Orbitron', sans-serif;
    background: radial-gradient(circle at center, #0f2027, #203a43, #2c5364);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* Contenedor principal */
.container {
    text-align: center;
    background: rgba(0, 0, 0, 0.6);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 0 25px rgba(0, 255, 255, 0.6);
    width: 400px;
}

/* Título */
h1 {
    font-size: 2.5rem;
    text-shadow: 0 0 10px cyan, 0 0 20px cyan;
    margin-bottom: 15px;
}

/* Opciones de juego */
.game-options, .game-mode {
    margin-bottom: 15px;
}

.symbol-btn, .mode-btn {
    background: transparent;
    border: 2px solid cyan;
    color: cyan;
    padding: 10px 20px;
    margin: 5px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
    text-shadow: 0 0 5px cyan;
}

.symbol-btn:hover, .mode-btn:hover {
    background: cyan;
    color: #000;
    box-shadow: 0 0 15px cyan;
}

.symbol-btn.active, .mode-btn.active {
    background: cyan;
    color: #000;
    box-shadow: 0 0 15px cyan, 0 0 30px cyan;
}

/* Tablero */
.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 10px;
    justify-content: center;
    margin: 20px auto;
}

.cell {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid cyan;
    border-radius: 12px;
    font-size: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.3s ease;
}

.cell:hover {
    background: rgba(0, 255, 255, 0.2);
    transform: scale(1.05);
}

/* Colores para X y O */
.cell:contains("X") {
    color: #00f0ff;
    text-shadow: 0 0 10px #00f0ff, 0 0 25px #00f0ff;
}

.cell:contains("O") {
    color: #ff0040;
    text-shadow: 0 0 10px #ff0040, 0 0 25px #ff0040;
}

/* Estado del juego */
.status {
    margin: 15px 0;
    font-size: 1.2rem;
    text-shadow: 0 0 5px cyan;
}

/* Botón de reinicio */
.reset-btn {
    background: transparent;
    border: 2px solid #ff0040;
    color: #ff0040;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.3s;
    text-shadow: 0 0 5px #ff0040;
}

.reset-btn:hover {
    background: #ff0040;
    color: #000;
    box-shadow: 0 0 15px #ff0040, 0 0 30px #ff0040;
}

/* Marcador */
.scoreboard {
    display: flex;
    justify-content: space-around;
    margin-bottom: 15px;
    font-size: 1rem;
    text-shadow: 0 0 5px cyan;
}

.scoreboard p {
    margin: 0;
}
/* Celdas ganadoras */
.winner {
    background: rgba(0, 255, 100, 0.3) !important;
    box-shadow: 0 0 20px #00ff88, 0 0 40px #00ff88;
    animation: blink 1s infinite alternate;
}

/* Parpadeo verde neón */
@keyframes blink {
    from { background: rgba(0, 255, 100, 0.3); }
    to   { background: rgba(0, 255, 100, 0.7); }
}