/* =========================
   Variables globales (tema)
   ========================= */
:root {
    --primary-color: #4a6fa5;
    --secondary-color: #ff7e5f;
    --background-color: #f8f9fa;
    --text-color: #333;
    --light-color: #fff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* =========================
   Reset básico
   ========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* =========================
   Cuerpo del documento
   ========================= */
body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

/* =========================
   Contenedor principal
   ========================= */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--light-color);
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

/* =========================
   Título principal
   ========================= */
h1 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 2.5rem;
}

/* =========================
   Información de jugadores
   ========================= */
.game-info {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 20px;
    background-color: #f0f0f0;
    padding: 15px;
    border-radius: 8px;
}

.player {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 20px;
    border-radius: 5px;
    transition: var(--transition);
}

.player.active {
    background-color: var(--primary-color);
    color: var(--light-color);
}

#player-x.active {
    background-color: var(--primary-color);
}

#player-o.active {
    background-color: var(--secondary-color);
}

.vs {
    font-weight: bold;
    font-size: 1.2rem;
    color: var(--text-color);
}

.score {
    font-size: 1.5rem;
    font-weight: bold;
    margin-top: 5px;
}

/* =========================
   Indicador de turno
   ========================= */
.turn-indicator {
    margin: 15px 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.turn-indicator span {
    color: var(--primary-color);
    font-weight: 700;
}

/* =========================
   Tablero del juego
   ========================= */
.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 10px;
    margin: 20px auto;
    max-width: 300px;
}

.cell {
    aspect-ratio: 1;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: var(--transition);
    border: none;
}

.cell:hover {
    background-color: #e0e0e0;
    transform: scale(1.03);
}

.cell.x {
    color: var(--primary-color);
}

.cell.o {
    color: var(--secondary-color);
}

.winning-cell {
    background-color: #d1ffd1;
    box-shadow: 0 0 8px #28a745;
}

/* =========================
   Mensajes del juego
   ========================= */
.message {
    margin: 20px 0;
    padding: 10px;
    font-size: 1.2rem;
    font-weight: bold;
    min-height: 30px;
}

/* =========================
   Controles y botón
   ========================= */
.controls {
    margin-top: 20px;
}

button {
    background-color: var(--primary-color);
    color: var(--light-color);
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

button:hover {
    background-color: #3a5a8f;
    transform: translateY(-2px);
}

/* =========================
   Adaptabilidad (responsive)
   ========================= */
@media (max-width: 500px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 2rem;
    }

    .game-info {
        flex-direction: column;
        gap: 10px;
    }

    .player {
        width: 100%;
    }
}