* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f2f2f2;
            display: flex;
            flex-direction: column;
            height: 100vh;
            justify-content: space-between;
            padding: 20px;
        }

        /* Área de la Pregunta */
        .question-container {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            padding: 30px;
            text-align: center;
            font-size: 24px;
            font-weight: bold;
            color: #333;
            margin-bottom: 20px;
            flex-grow: 0;
        }

        /* Cuadrícula de Respuestas */
        .answers-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
            flex-grow: 1;
        }

        /* Botones de Respuesta Básicos */
        .btn-answer {
            border: none;
            border-radius: 8px;
            color: white;
            font-size: 22px;
            font-weight: bold;
            display: flex;
            align-items: center;
            padding: 20px;
            cursor: pointer;
            transition: transform 0.1s ease, filter 0.1s ease;
            box-shadow: 0 6px 0 rgba(0,0,0,0.2);
            text-align: left;
        }

        .btn-answer:active {
            transform: translateY(4px);
            box-shadow: 0 2px 0 rgba(0,0,0,0.2);
        }

        /* Variaciones de Color y Formas */
        .red { 
            background-color: #e21b3c; 
        }
        .red:hover { filter: brightness(1.1); }

        .blue { 
            background-color: #1368ce; 
        }
        .blue:hover { filter: brightness(1.1); }

        .yellow { 
            background-color: #d89e00; 
        }
        .yellow:hover { filter: brightness(1.1); }

        .green { 
            background-color: #26890c; 
        }
        .green:hover { filter: brightness(1.1); }

        /* Iconos Geométricos Simulados con CSS */
        .shape {
            display: inline-block;
            width: 30px;
            height: 30px;
            margin-right: 20px;
            flex-shrink: 0;
            background-color: white;
        }

        .triangle {
            clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
        }

        .diamond {
            clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
        }

        .circle {
            border-radius: 50%;
        }

        .square {
            /* Por defecto es un cuadrado */
        }

        /* Adaptabilidad para Móviles */
        @media (max-width: 768px) {
            .answers-grid {
                grid-template-columns: 1fr;
            }
            .question-container {
                font-size: 20px;
                padding: 20px;
            }
            .btn-answer {
                font-size: 18px;
            }
        }

/* ===== Lógica de juego (js/juego.js) ===== */

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.progress-track {
    height: 8px;
    background-color: #ddd;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-fill {
    height: 100%;
    width: 0;
    background-color: #1368ce;
    transition: width 0.3s ease;
}

.feedback {
    min-height: 1.5em;
    margin-top: 12px;
    font-size: 18px;
    font-weight: 600;
}

.feedback.ok { color: #26890c; }
.feedback.ko { color: #e21b3c; }

/* Mientras se envía la respuesta o se ve el feedback no se puede volver a pulsar */
.answers-grid.bloqueado .btn-answer {
    pointer-events: none;
}

.btn-answer.correcta {
    box-shadow: 0 0 0 6px #fff, 0 0 0 10px #26890c;
}

.btn-answer.incorrecta,
.btn-answer.atenuada {
    opacity: 0.45;
}

.btn-answer:focus-visible {
    outline: 4px solid #333;
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
    .progress-fill,
    .btn-answer {
        transition: none;
    }
}