/* --- VARIABLES DE COLOR (Estilo VS Code Dark) --- */
:root {
    --bg-color: #1e1e1e;
    --text-color: #d4d4d4;
    --accent-color: #007acc; 
    --titulos-color: #4ec9b0; 
    --border-color: #3b3b3b;
    --card-bg: #252526;
    --hover-bg: #2a2d2e;
    --success: #6a9955;
    --error: #f44747;
    --warning: #d7ba7d;
}

/* --- ESTILOS GENERALES --- */
body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 2rem auto;
    max-width: 850px;
    padding: 0 20px;
}

h1 {
    color: var(--titulos-color);
    text-align: center;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
}

/* --- SELECTOR Y BOTONES --- */
select, button {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

select:focus, button:hover {
    border-color: var(--accent-color);
    background-color: var(--hover-bg);
}

button#aleatoria {
    background-color: var(--accent-color);
    color: white;
    font-weight: bold;
}

/* --- TARJETA DE PREGUNTA --- */
.pregunta {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.pregunta p strong {
    color: var(--titulos-color);
    font-size: 1.2rem;
    display: block;
    margin-bottom: 1rem;
}

/* --- OPCIONES (Efecto lista de terminal) --- */
.opcion {
    display: block;
    padding: 12px 15px;
    margin: 8px 0;
    background: var(--bg-color);
    border: 1px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.2s;
}

.opcion:hover {
    border-color: var(--accent-color);
    background: var(--hover-bg);
}

.opcion input[type="radio"] {
    margin-right: 12px;
    accent-color: var(--accent-color);
}

/* --- FEEDBACK Y RESULTADOS --- */
#resultado {
    margin: 20px 0;
    padding: 15px;
    border-radius: 5px;
    border: 2px solid var(--border-color);
    background: var(--bg-color);
    margin-bottom: 10px;
}

#feedback {
    margin-top: 1.5rem;
    padding: 10px;
    border-radius: 4px;
    text-align: center;
    font-family: 'Consolas', monospace;
}

/* --- ANIMACIÓN DE CARGA --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.pregunta {
    animation: fadeIn 0.3s ease-out;
}