.modos {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-4) var(--space-6);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
}

.modo-tarjeta {
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-4);
    text-align: center;
    box-shadow: var(--sombra-tarjeta);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.modo-icono {
    width: 3rem;
    height: 3rem;
    margin: 0 auto;
    border-radius: 50%;
    background-color: var(--color-accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.modo-icono.blancas {
    background: radial-gradient(circle at 35% 30%, #ffffff, #e4ded2 65%, #cfc6b8 100%);
    border: 1px solid #b8ae9c;
}

.modo-icono.negras {
    background: radial-gradient(circle at 35% 30%, #4a4a4a, #1c1c1c 65%, #000000 100%);
    border: 1px solid #000;
}

.modo-tarjeta h2 {
    font-size: 1.3rem;
}

.modo-tarjeta p {
    color: var(--color-text-muted);
    margin: 0;
    flex: 1;
    font-size: 0.95rem;
}

.config-ia {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-4) var(--space-6);
}

.config-bloque {
    margin-bottom: var(--space-5);
}

.config-bloque h2 {
    font-size: 1.1rem;
    margin-bottom: var(--space-3);
    text-align: center;
}

.opciones-radio {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-3);
}

.opciones-radio-color {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
}

.opcion-radio {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background-color: var(--color-bg-elevated);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.opcion-radio input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

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

.opcion-radio:has(input:checked) {
    border-color: var(--color-accent);
    background-color: var(--color-accent-soft);
}

.opcion-radio-titulo {
    font-weight: 600;
    font-size: 0.95rem;
}

.opcion-radio-desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.boton-jugar-ia {
    display: block;
    margin: var(--space-5) auto 0;
    min-width: 200px;
}