/* ============================================
   Módulo: Tips de Estimulación Mental
   ============================================ */

/* ---- Section wrapper ---- */
.mental-tips {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.mental-tips__title {
    color: var(--color-white);
}

/* ---- 3-column responsive grid ---- */
.mental-tips__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* ---- Flip card container ---- */
.tip-card {
    perspective: 1000px;
    min-height: 320px;
    cursor: pointer;
    outline: none;
}

.tip-card:focus-visible .tip-card__inner {
    box-shadow:
        0 0 0 2px var(--color-accent),
        0 20px 50px rgba(0, 0, 0, 0.5);
}

/* ---- Inner wrapper – rotates on hover / focus ---- */
.tip-card__inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 320px;
    transform-style: preserve-3d;
    transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.35s ease;
    border-radius: var(--border-radius-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.tip-card:hover .tip-card__inner,
.tip-card:focus-visible .tip-card__inner {
    transform: rotateY(180deg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55),
                0 0 40px rgba(82, 183, 136, 0.18);
}

/* ---- Shared face styles ---- */
.tip-card__front,
.tip-card__back {
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-xl);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    padding: var(--spacing-xl) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-align: center;
    overflow: hidden;
}

/* ---- Front face ---- */
.tip-card__front {
    background: rgba(13, 40, 24, 0.75);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(82, 183, 136, 0.3);
}

.tip-card__front::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(82, 183, 136, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

/* ---- Front icon ---- */
.tip-card__icon {
    width: 72px;
    height: 72px;
    color: var(--color-accent-light);
    margin-bottom: var(--spacing-xs);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.tip-card:hover .tip-card__icon {
    transform: scale(1.08);
}

/* ---- Front text ---- */
.tip-card__category {
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.tip-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.3;
    margin: 0;
}

.tip-card__hint {
    font-size: var(--font-size-sm);
    color: rgba(149, 213, 178, 0.5);
    letter-spacing: 0.02em;
    margin-top: auto;
    padding-top: var(--spacing-xs);
}

/* ---- Back face ---- */
.tip-card__back {
    background: linear-gradient(145deg,
        rgba(26, 77, 46, 0.92) 0%,
        rgba(13, 40, 24, 0.97) 100%);
    border: 1px solid rgba(82, 183, 136, 0.45);
    transform: rotateY(180deg);
    justify-content: flex-start;
    gap: var(--spacing-md);
    padding-top: var(--spacing-xl);
}

.tip-card__back::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
}

/* ---- Back tag ---- */
.tip-card__tag {
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(82, 183, 136, 0.12);
    border: 1px solid rgba(82, 183, 136, 0.3);
    border-radius: 2rem;
    padding: 0.25rem 0.85rem;
}

/* ---- Tip text ---- */
.tip-card__tip {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.88);
    line-height: 1.65;
    flex: 1;
}

.tip-card__tip strong {
    color: var(--color-accent-light);
    font-weight: 700;
}

/* ---- CTA button (reuses bento-btn--sm from products.css) ---- */
.tip-card__cta {
    display: inline-block;
    margin-top: auto;
    font-size: var(--font-size-sm);
    text-decoration: none;
    white-space: nowrap;
}

/* ---- Responsive: stack on mobile ---- */
@media (max-width: 900px) {
    .mental-tips__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 580px) {
    .mental-tips__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .tip-card__inner,
    .tip-card {
        min-height: 280px;
    }

    /* On touch devices, show back face permanently via a toggled class,
       as hover doesn't exist on mobile. JS adds .is-flipped on tap. */
    .tip-card.is-flipped .tip-card__inner {
        transform: rotateY(180deg);
    }

    .tip-card__hint {
        display: none;
    }
}