/* ============================================
   GR Certificados - Animations
   ============================================ */

/* Fade In Up */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger Children */
.stagger > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger.visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(7) { transition-delay: 480ms; opacity: 1; transform: translateY(0); }
.stagger.visible > *:nth-child(8) { transition-delay: 560ms; opacity: 1; transform: translateY(0); }

/* Scale In */
.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Header Scroll Effect */
.header.scrolled {
    box-shadow: var(--shadow-sm);
}

/* Smooth Section Transitions */
.section {
    transition: opacity 0.3s ease;
}

/* Button Ripple */
.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: rgba(255, 255, 255, 0.3);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
    z-index: -1;
}

.btn:active::after {
    opacity: 1;
    transition: opacity 0s;
}

/* FAQ Smooth */
.faq-answer {
    transition: max-height 0.35s cubic-bezier(0.23, 1, 0.32, 1),
                padding 0.35s cubic-bezier(0.23, 1, 0.32, 1),
                opacity 0.25s ease;
}

.faq-item .faq-answer {
    opacity: 0;
}

.faq-item.active .faq-answer {
    opacity: 1;
}

/* Pricing Card Hover */
.pricing-card {
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1),
                box-shadow 0.3s cubic-bezier(0.23, 1, 0.32, 1),
                border-color 0.3s ease;
}

/* Advantage Card Hover */
.advantage-card {
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1),
                box-shadow 0.3s cubic-bezier(0.23, 1, 0.32, 1),
                border-color 0.3s ease;
}

/* Loading Skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--line) 25%, #f0f2f5 50%, var(--line) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Page Transition */
.page-enter {
    animation: pageEnter 0.4s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}