/* ============================================
   Scroll Animations & Micro-interactions
   ============================================ */

/* ============================================
   1. Scroll Animation Base States
   ============================================ */

/* Fade up: element starts 30px below, invisible */
[data-animate="fade-up"] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="fade-up"].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Fade in: just opacity */
[data-animate="fade-in"] {
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="fade-in"].is-visible {
    opacity: 1;
}

/* Scale in: scale from 0.95 + opacity */
[data-animate="scale-in"] {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="scale-in"].is-visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger: parent container, children animate with delay */
[data-animate="stagger"] > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="stagger"].is-visible > *:nth-child(1) { transition-delay: 0ms; }
[data-animate="stagger"].is-visible > *:nth-child(2) { transition-delay: 100ms; }
[data-animate="stagger"].is-visible > *:nth-child(3) { transition-delay: 200ms; }
[data-animate="stagger"].is-visible > *:nth-child(4) { transition-delay: 300ms; }
[data-animate="stagger"].is-visible > *:nth-child(5) { transition-delay: 400ms; }
[data-animate="stagger"].is-visible > *:nth-child(6) { transition-delay: 500ms; }

[data-animate="stagger"].is-visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   2. Button Animations (CSS only)
   ============================================ */

/* Primary button: lift on hover */
.btn-primary {
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.45);
}

.btn-primary:active {
    transform: scale(0.97) translateY(0);
}

/* Secondary button: border + fill on hover */
.btn-secondary,
.btn-light {
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-secondary:hover,
.btn-light:hover {
    border-color: var(--primary-purple);
    background-color: var(--bg-purple-muted);
}

.btn-secondary:active,
.btn-light:active {
    transform: scale(0.97);
}

/* All other buttons: active scale */
.btn:active,
.support-btn:active {
    transform: scale(0.97);
}

/* ============================================
   3. Card Hover Interactions (CSS only)
   ============================================ */

/* Offer card: lift + shadow */
.offer-card {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.offer-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

/* Feature card: background shift */
.feature-card {
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
    background-color: var(--bg-purple-light);
    box-shadow: var(--shadow-card);
}

/* Target small card: lift + border */
.target-small-card {
    transition: transform var(--transition-normal),
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
    border: 1px solid transparent;
}

.target-small-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-md);
}

/* Expert card: shadow increase */
.expert-card {
    transition: box-shadow var(--transition-normal);
}

.expert-card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* ============================================
   4. Navigation Link Underline Animation
   ============================================ */

/* Smooth underline from left to right for nav links */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-purple);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::after {
    width: 100%;
}

/* ============================================
   5. Social Links in Footer
   ============================================ */

.social-link {
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.social-link:hover {
    transform: scale(1.15);
    color: var(--primary-purple);
}

/* ============================================
   6. Certificate Image Scale
   ============================================ */

.certificate-img {
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.certificate-img:hover {
    transform: scale(1.02);
}

/* ============================================
   7. Reduced Motion — Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    [data-animate="fade-up"],
    [data-animate="fade-in"],
    [data-animate="scale-in"],
    [data-animate="stagger"] > * {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    .btn-primary:hover,
    .btn-primary:active,
    .btn-secondary:hover,
    .btn-secondary:active,
    .btn-light:hover,
    .btn-light:active,
    .btn:active,
    .support-btn:active,
    .offer-card:hover,
    .feature-card:hover,
    .target-small-card:hover,
    .expert-card:hover,
    .certificate-img:hover,
    .social-link:hover,
    .nav-link::after {
        transform: none !important;
        transition: none !important;
    }
}