/* ====================================================
   GLOBAL VISUAL EFFECTS — Lightweight Version
   Scroll Animations + Card Glow only
   ==================================================== */

/* ---- 1. Scroll-Triggered Fade-In Animations ---- */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children within a grid */
.scroll-reveal-stagger>* {
    opacity: 0;
    transform: translateY(25px);
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal-stagger.is-visible>*:nth-child(1) {
    transition-delay: 0s;
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-stagger.is-visible>*:nth-child(2) {
    transition-delay: 0.08s;
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-stagger.is-visible>*:nth-child(3) {
    transition-delay: 0.16s;
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-stagger.is-visible>*:nth-child(4) {
    transition-delay: 0.24s;
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-stagger.is-visible>*:nth-child(5) {
    transition-delay: 0.32s;
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal-stagger.is-visible>*:nth-child(6) {
    transition-delay: 0.40s;
    opacity: 1;
    transform: translateY(0);
}

/* ---- 2. Subtle Hover Glow on Cards (desktop only) ---- */
@media (min-width: 769px) {

    .fefu-card::after,
    .program-card::after,
    .step-card::after,
    .feature-card::after,
    .acc-badge::after {
        content: '';
        position: absolute;
        inset: 0;
        opacity: 0;
        background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.05), transparent 60%);
        transition: opacity 0.4s ease;
        pointer-events: none;
        z-index: 1;
    }

    .fefu-card:hover::after,
    .program-card:hover::after,
    .step-card:hover::after,
    .feature-card:hover::after,
    .acc-badge:hover::after {
        opacity: 1;
    }
}

/* ---- 3. Subtle section border (dark mode only) ---- */
.section+.section {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

/* In light mode the alternating backgrounds handle separation — no border needed */
[data-theme="light"] .section+.section {
    border-top: none;
}

/* ---- 4. Scroll to Top FAB ---- */
.scroll-top-fab {
    position: fixed;
    bottom: 90px;
    right: 28px;
    z-index: 9998;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.scroll-top-fab.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.scroll-top-fab:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

@media (max-width: 768px) {
    .scroll-top-fab {
        bottom: 80px;
        right: 18px;
        width: 40px;
        height: 40px;
    }
}

[data-theme="light"] .scroll-top-fab {
    background: rgba(0, 0, 0, 0.05);
    border-color: rgba(0, 0, 0, 0.1);
    color: #1a1a1a;
}

[data-theme="light"] .scroll-top-fab:hover {
    background: var(--primary-color);
    color: #fff;
}