/* ============================================================
   ENACTUS NUST — animations.css
   Scroll-reveal, fade-in, and micro-animation utilities
   ============================================================ */

/* ── Scroll Reveal ─────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Delay utilities */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ── Fade-in on load ──────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes pulseSlow {
    0%, 100% { transform: scale(1); }
    50%       { transform: scale(1.05); }
}

.hero-content {
    animation: fadeInLeft 0.9s ease both;
}

.hero-content .lead {
    animation: fadeInLeft 0.9s ease 0.2s both;
}

.hero-content .d-flex {
    animation: fadeInUp 0.9s ease 0.4s both;
}

/* ── Yellow underline draw ────────────────────────────── */
@keyframes drawLine {
    from { width: 0; }
    to   { width: 60px; }
}

.section-title::after {
    animation: drawLine 0.6s ease 0.3s both;
}

/* ── Button ripple hover pulse ────────────────────────── */
.btn-enactus {
    position: relative;
    overflow: hidden;
}

.btn-enactus::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: inherit;
    transform: scale(0);
    transition: transform 0.4s ease;
}

.btn-enactus:active::after {
    transform: scale(2);
    opacity: 0;
    transition: 0s;
}

/* ── Card hover glow ──────────────────────────────────── */
.project-card,
.stat-card {
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275),
                box-shadow 0.4s ease;
}

/* ── Spinning loader ──────────────────────────────────── */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner-border {
    animation: spin 0.75s linear infinite;
}

/* ── Page transition overlay ──────────────────────────── */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--enactus-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeOut 0.5s ease 0.6s both;
}

@keyframes fadeOut {
    to { opacity: 0; pointer-events: none; }
}

/* ── Shimmer skeleton ─────────────────────────────────── */
@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}

.skeleton {
    background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}