/* ================================================
   PREMIUM UX ENHANCEMENTS v1.0
   Features: Expertise Tooltips, WhatsApp FAB,
   Timeline Scroll, Hero Parallax, Counter Glow
   ================================================ */

/* ── 1. EXPERTISE HOVER TOOLTIPS ─────────────────── */
.expertise-card {
    position: relative;
}

.expertise-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--bg-dark, #0A1628);
    color: #fff;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-family: var(--font-b, 'Manrope', sans-serif);
    line-height: 1.5;
    max-width: 320px;
    white-space: normal;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 50;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(0, 180, 216, 0.2);
}

.expertise-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--bg-dark, #0A1628);
}

.expertise-card:hover .expertise-tooltip,
.expertise-card:focus-within .expertise-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.expertise-tooltip .tooltip-label {
    display: block;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--teal, #00B4D8);
    margin-bottom: 4px;
    font-weight: 700;
}

@media (max-width: 768px) {
    .expertise-tooltip {
        display: none;
    }
}

/* ── 2. WHATSAPP FLOATING BUTTON ─────────────────── */
.whatsapp-float {
    position: fixed;
    bottom: 100px;
    right: 24px;
    z-index: 900;
    display: flex;
    align-items: center;
    gap: 10px;
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
}

.whatsapp-float.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.whatsapp-float-label {
    background: #fff;
    color: #1a1a1a;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font-b, 'Manrope', sans-serif);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
    white-space: nowrap;
    opacity: 0;
    transform: translateX(10px);
    transition: opacity 0.3s ease 0.1s, transform 0.3s ease 0.1s;
}

.whatsapp-float:hover .whatsapp-float-label {
    opacity: 1;
    transform: translateX(0);
}

.whatsapp-float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 4px 18px rgba(37, 211, 102, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.whatsapp-float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
}

.whatsapp-float-btn svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}

@keyframes whatsappPulse {
    0%, 100% { box-shadow: 0 4px 18px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 18px rgba(37, 211, 102, 0.4), 0 0 0 12px rgba(37, 211, 102, 0.1); }
}

.whatsapp-float-btn {
    animation: whatsappPulse 2.5s ease-in-out infinite;
}

.whatsapp-float-btn:hover {
    animation: none;
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 80px;
        right: 16px;
    }
    .whatsapp-float-label {
        display: none;
    }
    .whatsapp-float-btn {
        width: 50px;
        height: 50px;
    }
    .whatsapp-float-btn svg {
        width: 24px;
        height: 24px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .whatsapp-float-btn {
        animation: none;
    }
}

/* ── 3. ENHANCED TIMELINE SCROLL ANIMATION ──────── */
.timeline-item {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-item:nth-child(even) {
    transform: translateX(40px);
}

.timeline-item:nth-child(even).visible {
    transform: translateX(0);
}

.timeline-item .timeline-dot {
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s,
                box-shadow 0.5s ease 0.2s;
    transform: scale(0);
}

.timeline-item.visible .timeline-dot {
    transform: scale(1);
}

.timeline-item.visible .timeline-dot.active {
    box-shadow: 0 0 0 6px rgba(0, 180, 216, 0.2),
                0 0 20px rgba(0, 180, 216, 0.3);
}

.timeline-item .timeline-year {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease 0.3s, transform 0.4s ease 0.3s;
}

.timeline-item.visible .timeline-year {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item .timeline-title,
.timeline-item .timeline-institution {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease 0.45s, transform 0.4s ease 0.45s;
}

.timeline-item.visible .timeline-title,
.timeline-item.visible .timeline-institution {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item .timeline-desc {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease 0.55s, transform 0.4s ease 0.55s;
}

.timeline-item.visible .timeline-desc {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .timeline-item,
    .timeline-item:nth-child(even) {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .timeline-item .timeline-dot {
        transform: scale(1);
        transition: none;
    }
    .timeline-item .timeline-year,
    .timeline-item .timeline-title,
    .timeline-item .timeline-institution,
    .timeline-item .timeline-desc {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ── 4. HERO PARALLAX DEPTH ──────────────────────── */
.hero {
    overflow: hidden;
}

.hero-image-wrapper {
    transition: transform 0.1s linear;
    will-change: transform;
}

.hero-content {
    transition: transform 0.1s linear;
    will-change: transform;
}

.hero-glow-orb {
    transition: transform 0.15s linear;
    will-change: transform;
}

/* ── 5. COUNTER GLOW EFFECT ──────────────────────── */
@keyframes counterGlow {
    0% { text-shadow: none; }
    50% { text-shadow: 0 0 20px rgba(0, 180, 216, 0.4), 0 0 40px rgba(0, 180, 216, 0.15); }
    100% { text-shadow: none; }
}

.stat-number.counting {
    animation: counterGlow 1.6s ease-out;
}

/* ── 6. SCROLL PROGRESS BAR ENHANCEMENT ──────────── */
#scroll-progress {
    background: linear-gradient(90deg, #00B4D8, #48CAE4, #00B4D8) !important;
    background-size: 200% 100% !important;
    animation: progressShimmer 3s linear infinite !important;
}

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

/* ── 7. TRUST STRIP GLOW LINES ───────────────────── */
.trust-strip {
    position: relative;
}

.trust-strip::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 180, 216, 0.3), transparent);
}

.trust-strip::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 180, 216, 0.15), transparent);
}