/* ================================================================
   CVD INFRA — ANIMATIONS & RESPONSIVE
   ================================================================ */

/* ── KEYFRAMES ───────────────────────────────────────────────── */
@keyframes preloaderPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.4);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 12px rgba(212, 175, 55, 0);
    }
}

@keyframes preloaderLoad {
    0% {
        width: 0%;
    }

    100% {
        width: 100%;
    }
}

@keyframes scrollWheel {
    0% {
        transform: translateY(0);
        opacity: 1;
    }

    60% {
        transform: translateY(12px);
        opacity: 0;
    }

    61% {
        transform: translateY(-4px);
        opacity: 0;
    }

    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    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 zoomIn {
    from {
        opacity: 0;
        transform: scale(0.85);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-12px);
    }
}

@keyframes shine {
    0% {
        background-position: -200% center;
    }

    100% {
        background-position: 200% center;
    }
}

@keyframes pulse-gold {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.5);
    }

    50% {
        box-shadow: 0 0 0 12px rgba(212, 175, 55, 0);
    }
}

@keyframes rotateIn {
    from {
        transform: rotate(-10deg) scale(0.8);
        opacity: 0;
    }

    to {
        transform: rotate(0) scale(1);
        opacity: 1;
    }
}

@keyframes slideInBottom {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ── UTILITY ANIMATION CLASSES ───────────────────────────────── */
.animate-float {
    animation: float 4s ease-in-out infinite;
}

.animate-pulse-gold {
    animation: pulse-gold 2.5s ease-in-out infinite;
}

/* Intersection Observer driven animations (applied via JS) */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.revealed, .reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Shimmer loading skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--cvd-gray-100) 25%, var(--cvd-gray-50) 50%, var(--cvd-gray-100) 75%);
    background-size: 400% 100%;
    animation: shine 1.5s linear infinite;
    border-radius: 0.5rem;
}

/* Page transition overlay */
.page-transition-overlay {
    position: fixed;
    inset: 0;
    background: var(--cvd-navy);
    z-index: 9998;
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.76, 0, 0.24, 1);
    pointer-events: none;
}

.page-transition-overlay.entering {
    transform: translateY(0);
}

.page-transition-overlay.leaving {
    transform: translateY(-100%);
}

/* ── RESPONSIVE BREAKPOINTS ──────────────────────────────────── */

/* ── xl: 1280px ───────────────────────────────────────────────── */
@media (max-width: 1280px) {
    .services-detail-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .why-choose-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ── lg: 1024px ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
    :root {
        --section-py: 3.5rem;
    }

    .header-topbar {
        display: none;
    }

    .header-main .container {
        min-height: 64px;
    }

    .site-main {
        padding-top: 64px !important;
    }

    .header-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .header-cta {
        display: none;
    }

    /* Mobile nav */
    .header-nav.mobile-open {
        display: block;
        position: fixed;
        top: 64px;
        left: 0;
        width: 280px;
        height: calc(100vh - 64px);
        background: var(--cvd-white);
        box-shadow: var(--shadow-xl);
        overflow-y: auto;
        z-index: var(--z-sticky);
        padding: 1rem;
        animation: slideInBottom 0.3s ease;
    }

    .header-nav.mobile-open .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }

    .header-nav.mobile-open .nav-menu>li>a {
        padding: 0.75rem 1rem;
        border-radius: 0.5rem;
    }

    .header-nav.mobile-open .nav-menu>li>a::after {
        display: none;
    }

    .header-nav.mobile-open .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--cvd-gray-50);
        border-radius: 0.5rem;
        margin-top: 0.25rem;
        padding: 0.25rem 0;
        display: none;
    }

    .header-nav.mobile-open .nav-menu>li.open>.sub-menu {
        display: block;
    }

    .mobile-nav-overlay {
        display: block;
    }

    /* About grid */
    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-intro-image {
        order: 2;
    }

    .about-intro-content {
        order: 1;
    }

    .about-intro-badge {
        right: 1rem;
    }

    /* Services */
    .services-overview-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .services-detail-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Why choose */
    .why-choose-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Process */
    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-connector {
        display: none;
    }

    /* Projects */
    .projects-grid,
    .projects-isotope-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Certs */
    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Blog */
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    /* Gallery */
    .gallery-isotope-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Team */
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* Careers */
    .careers-benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Contact */
    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-main-grid {
        grid-template-columns: 1fr;
    }

    /* Quote */
    .quote-grid {
        grid-template-columns: 1fr;
    }

    /* MV */
    .mv-grid {
        grid-template-columns: 1fr;
    }
}

/* ── md: 768px ────────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --section-py: 3rem;
    }

    h1 {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    h2 {
        font-size: clamp(1.375rem, 6vw, 2rem);
    }

    .hero-section {
        padding-top: 80px;
        min-height: 100dvh;
    }

    .hero-stats {
        gap: 1rem;
        padding: 1rem;
    }

    .hero-stat-number {
        font-size: 1.375rem;
    }

    .hero-stat-divider {
        height: 28px;
    }

    .why-choose-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-detail-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-timeline {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid,
    .projects-isotope-grid {
        grid-template-columns: 1fr;
    }

    .blog-grid {
        grid-template-columns: 1fr;
    }

    .gallery-isotope-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-values-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .certs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }

    .newsletter-inner {
        flex-direction: column;
    }

    .newsletter-form {
        min-width: 100%;
    }

    .form-grid-2 {
        grid-template-columns: 1fr;
    }

    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    .quick-contact-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        justify-content: center;
    }

    .services-tabs-nav {
        top: 64px;
    }
}

/* ── sm: 480px ────────────────────────────────────────────────── */
@media (max-width: 480px) {
    :root {
        --section-py: 2.5rem;
    }

    .container {
        padding: 0 1rem;
    }

    .why-choose-grid {
        grid-template-columns: 1fr;
    }

    .services-detail-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .gallery-isotope-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .careers-benefits-grid {
        grid-template-columns: 1fr;
    }

    .page-hero {
        padding: 6rem 0 3rem;
    }

    .floating-buttons {
        right: 1rem;
    }

    .back-to-top {
        right: 1rem;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .hero-stat-divider {
        display: none;
    }
}

/* ── DARK MODE STYLES ─────────────────────────────────────────── */
[data-theme="dark"] body {
    color: var(--cvd-gray-200);
}

[data-theme="dark"] .header-main {
    background: rgba(15, 23, 42, 0.97);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .cvd-header.scrolled .header-main {
    background: rgba(15, 23, 42, 0.98);
}

[data-theme="dark"] .text-logo .logo-cvd {
    color: var(--cvd-white);
}

[data-theme="dark"] .nav-menu>li>a {
    color: var(--cvd-gray-200);
}

[data-theme="dark"] .nav-menu>li>a:hover {
    color: var(--cvd-white);
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .sub-menu {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .sub-menu li a {
    color: var(--cvd-gray-200);
}

[data-theme="dark"] .sub-menu li a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--cvd-white);
}

[data-theme="dark"] .hamburger-line {
    background: var(--cvd-white);
}

[data-theme="dark"] .mobile-menu-toggle {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .why-card,
[data-theme="dark"] .service-detail-card,
[data-theme="dark"] .blog-card,
[data-theme="dark"] .project-card,
[data-theme="dark"] .cert-card,
[data-theme="dark"] .team-card,
[data-theme="dark"] .job-card,
[data-theme="dark"] .mv-card,
[data-theme="dark"] .contact-info-card,
[data-theme="dark"] .careers-benefit-card,
[data-theme="dark"] .quote-contact-card,
[data-theme="dark"] .about-intro-badge {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .bg-gray {
    background-color: #0f172a;
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--cvd-white);
}

[data-theme="dark"] .section-title {
    color: var(--cvd-white);
}

[data-theme="dark"] .section-label {
    opacity: 0.95;
}

[data-theme="dark"] .filter-btn {
    background: #1e293b;
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--cvd-gray-200);
}

[data-theme="dark"] .filter-btn.active,
[data-theme="dark"] .filter-btn:hover {
    background: var(--cvd-navy);
    border-color: var(--cvd-navy);
    color: var(--cvd-white);
}

[data-theme="dark"] .cvd-footer {
    background: #020c1e;
}

[data-theme="dark"] .footer-newsletter {
    background: #071224;
}

/* ── PRINT STYLES ─────────────────────────────────────────────── */
@media print {

    .cvd-header,
    .floating-buttons,
    .back-to-top,
    .cvd-preloader,
    .cvd-footer {
        display: none !important;
    }

    .site-main {
        padding-top: 0 !important;
    }

    body {
        font-size: 12pt;
        color: #000;
    }

    a[href]::after {
        content: " ("attr(href) ")";
        font-size: 10pt;
    }
}

/* ── REDUCED MOTION ───────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cvd-preloader {
        display: none !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ── FOCUS VISIBLE (A11Y) ─────────────────────────────────────── */
:focus-visible {
    outline: 3px solid var(--cvd-gold);
    outline-offset: 3px;
    border-radius: 3px;
}