/* ============================================================
   PENTASYSAI — LAYOUT
   Header, mega navigation, footer, and page structure.
   ============================================================ */

/* ——— HEADER ——— */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: rgba(15, 23, 42, 0.12);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

/* ——— LOGO ——— */
.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* ——— MAIN NAV ——— */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: var(--space-5);
    right: var(--space-5);
    height: 2px;
    background: var(--neon-cyan);
    border-radius: var(--radius-full);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--neon-cyan);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link .dropdown-arrow {
    font-size: 0.65em;
    transition: transform var(--transition-fast);
}

.nav-item:hover .dropdown-arrow,
.nav-item.open .dropdown-arrow {
    transform: rotate(180deg);
}

/* ——— MEGA DROPDOWN ——— */
.mega-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 580px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.06), var(--glow-cyan);
    padding: var(--space-6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

.nav-item:hover .mega-dropdown,
.nav-item.open .mega-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.mega-dropdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
}

.mega-dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mega-dropdown-item:hover {
    background: rgba(var(--neon-cyan-rgb), 0.05);
}

.mega-dropdown-item .dd-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.mega-dropdown-item .dd-icon.cyber-icon {
    background: rgba(var(--neon-cyan-rgb), 0.1);
    color: var(--neon-cyan);
}

.mega-dropdown-item .dd-icon.dev-icon {
    background: rgba(var(--dev-indigo-rgb), 0.1);
    color: var(--dev-indigo);
}

.mega-dropdown-item .dd-icon.marketing-icon {
    background: rgba(var(--mkt-rose-rgb), 0.1);
    color: var(--mkt-rose);
}

.mega-dropdown-item .dd-text h4 {
    font-family: var(--font-body);
    font-size: var(--fs-small);
    font-weight: 700;
    text-transform: none;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.mega-dropdown-item .dd-text p {
    font-size: var(--fs-xs);
    color: var(--text-dim);
    margin: 0;
    line-height: 1.4;
}

.mega-dropdown-header {
    padding: var(--space-2) var(--space-4) var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    color: var(--text-dim);
    border-bottom: 1px solid rgba(15, 23, 42, 0.06);
    margin-bottom: var(--space-2);
}

.mega-dropdown-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    text-align: center;
}

.mega-dropdown-footer a {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: var(--ls-wide);
    transition: color var(--transition-fast);
}

.mega-dropdown-footer a:hover {
    color: var(--text-white);
}

/* ——— HEADER CTA BUTTON ——— */
.header-cta {
    margin-left: var(--space-5);
}

/* ——— MOBILE MENU TOGGLE ——— */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    cursor: pointer;
    z-index: calc(var(--z-header) + 10);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.menu-toggle span:nth-child(1) { transform: translateY(-6px); }
.menu-toggle span:nth-child(3) { transform: translateY(6px); }

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(0, 0);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0, 0);
}


/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    position: relative;
    z-index: 10;
    background: var(--bg-deep);
    border-top: 1px solid var(--glass-border);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: var(--space-8);
    padding: var(--space-20) 0 var(--space-12);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: var(--fs-small);
    line-height: var(--lh-relaxed);
    margin-top: var(--space-5);
    max-width: 320px;
}

.footer-certifications {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-5);
    flex-wrap: wrap;
}

.footer-cert-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 6px 14px;
    background: rgba(var(--neon-gold-rgb), 0.05);
    border: 1px solid rgba(var(--neon-gold-rgb), 0.2);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--neon-gold);
    letter-spacing: 1px;
}

.footer-heading {
    font-family: var(--font-display);
    font-size: var(--fs-small);
    color: var(--text-white);
    text-transform: uppercase;
    letter-spacing: var(--ls-wide);
    margin-bottom: var(--space-6);
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    color: var(--text-muted);
    font-size: var(--fs-small);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-links a:hover {
    color: var(--neon-cyan);
    transform: translateX(4px);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    color: var(--text-muted);
    font-size: var(--fs-small);
}

.footer-contact li i {
    color: var(--neon-cyan);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-contact li a {
    color: var(--text-muted);
}
.footer-contact li a:hover {
    color: var(--neon-cyan);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(15, 23, 42, 0.1);
    color: var(--text-muted);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.footer-social a:hover {
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
    background: rgba(var(--neon-cyan-rgb), 0.1);
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(var(--neon-cyan-rgb), 0.15);
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) 0;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    font-size: var(--fs-xs);
    color: var(--text-dim);
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-6);
}

.footer-bottom-links a {
    color: var(--text-dim);
    font-size: var(--fs-xs);
}
.footer-bottom-links a:hover {
    color: var(--neon-cyan);
}


/* ============================================================
   PAGE CONTENT OFFSET (below fixed header)
   ============================================================ */
.page-content {
    padding-top: var(--header-height);
}