/* ============================================
   ZETRE - Desktop Common Styles (min-width: 768px)
   Professional website layout with top nav
   ============================================ */

/* ---- Hide Mobile Elements on Desktop ---- */
.mobile-top-bar,
.mobile-nav-overlay,
.mobile-nav-drawer,
.bottom-nav {
    display: none !important;
}


/* ---- Desktop Header / Top Navigation ---- */
.desktop-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 86px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.desktop-header.scrolled {
    height: 72px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
    border-bottom: 1px solid var(--gray-100);
}

.desktop-header .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-8);
}

.desktop-header .logo {
    display: inline-flex;
    align-items: center;
    max-height: 52px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.desktop-header .logo-img {
    height: 48px;
    max-height: 48px;
    width: auto;
    object-fit: contain;
}

.desktop-header .logo span {
    color: var(--primary-500);
}

.desktop-header .logo:hover {
    transform: scale(1.02);
}

/* Desktop Navigation Links */
.desktop-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
    margin-right: var(--space-4);
}

.desktop-nav .nav-link {
    padding: var(--space-2) var(--space-4);
    color: var(--gray-800);
    font-weight: 700;
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    letter-spacing: 0.02em;
}

.desktop-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.desktop-nav .nav-link:hover {
    color: var(--primary-700);
    background: var(--primary-50);
}

.desktop-nav .nav-link:hover::after {
    width: 60%;
}

.desktop-nav .nav-link.active {
    color: var(--primary-700);
    font-weight: 800;
}

.desktop-nav .nav-link.active::after {
    width: 60%;
}

.desktop-header .header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.desktop-header .btn-contact {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-green);
}

.desktop-header .btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-green-lg);
}

/* ---- Desktop Content Area ---- */
.main-content {
    padding-top: 80px; /* Account for desktop header */
}

/* ---- Desktop Typography ---- */
h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }

.section-header h2 {
    font-size: var(--text-4xl);
}

.section-header p {
    font-size: var(--text-lg);
}

/* ---- Desktop Sections ---- */
.section {
    padding: var(--space-20) 0;
}

/* ---- Desktop Container ---- */
.container {
    padding: 0 var(--space-8);
}

/* ---- Desktop Footer ---- */
.footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
}

.footer-bottom {
    flex-direction: row;
}

/* ---- Desktop Hover Effects ---- */
.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2xl);
}

/* ---- Desktop Button ---- */
.btn-lg {
    width: auto;
}

/* ---- Desktop Back to Top ---- */
.back-to-top {
    bottom: 40px;
    right: 40px;
}