/* Corporate clean lines */
.hero-section {
    background-image:
        linear-gradient(to bottom, rgba(10, 16, 26, 0) 0%, rgba(10, 16, 26, 0.4) 55%, rgba(10, 16, 26, 0.72) 75%, rgba(10, 16, 26, 0.9) 100%),
        linear-gradient(to right, rgba(15, 23, 42, 0.9) 0%, rgba(30, 64, 175, 0.85) 35%, rgba(15, 23, 42, 0.6) 70%, rgba(51, 65, 85, 0.5) 100%),
        url('../Image/pic6.avif');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

/* Page Transition Fade Effect */
html {
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}

html.fade-out {
    opacity: 0;
}

body {
    transition: background-color 0.3s ease;
}

/* Mobile adjustment for background */
@media (max-width: 768px) {
    .hero-section {
        background-attachment: scroll;
        background-position: center center;
    }
}

.card-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.15);
}

/* Nav Transition */
#main-nav {
    transition: background-color 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}

/* Active Nav Link Styling with underline */
.nav-link {
    position: relative;
    padding-bottom: 8px;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: #1e40af;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active,
.nav-link.active-nav-link {
    color: #1e40af !important;
    font-weight: bold;
}

.nav-link.active::after,
.nav-link.active-nav-link::after {
    width: 100%;
    background-color: #1e40af;
}

/* For mobile active states in menu */
#mobile-menu .nav-link.active,
#mobile-menu .nav-link.active-nav-link {
    background-color: rgba(30, 64, 175, 0.1);
    border-left: 4px solid #1e40af;
    padding-left: calc(0.75rem - 4px);
}

#mobile-menu .nav-link.active::after,
#mobile-menu .nav-link.active-nav-link::after {
    display: none;
}