/* Navigation Styles */
.app-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bs-body-bg);
background: -webkit-linear-gradient(180deg, rgba(33, 37, 41, 0.85) 0%, rgba(14, 15, 16, 1) 100%);
background: -moz-linear-gradient(180deg, rgba(33, 37, 41, 0.85) 0%, rgba(14, 15, 16, 1) 100%);
background: linear-gradient(180deg, rgba(33, 37, 41, 0.85) 0%, rgba(14, 15, 16, 1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#212529", endColorstr="#212529", GradientType=0);
    padding: 5px 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    z-index: 101;
    width: 100%;
}

.navbar-nav {
    flex-wrap: wrap;
    justify-content: center;
}
.app-content {
    height: calc(100vh - 60px);
    overflow-y: auto;
    padding-top: 15px;
    padding-left: 15px;
    padding-right: 15px;
    padding-bottom: 60px;
}
.gs-footer-active .app-content {
    padding-bottom: 150px;
}

/* Content Sections */
.content-section {
    display: none;

}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9999;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    color: var(--bs-white);
}
.theme-tabs .nav-item {padding: 0 10px 0 0;}
.theme-tabs .nav-link {
    padding: 0.2rem 1rem;
    border-radius: 30px;
    background: var(--bs-gray-300);
    color: var(--bs-white);
    font-weight: 500;
    font-size: 14px;
}
.theme-tabs .nav-link.active {
    background: var(--bs-white);
    color: var(--bs-gray-100);
}
/* Sticky Library Tabs */
.theme-tabs {
    position: sticky;
    top: var(--bs-navbar-height, 0px);
    z-index: 10;
    background-color: var(--bs-body-bg);
    padding-top: 0.25rem;
}

/* Optional subtle separation */
.theme-tabs::after {
    content: "";
    display: block;
    height: 1px;
    background-color: var(--bs-border-color);
    margin-top: 0.5rem;
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* Section Specific Styles */
.home-section,
.my-course-section,
.guru-section,
.search-section,
.my-fav-section,
.profile-section,
.language-section,
.category-section {
    margin: 0 auto;
}

.section-content h1 {
    color: #333;
    margin-bottom: 1.5rem;
    font-weight: 600;
}
.app-navigation .nav-item.active, .app-navigation .nav-item.active span, .app-navigation .nav-item:hover, .app-navigation .nav-item:hover span {opacity: 1; color: var(--bs-white);}

/* Responsive */
@media (max-width: 768px) {
    .navbar-nav {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }
    
    .nav-link {
        min-width: auto;
        white-space: nowrap;
        font-size: 0.9rem;
        padding: 0.5rem 0.75rem;
    }
    
    .app-navigation {
        padding: 0.3rem 0;
    }
}

@media (min-width: 1200px) {
.theme-tabs .nav-link { font-size: 16px;}

}

@media (min-width: 992px) {
    .app-navigation{bottom: 0;    left: 0;    right: 0;    top: 0; width: 120px; background: var(--bs-body-bg);}
    .app-navigation .container{        height: 100%;        display: flex;        flex-direction: column;}
    .app-content{padding: 0;}
.navbar-expand-lg .footer-nav.navbar-nav{ flex-direction: column;        gap: 30px;        flex-grow: 1;        justify-content: center;}
.app-navigation .main-logo{    padding-right: 10px;    padding-left: 10px; padding-top: 15px;}
.app-navigation .nav-item {opacity: 0.5;}
.app-navigation a.nav-item.nav-link:hover {    transform: scale(1.3);}
.app-navigation .nav-item span{opacity: 0; font-size: 0;}
.app-navigation .nav-item:hover span, .app-navigation .nav-item.active span { opacity: 1; font-size: 11px;}
.app-navigation .nav-item.active, .app-navigation .nav-item.active span, .app-navigation .nav-item:hover, .app-navigation .nav-item:hover span {opacity: 1; color: var(--bs-white); transform: scale(1.2);}
}