/* Navigation */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: all var(--transition-normal);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 10px 0;
    border-bottom-color: var(--border-color);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary) !important;
}

.brand-icon {
    font-size: 1.8rem;
}

.brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 8px 16px !important;
    margin: 0 4px;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-primary) !important;
    background: var(--bg-card);
}

.navbar-toggler {
    border: none;
    padding: 8px;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28248, 250, 252, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Language Switcher */
.lang-switcher .btn {
    color: var(--text-secondary);
    border-color: var(--border-color);
    font-size: 0.85rem;
}

.lang-switcher .btn:hover {
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.lang-switcher .dropdown-menu {
    background: var(--bg-card);
    border-color: var(--border-color);
    min-width: 140px;
}

.lang-switcher .dropdown-item {
    color: var(--text-secondary);
    padding: 8px 16px;
}

.lang-switcher .dropdown-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* Main Content */
#mainContent {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
}

/* Footer */
.footer {
    background: var(--bg-darker);
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
}

.footer p, .footer a {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer a:hover {
    color: var(--primary-color);
}

/* Page Transitions */
.page-section {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.page-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 991px) {
    .navbar-collapse {
        background: var(--bg-card);
        margin-top: 15px;
        padding: 20px;
        border-radius: var(--border-radius);
        border: 1px solid var(--border-color);
    }
    
    .lang-switcher {
        margin-top: 15px;
        margin-left: 0 !important;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    #mainContent {
        padding-top: 70px;
    }
}