/* --- General & Typography --- */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #f8f9fa;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
        }

        a {
            color: #0d6efd;
            text-decoration: none;
        }

        a:hover {
            color: #0a58ca;
            text-decoration: underline;
        }
        
        .text-dark-blue {
            color: #003d4f;
        }

        /* --- New Header (Springer Style) --- */
        .top-bar {
            background-color: #fff;
            border-bottom: 1px solid #e0e0e0;
            padding: 0.5rem 0;
            font-size: 0.85rem;
        }
        
        .springer-logo {
            font-size: 1.2rem;
            font-weight: 300;
        }
        
        .springer-logo strong {
            font-weight: 700;
        }
        
        .top-bar a {
            color: #333;
        }

        .header-main-nav {
            background-color: #fff;
            border-bottom: 1px solid #e0e0e0;
            padding: 0.75rem 0;
        }
        
        .header-main-nav .nav-link {
            color: #333;
            margin-right: 1.5rem;
        }
        
        .header-main-nav .search-form {
            position: relative;
            width: 250px;
        }
        
        .header-main-nav .form-control {
            padding-left: 2.5rem;
        }
        
        .header-main-nav .search-icon {
            position: absolute;
            left: 0.75rem;
            top: 50%;
            transform: translateY(-50%);
            color: #6c757d;
        }

        .hero-section {
            /* Updated with lateral gradient */
            background: linear-gradient(to right, #003d4f, #002d3a);
            color: #fff;
            padding: 2rem 0;
        }
        
        .hero-section .breadcrumb-item,
        .hero-section .breadcrumb-item a,
        .hero-section .breadcrumb-item.active {
            color: #fff;
            font-size: 0.9rem;
        }
        
        .hero-section .breadcrumb-item a:hover {
            text-decoration: underline;
        }
        
        .hero-section .publication-brand {
            font-size: 1.5rem;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .journal-cover {
            max-height: 270px;
            border: 3px solid #fff;
        }
        
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 700;
        }
        
        .hero-section .subtitle {
            font-size: 1rem;
            font-weight: 300;
            margin-bottom: 1.5rem;
        }


    @media (768px <= width <= 991.98px) {
      /* Styles for screens between 768px and 1024px (inclusive) */
      .hero-section .main-content {
            padding-left: 4rem;
            /* background-color: rgba(0, 61, 79, 0.8); /* Semi-transparent teal */
            /* border-radius: 8px;
            max-width: 600px;
            margin: auto; */
        }
    }


        .hero-section .bullets {
            margin-bottom: 0.5rem;
        }
        
        .hero-section .btn-submit {
            background-color: #fff;
            color: #003d4f;
            font-weight: 600;
            padding: 0.5rem 1.rem;
            border-radius: 50px;
            font-size: 0.8rem;
        }
        
        .hero-section .btn-submit:hover {
            background-color: #f0f0f0;
        }
        
        .hero-bottom-links {
            padding: 1rem 0;
            background-color: #002d3a; /* Slightly darker teal */
        }
        
        .hero-bottom-links a {
            color: #fff;
            margin-right: 2rem;
            font-weight: 500;
            text-decoration: underline;
        }

        /* --- Secondary Journal Navigation --- */
        .journal-nav {
            background-color: #fff;
            border-bottom: 1px solid #dee2e6;
        }
        
        .journal-nav .nav-link {
            color: #333;
            padding: 1rem 1.25rem;
            font-weight: 500;
        }
        
        .journal-nav .nav-link.active,
        .journal-nav .nav-link:hover {
            color: #003d4f;
            border-bottom: 3px solid #003d4f;
        }

        /* --- Overview Section --- */
        .overview-section {
            padding: 2.5rem 0;
            background-color: #fff;
        }
        .overview-section h2 {
            margin-bottom: 1rem;
        }
        .overview-section ul {
            list-style-type: none;
            padding-left: 0;
        }
        .overview-section ul li {
            padding-left: 1.5rem;
            position: relative;
            margin-bottom: 0.5rem;
        }
        .overview-section ul li::before {
            content: '•';
            color: #0d6efd;
            font-weight: bold;
            display: inline-block; 
            width: 1em;
            margin-left: -1.5em;
            position: absolute;
            top: 0;
        }

        /* --- Main Content & Articles --- */
        .latest-articles-section {
            padding-top: 2.5rem;
            padding-bottom: 3rem;
        }

        .article-item {
            display: flex;
            align-items: flex-start;
            border-bottom: 1px solid #e9ecef;
            padding-top: 1.5rem;
            padding-bottom: 1.5rem;
        }

        .article-item:last-of-type {
            border-bottom: none;
        }
        
        .article-content {
            flex-grow: 1;
            padding-right: 1.5rem;
        }

        .article-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .article-title a {
           color: #212529;
        }
        
        .article-title a:hover {
           color: #0d6efd;
           text-decoration: none;
        }

        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        
        .article-meta .article-type {
            font-weight: 600;
        }

        .article-thumbnail img {
            max-width: 150px;
            height: auto;
            border-radius: 4px;
            border: 1px solid #dee2e6;
        }

        /* --- Sidebar --- */
        .sidebar .card {
            border: 1px solid #dee2e6;
            border-radius: .25rem;
        }

        .sidebar .card-header {
            font-weight: 600;
            background-color: #f8f9fa;
        }
        
        .metric-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.95rem;
        }

        .metric-item .value {
            font-weight: 700;
            font-size: 1.1rem;
        }
        
        .metric-item .icon {
            font-size: 1.5rem;
            color: #6c757d;
            margin-right: 1rem;
        }
        
        .metric-item .text-muted {
            font-size: 0.85rem;
        }

        
        .logo-home img.logo-image {
            width: 90%;
            /* max-width: 450px; */
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            border-radius: 8px;
            transition: transform 0.3s ease;
        }

        .logo-home img.logo-image:hover {
            transform: scale(1.03);
        }

        /* --- Footer --- */
        .footer-main {
            /* Updated with lateral gradient */
            background: linear-gradient(to right, #003d4f, #002d3a);
            color: #ffffff;
            padding: 3rem 0;
        }

        .footer-main h5 {
            font-weight: 700;
            margin-bottom: 1.25rem;
            text-transform: uppercase;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
            color: #fff;
        }
        
        .footer-main p, .footer-main li {
            color: #e0e0e0;
        }

        .footer-main a {
            color: #ffffff;
            font-size: 0.9rem;
        }

        .footer-main a:hover {
            text-decoration: underline;
        }

        .footer-main .form-control {
            border-radius: 0;
        }

        .footer-main .btn-get-alerts {
            background-color: #fff;
            color: #003d4f;
            border: 0;
            border-radius: 0;
            width: 100%;
            font-weight: 600;
        }

        .footer-main .btn-get-alerts:hover {
            background-color: #e9ecef;
        }

        .footer-main .list-unstyled li {
            margin-bottom: 0.5rem;
        }
        
        .footer-copyright {
            background-color: #001f29; /* Darker shade of teal */
            color: #e0e0e0;
            padding: 1rem 0;
            font-size: 0.8rem;
        }

        /* --- Responsive Adjustments --- */
        @media (max-width: 991.98px) {
            .sidebar {
                margin-top: 2rem;
            }
            .hero-section h1 {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 767.98px) {
            .hero-section {
                text-align: center;
            }
            .hero-section .row {
                flex-direction: column;
            }
            .hero-section .journal-cover {
                margin: 0 auto 1.5rem auto;
            }
            .article-item {
                flex-direction: column;
            }
            .article-thumbnail {
                margin-top: 1rem;
                width: 100%;
            }
            .article-thumbnail img {
                max-width: 100%;
            }
        }