:root {
            --nipb-green: #2a6e3f;
            --nipb-light-green: #4caf50;
            --nipb-gold: #d4af37;
            --nipb-dark: #1e3a29;
            --bs-primary: var(--nipb-green);
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            line-height: 1.7;
            padding-top: 76px;
        }
        h1, h2, h3, h4, h5, .navbar-brand {
            font-weight: 600;
            color: var(--nipb-dark);
        }
        .bg-nipb {
            background-color: var(--nipb-green) !important;
        }
        .text-nipb {
            color: var(--nipb-green) !important;
        }
        .border-nipb {
            border-color: var(--nipb-green) !important;
        }
        .btn-primary {
            background-color: var(--nipb-green);
            border-color: var(--nipb-green);
        }
        .btn-primary:hover, .btn-primary:focus {
            background-color: var(--nipb-dark);
            border-color: var(--nipb-dark);
        }
        .btn-outline-primary {
            color: var(--nipb-green);
            border-color: var(--nipb-green);
        }
        .btn-outline-primary:hover {
            background-color: var(--nipb-green);
            border-color: var(--nipb-green);
        }
        .navbar {
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            transition: all 0.3s ease;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 0 2px;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background-color: rgba(42, 110, 63, 0.1);
            color: var(--nipb-green) !important;
        }
        .hero {
            background: linear-gradient(rgba(30, 58, 41, 0.85), rgba(42, 110, 63, 0.9)), url('https://images.unsplash.com/photo-1592210454359-9043f067919b?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 6rem 0;
            margin-bottom: 4rem;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 2.5rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: var(--nipb-gold);
        }
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0,0,0,0.07);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.12);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
        }
        .research-icon {
            font-size: 2.5rem;
            color: var(--nipb-green);
            margin-bottom: 1rem;
        }
        .flink {
            display: inline-block;
            background: #f8f9fa;
            color: #495057;
            padding: 10px 20px;
            margin: 5px;
            border-radius: 6px;
            text-decoration: none;
            border: 1px solid #dee2e6;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--nipb-green);
            color: white;
            border-color: var(--nipb-green);
            transform: scale(1.03);
        }
        footer {
            background-color: var(--nipb-dark);
            color: #e9ecef;
        }
        footer a {
            color: #b8d4c0;
            text-decoration: none;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        .social-icon:hover {
            background: var(--nipb-light-green);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--nipb-green);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--nipb-dark);
            color: white;
        }
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 2rem;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--nipb-green);
        }
        .timeline-item:after {
            content: '';
            position: absolute;
            left: 5px;
            top: 25px;
            width: 2px;
            height: calc(100% + 1rem);
            background: #dee2e6;
        }
        .timeline-item:last-child:after {
            display: none;
        }
        .map-container {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 6px 15px rgba(0,0,0,0.08);
        }
        @media (max-width: 768px) {
            body { padding-top: 70px; }
            .hero { padding: 4rem 0; }
            .display-4 { font-size: 2.5rem; }
        }