:root {
            --iiser-blue: #0a3d62;
            --iiser-gold: #f6b93b;
            --iiser-light: #dfe6e9;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        .navbar-brand img {
            height: 60px;
            transition: var(--transition);
        }
        .nav-link {
            color: var(--iiser-blue) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(10, 61, 98, 0.1);
            color: var(--iiser-blue) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 61, 98, 0.85), rgba(10, 61, 98, 0.9)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            margin-top: 76px;
        }
        .section-title {
            color: var(--iiser-blue);
            border-bottom: 3px solid var(--iiser-gold);
            padding-bottom: 10px;
            display: inline-block;
            margin-bottom: 2rem;
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: var(--transition);
            height: 100%;
            border-radius: 10px;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img-top {
            transform: scale(1.05);
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: var(--iiser-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
        }
        .btn-iiser {
            background-color: var(--iiser-blue);
            color: white;
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid var(--iiser-blue);
        }
        .btn-iiser:hover {
            background-color: transparent;
            color: var(--iiser-blue);
        }
        .btn-iiser-outline {
            background-color: transparent;
            color: var(--iiser-blue);
            border: 2px solid var(--iiser-blue);
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-iiser-outline:hover {
            background-color: var(--iiser-blue);
            color: white;
        }
        footer {
            background-color: #1a1a2e;
            color: #eee;
        }
        .friendlink {
            background-color: #16213e;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: rgba(255,255,255,0.1);
            color: #ddd;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
        }
        .flink:hover {
            background: var(--iiser-gold);
            color: #000;
            transform: translateY(-3px);
        }
        .news-item {
            border-left: 4px solid var(--iiser-gold);
            padding-left: 15px;
            margin-bottom: 25px;
            transition: var(--transition);
        }
        .news-item:hover {
            border-left-color: var(--iiser-blue);
            padding-left: 20px;
        }
        .campus-life-img {
            height: 250px;
            object-fit: cover;
            border-radius: 10px;
            transition: var(--transition);
        }
        .campus-life-img:hover {
            transform: scale(1.03);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--iiser-blue);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
        }
        .research-card {
            border-top: 5px solid var(--iiser-gold);
        }
        .accordion-button {
            font-weight: 600;
            color: var(--iiser-blue);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(10, 61, 98, 0.1);
            color: var(--iiser-blue);
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .contact-info li {
            margin-bottom: 15px;
            padding-left: 30px;
            position: relative;
        }
        .contact-info li i {
            position: absolute;
            left: 0;
            top: 5px;
            color: var(--iiser-blue);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
                margin-top: 66px;
            }
            .navbar-brand img {
                height: 50px;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }