:root {
            --iiser-blue: #002147;
            --iiser-gold: #D4AF37;
            --iiser-light: #F8F9FA;
            --iiser-dark: #343A40;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--iiser-blue) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            color: var(--iiser-gold) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 33, 71, 0.85), rgba(0, 33, 71, 0.9)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-section h1 { font-size: 2.5rem; }
            .hero-section { padding: 100px 0; }
        }
        .section-title {
            color: var(--iiser-blue);
            border-left: 5px solid var(--iiser-gold);
            padding-left: 15px;
            margin-bottom: 30px;
        }
        .card-hover {
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            border: none;
            border-radius: 10px;
            overflow: hidden;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 33, 71, 0.15) !important;
        }
        .faculty-img {
            height: 220px;
            object-fit: cover;
            border-bottom: 3px solid var(--iiser-gold);
        }
        .news-card {
            border-left: 4px solid var(--iiser-blue);
            transition: all 0.3s ease;
        }
        .news-card:hover {
            background-color: #f8f9fa;
            transform: translateX(5px);
        }
        .btn-iiser {
            background-color: var(--iiser-blue);
            color: white;
            padding: 12px 28px;
            border-radius: 4px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-iiser:hover {
            background-color: var(--iiser-gold);
            color: var(--iiser-blue);
            transform: scale(1.05);
        }
        .campus-life-item {
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .flink {
            display: inline-block;
            padding: 10px 20px;
            background: #f1f5f9;
            border-radius: 6px;
            margin: 8px;
            color: #334155;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #e2e8f0;
        }
        .flink:hover {
            background: var(--iiser-blue);
            color: white;
            transform: translateY(-3px);
            border-color: var(--iiser-blue);
        }
        footer {
            background-color: #1a1a2e;
            color: #e9ecef;
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: white;
        }
        .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(--iiser-gold);
            color: var(--iiser-blue);
            transform: rotate(15deg);
        }
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 12px;
            height: 12px;
            background: var(--iiser-gold);
            border-radius: 50%;
        }
        .timeline-item:after {
            content: '';
            position: absolute;
            left: 5px;
            top: 8px;
            height: 100%;
            width: 2px;
            background: #dee2e6;
        }
        .timeline-item:last-child:after {
            display: none;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--iiser-blue);
            line-height: 1;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
            width: 50px;
            height: 50px;
            background: var(--iiser-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s ease;
        }
        .back-to-top.visible {
            opacity: 1;
        }
        .back-to-top:hover {
            background: var(--iiser-gold);
            color: var(--iiser-blue);
            transform: translateY(-5px);
        }