:root {
            --primary-blue: #1a73e8;
            --ocean-teal: #00bcd4;
            --coral-pink: #ff6b6b;
            --sea-green: #4caf50;
            --deep-purple: #673ab7;
        }
        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(45deg, var(--primary-blue), var(--ocean-teal));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 115, 232, 0.8), rgba(0, 188, 212, 0.8)), url('https://via.placeholder.com/1200x600') center/cover;
            color: white;
            padding: 5rem 0;
            border-radius: 0 0 30px 30px;
            margin-bottom: 3rem;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            padding: 2.5rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        h1, h2, h3 {
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }
        h2 {
            border-left: 5px solid var(--ocean-teal);
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            color: var(--deep-purple);
            margin-top: 2rem;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--ocean-teal);
            margin-bottom: 1rem;
        }
        .img-fluid {
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            margin: 1.5rem 0;
        }
        .img-fluid:hover {
            transform: scale(1.02);
        }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #e3f2fd 100%);
            border-left: 4px solid var(--primary-blue);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
        .nav-pills .nav-link.active {
            background: linear-gradient(45deg, var(--primary-blue), var(--ocean-teal));
            font-weight: 600;
        }
        .nav-pills .nav-link {
            color: var(--primary-blue);
            margin: 0.2rem;
            border-radius: 20px;
        }
        footer {
            background: linear-gradient(135deg, var(--primary-blue), var(--deep-purple));
            color: white;
            padding: 2rem 0;
            margin-top: 3rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 3rem 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            .content-section {
                padding: 1.5rem;
            }
        }
        .keyword {
            font-weight: 700;
            color: var(--primary-blue);
            background-color: #e3f2fd;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
        }
        .marine-quest {
            color: var(--ocean-teal);
            font-weight: 700;
        }