:root {
            --primary-blue: #1a73e8;
            --secondary-teal: #00bcd4;
            --accent-orange: #ff6d00;
            --deep-ocean: #006064;
            --coral-reef: #ff5252;
            --seafoam: #80deea;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);
        }
        .marine-navbar {
            background: linear-gradient(90deg, var(--deep-ocean) 0%, var(--primary-blue) 100%);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            padding: 1rem 0;
        }
        .logo-text {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: 1px;
        }
        .nav-link {
            color: white !important;
            font-weight: 600;
            padding: 0.5rem 1.5rem !important;
            transition: all 0.3s ease;
            border-radius: 25px;
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0,96,100,0.8), rgba(26,115,232,0.8)), url('https://via.placeholder.com/1600x900') center/cover;
            color: white;
            padding: 6rem 0;
            text-align: center;
            margin-bottom: 3rem;
        }
        .content-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            padding: 3rem;
            margin-bottom: 2rem;
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        h1, h2, h3 {
            color: var(--deep-ocean);
            margin-bottom: 1.5rem;
        }
        h1 {
            font-size: 3rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
            border-bottom: 3px solid var(--secondary-teal);
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid var(--accent-orange);
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin-top: 2rem;
        }
        .keyword-highlight {
            background-color: var(--seafoam);
            padding: 0.2rem 0.5rem;
            border-radius: 5px;
            font-weight: 700;
        }
        .marine-image {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            margin: 2rem 0;
            transition: transform 0.3s ease;
            width: 100%;
        }
        .marine-image:hover {
            transform: scale(1.02);
        }
        .feature-box {
            background: linear-gradient(135deg, #e1f5fe 0%, #b3e5fc 100%);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 4px solid var(--secondary-teal);
        }
        .icon-box {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1rem;
        }
        .footer {
            background: linear-gradient(90deg, var(--deep-ocean) 0%, var(--primary-blue) 100%);
            color: white;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--accent-orange);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            background: var(--coral-reef);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 4rem 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .content-section {
                padding: 2rem;
            }
        }