:root {
            --primary: #1a5e96;
            --secondary: #ff9f1c;
            --accent: #06d6a0;
            --light: #f8f9fa;
            --dark: #212529;
            --shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f5f7fa;
            color: var(--dark);
            line-height: 1.8;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            padding: 15px 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .logo span {
            color: var(--secondary);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: 0.3s;
            font-size: 1.05rem;
        }
        nav a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .btn {
            padding: 10px 20px;
            border-radius: 30px;
            border: none;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        .btn-download {
            background-color: var(--secondary);
            color: white;
            margin-right: 10px;
        }
        .btn-login {
            background-color: white;
            color: var(--primary);
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .hero {
            background: url('https://via.placeholder.com/1200x400?text=Sagar+Surfer+Indian+Ocean+Adventure') center/cover no-repeat;
            padding: 80px 0;
            text-align: center;
            color: white;
            position: relative;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.6);
        }
        .hero-content {
            position: relative;
            z-index: 1;
        }
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        main {
            padding: 60px 0;
        }
        .section {
            margin-bottom: 80px;
        }
        .section-title {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 30px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--secondary);
            display: inline-block;
        }
        .content-card {
            background-color: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            padding: 30px;
            margin-bottom: 30px;
            transition: 0.3s;
        }
        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
        }
        .content-card h3 {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .content-card p {
            margin-bottom: 20px;
            font-size: 1.05rem;
        }
        .content-card ul {
            margin-left: 25px;
            margin-bottom: 20px;
        }
        .content-card li {
            margin-bottom: 10px;
        }
        .image-container {
            margin: 30px 0;
            text-align: center;
        }
        .image-container img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .highlight {
            background-color: rgba(255,159,28,0.1);
            border-left: 4px solid var(--secondary);
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 5px 5px 0;
        }
        .highlight strong {
            color: var(--primary);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        .feature-card {
            background-color: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            padding: 25px;
            text-align: center;
            transition: 0.3s;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 16px rgba(0,0,0,0.15);
            border-top: 3px solid var(--accent);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .feature-card h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 15px;
        }
        .tabs {
            display: flex;
            border-bottom: 2px solid #ddd;
            margin-bottom: 30px;
        }
        .tab {
            padding: 15px 25px;
            cursor: pointer;
            background-color: #f1f1f1;
            border: none;
            font-weight: 600;
            color: var(--dark);
            transition: 0.3s;
        }
        .tab.active {
            background-color: var(--primary);
            color: white;
            border-top-left-radius: 8px;
            border-top-right-radius: 8px;
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--secondary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--accent);
            display: inline-block;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: #ccc;
            text-decoration: none;
            transition: 0.3s;
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .tag {
            background-color: #343a40;
            padding: 8px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        .recommendation {
            background-color: rgba(26,94,150,0.1);
            padding: 20px;
            border-radius: 10px;
            margin-top: 20px;
            border-left: 4px solid var(--primary);
        }
        .recommendation h4 {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                padding: 20px;
                box-shadow: 0 5px 5px rgba(0,0,0,0.1);
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 15px;
            }
            .hamburger {
                display: block;
            }
            .btn-group {
                display: none;
            }
            .mobile-btn-group {
                display: flex;
                justify-content: center;
                gap: 10px;
                margin-top: 20px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            .logo {
                font-size: 1.5rem;
            }
            .hero {
                padding: 60px 0;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .content-card {
                padding: 20px;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }