* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #e0e0e0;
            background: linear-gradient(135deg, #0c1a2d 0%, #16324e 100%);
            min-height: 100vh;
            padding: 0;
            margin: 0;
        }
        a {
            color: #4da6ff;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #80c1ff;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: rgba(10, 25, 47, 0.95);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #2a4d7a;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: #00ccff;
            text-shadow: 0 0 10px #0077ff;
            letter-spacing: 1px;
            font-family: 'Arial Black', sans-serif;
        }
        .logo a:hover {
            text-decoration: none;
            color: #80ffea;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }
        nav ul li a {
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background 0.3s;
        }
        nav ul li a:hover {
            background-color: rgba(74, 144, 226, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #00ccff;
            cursor: pointer;
            background: none;
            border: none;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: rgba(20, 40, 70, 0.7);
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #a3d5ff;
        }
        .breadcrumb a:hover {
            color: #ffffff;
        }
        main {
            display: grid;
            grid-template-columns: 3fr 1fr;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 768px) {
            main {
                grid-template-columns: 1fr;
            }
        }
        .content {
            background-color: rgba(18, 35, 60, 0.8);
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 40, 100, 0.5);
            border: 1px solid #2a5a8c;
        }
        .sidebar {
            background-color: rgba(18, 35, 60, 0.8);
            border-radius: 15px;
            padding: 1.5rem;
            box-shadow: 0 10px 20px rgba(0, 40, 100, 0.4);
            border: 1px solid #2a5a8c;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 3.2rem;
            color: #00e6ff;
            margin-bottom: 1.5rem;
            text-align: center;
            text-shadow: 0 0 15px #0066cc;
            border-bottom: 3px solid #00a3cc;
            padding-bottom: 0.8rem;
        }
        h2 {
            font-size: 2.4rem;
            color: #66ccff;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid #3399ff;
        }
        h3 {
            font-size: 1.8rem;
            color: #99ddff;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #c2e7ff;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
            line-height: 1.9;
        }
        .highlight {
            background-color: rgba(0, 150, 255, 0.15);
            border-left: 4px solid #00aaff;
            padding: 1.2rem;
            border-radius: 0 8px 8px 0;
            margin: 1.8rem 0;
        }
        .bold {
            font-weight: 800;
            color: #ffffff;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 0.3rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        .feature-image {
            width: 100%;
            margin: 2.5rem auto;
            border-radius: 12px;
            overflow: hidden;
            border: 3px solid #3a7bc8;
            box-shadow: 0 0 25px rgba(58, 123, 200, 0.6);
        }
        .feature-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .feature-image img:hover {
            transform: scale(1.03);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #a0c8ff;
            padding: 0.8rem;
            background-color: rgba(30, 60, 100, 0.5);
        }
        .form-box {
            background-color: rgba(25, 50, 90, 0.9);
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 2rem;
            border: 1px solid #3a7bc8;
        }
        .form-box h3 {
            margin-top: 0;
            color: #66ccff;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            margin-bottom: 1rem;
            border-radius: 8px;
            border: 1px solid #4a90e2;
            background-color: rgba(10, 25, 50, 0.8);
            color: #e0e0e0;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00ccff;
            box-shadow: 0 0 10px rgba(0, 204, 255, 0.5);
        }
        button {
            background: linear-gradient(to right, #0077ff, #00aaff);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
        }
        button:hover {
            background: linear-gradient(to right, #00aaff, #00ccff);
            box-shadow: 0 0 15px rgba(0, 170, 255, 0.7);
            transform: translateY(-3px);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .stars {
            color: #ffcc00;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .stars i:hover {
            color: #ffdd44;
        }
        footer {
            background-color: rgba(8, 20, 40, 0.98);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
            border-top: 3px solid #2a4d7a;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #66ccff;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
            font-size: 1.1rem;
        }
        friend-link a {
            color: #a3d5ff;
        }
        friend-link a:hover {
            color: #ffffff;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #3a5a8a;
            color: #8aacc8;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            nav ul {
                flex-direction: column;
                width: 100%;
                display: none;
                margin-top: 1rem;
                gap: 0;
            }
            nav ul.show {
                display: flex;
            }
            nav ul li {
                width: 100%;
                text-align: center;
            }
            nav ul li a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #2a4d7a;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
            .content, .sidebar {
                padding: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mt-3 {
            margin-top: 3rem;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .last-updated {
            color: #88ddaa;
            font-style: italic;
            font-size: 0.95rem;
            margin-top: 2rem;
            padding: 0.5rem;
            background-color: rgba(30, 80, 60, 0.3);
            border-radius: 5px;
            display: inline-block;
        }