* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);
            min-height: 100vh;
            padding: 0;
            margin: 0;
        }
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        header {
            background: linear-gradient(90deg, #006064 0%, #00838f 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: bold;
            color: #80deea;
            text-decoration: none;
            transition: color 0.3s ease;
            font-family: 'Arial Black', sans-serif;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .my-logo:hover {
            color: #00bcd4;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 25px;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 10px 15px;
            border-radius: 5px;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        .breadcrumb {
            background: #e0f2f1;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #006064;
            text-decoration: none;
            font-weight: bold;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: none;
            border: none;
            padding: 10px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background: white;
            margin: 4px 0;
            border-radius: 2px;
            transition: 0.3s;
        }
        main {
            background: white;
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin-bottom: 40px;
        }
        h1 {
            color: #006064;
            font-size: 3rem;
            margin-bottom: 25px;
            border-bottom: 4px solid #00bcd4;
            padding-bottom: 15px;
            text-align: center;
        }
        h2 {
            color: #00838f;
            font-size: 2.2rem;
            margin-top: 40px;
            margin-bottom: 20px;
            padding-left: 10px;
            border-left: 5px solid #80deea;
        }
        h3 {
            color: #0097a7;
            font-size: 1.8rem;
            margin-top: 30px;
            margin-bottom: 15px;
        }
        h4 {
            color: #00acc1;
            font-size: 1.5rem;
            margin-top: 25px;
            margin-bottom: 10px;
        }
        p {
            margin-bottom: 25px;
            font-size: 1.1rem;
            text-align: justify;
            padding: 0 10px;
        }
        .highlight {
            background: #e1f5fe;
            padding: 20px;
            border-radius: 10px;
            border-left: 5px solid #0288d1;
            margin: 25px 0;
            font-weight: bold;
        }
        em {
            color: #d81b60;
            font-style: italic;
        }
        strong {
            color: #006064;
            font-weight: 800;
        }
        .content-link {
            color: #00796b;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted #00796b;
            transition: color 0.3s ease;
        }
        .content-link:hover {
            color: #004d40;
            border-bottom: 2px solid #004d40;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 30px auto;
            display: block;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease;
        }
        .featured-image:hover {
            transform: scale(1.02);
        }
        .functional-section {
            background: #f1f8e9;
            padding: 30px;
            border-radius: 12px;
            margin: 40px 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .functional-section h2 {
            color: #33691e;
            border-left: 5px solid #689f38;
        }
        form {
            display: grid;
            gap: 20px;
            margin-top: 20px;
        }
        input, textarea, select {
            width: 100%;
            padding: 15px;
            border: 2px solid #b2dfdb;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00796b;
        }
        button {
            background: linear-gradient(90deg, #00796b 0%, #004d40 100%);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #004d40 0%, #00251a 100%);
            transform: translateY(-3px);
        }
        footer {
            background: #004d40;
            color: white;
            padding: 40px 0;
            text-align: center;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 10px;
            transition: background 0.3s ease;
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        friend-link a {
            color: #80deea;
            text-decoration: none;
            font-size: 1.2rem;
            font-weight: bold;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            margin-top: 20px;
            font-size: 0.9rem;
            color: #b2dfdb;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 20px;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 20px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 10px 0;
            }
            .hamburger {
                display: flex;
                position: absolute;
                top: 25px;
                right: 20px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            main {
                padding: 25px;
            }
            .functional-section {
                padding: 20px;
            }
        }
        .last-updated {
            text-align: right;
            font-style: italic;
            color: #757575;
            margin-bottom: 30px;
            font-size: 0.9rem;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }