* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
            color: #e0e0e0;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #29b6f6;
            transform: translateY(-2px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .py-1 { padding-top: 1rem; padding-bottom: 1rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }
        .py-3 { padding-top: 3rem; padding-bottom: 3rem; }
        .bold { font-weight: 700; }
        .highlight {
            background: linear-gradient(90deg, #ff9800, #ffeb3b);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: bold;
        }
        .site-header {
            background: rgba(15, 32, 39, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid #00bcd4;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(45deg, #00bcd4, #4caf50);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 5px rgba(0,0,0,0.3);
        }
        .my-logo:hover {
            transform: scale(1.05);
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 20px;
        }
        .nav-desktop a:hover {
            background: rgba(0, 188, 212, 0.2);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #00bcd4;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: rgba(15, 32, 39, 0.98);
            padding: 20px;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: 0 10px 20px rgba(0,0,0,0.5);
            border-top: 1px solid #00bcd4;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 15px;
            border-bottom: 1px solid rgba(0, 188, 212, 0.3);
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background: rgba(32, 58, 67, 0.8);
            padding: 12px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .breadcrumb a {
            color: #80deea;
        }
        .breadcrumb i {
            margin: 0 8px;
            color: #4fc3f7;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 30px 20px;
            background: linear-gradient(90deg, rgba(0,188,212,0.1), rgba(76,175,80,0.1));
            border-radius: 20px;
            border-left: 6px solid #00bcd4;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            color: #ffffff;
            text-shadow: 0 3px 10px rgba(0,0,0,0.5);
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
        }
        .article-meta {
            color: #b0bec5;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .article-meta i {
            color: #4fc3f7;
            margin-right: 5px;
        }
        .content-section {
            background: rgba(25, 40, 50, 0.7);
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 40px;
            border: 1px solid rgba(0, 188, 212, 0.3);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 188, 212, 0.15);
        }
        h2 {
            font-size: 2.5rem;
            color: #4fc3f7;
            border-bottom: 3px solid #ff9800;
            padding-bottom: 10px;
            margin-bottom: 25px;
            display: inline-block;
        }
        h3 {
            font-size: 1.8rem;
            color: #81c784;
            margin: 25px 0 15px;
        }
        h4 {
            font-size: 1.4rem;
            color: #ffb74d;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
            font-size: 1.1rem;
        }
        .featured-img {
            float: right;
            margin: 0 0 20px 30px;
            max-width: 500px;
        }
        @media (max-width: 992px) {
            .featured-img {
                float: none;
                margin: 20px auto;
                max-width: 100%;
            }
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #b0bec5;
            margin-top: 10px;
            font-size: 0.9rem;
        }
        blockquote {
            border-left: 5px solid #ff9800;
            padding-left: 25px;
            margin: 30px 0;
            font-style: italic;
            background: rgba(255, 152, 0, 0.05);
            padding: 20px;
            border-radius: 0 10px 10px 0;
        }
        .interactive-module {
            background: rgba(15, 32, 39, 0.9);
            border-radius: 15px;
            padding: 25px;
            margin: 40px 0;
            border: 2px solid #00bcd4;
        }
        .module-title {
            color: #00bcd4;
            font-size: 1.8rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .module-title i {
            font-size: 2rem;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            color: #b0bec5;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #2c5364;
            background: rgba(44, 83, 100, 0.5);
            color: #ffffff;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #00bcd4;
            box-shadow: 0 0 0 2px rgba(0, 188, 212, 0.3);
        }
        button {
            background: linear-gradient(45deg, #00bcd4, #0097a7);
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        button:hover {
            background: linear-gradient(45deg, #0097a7, #006978);
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0, 188, 212, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 15px 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ff9800;
        }
        .star-rating input:checked ~ label {
            color: #ff9800;
        }
        footer {
            background: #0a1419;
            padding: 40px 0 20px;
            margin-top: 60px;
            border-top: 3px solid #00bcd4;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            color: #00bcd4;
            font-size: 1.5rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(0, 188, 212, 0.5);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #b0bec5;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: #00bcd4;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            padding: 15px;
            background: rgba(0, 188, 212, 0.1);
            border-radius: 10px;
            margin-bottom: 10px;
            border: 1px solid rgba(0, 188, 212, 0.3);
        }
        friend-link a {
            color: #80deea;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #78909c;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: #00bcd4;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.3);
            z-index: 99;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #0097a7;
            transform: translateY(-5px);
        }