* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Nirmala UI', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #0f1a2b 0%, #1a2b3c 100%);
            color: #e0e7ff;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #74c0fc;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background: rgba(15, 26, 43, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #2d374d;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, #ff6b6b, #4dabf7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .nav-desktop {
            display: flex;
            gap: 25px;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
        }
        .nav-desktop a {
            color: #c1c9e6;
            font-weight: 600;
            padding: 5px 0;
            position: relative;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #4dabf7;
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #c1c9e6;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #1a2b3c;
            padding: 20px;
            border-top: 1px solid #2d374d;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #c1c9e6;
            padding: 12px 0;
            border-bottom: 1px solid #2d374d;
            font-weight: 600;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            padding: 15px 20px;
            background: #1a2b3c;
            font-size: 0.9rem;
            border-bottom: 1px solid #2d374d;
        }
        .breadcrumb a {
            color: #a5b4cb;
        }
        .breadcrumb span {
            color: #74c0fc;
            margin: 0 5px;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 12px;
            border-left: 5px solid #ff6b6b;
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: #ffffff;
            line-height: 1.2;
            text-shadow: 0 2px 5px rgba(0,0,0,0.5);
        }
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
        }
        .article-meta {
            color: #a5b4cb;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid { grid-template-columns: 1fr; }
        }
        .article-content {
            font-size: 1.1rem;
        }
        .article-content h2 {
            font-size: 1.8rem;
            color: #74c0fc;
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #2d374d;
        }
        .article-content h3 {
            font-size: 1.5rem;
            color: #ffd43b;
            margin: 30px 0 15px;
        }
        .article-content p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        .article-content strong {
            color: #ffd43b;
            font-weight: 700;
        }
        .article-content em {
            color: #a5b4cb;
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #2d374d, #1a2b3c);
            border-left: 5px solid #ff6b6b;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .hero-tier-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .tier-card {
            background: rgba(255,255,255,0.05);
            border-radius: 10px;
            padding: 20px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #2d374d;
        }
        .tier-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
            border-color: #4dabf7;
        }
        .tier-card h4 {
            color: #ff6b6b;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .rating {
            color: #ffd43b;
            margin: 10px 0;
        }
        .interactive-section {
            background: rgba(255,255,255,0.03);
            border-radius: 12px;
            padding: 30px;
            margin: 40px 0;
            border: 1px solid #2d374d;
        }
        .interactive-section h2 {
            color: #ff6b6b;
            text-align: center;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #c1c9e6;
            font-weight: 600;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            background: #1a2b3c;
            border: 1px solid #2d374d;
            border-radius: 6px;
            color: #e0e7ff;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: #4dabf7;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #4dabf7, #228be6);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .btn:hover {
            background: linear-gradient(90deg, #228be6, #1c7ed6);
            transform: scale(1.03);
            box-shadow: 0 5px 15px rgba(32, 139, 230, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 15px 0;
            direction: rtl;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #495057;
            font-size: 2rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffd43b;
        }
        .sidebar {
            background: rgba(255,255,255,0.03);
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #2d374d;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #74c0fc;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #2d374d;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 15px;
        }
        .sidebar a {
            color: #c1c9e6;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            border-bottom: 1px dashed #2d374d;
        }
        .sidebar a:hover {
            color: #74c0fc;
            border-bottom-color: #74c0fc;
        }
        .footer-links {
            background: #0f1a2b;
            padding: 40px 20px;
            border-top: 2px solid #2d374d;
            border-bottom: 1px solid #2d374d;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
        }
        .web-link {
            background: rgba(255,255,255,0.03);
            padding: 12px 15px;
            border-radius: 6px;
            transition: background 0.3s ease;
        }
        .web-link:hover {
            background: rgba(77, 171, 247, 0.1);
        }
        .site-footer {
            background: #0a121f;
            padding: 30px 20px;
            text-align: center;
            color: #a5b4cb;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .copyright {
            font-size: 0.9rem;
            line-height: 1.5;
        }
        .social-links {
            display: flex;
            gap: 20px;
        }
        .social-links a {
            color: #a5b4cb;
            font-size: 1.2rem;
            transition: color 0.3s ease;
        }
        .social-links a:hover {
            color: #4dabf7;
        }
        .text-center { text-align: center; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }