* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
            background: #f4f7fc;
            color: #1e293b;
            line-height: 1.7;
            padding: 0 1rem;
        }
        a {
            color: #0f3b5e;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #d97706;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        li {
            margin-bottom: 0.3rem;
        }
        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            color: #0b1e2e;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.2rem;
            border-left: 6px solid #d97706;
            padding-left: 1rem;
        }
        h2 {
            font-size: 1.7rem;
            border-bottom: 2px solid #d1d9e6;
            padding-bottom: 0.4rem;
        }
        h3 {
            font-size: 1.3rem;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: #ffffff;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            border-radius: 20px;
            padding: 1.5rem 2rem 2rem;
        }
        header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0 1rem;
            border-bottom: 1px solid #e2e8f0;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #0f3b5e, #d97706);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
        }
        .my-logo i {
            -webkit-text-fill-color: #d97706;
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: #0f3b5e;
            cursor: pointer;
            padding: 0.3rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e2e8f0;
        }
        nav#main-nav {
            display: flex;
            gap: 1.2rem;
            flex-wrap: wrap;
            align-items: center;
        }
        nav#main-nav a {
            font-weight: 500;
            padding: 0.3rem 0.6rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        nav#main-nav a:hover {
            background: #eef2f7;
            color: #d97706;
        }
        .breadcrumb {
            width: 100%;
            margin-top: 0.8rem;
            font-size: 0.9rem;
            color: #64748b;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem;
        }
        .breadcrumb a {
            color: #0f3b5e;
        }
        .breadcrumb span {
            color: #94a3b8;
        }
        .search-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1.5rem 0 1rem;
            padding: 0.8rem 1rem;
            background: #f1f5f9;
            border-radius: 40px;
            align-items: center;
        }
        .search-wrap i {
            color: #64748b;
            font-size: 1.1rem;
        }
        .search-wrap input {
            flex: 1;
            min-width: 140px;
            border: none;
            background: transparent;
            padding: 0.5rem 0.3rem;
            font-size: 1rem;
            outline: none;
        }
        .search-wrap button {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 0.5rem 1.8rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-wrap button:hover {
            background: #d97706;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 2.5rem;
            margin: 1.8rem 0;
        }
        .main-article {
            min-width: 0;
        }
        .sidebar {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem 1.2rem;
            border: 1px solid #e2e8f0;
            align-self: start;
        }
        .sidebar h3 {
            margin-top: 0;
            font-size: 1.2rem;
            border-bottom: 2px solid #d1d9e6;
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
            padding: 0;
        }
        .sidebar li {
            padding: 0.4rem 0;
            border-bottom: 1px solid #eef2f7;
        }
        .sidebar li a {
            font-weight: 500;
        }
        .feature-img {
            margin: 1.8rem 0;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        .feature-img figcaption {
            padding: 0.6rem 1rem;
            background: #f1f5f9;
            font-size: 0.9rem;
            color: #475569;
        }
        .rating-area,
        .comment-area {
            background: #f8fafc;
            border-radius: 16px;
            padding: 1.5rem 1.8rem;
            margin: 2rem 0 1.5rem;
            border: 1px solid #e2e8f0;
        }
        .rating-area h3,
        .comment-area h3 {
            margin-top: 0;
        }
        .star-group {
            display: flex;
            gap: 0.4rem;
            font-size: 1.8rem;
            color: #cbd5e1;
            cursor: pointer;
            margin: 0.6rem 0 1rem;
        }
        .star-group i.active {
            color: #d97706;
        }
        .rating-area button,
        .comment-area button {
            background: #0f3b5e;
            color: #fff;
            border: none;
            padding: 0.6rem 2rem;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }
        .rating-area button:hover,
        .comment-area button:hover {
            background: #d97706;
        }
        .comment-area textarea {
            width: 100%;
            border: 1px solid #d1d9e6;
            border-radius: 12px;
            padding: 0.8rem;
            font-size: 1rem;
            resize: vertical;
            min-height: 80px;
            font-family: inherit;
        }
        .comment-list {
            margin-top: 1rem;
            border-top: 1px solid #e2e8f0;
            padding-top: 1rem;
        }
        .comment-item {
            padding: 0.6rem 0;
            border-bottom: 1px dashed #e2e8f0;
        }
        .comment-item strong {
            color: #0f3b5e;
        }
        friend-link {
            display: block;
            padding: 1.5rem 0 1rem;
            border-top: 2px solid #e2e8f0;
            margin-top: 2rem;
            font-style: normal;
        }
        friend-link::before {
            content: "🔗 Friendly Links : ";
            font-weight: 700;
            font-size: 1.1rem;
            color: #0f3b5e;
        }
        friend-link a {
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
            padding: 0.2rem 0.8rem;
            background: #eef2f7;
            border-radius: 20px;
            font-size: 0.95rem;
            transition: background 0.2s;
        }
        friend-link a:hover {
            background: #d1d9e6;
        }
        footer {
            padding: 1.5rem 0 0.5rem;
            text-align: center;
            color: #64748b;
            font-size: 0.9rem;
            border-top: 1px solid #e2e8f0;
            margin-top: 1.5rem;
        }
        footer .copyright {
            margin-top: 0.5rem;
        }
        @media (max-width: 820px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .container {
                padding: 1rem 1.2rem;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .nav-toggle {
                display: block;
            }
            nav#main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0.4rem;
                padding: 0.8rem 0 0.2rem;
            }
            nav#main-nav.open {
                display: flex;
            }
            header {
                align-items: center;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.4rem;
            }
            .container {
                padding: 0.8rem;
                border-radius: 12px;
            }
            .search-wrap {
                border-radius: 28px;
                padding: 0.5rem 0.8rem;
            }
            .search-wrap button {
                padding: 0.4rem 1.2rem;
                font-size: 0.9rem;
            }
            .star-group {
                font-size: 1.5rem;
            }
        }
        .highlight {
            background: #fef9c3;
            padding: 0.1rem 0.3rem;
            border-radius: 4px;
        }
        .badge {
            display: inline-block;
            background: #d97706;
            color: #fff;
            font-size: 0.75rem;
            padding: 0.15rem 0.7rem;
            border-radius: 20px;
            font-weight: 600;
        }
        .last-updated {
            display: block;
            text-align: right;
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 0.5rem;
        }
        .emoji-big {
            font-size: 1.3rem;
        }
        .glossary-term {
            font-weight: 600;
            color: #0f3b5e;
        }
        .tip-card {
            background: linear-gradient(135deg, #eef2ff, #fef9c3);
            border-radius: 14px;
            padding: 1rem 1.5rem;
            margin: 1.2rem 0;
            border-left: 5px solid #d97706;
        }
        .tip-card i {
            color: #d97706;
            margin-right: 0.5rem;
        }