*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: #1e2a3a;
            background: #f8fafc;
            padding: 0 16px;
            max-width: 1280px;
            margin: 0 auto;
        }
        a {
            color: #1a6b8a;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0e4b62;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.6rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.5rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #0b1a26;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.4rem;
            border-bottom: 4px solid #2b8cbe;
            padding-bottom: 0.4rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 5px solid #2b8cbe;
            padding-left: 0.9rem;
            margin-top: 2.8rem;
        }
        h3 {
            font-size: 1.4rem;
            color: #1a4a5e;
        }
        h4 {
            font-size: 1.15rem;
            color: #2a5a6e;
            font-weight: 600;
        }
        p {
            margin-bottom: 1.2rem;
            color: #2c3e50;
        }
        strong,
        b {
            color: #0b2a3a;
        }
        .container {
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.06);
            padding: 24px 28px;
            margin: 20px 0 40px;
        }
        @media (min-width: 768px) {
            .container {
                padding: 40px 48px;
            }
            body {
                padding: 0 24px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 56px 64px;
            }
        }
        .site-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0 12px;
            border-bottom: 2px solid #e2edf2;
            position: relative;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #0b1a26;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #1a6b8a 0%, #2b8cbe 70%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.85;
        }
        .my-logo i {
            -webkit-text-fill-color: #2b8cbe;
            font-size: 1.6rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            color: #1a4a5e;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .nav-toggle:hover {
            background: #e8f0f4;
        }
        .primary-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
        }
        .primary-nav a {
            font-weight: 500;
            color: #1e3a4a;
            padding: 6px 0;
            border-bottom: 2px solid transparent;
            transition: border-color 0.2s, color 0.2s;
            font-size: 0.95rem;
        }
        .primary-nav a:hover {
            color: #1a6b8a;
            border-bottom-color: #2b8cbe;
            text-decoration: none;
        }
        .breadcrumb {
            width: 100%;
            margin-top: 10px;
            font-size: 0.85rem;
            color: #5a7a8a;
            display: flex;
            flex-wrap: wrap;
            gap: 4px 8px;
            padding: 8px 0 4px;
            border-top: 1px solid #e8f0f4;
        }
        .breadcrumb a {
            color: #2b6a8a;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .sep {
            color: #8aaabc;
        }
        @media (max-width: 767px) {
            .nav-toggle {
                display: block;
            }
            .primary-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 2px;
                padding: 12px 0 8px;
                border-top: 1px solid #e2edf2;
                margin-top: 12px;
            }
            .primary-nav.open {
                display: flex;
            }
            .primary-nav a {
                padding: 8px 0;
                width: 100%;
                border-bottom: 1px solid #f0f5f8;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .container {
                padding: 16px 14px;
                border-radius: 14px;
            }
        }
        .feature-image-wrap {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            background: #eaf2f7;
            position: relative;
        }
        .feature-image-wrap img {
            width: 100%;
            object-fit: cover;
            max-height: 420px;
        }
        .feature-image-wrap .img-caption {
            padding: 10px 16px;
            background: rgba(11, 26, 38, 0.06);
            font-size: 0.85rem;
            color: #3a5a6a;
            font-style: italic;
        }
        .interactive-module {
            background: #f2f7fb;
            border-radius: 16px;
            padding: 24px 20px;
            margin: 2.4rem 0;
            border: 1px solid #dce8ef;
        }
        .interactive-module h3 {
            margin-top: 0;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form,
        .comment-form,
        .score-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin-top: 12px;
        }
        .search-form input,
        .comment-form input,
        .comment-form textarea,
        .score-form select {
            padding: 10px 16px;
            border: 1px solid #cbdbe6;
            border-radius: 10px;
            font-size: 1rem;
            background: #fff;
            flex: 1 1 200px;
            transition: border 0.2s, box-shadow 0.2s;
            font-family: inherit;
        }
        .search-form input:focus,
        .comment-form input:focus,
        .comment-form textarea:focus,
        .score-form select:focus {
            border-color: #2b8cbe;
            box-shadow: 0 0 0 3px rgba(43, 140, 190, 0.15);
            outline: none;
        }
        .comment-form textarea {
            min-height: 80px;
            flex-basis: 100%;
            resize: vertical;
        }
        .btn {
            background: #1a6b8a;
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.25s, transform 0.1s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: inherit;
        }
        .btn:hover {
            background: #0e4b62;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-secondary {
            background: #e2edf2;
            color: #1a3a4a;
        }
        .btn-secondary:hover {
            background: #c8dae3;
        }
        .score-display {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .score-stars {
            color: #f5b342;
            font-size: 1.4rem;
            letter-spacing: 4px;
        }
        .score-value {
            font-weight: 700;
            font-size: 1.3rem;
            color: #1a4a5e;
        }
        friend-link {
            display: block;
            background: #f0f6fa;
            border-radius: 14px;
            padding: 20px 24px;
            margin: 2rem 0 1.2rem;
            border: 1px solid #dce8ef;
            font-size: 0.95rem;
        }
        friend-link::before {
            content: "🔗 Friends & Resources";
            display: block;
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b2a3a;
            margin-bottom: 12px;
        }
        friend-link a {
            display: inline-block;
            margin: 4px 12px 4px 0;
            padding: 4px 0;
        }
        .site-footer {
            border-top: 2px solid #e2edf2;
            padding: 24px 0 32px;
            margin-top: 32px;
            text-align: center;
            font-size: 0.9rem;
            color: #4a6a7a;
        }
        .site-footer .copyright {
            font-weight: 500;
            color: #1a3a4a;
        }
        .site-footer a {
            color: #1a6b8a;
        }
        .highlight-box {
            background: #e8f2f9;
            border-left: 5px solid #2b8cbe;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 1.6rem 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 16px;
            margin: 1.6rem 0;
        }
        .stat-card {
            background: #f2f7fb;
            padding: 18px 14px;
            border-radius: 14px;
            text-align: center;
            border: 1px solid #dce8ef;
        }
        .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: #1a6b8a;
            display: block;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: #4a6a7a;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .emoji-big {
            font-size: 2rem;
            margin-right: 6px;
        }
        .two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 1.6rem 0;
        }
        @media (max-width: 680px) {
            .two-col {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .toc {
            background: #f5f9fc;
            border-radius: 14px;
            padding: 18px 22px;
            margin: 1.6rem 0;
            border: 1px solid #dce8ef;
        }
        .toc h3 {
            margin-top: 0;
        }
        .toc ul {
            list-style: none;
            padding-left: 0;
            columns: 2 240px;
            column-gap: 24px;
        }
        .toc li {
            margin-bottom: 4px;
        }
        .toc a {
            color: #1a6b8a;
        }
        @media (max-width: 480px) {
            .toc ul {
                columns: 1;
            }
        }
        .schema-hidden {
            display: none;
        }
        .anchor-offset {
            scroll-margin-top: 100px;
        }
        .btn:focus-visible,
        .nav-toggle:focus-visible {
            outline: 3px solid #2b8cbe;
            outline-offset: 2px;
        }