* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
            color: #1a365d;
            margin-bottom: 1rem;
            font-weight: 700;
            line-height: 1.3;
        }
        h1 {
            font-size: clamp(2.5rem, 5vw, 3.75rem);
            border-bottom: 5px solid #f59e0b;
            padding-bottom: 0.75rem;
            margin-top: 1rem;
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            border-left: 6px solid #10b981;
            padding-left: 1rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            color: #2563eb;
            margin-top: 2.5rem;
            position: relative;
        }
        h3::before {
            content: '🏃‍♂️';
            margin-right: 0.75rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #7c3aed;
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.125rem;
        }
        a {
            color: #2563eb;
            text-decoration: none;
            transition: color 0.3s ease, text-decoration 0.3s ease;
        }
        a:hover {
            color: #1e40af;
            text-decoration: underline;
        }
        strong, b {
            color: #dc2626;
            font-weight: 700;
        }
        em {
            font-style: italic;
            color: #059669;
        }
        blockquote {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            border-left: 6px solid #0ea5e9;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            font-size: 1.2rem;
            border-radius: 0 12px 12px 0;
            box-shadow: 0 4px 12px rgba(14, 165, 233, 0.15);
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            color: #fbbf24;
            text-decoration: none;
            letter-spacing: 2px;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
            text-decoration: none;
        }
        .my-logo span {
            color: white;
            font-size: 1.8rem;
        }
        .breadcrumb {
            background-color: #f1f5f9;
            padding: 0.8rem 0;
            font-size: 0.95rem;
            color: #64748b;
            margin-bottom: 2rem;
            border-radius: 8px;
        }
        .breadcrumb a {
            color: #475569;
        }
        .breadcrumb a:hover {
            color: #1e40af;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 6px;
            transition: background-color 0.3s ease;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #1e3a8a;
            width: 100%;
            padding: 1rem 0;
            margin-top: 1rem;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 0.75rem 1.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .interactive-modules {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
            background: white;
            padding: 2rem;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        .module {
            display: flex;
            flex-direction: column;
        }
        .module h3 {
            font-size: 1.5rem;
            color: #1e40af;
            margin-bottom: 1rem;
            border-left: none;
        }
        .module form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .module input,
        .module textarea,
        .module select {
            padding: 0.875rem 1rem;
            border: 2px solid #cbd5e1;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        .module input:focus,
        .module textarea:focus,
        .module select:focus {
            outline: none;
            border-color: #3b82f6;
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        .module button {
            background: linear-gradient(to right, #10b981, #059669);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .module button:hover {
            background: linear-gradient(to right, #059669, #047857);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(16, 185, 129, 0.3);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
            justify-content: center;
        }
        .stars label {
            font-size: 2rem;
            color: #d1d5db;
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars input {
            display: none;
        }
        .stars input:checked ~ label,
        .stars label:hover,
        .stars label:hover ~ label {
            color: #f59e0b;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0 3rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            font-size: 1.5rem;
            margin-top: 0;
            color: #1e40af;
        }
        .quick-links {
            list-style: none;
            margin-top: 1.5rem;
        }
        .quick-links li {
            margin-bottom: 1rem;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.75rem 1rem;
            background-color: #f8fafc;
            border-radius: 10px;
            border-left: 5px solid #3b82f6;
            transition: all 0.3s ease;
        }
        .quick-links a:hover {
            background-color: #e0f2fe;
            transform: translateX(5px);
            text-decoration: none;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 16px;
            margin: 2.5rem 0;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.75rem;
            font-size: 1.1rem;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        .data-table th {
            background: linear-gradient(135deg, #1e40af, #3b82f6);
            color: white;
            padding: 1.25rem;
            text-align: left;
            font-weight: 700;
        }
        .data-table td {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .data-table tr:nth-child(even) {
            background-color: #f8fafc;
        }
        .data-table tr:hover {
            background-color: #f0f9ff;
        }
        .site-footer {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: #cbd5e1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-logo {
            font-size: 2rem;
            color: #fbbf24;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #f1f5f9;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #94a3b8;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: #60a5fa;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 1rem;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            border-left: 4px solid #f59e0b;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.95rem;
        }
        .last-updated {
            font-size: 0.95rem;
            color: #6b7280;
            background-color: #fef3c7;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 2rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff7ed, #ffedd5);
            border: 2px solid #fdba74;
            padding: 2rem;
            border-radius: 16px;
            margin: 2.5rem 0;
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 0.5rem;
            vertical-align: middle;
        }
        .text-center {
            text-align: center;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            article, .sidebar, .interactive-modules {
                padding: 1.5rem;
            }
            .main-content {
                gap: 2rem;
            }
        }