* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --background: #f8fbfd;
            --foreground: #1a1f36;
            --card: #ffffff;
            --card-foreground: #1a1f36;
            --primary: #3b5bdb;
            --primary-foreground: #f8fbfd;
            --secondary: #f0f4f8;
            --muted-foreground: #64748b;
            --border: #e2e8f0;
            --primary-light: #e8ecf9;
            --radius: 12px;
        }

        html.dark {
            --background: #0f1419;
            --foreground: #f0f4f8;
            --card: #1a202c;
            --card-foreground: #f0f4f8;
            --primary: #4f7dff;
            --primary-foreground: #0f1419;
            --secondary: #2d3748;
            --muted-foreground: #cbd5e0;
            --border: #2d3748;
            --primary-light: #1a2847;
        }

        body {
            font-family: 'DM Sans', sans-serif;
            background-color: var(--background);
            color: var(--foreground);
            line-height: 1.6;
            overflow-x: hidden;
            transition: background-color 0.3s, color 0.3s;
            width: 100%;
            max-width: 100vw;
        }

        html {
            overflow-x: hidden;
            width: 100%;
        }

        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
            box-sizing: border-box;
        }

        /* Navbar */
        nav {
            position: sticky;
            top: 0;
            z-index: 50;
            width: 100%;
            border-bottom: 1px solid var(--border);
            background-color: rgba(248, 251, 253, 0.8);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }

        html.dark nav {
            background-color: rgba(15, 20, 25, 0.8);
        }

        .nav-content {
            max-width: none;
            width: 100%;
            margin: 0;
            padding: 0 24px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-sizing: border-box;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: 'Poppins', sans-serif;
            font-size: 24px;
            font-weight: 700;
            color: #3b82f6;
            text-decoration: none;
            transition: opacity 0.3s;
            line-height: 1;
            white-space: nowrap;
        }

        .nav-logo span {
            display: block;
            line-height: 1;
        }

        .nav-logo:hover {
            opacity: 0.8;
        }

        html.dark .nav-logo,
        html.dark .logo-brand {
            color: #7dd3fc;
            text-shadow: 0 0 12px rgba(125, 211, 252, 0.45);
        }

        .logo-img {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
            display: block;
        }
        
        @media (max-width: 767px) {
            .logo-img {
                width: 32px;
                height: 32px;
            }
        }
        
        @media (max-width: 480px) {
            .logo-img {
                width: 28px;
                height: 28px;
            }
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-left: auto;
        }

        .nav-links {
            display: flex;
            gap: 16px;
            font-size: 13px;
            font-weight: 500;
        }

        @media (min-width: 768px) {
            .nav-links {
                gap: 24px;
                font-size: 14px;
            }
        }

        .nav-links a {
            color: var(--muted-foreground);
            text-decoration: none;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .theme-toggle {
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--foreground);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            border-radius: 50%;
        }

        .theme-toggle:hover {
            background-color: var(--secondary);
        }

        .theme-toggle svg {
            width: 20px;
            height: 20px;
        }

        /* Hero Section */
        .hero {
            position: relative;
            height: 40vh;
            min-height: 350px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding: 2rem 1rem;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: transparent;
        }

        html.dark .hero-bg {
            background: transparent;
        }

        .hero-gradient {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, transparent, var(--background));
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 10;
            text-align: center;
            animation: slideInDown 0.8s ease-out;
        }

        .hero-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px;
            margin-bottom: 24px;
            background-color: var(--primary-light);
            border-radius: 50%;
            border: 1px solid rgba(59, 91, 219, 0.2);
            backdrop-filter: blur(4px);
        }

        .hero-icon svg {
            width: 24px;
            height: 24px;
            color: var(--primary);
        }

        .hero h1 {
            font-family: 'Playfair Display', serif;
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
            color: var(--foreground);
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
        }

        /* Tablet (768px-1024px) */
        @media (min-width: 768px) and (max-width: 1024px) {
            nav { padding: 12px 24px; }
            .nav-content { gap: 16px; }
            .hero { padding: 40px 24px; min-height: 320px; }
            .hero h1 { font-size: 2.2rem; }
            main { padding: 0 24px; margin-top: -40px; }
            .content-wrapper { grid-template-columns: 1fr; }
        }

        .hero p {
            font-size: 16px;
            color: var(--muted-foreground);
            max-width: 600px;
            margin: 0 auto 12px;
            font-weight: 400;
            line-height: 1.5;
        }

        .hero-date {
            font-size: 12px;
            font-weight: 500;
            color: rgba(59, 91, 219, 0.8);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Main Content */
        main {
            max-width: 1200px;
            width: 100%;
            margin: -50px auto 0;
            position: relative;
            z-index: 20;
            padding: 0 24px;
            box-sizing: border-box;
        }

        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr;
            gap: 48px;
            width: 100%;
            max-width: 100%;
        }

        @media (min-width: 1024px) {
            .content-wrapper {
                grid-template-columns: 250px 1fr;
            }
        }

        /* Sidebar */
        aside {
            display: none;
        }

        @media (min-width: 1024px) {
            aside {
                display: block;
            }

            .toc {
                position: sticky;
                top: 100px;
                border-left: 2px solid var(--border);
                padding-left: 24px;
                space-y: 8px;
            }

            .toc h3 {
                font-family: 'Playfair Display', serif;
                font-size: 18px;
                font-weight: bold;
                margin-bottom: 24px;
                color: var(--foreground);
            }

            .toc a {
                display: block;
                font-size: 14px;
                color: var(--muted-foreground);
                text-decoration: none;
                padding: 8px 0;
                transition: color 0.3s;
                border-left: 2px solid transparent;
                padding-left: 8px;
                margin-left: -8px;
            }

            .toc a:hover {
                color: var(--primary);
            }
        }

        /* Content Card */
        .content-card {
            background-color: var(--card);
            border-radius: 16px;
            padding: 32px;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.08);
            width: 100%;
            max-width: 100%;
            box-sizing: border-box;
            overflow-wrap: break-word;
            word-wrap: break-word;
        }

        @media (max-width: 768px) {
            .content-card {
                padding: 24px;
            }
        }

        /* Mobile (up to 767px) */
        @media (max-width: 767px) {
            nav { padding: 0; }
            .nav-content { padding: 0 10px; }
            .nav-right { gap: 10px; }
            .nav-links { gap: 12px; font-size: 12px; }
            .nav-links a { padding: 4px 0; }
            .theme-toggle { padding: 8px; }

            .hero { padding: 30px 16px; text-align: center; min-height: 300px; }
            .hero h1 { font-size: 26px; margin-bottom: 12px; }
            .hero p { font-size: 14px; margin-bottom: 10px; }

            main { margin-top: -40px; padding: 0 16px; }
            .content-wrapper { gap: 24px; }
            section { margin-bottom: 32px; }
            .section-header { gap: 12px; }
            .section-icon { width: 36px; height: 36px; }
            .section h2 { font-size: 20px; }
            .section p { font-size: 14px; }
            .intro-text { font-size: 16px; }
        }

        /* Very small mobile (320px-480px) */
        @media (max-width: 480px) {
            .nav-content { padding: 0 8px; }
            .nav-logo { font-size: 18px; }
            .nav-links { gap: 10px; font-size: 11px; }
            .hero { padding: 25px 12px; min-height: 280px; }
            .hero h1 { font-size: 22px; margin-bottom: 10px; }
            .hero p { font-size: 13px; margin-bottom: 8px; }
            main { padding: 0 12px; }
            section h2 { font-size: 18px; }
            .content-card { padding: 16px; }
            .section-icon { width: 32px; height: 32px; }
        }

        /* Landscape mobile */
        @media (max-height: 600px) and (orientation: landscape) {
            .hero { padding: 20px 16px; min-height: 250px; height: auto; }
            .hero h1 { font-size: 24px; margin-bottom: 8px; }
            .hero p { font-size: 13px; margin-bottom: 6px; }
        }

        .intro-text {
            font-size: 18px;
            color: var(--muted-foreground);
            line-height: 1.8;
            margin-bottom: 48px;
        }

        .intro-text strong {
            color: var(--foreground);
            font-weight: 600;
        }

        /* Sections */
        section {
            margin-bottom: 48px;
            animation: fadeInUp 0.6s ease-out backwards;
            scroll-margin-top: 100px;
        }

        section:nth-child(2) { animation-delay: 0.1s; }
        section:nth-child(3) { animation-delay: 0.2s; }
        section:nth-child(4) { animation-delay: 0.3s; }
        section:nth-child(5) { animation-delay: 0.4s; }
        section:nth-child(6) { animation-delay: 0.5s; }
        section:nth-child(7) { animation-delay: 0.6s; }
        section:nth-child(8) { animation-delay: 0.7s; }

        .section-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }

        .section-icon {
            padding: 8px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s;
        }

        .section-icon svg {
            width: 24px;
            height: 24px;
        }

        section:hover .section-icon {
            transform: scale(1.1);
        }

        /* Icon colors */
        .icon-blue { background-color: #eff6ff; color: #0284c7; }
        html.dark .icon-blue { background-color: rgba(2, 132, 199, 0.2); }

        .icon-indigo { background-color: #f0f4ff; color: #4f46e5; }
        html.dark .icon-indigo { background-color: rgba(79, 70, 229, 0.2); }

        .icon-amber { background-color: #fffbeb; color: #d97706; }
        html.dark .icon-amber { background-color: rgba(217, 119, 6, 0.2); }

        .icon-emerald { background-color: #f0fdf4; color: #059669; }
        html.dark .icon-emerald { background-color: rgba(5, 150, 105, 0.2); }

        section h2 {
            font-family: 'Playfair Display', serif;
            font-size: 28px;
            font-weight: bold;
            color: var(--foreground);
        }

        section p {
            color: var(--muted-foreground);
            margin-bottom: 16px;
            line-height: 1.8;
        }

        section strong {
            color: var(--foreground);
            font-weight: 600;
        }

        /* Lists */
        section ul {
            list-style: none;
            margin-top: 24px;
        }

        .feature-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
            margin-top: 24px;
        }

        @media (min-width: 768px) {
            .feature-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--foreground);
            background-color: var(--secondary);
            padding: 16px;
            border-radius: 12px;
            border: 1px solid transparent;
            transition: border-color 0.3s;
        }

        .feature-item:hover {
            border-color: rgba(59, 91, 219, 0.2);
        }

        .feature-item::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--primary);
            flex-shrink: 0;
        }

        .log-box {
            background-color: var(--secondary);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border);
            margin-top: 16px;
        }

        .log-box h4 {
            font-size: 12px;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--muted-foreground);
            margin-bottom: 16px;
        }

        .log-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            font-size: 14px;
        }

        .log-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .log-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: rgba(59, 91, 219, 0.6);
            flex-shrink: 0;
        }

        .alert-box {
            padding: 16px;
            background-color: #fffbeb;
            border-left: 4px solid #f59e0b;
            border-radius: 0 8px 8px 0;
            margin-top: 16px;
            font-size: 14px;
            color: #92400e;
        }

        html.dark .alert-box {
            background-color: rgba(245, 158, 11, 0.1);
            color: #fcd34d;
        }

        /* Grid sections */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            margin-bottom: 48px;
            width: 100%;
            max-width: 100%;
        }

        @media (min-width: 768px) {
            .grid-2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        .grid-item h3 {
            font-family: 'Playfair Display', serif;
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--foreground);
        }

        .grid-item h3 svg {
            width: 20px;
            height: 20px;
            color: var(--primary);
        }

        .grid-item p {
            font-size: 14px;
            color: var(--muted-foreground);
            line-height: 1.6;
        }

        .divider {
            border-top: 1px solid var(--border);
            padding-top: 32px;
            margin-top: 32px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(59, 91, 219, 0.05) 0%, rgba(79, 70, 229, 0.05) 100%);
            border-radius: 16px;
            padding: 32px;
            text-align: center;
            border: 1px solid rgba(59, 91, 219, 0.15);
        }
        
        html.dark .cta-section {
            background: linear-gradient(135deg, rgba(59, 91, 219, 0.1) 0%, rgba(79, 70, 229, 0.1) 100%);
            border-color: rgba(59, 91, 219, 0.2);
        }

        .cta-section h2 {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .cta-section p {
            max-width: 500px;
            margin: 0 auto 24px;
        }

        .cta-button {
            display: inline-flex;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background-color: var(--primary);
            color: var(--primary-foreground) !important;
            padding: 0 32px;
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 2px 8px rgba(59, 91, 219, 0.2);
        }

        .cta-button:hover {
            background-color: rgba(59, 91, 219, 0.9);
            box-shadow: 0 4px 12px rgba(59, 91, 219, 0.3);
        }

        /* Footer */
        footer {
            width: 100%;
            max-width: 100vw;
            box-sizing: border-box;
            overflow-x: hidden;
            background-color: var(--secondary);
            border-top: 1px solid var(--border);
            margin-top: 80px;
            padding-top: 64px;
            padding-bottom: 32px;
            transition: background-color 0.3s;
        }

        .footer-grid {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 48px;
            margin-bottom: 48px;
            box-sizing: border-box;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .footer-section h4 {
            font-family: 'Playfair Display', serif;
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 24px;
            color: var(--foreground);
        }

        .footer-section p {
            font-size: 14px;
            color: var(--muted-foreground);
            line-height: 1.6;
            max-width: 200px;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section li {
            margin-bottom: 12px;
        }

        .footer-section a {
            font-size: 14px;
            color: var(--muted-foreground);
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: var(--primary);
        }

        .social-links {
            display: flex;
            gap: 16px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--card);
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

        .social-links a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .social-links svg {
            width: 20px;
            height: 20px;
        }

        .footer-bottom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px 0;
            border-top: 1px solid var(--border);
            padding-top: 32px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            justify-content: center;
            align-items: center;
            text-align: center;
        }

        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
            }
        }

        .footer-bottom p,
        .footer-bottom a {
            font-size: 14px;
            color: #94a3b8; /* match index footer color */
            text-align: center;
        }
        .footer-bottom i { color: var(--primary); }

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .logo-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: 'Playfair Display', serif;
            font-size: 18px;
            font-weight: bold;
            color: var(--foreground);
            margin-bottom: 16px;
        }

        .logo-brand svg {
            width: 20px;
            height: 20px;
            color: var(--primary);
        }

        /* Animations */
        @keyframes slideInDown {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        html::selection {
            background-color: rgba(59, 91, 219, 0.2);
            color: var(--primary);
        }