:root {
            --bg-color: #ffffff;
            --surface-color: #f4f4f5;
            --text-primary: #000;
            --text-secondary: #52525b;
            --accent-color: #304ffe;
            --accent-hover: #1e3bbd;
            --border-color: #e4e4e4;
            --nav-height: 75.75px;
            --container-width: 1300px;
        }
        [data-theme="dark"] {
            --bg-color: #000;
            --surface-color: #1a1a1a;
            --text-primary: #ffffff;
            --text-secondary: #a1a1aa;
            --accent-color: #304ffe;
            --accent-hover: #536dfe;
            --border-color: #212121;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; outline: none; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Roboto', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-primary);
            line-height: 1.75;
            overflow-x: hidden;
            transition: background-color 0.4s ease, color 0.4s ease;
        }
        #messageBox { margin-top: 12px; font-size: 15px; }
        a { text-decoration: none; color: inherit; transition: color 0.2s; }
        img { max-width: 100%; height: auto; display: block; }
        .fade-in-up {
            opacity: 0;
            transform: translateY(25px);
            transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .fade-in-up.visible { opacity: 1; transform: translateY(0); }
        .power-link {
            color: var(--accent-color);
            font-weight: 500;
            cursor: pointer;
            position: relative;
            padding-bottom: 2px;
        }
        .power-link:after {
            content: '';
            position: absolute; left: 0; bottom: 0;
            width: 0%; height: 2px;
            background: var(--accent-color);
            transition: width 0.3s cubic-bezier(0.25, 1, 0.5, 1);
        }
        .power-link:hover:after { width: 100%; }
        header {
            position: sticky; top: 0; left: 0; right: 0;
            padding: 20.15px;
            background: color-mix(in srgb, var(--bg-color) 90%, transparent);
            backdrop-filter: blur(16px) saturate(1.75);
            -webkit-backdrop-filter: blur(15px) saturate(1.75);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            display: flex; align-items: center; justify-content: space-between;
        }
        .logo { font-weight: 900; font-size: 1.4rem; letter-spacing: -1px; display: flex; align-items: center; gap: 0.5rem; }
        #progressBar { height: 2px; background: var(--accent-color); width: 0; transition: width 0.1s linear; position: absolute; bottom: -1px; left: 0; }
        .icon-btn {
            background: none; border: none; padding: 10px; border-radius: 4px;
            color: var(--text-primary); display: flex; align-items: center; justify-content: center;
        }
        .icon-btn:hover { background: var(--surface-color); color: var(--accent-color); }
        .desktop-nav { display: flex; align-items: center; gap: 2rem; }
        .mobile-toggle { display: none; }       
        .cta-btn {
            background: var(--accent-color); color: #fff; padding: 0.75rem 1.55rem; border-radius: 999px;
            font-size: 0.9rem; font-weight: 500; border: none;
            transition: transform 0.2s;
            margin-top: 0%;
            border: 1px solid var(--accent-color);
        }
        .cta-btn:hover { background-color: var(--bg-color); border: 1px solid var(--text-primary); color: var(--text-primary) }
        .layout-grid {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 3rem 1.5rem 6rem;
            display: grid;
            /* Sidebar | Content Area (Minmax prevents blowout) | Right Gutter (Sticky Share) */
            grid-template-columns: 280px minmax(0, 760px) 1fr; 
            gap: 4rem;
            align-items: start;
        }
        aside.toc-sidebar {
            position: sticky;
            top: 9rem;
            overflow-y: auto;
            padding-right: 21px;
        }
        .toc-title { text-transform: uppercase; letter-spacing: 1.5px; font-size: 0.75rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 1.5rem; }
        .toc-list { border-left: 2px solid var(--border-color); }
        .toc-link { display: block; padding: 0.6rem 0 0.6rem 1.5rem; font-size: 0.9rem; color: var(--text-secondary); transition: all 0.2s; }
        .toc-link:hover { color: var(--text-primary); }
        .toc-link.active { color: var(--accent-color); border-left-color: var(--accent-color); font-weight: 500; }
        .toc-link.sub { padding-left: 2.5rem; font-size: 0.85rem; }
        .sticky-rail {
            position: sticky;
            top: 9rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            align-items: flex-start;
        }
        .share-btn-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--surface-color);
        }
        .share-btn-group .icon-btn { color: var(--text-secondary); }
        .share-btn-group .icon-btn:hover { color: var(--accent-color); background: transparent; }
        .main-content { grid-column: 2; max-width: 100%; margin-top: 0%; }
        .main-content h1 { font-size: clamp(2.5rem, 6vw, 4rem); line-height: 1.1; font-weight: 900; margin-bottom: 1.75rem; letter-spacing: -1.5px; }
        .meta-header { display: flex; flex-wrap: wrap; align-items: center; gap: 2rem; padding-bottom: 2rem; margin-bottom: 3rem; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; color: var(--text-secondary); }
        .author-chip { display: flex; align-items: center; gap: 0.75rem; font-weight: 500; color: var(--text-primary); }
        .hero-img-wrapper { aspect-ratio: 16/7; overflow: hidden; border-radius: 12px; margin-bottom: 3.5rem; background: var(--surface-color); }
        .hero-img { width: 100%; height: 100%; object-fit: cover; transition: transform 2s cubic-bezier(0.19, 1, 0.22, 1); }
        .hero-img-wrapper:hover .hero-img { transform: scale(1.03); }
        .article-body p { font-size: 1rem; margin-bottom: 1.75rem; color: var(--text-secondary); }
        [data-theme="dark"] .article-body p { color: #c0c0c0; }
        .article-body h2 { font-size: 2.2rem; margin: 3rem 0 1.5rem; line-height:normal; font-weight: 700; letter-spacing: -0.5px; }
        .article-body h3 { font-size: 1.6rem; margin: 2.5rem 0 1rem; font-weight: 500; }      
        blockquote { border-left: 4px solid var(--accent-color); padding-left: 1.5rem; margin: 3rem 0; font-style: italic; font-size: 1.35rem; color: var(--text-primary); }
        pre { padding: 1.5rem; margin: 0; overflow-x: auto; font-family: 'Roboto Mono', monospace; font-size: 0.95rem; line-height: 1.6; color: #e0e0e0; }
        .insight-cards { display: flex; gap: 2rem; margin: 4rem 0; flex-wrap: wrap; }
        .card { 
            flex: 1 1 calc(50% - 1rem);
            border: 1px solid var(--border-color);
            border-radius: 12px; padding: 2rem; min-width: 300px;
            transition: transform 0.3s;
        }
        .card-icon { color: var(--accent-color); margin-bottom: 1rem; }
        .card-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; }
        .card-text { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; }@media (min-width: 1025px) {
            .mobile-toggle {
            display: none !important;
        }
        }
        .drawer-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 1005; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
        .drawer-backdrop.active { opacity: 1; pointer-events: auto; }
        .drawer { position: fixed; top: 0; right: 0; width: 80%; max-width: 320px; height: 100%; background: var(--bg-color); z-index: 1006; transform: translateX(100%); transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); padding: 2rem; display: flex; flex-direction: column; }
        .drawer.active { transform: translateX(0); }
        @media (max-width: 1200px) {
            .layout-grid { grid-template-columns: 200px minmax(0, 1fr) 100px; gap: 2rem; }
            aside.toc-sidebar { width: 200px; padding-right: 10px; }
        }
        @media (max-width: 1024px) {
            .desktop-nav { display: none; }
            .mobile-toggle { display: block; }
            .layout-grid { grid-template-columns: minmax(0, 1fr); gap: 1rem; padding-top: 2.15rem; }
            aside.toc-sidebar { display: none; }
            .sticky-rail { display: none; }
            .main-content { grid-column: 1; }
        }
        @media (max-width: 600px) {
            .card { flex: 1 1 100%; min-width: unset; }
            .meta-header { gap: 1rem; font-size: 0.8rem; }
            .author-chip { flex-direction: column; align-items: flex-start; }
        }
        .footer-link {
            transition: color 0.2s;
            line-height: 1.5;
            font-size: 15.75px;
        }
        .footer-link:hover {
            color: var(--accent-color);
        }
        .logo-image {
            height: 36px;
            width: auto;
            max-width: 180px; 
            display: block; 
            transition: all 0.2s ease;
        }
        .social-icon {
            transition: transform 0.2s, color 0.2s;
        }
        .social-icon:hover {
            transform: translateY(-2px) scale(1.1);
            color: var(--accent-color);
        }
        .text-accent {
            color: var(--accent-color);
        }
        .service-card {
            margin-bottom: 15px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            border: 1px solid #212121;
        }
        .service-card:hover {
            border-color: var(--accent-hover);
        }
        .service-icon {
            color: var(--accent-color);
            transition: transform 0.3s ease;
            font-size: 30px !important; 
            font-variation-settings: 'FILL' 0, 'wght' 500, 'GRAD' 0, 'opsz' 28;
        }
        .newsletter-input {
            background-color: transparent !important; 
            border: 1px solid #303030 !important;
            transition: border-color 0.2s ease;
        }
        .newsletter-input:focus {
            border-color: var(--accent-color) !important;
        }
        .newsletter-button {
            transition: background-color 0.2s ease, transform 0.1s ease;
            background-color: var(--accent-color);
            box-shadow: none;
        }
        .newsletter-button:hover {
            background-color: #151515 !important;
            opacity: 1;
            transform: translateY(0);
            box-shadow: none;
        }
        .newsletter-button:active {
             transform: scale(0.99); 
        }
        .logo-image {
            height: 75px;
            width: auto;
            max-width: 175px; 
            display: block; 
            transition: all 0.2s ease;
        }
        .service-card h4 {
            font-size: 1.45em;
            letter-spacing: -0.45px;
            margin-bottom: 0.45em;
            font-weight: 700;
        }
        .service-card p {
            font-size: 1em;
            letter-spacing: -0.45px;
        }
.fab-donate {
    position: fixed;
    right: 21px;
    bottom: 21px;
    padding: 9px 13px;
    border-radius: 75px;
    background: #304ffe;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 15.75px;
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    z-index: 999;
}
.fab-donate .material-symbols-outlined {
    font-size: 21.75px;
}
.fab-donate:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.35);
}
.fab-text {
    line-height: 1;
}
.article-body a {
        color: #304ffe;
        text-decoration: none;
    }