:root {
        --bg: #0d0d0d;
        --surface: #181818;
        --surface2: #222222;
        --border: #3a3a3a;
        --border2: #555555;
        --text: #ececec;
        --text-bright: #ffffff;
        --muted: #c8c8c8;
        --dim: #909090;
        --white: #ffffff;

        --era-legacy: #cccccc;
        --era-v2: #dddddd;
        --era-v5: #eeeeee;
        --era-v8: #ffffff;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Geist Mono', 'Courier New', monospace;
        background: var(--bg);
        color: var(--text);
        min-height: 100vh;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }

    body::before {
        content: '';
        position: fixed;
        inset: 0;
        background:
            radial-gradient(ellipse 80% 40% at 50% 0%, rgba(255, 255, 255, 0.06) 0%, transparent 65%),
            radial-gradient(ellipse 40% 30% at 20% 100%, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
        pointer-events: none;
        z-index: 0;
    }

    @keyframes pageFade {
        from {
            opacity: 0;
            transform: translateY(6px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    body>* {
        animation: pageFade 0.6s ease both;
    }

    body>*:nth-child(1) {
        animation-delay: 0.00s;
    }

    body>*:nth-child(2) {
        animation-delay: 0.08s;
    }

    body>*:nth-child(3) {
        animation-delay: 0.14s;
    }

    body>*:nth-child(4) {
        animation-delay: 0.20s;
    }

    body>*:nth-child(5) {
        animation-delay: 0.26s;
    }

    body>*:nth-child(6) {
        animation-delay: 0.30s;
    }

    body>*:nth-child(7) {
        animation-delay: 0.34s;
    }

    /* ── NAV ─── */
    nav {
        position: sticky;
        top: 0;
        z-index: 100;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 1.1rem 3rem;
        background: rgba(13, 13, 13, 0.92);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
    }

    .nav-logo {
        font-family: 'Instrument Serif', serif;
        font-style: italic;
        font-size: 1.25rem;
        color: var(--white);
        text-decoration: none;
        letter-spacing: -0.01em;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        transition: opacity 0.2s;
    }

    .nav-logo:hover {
        opacity: 0.75;
    }

    .nav-dot {
        display: inline-block;
        width: 5px;
        height: 5px;
        background: var(--white);
        border-radius: 50%;
        animation: blink 3s ease-in-out infinite;
    }

    @keyframes blink {

        0%,
        100% {
            opacity: 1
        }

        50% {
            opacity: 0.15
        }
    }

    .nav-links {
        display: flex;
        gap: 2.5rem;
        list-style: none;
    }

    .nav-links a {
        font-family: 'Geist Mono', monospace;
        color: var(--muted);
        text-decoration: none;
        font-size: 0.7rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        transition: color 0.2s;
        position: relative;
    }

    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: -3px;
        left: 0;
        width: 0;
        height: 1px;
        background: var(--white);
        transition: width 0.25s ease;
    }

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

    .nav-links a:hover::after {
        width: 100%;
    }

    .nav-links a.active {
        color: var(--white);
    }

    .nav-links a.active::after {
        width: 100%;
    }

    /* ── HERO SPLIT ─── */
    .hero-section {
        position: relative;
        z-index: 1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        border-bottom: 1px solid var(--border);
    }

    .hero {
        padding: 7rem 3rem 5rem;
        border-right: 1px solid var(--border);
    }

    .hero-eyebrow {
        font-size: 0.65rem;
        letter-spacing: 0.2em;
        text-transform: uppercase;
        color: var(--dim);
        margin-bottom: 1.75rem;
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

    .hero-eyebrow::before {
        content: '';
        display: inline-block;
        width: 24px;
        height: 1px;
        background: var(--border2);
    }

    .hero h1 {
        font-family: 'Instrument Serif', serif;
        font-weight: 400;
        font-size: clamp(2.8rem, 5vw, 4.5rem);
        line-height: 1.05;
        letter-spacing: -0.02em;
        margin-bottom: 1.5rem;
        background: linear-gradient(90deg,
                #ffffff 0%, #ffffff 30%, #888888 50%, #ffffff 70%, #ffffff 100%);
        background-size: 200% auto;
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        animation: shimmer 4s linear infinite;
    }

    .hero h1 em {
        font-style: italic;
        -webkit-text-fill-color: transparent;
    }

    @keyframes shimmer {
        0% {
            background-position: 100% center;
        }

        100% {
            background-position: -100% center;
        }
    }

    .hero>p {
        color: var(--muted);
        font-size: 0.82rem;
        line-height: 1.8;
        max-width: 380px;
        letter-spacing: 0.02em;
    }

    /* ── LORE PANEL ─── */
    .lore-panel {
        padding: 7rem 3rem 5rem;
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        position: relative;
        overflow: hidden;
    }

    .lore-panel::before {
        content: 'v10';
        position: absolute;
        top: 3rem;
        right: 3rem;
        font-family: 'Instrument Serif', serif;
        font-size: 8rem;
        font-style: italic;
        color: rgba(255, 255, 255, 0.04);
        line-height: 1;
        pointer-events: none;
        user-select: none;
        animation: floatNum 8s ease-in-out infinite;
    }

    @keyframes floatNum {

        0%,
        100% {
            transform: translateY(0)
        }

        50% {
            transform: translateY(-8px)
        }
    }

    .lore-tag {
        font-size: 0.6rem;
        letter-spacing: 0.2em;
        text-transform: uppercase;
        color: var(--dim);
        margin-bottom: 1.5rem;
    }

    .lore-panel h2 {
        font-family: 'Instrument Serif', serif;
        font-weight: 400;
        font-style: italic;
        font-size: 1.5rem;
        color: var(--white);
        line-height: 1.4;
        margin-bottom: 1.25rem;
        letter-spacing: -0.01em;
    }

    .lore-panel p {
        font-size: 0.78rem;
        color: var(--muted);
        line-height: 1.9;
        max-width: 360px;
    }

    .lore-panel p+p {
        margin-top: 0.85rem;
    }

    .lore-sig {
        margin-top: 2rem;
        font-size: 0.65rem;
        letter-spacing: 0.1em;
        color: var(--dim);
        text-transform: uppercase;
        display: flex;
        align-items: center;
        gap: 0.6rem;
    }

    .lore-sig::before {
        content: '';
        display: inline-block;
        width: 16px;
        height: 1px;
        background: var(--dim);
    }

    /* ── STATS ─── */
    .stats-bar {
        position: relative;
        z-index: 1;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        max-width: 600px;
        margin: 3rem auto;
        border: 1px solid var(--border);
    }

    .stat {
        padding: 1.5rem 2rem;
        border-right: 1px solid var(--border);
        transition: background 0.25s ease;
        text-align: center;
    }

    .stat:hover {
        background: var(--surface);
    }

    .stat:last-child {
        border-right: none;
    }

    .stat-num {
        font-family: 'Instrument Serif', serif;
        font-size: 2.2rem;
        color: var(--white);
        display: block;
        letter-spacing: -0.02em;
        line-height: 1;
        margin-bottom: 0.4rem;
    }

    .stat-label {
        font-size: 0.6rem;
        letter-spacing: 0.15em;
        text-transform: uppercase;
        color: var(--muted);
    }

    /* ── TECH STACK ─── */
    .tech-bar {
        position: relative;
        z-index: 1;
        padding: 0 3rem 3rem;
    }

    .tech-label {
        font-size: 0.6rem;
        letter-spacing: 0.2em;
        text-transform: uppercase;
        color: var(--dim);
        margin-bottom: 1rem;
    }

    .tech-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;

    }

    .tech-item {
        background: rgba(255, 255, 255, 0.02);
        backdrop-filter: blur(6px);
        border-radius: 6px;
        padding: 0.35rem 0.8rem;
        font-size: 0.7rem;
        border: 1px solid var(--border);
        text-align: center;
    }

    .tech-item.active {
        color: var(--text-bright);
        border-color: var(--border2);
    }

    .tech-item.active:hover {
        border-color: #888;
    }

    .tech-item.deprecated {
        color: var(--dim);
        border-color: var(--border);
        text-decoration: line-through;
        text-decoration-color: var(--dim);
    }

    /* ── FILTER ─── */
    .filter-bar {
        position: relative;
        z-index: 1;
        display: flex;
        padding: 0 3rem 3rem;
        border-bottom: 1px solid var(--border);
        margin-bottom: 2.5rem;
        justify-content: center;
    }

    .filter-btn {
        background: transparent;
        border: 1px solid var(--border);
        border-right: none;
        color: var(--muted);
        padding: 0.5rem 1.25rem;
        font-family: 'Geist Mono', monospace;
        font-size: 0.65rem;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        cursor: pointer;
        transition: background 0.2s, color 0.2s;
        white-space: nowrap;
    }

    .filter-btn:first-child {
        border-radius: 2px 0 0 2px;
    }

    .filter-btn:last-child {
        border-right: 1px solid var(--border);
        border-radius: 0 2px 2px 0;
    }

    .filter-btn:hover {
        background: var(--surface);
        color: var(--text-bright);
    }

    .filter-btn.active {
        background: var(--white);
        color: #000;
        border-color: var(--white);
    }

    .filter-btn.active+.filter-btn {
        border-left-color: var(--border);
    }

    /* ── MAIN ─── */
    main {
        position: relative;
        z-index: 1;
        max-width: 860px;
        margin: 0 auto;
        padding: 0 3rem 6rem;
    }

    /* ── VERSION CARD ─── */
    .version-card {
        border-bottom: 1px solid var(--border);
        opacity: 0;
        transform: translateY(10px);
        animation: fadeUp 0.4s ease forwards;
        transition: background 0.2s ease;
    }

    .version-card:hover {
        background: rgba(255, 255, 255, 0.03);
    }

    @keyframes fadeUp {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .card-header {
        display: grid;
        grid-template-columns: 80px 1fr auto;
        align-items: center;
        gap: 1.5rem;
        padding: 1.25rem 0;
        cursor: pointer;
        user-select: none;
    }

    .version-num {
        font-family: 'Geist Mono', monospace;
        font-size: 0.7rem;
        letter-spacing: 0.08em;
        color: var(--dim);
        font-weight: 400;
        transition: color 0.2s;
    }

    .era-legacy .version-num {
        color: var(--era-legacy);
    }

    .era-v2 .version-num {
        color: var(--era-v2);
    }

    .era-v5 .version-num {
        color: var(--era-v5);
    }

    .era-v8 .version-num {
        color: var(--era-v8);
    }

    .card-title {
        font-family: 'Instrument Serif', serif;
        font-size: 1.05rem;
        font-weight: 400;
        color: var(--text-bright);
        letter-spacing: -0.01em;
    }

    .toggle-arrow {
        font-size: 0.65rem;
        color: var(--dim);
        transition: transform 0.3s ease, color 0.2s;
    }

    .version-card.open .toggle-arrow {
        transform: rotate(180deg);
        color: var(--muted);
    }

    /* ── CARD BODY ─── */
    .card-body {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .version-card.open .card-body {
        max-height: 4000px;
    }

    .card-body-inner {
        padding-top: 1.5rem;
        padding-bottom: 2rem;
        border-top: 1px solid var(--border);
    }

    .readme-loading {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: var(--muted);
        font-size: 0.72rem;
        padding: 0.5rem 0;
    }

    .spinner {
        width: 12px;
        height: 12px;
        border: 1px solid var(--border2);
        border-top-color: var(--muted);
        border-radius: 50%;
        animation: spin 0.7s linear infinite;
    }

    @keyframes spin {
        to {
            transform: rotate(360deg);
        }
    }

    .readme-error {
        color: var(--dim);
        font-size: 0.72rem;
    }

    /* ── README MARKDOWN ─── */
    .readme-content {
        font-size: 0.78rem;
        line-height: 1.85;
        color: var(--muted);
    }

    .readme-content h1,
    .readme-content h2 {
        font-family: 'Instrument Serif', serif;
        font-weight: 400;
        letter-spacing: -0.01em;
        color: var(--white);
        margin: 1.5rem 0 0.6rem;
        padding-bottom: 0.5rem;
        border-bottom: 1px solid var(--border);
    }

    .readme-content h1 {
        font-size: 1.3rem;
    }

    .readme-content h2 {
        font-size: 1.05rem;
    }

    .readme-content h3 {
        font-family: 'Geist Mono', monospace;
        font-size: 0.7rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--text-bright);
        margin: 1.25rem 0 0.5rem;
        font-weight: 500;
    }

    .readme-content h4 {
        font-family: 'Geist Mono', monospace;
        font-size: 0.68rem;
        color: var(--muted);
        margin: 1rem 0 0.4rem;
        font-weight: 400;
    }

    .readme-content p {
        margin-bottom: 0.75rem;
    }

    .readme-content p:last-child {
        margin-bottom: 0;
    }

    .readme-content ul,
    .readme-content ol {
        padding-left: 1.25rem;
        margin-bottom: 0.75rem;
    }

    .readme-content li {
        margin-bottom: 0.3rem;
        color: var(--text);
    }

    .readme-content li::marker {
        color: var(--border2);
    }

    .readme-content code {
        font-family: 'Geist Mono', monospace;
        background: var(--surface2);
        border: 1px solid var(--border);
        border-radius: 2px;
        padding: 0.1rem 0.35rem;
        font-size: 0.75rem;
        color: var(--text-bright);
    }

    .readme-content pre {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 4px;
        padding: 1rem 1.25rem;
        overflow-x: auto;
        margin-bottom: 0.75rem;
    }

    .readme-content pre code {
        background: none;
        border: none;
        padding: 0;
    }

    .readme-content a {
        color: var(--text-bright);
        text-decoration: underline;
        text-underline-offset: 3px;
        transition: opacity 0.2s;
    }

    .readme-content a:hover {
        opacity: 0.7;
    }

    .readme-content blockquote {
        border-left: 2px solid var(--border2);
        padding-left: 1rem;
        margin: 0.75rem 0;
        color: var(--muted);
        font-style: italic;
    }

    .readme-content table {
        width: 100%;
        border-collapse: collapse;
        margin-bottom: 0.75rem;
        font-size: 0.75rem;
    }

    .readme-content th {
        border: 1px solid var(--border);
        padding: 0.5rem 0.75rem;
        text-align: left;
        color: var(--white);
        background: var(--surface);
    }

    .readme-content td {
        border: 1px solid var(--border);
        padding: 0.4rem 0.75rem;
        color: var(--text);
    }

    .readme-content hr {
        border: none;
        border-top: 1px solid var(--border);
        margin: 1rem 0;
    }

    .readme-content img {
        max-width: 100%;
        border-radius: 4px;
    }

    .github-link {
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
        font-family: 'Geist Mono', monospace;
        font-size: 0.65rem;
        color: var(--dim);
        text-decoration: none;
        margin-top: 1.5rem;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        transition: color 0.2s;
    }

    .github-link:hover {
        color: var(--text-bright);
    }

    .github-link::before {
        content: '↗ ';
    }

    /* ── FOOTER ─── */
    footer {
        position: relative;
        z-index: 1;
        padding: 2rem 3rem;
        border-top: 1px solid var(--border);
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .footer-left {
        font-size: 0.68rem;
        color: var(--muted);
        letter-spacing: 0.05em;
    }

    .footer-left a {
        color: var(--text-bright);
        text-decoration: none;
        transition: opacity 0.2s;
    }

    .footer-left a:hover {
        opacity: 0.7;
    }

    .footer-right {
        font-size: 0.6rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--dim);
    }

    /* ── RESPONSIVE ─── */
    @media (max-width: 860px) {
        .hero-section {
            grid-template-columns: 1fr;
        }

        .hero {
            border-right: none;
            border-bottom: 1px solid var(--border);
        }

        .lore-panel::before {
            font-size: 5rem;
        }
    }

    @media (max-width: 640px) {

        nav,
        main,
        footer {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .hero,
        .lore-panel {
            padding: 4rem 1.5rem 3rem;
        }

        .stats-bar {
            margin: 3rem 1.5rem;
            grid-template-columns: 1fr;
        }

        .stat {
            border-right: none;
            border-bottom: 1px solid var(--border);
        }

        .stat:last-child {
            border-bottom: none;
        }

        .filter-bar {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
        }

        .filter-btn {
            border-right: 1px solid var(--border) !important;
            border-radius: 2px !important;
        }

        .nav-links {
            display: none;
        }

        .card-header {
            grid-template-columns: 64px 1fr auto;
        }

        .tech-bar {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
    }