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

        :root {
            --bg:          #040507;
            --bg-2:        #070a0f;
            --bg-3:        #0d1017;
            --bg-4:        #111520;
            --border:      #161c28;
            --border-2:    #1e2535;
            --lime:        #9eff00;
            --lime-glow:   rgba(158, 255, 0, 0.12);
            --blue:        #00aeff;
            --blue-glow:   rgba(0, 174, 255, 0.10);
            --text:        #dde1ea;
            --text-dim:    #7a8494;
            --text-muted:  #3e4556;
            --mono:        'JetBrains Mono', 'Courier New', monospace;
            --sans:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            --max-prose:   700px;
        }

        html { scroll-behavior: smooth; }

        body {
            background: var(--bg);
            color: var(--text);
            font-family: var(--sans);
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }

        /* ── Scroll reveal ─────────────────────────────────────────────────── */
        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: none;
        }

        /* ── HERO ──────────────────────────────────────────────────────────── */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 0 72px 88px;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        #heroCanvas {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            opacity: 0.3;
        }

        /* subtle radial gradient top-right */
        .hero::before {
            content: '';
            position: absolute;
            top: -100px; right: -100px;
            width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(158,255,0,0.03) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-eyebrow {
            font-family: var(--mono);
            font-size: 10px;
            letter-spacing: 0.28em;
            text-transform: uppercase;
            color: var(--lime);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .hero-title {
            font-size: clamp(56px, 9vw, 104px);
            font-weight: 300;
            line-height: 0.95;
            letter-spacing: -0.02em;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .hero-title .acc    { color: var(--lime); font-weight: 600; }
        .hero-title .acc-ai { color: var(--lime); font-weight: 600; letter-spacing: 0.06em; margin-right: 2px; }

        .hero-rule {
            width: 52px;
            height: 1px;
            background: var(--lime);
            margin: 32px 0;
            position: relative;
            z-index: 1;
        }

        .hero-sub {
            font-size: 17px;
            font-weight: 300;
            color: var(--text-dim);
            max-width: 520px;
            line-height: 1.65;
            position: relative;
            z-index: 1;
        }

        .hero-stats {
            display: flex;
            gap: 52px;
            margin-top: 52px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }
        .hero-stat-val {
            display: block;
            font-family: var(--mono);
            font-size: 30px;
            color: var(--lime);
            font-weight: 500;
            line-height: 1;
        }
        .hero-stat-lbl {
            display: block;
            font-size: 11px;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.12em;
            margin-top: 7px;
        }

        .hero-scroll {
            position: absolute;
            bottom: 32px; right: 72px;
            font-family: var(--mono);
            font-size: 10px;
            color: var(--text-muted);
            letter-spacing: 0.18em;
            z-index: 1;
        }

        /* ── LAYOUT ─────────────────────────────────────────────────────────── */
        .section {
            padding: 96px 72px;
            border-bottom: 1px solid var(--border);
            max-width: 1280px;
            margin: 0 auto;
        }
        .section-wide {
            padding: 96px 72px;
            border-bottom: 1px solid var(--border);
        }
        .section-wide-inner {
            max-width: 1280px;
            margin: 0 auto;
        }

        /* ── SECTION HEADERS ─────────────────────────────────────────────────── */
        .s-tag {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.28em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .s-tag::after {
            content: '';
            height: 1px;
            width: 44px;
            background: var(--border-2);
        }

        .s-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 400;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 18px;
        }
        .s-title .hl { color: var(--lime); }

        .s-lead {
            font-size: 15px;
            font-weight: 300;
            color: var(--text-dim);
            max-width: var(--max-prose);
            line-height: 1.85;
            margin-bottom: 52px;
        }

        /* ── PROSE ───────────────────────────────────────────────────────────── */
        .prose {
            max-width: var(--max-prose);
            font-size: 15px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.9;
        }
        .prose p { margin-bottom: 22px; }
        .prose p:last-child { margin-bottom: 0; }
        .prose strong { color: var(--text); font-weight: 500; }

        /* ── PROOF BAR ───────────────────────────────────────────────────────── */
        .proof-bar {
            display: flex;
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
            margin-top: 48px;
        }
        .proof-item {
            flex: 1;
            padding: 24px 28px;
            border-right: 1px solid var(--border);
        }
        .proof-item:last-child { border-right: none; }
        .proof-val {
            font-family: var(--mono);
            font-size: 20px;
            color: var(--lime);
            font-weight: 500;
        }
        .proof-lbl {
            font-size: 13px;
            color: var(--blue);
            margin-top: 5px;
        }

        /* ── AI CARDS ────────────────────────────────────────────────────────── */
        .three-col {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 44px;
        }

        .ai-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 28px;
            position: relative;
            overflow: hidden;
        }
        .ai-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 2px;
        }
        .ai-card.chatgpt::before { background: #10a37f; }
        .ai-card.gemini::before  { background: #8b5cf6; }
        .ai-card.claude::before  { background: var(--lime); }

        .ai-card-phase {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .chatgpt .ai-card-phase { color: #10a37f; }
        .gemini  .ai-card-phase { color: #8b5cf6; }
        .claude  .ai-card-phase { color: var(--lime); }

        .ai-card-name {
            font-size: 20px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 14px;
        }

        .ai-card-role {
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.7;
        }

        .ai-card-divider {
            border: none;
            border-top: 1px solid var(--border);
            margin: 20px 0;
        }

        .ai-output {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            padding: 5px 0;
            display: flex;
            gap: 8px;
        }
        .ai-output::before { content: '→'; flex-shrink: 0; }

        /* ── VERSION TIMELINE ────────────────────────────────────────────────── */
        .timeline {
            position: relative;
            margin-top: 52px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 108px;
            top: 0; bottom: 0;
            width: 1px;
            background: var(--border);
        }

        .tl-item {
            display: grid;
            grid-template-columns: 108px 1fr;
            gap: 0;
        }

        .tl-ver {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-muted);
            text-align: right;
            padding: 22px 24px 0 0;
            line-height: 1;
        }
        .tl-item.major .tl-ver { color: var(--lime); }

        .tl-body {
            padding: 16px 0 36px 32px;
            position: relative;
        }
        .tl-body::before {
            content: '';
            position: absolute;
            left: -4px; top: 24px;
            width: 8px; height: 8px;
            border-radius: 50%;
            background: var(--bg-4);
            border: 1px solid var(--border-2);
        }
        .tl-item.major .tl-body::before {
            background: var(--lime);
            border-color: var(--lime);
            box-shadow: 0 0 10px rgba(158,255,0,0.45);
        }

        .tl-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 7px;
            line-height: 1.3;
        }
        .tl-desc {
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.75;
            max-width: 620px;
        }
        .tl-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 12px;
        }
        .tl-tag {
            font-family: var(--mono);
            font-size: 10px;
            padding: 2px 8px;
            border-radius: 3px;
            background: var(--bg-3);
            border: 1px solid var(--border);
            color: var(--text-muted);
        }
        .tl-tag.hi {
            background: var(--lime-glow);
            border-color: rgba(158,255,0,0.22);
            color: var(--lime);
        }

        /* ── DSP FLOW ────────────────────────────────────────────────────────── */
        .dsp-flow {
            display: flex;
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            max-width: 500px;
        }
        .dsp-node {
            background: var(--bg-3);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 10px 18px;
            font-family: var(--mono);
            font-size: 11.5px;
            color: var(--text-dim);
        }
        .dsp-node.entry { border-color: rgba(0,174,255,0.35); color: var(--blue); }
        .dsp-node.key   { border-color: rgba(158,255,0,0.3); color: var(--lime); background: rgba(158,255,0,0.03); }
        .dsp-node.exit  { border-color: rgba(158,255,0,0.5); color: var(--lime); }
        .dsp-sub {
            font-size: 11px;
            color: var(--blue);
            margin-top: 3px;
        }
        .dsp-arrow {
            font-family: var(--mono);
            font-size: 13px;
            color: var(--blue);
            padding: 4px 0 4px 18px;
        }

        /* ── CODE BLOCKS ─────────────────────────────────────────────────────── */
        .code-label {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .code-block {
            background: var(--bg-3);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 22px 26px;
            font-family: var(--mono);
            font-size: 12px;
            line-height: 1.85;
            color: var(--blue);
            overflow-x: auto;
            margin: 24px 0;
            white-space: pre;
        }
        .code-block .cm  { color: var(--text-muted); }
        .code-block .kw  { color: var(--lime); }
        .code-block .st  { color: #e07070; }
        .code-block .nb  { color: #c8a96e; }

        /* ── RESEARCH BLOCK ──────────────────────────────────────────────────── */
        .research-block {
            background: var(--bg-2);
            border-left: 2px solid #10a37f;
            border-radius: 0 8px 8px 0;
            padding: 22px 26px;
            margin: 28px 0;
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.85;
            max-width: var(--max-prose);
        }
        .research-label {
            font-family: var(--mono);
            font-size: 9px;
            color: #10a37f;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        /* ── DESIGN CARDS ────────────────────────────────────────────────────── */
        .design-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
            margin-top: 44px;
        }
        .design-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 26px;
        }
        .design-card-label {
            font-family: var(--mono);
            font-size: 9px;
            color: var(--lime);
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .design-card-title {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 10px;
        }
        .design-card-body {
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.75;
        }

        /* ── APP SCREENSHOT ──────────────────────────────────────────────────── */
        .app-screenshot-block {
            margin: 44px 0 8px;
            max-width: var(--max-prose);
        }
        .app-screenshot-frame {
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
            background: #040507;
        }
        .app-screenshot-chrome {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 14px;
            background: #0a0d14;
            border-bottom: 1px solid var(--border);
        }
        .app-screenshot-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
        }
        .app-screenshot-dot:nth-child(1) { background: rgba(255,95,86,0.40); }
        .app-screenshot-dot:nth-child(2) { background: rgba(255,189,46,0.32); }
        .app-screenshot-dot:nth-child(3) { background: rgba(39,201,63,0.32); }
        .app-screenshot-url {
            font-family: var(--mono);
            font-size: 10px;
            color: var(--text-muted);
            margin-left: 10px;
            letter-spacing: 0.03em;
        }
        .app-screenshot-img {
            width: 100%;
            display: block;
        }
        .app-screenshot-caption {
            margin-top: 14px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .app-screenshot-caption-label {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-dim);
            letter-spacing: 0.04em;
        }
        .app-screenshot-zones {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .app-screenshot-zone {
            font-family: var(--mono);
            font-size: 10px;
            color: var(--blue);
            background: rgba(0,174,255,0.05);
            border: 1px solid rgba(0,174,255,0.14);
            border-radius: 4px;
            padding: 3px 9px;
        }

        /* ── SECURITY FLOW ───────────────────────────────────────────────────── */
        .sec-flow {
            display: flex;
            flex-direction: column;
            gap: 0;
            max-width: 480px;
            margin-top: 32px;
        }
        .sec-node {
            background: var(--bg-3);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 12px 18px;
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-dim);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .sec-node.l1 { border-color: rgba(0,174,255,0.3); color: var(--blue); }
        .sec-node.l2 { border-color: rgba(158,255,0,0.25); color: var(--lime); }
        .sec-node.l3 { border-color: rgba(200,169,110,0.25); color: #c8a96e; }
        .sec-badge {
            font-size: 9px;
            padding: 2px 7px;
            border-radius: 3px;
            flex-shrink: 0;
            letter-spacing: 0.1em;
        }
        .sec-badge.b1 { background: var(--blue-glow); color: var(--blue); border: 1px solid rgba(0,174,255,0.2); }
        .sec-badge.b2 { background: var(--lime-glow); color: var(--lime); border: 1px solid rgba(158,255,0,0.2); }
        .sec-badge.b3 { background: rgba(200,169,110,0.08); color: #c8a96e; border: 1px solid rgba(200,169,110,0.2); }
        .sec-arrow {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            padding: 4px 0 4px 18px;
        }

        /* ── SKILLS ──────────────────────────────────────────────────────────── */
        .skills-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 44px;
        }
        .skills-col-header {
            font-family: var(--mono);
            font-size: 10px;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--text-muted);
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 4px;
        }
        .skill-row {
            padding: 15px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 14px;
        }
        .skill-name {
            font-size: 14px;
            font-weight: 400;
            color: var(--text);
            margin-bottom: 3px;
        }
        .skill-detail {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            line-height: 1.5;
        }
        .skill-dot {
            font-family: var(--mono);
            font-size: 10px;
            flex-shrink: 0;
            padding-top: 3px;
        }
        .skill-dot.tech   { color: var(--lime); }
        .skill-dot.human  { color: var(--blue); }

        /* ── CHALLENGES ──────────────────────────────────────────────────────── */
        .challenge-list { margin-top: 44px; }

        .challenge-item {
            display: grid;
            grid-template-columns: 56px 1fr;
            gap: 28px;
            padding: 38px 0;
            border-bottom: 1px solid var(--border);
        }
        .challenge-item:last-child { border-bottom: none; }

        .ch-num {
            font-family: var(--mono);
            font-size: 34px;
            font-weight: 500;
            color: var(--text-muted);
            opacity: 0.3;
            line-height: 1;
            padding-top: 3px;
        }
        .ch-title {
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .ch-body {
            font-size: 14px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.85;
            max-width: var(--max-prose);
        }
        .ch-solution {
            margin-top: 18px;
            padding: 16px 20px;
            background: var(--lime-glow);
            border: 1px solid rgba(158,255,0,0.12);
            border-radius: 7px;
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.8;
            max-width: var(--max-prose);
        }
        .ch-solution-label {
            font-family: var(--mono);
            font-size: 9px;
            color: var(--lime);
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .ch-code {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--blue);
            background: var(--bg-3);
            padding: 1px 6px;
            border-radius: 3px;
            border: 1px solid var(--border);
        }

        /* ── RESULT ──────────────────────────────────────────────────────────── */
        .result-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
            margin-top: 44px;
        }
        .result-card {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 28px;
        }
        .result-card-label {
            font-family: var(--mono);
            font-size: 9px;
            color: var(--text-muted);
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .result-card-title {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 10px;
        }
        .result-card-body {
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.75;
        }

        /* ── CLOSING ─────────────────────────────────────────────────────────── */
        .closing {
            max-width: 640px;
            margin: 72px auto 0;
            padding-top: 72px;
            border-top: 1px solid var(--border);
            text-align: center;
        }
        .closing-text {
            font-size: 21px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.65;
            margin-bottom: 36px;
        }
        .closing-text strong { color: var(--text); font-weight: 500; }

        .btn-cta {
            display: inline-block;
            font-family: var(--mono);
            font-size: 11px;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--lime);
            border: 1px solid rgba(158,255,0,0.3);
            padding: 13px 28px;
            border-radius: 4px;
            text-decoration: none;
            transition: background 0.2s, border-color 0.2s;
        }
        .btn-cta:hover {
            background: var(--lime-glow);
            border-color: var(--lime);
        }

        /* ── LANG SELECTOR ──────────────────────────────────────────────────── */
        .cs-lang-bar {
            position: fixed;
            top: 20px; right: 28px;
            z-index: 100;
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--bg-2);
            border: 1px solid var(--border-2);
            border-radius: 5px;
            overflow: hidden;
        }
        .cs-lang-btn {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.14em;
            padding: 7px 10px;
            background: transparent;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            border-right: 1px solid var(--border);
            transition: color 0.15s, background 0.15s;
        }
        .cs-lang-btn:last-child { border-right: none; }
        .cs-lang-btn:hover { color: var(--text); background: var(--bg-3); }
        .cs-lang-btn.active { color: var(--lime); background: var(--lime-glow); }

        /* ── FOOTER ──────────────────────────────────────────────────────────── */
        footer {
            border-top: 1px solid var(--border);
            padding: 36px 72px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .footer-brand {
            font-family: var(--mono);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-meta {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-muted);
        }

        /* ── 2-COL UTILITY ───────────────────────────────────────────────────── */
        .two-col-code {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 20px;
            align-items: start;
        }

        /* ── ARBITRAGE TABLE ─────────────────────────────────────────────────── */
        .tradeoff-grid {
            margin-top: 44px;
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
        }
        .tradeoff-row {
            display: grid;
            grid-template-columns: 1.8fr 1.4fr 2fr;
            border-bottom: 1px solid var(--border);
        }
        .tradeoff-row:last-child { border-bottom: none; }
        .tradeoff-row.header { background: var(--bg-3); }
        .tradeoff-cell {
            padding: 14px 20px;
            font-size: 13px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.6;
            border-right: 1px solid var(--border);
        }
        .tradeoff-cell:last-child { border-right: none; }
        .tradeoff-row.header .tradeoff-cell {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--text-muted);
            padding: 10px 20px;
        }
        .tradeoff-cell strong { color: var(--text); font-weight: 500; }
        .tradeoff-cell .ch-code {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--blue);
            background: var(--bg-3);
            padding: 1px 5px;
            border-radius: 3px;
            border: 1px solid var(--border);
        }

        /* ── ARCHITECTURE LAYERS ─────────────────────────────────────────────── */
        .arch-diagram {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 36px;
            max-width: 720px;
        }
        .arch-layer {
            background: var(--bg-3);
            border: 1px solid var(--border);
            border-radius: 7px;
            padding: 16px 20px;
        }
        .arch-layer.l-ui       { border-color: rgba(0,174,255,0.28); }
        .arch-layer.l-core     { border-color: rgba(158,255,0,0.22); }
        .arch-layer.l-security { border-color: rgba(200,169,110,0.25); }
        .arch-layer.l-infra    { border-color: var(--border-2); }
        .arch-layer-label {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .l-ui       .arch-layer-label { color: var(--blue); }
        .l-core     .arch-layer-label { color: var(--lime); }
        .l-security .arch-layer-label { color: #c8a96e; }
        .l-infra    .arch-layer-label { color: var(--text-muted); }
        .arch-modules {
            display: flex;
            flex-wrap: wrap;
            gap: 7px;
        }
        .arch-mod {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-dim);
            background: var(--bg-4);
            border: 1px solid var(--border);
            padding: 4px 10px;
            border-radius: 4px;
        }
        .arch-connector {
            font-family: var(--mono);
            font-size: 11px;
            color: var(--text-muted);
            text-align: center;
            padding: 0;
            line-height: 1;
        }

        /* ── METRICS BAR ─────────────────────────────────────────────────────── */
        .metrics-bar {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1px;
            background: var(--border);
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
            margin-top: 44px;
        }
        .metric-item {
            background: var(--bg-2);
            padding: 20px 20px;
        }
        .metric-val {
            font-family: var(--mono);
            font-size: 18px;
            color: var(--lime);
            font-weight: 500;
            line-height: 1;
            margin-bottom: 7px;
        }
        .metric-lbl {
            font-size: 12px;
            color: var(--blue);
            line-height: 1.45;
        }

        /* ── IA DID NOT ──────────────────────────────────────────────────────── */
        .ia-not-section {
            margin-top: 56px;
            padding-top: 44px;
            border-top: 1px solid var(--border);
        }
        .ia-not-header {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.28em;
            text-transform: uppercase;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 22px;
        }
        .ia-not-header::after {
            content: '';
            height: 1px;
            flex: 1;
            background: var(--border);
        }
        .ia-not-title {
            font-size: clamp(18px, 2vw, 22px);
            font-weight: 400;
            color: var(--text);
            margin-bottom: 28px;
        }
        .ia-not-title .hl { color: var(--blue); }
        .ia-not-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .ia-not-item {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            display: grid;
            grid-template-columns: 20px 1fr;
            gap: 18px;
            align-items: start;
        }
        .ia-not-item:last-child { border-bottom: none; }
        .ia-not-marker {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            padding-top: 1px;
        }
        .ia-not-name {
            font-size: 14px;
            font-weight: 400;
            color: var(--text);
            margin-bottom: 3px;
        }
        .ia-not-detail {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            line-height: 1.55;
        }

        /* ── AI QUESTION CONCLUSION ──────────────────────────────────────────── */
        .ai-conclusion {
            padding: 96px 72px;
            max-width: 1280px;
            margin: 0 auto;
        }
        .ai-q-block {
            max-width: 720px;
            margin: 52px 0 0;
        }
        .ai-q-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 14px;
        }
        .ai-q-badge {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            padding: 4px 10px;
            border-radius: 3px;
            border: 1px solid rgba(139,92,246,0.3);
            background: rgba(139,92,246,0.07);
            color: #8b5cf6;
            flex-shrink: 0;
        }
        .ai-q-meta {
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
        }
        .ai-q-text {
            background: var(--bg-2);
            border: 1px solid rgba(139,92,246,0.18);
            border-left: 3px solid #8b5cf6;
            border-radius: 0 8px 8px 0;
            padding: 20px 24px;
            font-size: 14px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.8;
            font-style: italic;
            margin-bottom: 40px;
        }
        .ai-a-label {
            font-family: var(--mono);
            font-size: 9px;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--lime);
            margin-bottom: 18px;
        }
        .ai-a-text {
            font-size: 16px;
            font-weight: 300;
            color: var(--text-dim);
            line-height: 1.8;
        }
        .ai-a-text strong { color: var(--text); font-weight: 500; }
        .ai-a-text p { margin-bottom: 20px; }
        .ai-a-text p:last-child { margin-bottom: 0; }
        .ai-conclusion-cta {
            margin-top: 52px;
        }
        .cs-signature {
            margin-top: 28px;
            font-family: var(--mono);
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.08em;
        }
        .cs-signature span {
            color: var(--lime);
            font-weight: 500;
        }
        .ai-footnote {
            margin-top: 20px;
            font-family: var(--mono);
            font-size: 12px;
            color: var(--blue);
            max-width: 600px;
            line-height: 1.7;
        }

        /* ── RESPONSIVE ──────────────────────────────────────────────────────── */
        @media (max-width: 960px) {
            .hero { padding: 0 32px 64px; }
            .section, .section-wide { padding: 72px 32px; }
            .three-col, .two-col-code, .skills-grid,
            .result-grid, .design-grid { grid-template-columns: 1fr; }
            .proof-bar { flex-direction: column; }
            .proof-item { border-right: none; border-bottom: 1px solid var(--border); }
            .proof-item:last-child { border-bottom: none; }
            footer { flex-direction: column; gap: 12px; text-align: center; padding: 32px; }
            .timeline::before { left: 72px; }
            .tl-item { grid-template-columns: 72px 1fr; }
            .metrics-bar { grid-template-columns: repeat(3, 1fr); }
            .tradeoff-row { grid-template-columns: 1fr; }
            .tradeoff-cell { border-right: none; border-bottom: 1px solid var(--border); padding: 10px 16px; }
            .tradeoff-row:last-child .tradeoff-cell:last-child { border-bottom: none; }
            .ai-conclusion { padding: 72px 32px; }
        }