/* ============================================================
           Variables
           ============================================================ */
        :root {
            --bg-primary: #0a0a09;
            --bg-secondary: #121210;
            --bg-tertiary: #1a1918;
            --bg-elevated: #222220;

            --text-primary: #f5f5f3;
            --text-secondary: #9a9990;
            --text-tertiary: #5a5950;

            --accent: #4a90d9;
            --accent-hover: #5a9fe5;
            --accent-glow: rgba(74, 144, 217, 0.12);

            --border-subtle: rgba(255,255,255,0.05);
            --border-light: rgba(255,255,255,0.08);
            --border-medium: rgba(255,255,255,0.12);

            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;

            --transition: 0.2s ease;

            --section-padding: 120px 24px;
            --content-width: 1080px;
        }

        /* ============================================================
           Reset & Base
           ============================================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', system-ui, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
            line-height: 1.5;
        }

        a {
            color: var(--accent);
            text-decoration: none;
        }

        /* ============================================================
           Scroll Reveal Animations
           ============================================================ */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .reveal-delay-1 { transition-delay: 0.1s; }
        .reveal-delay-2 { transition-delay: 0.2s; }
        .reveal-delay-3 { transition-delay: 0.3s; }
        .reveal-delay-4 { transition-delay: 0.4s; }

        /* ============================================================
           Sticky Nav
           ============================================================ */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            background: rgba(10, 10, 9, 0.8);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background 0.3s ease;
        }

        .nav-inner {
            max-width: var(--content-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 52px;
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            text-decoration: none;
        }

        .nav-links {
            display: flex;
            gap: 32px;
        }

        .nav-links a {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        .nav-cta {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }

        .nav-cta:hover {
            color: var(--accent-hover);
        }

        /* ============================================================
           Section Commons
           ============================================================ */
        .section {
            padding: var(--section-padding);
        }

        .section-inner {
            max-width: var(--content-width);
            margin: 0 auto;
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-tertiary);
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 48px;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 24px;
        }

        .section-subtitle {
            font-size: 20px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 640px;
        }

        /* ============================================================
           Hero
           ============================================================ */
        .hero {
            min-height: 100vh;
            min-height: 100dvh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 40%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 500px;
            background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-title {
            font-size: 96px;
            font-weight: 800;
            letter-spacing: -0.04em;
            line-height: 1;
            margin-bottom: 8px;
            position: relative;
        }

        .hero-headline {
            font-size: 52px;
            font-weight: 600;
            letter-spacing: -0.03em;
            color: var(--text-secondary);
            margin-bottom: 32px;
            position: relative;
        }

        .hero-sub {
            font-size: 20px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 560px;
            margin: 0 auto 48px;
            position: relative;
        }

        .hero-form {
            position: relative;
            width: 100%;
            max-width: 440px;
        }

        .hero-form form {
            display: flex;
            gap: 8px;
        }

        .hero-form input[type="email"] {
            flex: 1;
            padding: 14px 18px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition);
        }

        .hero-form input[type="email"]:focus {
            border-color: var(--accent);
        }

        .hero-form input[type="email"]::placeholder {
            color: var(--text-tertiary);
        }

        .hero-form .btn-primary {
            padding: 14px 24px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            white-space: nowrap;
        }

        .hero-form .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

        .hero-form .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .hero-signin {
            margin-top: 16px;
            font-size: 13px;
            color: var(--text-tertiary);
            position: relative;
        }

        .hero-success {
            display: none;
            text-align: center;
            padding: 24px 0;
        }

        .hero-success .checkmark {
            font-size: 36px;
            margin-bottom: 12px;
            color: #34c759;
        }

        .hero-success .success-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .hero-success .success-sub {
            color: var(--text-secondary);
        }

        /* Auth state for invite holders */
        .hero-auth {
            display: none;
            flex-direction: column;
            align-items: center;
            gap: 12px;
            position: relative;
        }

        .google-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            padding: 14px 32px;
            background: #fff;
            color: #333;
            border: none;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }

        .google-btn:hover {
            background: #f0f0f0;
            transform: translateY(-1px);
        }

        .google-btn svg {
            width: 18px;
            height: 18px;
        }

        .auth-divider {
            display: flex;
            align-items: center;
            gap: 16px;
            width: 100%;
            max-width: 280px;
            color: var(--text-tertiary);
            font-size: 13px;
        }

        .auth-divider::before,
        .auth-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border-light);
        }

        .message-box {
            padding: 14px 24px;
            border-radius: var(--radius-md);
            margin-bottom: 20px;
            font-size: 14px;
        }

        .message-box.success {
            background: rgba(52, 199, 89, 0.1);
            border: 1px solid rgba(52, 199, 89, 0.2);
            color: #34c759;
        }

        .message-box.error {
            background: rgba(255, 69, 58, 0.1);
            border: 1px solid rgba(255, 69, 58, 0.2);
            color: #ff453a;
        }

        .hero-logged-in {
            display: none;
            text-align: center;
        }

        .hero-logged-in .btn-go {
            display: inline-flex;
            align-items: center;
            padding: 14px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: background var(--transition), transform var(--transition);
        }

        .hero-logged-in .btn-go:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

        /* ============================================================
           Concept Section
           ============================================================ */
        .concept {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .concept .section-inner {
            text-align: center;
        }

        .concept-description {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin: 0 auto 64px;
        }

        /* Four Pillars Grid */
        .pillars-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 64px;
        }

        .pillar-card {
            padding: 32px 24px;
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .pillar-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .pillar-card:hover {
            border-color: var(--border-medium);
            transform: translateY(-3px);
        }

        .pillar-card.p-identity::before { background: #c084fc; }
        .pillar-card.p-context::before { background: var(--accent); }
        .pillar-card.p-execution::before { background: #34d399; }
        .pillar-card.p-learning::before { background: #febc2e; }

        .pillar-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .pillar-card.p-identity .pillar-icon { background: rgba(192, 132, 252, 0.12); }
        .pillar-card.p-context .pillar-icon { background: rgba(74, 144, 217, 0.12); }
        .pillar-card.p-execution .pillar-icon { background: rgba(52, 211, 153, 0.12); }
        .pillar-card.p-learning .pillar-icon { background: rgba(254, 188, 46, 0.12); }

        .pillar-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .pillar-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .pillar-card p em {
            color: var(--text-primary);
            font-style: normal;
            font-weight: 500;
        }

        /* ============================================================
           Agents Section
           ============================================================ */
        .agents-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            margin-top: 64px;
        }

        .agent-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }

        .agent-card:hover {
            border-color: var(--border-medium);
            transform: translateY(-2px);
        }

        .agent-icon {
            font-size: 32px;
            margin-bottom: 16px;
        }

        .agent-name {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .agent-focus {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .agent-prompt {
            font-size: 13px;
            color: var(--text-tertiary);
            font-style: italic;
            line-height: 1.5;
            padding-top: 16px;
            border-top: 1px solid var(--border-subtle);
        }

        /* ============================================================
           How It Works Section
           ============================================================ */
        .how-it-works {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .demo-container {
            max-width: 720px;
            margin: 64px auto 0;
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            overflow: hidden;
        }

        .demo-header {
            padding: 16px 20px;
            background: var(--bg-tertiary);
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .demo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--text-tertiary);
        }

        .demo-dot.red { background: #ff5f57; }
        .demo-dot.yellow { background: #febc2e; }
        .demo-dot.green { background: #28c840; }

        .demo-messages {
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .demo-msg {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .demo-msg-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            background: var(--bg-elevated);
        }

        .demo-msg-avatar.user {
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
        }

        .demo-msg-body {
            flex: 1;
        }

        .demo-msg-name {
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .demo-msg-name .agent-tag {
            font-size: 11px;
            font-weight: 500;
            color: var(--accent);
            background: rgba(74, 144, 217, 0.1);
            padding: 2px 8px;
            border-radius: 10px;
            margin-left: 8px;
        }

        .demo-msg-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .demo-routing {
            padding: 12px 20px;
            background: var(--bg-tertiary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-tertiary);
        }

        .demo-routing .route-arrow {
            color: var(--accent);
        }

        .demo-routing .route-agent {
            padding: 3px 10px;
            background: rgba(74, 144, 217, 0.08);
            border: 1px solid rgba(74, 144, 217, 0.15);
            border-radius: 10px;
            color: var(--accent);
            font-weight: 500;
        }

        /* ============================================================
           Capabilities Section
           ============================================================ */
        .capabilities-list {
            margin-top: 80px;
            display: flex;
            flex-direction: column;
            gap: 120px;
        }

        .capability {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .capability:nth-child(even) {
            direction: rtl;
        }

        .capability:nth-child(even) > * {
            direction: ltr;
        }

        .capability-text .capability-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .capability-text h3 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 16px;
        }

        .capability-text p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .capability-screenshot {
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            aspect-ratio: 4/3;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 12px;
            overflow: hidden;
        }

        .capability-screenshot .placeholder-icon {
            font-size: 48px;
            opacity: 0.5;
        }

        .capability-screenshot .placeholder-label {
            font-size: 14px;
            color: var(--text-tertiary);
        }

        .capability-screenshot img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ============================================================
           Capability Mockups — shared styles
           ============================================================ */
        .mock {
            width: 100%;
            height: 100%;
            display: flex;
            font-family: -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
            font-size: 11px;
            line-height: 1.4;
            color: var(--text-primary);
            -webkit-font-smoothing: antialiased;
        }
        .mock * { box-sizing: border-box; }

        /* Sidebar for chat mock */
        .mock-sidebar {
            width: 28%;
            background: var(--bg-tertiary);
            border-right: 1px solid var(--border-subtle);
            padding: 14px 10px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow: hidden;
        }
        .mock-sidebar-title {
            font-size: 10px;
            font-weight: 600;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 6px;
            padding: 0 4px;
        }
        .mock-sidebar-item {
            padding: 7px 8px;
            border-radius: 6px;
            font-size: 10px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .mock-sidebar-item.active {
            background: rgba(74, 144, 217, 0.1);
            color: var(--text-primary);
        }

        /* Chat area */
        .mock-chat {
            flex: 1;
            display: flex;
            flex-direction: column;
            background: var(--bg-primary);
            overflow: hidden;
        }
        .mock-chat-header {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border-subtle);
            font-weight: 600;
            font-size: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mock-chat-body {
            flex: 1;
            padding: 12px 14px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            overflow: hidden;
        }
        .mock-user-msg {
            align-self: flex-end;
            background: var(--accent);
            color: #fff;
            padding: 6px 10px;
            border-radius: 10px 10px 2px 10px;
            max-width: 65%;
            font-size: 10px;
        }
        .mock-agent-msg {
            background: var(--bg-elevated);
            padding: 8px 10px;
            border-radius: 2px 10px 10px 10px;
            max-width: 75%;
        }
        .mock-agent-label {
            font-size: 9px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 3px;
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .mock-agent-text {
            font-size: 10px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .mock-msg-actions {
            display: flex;
            gap: 6px;
            margin-top: 4px;
            font-size: 9px;
        }
        .mock-msg-actions span {
            opacity: 0.4;
        }
        .mock-listen {
            font-size: 8px;
            color: var(--text-tertiary);
            margin-top: 3px;
            display: flex;
            align-items: center;
            gap: 3px;
        }
        .mock-handoff {
            text-align: center;
            font-size: 9px;
            color: var(--text-tertiary);
            padding: 4px 0;
        }
        .mock-input-bar {
            padding: 8px 14px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mock-input {
            flex: 1;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-light);
            border-radius: 16px;
            padding: 6px 12px;
            font-size: 10px;
            color: var(--text-tertiary);
        }
        .mock-send-btn {
            width: 24px;
            height: 24px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
        }

        /* Voice mock */
        .mock-voice {
            width: 100%;
            height: 100%;
            background: var(--bg-primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 16px;
            padding: 24px;
        }
        .mock-voice-status {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .mock-voice-wave {
            display: flex;
            align-items: center;
            gap: 3px;
            height: 40px;
        }
        .mock-voice-bar {
            width: 4px;
            border-radius: 2px;
            background: var(--accent);
        }
        @keyframes voicePulse {
            0%, 100% { transform: scaleY(0.3); }
            50% { transform: scaleY(1); }
        }
        .mock-voice-bar:nth-child(1) { height: 18px; animation: voicePulse 1.2s ease infinite 0s; }
        .mock-voice-bar:nth-child(2) { height: 28px; animation: voicePulse 1.2s ease infinite 0.1s; }
        .mock-voice-bar:nth-child(3) { height: 36px; animation: voicePulse 1.2s ease infinite 0.2s; }
        .mock-voice-bar:nth-child(4) { height: 40px; animation: voicePulse 1.2s ease infinite 0.3s; }
        .mock-voice-bar:nth-child(5) { height: 36px; animation: voicePulse 1.2s ease infinite 0.4s; }
        .mock-voice-bar:nth-child(6) { height: 28px; animation: voicePulse 1.2s ease infinite 0.5s; }
        .mock-voice-bar:nth-child(7) { height: 18px; animation: voicePulse 1.2s ease infinite 0.6s; }
        .mock-voice-bar:nth-child(8) { height: 30px; animation: voicePulse 1.2s ease infinite 0.15s; }
        .mock-voice-bar:nth-child(9) { height: 22px; animation: voicePulse 1.2s ease infinite 0.35s; }
        .mock-voice-bar:nth-child(10) { height: 32px; animation: voicePulse 1.2s ease infinite 0.45s; }
        .mock-voice-bar:nth-child(11) { height: 20px; animation: voicePulse 1.2s ease infinite 0.55s; }

        .mock-mic-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: 0 0 30px rgba(74, 144, 217, 0.35);
        }
        .mock-voice-transcript {
            background: var(--bg-elevated);
            border-radius: 10px;
            padding: 10px 16px;
            font-size: 11px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 80%;
            line-height: 1.5;
        }
        .mock-voice-hint {
            font-size: 10px;
            color: var(--text-tertiary);
        }
        .mock-voice-agent-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 10px;
            color: var(--text-tertiary);
        }
        .mock-voice-agent-bar .va-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #28c840;
        }

        /* Knowledge mock */
        .mock-knowledge {
            width: 100%;
            height: 100%;
            background: var(--bg-primary);
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }
        .mock-kb-header {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .mock-kb-title {
            font-size: 13px;
            font-weight: 600;
        }
        .mock-kb-search {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-light);
            border-radius: 8px;
            padding: 5px 10px;
            font-size: 10px;
            color: var(--text-tertiary);
            width: 160px;
        }
        .mock-kb-tabs {
            display: flex;
            gap: 0;
            border-bottom: 1px solid var(--border-subtle);
            padding: 0 16px;
        }
        .mock-kb-tab {
            padding: 8px 14px;
            font-size: 10px;
            color: var(--text-tertiary);
            border-bottom: 2px solid transparent;
        }
        .mock-kb-tab.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .mock-kb-body {
            flex: 1;
            padding: 12px 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            overflow: hidden;
        }
        .mock-doc-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: 8px;
            padding: 10px 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .mock-doc-icon {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }
        .mock-doc-info { flex: 1; overflow: hidden; }
        .mock-doc-name {
            font-size: 10px;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .mock-doc-meta {
            font-size: 9px;
            color: var(--text-tertiary);
            display: flex;
            gap: 8px;
            margin-top: 2px;
        }
        .mock-tier {
            font-size: 8px;
            font-weight: 600;
            padding: 1px 6px;
            border-radius: 4px;
            letter-spacing: 0.05em;
        }
        .mock-tier.t1 { background: rgba(74, 144, 217, 0.15); color: var(--accent); }
        .mock-tier.t2 { background: rgba(255, 180, 50, 0.12); color: #e8a830; }
        .mock-gap-badge {
            font-size: 8px;
            padding: 1px 6px;
            border-radius: 4px;
            background: rgba(255, 95, 87, 0.12);
            color: #ff5f57;
            font-weight: 600;
        }

        /* Admin mock */
        .mock-admin {
            width: 100%;
            height: 100%;
            background: var(--bg-primary);
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }
        .mock-admin-header {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .mock-admin-nav {
            display: flex;
            gap: 12px;
            font-size: 10px;
            color: var(--text-tertiary);
        }
        .mock-admin-nav span.active { color: var(--accent); }
        .mock-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
            padding: 14px 16px;
        }
        .mock-stat-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: 8px;
            padding: 10px;
        }
        .mock-stat-label {
            font-size: 9px;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .mock-stat-value {
            font-size: 20px;
            font-weight: 700;
            margin-top: 2px;
        }
        .mock-stat-change {
            font-size: 9px;
            color: #28c840;
            margin-top: 1px;
        }
        .mock-chart-area {
            flex: 1;
            margin: 0 16px 12px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: 8px;
            padding: 12px;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }
        .mock-chart-title {
            font-size: 10px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .mock-chart-bars {
            flex: 1;
            display: flex;
            align-items: flex-end;
            gap: 6px;
            padding-top: 8px;
        }
        .mock-chart-col {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
        }
        .mock-chart-bar {
            width: 100%;
            border-radius: 3px 3px 0 0;
            background: var(--accent);
            opacity: 0.7;
        }
        .mock-chart-bar.secondary {
            background: rgba(74, 144, 217, 0.3);
        }
        .mock-chart-label {
            font-size: 8px;
            color: var(--text-tertiary);
        }
        .mock-activity-row {
            margin: 0 16px 12px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: 8px;
            padding: 10px 12px;
        }
        .mock-activity-title {
            font-size: 10px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .mock-activity-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 4px 0;
            font-size: 9px;
            color: var(--text-secondary);
        }
        .mock-activity-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ============================================================
           Persona Section
           ============================================================ */
        .persona {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            text-align: center;
        }

        .persona-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 64px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .persona-feature {
            padding: 32px 24px;
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            text-align: left;
        }

        .persona-feature .pf-icon {
            font-size: 28px;
            margin-bottom: 16px;
        }

        .persona-feature h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .persona-feature p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============================================================
           From MD Section
           ============================================================ */
        .from-md .section-inner {
            max-width: 760px;
            text-align: center;
        }

        .md-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            overflow: hidden;
            margin: 0 auto 32px;
            border: 2px solid var(--border-light);
        }

        .md-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .md-quote {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            text-align: left;
        }

        .md-quote p {
            margin-bottom: 20px;
        }

        .md-quote p:last-child {
            margin-bottom: 0;
        }

        .md-quote .emphasis {
            color: var(--text-primary);
            font-weight: 500;
        }

        .md-signature {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            text-align: left;
        }

        .md-signature .sig-name {
            font-size: 16px;
            font-weight: 600;
        }

        .md-signature .sig-title {
            font-size: 14px;
            color: var(--text-tertiary);
            margin-top: 4px;
        }

        /* ============================================================
           Tech Specs Section
           ============================================================ */
        .specs {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .specs .section-inner {
            text-align: center;
        }

        /* Architecture Diagram */
        .arch-diagram {
            background: var(--bg-primary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-xl);
            padding: 40px;
            margin-top: 64px;
            position: relative;
            overflow: hidden;
        }

        .arch-diagram::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            opacity: 0.4;
        }

        .arch-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 32px;
        }

        .arch-header h3 {
            font-size: 18px;
            font-weight: 600;
        }

        .arch-version {
            font-size: 13px;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        .arch-layers {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .arch-row {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .arch-row-label {
            width: 110px;
            flex-shrink: 0;
            font-size: 11px;
            font-weight: 600;
            color: var(--text-tertiary);
            text-align: right;
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        .arch-row-boxes {
            display: flex;
            gap: 6px;
            flex: 1;
        }

        .arch-box {
            flex: 1;
            padding: 12px 10px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 500;
            text-align: center;
            transition: transform 0.2s ease;
        }

        .arch-box:hover {
            transform: translateY(-2px);
        }

        .arch-box.ab-interface {
            background: rgba(192, 132, 252, 0.08);
            border: 1px solid rgba(192, 132, 252, 0.18);
            color: #c084fc;
        }

        .arch-box.ab-agent {
            background: rgba(52, 211, 153, 0.08);
            border: 1px solid rgba(52, 211, 153, 0.18);
            color: #34d399;
        }

        .arch-box.ab-knowledge {
            background: rgba(74, 144, 217, 0.08);
            border: 1px solid rgba(74, 144, 217, 0.18);
            color: var(--accent);
        }

        .arch-box.ab-learning {
            background: rgba(254, 188, 46, 0.08);
            border: 1px solid rgba(254, 188, 46, 0.18);
            color: #febc2e;
        }

        .arch-wide {
            flex: 1;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            font-size: 14px;
            font-weight: 600;
            text-align: center;
        }

        .arch-desc {
            font-size: 11px;
            font-weight: 400;
            opacity: 0.6;
            margin-top: 4px;
        }

        .arch-models {
            margin-top: 14px;
            display: flex;
            justify-content: center;
        }

        .arch-models-box {
            padding: 12px 40px;
            border: 1px dashed var(--text-tertiary);
            border-radius: var(--radius-md);
            font-size: 13px;
            color: var(--text-tertiary);
            text-align: center;
        }

        .arch-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 48px;
        }

        .arch-stat {
            text-align: center;
        }

        .arch-stat .number {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .arch-stat .number.accent {
            color: var(--accent);
        }

        .arch-stat .label {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-top: 4px;
        }

        /* ============================================================
           CTA Section
           ============================================================ */
        .cta-section {
            text-align: center;
            padding: 120px 24px;
        }

        .cta-section .section-inner {
            max-width: 560px;
        }

        .cta-title {
            font-size: 48px;
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 16px;
        }

        .cta-sub {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 48px;
            line-height: 1.6;
        }

        .cta-form {
            width: 100%;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-form form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-form input {
            padding: 14px 18px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition);
        }

        .cta-form input:focus {
            border-color: var(--accent);
        }

        .cta-form input::placeholder {
            color: var(--text-tertiary);
        }

        .cta-form .btn-primary {
            padding: 16px 32px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }

        .cta-form .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

        .cta-form .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .cta-success {
            display: none;
            padding: 24px 0;
        }

        .cta-success .checkmark {
            font-size: 36px;
            margin-bottom: 12px;
            color: #34c759;
        }

        .cta-success .success-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .cta-success .success-sub {
            color: var(--text-secondary);
        }

        /* ============================================================
           Footer
           ============================================================ */
        .site-footer {
            padding: 24px;
            text-align: center;
            color: var(--text-tertiary);
            font-size: 13px;
            border-top: 1px solid var(--border-subtle);
        }

        .site-footer a {
            color: var(--text-tertiary);
            margin-left: 16px;
        }

        .site-footer a:hover {
            color: var(--text-secondary);
        }

        /* ============================================================
           Responsive
           ============================================================ */
        @media (max-width: 960px) {
            :root {
                --section-padding: 80px 24px;
            }

            .section-title {
                font-size: 36px;
            }

            .pillars-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .agents-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .capability {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .capability:nth-child(even) {
                direction: ltr;
            }

            .arch-diagram {
                padding: 28px;
            }

            .arch-row-label {
                width: 80px;
                font-size: 10px;
            }

            .arch-box {
                font-size: 11px;
                padding: 10px 6px;
            }

            .arch-wide {
                font-size: 12px;
                padding: 14px 16px;
            }

            .arch-stats {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero-title {
                font-size: 64px;
            }

            .hero-headline {
                font-size: 36px;
            }

            .hero-sub {
                font-size: 17px;
            }

            .hero-form form {
                flex-direction: column;
            }

            .pillars-grid {
                grid-template-columns: 1fr;
            }

            .agents-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .persona-features {
                grid-template-columns: 1fr;
            }

            .capability-text h3 {
                font-size: 28px;
            }

            .cta-title {
                font-size: 36px;
            }

            .arch-diagram {
                padding: 20px;
            }

            .arch-row {
                flex-direction: column;
                gap: 6px;
                align-items: stretch;
            }

            .arch-row-label {
                width: auto;
                text-align: left;
            }

            .arch-row-boxes {
                flex-wrap: wrap;
            }

            .arch-models-box {
                padding: 10px 20px;
                font-size: 12px;
            }

            .arch-stats {
                gap: 16px;
            }

            .arch-stat .number {
                font-size: 22px;
            }
        }

        @media (max-width: 480px) {
            :root {
                --section-padding: 64px 16px;
            }

            .hero-title {
                font-size: 52px;
            }

            .hero-headline {
                font-size: 28px;
            }

            .section-title {
                font-size: 28px;
            }

            .agents-grid {
                grid-template-columns: 1fr;
            }

            .arch-box {
                font-size: 10px;
                padding: 8px 4px;
            }
        }