/* Reset & Base Variables */
        :root {
            --bg-main: #0B0F19;
            --bg-card: rgba(18, 25, 41, 0.75);
            --bg-card-border: rgba(0, 210, 255, 0.18);
            --primary-color: #F5A623;
            --primary-hover: #ffb942;
            --secondary-color: #00D2FF;
            --text-main: #E2E8F0;
            --text-muted: #94A3B8;
            --text-dark: #0B0F19;
            --accent-error: #FF4D4F;
            --accent-success: #52C41A;
            --grid-line: rgba(255, 255, 255, 0.03);
            --container-width: 1280px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
        }

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

        html {
            scroll-behavior: smooth;
            background-color: var(--bg-main);
            color: var(--text-main);
            font-family: var(--font-family);
            line-height: 1.6;
        }

        body {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background-color: var(--bg-main);
            background-image: 
                linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
                linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
            background-size: 32px 32px;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, input {
            font-family: inherit;
        }

        /* Container */
        .aisitex-container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Top Header / Navigation */
        .aisitex-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 210, 255, 0.12);
            transition: all 0.3s ease;
        }

        .aisitex-header.is-scrolled {
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            background: rgba(11, 15, 25, 0.95);
        }

        .aisitex-nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .aisitex-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: #FFFFFF;
        }

        .aisitex-brand-logo {
            height: 32px;
            width: auto;
        }

        .aisitex-brand-tag {
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(245, 166, 35, 0.15);
            border: 1px solid var(--primary-color);
            color: var(--primary-color);
            font-family: var(--font-mono);
        }

        .aisitex-nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-nav-link {
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            position: relative;
        }

        .aisitex-nav-link:hover {
            color: var(--secondary-color);
            background: rgba(0, 210, 255, 0.05);
        }

        .aisitex-nav-link.active {
            color: var(--primary-color);
            background: rgba(245, 166, 35, 0.1);
            font-weight: 600;
        }

        .aisitex-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--primary-color);
            box-shadow: 0 0 8px var(--primary-color);
        }

        /* Mobile Menu Button */
        .aisitex-menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--bg-card-border);
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: 6px;
            cursor: pointer;
        }

        /* Hero & Account Section */
        .aisitex-account-hero {
            padding: 56px 0 80px 0;
            position: relative;
        }

        .aisitex-hero-header {
            margin-bottom: 40px;
        }

        .aisitex-badge-node {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(0, 210, 255, 0.08);
            border: 1px solid rgba(0, 210, 255, 0.3);
            color: var(--secondary-color);
            font-size: 0.85rem;
            font-family: var(--font-mono);
            margin-bottom: 16px;
        }

        .aisitex-node-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            box-shadow: 0 0 8px var(--secondary-color);
            animation: nodePulse 2s infinite ease-in-out;
        }

        @keyframes nodePulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.8); }
        }

        .aisitex-hero-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: #FFFFFF;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .aisitex-hero-summary {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 800px;
        }

        /* Split Hero Grid Layout */
        .aisitex-account-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: stretch;
        }

        /* Left Visual Column */
        .aisitex-visual-card {
            background: var(--bg-card);
            border: 1px solid var(--bg-card-border);
            border-radius: 16px;
            overflow: hidden;
            position: relative;
            display: flex;
            flex-direction: column;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        .aisitex-visual-img-wrap {
            position: relative;
            width: 100%;
            height: 100%;
            min-height: 480px;
            overflow: hidden;
            background: #000;
        }

        .aisitex-visual-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            opacity: 0.85;
            transition: transform 0.6s ease;
        }

        .aisitex-visual-card:hover .aisitex-visual-img {
            transform: scale(1.03);
        }

        .aisitex-visual-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 25, 0.1) 0%, rgba(11, 15, 25, 0.85) 90%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 32px;
        }

        .aisitex-spec-badge {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--primary-color);
            letter-spacing: 1px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }

        .aisitex-visual-heading {
            font-size: 1.5rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
        }

        .aisitex-visual-desc {
            font-size: 0.9rem;
            color: rgba(226, 232, 240, 0.8);
            line-height: 1.5;
            margin-bottom: 20px;
        }

        .aisitex-status-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .aisitex-status-item {
            text-align: left;
        }

        .aisitex-status-val {
            font-family: var(--font-mono);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--secondary-color);
        }

        .aisitex-status-lbl {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Right Form Column */
        .aisitex-form-card {
            background: var(--bg-card);
            border: 1px solid var(--bg-card-border);
            border-radius: 16px;
            padding: 36px;
            position: relative;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            display: flex;
            flex-direction: column;
        }

        /* Tabs */
        .aisitex-form-tabs {
            display: flex;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 8px;
            padding: 4px;
            margin-bottom: 28px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .aisitex-tab-btn {
            flex: 1;
            padding: 10px;
            border: none;
            background: transparent;
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .aisitex-tab-btn.active {
            background: var(--primary-color);
            color: var(--text-dark);
            box-shadow: 0 4px 12px rgba(245, 166, 35, 0.3);
        }

        /* Form Group */
        .aisitex-form-group {
            margin-bottom: 20px;
        }

        .aisitex-form-label {
            display: block;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .aisitex-input-wrap {
            position: relative;
        }

        .aisitex-input {
            width: 100%;
            padding: 12px 16px;
            background: rgba(11, 15, 25, 0.7);
            border: 1px solid rgba(0, 210, 255, 0.2);
            border-radius: 8px;
            color: #FFFFFF;
            font-size: 0.95rem;
            outline: none;
            transition: all 0.25s ease;
        }

        .aisitex-input:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.15);
        }

        .aisitex-input.error {
            border-color: var(--accent-error);
        }

        .aisitex-field-msg {
            font-size: 0.8rem;
            color: var(--accent-error);
            margin-top: 4px;
            display: none;
        }

        .aisitex-field-msg.visible {
            display: block;
        }

        /* Terms Checkbox */
        .aisitex-terms-group {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 24px;
        }

        .aisitex-checkbox {
            appearance: none;
            width: 18px;
            height: 18px;
            border: 1px solid rgba(0, 210, 255, 0.4);
            border-radius: 4px;
            background: rgba(11, 15, 25, 0.7);
            cursor: pointer;
            margin-top: 2px;
            position: relative;
            flex-shrink: 0;
        }

        .aisitex-checkbox:checked {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .aisitex-checkbox:checked::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: var(--text-dark);
            font-weight: 900;
            font-size: 12px;
        }

        .aisitex-terms-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        .aisitex-terms-link {
            color: var(--secondary-color);
            text-decoration: underline;
        }

        /* Demo Notice */
        .aisitex-demo-notice {
            background: rgba(0, 210, 255, 0.05);
            border: 1px dashed rgba(0, 210, 255, 0.3);
            border-radius: 8px;
            padding: 10px 14px;
            font-size: 0.8rem;
            color: rgba(226, 232, 240, 0.75);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* Submit Button */
        .aisitex-btn-submit {
            width: 100%;
            padding: 14px;
            background: var(--primary-color);
            color: var(--text-dark);
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .aisitex-btn-submit:hover:not(:disabled) {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.35);
        }

        .aisitex-btn-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Alert Message */
        .aisitex-alert {
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.88rem;
            margin-bottom: 20px;
            display: none;
        }

        .aisitex-alert.visible {
            display: block;
        }

        .aisitex-alert-error {
            background: rgba(255, 77, 79, 0.15);
            border: 1px solid var(--accent-error);
            color: #FF7875;
        }

        .aisitex-alert-success {
            background: rgba(82, 196, 26, 0.15);
            border: 1px solid var(--accent-success);
            color: #73D13D;
        }

        /* Logged In View Card */
        .aisitex-session-card {
            display: none;
            flex-direction: column;
            gap: 20px;
        }

        .aisitex-session-card.visible {
            display: flex;
        }

        .aisitex-user-header {
            display: flex;
            align-items: center;
            gap: 16px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .aisitex-user-avatar {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            color: var(--text-dark);
            font-size: 1.4rem;
        }

        .aisitex-user-info {
            flex: 1;
        }

        .aisitex-user-name {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 4px;
        }

        .aisitex-user-status {
            font-size: 0.8rem;
            color: var(--accent-success);
            display: flex;
            align-items: center;
            gap: 6px;
            font-family: var(--font-mono);
        }

        .aisitex-status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent-success);
        }

        .aisitex-sync-nodes {
            background: rgba(11, 15, 25, 0.6);
            border-radius: 10px;
            padding: 16px;
            border: 1px solid rgba(0, 210, 255, 0.15);
        }

        .aisitex-sync-title {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            font-family: var(--font-mono);
        }

        .aisitex-node-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .aisitex-node-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.9rem;
        }

        .aisitex-node-name {
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-node-state {
            font-size: 0.78rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(82, 196, 26, 0.1);
            color: var(--accent-success);
            font-family: var(--font-mono);
        }

        .aisitex-btn-logout {
            width: 100%;
            padding: 12px;
            background: transparent;
            border: 1px solid rgba(255, 77, 79, 0.4);
            color: #FF7875;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .aisitex-btn-logout:hover {
            background: rgba(255, 77, 79, 0.1);
            border-color: var(--accent-error);
        }

        /* Security Pass Features Section */
        .aisitex-features-section {
            padding: 80px 0;
            border-top: 1px solid rgba(0, 210, 255, 0.1);
            background: rgba(11, 15, 25, 0.4);
        }

        .aisitex-section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px auto;
        }

        .aisitex-section-title {
            font-size: 1.85rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .aisitex-section-desc {
            font-size: 1rem;
            color: var(--text-muted);
        }

        .aisitex-features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .aisitex-feature-card {
            background: var(--bg-card);
            border: 1px solid var(--bg-card-border);
            border-radius: 12px;
            padding: 32px 24px;
            position: relative;
            transition: all 0.3s ease;
        }

        .aisitex-feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(245, 166, 35, 0.4);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
        }

        .aisitex-feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(245, 166, 35, 0.1);
            border: 1px solid rgba(245, 166, 35, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .aisitex-feature-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .aisitex-feature-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Multi-Device Bridge Banner */
        .aisitex-bridge-section {
            padding: 60px 0 90px 0;
        }

        .aisitex-bridge-card {
            background: linear-gradient(135deg, rgba(18, 25, 41, 0.9) 0%, rgba(11, 15, 25, 0.95) 100%);
            border: 1px solid rgba(0, 210, 255, 0.25);
            border-radius: 16px;
            padding: 40px;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .aisitex-bridge-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 14px;
        }

        .aisitex-bridge-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .aisitex-bridge-tags {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .aisitex-bridge-tag {
            padding: 6px 14px;
            border-radius: 6px;
            background: rgba(0, 210, 255, 0.1);
            border: 1px solid rgba(0, 210, 255, 0.2);
            color: var(--secondary-color);
            font-size: 0.85rem;
            font-family: var(--font-mono);
        }

        .aisitex-bridge-media {
            position: relative;
            text-align: center;
        }

        .aisitex-bridge-img {
            max-height: 280px;
            margin: 0 auto;
            border-radius: 12px;
            box-shadow: 0 16px 32px rgba(0, 0, 0, 0.6);
        }

        /* Footer */
        .aisitex-footer {
            margin-top: auto;
            background: #070A12;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 40px 0;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .aisitex-footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .aisitex-footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #FFFFFF;
            font-weight: 700;
        }

        .aisitex-footer-links {
            display: flex;
            gap: 20px;
        }

        .aisitex-footer-link:hover {
            color: var(--primary-color);
        }

        /* Modal Dialog for Terms */
        .aisitex-modal {
            position: fixed;
            inset: 0;
            z-index: 2000;
            background: rgba(0, 0, 0, 0.75);
            backdrop-filter: blur(8px);
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .aisitex-modal.visible {
            display: flex;
        }

        .aisitex-modal-content {
            background: var(--bg-main);
            border: 1px solid var(--bg-card-border);
            border-radius: 12px;
            max-width: 600px;
            width: 100%;
            max-height: 80vh;
            display: flex;
            flex-direction: column;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
        }

        .aisitex-modal-header {
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .aisitex-modal-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: #FFFFFF;
        }

        .aisitex-modal-close {
            background: transparent;
            border: none;
            color: var(--text-muted);
            font-size: 1.5rem;
            cursor: pointer;
            line-height: 1;
        }

        .aisitex-modal-body {
            padding: 24px;
            overflow-y: auto;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .aisitex-account-grid {
                grid-template-columns: 1fr;
            }
            
            .aisitex-visual-img-wrap {
                min-height: 320px;
            }

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

            .aisitex-bridge-card {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .aisitex-menu-toggle {
                display: block;
            }

            .aisitex-nav-menu {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 25, 0.98);
                border-bottom: 1px solid var(--bg-card-border);
                flex-direction: column;
                padding: 20px;
                gap: 12px;
                display: none;
            }

            .aisitex-nav-menu[aria-hidden="false"] {
                display: flex;
            }

            .aisitex-hero-title {
                font-size: 1.75rem;
            }

            .aisitex-form-card {
                padding: 24px 20px;
            }

            .aisitex-status-strip {
                grid-template-columns: 1fr;
                gap: 8px;
            }
        }