/* --- CORE STYLES (NO CDN REQUIRED) --- */
        :root {
            --primary: #2563eb; /* Royal Blue */
            --primary-dark: #1d4ed8;
            --primary-light: #eff6ff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --success: #22c55e;
            --danger: #ef4444;
            --radius: 12px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --header-h: 80px;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html, body { max-width: 100%; overflow-x: hidden; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-main);
            line-height: 1.5;
            background-color: white;
            padding-top: var(--header-h);
        }

        a { text-decoration: none; color: inherit; transition: 0.16s ease; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        
        /* --- LAYOUT --- */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        section { padding: 80px 0; }
        
        /* --- TYPOGRAPHY --- */
        h1 { font-size: 3.5rem; font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -0.02em; }
        h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 20px; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 12px; }
        p { color: var(--text-muted); font-size: 1.125rem; margin-bottom: 20px; }
        .highlight { color: var(--primary); }
        
        /* --- BUTTONS --- */
        .btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            border: none;
            text-align: center;
            min-height: 48px;
            transition: background-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
        }
        .btn-primary {
            background-color: var(--primary);
            color: white;
            box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover { background-color: var(--primary-dark); transform: translateY(-2px); }
        .btn-secondary {
            background-color: white;
            border: 2px solid #e2e8f0;
            color: var(--text-main);
        }
        .btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
        .btn-outline {
            background-color: #f8fafc;
            border: 2px solid #e2e8f0;
            color: var(--text-main);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary); background-color: #eff6ff; }
        
        /* --- HEADER --- */
        header {
            position: fixed;
            top: 0; left: 0; right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #e2e8f0;
            z-index: 1000;
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; width: 100%; }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo span {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            text-transform: uppercase;
        }
        .logo { height: 72px; width: auto; }
        .logo--footer { height: 56px; }
        .nav-links { display: flex; gap: 30px; }
        .nav-links a { font-weight: 500; font-size: 0.95rem; }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a.is-active { color: var(--primary); font-weight: 600; }
        .cta-small { background: var(--primary); color: white !important; padding: 10px 20px; border-radius: 8px; }

        /* --- HERO SECTION --- */
        .hero {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            padding-top: 180px;
            padding-bottom: 100px;
            overflow: hidden;
        }
        .hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px; align-items: center; }
        .trust-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: white; padding: 6px 16px; border-radius: 50px;
            border: 1px solid #bfdbfe; font-size: 0.9rem; font-weight: 600; color: var(--primary-dark);
            margin-bottom: 24px;
        }
        .dot { width: 8px; height: 8px; background: var(--success); border-radius: 50%; }
        .subtext { font-size: 0.9rem; color: #64748b; margin-top: 12px; }

        /* --- VISUAL PHONE MOCKUP --- */
        .phone-card {
            background: white;
            border-radius: 24px;
            padding: 30px;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255,255,255,0.5);
            transform: rotate(-2deg);
            transition: transform 0.18s ease;
            max-width: 400px;
            margin: 0 auto;
        }
        .phone-card:hover { transform: rotate(0deg) scale(1.02); }
        .tx-row {
            display: flex; justify-content: space-between; align-items: center;
            background: #f8fafc; padding: 15px; border-radius: 12px; margin-bottom: 15px;
        }
        .tx-icon { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; margin-right: 15px; }
        .tx-details h4 { font-size: 0.9rem; margin: 0; font-weight: 600; }
        .tx-details span { font-size: 0.8rem; color: #94a3b8; }
        .tx-amount { font-weight: 700; font-size: 1rem; }
        .tx-negative { color: var(--text-main); }
        .tx-positive { color: var(--success); }

        /* --- CARDS GRID (Pain/Solution) --- */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
        
        .card {
            background: white;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid #e2e8f0;
            box-shadow: var(--shadow);
            transition: 0.3s;
        }
        .card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
        .icon-box {
            width: 60px; height: 60px; background: var(--primary-light); color: var(--primary);
            border-radius: 12px; display: flex; align-items: center; justify-content: center;
            font-size: 24px; margin-bottom: 20px;
        }
        
        /* --- STEP PROCESS --- */
        .step-card { text-align: center; background: white; padding: 25px; border-radius: 16px; border: 1px solid #f1f5f9; }
        .step-circle {
            width: 80px; height: 80px; background: var(--primary-light); color: var(--primary);
            border-radius: 50%; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center;
            font-size: 32px; border: 4px solid white; box-shadow: 0 0 0 2px var(--primary-light);
        }

        /* --- DARK SECTION (Credit) --- */
        .bg-dark { background-color: #0f172a; color: white; }
        .bg-dark h2, .bg-dark p { color: white; }
        .bg-dark p { opacity: 0.8; }
        .feature-list li { display: flex; align-items: center; margin-bottom: 15px; color: #cbd5e1; font-size: 1.1rem; }
        .check { color: var(--success); margin-right: 10px; font-weight: bold; }
        
        .credit-visual {
            background: #1e293b; border-radius: 20px; padding: 40px; border: 1px solid #334155;
        }
        .limit-display { display: flex; justify-content: space-between; margin-bottom: 30px; }
        .big-num { font-size: 2.5rem; font-weight: 800; color: white; }

        /* --- COMPARISON --- */
        .comparison-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 40px; }
        .comp-card { padding: 40px; border: 1px solid #e2e8f0; }
        .comp-bad { background: #fef2f2; border-color: #fee2e2; border-radius: 16px 0 0 16px; }
        .comp-good { background: white; border-color: var(--primary); border-width: 2px; border-radius: 16px; box-shadow: var(--shadow-lg); transform: scale(1.05); z-index: 10; position: relative; }
        .list-item { display: flex; margin-bottom: 15px; font-size: 1.05rem; }

        /* --- CALCULATOR --- */
        .calc-hero {
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
            padding-top: 140px;
        }
        .calc-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px;
        }
        .calc-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .tariff-card {
            background: white;
            border: 1px solid #e2e8f0;
            border-radius: 24px;
            padding: 32px;
            box-shadow: var(--shadow-lg);
        }
        .calc-card h3 { margin-bottom: 20px; }
        .calc-field { margin-bottom: 22px; }
        .calc-label {
            display: block;
            font-weight: 600;
            margin-bottom: 10px;
            font-size: 0.95rem;
        }
        .calc-help {
            font-size: 0.9rem;
            color: #64748b;
            margin-top: 8px;
        }
        .calc-range {
            width: 100%;
            margin: 16px 0 10px;
            appearance: none;
            -webkit-appearance: none;
            height: 8px;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary) var(--range-fill, 50%), #e2e8f0 var(--range-fill, 50%));
            outline: none;
        }
        .calc-range::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35);
            cursor: pointer;
            border: 2px solid white;
        }
        .calc-range::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.35);
            cursor: pointer;
            border: 2px solid white;
        }
        .calc-range::-moz-range-track {
            background: transparent;
        }
        .tax-toggle {
            display: flex;
            gap: 10px;
        }
        .tax-input {
            position: absolute;
            opacity: 0;
            pointer-events: none;
        }
        .tax-btn {
            flex: 1;
            padding: 12px 10px;
            font-size: 0.95rem;
        }
        .tax-input:checked + .tax-btn {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            box-shadow: 0 8px 16px rgba(37, 99, 235, 0.25);
        }
        .calc-results {
            display: grid;
            gap: 20px;
        }
        .calc-subcard {
            border: 1px solid #e2e8f0;
            border-radius: 18px;
            padding: 22px;
            background: white;
        }
        .calc-subcard--accent {
            border-color: #bfdbfe;
            background: #eff6ff;
        }
        .calc-accent-title {
            color: var(--primary);
        }
        .calc-row {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 1rem;
        }
        .calc-row span:last-child {
            text-align: right;
        }
        .calc-value {
            font-weight: 800;
            font-size: 1.05rem;
        }
        .calc-benefit {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px dashed #dbeafe;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--success);
        }
        .calc-benefit.is-negative {
            color: var(--danger);
        }
        .calc-cta {
            margin-top: 24px;
            display: flex;
            justify-content: center;
        }
        .calc-contact-section {
            background: #f8fafc;
            border-top: 1px solid #e2e8f0;
        }
        .calc-contact-shell {
            background: white;
            border-radius: 24px;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }
        .calc-contact-info {
            background: #1e3a8a;
            padding: 60px;
            color: white;
        }
        .calc-contact-info h2 { color: white; }
        .calc-contact-info p { color: #bfdbfe; }
        .calc-contact-form { padding: 60px; }
        .btn-full { width: 100%; }
        .calc-contact-legal {
            font-size: 0.75rem;
            text-align: center;
            margin-top: 15px;
            color: #94a3b8;
        }

        /* --- FORM --- */
        .form-box { background: white; padding: 40px; border-radius: 24px; box-shadow: var(--shadow-lg); }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.9rem; }
        .form-input {
            width: 100%; padding: 14px; border: 1px solid #cbd5e1; border-radius: 8px;
            font-size: 1rem; transition: border-color 0.16s ease, box-shadow 0.16s ease; outline: none;
            min-height: 48px;
        }
        .form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
        .custom-select { position: relative; }
        .custom-select__trigger {
            display: flex; align-items: center; justify-content: space-between; gap: 12px;
            background: white; cursor: pointer; text-align: left;
        }
        .custom-select__value { color: var(--text-main); }
        .custom-select__value.is-placeholder { color: #94a3b8; }
        .custom-select__chevron {
            width: 0; height: 0; border-left: 6px solid transparent; border-right: 6px solid transparent;
            border-top: 6px solid #64748b; transition: transform 0.16s ease;
        }
        .custom-select.is-open .custom-select__chevron { transform: rotate(180deg); }
        .custom-select__menu {
            position: absolute; top: calc(100% + 8px); left: 0; right: 0;
            background: white; border: 1px solid #e2e8f0; border-radius: 10px;
            box-shadow: var(--shadow); padding: 6px; z-index: 5;
            max-height: 220px; overflow-y: auto;
            opacity: 0; visibility: hidden; pointer-events: none;
            transform: translateY(-6px);
            transition: opacity 0.16s ease, transform 0.16s ease;
        }
        .custom-select.is-open .custom-select__menu {
            opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0);
        }
        .custom-select__option {
            padding: 10px 12px; border-radius: 8px; cursor: pointer;
            font-size: 0.98rem;
            transition: background-color 0.16s ease;
        }
        .custom-select__option:hover,
        .custom-select__option.is-active { background: var(--primary-light); }
        .form-status {
            margin-top: 12px;
            font-size: 0.9rem;
            min-height: 1.2em;
            color: var(--text-muted);
        }
        .form-status.is-success { color: var(--success); }
        .form-status.is-error { color: var(--danger); }
        .legal-text {
            line-height: 1.6;
        }
        .legal-text .legal-link {
            color: #1e40af;
            text-decoration: underline;
            text-decoration-thickness: 1px;
            text-underline-offset: 2px;
            display: inline-block;
            padding: 2px 4px;
            border-radius: 4px;
            cursor: pointer;
            transition: color 0.16s ease, background-color 0.16s ease;
        }
        .legal-text .legal-link:hover,
        .legal-text .legal-link:focus {
            color: var(--primary-dark);
            background-color: #eff6ff;
        }
        .legal-text .legal-link:active {
            color: var(--primary);
            background-color: #dbeafe;
        }
        .legal-text .legal-link:focus-visible {
            outline: 2px solid #93c5fd;
            outline-offset: 2px;
        }
        .site-footer {
            background: #ffffff;
            border-top: 1px solid #e2e8f0;
            padding: 40px 0;
        }
        .footer-grid {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
        }
        .footer-wordmark {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.6rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            color: var(--primary-dark);
        }
        .footer-meta {
            text-align: right;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .footer-meta a { color: inherit; }
        .footer-links {
            margin-top: 10px;
            display: inline-flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.9rem;
        }
        .footer-links a { color: var(--primary-dark); }

        /* --- DOCUMENT PAGES --- */
        .doc-page {
            background: #f8fafc;
            color: #0f172a;
            padding-top: var(--header-h);
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        }
        .doc-shell {
            min-height: 100vh;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            padding: 80px 20px;
        }
        .doc-window {
            width: min(960px, 100%);
            background: #ffffff;
            border: 1px solid #e2e8f0;
        }
        .doc-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 16px;
            border-bottom: 1px solid #e2e8f0;
            background: #f1f5f9;
        }
        .doc-dots {
            display: flex;
            gap: 8px;
        }
        .doc-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #475569;
        }
        .doc-dots .doc-dot:nth-child(1) { background: #ef4444; }
        .doc-dots .doc-dot:nth-child(2) { background: #f59e0b; }
        .doc-dots .doc-dot:nth-child(3) { background: #22c55e; }
        .doc-title {
            font-size: 0.85rem;
            color: #64748b;
        }
        .doc-content {
            padding: 28px 30px 36px;
            font-size: 0.95rem;
            line-height: 1.6;
            white-space: pre-wrap;
            color: #0f172a;
        }

        /* --- RESPONSIVE --- */
        @media (max-width: 900px) {
            h1 { font-size: clamp(2.2rem, 6vw, 3rem); }
            h2 { font-size: clamp(1.8rem, 5vw, 2.4rem); }
            .container { padding: 0 20px; }
            .hero-grid, .grid-3, .grid-4, .comparison-grid, .limit-display { grid-template-columns: 1fr; }
            .hero-grid > * { width: 100%; max-width: 100%; }
            .contact-grid { display: flex; flex-direction: column; }
            .contact-form, .contact-info { width: 100%; max-width: 100%; }
            .limit-display { flex-direction: column; gap: 16px; }
            .nav-links { display: none; } /* Simple hide for mobile demo */
            .comp-bad, .comp-good { border-radius: 16px; transform: none; margin-bottom: 20px; }
            .phone-card { margin-top: 40px; }
            .footer-grid { flex-direction: column; text-align: left; }
            .footer-meta { text-align: left; }
            .calc-grid { grid-template-columns: 1fr; }
            .tax-toggle { flex-direction: column; }
        }
        @media (max-width: 520px) {
            :root { --header-h: 56px; }
            h1 { font-size: clamp(2rem, 9vw, 2.6rem); }
            h2 { font-size: clamp(1.5rem, 7vw, 2rem); }
            .container { padding: 0 16px; }
            .btn, .form-input, .custom-select__trigger { min-height: 48px; }
            header { padding: 12px 0; }
            .nav-wrapper { gap: 12px; }
            .logo { height: 48px; }
            .logo--footer { height: 44px; }
            .cta-small {
                min-height: 40px;
                padding: 0 14px;
                font-size: 14px;
                line-height: 1;
                width: auto;
                display: inline-flex;
                align-items: center;
                justify-content: center;
                white-space: nowrap;
                box-shadow: none;
                border-radius: 12px;
            }
            .site-logo span { font-size: 1.2rem; }
            .phone-card { max-width: 100%; transform: none; }
            .hero { padding-top: 56px; }
            .legal-text .legal-link {
                padding: 6px 6px;
                margin: 2px 0;
            }
            .doc-shell {
                padding: 48px 16px;
            }
            .doc-content {
                padding: 22px 20px 28px;
                font-size: 0.9rem;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation: none !important;
                transition: none !important;
            }
            .phone-card { transform: none !important; }
        }