:root {
            --bg: #f5f7fb;
            --surface: #ffffff;
            --surface-alt: #eef3fb;
            --text: #1b2430;
            --muted: #5c6777;
            --line: #d9e1ee;
            --brand: #1f5eff;
            --brand-dark: #1746bf;
            --accent: #0f172a;
            --success: #e7f7ee;
            --shadow: 0 18px 50px rgba(19, 33, 68, 0.08);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 12px;
            --max: 1180px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background: linear-gradient(180deg, #f8fbff 0%, #f5f7fb 100%);
            color: var(--text);
            line-height: 1.55;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        .container {
            width: min(calc(100% - 32px), var(--max));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            backdrop-filter: blur(12px);
            background: rgba(248, 251, 255, 0.88);
            border-bottom: 1px solid rgba(217, 225, 238, 0.8);
        }

        .site-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            min-height: 72px;
        }

        .brand {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .brand-mark {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.04em;
        }

        .brand-tagline {
            font-size: 0.9rem;
            color: var(--muted);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 24px;
            color: var(--muted);
            font-size: 0.95rem;
        }

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

        .hero {
            padding: 72px 0 40px;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 32px;
            align-items: stretch;
        }

        .hero-copy,
        .hero-panel {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }

        .hero-copy {
            padding: 48px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 14px;
            border-radius: 999px;
            background: var(--surface-alt);
            color: var(--brand-dark);
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        h1 {
            margin: 0 0 18px;
            font-size: clamp(2.4rem, 5vw, 4.6rem);
            line-height: 0.98;
            letter-spacing: -0.05em;
        }

        .hero-copy p {
            margin: 0 0 18px;
            font-size: 1.08rem;
            color: var(--muted);
            max-width: 58ch;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 22px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.96rem;
            transition: 0.2s ease;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--brand);
            color: #ffffff;
        }

        .btn-primary:hover {
            background: var(--brand-dark);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--text);
            border-color: var(--line);
        }

        .btn-secondary:hover {
            border-color: #bfcadd;
            background: #f8fbff;
        }

        .hero-panel {
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 20px;
            background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
        }

        .panel-label {
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--muted);
            font-weight: 700;
        }

        .goal-card {
            padding: 20px;
            border-radius: var(--radius-md);
            background: #0f172a;
            color: #ffffff;
        }

        .goal-card .goal-title {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-bottom: 10px;
        }

        .goal-card .goal-amount {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            letter-spacing: -0.05em;
            margin-bottom: 8px;
        }

        .goal-card .goal-subtext {
            color: rgba(255,255,255,0.78);
            font-size: 0.95rem;
        }

        .metric-list {
            display: grid;
            gap: 14px;
        }

        .metric-item {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 12px;
            align-items: center;
            padding: 16px 18px;
            border-radius: var(--radius-sm);
            background: #ffffff;
            border: 1px solid var(--line);
        }

        .metric-item strong {
            display: block;
            font-size: 1rem;
        }

        .metric-item span {
            color: var(--muted);
            font-size: 0.92rem;
        }

        .metric-value {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--brand-dark);
        }

        .section {
            padding: 32px 0;
        }

        .section-header {
            max-width: 760px;
            margin-bottom: 24px;
        }

        .section-header h2 {
            margin: 0 0 12px;
            font-size: clamp(1.9rem, 3vw, 3rem);
            line-height: 1.05;
            letter-spacing: -0.04em;
        }

        .section-header p {
            margin: 0;
            color: var(--muted);
            font-size: 1.02rem;
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .step-card,
        .example-card,
        .audience-card,
        .problem-card,
        .cta-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }

        .step-card {
            padding: 28px;
        }

        .step-number {
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--surface-alt);
            color: var(--brand-dark);
            font-weight: 800;
            margin-bottom: 18px;
        }

        .step-card h3,
        .audience-card h3,
        .problem-card h3,
        .cta-card h3 {
            margin: 0 0 10px;
            font-size: 1.2rem;
            letter-spacing: -0.02em;
        }

        .step-card p,
        .audience-card p,
        .problem-card p,
        .cta-card p,
        .example-card p {
            margin: 0;
            color: var(--muted);
        }

        .example-card {
            overflow: hidden;
        }

        .example-grid {
            display: grid;
            grid-template-columns: 0.95fr 1.05fr;
        }

        .example-copy {
            padding: 34px;
            background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
        }

        .example-copy h3 {
            margin: 0 0 12px;
            font-size: 1.6rem;
            letter-spacing: -0.03em;
        }

        .example-highlight {
            margin-top: 22px;
            padding: 18px;
            border-radius: var(--radius-md);
            background: var(--success);
            border: 1px solid #c9ead4;
            color: #174c2b;
            font-weight: 700;
        }

        .example-math {
            padding: 34px;
            background: #0f172a;
            color: #ffffff;
        }

        .math-list {
            display: grid;
            gap: 14px;
            margin: 22px 0 0;
        }

        .math-row {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255,255,255,0.12);
        }

        .math-row:last-child {
            border-bottom: none;
        }

        .math-label {
            color: rgba(255,255,255,0.76);
        }

        .math-value {
            font-weight: 800;
        }

        .two-col {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 22px;
        }

        .audience-card,
        .problem-card {
            padding: 28px;
        }

        .check-list,
        .problem-list {
            margin: 18px 0 0;
            padding: 0;
            list-style: none;
            display: grid;
            gap: 12px;
        }

        .check-list li,
        .problem-list li {
            display: flex;
            gap: 10px;
            color: var(--muted);
        }

        .check-list li::before,
        .problem-list li::before {
            content: "•";
            color: var(--brand);
            font-weight: 800;
        }

        .cta-card {
            padding: 40px;
            text-align: center;
            background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
        }

        .cta-card p {
            max-width: 60ch;
            margin: 0 auto;
        }

        .cta-card .hero-actions {
            justify-content: center;
        }

        .site-footer {
            padding: 28px 0 50px;
            color: var(--muted);
            font-size: 0.94rem;
        }

        .site-footer-inner {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            border-top: 1px solid var(--line);
            padding-top: 24px;
        }

        @media (max-width: 980px) {
            .hero-grid,
            .example-grid,
            .two-col,
            .steps {
                grid-template-columns: 1fr;
            }

            .hero-copy,
            .hero-panel,
            .step-card,
            .audience-card,
            .problem-card,
            .cta-card,
            .example-copy,
            .example-math {
                padding: 24px;
            }
        }

        @media (max-width: 720px) {
            .nav {
                display: none;
            }

            .hero {
                padding-top: 40px;
            }

            .hero-copy {
                padding: 24px;
            }

            h1 {
                font-size: 2.3rem;
            }

            .site-footer-inner {
                flex-direction: column;
            }
        }