:root {
    --color-slate-950: #0a0e1a;
    --color-slate-900: #0f172a;
    --color-slate-800: #1e293b;
    --color-slate-700: #334155;
    --color-slate-600: #475569;
    --color-slate-400: #94a3b8;
    --color-slate-300: #cbd5e1;
    --color-slate-200: #e2e8f0;
    --color-slate-100: #f1f5f9;
    --color-slate-50: #f8fafc;
    --color-white: #ffffff;

    --color-emerald-500: #10b981;
    --color-emerald-600: #059669;
    --color-red-500: #ef4444;
    --color-blue-500: #3b82f6;
    --color-blue-600: #2563eb;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-slate-50);
    color: var(--color-slate-900);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.ledger-grid {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-slate-200);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-slate-900);
}

.nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--color-slate-600);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--color-slate-900);
}

.cta-link {
    padding: 0.5rem 1.25rem;
    background: var(--color-slate-900);
    color: var(--color-white);
    border-radius: 6px;
}

.cta-link:hover {
    background: var(--color-slate-800);
    color: var(--color-white);
}

/* Hero Section */
.hero-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding: 6rem 4rem;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-slate-200);
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.ledger-label {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--color-slate-100);
    color: var(--color-slate-700);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    width: fit-content;
    font-family: var(--font-mono);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-slate-900);
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--color-slate-600);
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn-primary,
.btn-secondary {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--color-slate-900);
    color: var(--color-white);
}

.btn-primary:hover {
    background: var(--color-slate-800);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-slate-700);
    border: 1.5px solid var(--color-slate-300);
}

.btn-secondary:hover {
    border-color: var(--color-slate-400);
    background: var(--color-slate-50);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
}

/* Ledger Card */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.ledger-card {
    background: var(--color-white);
    border: 1px solid var(--color-slate-200);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 2rem;
    width: 100%;
    max-width: 520px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-slate-200);
    margin-bottom: 1rem;
}

.card-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-slate-900);
    font-family: var(--font-mono);
}

.card-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-complete {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-emerald-600);
}

.ledger-entries {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.entry {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 1rem;
    padding: 0.75rem 0;
    align-items: center;
    font-size: 0.9375rem;
}

.entry-date {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-slate-500);
}

.entry-desc {
    color: var(--color-slate-700);
    font-weight: 500;
}

.entry-amount {
    font-family: var(--font-mono);
    font-weight: 600;
    text-align: right;
}

.entry-amount.positive {
    color: var(--color-emerald-600);
}

.entry-amount.negative {
    color: var(--color-slate-600);
}

.entry-total {
    border-top: 2px solid var(--color-slate-900);
    padding-top: 1rem;
    margin-top: 0.5rem;
}

.entry-total .entry-desc {
    font-weight: 700;
    color: var(--color-slate-900);
}

.entry-total .entry-amount {
    font-size: 1.125rem;
    font-weight: 700;
}

/* Services Section */
.services-section {
    padding: 6rem 4rem;
    background: var(--color-slate-50);
}

.section-header {
    max-width: 600px;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-slate-900);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-slate-200);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-slate-300);
}

.service-number {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-slate-400);
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: 1rem;
}

.service-desc {
    color: var(--color-slate-600);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.service-list li {
    color: var(--color-slate-600);
    font-size: 0.9375rem;
    padding-left: 1.5rem;
    position: relative;
}

.service-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-slate-400);
    font-weight: 600;
}

/* Stats Section */
.stats-section {
    padding: 4rem 4rem;
    background: var(--color-slate-900);
    border-top: 1px solid var(--color-slate-800);
    border-bottom: 1px solid var(--color-slate-800);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-white);
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--color-slate-400);
}

/* Approach Section */
.approach-section {
    padding: 6rem 4rem;
    background: var(--color-white);
}

.approach-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.approach-desc {
    font-size: 1.125rem;
    color: var(--color-slate-600);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.approach-features {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-item {
    display: flex;
    gap: 1.25rem;
}

.feature-icon {
    font-size: 1.75rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-slate-900);
    margin-bottom: 0.375rem;
}

.feature-text {
    font-size: 0.9375rem;
    color: var(--color-slate-600);
    line-height: 1.6;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
    padding-left: 2rem;
}

.timeline:before {
    content: "";
    position: absolute;
    left: 8px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: var(--color-slate-200);
}

.timeline-item {
    position: relative;
    display: flex;
    gap: 1.5rem;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-slate-300);
    flex-shrink: 0;
    z-index: 1;
}

.timeline-marker.active {
    border-color: var(--color-emerald-500);
    background: var(--color-emerald-500);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-slate-900);
    margin-bottom: 0.5rem;
}

.timeline-text {
    font-size: 0.9375rem;
    color: var(--color-slate-600);
    line-height: 1.6;
}

/* CTA Section */
.cta-section {
    padding: 6rem 4rem;
    background: var(--color-slate-50);
}

.cta-content {
    max-width: 720px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-slate-900);
    text-align: center;
    margin-bottom: 1rem;
}

.cta-desc {
    font-size: 1.125rem;
    color: var(--color-slate-600);
    text-align: center;
    margin-bottom: 3rem;
}

.contact-form {
    background: var(--color-white);
    border: 1px solid var(--color-slate-200);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-slate-700);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-family: var(--font-sans);
    color: var(--color-slate-900);
    background: var(--color-white);
    border: 1.5px solid var(--color-slate-300);
    border-radius: 6px;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-slate-900);
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: 1rem;
}

/* Footer */
.footer {
    padding: 3rem 4rem;
    background: var(--color-slate-900);
    border-top: 1px solid var(--color-slate-800);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.footer-tagline {
    color: var(--color-slate-400);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.footer-links a {
    color: var(--color-slate-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-divider {
    color: var(--color-slate-700);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 14, 26, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-white);
    border-radius: 12px;
    padding: 3rem;
    max-width: 480px;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--color-slate-400);
    cursor: pointer;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-slate-900);
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-slate-900);
    margin-bottom: 0.75rem;
}

.modal-text {
    font-size: 1.0625rem;
    color: var(--color-slate-600);
    line-height: 1.7;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .header-row {
        padding: 1.5rem 2rem;
    }

    .hero-section {
        padding: 4rem 2rem;
        gap: 3rem;
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .services-section,
    .approach-section,
    .cta-section {
        padding: 4rem 2rem;
    }

    .stats-section {
        padding: 3rem 2rem;
    }

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

@media (max-width: 768px) {
    .header-row {
        padding: 1rem 1.5rem;
    }

    .nav {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.875rem;
    }

    .hero-section {
        grid-template-columns: 1fr;
        padding: 3rem 1.5rem;
        gap: 2.5rem;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-desc {
        font-size: 1.0625rem;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .services-section,
    .approach-section,
    .cta-section {
        padding: 3rem 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .stats-section {
        padding: 2.5rem 1.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .approach-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 2rem 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}