:root {
    --bg: #ffffff;
    --bg-muted: #f8fafc;
    --bg-dark: #0f172a;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --surface-dark: rgba(255, 255, 255, 0.05);

    --text: #0f172a;
    --text-muted: #475569;
    --text-soft: #94a3b8;
    --text-light: #e2e8f0;
    --text-white: #ffffff;

    --border: #e2e8f0;
    --border-dark: rgba(255, 255, 255, 0.1);

    --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);

    --radius-lg: 1.5rem;
    --radius-xl: 1.75rem;

    --container: 1200px;
    --transition: 180ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

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

a {
    color: inherit;
}

.container {
    width: min(var(--container), calc(100% - 2rem));
    margin: 0 auto;
}

.section {
    padding: 5rem 0;
}

.section-muted {
    background: var(--bg-muted);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-dark {
    background: var(--bg-dark);
    color: var(--text-white);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding: 1.125rem 0;
}

.brand-block {
    min-width: 0;
}

.brand {
    display: inline-block;
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-subtitle {
    margin: 0.25rem 0 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.site-nav a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--text);
}

.hero-grid,
.split-grid {
    display: grid;
    gap: 2.5rem;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    align-items: start;
}

.eyebrow,
.card-label,
.card-label-light {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.18em;
}

.eyebrow {
    padding: 0.5rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-muted);
}

.hero h1,
.section h2 {
    margin: 0;
    letter-spacing: -0.03em;
}

.hero h1 {
    margin-top: 1rem;
    max-width: 12ch;
    font-size: clamp(2.75rem, 6vw, 4.75rem);
    line-height: 1.02;
}

.hero-text,
.section-intro p,
.lead,
.body-copy p,
.feature-card p,
.contact-block>p {
    color: var(--text-muted);
}

.hero-text {
    max-width: 42rem;
    margin: 1.5rem 0 0;
    font-size: 1.125rem;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3rem;
    padding: 0.875rem 1.25rem;
    border-radius: 1rem;
    border: 1px solid transparent;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform var(--transition), border-color var(--transition), background-color var(--transition), color var(--transition);
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--text);
    color: var(--text-white);
}

.button-primary:hover,
.button-primary:focus-visible {
    background: #1e293b;
}

.button-secondary {
    border-color: #cbd5e1;
    color: #334155;
    background: transparent;
}

.button-secondary:hover,
.button-secondary:focus-visible {
    border-color: #94a3b8;
    color: var(--text);
}

.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--surface);
    box-shadow: var(--shadow);
    padding: 2rem;
}

.signs-card {
    background: var(--surface-muted);
}

.card-label {
    color: #64748b;
}

.signs-list,
.methodology-list {
    list-style: none;
    margin: 1.5rem 0 0;
    padding: 0;
}

.signs-list li {
    color: #334155;
    margin: 0;
}

.signs-list li+li {
    margin-top: 1rem;
}

.signs-list strong {
    color: var(--text);
}

.compact-list li+li {
    margin-top: 1rem;
}

.section-intro {
    max-width: 48rem;
}

.section-intro h2,
.split-copy h2,
.contact-block h2 {
    font-size: clamp(2rem, 3.5vw, 3rem);
    line-height: 1.1;
}

.section-intro p,
.lead {
    margin-top: 1rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.three-up {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 2.5rem;
}

.feature-card h3 {
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.feature-card p {
    margin: 0.9rem 0 0;
    line-height: 1.8;
}

.body-copy {
    margin-top: 2rem;
}

.body-copy p {
    margin: 0;
    line-height: 1.9;
}

.body-copy p+p {
    margin-top: 1rem;
}

.section-dark .split-copy-dark h2,
.section-dark .split-copy-dark h3 {
    color: var(--text-white);
}

.split-copy-dark p {
    color: var(--text-light);
}

.subsection-block+.subsection-block {
    margin-top: 2rem;
}

.subsection-block h3 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.subsection-block p {
    margin: 0.85rem 0 0;
    font-size: 1.06rem;
    line-height: 1.85;
}

.methodology-card {
    background: var(--surface-dark);
    border-color: var(--border-dark);
    box-shadow: none;
}

.card-label-light {
    color: var(--text-soft);
}

.methodology-list li+li {
    margin-top: 1.2rem;
}

.methodology-list h4 {
    margin: 0;
    color: var(--text-white);
    font-size: 1rem;
    line-height: 1.35;
}

.methodology-list p {
    margin: 0.35rem 0 0;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.75;
}

.initial {
    font-weight: 800;
}

.contact-block {
    max-width: 52rem;
    text-align: center;
}

.contact-block>p {
    max-width: 40rem;
    margin: 1rem auto 0;
    font-size: 1.1rem;
    line-height: 1.8;
}

.contact-card {
    margin: 2rem auto 0;
    background: var(--surface-muted);
    max-width: 42rem;
}

.contact-email {
    margin: 0.75rem 0 0;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.contact-email a {
    text-decoration: none;
}

.contact-email a:hover,
.contact-email a:focus-visible {
    text-decoration: underline;
}

.contact-note {
    margin: 0.5rem 0 0;
    color: #64748b;
    font-size: 0.95rem;
}

@media (max-width: 980px) {

    .hero-grid,
    .split-grid {
        grid-template-columns: 1fr;
    }

    .three-up {
        grid-template-columns: 1fr;
    }

    .site-nav {
        display: none;
    }

    .header-inner {
        align-items: flex-start;
    }

    .hero h1 {
        max-width: 14ch;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 4rem 0;
    }

    .card {
        padding: 1.5rem;
    }

    .hero-text,
    .section-intro p,
    .lead,
    .subsection-block p,
    .body-copy p,
    .feature-card p,
    .contact-block>p {
        font-size: 1rem;
        line-height: 1.75;
    }

    .button {
        width: 100%;
    }

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