:root {
    color-scheme: dark;
    --bg: #0b0f14;
    --bg-soft: #101720;
    --panel: #151e29;
    --panel-strong: #1a2633;
    --text: #f2f5f8;
    --muted: #a3afbd;
    --line: #293746;
    --accent: #77d5b5;
    --accent-strong: #a2f1d5;
    --blue: #86bfff;
    --danger: #ffbc90;
    --shadow: 0 22px 70px rgba(0, 0, 0, 0.24);
    --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    --content: 1120px;
    --reading: 760px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font-sans); font-size: 1rem; line-height: 1.65; }
a { color: var(--accent-strong); text-underline-offset: 0.18em; }
a:hover { color: #fff; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
img { max-width: 100%; }
code { font-family: var(--font-mono); }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--accent); color: #062019; padding: 0.7rem 1rem; border-radius: 0.5rem; font-weight: 800; }
.skip-link:focus { top: 1rem; }
.container { width: min(calc(100% - 2rem), var(--content)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(41, 55, 70, 0.75); background: rgba(11, 15, 20, 0.92); backdrop-filter: blur(18px); }
.header-inner { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.logo { display: inline-flex; align-items: center; gap: 0.7rem; color: var(--text); font-weight: 800; text-decoration: none; letter-spacing: -0.02em; white-space: nowrap; }
.logo-mark { display: grid; place-items: center; width: 2rem; height: 2rem; border: 1px solid var(--accent); border-radius: 0.55rem; color: var(--accent); font-family: var(--font-mono); font-size: 0.9rem; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.35rem 1rem; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.88rem; }
.nav a:hover { color: var(--text); }

.hero, .page-hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: radial-gradient(circle at 85% 20%, rgba(119, 213, 181, 0.12), transparent 36%), linear-gradient(180deg, #0d131b, var(--bg)); }
.hero { padding: clamp(4.5rem, 9vw, 8.5rem) 0; }
.page-hero { padding: clamp(4rem, 8vw, 7rem) 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr); gap: clamp(2.5rem, 6vw, 6rem); align-items: center; }
.eyebrow { margin: 0 0 0.8rem; color: var(--accent); font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -0.035em; }
h1 { max-width: 920px; margin: 0; font-size: clamp(2.55rem, 6vw, 5.8rem); }
.page-hero h1 { max-width: 900px; font-size: clamp(2.45rem, 5vw, 4.8rem); }
h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { margin: 0 0 0.65rem; font-size: 1.22rem; }
.hero-lead { max-width: 800px; margin: 1.4rem 0 0; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.35rem); }
.status-line { display: flex; align-items: center; gap: 0.7rem; margin: 1.5rem 0 0; color: var(--muted); font-size: 0.92rem; }
.status-line strong { color: var(--text); }
.status-dot { width: 0.65rem; height: 0.65rem; border-radius: 999px; background: var(--accent); box-shadow: 0 0 0 5px rgba(119, 213, 181, 0.12); }
.status-badge { display: inline-flex; margin-top: 1.5rem; padding: 0.55rem 0.85rem; border: 1px solid rgba(119, 213, 181, 0.35); border-radius: 999px; color: var(--accent-strong); background: rgba(119, 213, 181, 0.08); font-family: var(--font-mono); font-size: 0.78rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.75rem; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 2.9rem; padding: 0.7rem 1.1rem; border: 1px solid transparent; border-radius: 0.65rem; text-decoration: none; font-weight: 750; }
.btn-primary { background: var(--accent); color: #062019; }
.btn-primary:hover { background: var(--accent-strong); color: #062019; }
.btn-secondary { border-color: var(--line); background: var(--panel); color: var(--text); }
.btn-secondary:hover { border-color: var(--accent); color: var(--text); }
.hero-panel { padding: 1.5rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(21, 30, 41, 0.8); box-shadow: var(--shadow); }
.panel-label { margin: 0 0 1rem; color: var(--muted); font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.14em; }
.flow-list { list-style: none; margin: 0; padding: 0; }
.flow-list li { display: grid; grid-template-columns: 2.25rem 1fr; gap: 0 0.75rem; padding: 0.9rem 0; border-top: 1px solid var(--line); }
.flow-list li:first-child { border-top: 0; padding-top: 0; }
.flow-list span { grid-row: span 2; color: var(--accent); font-family: var(--font-mono); font-size: 0.75rem; }
.flow-list strong { font-size: 0.95rem; }
.flow-list small { color: var(--muted); line-height: 1.45; }

.section { padding: clamp(4rem, 8vw, 7rem) 0; border-bottom: 1px solid var(--line); }
.section-alt { background: var(--bg-soft); }
.section-heading { max-width: 780px; margin-bottom: 2rem; }
.section-heading > p:last-child { color: var(--muted); font-size: 1.08rem; }
.section-link { margin: 1.5rem 0 0; }
.card-grid { display: grid; gap: 1rem; }
.four-up { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 1.45rem; border: 1px solid var(--line); border-radius: 0.9rem; background: linear-gradient(145deg, var(--panel), rgba(21, 30, 41, 0.55)); }
.card p { margin: 0; color: var(--muted); }
.card-number { margin: 0 0 1rem !important; color: var(--accent) !important; font-family: var(--font-mono); font-size: 0.78rem; }
.evidence-list { display: grid; gap: 0.65rem; }
.evidence-item { display: grid; grid-template-columns: 0.65fr 1.5fr auto; gap: 1rem; align-items: center; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: 0.75rem; background: var(--panel); text-decoration: none; }
.evidence-item span { color: var(--accent); font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.1em; }
.evidence-item strong { color: var(--text); font-size: 0.95rem; }
.evidence-item em { color: var(--muted); font-style: normal; font-size: 0.85rem; }
.evidence-item:hover { border-color: var(--accent); }
.architecture-strip { display: grid; grid-template-columns: repeat(4, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: 0.9rem; }
.architecture-strip div { min-height: 8rem; padding: 1.25rem; border-left: 1px solid var(--line); background: var(--panel); }
.architecture-strip div:first-child { border-left: 0; }
.architecture-strip span { display: block; margin-bottom: 1.5rem; color: var(--accent); font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; }
.architecture-strip strong { display: block; font-size: 0.94rem; }
.two-column { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.prose { color: var(--muted); font-size: 1.05rem; }
.prose p:first-child { margin-top: 0; }
.contact-panel { display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 2rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--panel); }
.contact-panel h2 { max-width: 760px; font-size: clamp(1.8rem, 3vw, 2.8rem); }
.contact-panel p:last-child { color: var(--muted); }
.contact-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; }
.contact-actions > a:not(.btn) { color: var(--muted); font-size: 0.86rem; }
.comparison-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
ul { padding-left: 1.2rem; }
.check-list, .plain-list { margin: 0; color: var(--muted); }
.check-list li, .plain-list li { margin: 0.55rem 0; }
.check-list li::marker { color: var(--accent); }
.tag-grid { display: flex; flex-wrap: wrap; gap: 0.65rem; }
.tag-grid span { padding: 0.55rem 0.75rem; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); color: var(--muted); font-size: 0.86rem; }
.note { margin-top: 1.5rem; padding: 1rem; border-left: 3px solid var(--danger); background: rgba(255, 188, 144, 0.06); color: var(--muted); }
.evidence-sections { display: grid; gap: 1rem; }
.evidence-block { display: grid; grid-template-columns: 3rem 1fr; gap: 1.25rem; padding: 1.5rem; border: 1px solid var(--line); border-radius: 0.9rem; background: var(--panel); }
.evidence-block h2 { font-size: 1.5rem; }
.evidence-block p { color: var(--muted); }
.prose-wide { max-width: var(--reading); }
.prose-wide h2 { margin: 2.7rem 0 0.8rem; font-size: 1.65rem; }
.prose-wide h2:first-child { margin-top: 0; }
.prose-wide p, .prose-wide li { color: var(--muted); }
.pitch-hero { background: radial-gradient(circle at 20% 10%, rgba(134, 191, 255, 0.14), transparent 40%), linear-gradient(180deg, #0d131b, var(--bg)); }

.site-footer { padding: 2.4rem 0; background: #080b0f; }
.footer-inner { display: grid; gap: 0.25rem; }
.footer-inner p { margin: 0; }
.footer-copy { font-weight: 750; }
.footer-legal { color: var(--muted); font-size: 0.82rem; }
.footer-legal a { color: var(--muted); }

@media (max-width: 980px) {
    .header-inner { align-items: flex-start; padding: 1rem 0; }
    .nav { max-width: 580px; }
    .hero-grid, .two-column { grid-template-columns: 1fr; }
    .four-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
    .header-inner { flex-direction: column; gap: 0.75rem; }
    .nav { justify-content: flex-start; }
    .hero { padding-top: 4rem; }
    .four-up, .two-up, .comparison-grid { grid-template-columns: 1fr; }
    .architecture-strip { grid-template-columns: 1fr 1fr; }
    .architecture-strip div:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
    .architecture-strip div:nth-child(4) { border-top: 1px solid var(--line); }
    .evidence-item { grid-template-columns: 1fr; gap: 0.25rem; }
    .contact-panel { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 440px) {
    .container { width: min(calc(100% - 1.25rem), var(--content)); }
    .architecture-strip { grid-template-columns: 1fr; }
    .architecture-strip div { border-left: 0; border-top: 1px solid var(--line); }
    .architecture-strip div:first-child { border-top: 0; }
    .evidence-block { grid-template-columns: 1fr; }
}