:root {
  --paper: oklch(0.96 0 0);
  --paper-deep: oklch(0.91 0 0);
  --ink: oklch(0.15 0 0);
  --muted: oklch(0.46 0 0);
  --line: oklch(0.76 0 0);
  --font-display: "Archivo Black", Arial, sans-serif;
  --font-body: "Libre Franklin", Arial, sans-serif;
  --pad: clamp(1.25rem, 4.4vw, 5rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); }
a { color: inherit; }
img { max-width: 100%; }
button { font: inherit; }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  color: oklch(0.96 0 0);
  background: var(--ink);
  border-bottom: 1px solid oklch(0.94 0 0 / 0.2);
}

.brand { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.11em; text-transform: uppercase; text-decoration: none; }
.brand span { color: inherit; }
.header-maker { font-size: 0.68rem; font-weight: 600; letter-spacing: 0.08em; text-decoration: none; }
.header-maker:hover { color: oklch(0.72 0 0); }

.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden; color: oklch(0.97 0 0); }
.hero-photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.12) brightness(0.74); transform: scale(1.015); animation: settle 1.8s cubic-bezier(.16,1,.3,1) both; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, oklch(0.1 0 0 / 0.92) 0%, oklch(0.1 0 0 / 0.62) 45%, oklch(0.1 0 0 / 0.08) 82%), linear-gradient(0deg, oklch(0.1 0 0 / 0.64), transparent 45%); }
.hero-copy { position: relative; z-index: 2; width: 100%; padding: clamp(8rem, 16vh, 12rem) var(--pad) clamp(3rem, 7vh, 6.5rem); }
h1, h2, h3, p { text-wrap: pretty; }
h1 { max-width: 1050px; margin: 0 0 1.6rem; font-family: var(--font-display); font-size: clamp(4rem, 10.2vw, 10.5rem); line-height: 0.82; letter-spacing: -0.075em; }
.hero-subtitle { margin: 0 0 2.5rem; font-size: clamp(1.2rem, 2vw, 1.8rem); font-weight: 500; letter-spacing: -0.035em; }
.text-link { display: inline-flex; gap: 0.65rem; padding-bottom: 0.35rem; border-bottom: 1px solid currentColor; font-size: 0.78rem; font-weight: 700; text-decoration: none; }
.text-link:hover { color: var(--muted); }
.light { color: oklch(0.97 0 0); }

.section-pad { padding: clamp(6rem, 12vw, 12rem) var(--pad); }
.premise { min-height: 72vh; display: flex; align-items: center; }
.statement { max-width: 1150px; font-size: clamp(2.6rem, 6.5vw, 7.2rem); font-weight: 600; line-height: 0.98; letter-spacing: -0.065em; }
.statement p { margin: 0; }
.statement p + p { margin-top: 0.85em; color: var(--ink); }
.statement .platform-promise { max-width: 760px; margin-left: auto; font-size: clamp(1.25rem, 2.4vw, 2.2rem); line-height: 1.18; letter-spacing: -0.04em; }

.work h2 { margin: 0; font-family: var(--font-display); font-size: clamp(3rem, 7vw, 7.5rem); line-height: 0.9; letter-spacing: -0.065em; }
.math-steps { margin: clamp(6rem, 10vw, 10rem) 0 0; padding: 0; list-style: none; border-top: 1px solid oklch(0.96 0 0 / 0.28); }
.math-steps li { display: grid; grid-template-columns: 1fr 4fr; gap: 3rem; align-items: baseline; padding: 1.6rem 0; border-bottom: 1px solid oklch(0.96 0 0 / 0.28); }
.math-steps span { color: var(--paper); font-size: 0.68rem; font-weight: 700; }
.math-steps p { margin: 0; font-size: clamp(1.2rem, 2.3vw, 2rem); letter-spacing: -0.03em; }

.faq { background: var(--ink); color: var(--paper); }
.faq-row { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr); gap: clamp(2rem, 7vw, 8rem); align-items: baseline; padding: clamp(3rem, 6vw, 5.5rem) 0; border-bottom: 1px solid oklch(0.96 0 0 / 0.24); }
.faq-row:first-child { border-top: 1px solid oklch(0.96 0 0 / 0.24); }
.faq-row h2 { margin: 0; font-family: var(--font-display); font-size: clamp(2.5rem, 5.8vw, 6.2rem); line-height: 0.92; letter-spacing: -0.065em; }
.faq-row p { max-width: 520px; margin: 0; font-size: clamp(1rem, 1.5vw, 1.3rem); line-height: 1.55; }
.faq-row--big { align-items: end; min-height: 64vh; }
.faq-row--big p.platform-promise { max-width: 760px; font-size: clamp(1.25rem, 2.4vw, 2.2rem); font-weight: 600; line-height: 1.18; letter-spacing: -0.04em; color: var(--paper); }
.envelope { position: relative; isolation: isolate; margin-inline: calc(-1 * var(--pad)); padding: clamp(7rem, 12vw, 12rem) var(--pad); overflow: hidden; }
.envelope::after { content: ""; position: absolute; z-index: -1; inset: 0; background: oklch(0.05 0 0 / 0.81); }
.envelope-media { position: absolute; z-index: -2; inset: 0; }
.envelope-media img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.28) brightness(0.58); }
.envelope-heading { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr); gap: clamp(3rem, 8vw, 9rem); align-items: start; padding-bottom: clamp(4rem, 7vw, 7rem); border-bottom: 1px solid oklch(0.96 0 0 / 0.24); }
.envelope-heading h2 { margin: 0; font-family: var(--font-display); font-size: clamp(2.5rem, 5.8vw, 6.2rem); line-height: 0.92; letter-spacing: -0.065em; }
.envelope-heading > p { max-width: 520px; margin: 0; font-size: clamp(1rem, 1.5vw, 1.3rem); line-height: 1.55; }
.envelope-heading .envelope-definition { grid-column: 2; margin-top: 1.4rem; color: oklch(0.72 0 0); font-size: 0.78rem; }
.envelope figure { margin: clamp(4rem, 7vw, 7rem) 0 0; padding: clamp(1.5rem, 3vw, 3rem); background: oklch(0.08 0 0 / 0.9); border: 1px solid oklch(0.96 0 0 / 0.24); }
.envelope-plot { position: relative; padding: 3.5rem 0 1.6rem; overflow: hidden; border-bottom: 1px solid oklch(0.96 0 0 / 0.24); }
.envelope-plot svg { display: block; width: 100%; height: auto; overflow: visible; }
.axis-y, .axis-x { margin: 0; color: oklch(0.72 0 0); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.07em; text-transform: uppercase; }
.axis-y { position: absolute; top: 1.2rem; left: 0; }
.axis-x { text-align: right; }
.chart-grid line { stroke: oklch(0.96 0 0 / 0.16); stroke-width: 1; }
.chart-grid .parity-line { stroke: var(--paper); stroke-width: 2; stroke-dasharray: 7 7; }
.crossover-band { fill: oklch(0.96 0 0 / 0.09); }
.chart-labels, .chart-points { fill: var(--paper); font-family: var(--font-body); font-size: 18px; }
.chart-labels text { text-anchor: end; fill: oklch(0.72 0 0); font-size: 15px; }
.chart-points circle { fill: var(--paper); }
.chart-series { fill: none; stroke: var(--paper); stroke-width: 2; }
.chart-points text { text-anchor: middle; fill: oklch(0.72 0 0); font-size: 15px; font-weight: 500; }
.envelope-data { width: 100%; margin-top: 2rem; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.envelope-data caption { margin-bottom: 0.8rem; color: oklch(0.72 0 0); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.07em; text-align: left; text-transform: uppercase; }
.envelope-data thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.envelope-data tbody { display: grid; grid-template-columns: repeat(7, 1fr); }
.envelope-data tr { display: grid; gap: 0.25rem; padding: 0.85rem 0; border-top: 1px solid oklch(0.96 0 0 / 0.24); }
.envelope-data td { padding: 0; font-size: 0.75rem; }
.envelope-data td:last-child { font-size: clamp(1.1rem, 2vw, 1.6rem); font-weight: 700; }
.crossover-note { margin: 1.5rem 0 0; font-size: clamp(1rem, 1.5vw, 1.25rem); font-weight: 700; }
.envelope figcaption { max-width: 900px; margin: 1.5rem 0 0 auto; color: oklch(0.72 0 0); font-size: 0.72rem; line-height: 1.6; }
.enterprise-product { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr); gap: clamp(3rem, 8vw, 10rem); align-items: start; }
.enterprise-product h2 { margin: 0; font-family: var(--font-display); font-size: clamp(4rem, 9vw, 9rem); line-height: 0.85; letter-spacing: -0.075em; }
.enterprise-title { position: sticky; top: 8rem; }
.platform-icon { width: clamp(2.5rem, 4vw, 4rem); height: auto; margin-bottom: 2rem; }
.enterprise-copy { padding-top: 0.5rem; }
.enterprise-copy p { max-width: 520px; font-size: clamp(1rem, 1.5vw, 1.25rem); line-height: 1.55; }
.enterprise-copy .product-lead { margin-top: 0; font-size: clamp(1.45rem, 2.3vw, 2.25rem); font-weight: 600; line-height: 1.18; letter-spacing: -0.045em; }
.enterprise-copy .text-link { margin-top: 1.4rem; }
.ubuntu-benchmarks { margin-top: clamp(5rem, 9vw, 9rem); }
.ubuntu-benchmarks dl { margin: 0; border-top: 1px solid var(--ink); }
.ubuntu-benchmarks dl div { display: grid; grid-template-columns: 1fr 1.35fr; gap: 2rem; align-items: baseline; padding: 1.3rem 0; border-bottom: 1px solid var(--line); }
.ubuntu-benchmarks dt { font-family: var(--font-display); font-size: clamp(2.4rem, 4.2vw, 4.5rem); letter-spacing: -0.065em; }
.ubuntu-benchmarks dd { margin: 0; font-size: 0.78rem; line-height: 1.4; }
.benchmark-context { margin-top: 1.25rem; color: var(--muted); font-size: 0.7rem !important; line-height: 1.55 !important; }
.delivery-paths { margin-top: clamp(5rem, 9vw, 9rem); }
.delivery-label { margin-bottom: 1rem; color: var(--muted); font-size: 0.68rem !important; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }
.delivery-paths ul { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.delivery-paths li { display: flex; justify-content: space-between; gap: 2rem; padding: 1.15rem 0; border-bottom: 1px solid var(--line); font-size: 0.78rem; }
.delivery-paths li span:first-child { font-weight: 700; }
.delivery-paths li span:last-child { color: var(--muted); text-align: right; }
.studio-link { display: grid; grid-template-columns: 1.4rem 1fr auto; gap: 1rem; align-items: center; margin-top: 3rem; padding: 1.5rem 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); text-decoration: none; }
.studio-link img { width: 1.4rem; }
.studio-link span { font-size: 0.78rem; line-height: 1.5; }
.studio-link:hover { color: var(--muted); }

.evidence-intro { max-width: 1150px; margin-bottom: clamp(5rem, 10vw, 10rem); }
.product-list { border-top: 1px solid var(--line); }
.product-row { display: grid; grid-template-columns: 0.5fr 1.3fr 2.2fr 1fr; gap: 2rem; align-items: baseline; padding: 2rem 0; border-bottom: 1px solid var(--line); }
.product-row p { margin: 0; }
.product-number, .product-state { color: var(--muted); font-size: 0.64rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.product-row h3 { margin: 0; font-size: clamp(1.4rem, 2.6vw, 2.4rem); letter-spacing: -0.045em; }
.product-row > p:nth-child(3) { max-width: 520px; font-size: clamp(1rem, 1.5vw, 1.25rem); line-height: 1.45; }

.evidence { background: var(--paper-deep); }
.evidence h2 { font-size: clamp(2.8rem, 6.3vw, 6.6rem); }
.evidence-ledger { border-top: 1px solid var(--ink); }
.ledger-row { display: grid; grid-template-columns: 1fr 1.3fr 1.6fr; gap: 2rem; align-items: center; padding: 2.3rem 0; border-bottom: 1px solid var(--line); }
.ledger-row p { margin: 0; }
.ledger-row > p:first-child { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.ratio { color: var(--ink); font-family: var(--font-display); font-size: clamp(3rem, 7vw, 7rem); letter-spacing: -0.07em; }
.loss .ratio { color: var(--ink); }
.ledger-row > p:last-child { font-size: clamp(1rem, 1.7vw, 1.3rem); }
.conditions { max-width: 960px; margin: 2rem 0 0 auto; color: var(--muted); font-size: 0.73rem; line-height: 1.6; }
.conditions summary { width: max-content; cursor: pointer; color: var(--ink); font-weight: 700; text-underline-offset: 4px; }
.conditions p { margin: 1rem 0 0; }
.implementations { margin: clamp(5rem, 9vw, 9rem) 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: clamp(0.9rem, 1.2vw, 1.05rem); }

.work { min-height: 95vh; display: grid; grid-template-columns: 1.1fr 0.9fr; background: var(--ink); color: var(--paper); }
.work-statement { position: relative; isolation: isolate; display: flex; align-items: flex-end; min-height: 700px; overflow: hidden; padding: clamp(4rem, 8vw, 9rem) var(--pad); color: var(--paper); }
.work-statement::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(0deg, oklch(0.08 0 0 / 0.86), oklch(0.08 0 0 / 0.12) 75%); }
.work-statement img { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.15) brightness(0.68); }
.work-statement p { margin: 0; font-family: var(--font-display); font-size: clamp(3.5rem, 7vw, 7.8rem); line-height: 0.86; letter-spacing: -0.07em; }
.work-copy { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: clamp(4rem, 7vw, 8rem); }
.work h2 { margin: 0 0 2.2rem; }
.work-copy > p { max-width: 540px; margin: 0 0 2.5rem; font-size: clamp(1.1rem, 1.8vw, 1.45rem); line-height: 1.5; }
.contact-form { width: 100%; margin-top: 3rem; padding-top: 3rem; border-top: 1px solid oklch(0.96 0 0 / 0.24); }
.contact-form label { display: grid; gap: 0.65rem; margin-bottom: 1.5rem; color: oklch(0.72 0 0); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.contact-form input, .contact-form textarea { width: 100%; padding: 0.9rem 0; border: 0; border-bottom: 1px solid oklch(0.96 0 0 / 0.34); border-radius: 0; outline: 0; background: transparent; color: var(--paper); font: 400 1rem/1.4 var(--font-body); resize: vertical; }
.contact-form input:focus, .contact-form textarea:focus { border-bottom-color: var(--paper); }
.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.cta-button { display: inline-block; padding: 1rem 2rem; border: 0; background: var(--paper); color: var(--ink); font-size: 0.78rem; font-weight: 700; text-decoration: none; letter-spacing: 0.02em; cursor: pointer; }
.cta-button:hover { background: oklch(0.82 0 0); }
.contact-fine { margin: 1.2rem 0 0; color: oklch(0.56 0 0); font-size: 0.72rem; }
.contact-fine a { text-underline-offset: 3px; }
.mobile-fit-link { display: none; }

.closing { min-height: 72vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.closing h2 { margin: 1.3rem 0 3rem; font-size: clamp(3.6rem, 9vw, 9.5rem); }
.button-link { display: inline-block; padding: 1rem 1.35rem; background: var(--ink); color: var(--paper); font-size: 0.75rem; font-weight: 700; text-decoration: none; }
.button-link:hover { background: var(--paper-deep); color: var(--ink); }

.site-footer { padding: 3rem var(--pad); background: var(--ink); color: oklch(0.76 0 0); font-size: 0.64rem; line-height: 1.55; }
.footer-brand { display: flex; justify-content: space-between; padding-bottom: 2rem; border-bottom: 1px solid oklch(0.96 0 0 / 0.22); color: var(--paper); font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; }
.footer-brand a { text-decoration: none; }
.footer-brand a:hover { color: oklch(0.72 0 0); }
.footer-map { display: grid; grid-template-columns: repeat(5, 1fr); gap: 2rem; padding: 2.5rem 0; border-bottom: 1px solid oklch(0.96 0 0 / 0.22); }
.footer-map h3 { margin: 0 0 0.8rem; color: var(--paper); font-size: 0.64rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.footer-map ul { margin: 0; padding: 0; list-style: none; }
.footer-map li { padding: 0.3rem 0; }
.footer-map a { text-decoration: none; }
.footer-map a:hover { color: var(--paper); }
.social-links { display: flex; gap: 1.4rem; padding: 2rem 0 0; }
.social-links a { display: inline-flex; color: var(--paper); }
.social-links img { width: 1.25rem; height: 1.25rem; filter: invert(1); }
.footer-colophon { display: flex; flex-wrap: wrap; gap: 1rem 2rem; padding: 2rem 0 0; border-top: 1px solid oklch(0.96 0 0 / 0.22); margin-top: 2rem; }
.copyright-link { display: inline-block; margin-top: 1.5rem; color: oklch(0.56 0 0); font-weight: 700; letter-spacing: 0.06em; text-decoration: none; text-transform: uppercase; }
.copyright-link:hover { color: var(--paper); }
.legal-page { min-height: 100vh; background: var(--paper); }
.legal-main { padding: clamp(9rem, 16vw, 14rem) var(--pad) clamp(5rem, 10vw, 9rem); }
.legal-main h1 { max-width: none; color: var(--ink); }
.source-list { margin: clamp(4rem, 8vw, 8rem) 0 0; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.source-list li { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.source-list a { font-weight: 700; text-underline-offset: 4px; }
.source-list span { color: var(--muted); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 900ms cubic-bezier(.16,1,.3,1), transform 900ms cubic-bezier(.16,1,.3,1); }
.reveal.visible { opacity: 1; transform: none; }
*:focus-visible { outline: 3px solid currentColor; outline-offset: 4px; }

@keyframes settle { from { transform: scale(1.06); opacity: 0.7; } to { transform: scale(1.015); opacity: 1; } }

@media (max-width: 820px) {
  h1 { font-size: clamp(4rem, 17vw, 7rem); }
  .premise { min-height: auto; }
  .equation-wrap { margin-left: 0; }
  .equation { font-size: clamp(1.7rem, 7.5vw, 3.2rem); }
  .math-steps li { grid-template-columns: 48px 1fr; gap: 1rem; }
  .faq-row { grid-template-columns: 1fr; }
  .envelope-heading { grid-template-columns: 1fr; }
  .envelope-heading .envelope-definition { grid-column: auto; margin-top: 0; }
  .envelope-plot { display: none; }
  .envelope-data { margin-top: 3rem; }
  .envelope-data tbody { display: block; }
  .envelope-data tr { position: relative; grid-template-columns: 3.5rem 1fr; align-items: center; min-height: 3.6rem; overflow: hidden; }
  .envelope-data tr::after { content: ""; position: absolute; z-index: 0; left: 3.5rem; bottom: 0.6rem; width: var(--bar); height: 2px; background: var(--paper); }
  .envelope-data tr:nth-child(1) { --bar: calc(100% - 3.5rem); }
  .envelope-data tr:nth-child(2) { --bar: 84%; }
  .envelope-data tr:nth-child(3) { --bar: 64%; }
  .envelope-data tr:nth-child(4) { --bar: 48%; }
  .envelope-data tr:nth-child(5) { --bar: 35%; }
  .envelope-data tr:nth-child(6) { --bar: 30%; }
  .envelope-data tr:nth-child(7) { --bar: 27%; }
  .envelope-data td { position: relative; z-index: 1; }
  .envelope-data td:last-child { text-align: right; }
  .enterprise-product { grid-template-columns: 1fr; }
  .enterprise-title { position: static; }
  .product-row { grid-template-columns: 48px 1fr; }
  .product-row > p:nth-child(3), .product-state { grid-column: 2; }
  .ledger-row { grid-template-columns: 1fr 1.2fr; }
  .ledger-row > p:last-child { grid-column: 2; }
  .work { grid-template-columns: 1fr; }
  .work-statement { min-height: 72svh; }
  .field-pair { grid-template-columns: 1fr; gap: 0; }
  .mobile-fit-link { display: inline-flex; }
  .footer-map { grid-template-columns: 1fr 1fr; }
  .contact-form { margin-top: 2rem; padding-top: 2rem; }
  .source-list li { grid-template-columns: 1fr; gap: 0.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}