/* Self-hosted fonts (Fontsource, SIL OFL 1.1). Latin subset only. */
@font-face {
  font-family: "Manrope";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url("assets/fonts/manrope-latin-wght-normal.woff2") format("woff2-variations"),
       url("assets/fonts/manrope-latin-wght-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-display: swap;
  font-weight: 500;
  src: url("assets/fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* base reset (previously supplied by the artifact host) */
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; padding: 0; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
:root { color-scheme: light; }

/* Layout: alternating white and black bands on a 1200px column; the logo is outlined SVG artwork (assets/logo), text is Manrope, figures IBM Plex Mono. */
:root {
  --surface: #FFFFFF;
  --surface-alt: #F2F2F2;
  --ink: #0A0A0A;
  --ink-muted: #4A4A4A;
  --ink-subtle: #6E6E6E;
  --rule: #D6D6D6;
  --rule-strong: #0A0A0A;
  --accent: #2F8F68;
  --band: #0A0A0A;
  --band-ink: #FFFFFF;
  --band-muted: #B5B5B5;
  --band-subtle: #8C8C8C;
  --band-rule: #2E2E2E;
  --band-accent: #5FC79A;
  --font-sans: "Manrope", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --content-max: 1200px;
  --pad-block: 112px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --surface: #0A0A0A; --surface-alt: #161616; --ink: #F5F5F5; --ink-muted: #B5B5B5; --ink-subtle: #8C8C8C;
    --rule: #2A2A2A; --rule-strong: #F5F5F5; --accent: #5FC79A;
    --band: #161616; --band-ink: #FFFFFF; --band-muted: #B5B5B5; --band-subtle: #8C8C8C; --band-rule: #303030; --band-accent: #5FC79A;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  background: var(--surface); color: var(--ink);
  font-family: var(--font-sans); font-size: 18px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p, dd, li, figcaption { text-wrap: balance; }
a { color: inherit; }
a:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

.band { width: 100%; }
.band.dark { background: var(--band); color: var(--band-ink); }
.band.alt { background: var(--surface-alt); }
.wrap {
  max-width: calc(var(--content-max) + 2 * 48px); margin: 0 auto;
  padding-left: max(48px, env(safe-area-inset-left, 0px)); padding-right: max(48px, env(safe-area-inset-right, 0px));
  padding-block: var(--pad-block);
}
@media (max-width: 720px) {
  :root { --pad-block: 64px; }
  .wrap { padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
}

/* type scale */
.eyebrow { font-family: var(--font-mono); font-weight: 500; font-size: 13px; line-height: 1.3; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-muted); }
.dark .eyebrow { color: var(--band-muted); }
.display { font-weight: 800; font-size: clamp(38px, 5.6vw, 80px); line-height: 1.04; letter-spacing: -0.025em; }
.h2 { font-weight: 800; font-size: clamp(30px, 3.8vw, 52px); line-height: 1.08; letter-spacing: -0.02em; }
.h3 { font-weight: 700; font-size: clamp(20px, 1.9vw, 26px); line-height: 1.25; letter-spacing: -0.005em; }
.lede { font-size: clamp(18px, 1.6vw, 22px); line-height: 1.55; color: var(--ink-muted); max-width: 70ch; }
.dark .lede { color: var(--band-muted); }
.copy { color: var(--ink-muted); max-width: 60ch; }
.note { font-size: 15px; line-height: 1.5; color: var(--ink-subtle); max-width: 72ch; }
.dark .note { color: var(--band-subtle); }
.mono { font-family: var(--font-mono); font-weight: 500; font-variant-numeric: tabular-nums; }

/* header */
.top { border-bottom: 1px solid var(--rule); }
.top .wrap { padding-block: 20px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.logo-wordmark { display: block; width: 128px; height: auto; color: var(--ink); }
.toc { display: flex; flex-wrap: wrap; gap: 6px 22px; list-style: none; padding: 0; }
.toc a { font-family: var(--font-mono); font-weight: 500; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none; color: var(--ink-muted); padding-block: 6px; }
.toc a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
@media (max-width: 900px) { .toc { display: none; } }

/* hero */
.hero .wrap { display: grid; gap: 64px; padding-block: 104px 96px; }
.logo-lockup { display: block; width: min(600px, 100%); height: auto; color: var(--band-ink); }
.hero-copy { display: grid; gap: 28px; }
.hero .display { max-width: 1200px; text-wrap: balance; }
.hero .rule { width: 72px; height: 3px; background: var(--band-ink); }
.hero .key { font-weight: 700; font-size: clamp(18px, 1.6vw, 22px); color: var(--band-accent); }

/* section heads */
.sec { display: grid; gap: 56px; }
.head { display: grid; gap: 14px; border-top: 3px solid var(--rule-strong); padding-top: 22px; }
.head .copy { margin-top: 4px; }

/* landscape */
.landscape { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.status { list-style: none; padding: 0; display: grid; }
.status li { display: grid; grid-template-columns: 15.5rem minmax(0, 1fr); gap: 8px 32px; padding-block: 22px; border-top: 1px solid var(--rule); }
.status li:last-child { border-bottom: 1px solid var(--rule); }
.status .copy { max-width: none; }
.status .h3 { white-space: nowrap; font-size: 22px; }
.panel { background: var(--band); color: var(--band-ink); padding: 44px; display: grid; gap: 24px; }
.panel .h3 { font-size: clamp(24px, 2.4vw, 32px); font-weight: 800; letter-spacing: -0.015em; }
.panel p:last-child { color: var(--band-muted); }
@media (max-width: 900px) { .landscape { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) { .status li { grid-template-columns: minmax(0, 1fr); } .panel { padding: 28px; } }

/* ingredient */
.ingredient { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 56px; align-items: start; }
.parts { display: grid; gap: 36px; }
.part { display: grid; gap: 10px; border-top: 1px solid var(--rule); padding-top: 20px; }
.diagram { background: var(--surface-alt); padding: 36px; display: grid; gap: 18px; }
.alt .diagram { background: var(--surface); }
.diagram .node-open { fill: var(--surface); }
.diagram svg { width: 100%; height: auto; display: block; color: var(--ink); }
.diagram .labels { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; text-align: center; font-size: 14px; color: var(--ink-muted); }
.diagram .note { font-size: 14px; }
@media (max-width: 900px) { .ingredient { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .diagram { padding: 20px; } .diagram .labels { font-size: 12px; } }

/* stats */
.stat-row { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 64px; align-items: end; }
.big { font-weight: 800; font-size: clamp(104px, 17vw, 240px); line-height: 0.88; letter-spacing: -0.045em; font-variant-numeric: tabular-nums; }
.big.accent { color: var(--accent); }
.figure { display: grid; gap: 14px; }
.figure .h3 { max-width: 22ch; }
.aside { display: grid; gap: 14px; border-top: 2px solid var(--rule-strong); padding-top: 22px; }
@media (max-width: 860px) { .stat-row { grid-template-columns: minmax(0, 1fr); gap: 40px; } }

.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 64px; }
.pair .figure { border-top: 2px solid var(--rule-strong); padding-top: 22px; }
.pair .big { font-size: clamp(88px, 12vw, 180px); }
@media (max-width: 760px) { .pair { grid-template-columns: minmax(0, 1fr); gap: 48px; } }

/* advantages table */
.adv { width: 100%; display: grid; border-top: 3px solid var(--rule-strong); }
.adv-row { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr) minmax(0, 1.2fr); gap: 32px; padding-block: 22px; border-bottom: 1px solid var(--rule); }
.adv-row.th { padding-block: 16px; }
.adv-row.th span { font-family: var(--font-mono); font-weight: 500; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-muted); }
.adv-row .lab { display: none; }
.adv-row p { color: var(--ink-muted); }
.adv-row .h3 { font-size: 22px; white-space: nowrap; }
@media (max-width: 900px) {
  .adv-row.th { display: none; }
  .adv-row { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .adv-row .lab { display: block; font-family: var(--font-mono); font-weight: 500; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-subtle); margin-bottom: 2px; }
}

/* formats */
.formats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; list-style: none; padding: 0; }
.formats li { display: grid; align-content: start; gap: 10px; border-top: 2px solid var(--rule-strong); padding-top: 20px; }
.formats p { color: var(--ink-muted); }
@media (max-width: 960px) { .formats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 32px; } }
@media (max-width: 520px) { .formats { grid-template-columns: minmax(0, 1fr); } }

/* steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; list-style: none; padding: 0; }
.steps li { display: grid; align-content: start; gap: 12px; border-top: 2px solid var(--band-ink); padding-top: 20px; }
.steps .n { font-family: var(--font-mono); font-weight: 500; font-size: 28px; line-height: 1; color: var(--band-ink); font-variant-numeric: tabular-nums; }
.steps p { color: var(--band-muted); }
.dark .head { border-top-color: var(--band-ink); }
.dark .copy { color: var(--band-muted); }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 32px; } }
@media (max-width: 520px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* footer */
.foot .wrap { display: grid; gap: 40px; padding-block: 72px 48px; }
.foot-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 32px; }
.logo-foot { display: block; width: 220px; height: auto; color: var(--band-ink); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; border-top: 1px solid var(--band-rule); padding-top: 22px; }
@media (max-width: 560px) { .logo-foot { width: 160px; } }

/* logo images */
.logo-link { display: inline-block; line-height: 0; }

/* 404 */
.nf .wrap { display: grid; gap: 40px; min-height: 100vh; min-height: 100svh; align-content: center; }
.nf .h2 { max-width: 18ch; }
.nf .back { font-family: var(--font-mono); font-weight: 500; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--band-ink); text-decoration: underline; text-underline-offset: 5px; }