/* LEiO — leio.ch. Fonts are self-hosted (SIL Open Font License); no requests leave leio.ch except links people click. */
@font-face { font-family: "Newsreader"; src: url("fonts/newsreader-latin-standard-normal.woff2") format("woff2"); font-weight: 200 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Hanken Grotesk"; src: url("fonts/hanken-grotesk-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Hanken Grotesk"; src: url("fonts/hanken-grotesk-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Hanken Grotesk"; src: url("fonts/hanken-grotesk-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --ground: #ffffff; --surface: #f6f7fc; --ink: #0b1033; --ink-muted: #4a5280; --line: #e3e6f3;
  --leman: #4b3fd8; --on-leman: #ffffff; --seal: #c9922e; --seal-ink: #8a5f12;
  --on-deep: #ffffff; --on-deep-muted: #dde3ff;
  --grad-a: #6a4cff; --grad-b: #2f6bff; --glow-a: rgba(106,76,255,0.16); --glow-b: rgba(35,201,212,0.14);
  --font-display: "Newsreader", Georgia, "Times New Roman", serif;
  --font-sans: "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
  --space-1: 4px; --space-2: 8px; --space-3: 16px; --space-4: 24px; --space-5: 56px; --space-6: 96px; --space-7: 168px;
  --radius-s: 2px; --radius-m: 10px; --radius-full: 999px;
  --measure: 62ch;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--ground); color: var(--ink); font: 400 17px/29px var(--font-sans); -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
.wrap { max-width: 1160px; margin: 0 auto; padding-inline: max(20px, 6vw); }
a { color: var(--leman); text-underline-offset: 3px; }
h1, h2, h3 { text-wrap: balance; margin: 0; }
p { margin: 0; }
.label { font: 500 12px/16px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-muted); }
.ref { font: 400 13px/20px var(--font-mono); color: var(--ink-muted); }
a.ref { text-decoration: none; }
a.ref:hover { color: var(--leman); }
:focus-visible { outline: 2px solid var(--leman); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: var(--radius-s); z-index: 20; }
.skip:focus { left: 8px; }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,0.92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: 20px; }
.brand { display: flex; align-items: center; color: var(--ink); text-decoration: none; }
.brand svg { height: 30px; width: auto; display: block; }
.wm-letter { fill: var(--ink); } .wm-ring { stroke: var(--ink); } .wm-frame { stroke: var(--grad-a); } .wm-sig { fill: var(--seal); }
nav ul { display: flex; gap: 36px; list-style: none; margin: 0; padding: 0; }
nav a { color: var(--ink-muted); text-decoration: none; font-weight: 500; font-size: 15px; }
nav a:hover { color: var(--ink); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 11px 22px; border-radius: var(--radius-full); font: 600 15px/20px var(--font-sans); text-decoration: none; cursor: pointer; border: 1px solid transparent; white-space: nowrap; }
.btn-primary { background: linear-gradient(90deg, var(--grad-a), var(--grad-b)); color: var(--on-leman); box-shadow: 0 8px 28px -10px var(--glow-a); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-secondary:hover { background: var(--surface); }
.hdr-cta .short { display: none; }
@media (max-width: 1180px) { nav ul { gap: 22px; } nav a { font-size: 14px; } }
@media (max-width: 1000px) { nav { display: none; } }
@media (max-width: 480px) { .hdr-cta .long { display: none; } .hdr-cta .short { display: inline; } .brand svg { height: 26px; } }

/* Hero */
.hero { padding-block: var(--space-6) var(--space-7); overflow-x: clip; background: radial-gradient(55% 75% at 88% 8%, var(--glow-a), transparent 62%), radial-gradient(45% 60% at 4% 96%, var(--glow-b), transparent 60%), var(--ground); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 72px; align-items: center; }
.hero-copy { display: flex; flex-direction: column; gap: 32px; min-width: 0; }
.status { display: inline-flex; align-self: flex-start; align-items: center; gap: var(--space-2); padding: 6px 10px; border: 1px solid var(--line); border-radius: var(--radius-s); background: var(--surface); }
.status .ring { width: 8px; height: 8px; border-radius: var(--radius-full); border: 2px solid var(--leman); flex: none; }
.status .label { color: var(--leman); }
.hero h1 { font-family: var(--font-display); font-weight: 500; font-size: clamp(40px, 4.3vw, 62px); line-height: 1.06; letter-spacing: -0.015em; }
.hero h1 .ln { display: inline-block; white-space: nowrap; }
.hero h1 .ln + .ln { background: linear-gradient(90deg, #5b3fff, #1d8fc4); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 19px; line-height: 32px; color: var(--ink-muted); max-width: 30em; }
.lead strong { color: var(--ink); font-weight: 600; }
.ctas { display: flex; flex-wrap: wrap; gap: var(--space-3); padding-top: var(--space-2); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: var(--space-5); } .hero { padding-block: var(--space-5) var(--space-6); } .demo::before { inset: -16px 0 auto auto; } }

/* Sign-off demo card */
.demo { position: relative; min-width: 0; }
.demo::before { content: ""; position: absolute; inset: -24px -24px auto auto; width: 72%; height: 78%; background-image: radial-gradient(circle, var(--line) 2px, transparent 2.5px); background-size: 24px 24px; z-index: 0; }
.card { position: relative; z-index: 1; box-shadow: 0 30px 80px -24px rgba(75,63,216,0.28); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-m); padding: 36px; display: flex; flex-direction: column; gap: 22px; }
.card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-3); flex-wrap: wrap; }
.card h3 { font: 600 20px/26px var(--font-sans); }
.card .meta { display: grid; grid-template-columns: auto 1fr; gap: 2px var(--space-3); margin: 0; }
.card .meta dt { font: 500 12px/20px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-muted); }
.card .meta dd { margin: 0; font: 400 13px/20px var(--font-mono); color: var(--ink); }
.checks { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.checks li { display: flex; gap: var(--space-3); justify-content: space-between; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 15px; line-height: 22px; }
.checks .tag { font: 500 11px/16px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-muted); white-space: nowrap; padding-top: 3px; }
.checks .tag.gap { color: var(--ink); }
.checks .tag.gap::before { content: "!"; display: inline-block; width: 14px; height: 14px; margin-right: 6px; border: 1.5px solid var(--ink); border-radius: var(--radius-full); text-align: center; font-size: 9px; line-height: 11px; vertical-align: 1px; }
.stamp { display: inline-flex; align-items: center; gap: var(--space-2); padding: 6px 10px; background: var(--ground); border: 1px solid var(--line); border-radius: var(--radius-s); font: 500 12px/16px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; white-space: nowrap; transition: color .25s ease; }
.stamp .dot { width: 8px; height: 8px; border-radius: var(--radius-full); border: 1.5px solid currentColor; transition: background .25s ease, transform .35s cubic-bezier(.3,1.6,.5,1); }
.stamp[data-state="draft"] { color: var(--ink-muted); }
.stamp[data-state="review"] { color: var(--leman); }
.stamp[data-state="review"] .dot { border-width: 2px; }
.stamp[data-state="signed"] { color: var(--seal-ink); }
.stamp[data-state="signed"] .dot { background: var(--seal); border-color: var(--seal); transform: scale(1.25); }
.log { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.log li { font: 400 12.5px/18px var(--font-mono); color: var(--ink-muted); }
.log li b { font-weight: 500; color: var(--ink); }
.log li.signed b { color: var(--seal-ink); }
.card-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.card-actions .btn { min-height: 40px; padding: 9px 16px; font-size: 14px; }
.reset { background: none; border: 0; color: var(--ink-muted); font: 500 13px/20px var(--font-sans); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; padding: 4px; }
.caption { font: 400 12px/18px var(--font-mono); color: var(--ink-muted); margin-top: 10px; }

/* Sections */
section.block { padding-block: var(--space-7); border-top: 1px solid var(--line); }
.sec-head { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-5); margin-bottom: var(--space-6); }
.sec-head h2 { font-family: var(--font-display); font-weight: 500; font-size: clamp(32px, 4vw, 44px); line-height: 1.12; letter-spacing: -0.01em; }
.sec-head .intro { color: var(--ink-muted); font-size: 18px; line-height: 31px; max-width: 56ch; padding-top: 24px; }
.body-col { margin-left: calc(240px + var(--space-5)); min-width: 0; }
@media (max-width: 900px) { .sec-head { grid-template-columns: 1fr; gap: var(--space-3); margin-bottom: var(--space-5); } .body-col { margin-left: 0; } section.block { padding-block: var(--space-6); } .card { padding: 24px; } }

/* Figures */
.figures { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.fig { padding: 36px 28px 36px 0; display: flex; flex-direction: column; gap: 14px; }
.fig + .fig { padding-left: 28px; border-left: 1px solid var(--line); }
.fig .num { background: linear-gradient(90deg, #5b3fff, #1d8fc4); -webkit-background-clip: text; background-clip: text; color: transparent; font-family: var(--font-display); font-weight: 500; font-size: clamp(24px, 2.1vw, 32px); white-space: nowrap; line-height: 1.1; align-self: flex-start; padding-right: 2px; font-variant-numeric: tabular-nums; }
.fig p { color: var(--ink-muted); font-size: 15px; line-height: 23px; }
.sources { margin-top: 32px; }
@media (max-width: 900px) { .figures { grid-template-columns: repeat(2, minmax(0, 1fr)); } .fig:nth-child(3) { padding-left: 0; border-left: 0; } .fig:nth-child(n+3) { border-top: 1px solid var(--line); } }
@media (max-width: 480px) { .figures { grid-template-columns: 1fr; } .fig + .fig { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); } }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 40px; list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps li { display: flex; flex-direction: column; gap: 12px; padding-top: 32px; border-top: 1px solid var(--line); position: relative; }
.steps li::before { counter-increment: step; content: "0" counter(step); font: 500 12px/16px var(--font-mono); letter-spacing: 0.08em; color: var(--ink-muted); }
.steps li .marker { position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: var(--radius-full); background: var(--ground); border: 1.5px solid var(--ink-muted); }
.steps li.decide .marker { background: var(--seal); border-color: var(--seal); }
.steps h3 { font: 600 20px/26px var(--font-sans); }
.steps p { color: var(--ink-muted); font-size: 15px; line-height: 23px; }
.who-acts { font: 500 11px/16px var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--leman); }
.steps li.decide .who-acts { color: var(--seal-ink); }
.pull { margin-top: var(--space-6); font-family: var(--font-display); font-size: clamp(24px, 3vw, 30px); line-height: 1.3; max-width: 30em; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--space-5); } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

/* Modules */
.modules { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.mod { padding: 40px 40px 56px 0; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: var(--space-2); min-width: 0; }
.mod:nth-child(even) { padding-left: 40px; border-left: 1px solid var(--line); }
.mod h3 { font: 600 20px/26px var(--font-sans); }
.mod p { color: var(--ink-muted); max-width: 34em; }
.next { margin-top: 40px; color: var(--ink-muted); font-size: 15px; }
.next b { color: var(--ink); font-weight: 600; }
@media (max-width: 700px) { .modules { grid-template-columns: 1fr; } .mod:nth-child(even) { padding-left: 0; border-left: 0; } .mod { padding-right: 0; } }

/* Principles */
.principles { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px 64px; }
.principles li { display: grid; grid-template-columns: 28px 1fr; gap: var(--space-3); align-items: start; min-width: 0; }
.principles svg { width: 28px; height: 28px; stroke: var(--leman); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; margin-top: 2px; }
.principles h3 { font: 600 18px/24px var(--font-sans); margin-bottom: 4px; }
.principles p { color: var(--ink-muted); font-size: 15px; line-height: 23px; }
@media (max-width: 700px) { .principles { grid-template-columns: 1fr; } }

/* Who we are */
.about { display: grid; grid-template-columns: minmax(0, 1fr) 288px; gap: 40px; align-items: start; }
.about-text { display: flex; flex-direction: column; gap: 24px; font-size: 18px; line-height: 30px; max-width: var(--measure); min-width: 0; }
.disciplines { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.disciplines li { display: flex; justify-content: space-between; gap: var(--space-3); padding: 14px 0; border-bottom: 1px solid var(--line); font-weight: 500; }
.disciplines li span:last-child { font: 400 12px/24px var(--font-mono); color: var(--ink-muted); letter-spacing: 0.04em; }
.company { margin-top: var(--space-4); display: flex; flex-direction: column; gap: 2px; }
@media (max-width: 900px) { .about { grid-template-columns: 1fr; gap: var(--space-5); } }

/* Research invitation */
.invite { background: radial-gradient(70% 90% at 100% 0%, rgba(35,201,212,0.30), transparent 60%), linear-gradient(135deg, #2b1fa8, #123e9e 55%, #0e5f6e); color: var(--on-deep); border-radius: var(--radius-m); padding: clamp(32px, 7vw, 96px); display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; }
.invite h2 { font-family: var(--font-display); font-weight: 500; font-size: clamp(32px, 4vw, 46px); line-height: 1.1; letter-spacing: -0.01em; }
.invite .label { color: var(--on-deep-muted); }
.invite p { color: var(--on-deep-muted); font-size: 18px; line-height: 29px; }
.invite p.label { font: 500 12px/16px var(--font-mono); }
.invite p.ref { font: 400 13px/20px var(--font-mono); }
.invite p.copy-note { font: 400 12px/18px var(--font-mono); }
.invite-left { display: flex; flex-direction: column; gap: 32px; min-width: 0; }
.topics { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.topics li { padding: 16px 0; border-top: 1px solid rgba(243,245,244,0.18); color: var(--on-deep); display: grid; grid-template-columns: 28px 1fr; }
.topics li span { font: 500 12px/24px var(--font-mono); color: var(--on-deep-muted); }
.invite-right { display: flex; flex-direction: column; gap: 32px; min-width: 0; }
.commit { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.commit li { display: flex; gap: 10px; align-items: baseline; color: var(--on-deep); }
.commit li::before { content: ""; width: 7px; height: 7px; border-radius: var(--radius-full); border: 1.5px solid var(--on-deep-muted); flex: none; transform: translateY(-1px); }
.contact { background: rgba(243,245,244,0.06); border: 1px solid rgba(243,245,244,0.18); border-radius: var(--radius-m); padding: 32px; display: flex; flex-direction: column; gap: var(--space-3); }
.email-row { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.email { font: 500 17px/24px var(--font-mono); color: var(--on-deep); word-break: break-all; text-decoration: none; }
.email:hover { text-decoration: underline; }
.copy { background: var(--on-deep); color: #1a1f5c; border: 0; border-radius: var(--radius-full); min-height: 40px; padding: 8px 14px; font: 600 14px/20px var(--font-sans); cursor: pointer; }
.copy-note { font: 400 12px/18px var(--font-mono); color: var(--on-deep-muted); min-height: 18px; }
.contact .label + .btn { align-self: flex-start; }
.invite .ref { color: var(--on-deep-muted); }
@media (max-width: 900px) { .invite { grid-template-columns: 1fr; gap: 48px; } }

/* Footer */
footer { padding-block: var(--space-6) var(--space-5); }
.foot { display: grid; grid-template-columns: 1fr auto; gap: var(--space-5); align-items: end; }
.foot .brand svg { height: 26px; }
.foot-legal { display: flex; flex-direction: column; gap: 4px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-top: 8px; }
.disclaimer { margin-top: var(--space-5); padding-top: var(--space-4); border-top: 1px solid var(--line); color: var(--ink-muted); font-size: 13px; line-height: 20px; max-width: 70ch; }
@media (max-width: 700px) { .foot { grid-template-columns: 1fr; } }

/* Legal pages */
.doc { padding-block: var(--space-6); }
.doc .inner { max-width: 720px; display: flex; flex-direction: column; gap: 20px; }
.doc h1 { font-family: var(--font-display); font-weight: 500; font-size: clamp(34px, 4.5vw, 48px); line-height: 1.1; letter-spacing: -0.01em; margin-bottom: 8px; }
.doc h2 { font: 600 19px/26px var(--font-sans); margin-top: 20px; }
.doc p, .doc li { color: var(--ink-muted); }
.doc ul { margin: 0; padding-left: 20px; }
.doc dl { display: grid; grid-template-columns: 180px 1fr; gap: 6px 20px; margin: 0; }
.doc dt { font: 500 12px/29px var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-muted); }
.doc dd { margin: 0; }
@media (max-width: 560px) { .doc dl { grid-template-columns: 1fr; gap: 0; } .doc dd { margin-bottom: 10px; } }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.foot-addr { margin-top: 12px; }
.disciplines li { gap: 12px; font-size: 15px; align-items: baseline; }
.disciplines li span { white-space: nowrap; }
.disciplines li span:last-child { font-size: 11px; letter-spacing: 0.02em; }