/* Eidosoma — design tokens */
:root {
  --bg: oklch(0.97 0.008 85);
  --bg-soft: oklch(0.94 0.012 80);
  --bg-deep: oklch(0.91 0.014 75);
  --ink: oklch(0.22 0.015 60);
  --ink-soft: oklch(0.38 0.02 60);
  --ink-mute: oklch(0.55 0.02 60);
  --rule: oklch(0.86 0.012 70);
  --accent: oklch(0.58 0.15 35);    /* iron-oxide */
  --accent-2: oklch(0.62 0.12 145); /* moss */
  --accent-soft: oklch(0.92 0.04 35);

  --serif: 'Instrument Serif', 'Cormorant Garamond', Georgia, serif;
  --sans: 'Geist', 'Söhne', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, Menlo, monospace;

  --maxw: 1360px;
  --gutter: clamp(20px, 4vw, 56px);
}

[data-theme="dark"] {
  --bg: oklch(0.16 0.012 60);
  --bg-soft: oklch(0.20 0.014 60);
  --bg-deep: oklch(0.23 0.016 60);
  --ink: oklch(0.94 0.008 85);
  --ink-soft: oklch(0.78 0.012 80);
  --ink-mute: oklch(0.60 0.016 70);
  --rule: oklch(0.30 0.016 60);
  --accent-soft: oklch(0.32 0.06 35);
}

[data-accent="moss"] {
  --accent: oklch(0.58 0.13 150);
  --accent-soft: oklch(0.92 0.035 150);
}
[data-accent="iris"] {
  --accent: oklch(0.55 0.15 285);
  --accent-soft: oklch(0.92 0.04 285);
}
[data-accent="saffron"] {
  --accent: oklch(0.72 0.16 75);
  --accent-soft: oklch(0.94 0.05 75);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 400ms ease, color 400ms ease;
}

a { color: inherit; text-decoration: none; }

.serif { font-family: var(--serif); font-weight: 400; letter-spacing: -0.01em; }
.mono { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink-mute); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--rule) 60%, transparent);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.logo { display: flex; align-items: center; gap: 12px; font-family: var(--serif); font-size: 1.35rem; letter-spacing: -0.01em; }
.logo-mark { width: 32px; height: 32px; }
[data-theme="dark"] .logo-mark { filter: invert(0.92) brightness(1.1); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: 0.9rem; color: var(--ink-soft); transition: color 200ms; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -6px; left: 0; right: 0; height: 1px;
  background: var(--accent);
}
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-cta {
  padding: 8px 16px; border-radius: 999px;
  background: var(--ink); color: var(--bg);
  font-size: 0.85rem; font-weight: 500;
  transition: transform 200ms, opacity 200ms;
}
.nav-cta:hover { transform: translateY(-1px); opacity: 0.9; }
.nav-menu-toggle {
  display: none;
  width: 42px; height: 42px; padding: 0;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  align-items: center; justify-content: center;
  flex-direction: column; gap: 4px;
  transition: background 180ms, border-color 180ms, transform 180ms;
}
.nav-menu-toggle:hover { border-color: var(--ink); background: var(--bg-soft); transform: translateY(-1px); }
.nav-menu-toggle span {
  width: 16px; height: 1.5px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 220ms ease, opacity 220ms ease;
}
.nav-menu-toggle.open span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-menu-toggle.open span:nth-child(2) { opacity: 0; }
.nav-menu-toggle.open span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
.nav-mobile-panel {
  display: none;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter) 14px;
}
.nav-mobile-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 1px solid var(--rule);
  border-radius: 22px;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  box-shadow: 0 24px 48px -36px rgba(0,0,0,0.35);
}
.nav-mobile-links a {
  display: block;
  padding: 12px 4px;
  color: var(--ink-soft);
  font-size: 1rem;
  transition: color 200ms, transform 200ms;
}
.nav-mobile-links a:hover,
.nav-mobile-links a.active {
  color: var(--ink);
  transform: translateX(4px);
}
.nav-mobile-cta {
  margin-top: 8px;
  text-align: center;
}
.nav-mobile-links .nav-mobile-cta,
.nav-mobile-links .nav-mobile-cta:hover,
.nav-mobile-links .nav-mobile-cta.active {
  color: var(--bg);
  transform: none;
}

.theme-toggle {
  width: 36px; height: 36px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--rule);
  background: transparent; color: var(--ink);
  cursor: pointer;
  transition: background 180ms, border-color 180ms, color 180ms, transform 180ms;
}
.theme-toggle:hover { border-color: var(--ink); background: var(--bg-soft); transform: translateY(-1px); }
.theme-toggle svg { display: block; }

@media (max-width: 1023px) {
  .nav-inner {
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 16px;
  }
  .logo { font-size: 1.2rem; }
  .nav-links,
  .nav-actions > .nav-cta {
    display: none;
  }
  .nav-menu-toggle {
    display: inline-flex;
  }
  .nav-mobile-panel.open {
    display: block;
  }
}

/* Sections */
section { padding: clamp(64px, 10vw, 140px) 0; position: relative; }
.eyebrow {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-mute);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ''; width: 18px; height: 1px; background: var(--accent);
}

h1, h2, h3, h4 { margin: 0; font-weight: 400; }
.h-display { font-family: var(--serif); font-size: clamp(3.4rem, 7.2vw, 7.5rem); line-height: 0.98; letter-spacing: -0.02em; }
.h-1 { font-family: var(--serif); font-size: clamp(2.6rem, 5vw, 4.4rem); line-height: 1.02; letter-spacing: -0.02em; }
.h-2 { font-family: var(--serif); font-size: clamp(2rem, 3.4vw, 3rem); line-height: 1.05; letter-spacing: -0.015em; }
.h-3 { font-family: var(--serif); font-size: clamp(1.5rem, 2vw, 1.9rem); line-height: 1.15; letter-spacing: -0.01em; }

.italic-hl { font-style: italic; color: var(--accent); }

p.lede { font-size: clamp(1.1rem, 1.4vw, 1.35rem); line-height: 1.55; color: var(--ink-soft); max-width: 62ch; }
p { color: var(--ink-soft); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px;
  font-size: 0.95rem; font-weight: 500;
  cursor: pointer; border: 1px solid transparent;
  transition: all 240ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--ink); }
.btn .arrow { transition: transform 240ms; }
.btn:hover .arrow { transform: translateX(3px); }

/* Cards */
.card {
  background: var(--bg-soft);
  border: 1px solid var(--rule);
  border-radius: 18px;
  padding: 28px;
  transition: border-color 240ms, transform 240ms, background 240ms;
}
.card:hover { border-color: color-mix(in oklab, var(--accent) 50%, var(--rule)); }

/* Grid utilities */
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Hero */
.hero {
  min-height: 100vh;
  padding-top: 120px;
  display: flex; flex-direction: column; justify-content: space-between;
  position: relative; overflow: hidden;
}
.hero-canvas {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; }
.hero-manifesto {
  max-width: 22ch;
  font-family: var(--serif);
  font-size: clamp(3.4rem, 7.2vw, 7.2rem);
  line-height: 0.98;
  letter-spacing: -0.025em;
}
.hero-manifesto .living { color: var(--accent); font-style: italic; }
.hero-sub {
  margin-top: 36px; max-width: 54ch;
  font-size: clamp(1.05rem, 1.25vw, 1.22rem);
  color: var(--ink-soft); line-height: 1.55;
}
.hero-meta {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-top: 60px; padding-top: 24px;
  border-top: 1px solid var(--rule);
  flex-wrap: wrap; gap: 24px;
}
@media (max-width: 1023px) {
  .hero {
    min-height: 100svh;
    padding-top: 96px;
  }
  .hero-content {
    padding-top: 40px !important;
    padding-bottom: 16px !important;
  }
  .hero-sub {
    margin-top: 24px;
  }
  .hero-meta {
    margin-top: 20px;
    padding-top: 18px;
    gap: 16px;
  }
}

/* Footer */
.footer {
  border-top: 1px solid var(--rule);
  padding: 80px 0 40px;
  background: var(--bg-soft);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer h4 { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--ink-mute); margin-bottom: 18px; font-weight: 400; }
.footer a { display: block; padding: 6px 0; color: var(--ink-soft); font-size: 0.95rem; }
.footer a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 60px; padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-family: var(--mono); font-size: 0.72rem; color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.14em;
}

/* Tweaks panel */
.tweaks {
  position: fixed; right: 20px; bottom: 20px; z-index: 100;
  background: var(--bg); border: 1px solid var(--rule); border-radius: 16px;
  padding: 20px; width: 260px;
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.25);
  font-size: 0.85rem;
  display: none;
}
.tweaks.open { display: block; }
.tweaks h4 { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--ink-mute); margin: 0 0 14px; font-weight: 400; }
.tweak-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; gap: 12px; }
.tweak-row:last-child { margin-bottom: 0; }
.swatches { display: flex; gap: 8px; }
.swatch {
  width: 22px; height: 22px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; transition: transform 200ms;
}
.swatch:hover { transform: scale(1.15); }
.swatch.active { border-color: var(--ink); }
.toggle {
  width: 40px; height: 22px; background: var(--rule); border-radius: 999px;
  position: relative; cursor: pointer; transition: background 200ms;
}
.toggle::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%; background: var(--bg);
  transition: transform 200ms;
}
.toggle.on { background: var(--accent); }
.toggle.on::after { transform: translateX(18px); }
.segmented {
  display: flex; background: var(--bg-soft); border-radius: 8px; padding: 2px; gap: 2px;
}
.segmented button {
  flex: 1; border: 0; background: transparent; padding: 4px 8px; border-radius: 6px;
  font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-mute); cursor: pointer;
}
.segmented button.on { background: var(--bg); color: var(--ink); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 800ms ease, transform 800ms cubic-bezier(0.2, 0.8, 0.2, 1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* Dynamic paper */
.paper {
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 20px;
  overflow: hidden;
  font-family: var(--serif);
}
.paper-head {
  padding: 24px 28px; border-bottom: 1px solid var(--rule);
  display: flex; justify-content: space-between; align-items: center;
  background: var(--bg-soft);
}
.live-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-right: 8px; animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.4); } }
.paper-body { padding: 32px; }
.paper-title { font-family: var(--serif); font-size: 1.9rem; line-height: 1.15; letter-spacing: -0.015em; margin-bottom: 14px; }
.paper-meta { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-mute); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 24px; }
.paper-abstract { font-family: var(--serif); font-size: 1.1rem; line-height: 1.55; color: var(--ink-soft); font-style: italic; }
.paper-updates {
  border-top: 1px dashed var(--rule);
  padding: 20px 28px; background: var(--bg-soft);
  font-family: var(--sans); font-size: 0.88rem;
}
.update-item { display: flex; gap: 14px; padding: 8px 0; color: var(--ink-soft); }
.update-time { font-family: var(--mono); font-size: 0.7rem; color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; min-width: 90px; }

/* Module expand */
.module {
  border: 1px solid var(--rule); border-radius: 20px;
  padding: 0; overflow: hidden; transition: background 240ms;
  cursor: pointer;
}
.module:hover { background: var(--bg-soft); }
.module-head {
  padding: 28px 32px; display: flex; align-items: baseline; gap: 28px;
}
.module-num {
  font-family: var(--serif); font-size: clamp(1.4rem, 2vw, 1.8rem);
  color: var(--ink-mute); letter-spacing: -0.01em; line-height: 1.2;
  font-feature-settings: "tnum" 1;
  min-width: 2.4ch;
}
.module-head > .module-body-content { flex: 1; }
.module-title { font-family: var(--serif); font-size: clamp(1.4rem, 2vw, 1.8rem); line-height: 1.2; letter-spacing: -0.01em; }
.module-toggle {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: center;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), background 200ms, border-color 200ms;
}
.module.open .module-toggle { transform: rotate(45deg); background: var(--accent); border-color: var(--accent); color: var(--bg); }
.module-body {
  max-height: 0; overflow: hidden;
  transition: max-height 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.module.open .module-body { max-height: 900px; }
.module-body-inner { padding: 0 32px 32px 32px; display: grid; grid-template-columns: calc(2.4ch + 28px) 1fr; gap: 0; }
.module-body p { font-size: 1.02rem; line-height: 1.65; max-width: 62ch; }
.module-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag { font-family: var(--mono); font-size: 0.68rem; padding: 4px 10px; border-radius: 999px; background: var(--bg-soft); color: var(--ink-mute); letter-spacing: 0.08em; text-transform: uppercase; border: 1px solid var(--rule); }

/* Research cards */
.research-card {
  padding: 32px; border: 1px solid var(--rule); border-radius: 20px;
  display: flex; flex-direction: column; gap: 18px; min-height: 340px;
  background: var(--bg);
  position: relative; overflow: hidden;
  transition: border-color 240ms;
}
.research-card:hover { border-color: var(--accent); }
.research-icon { height: 80px; margin-bottom: 8px; }
.research-card .q {
  margin-top: auto; padding-top: 18px; border-top: 1px dashed var(--rule);
  font-family: var(--serif); font-style: italic; color: var(--ink-soft); font-size: 1.02rem; line-height: 1.45;
}

/* Founder card */
.founder {
  display: grid; grid-template-columns: 280px 1fr; gap: 40px; align-items: start;
}
@media (max-width: 800px) { .founder { grid-template-columns: 1fr; } }
.founder-photo {
  aspect-ratio: 4/5; border-radius: 18px; overflow: hidden;
  background: var(--bg-soft); border: 1px solid var(--rule);
  position: relative;
}

/* Contact form */
.contact-form {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
@media (max-width: 700px) { .contact-form { grid-template-columns: 1fr; } }
.contact-form label { display: flex; flex-direction: column; gap: 8px; font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--ink-mute); }
.contact-form label.full { grid-column: 1 / -1; }
.contact-form input, .contact-form textarea, .contact-form select {
  background: transparent; border: 0; border-bottom: 1px solid var(--rule);
  padding: 10px 0; font-family: var(--sans); font-size: 1rem;
  color: var(--ink); outline: none; transition: border-color 200ms;
  border-radius: 0;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-bottom-color: var(--accent); }
.contact-form textarea { resize: vertical; min-height: 100px; }

/* News */
.news-item {
  display: grid; grid-template-columns: 140px 1fr auto; gap: 32px; padding: 24px 0;
  border-bottom: 1px solid var(--rule); align-items: baseline;
  transition: padding-left 240ms;
}
.news-item:hover { padding-left: 12px; }
.news-item:hover .news-arrow { transform: translateX(4px); color: var(--accent); }
.news-date { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-mute); letter-spacing: 0.1em; text-transform: uppercase; }
.news-title { font-family: var(--serif); font-size: 1.4rem; line-height: 1.25; letter-spacing: -0.01em; }
.news-arrow { transition: all 240ms; color: var(--ink-mute); }

/* Marquee of concepts */
.marquee {
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 24px 0; overflow: hidden;
  font-family: var(--serif); font-size: clamp(1.8rem, 3vw, 2.6rem);
  letter-spacing: -0.01em;
  white-space: nowrap;
  background: var(--bg-soft);
}
.marquee-track {
  display: inline-flex; gap: 142px; animation: marquee 80s linear infinite;
  padding-right: 142px;
}
.marquee span.dot { color: var(--accent); }
.marquee .em { font-style: italic; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Subpage hero */
.page-hero {
  padding: 180px 0 80px;
  border-bottom: 1px solid var(--rule);
}

/* Split layouts */
.split {
  display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 80px; align-items: start;
}
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 32px; } }

/* Stat / pill */
.pill-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.pill { padding: 6px 14px; border: 1px solid var(--rule); border-radius: 999px; font-family: var(--mono); font-size: 0.72rem; color: var(--ink-mute); letter-spacing: 0.08em; text-transform: uppercase; }
.pill.accent { border-color: var(--accent); color: var(--accent); }

/* Scrollbars subtle */
::selection { background: var(--accent); color: var(--bg); }

@media (min-width: 1024px) {
  .hero {
    min-height: 100vh;
  }
  .hero-meta {
    margin-top: 40px;
  }
  #manifesto {
    padding-top: clamp(28px, 4vw, 56px);
  }
}