/* Brand system shared by every page: tokens, base type, header, components, contact block. */

/* ---- Tokens ---- */
:root {
  --paper: #f6f6f4;
  --ink: #0d0d0d;
  --ink-rgb: 13, 13, 13;
  --g1: #e6e6e3; --g2: #d4d4d1; --g3: #bdbdba; --g4: #a1a19e; --g5: #858583;
  --g6: #686866; --g7: #4d4d4b; --g8: #333332; --g9: #1e1e1d;
  --muted: #686866;
  --line: rgba(13, 13, 13, 0.12);
  --line2: rgba(13, 13, 13, 0.28);
  --signal: #ff4d1a;
  --ease: cubic-bezier(.65, 0, .35, 1);
  --pad: clamp(20px, 6vw, 96px);
  --mono: 'Geist Mono', ui-monospace, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --paper: #0b0b0b;
  --ink: #f1f1ee;
  --ink-rgb: 241, 241, 238;
  --g1: #1b1b1a; --g2: #2a2a29; --g3: #3e3e3c; --g4: #575755; --g5: #727270;
  --g6: #8f8f8c; --g7: #adadaa; --g8: #cbcbc8; --g9: #e2e2df;
  --muted: #8f8f8c;
  --line: rgba(241, 241, 238, 0.12);
  --line2: rgba(241, 241, 238, 0.28);
  --signal: #ff6a3d;
  color-scheme: dark;
}

/* ---- Base ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; background: var(--paper); color: var(--ink); }
body {
  font-family: 'Geist', system-ui, -apple-system, sans-serif;
  font-size: 18px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
}
::selection { background: var(--ink); color: var(--paper); }
a { color: inherit; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 5px; }
a:hover { text-decoration-thickness: 3px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
h1, h2, h3 { margin: 0; font-weight: 600; }
.mono { font-family: var(--mono); }
.num { font-variant-numeric: tabular-nums; }
.eyebrow {
  font-family: var(--mono); font-size: 12px; font-weight: 400; line-height: 1.5;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted);
}
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { max-width: 1200px; width: 100%; margin: 0 auto; }
.page { padding: 0 var(--pad); }

/* Type scale: huge headlines next to tiny mono labels. */
.display { font-size: clamp(64px, 13vw, 184px); letter-spacing: -0.055em; line-height: 0.92; }
.h1 { font-size: clamp(72px, 10vw, 112px); letter-spacing: -0.045em; line-height: 0.95; }
.h2 { font-size: clamp(36px, 4.6vw, 56px); letter-spacing: -0.04em; line-height: 1; }
.h3 { font-size: 24px; font-weight: 500; letter-spacing: -0.02em; line-height: 1.25; }
.lede { font-size: clamp(20px, 2.2vw, 26px); line-height: 1.4; }
.intro { font-size: clamp(19px, 2vw, 22px); max-width: 46ch; }
.prose p { font-size: 19px; line-height: 1.7; max-width: 68ch; text-wrap: pretty; }
.small { font-size: 15px; color: var(--muted); }

/* Inner page opening: eyebrow -> title -> one-line intro -> hairline. */
.page-head { padding-top: clamp(64px, 10vw, 128px); }
.page-head .h1 { margin-top: 24px; }
.page-head .intro { margin: 24px 0 0; }
.page-head + .rule, .rule { margin-top: 48px; border: 0; border-top: 1px solid var(--line2); }

/* ---- Logo: NEY opens to N9E6Y ---- */
.ney { display: inline-flex; align-items: baseline; white-space: nowrap; }
.ney-x { display: inline-grid; grid-template-columns: 0fr; opacity: 0;
         transition: grid-template-columns .7s var(--ease), opacity .3s ease; }
.ney-x > span { overflow: hidden; min-width: 0; }
.ney.open .ney-x { grid-template-columns: 1fr; opacity: 1;
         transition: grid-template-columns .7s var(--ease), opacity .45s ease .25s; }
.mono-mark { display: inline-flex; font-weight: 700; letter-spacing: -0.08em; line-height: 0.8; }
.mono-mark span + span { display: inline-block; transform: rotate(180deg); }

/* ---- Header ---- */
header.site {
  position: sticky; top: 0; z-index: 30;
  padding: 0 var(--pad);
  background: var(--paper); border-bottom: 1px solid var(--line);
}
header.site .bar { max-width: 1200px; margin: 0 auto; height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
header.site .brand {
  flex-shrink: 0; text-decoration: none;
  font-size: 22px; font-weight: 600; letter-spacing: -0.04em; line-height: 1;
  padding: 6px 4px; margin-left: -4px; border-radius: 4px;
}
header.site nav { display: flex; align-items: center; gap: 4px; font-size: 15px; }
.nav-links { display: contents; }
.nav-links a { text-decoration: none; padding: 8px 12px; border-radius: 4px; transition: background .2s; }
.nav-links a:hover { background: var(--line); }
.nav-links a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
#theme-toggle {
  margin-left: 8px; display: flex; align-items: center; gap: 8px;
  background: transparent; color: var(--ink);
  border: 1px solid var(--line2); border-radius: 999px; padding: 6px 12px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  cursor: pointer; transition: background .2s;
}
#theme-toggle:hover { background: var(--line); }
#theme-toggle .half { width: 10px; height: 10px; border-radius: 50%; border: 1px solid var(--ink); background: linear-gradient(90deg, var(--ink) 50%, transparent 50%); }
.menu-btn { display: none; }

@media (max-width: 720px) {
  header.site nav { gap: 8px; }
  #theme-toggle { margin-left: 0; width: 44px; height: 44px; padding: 0; justify-content: center; }
  #theme-toggle .half { width: 12px; height: 12px; }
  #theme-toggle .label { display: none; }
  /* Same outlined style as the theme toggle, so it follows the theme. */
  .menu-btn {
    display: block; height: 44px; padding: 0 16px; cursor: pointer;
    background: transparent; color: var(--ink);
    border: 1px solid var(--line2); border-radius: 999px;
    font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
    transition: background .2s;
  }
  .menu-btn:hover, header.site.menu-open .menu-btn { background: var(--line); }

  /* Dropdown wipes down from the header; links rise in one after another. Closing reverses without the stagger. */
  .nav-links {
    display: flex; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; padding: 8px var(--pad) 32px;
    background: var(--paper); border-bottom: 1px solid var(--line);
    visibility: hidden; clip-path: inset(0 0 100% 0);
    transition: clip-path .45s var(--ease), visibility 0s linear .45s;
  }
  header.site.menu-open .nav-links {
    visibility: visible; clip-path: inset(0 0 -1px 0);
    transition: clip-path .5s var(--ease), visibility 0s;
  }
  .nav-links a {
    display: flex; justify-content: space-between; align-items: baseline;
    padding: 10px 0; border-radius: 0; border-bottom: 1px solid var(--line);
    font-size: 44px; font-weight: 600; letter-spacing: -0.045em; line-height: 1.2;
    opacity: 0; transform: translateY(12px);
    transition: opacity .2s ease, transform .3s var(--ease);
  }
  header.site.menu-open .nav-links a {
    opacity: 1; transform: none;
    transition: opacity .4s ease, transform .5s var(--ease);
  }
  header.site.menu-open .nav-links a:nth-child(2) { transition-delay: .05s; }
  header.site.menu-open .nav-links a:nth-child(3) { transition-delay: .1s; }
  .nav-links a:last-child { border-bottom: 0; }
  .nav-links a:hover { background: transparent; }
}

/* ---- Components ---- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 4px; border: 1px solid var(--ink);
  background: var(--ink); color: var(--paper);
  font: 500 15px/1 'Geist', system-ui, sans-serif; text-decoration: none; cursor: pointer;
}
.btn.outline { background: transparent; color: var(--ink); transition: background .2s; }
.btn.outline:hover { background: var(--line); }
.link-thick { font-weight: 500; text-underline-offset: 6px; }

.pill {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 48px; height: 48px; padding: 0; border: 1px solid var(--ink); border-radius: 50%;
  text-decoration: none; transition: background .2s;
}
.pill:hover { background: var(--line); }
.pill svg, .pill .glyph { display: block; width: 18px; height: 18px; }
.pill svg { width: 20px; height: 20px; }
.pill .glyph { background: var(--ink); }

.chip {
  display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 8px 16px;
  border: 1px solid var(--line2); border-radius: 999px; background: transparent; color: var(--ink);
  font-family: var(--mono); font-size: 13px; cursor: pointer; transition: background .2s;
}
.chip:hover { background: var(--line); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.tag {
  display: inline-block; padding: 2px 8px; border: 1px solid var(--line2); border-radius: 3px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted);
}

/* Ledger rows: hairline-separated, mono left column. */
.ledger { border-top: 1px solid var(--ink); }
.ledger > * {
  display: flex; gap: 24px; align-items: baseline;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
a.row-link { text-decoration: none; transition: background .2s; }
a.row-link:hover { background: var(--line); }

/* Code block, blockquote, callout. */
.code { border: 1px solid var(--line2); border-radius: 6px; overflow: hidden; }
.code .code-head { display: flex; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 12px; color: var(--muted); }
.code pre { margin: 0; padding: 20px 16px; overflow-x: auto; font: 14px/1.7 var(--mono); }
.code .kw { font-weight: 600; }
.code .str { color: var(--muted); }
blockquote { margin: 32px 0; padding-left: 24px; border-left: 2px solid var(--ink); font-size: 24px; line-height: 1.4; letter-spacing: -0.01em; max-width: 40ch; }
.callout {
  display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: baseline;
  margin-top: 48px; padding: 20px 24px; border: 1px dashed var(--line2); border-radius: 6px;
  font-size: 16px;
}
.callout .eyebrow { color: var(--ink); }

/* ---- Reveal: fade + 12px rise, once ---- */
.js [data-reveal] { opacity: 0; transform: translateY(12px); transition: opacity .65s var(--ease), transform .65s var(--ease); }
.js [data-reveal].in { opacity: 1; transform: none; }

/* ---- Contact block (ends every page) ---- */
.contact {
  display: flex; flex-direction: column;
  margin-top: 128px; padding: 128px var(--pad) 24px;
  border-top: 1px solid var(--line2);
}
.contact .inner { max-width: 1200px; width: 100%; margin: 0 auto; flex: 1; display: flex; flex-direction: column; justify-content: center; }
.contact h2 { margin-top: 24px; }
.contact .lede { margin: 32px 0 0; }
.contact .pills { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 8px; }
.site-foot {
  max-width: 1200px; width: 100%; margin: 96px auto 0; padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
}
.site-foot .sig { display: flex; align-items: center; gap: 12px; }
.site-foot .mono-mark { font-family: 'Geist', sans-serif; font-size: 18px; color: var(--ink); }
.site-foot a { color: var(--ink); text-decoration: none; }
.site-foot a:hover { text-decoration: underline; }

/* ---- Page transitions: a subtle cross-page fade where supported ---- */
@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) { animation-duration: .3s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  ::view-transition-group(*), ::view-transition-old(*), ::view-transition-new(*) { animation: none !important; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}