/* AI Tudu site styles. Tokens first; everything else reads from them. */
:root {
  --ink: #111111;
  --paper: #f3f5f7;
  --surface: #ffffff;
  --line: #d5dae0;
  --muted: #5b616e;
  --accent: #d9381e;
  --accent-text: #c2361a;
  --accent-ink: #ffffff;
  --ok: #1d7a4a;
  --warn: #a35a00;
  --code-bg: #e8ebef;

  --display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", Menlo, Consolas, monospace;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 32px);
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e9ecf0;
    --paper: #0e1013;
    --surface: #16191e;
    --line: #2a2e35;
    --muted: #9aa0ab;
    --accent: #ff5a3c;
    --accent-text: #ff5a3c;
    --accent-ink: #101216;
    --ok: #4cc98a;
    --warn: #f0a640;
    --code-bg: #1d2127;
  }
}
:root[data-theme="dark"] {
  --ink: #e9ecf0;
  --paper: #0e1013;
  --surface: #16191e;
  --line: #2a2e35;
  --muted: #9aa0ab;
  --accent: #ff5a3c;
  --accent-text: #ff5a3c;
  --accent-ink: #101216;
  --ok: #4cc98a;
  --warn: #f0a640;
  --code-bg: #1d2127;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--body);
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-text); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
h1, h2, h3 { font-family: var(--display); line-height: 1.08; letter-spacing: -.02em; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(38px, 5.6vw, 66px); font-weight: 700; }
h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 700; }
h3 { font-size: 22px; font-weight: 600; letter-spacing: -.01em; }
p { margin: 0 0 1em; text-wrap: pretty; }
.lede { font-size: clamp(18px, 2vw, 21px); color: var(--muted); max-width: 40em; }
.prose { max-width: 46em; }
.prose p:last-child { margin-bottom: 0; }

/* Header */
.site-head {
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 21px/1 var(--display); letter-spacing: -.02em; }
.brand:hover { color: var(--ink); }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 32px; height: 32px; border-radius: 6px;
  background: var(--ink); color: var(--paper);
  font: 600 15px/1 var(--mono); position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; right: 5px; bottom: 5px;
  width: 5px; height: 5px; border-radius: 1px; background: var(--accent);
}
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-ink);
  font: 600 15px/1 var(--body); text-decoration: none; white-space: nowrap;
  border: 1px solid var(--accent);
}
.btn:hover { color: var(--accent-ink); filter: brightness(1.06); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink); color: var(--ink); }
.site-head .btn { padding: 9px 15px; font-size: 14px; }
@media (max-width: 820px) { .nav { display: none; } .site-head .btn { margin-left: auto; } }

/* Sections */
section { padding: clamp(56px, 8vw, 96px) 0; border-bottom: 1px solid var(--line); }
.section-head { display: grid; gap: 14px; margin-bottom: 36px; max-width: 46em; }
.section-head .lede { margin: 0; }

/* Hero */
.hero { padding-top: clamp(48px, 7vw, 88px); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero .lede { margin: 22px 0 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Spend-control table: the hero's artefact, square-cornered on purpose */
.spec {
  background: var(--surface); border: 1px solid var(--line);
  font: 400 14px/1.45 var(--mono); overflow: hidden;
}
.spec-top { display: flex; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--muted); font: 500 13px/1.4 var(--body); }
.spec ol { list-style: none; margin: 0; padding: 6px 0; counter-reset: s; }
.spec li { display: grid; grid-template-columns: 26px 1fr auto; gap: 10px; align-items: baseline; padding: 11px 16px; border-bottom: 1px solid var(--line); counter-increment: s; }
.spec li:last-child { border-bottom: 0; }
.spec li::before { content: counter(s); color: var(--muted); font-size: 12px; }
.spec .where { color: var(--ink); }
.spec .where small { display: block; color: var(--muted); font-size: 12px; }
.tag { font: 600 11px/1 var(--mono); padding: 5px 7px; border-radius: 3px; white-space: nowrap; }
.tag.stop { color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.tag.alert { color: var(--warn); background: color-mix(in srgb, var(--warn) 14%, transparent); }
.spec-foot { padding: 12px 16px; border-top: 1px solid var(--line); font: 400 13px/1.5 var(--body); color: var(--muted); }
.spec-foot a { color: var(--ink); }

/* Tools line */
.stack { padding: 22px 0; border-bottom: 1px solid var(--line); }
.stack p { margin: 0; font-size: 15px; color: var(--muted); }

/* Services */
.lead-offer { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 30px; max-width: 52em; margin-bottom: 40px; }
.lead-offer h3 { font-size: 26px; margin-bottom: 10px; }
.lead-offer p { margin: 0; }
.services { display: grid; grid-template-columns: 1.3fr 1fr .8fr; gap: 36px; max-width: 64em; }
.services h3 { margin-bottom: 10px; }
.services p { margin: 0; color: var(--muted); }
.services ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; color: var(--muted); }
.services li { padding-left: 18px; position: relative; }
.services li::before { content: ""; position: absolute; left: 0; top: .66em; width: 8px; height: 2px; background: var(--accent); }
@media (max-width: 900px) { .services { grid-template-columns: 1fr; gap: 28px; } }
.shapes { margin-top: 36px; font-size: 15px; color: var(--muted); }

/* Work */
.case { display: grid; grid-template-columns: 220px 1fr; gap: 32px; padding: 32px 0; border-top: 1px solid var(--line); }
.case:last-of-type { border-bottom: 1px solid var(--line); }
.case .meta { font-size: 14px; color: var(--ink); font-weight: 600; }
.case .meta span { display: block; color: var(--muted); font-weight: 400; margin-top: 4px; }
.case h3 { margin-bottom: 12px; }
.case p { margin: 0; max-width: 46em; }
@media (max-width: 760px) { .case { grid-template-columns: 1fr; gap: 12px; } }
.note-small { font-size: 14px; color: var(--muted); margin-top: 18px; }
.also { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; max-width: 60em; }
.also h3 { margin-bottom: 8px; }
.also p { margin: 0; color: var(--muted); }
@media (max-width: 760px) { .also { grid-template-columns: 1fr; gap: 28px; } }

/* Notes */
.note-card { text-decoration: none; display: block; max-width: 46em; }
.note-card .date { font-size: 14px; color: var(--muted); }
.note-card h3 { margin: 8px 0 10px; font-size: 26px; }
.note-card p { margin: 0; color: var(--muted); }
.note-card:hover h3 { color: var(--accent-text); }

/* About */
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 24px; margin: 26px 0 0; font-size: 15px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }

/* Contact */
.contact { border-bottom: 0; }
.contact h2 { max-width: 20em; }
.contact p { margin: 18px 0 28px; max-width: 36em; color: var(--muted); }

footer { padding: 28px 0 40px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }

/* Article */
.article { padding-top: clamp(40px, 6vw, 72px); }
.article > .wrap { max-width: 760px; }
.article h1 { font-size: clamp(34px, 5vw, 54px); margin-bottom: 18px; }
.article h2 { font-size: clamp(24px, 3vw, 30px); margin: 48px 0 14px; }
.article h3 { margin: 28px 0 8px; }
.article .byline { font-size: 15px; color: var(--muted); margin-bottom: 32px; }
.article ul, .article ol { padding-left: 1.2em; }
.article li { margin-bottom: .45em; }
.article .contact { margin-top: 72px; }
.callout { border: 1px solid var(--line); background: var(--surface); padding: 18px 20px; border-radius: var(--radius); margin: 28px 0; }
.callout p:last-child { margin: 0; }
.table-wrap { overflow-x: auto; margin: 20px 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 15px; min-width: 560px; background: var(--surface); }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; font-size: 14px; }
tr:last-child td { border-bottom: 0; }
code { font: 400 .9em var(--mono); background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
.sources { font-size: 15px; }