/* transcortex.dev — single stylesheet, self-hosted Inter, no external requests. */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/assets/fonts/inter-latin-var.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122;
}

/* ---- Design tokens (light) ---------------------------------------------- */

:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --text: #1c1b1a;
  --text-muted: #6b6862;
  --accent: #0f5d6b;
  --accent-strong: #0a4652;
  --border: #e4e1dc;
  --shadow: rgba(28, 27, 26, 0.08);

  color-scheme: light dark;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17181a;
    --surface: #1f2124;
    --text: #e8e6e3;
    --text-muted: #9a968f;
    --accent: #6ec3d2;
    --accent-strong: #8fd4e0;
    --border: #2e3136;
    --shadow: rgba(0, 0, 0, 0.4);
  }
}

/* ---- Base ---------------------------------------------------------------- */

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
  hyphens: auto;
}

h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin: 0 0 0.75rem; }
h2 { font-size: clamp(1.3rem, 2.5vw, 1.6rem); margin: 2.5rem 0 1rem; }
h3 { font-size: 1.1rem; margin: 0 0 0.4rem; }

p { margin: 0 0 1rem; }

a {
  color: var(--accent);
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
  text-underline-offset: 3px;
}
a:hover { color: var(--accent-strong); }

.container {
  width: min(64rem, 100% - 2.5rem);
  margin-inline: auto;
}

/* ---- Header ---------------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-block: 0.9rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand span { color: var(--accent); }

.site-nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  row-gap: 0.5rem;
}
.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--text); }
.site-nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
}

.lang-switch { margin-left: auto; }
.lang-switch a {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.7rem;
  text-decoration: none;
}
.lang-switch a:hover { color: var(--accent); border-color: var(--accent); }

/* ---- Content ---------------------------------------------------------------- */

main {
  flex: 1;
  padding-block: 3rem 2rem;
}

.hero {
  padding-block: 1.5rem 1rem;
}
.hero h1 { max-width: 30ch; }

/* Static workflow illustration, using the site's existing colour palette. */
.hero--workflow {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-bottom: 2rem;
}

.hero-copy { min-width: 0; }

.eyebrow {
  display: block;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.workflow-figure {
  margin: 0;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 5%, var(--surface)), var(--surface) 65%);
}

.workflow-figure .eyebrow {
  margin-bottom: 0.35rem;
  color: var(--text-muted);
  font-size: 0.65rem;
}

.workflow-title {
  display: block;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.02em;
}

.workflow-steps {
  list-style: none;
  margin: 1.75rem 0;
  padding: 0;
}

.workflow-step {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  column-gap: 1rem;
  align-items: center;
  padding-bottom: 1.75rem;
}

.workflow-step:last-child { padding-bottom: 0; }

.workflow-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 2.5rem;
  bottom: 0.2rem;
  left: calc(1.25rem - 0.5px);
  width: 1px;
  background: var(--border);
}

.workflow-icon {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  align-self: start;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  color: var(--text-muted);
  background: var(--surface);
}

.workflow-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.workflow-step--accent .workflow-icon {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
}

.workflow-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
}

.workflow-detail {
  display: block;
  margin-top: 0.15rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
}

.workflow-note {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

.workflow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-underline-offset: 0.2em;
}

@media (min-width: 60rem) {
  .hero--workflow {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
  }
}

/* Compact service diagrams share the homepage illustration's visual language. */
.service-detail {
  display: grid;
  gap: 1.5rem;
  align-items: center;
  padding-block: 2.5rem;
  border-top: 1px solid var(--border);
}

.service-detail + .service-detail { margin-top: 0; }
.service-copy { min-width: 0; }
.service-copy h2 { margin-top: 0; }
.service-copy p:last-child { margin-bottom: 0; }

.page-intro { margin-bottom: 2rem; }
.page-intro .lead { max-width: 65ch; }

.cards.cards--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-output {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}
.card-output strong { color: var(--accent); }
.card p:last-child { margin-bottom: 0; }

.related-topics {
  margin-top: 3rem;
  padding-block: 2rem;
  border-top: 1px solid var(--border);
}
.related-topics h2 { margin-top: 0; }
.related-topics a { text-underline-offset: 0.2em; }
.source-note { color: var(--text-muted); font-size: 0.85rem; }

.example-input {
  margin: 1rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
  font-size: 1.1rem;
}
.example-output { margin: 1rem 0 0; }
.example-output div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: 1rem;
  padding-block: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.example-output dt { color: var(--text-muted); }
.example-output dd { margin: 0; font-weight: 500; }

@media (max-width: 47.99rem) {
  .header-inner { gap: 0.75rem 1rem; }
  .site-nav { order: 3; flex-basis: 100%; }
  .cards.cards--two { grid-template-columns: minmax(0, 1fr); }
  .example-output div { grid-template-columns: minmax(0, 1fr); gap: 0.15rem; }
}

.workflow-figure--service { padding: 1.5rem; }
.workflow-figure--service .workflow-title { font-size: 1.05rem; }
.workflow-figure--service .workflow-steps { margin-block: 1.25rem; }
.workflow-figure--service .workflow-step:not(:last-child) { padding-bottom: 1.25rem; }
.workflow-figure--service .workflow-note strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text);
  font-weight: 600;
}

@media (min-width: 60rem) {
  .service-detail {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
  }
}

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 55ch;
}

.cta-row {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.button {
  display: inline-block;
  padding: 0.55rem 1.2rem;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
}
.button:hover { background: var(--accent-strong); color: var(--bg); }

.button.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.button.ghost:hover { border-color: var(--accent-strong); color: var(--accent-strong); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.1rem;
  margin-block: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.2rem 1.3rem;
  box-shadow: 0 1px 3px var(--shadow);
}

.card .role {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: -0.3rem;
}

section + section { margin-top: 1.5rem; }

/* ---- Footer ---------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding-block: 1.4rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.site-footer p { margin: 0 0 0.4rem; }
.site-footer p:last-child { margin: 0; }

/* Customer-led navigation and editorial content. Native HTML; no scripts. */
.skip-link { position: absolute; left: 1rem; top: -5rem; z-index: 50; padding: .75rem 1rem; background: var(--surface); }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.header-inner { gap: 1rem; }
.site-nav { align-items: center; margin-left: auto; gap: .9rem; }
.site-nav a, .nav-group summary { font-size: .82rem; }
.nav-group { position: relative; }
.nav-group summary { display: flex; align-items: center; gap: .35rem; cursor: pointer; list-style: none; padding: .6rem 0; color: var(--text-muted); }
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary::after { content: ''; width: .35rem; height: .35rem; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); margin-top: -.2rem; }
.nav-group[open] summary::after { transform: rotate(225deg); margin-top: .2rem; }
.nav-group--active summary, .nav-group[open] summary { color: var(--accent); font-weight: 600; }
.nav-panel { position: absolute; top: 100%; left: 0; z-index: 20; width: 16rem; padding: .5rem; background: var(--surface); border: 1px solid var(--border); border-radius: .65rem; box-shadow: 0 12px 28px var(--shadow); }
.nav-panel a { display: block; padding: .7rem .8rem; border-radius: .35rem; }
.nav-panel a:hover, .nav-panel a:focus-visible { background: var(--bg); }
.site-nav .nav-contact { color: var(--accent); border: 1px solid var(--border); border-radius: .45rem; padding: .45rem .6rem; white-space: nowrap; }
.lang-switch { margin-left: 0; }
.breadcrumbs { color: var(--text-muted); font-size: .75rem; margin: -.7rem 0 1.6rem; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: .35rem .6rem; padding: 0; margin: 0; list-style: none; }
.breadcrumbs li + li::before { content: '/'; margin-right: .6rem; color: var(--border); }
.hero:not(.hero--workflow) .lead { max-width: 65ch; }
.hero:not(.hero--workflow) h1 { max-width: 28ch; }
.card > .workflow-icon { margin-bottom: 1rem; }
.paper-callout { display: flex; align-items: flex-start; gap: 1.25rem; margin-block: 3rem; padding: 2rem; background: var(--surface); border: 1px solid var(--border); border-radius: .75rem; }
.paper-callout > .workflow-icon { flex-shrink: 0; }
.paper-callout h2 { margin: 0 0 .75rem; }
.paper-callout .eyebrow { margin-bottom: .6rem; }
.paper-download { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); gap: 3rem; align-items: center; padding-block: 2rem; }
.paper-download img { display: block; width: 100%; height: auto; border: 1px solid var(--border); border-radius: .35rem; box-shadow: 0 10px 30px var(--shadow); }
.paper-download h2 { margin-top: 0; }
section[id], span[id], p[id] { scroll-margin-top: 1rem; }
@media (max-width: 63.99rem) {
 .site-nav { order: 3; flex-basis: 100%; margin-left: 0; justify-content: space-between; }
 .lang-switch { margin-left: auto; }
}
@media (max-width: 47.99rem) {
 .site-nav { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; }
 .nav-group summary, .site-nav > a { min-height: 2.75rem; font-size: .9rem; }
 .nav-group summary { justify-content: space-between; }
 .nav-panel { position: static; width: auto; margin-bottom: .75rem; box-shadow: none; border: 0; border-left: 2px solid var(--border); border-radius: 0; padding: 0 0 0 .6rem; }
 .site-nav > a { display: flex; align-items: center; }
 .site-nav .nav-contact { justify-content: center; margin-top: .35rem; }
 .paper-callout { padding: 1.25rem; gap: .85rem; }
 .paper-download { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
 .paper-download img { max-width: 15rem; margin-inline: auto; }
}

.mobile-navigation { display: none; }
@media (max-width: 47.99rem) {
 .site-header { position: relative; z-index: 30; }
 .header-inner { gap: .5rem; }
 .brand { font-size: 1rem; }
 .desktop-nav { display: none; }
 .mobile-navigation { display: block; margin-left: auto; }
 .mobile-navigation > summary { cursor: pointer; list-style: none; padding: .6rem .3rem; font-size: .85rem; color: var(--text); }
 .mobile-navigation > summary::-webkit-details-marker { display: none; }
 .mobile-navigation[open] > summary { color: var(--accent); text-decoration: underline; text-underline-offset: .3em; }
 .mobile-navigation > .site-nav { position: absolute; top: 100%; left: 0; right: 0; padding: .7rem 1.25rem 1.25rem; background: var(--surface); border-bottom: 1px solid var(--border); max-height: 75dvh; overflow-y: auto; box-shadow: 0 12px 20px var(--shadow); }
 .lang-switch { margin-left: .25rem; }
}