/* ============================================================
   Digital EIA — manifesto · digitaleia.uk
   "Forest": drenched deep-green graphite, luminous fern signal,
   warm bone text. Distinct from ConsentPath's warm Survey Sheet.
   Type, scale and layout shared with Digital DCO; only the colour
   tokens in :root differ.
   ============================================================ */
:root {
  /* surfaces — deep forest graphite (drenched dark) */
  --paper: oklch(0.215 0.022 150);
  --paper-2: oklch(0.255 0.024 150);
  --paper-3: oklch(0.29 0.026 150);
  /* text — warm bone on forest graphite */
  --ink: oklch(0.93 0.014 150);
  --ink-soft: oklch(0.8 0.018 150);
  --muted: oklch(0.68 0.022 150);
  /* lines / grid */
  --line: oklch(0.34 0.028 150);
  --line-strong: oklch(0.46 0.034 150);
  --grid: oklch(0.228 0.022 150);
  /* accent — luminous fern-green signal */
  --accent: oklch(0.76 0.15 150);          /* decorative fills, focus ring, selection */
  --accent-press: oklch(0.82 0.14 150);    /* accent text on the dark surfaces (~8:1) */
  --accent-btn: oklch(0.76 0.15 150);      /* button background (dark text on top) */
  --accent-on-dark: oklch(0.82 0.14 150);  /* accent text on the deepest bands */
  --on-accent: oklch(0.18 0.03 150);       /* dark text on the fern button */
  /* map tones — decoration & data only */
  --water: oklch(0.7 0.1 220);
  --veg: oklch(0.75 0.13 150);
  --contour: oklch(0.76 0.08 90);
  /* deepest bands — header + hero + sign-off */
  --charcoal: oklch(0.16 0.018 150);
  --charcoal-raised: oklch(0.205 0.022 150);
  --dark-line: oklch(0.3 0.028 150);
  --dark-text: oklch(0.95 0.014 150);
  --dark-muted: oklch(0.72 0.022 150);
  /* status hues (data) */
  --st-approved: oklch(0.7 0.12 150);
  --st-review: oklch(0.78 0.12 70);
  --st-blocked: oklch(0.68 0.16 25);

  /* type scale (modular ~1.25) */
  --step--1: clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --step-0: clamp(1rem, 0.97rem + 0.16vw, 1.1rem);
  --step-1: clamp(1.2rem, 1.12rem + 0.4vw, 1.45rem);
  --step-2: clamp(1.45rem, 1.3rem + 0.75vw, 1.95rem);
  --step-3: clamp(1.85rem, 1.55rem + 1.5vw, 2.85rem);
  --step-4: clamp(2.4rem, 1.85rem + 2.75vw, 4.2rem);

  /* rhythm */
  --gutter: clamp(1.1rem, 0.6rem + 2.4vw, 2.6rem);
  --measure: 64ch;
  --maxw: 1240px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --sans: "Hanken Grotesk", system-ui, sans-serif;
  --display: "Bricolage Grotesque", "Hanken Grotesk", sans-serif;
  --mono: "Martian Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
  margin: 0;
  background-color: var(--paper);
  /* whisper-faint cartographic grid */
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 34px 34px;
  background-position: -1px -1px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  position: relative;
}

/* graticule "+" tick overlay — texture only */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(circle at center, var(--line) 0 0.6px, transparent 0.9px);
  background-size: 150px 150px;
  background-position: 75px 75px;
  opacity: 0.3;
  mask-image: linear-gradient(to bottom, transparent, #000 8%, #000 92%, transparent);
}

h1, h2, h3, h4 {
  font-family: var(--display);
  letter-spacing: -0.02em;
  line-height: 1.04;
  text-wrap: balance;
  color: var(--ink);
  margin: 0;
  font-weight: 600;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }

::selection { background: color-mix(in oklch, var(--accent) 24%, transparent); }

a:focus-visible, button:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ---- shared atoms ---- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

.mono {
  font-family: var(--mono);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  border-radius: 4px;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.7rem 1.15rem;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 150ms var(--ease-out), color 150ms var(--ease-out), border-color 150ms var(--ease-out), transform 150ms var(--ease-out);
  white-space: nowrap;
}
.btn--primary { background: var(--accent-btn); color: var(--on-accent); }
.btn--primary:hover { background: var(--accent-press); }
.btn--ghost-dark { background: transparent; color: var(--dark-text); border-color: var(--dark-line); }
.btn--ghost-dark:hover { background: color-mix(in oklch, var(--dark-text) 8%, transparent); }
.btn .arrow { transition: transform 150ms var(--ease-out); }
.btn:hover .arrow { transform: translateX(3px); }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: color-mix(in oklch, var(--charcoal) 92%, transparent);
  -webkit-backdrop-filter: saturate(1.1) blur(8px);
  backdrop-filter: saturate(1.1) blur(8px);
  border-bottom: 1px solid var(--dark-line);
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4rem;
}
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.82rem;
  color: var(--dark-text);
}
.wordmark .flag { font-size: 0.95em; letter-spacing: 0; line-height: 1; }
.site-nav { display: flex; align-items: center; gap: 1.6rem; }
.nav-links { display: flex; gap: 1.4rem; }
.nav-links a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dark-muted);
  transition: color 150ms var(--ease-out);
}
.nav-links a:hover { color: var(--dark-text); }

@media (max-width: 860px) {
  .nav-links { display: none; }
}

/* ============================================================
   Hero band (charcoal)
   ============================================================ */
.hero {
  background-color: var(--charcoal);
  color: var(--dark-text);
  border-bottom: 1px solid var(--dark-line);
  position: relative;
  overflow: hidden;
}
.hero::after {
  /* faint contour decoration top-right */
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle at center, var(--dark-line) 0 0.7px, transparent 1px);
  background-size: 150px 150px;
  background-position: 75px 75px;
  opacity: 0.45;
  mask-image: radial-gradient(120% 120% at 90% -10%, #000 0%, transparent 60%);
}
.hero-inner { padding-block: clamp(3.5rem, 2rem + 9vw, 7rem); position: relative; z-index: 1; }
.hero .eyebrow { color: var(--accent-on-dark); margin-bottom: 1.4rem; display: block; }
.hero h1 {
  font-size: var(--step-4);
  color: var(--dark-text);
  max-width: 18ch;
  font-weight: 700;
}
.hero .lede {
  margin-top: 1.6rem;
  max-width: 56ch;
  font-size: var(--step-1);
  color: var(--dark-muted);
  line-height: 1.5;
}
.hero-purpose {
  margin-top: 1.6rem;
  max-width: 56ch;
  padding-left: 1.1rem;
  border-left: 2px solid var(--accent-on-dark);
  font-size: var(--step-1);
  color: var(--dark-text);
  line-height: 1.5;
  font-weight: 500;
}

.hero-cta { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 0.8rem; }

/* stat strip under hero */
.stat-strip {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--dark-line);
  border: 1px solid var(--dark-line);
  border-radius: 4px;
  overflow: hidden;
}
.stat-strip .stat {
  background: var(--charcoal-raised);
  padding: 1.1rem 1.2rem;
}
.stat .fig {
  font-family: var(--display);
  font-size: var(--step-2);
  font-weight: 700;
  color: var(--dark-text);
  line-height: 1;
}
.stat .fig .unit { font-size: 0.55em; color: var(--accent-on-dark); margin-left: 0.15em; }
.stat .lbl { margin-top: 0.5rem; color: var(--dark-muted); font-size: 0.82rem; line-height: 1.35; }
@media (max-width: 760px) {
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 420px) {
  .stat-strip { grid-template-columns: 1fr; }
}

/* ============================================================
   Sections
   ============================================================ */
section { position: relative; z-index: 1; }
.section { padding-block: clamp(3.5rem, 2rem + 8vw, 6.5rem); }
.section-head { max-width: var(--measure); margin-bottom: 2.6rem; }
.section-head .eyebrow { display: block; margin-bottom: 0.9rem; }
.section-head h2 { font-size: var(--step-3); }
.section-head .intro { margin-top: 1.1rem; color: var(--ink-soft); font-size: var(--step-1); line-height: 1.5; max-width: 58ch; }
.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* the case — stat cards */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}
@media (max-width: 720px) { .case-grid { grid-template-columns: 1fr; } }
.case-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.case-card .fig {
  font-family: var(--display);
  font-size: var(--step-3);
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
}
.case-card .fig .unit { font-size: 0.4em; color: var(--accent-press); margin-left: 0.25em; font-weight: 600; }
.case-card .claim { font-weight: 500; color: var(--ink); }

/* why now — timeline */
.timeline { display: grid; gap: 0; max-width: 62ch; }
.t-node {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1.4rem;
  padding-block: 1.5rem;
  border-top: 1px solid var(--line);
  position: relative;
}
.t-node:first-child { border-top: 0; }
.t-node .year {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent-press);
  font-size: 0.95rem;
  padding-top: 0.15rem;
}
.t-node .t-body h3 { font-size: var(--step-1); margin-bottom: 0.4rem; }
.t-node .t-body p { color: var(--ink-soft); }

/* the manifesto — principles */
.manifesto-creed {
  max-width: 60ch;
  margin: 0 0 2.4rem;
  font-size: var(--step-1);
  color: var(--ink);
  line-height: 1.55;
  font-weight: 500;
}

.principles { display: grid; gap: 0; counter-reset: prin; }
.principle {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.6rem;
  padding-block: 1.7rem;
  border-top: 1px solid var(--line);
  align-items: start;
}
.principle .num {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--accent-press);
  font-size: 1rem;
  padding-top: 0.35rem;
}
.principle h3 { font-size: var(--step-2); }
.principle p { margin-top: 0.5rem; color: var(--ink-soft); max-width: 56ch; }

/* narrow the fixed rails on the smallest phones so the reading column stays comfortable */
@media (max-width: 480px) {
  .t-node { grid-template-columns: 3.25rem 1fr; gap: 1rem; }
  .principle { grid-template-columns: 2.5rem 1fr; gap: 1rem; }
}

/* vision */
.vision { background: var(--paper-2); border-block: 1px solid var(--line); }
.vision .v-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1.5rem, 1rem + 3vw, 3.5rem); align-items: center; }
@media (max-width: 820px) { .vision .v-grid { grid-template-columns: 1fr; } }
.vision h2 { font-size: var(--step-3); }
.vision p { margin-top: 1.1rem; color: var(--ink-soft); font-size: var(--step-1); line-height: 1.5; }
.vision .bridge { margin-top: 1.4rem; color: var(--ink); font-weight: 500; }
.v-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.8rem; }
.v-list li {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.95rem 1.1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
}
.v-list .tick { color: var(--accent-press); font-weight: 700; flex: none; }

/* sign-off */
.signoff { background: var(--charcoal); color: var(--dark-text); text-align: center; position: relative; overflow: hidden; }
.signoff::after {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(circle at center, var(--dark-line) 0 0.7px, transparent 1px);
  background-size: 150px 150px; background-position: 75px 75px; opacity: 0.4;
  mask-image: radial-gradient(120% 120% at 50% 120%, #000 0%, transparent 65%);
}
.signoff .inner { padding-block: clamp(3.5rem, 2rem + 8vw, 6.5rem); position: relative; z-index: 1; }
.signoff .eyebrow { color: var(--accent-on-dark); }
.signoff h2 { color: var(--dark-text); font-size: var(--step-3); margin-top: 0.9rem; max-width: 20ch; margin-inline: auto; }
.signoff p { color: var(--dark-muted); margin-top: 1.2rem; max-width: 52ch; margin-inline: auto; font-size: var(--step-1); }
.signoff-cta { margin-top: 2.2rem; display: flex; flex-wrap: wrap; gap: 0.8rem; justify-content: center; }
.signoff .champion { margin-top: 2.6rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--dark-muted); }
.signoff .champion a { color: var(--dark-text); border-bottom: 1px solid var(--dark-line); padding-bottom: 1px; }
.signoff .champion a:hover { border-color: var(--accent); }

/* footer */
.site-footer { background: var(--paper); border-top: 1px solid var(--line); }
.footer-inner { padding-block: 2rem; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 0.6rem 1.4rem; }
.footer-meta { color: var(--muted); font-size: var(--step--1); }
.footer-meta a { color: var(--ink-soft); border-bottom: 1px solid var(--line); }
.footer-meta a:hover { border-color: var(--accent); color: var(--ink); }

/* ---- reveal on scroll ---- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .btn .arrow { transition: none; }
}