@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600&family=Playfair+Display:ital,wght@0,400..900;1,400..900&family=Space+Grotesk:wght@300..700&display=swap');

:root {
  --bg: #F4F4F0;
  --ink: #111111;
  --cobalt: #0047FF;
  --acid: #DFFF00;
  --muted: rgba(17, 17, 17, 0.65);
  --rule: rgba(17, 17, 17, 0.1);

  --font-heading: 'Playfair Display', serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Dark page variant (Engage) */
body.theme-dark {
  --bg: #111111;
  --ink: #F4F4F0;
  --muted: rgba(244, 244, 240, 0.65);
  --rule: rgba(244, 244, 240, 0.15);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.15;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: var(--space-sm); }
h3 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: var(--space-sm); }

p.lead {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  max-width: 640px;
  color: var(--muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

a:hover { color: var(--cobalt); }
body.theme-dark a:hover { color: var(--acid); }

.kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--cobalt);
  margin-bottom: var(--space-sm);
  display: block;
}

body.theme-dark .kicker { color: var(--acid); }

/* Layout */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.col-12 { grid-column: span 12; }
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }

section { padding: var(--space-xl) 0; }
section + section { border-top: 1px solid var(--rule); }

/* Header */
header.site-header {
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: 1.25rem var(--space-md);
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(0.9rem, 2.5vw, 2.5rem);
}

nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 0.2rem;
  border-bottom: 2px solid transparent;
}

nav a.active {
  border-bottom-color: var(--cobalt);
  font-weight: 600;
}

body.theme-dark nav a.active { border-bottom-color: var(--acid); }

/* Hero */
.hero {
  padding: var(--space-xl) 0;
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.hero .lead { margin-top: var(--space-md); }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* Buttons */
.cta-button {
  display: inline-block;
  padding: 1rem 2rem;
  background-color: var(--ink);
  color: var(--bg);
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.cta-button:hover {
  background-color: var(--cobalt);
  color: #fff;
}

.cta-button.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}

.cta-button.secondary:hover {
  border-color: var(--cobalt);
  color: var(--cobalt);
}

body.theme-dark .cta-button {
  background-color: var(--acid);
  color: #111111;
}

body.theme-dark .cta-button:hover {
  background-color: var(--ink);
  color: var(--bg);
}

/* Cards (methodology, cycle, asks) */
.card {
  padding: var(--space-md);
  border: 1px solid var(--rule);
  height: 100%;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--cobalt);
}

.card h3, .card .card-label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
  color: var(--cobalt);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.05em;
}

body.theme-dark .card h3, body.theme-dark .card .card-label { color: var(--acid); }

.card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--muted);
}

.card-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* Cycle steps with connecting arrows */
.cycle-step .step-arrow {
  font-family: var(--font-mono);
  color: var(--cobalt);
  font-size: 1.2rem;
}

/* Architecture layers */
.layer-list {
  margin-top: var(--space-lg);
  border-top: 1px solid var(--rule);
}

.layer-item {
  display: grid;
  grid-template-columns: 5rem 1fr 2fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}

.layer-num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--cobalt);
  font-weight: 600;
}

.layer-name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
}

.layer-desc {
  font-size: 0.95rem;
  color: var(--muted);
}

.layer-item.cross-cutting {
  background: rgba(0, 71, 255, 0.04);
  border-left: 2px solid var(--cobalt);
  padding-left: var(--space-sm);
}

/* Use-case grid */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.usecase {
  border-top: 2px solid var(--ink);
  padding-top: var(--space-sm);
}

.usecase h4 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.usecase p {
  font-size: 0.9rem;
  color: var(--muted);
}

/* Feature / editorial card */
.editorial-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  border: 1px solid var(--rule);
  padding: var(--space-lg);
}

.editorial-right {
  border-left: 1px solid var(--rule);
  padding-left: var(--space-lg);
}

.editorial-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--ink);
  margin-bottom: var(--space-sm);
  display: inline-block;
  font-weight: 600;
}

.editorial-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.editorial-desc {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: var(--space-md);
}

.editorial-link {
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  font-size: 0.9rem;
  background: linear-gradient(180deg, transparent 65%, var(--acid) 65%);
}

.editorial-kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--space-sm);
}

.editorial-quote {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  line-height: 1.5;
}

/* Pillars */
.pillar h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--cobalt);
  margin-bottom: 0.5rem;
}

.pillar h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pillar p {
  font-size: 0.9rem;
  color: var(--muted);
}

/* SDG chips */
.sdg-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-md);
}

.sdg-chips .chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  color: #fff;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.team-member img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.4s ease;
  display: block;
  margin-bottom: var(--space-sm);
}

.team-member:hover img { filter: grayscale(0%); }

.team-member h3 {
  font-size: 1.35rem;
  margin-bottom: 0.2rem;
}

.team-member .role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cobalt);
  margin-bottom: 0.6rem;
}

.team-member p.bio {
  font-size: 0.9rem;
  color: var(--muted);
}

.team-roles {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--muted);
}

.team-roles a { text-decoration: underline; text-decoration-color: var(--rule); }

/* Forms (Engage + newsletter) */
.intake-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.8rem 0;
  margin-bottom: var(--space-md);
  outline: none;
  border-radius: 0;
  transition: border-color 0.3s ease;
}

.intake-input:focus { border-color: var(--cobalt); }
body.theme-dark .intake-input:focus { border-color: var(--acid); }

.intake-input::placeholder { color: var(--muted); }

select.intake-input { appearance: none; }
select.intake-input option { background-color: var(--bg); color: var(--ink); }

textarea.intake-input { resize: vertical; min-height: 6rem; }

.form-status {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-top: var(--space-sm);
  min-height: 1.2rem;
}

.form-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: -0.8rem;
  margin-bottom: var(--space-md);
}

.form-note a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Newsletter band */
.newsletter-band {
  background-color: var(--ink);
  color: var(--bg);
  padding: var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  margin: var(--space-xl) 0;
}

body.theme-dark .newsletter-band {
  background-color: transparent;
  border: 1px solid var(--rule);
  color: var(--ink);
}

.newsletter-band h3 {
  font-size: 1.5rem;
  margin-bottom: 0.4rem;
}

.newsletter-band p {
  font-size: 0.9rem;
  opacity: 0.7;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.newsletter-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.newsletter-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(244, 244, 240, 0.35);
  color: var(--bg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.8rem 0;
  outline: none;
  border-radius: 0;
}

.newsletter-form input[type="email"]::placeholder { color: rgba(244, 244, 240, 0.45); }
.newsletter-form input[type="email"]:focus { border-color: var(--acid); }

.newsletter-form .cta-button {
  background-color: var(--acid);
  color: #111111;
}

.newsletter-form .cta-button:hover {
  background-color: #F4F4F0;
  color: #111111;
}

.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  opacity: 0.75;
  cursor: pointer;
}

.consent-row input[type="checkbox"] {
  margin-top: 0.2rem;
  accent-color: var(--acid);
  flex-shrink: 0;
}

.consent-row a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.newsletter-alt {
  margin-top: var(--space-sm);
}

.newsletter-alt a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Brief / article pages */
.article {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.article h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: var(--space-md);
}

.article h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.article p {
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
  line-height: 1.75;
}

.article ul {
  margin: 0 0 var(--space-sm) 1.2rem;
  line-height: 1.75;
  font-size: 1.05rem;
}

.article li { margin-bottom: 0.4rem; }

.article .summary {
  font-size: 1.2rem;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--cobalt);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
}

.article .pullquote {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.5;
  margin: var(--space-lg) 0;
  padding-top: var(--space-md);
  border-top: 2px solid var(--ink);
}

/* Figures & tables (brief pages) */
.figure {
  margin: var(--space-lg) 0;
}

.figure svg {
  width: 100%;
  height: auto;
  display: block;
}

.figure .figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 0.75rem;
}

.fig-box {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
}

.fig-box-accent {
  fill: var(--ink);
  stroke: none;
}

.fig-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  fill: var(--cobalt);
}

.fig-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  fill: var(--ink);
}

.fig-title-inverse {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  fill: var(--bg);
}

.fig-desc {
  font-family: var(--font-body);
  font-size: 11.5px;
  fill: var(--muted);
}

.fig-arrow {
  stroke: var(--cobalt);
  stroke-width: 1.5;
  fill: none;
}

.fig-arrowhead {
  fill: var(--cobalt);
}

/* Icons & line-drawing devices
   Line icons live in the shared sprite (see site/assets/icons.svg for the
   canonical copy; pages paste the <symbol> block inline at the top of <body>
   and reference icons with <use href="#ic-name">). Stroke rules ride as
   attributes on each <symbol> because document CSS cannot reach inside <use>
   shadow DOM; accent/spark shapes carry inline style with CSS variables,
   which do cross the boundary. 48x48 grid, 1.5 stroke, square caps. */
.icon {
  width: 2.5rem;
  height: 2.5rem;
  display: block;
  color: var(--ink);
  --ic-accent: var(--cobalt);
}

body.theme-dark .icon { --ic-accent: var(--acid); }

.icon-sm { width: 1.25rem; height: 1.25rem; }
.icon-lg { width: 3.5rem; height: 3.5rem; }

/* Card with an icon above the label */
.card .icon { margin-bottom: var(--space-sm); }
.card:hover .icon { color: var(--cobalt); }
body.theme-dark .card:hover .icon { color: var(--acid); }

/* Usecase / pillar rows with a small leading icon */
.usecase .icon, .pillar .icon {
  width: 1.75rem;
  height: 1.75rem;
  margin-bottom: 0.6rem;
}

/* Square marker prefix for kickers (brand accent square, from the favicon) */
.kicker-mark::before {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  background: currentColor;
  margin-right: 0.6em;
}

/* Registration frame: hairline border with solid corner handles;
   bottom-right handle is acid — the brand mark's accent square. */
.reg-frame {
  position: relative;
  border: 1px solid var(--ink);
  padding: var(--space-lg);
}

.reg-mark {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--ink);
}

.reg-mark.tl { top: -5px; left: -5px; }
.reg-mark.tr { top: -5px; right: -5px; }
.reg-mark.bl { bottom: -5px; left: -5px; }
.reg-mark.br { bottom: -5px; right: -5px; background: var(--acid); }

/* Dot field: pure-CSS halftone texture, no raster asset */
.dot-field {
  background-image: radial-gradient(var(--rule) 1.5px, transparent 1.5px);
  background-size: 14px 14px;
}

.dot-field-fade {
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 25%, #000 75%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0%, #000 25%, #000 75%, transparent 100%);
}

.dot-field .reg-frame { background: var(--bg); }

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
  font-size: 0.9rem;
}

.article th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: left;
  color: var(--muted);
  border-bottom: 2px solid var(--ink);
  padding: 0.6rem 1rem 0.6rem 0;
}

.article td {
  border-bottom: 1px solid var(--rule);
  padding: 0.7rem 1rem 0.7rem 0;
  vertical-align: top;
  line-height: 1.5;
}

.article td:first-child {
  font-weight: 600;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .article td:first-child { white-space: normal; }
  .article table { font-size: 0.8rem; }
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: var(--space-xl);
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Responsive */
@media (max-width: 900px) {
  .col-8, .col-6, .col-4, .col-3 { grid-column: span 12; }

  .layer-item {
    grid-template-columns: 3.5rem 1fr;
  }

  .layer-desc {
    grid-column: 2;
  }

  .editorial-card {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }

  .editorial-right {
    border-left: none;
    border-top: 1px solid var(--rule);
    padding-left: 0;
    padding-top: var(--space-md);
  }

  .newsletter-band {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }
}

@media (max-width: 600px) {
  :root {
    --space-xl: 3rem;
    --space-lg: 2rem;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem var(--space-md);
  }

  .hero { min-height: auto; }

  .hero-actions .cta-button {
    width: 100%;
    text-align: center;
  }
}