/* ============================================================
   UK Neuromorphic — design tokens

   Palette sampled directly from the four provided logo files:
   - anchor:    NeuroSYNC wordmark / dark end of its brain-mark gradient
   - companion: magenta end of NeuroWare's icon gradient — chosen over the
                gradient's blue-purple midpoint, which read too close to
                anchor; the magenta end keeps both initiatives logo-true
                while staying visually distinct
   - accent:    NeuMat's cyan mark, deepened for AA text contrast
                (bright variant kept for decorative-only use)
   ============================================================ */

:root {
  --color-anchor: #423E8C;
  --color-companion: #A85BA3;
  --color-accent: #007A6E;
  --color-accent-bright: #00D9C0;
  --color-ink: #191830;
  --color-paper: #F8F7FB;
  --color-paper-card: #FFFFFF;
  --color-hair: #E4E1EE;
  --color-mono: #625F78;

  /* Pale card tints — tints of the accent/anchor, not new hues.
     Applied only to the card grids, not full section backgrounds. */
  --color-events-card: #EBF6F4;
  --color-events-hair: rgba(0, 122, 110, 0.16);
  --color-resources-card: #F0EFF8;
  --color-resources-hair: rgba(66, 62, 140, 0.16);

  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  --max-width: 1120px;
  --gutter: clamp(20px, 5vw, 48px);
  --radius: 4px;
}

/* ============================================================
   Reset & base
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }

ul { list-style: none; margin: 0; padding: 0; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: #fff;
  padding: 12px 20px;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.kicker {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 12px;
}

/* ============================================================
   Reveal-on-scroll (progressive enhancement)
   Default state is fully visible; JS arms the hidden state only
   when it can also animate it back in, respecting reduced motion.
   ============================================================ */

[data-reveal] { opacity: 1; transform: none; }

html.reveal-armed [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
html.reveal-armed [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html.reveal-armed [data-reveal] {
    transition: none;
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   Header / nav
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 247, 251, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-hair);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: clamp(14px, 3vw, 32px);
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-mono);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-accent);
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  padding: clamp(56px, 9vw, 104px) 0 clamp(40px, 6vw, 72px);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(34px, 5.2vw, 56px);
  color: var(--color-ink);
  margin-bottom: 20px;
}

.subhead {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--color-mono);
  max-width: 46ch;
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: var(--radius);
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: #005D53;
}

.hero-visual {
  position: relative;
  color: var(--color-mono);
  max-width: 420px;
  margin: 0 auto;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: -18%;
  z-index: -1;
  background:
    radial-gradient(closest-side, var(--color-accent-bright) 0%, transparent 70%),
    radial-gradient(closest-side at 68% 72%, var(--color-anchor) 0%, transparent 70%);
  opacity: 0.3;
  filter: blur(44px);
  pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-visual::before {
    animation: glow-pulse 7s ease-in-out infinite alternate;
  }
}

@keyframes glow-pulse {
  from { opacity: 0.22; }
  to   { opacity: 0.38; }
}

.venn { width: 100%; height: auto; position: relative; }

.venn-circle {
  fill-opacity: 0.6;
  mix-blend-mode: multiply;
  stroke: none;
}
.venn-circle--sync { fill: var(--color-anchor); }
.venn-circle--mat  { fill: var(--color-accent-bright); }
.venn-circle--ware { fill: var(--color-companion); }

.venn-map, .venn-ni { color: var(--color-mono); }

/* Draw-in: only engages once html.reveal-armed is present */
html.reveal-armed .venn-circle {
  opacity: 0;
  transform: scale(0.85);
  transform-origin: center;
  transition: opacity 0.9s ease, transform 0.9s ease;
}
html.reveal-armed .venn-circle--mat  { transition-delay: 0.12s; }
html.reveal-armed .venn-circle--ware { transition-delay: 0.24s; }
html.reveal-armed .hero-visual.is-visible .venn-circle {
  opacity: 0.6;
  transform: scale(1);
}

html.reveal-armed .venn-map, html.reveal-armed .venn-ni {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  transition: stroke-dashoffset 1.6s ease;
}
html.reveal-armed .hero-visual.is-visible .venn-map,
html.reveal-armed .hero-visual.is-visible .venn-ni {
  stroke-dashoffset: 0;
}

@media (prefers-reduced-motion: reduce) {
  html.reveal-armed .venn-circle,
  html.reveal-armed .venn-map,
  html.reveal-armed .venn-ni {
    transition: none;
    opacity: 0.6;
    transform: none;
    stroke-dashoffset: 0;
  }
  html.reveal-armed .venn-map, html.reveal-armed .venn-ni { opacity: 1; }
}

/* ============================================================
   Why it matters
   ============================================================ */

.why {
  position: relative;
  overflow: hidden;
  padding: clamp(8px, 2vw, 16px) 0 clamp(56px, 8vw, 96px);
}

.why-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
  pointer-events: none;
  z-index: 0;
}

.why .section-inner {
  position: relative;
  z-index: 1;
}

.prose {
  max-width: 72ch;
  margin: 0 auto;
  padding: 0 var(--gutter);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.65;
  color: var(--color-ink);
}

/* ============================================================
   Ecosystem
   ============================================================ */

.ecosystem {
  padding: clamp(56px, 8vw, 96px) 0;
  background: var(--color-paper-card);
  border-top: 1px solid var(--color-hair);
  border-bottom: 1px solid var(--color-hair);
}

.ecosystem h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  margin-bottom: 40px;
  max-width: 30ch;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-paper);
  border: 1px solid var(--color-hair);
  border-radius: var(--radius);
  padding: 28px 26px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-logo-frame {
  height: 52px;
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}

.card-logo {
  height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  object-position: left center;
}

.card .eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0;
}

.card h3 {
  font-size: 20px;
  margin: 0;
}

.card-body {
  font-size: 14.5px;
  color: var(--color-mono);
  line-height: 1.6;
  flex-grow: 1;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-ink);
  border-top: 1px solid var(--color-hair);
  padding-top: 14px;
  margin-top: 4px;
  transition: color 0.15s ease;
}
.card-link:hover { color: var(--color-accent); }

.unifying-line {
  max-width: 62ch;
  margin: 40px auto 0;
  text-align: center;
  color: var(--color-mono);
  font-size: 15px;
  line-height: 1.6;
}

.ecosystem-funder {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 20px auto 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-mono);
}

.ecosystem-funder-logo {
  height: 22px;
  width: auto;
  object-fit: contain;
}

/* ============================================================
   Network map
   ============================================================ */

.network {
  padding: clamp(56px, 8vw, 96px) 0;
}

.network h2 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 12px;
  max-width: 34ch;
}

.section-intro {
  color: var(--color-mono);
  font-size: 15px;
  max-width: 58ch;
  margin-bottom: 32px;
}

.network-map {
  position: relative;
  z-index: 0; /* keep Leaflet's panes under the sticky header */
  font-family: var(--font-body);
  height: clamp(380px, 56vw, 540px);
  border: 1px solid var(--color-hair);
  border-radius: var(--radius);
  background: #EEF0F3;
  z-index: 0;
}

/* Greyscale base map so the coloured markers carry the meaning. */
.network-map .leaflet-tile-pane {
  filter: grayscale(1) brightness(1.04) contrast(0.92);
}

.network-map > .events-status {
  padding: 24px;
}

.network-map .leaflet-popup-content-wrapper {
  border-radius: var(--radius);
  font-family: var(--font-body);
}

.network-map .leaflet-popup-content {
  margin: 14px 16px;
  font-size: 13.5px;
  line-height: 1.5;
}

.map-popup-org + .map-popup-org {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-hair);
}

.map-popup-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.3;
  color: var(--color-ink);
}

.map-popup-type {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-mono);
  margin-top: 2px;
}

.map-popup-specialisms {
  color: var(--color-mono);
  margin-top: 6px;
}

.network-map .map-popup-link {
  display: inline-block;
  margin-top: 6px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}
.network-map .map-popup-link:hover { text-decoration: underline; }

.network-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: 16px;
  font-size: 14.5px;
  color: var(--color-mono);
}

.network-legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--color-hair);
}

.network-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-hair);
}

.network-credit {
  font-size: 14.5px;
  color: var(--color-mono);
}

.network-cta {
  flex-shrink: 0;
}
.network-credit a { color: var(--color-ink); }
.network-credit a:hover { color: var(--color-accent); }

.network-list {
  margin-top: 28px;
}

.network-list .events-past-date {
  order: 2;
  min-width: 0;
  text-transform: uppercase;
}

/* ============================================================
   News
   ============================================================ */

.news {
  padding: clamp(56px, 8vw, 96px) 0;
  background: var(--color-paper-card);
  border-top: 1px solid var(--color-hair);
  border-bottom: 1px solid var(--color-hair);
}

.news h2 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 32px;
}

.news-list {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.news-list li + li {
  border-top: 1px solid var(--color-hair);
}

.news-list a {
  display: block;
  padding: 12px 0;
  text-decoration: none;
  color: var(--color-ink);
  transition: color 0.15s ease;
}
.news-list a:hover { color: var(--color-accent); }

.news-date {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-mono);
  margin-bottom: 2px;
}

.news-title {
  display: block;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.45;
}

.news-status {
  font-size: 14px;
  color: var(--color-mono);
  padding: 12px 0;
}

/* ============================================================
   Events
   ============================================================ */

.events {
  padding: clamp(56px, 8vw, 96px) 0;
}

.events h2 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 32px;
}

.resource-card .event-date {
  display: inline-block;
  flex-grow: 0;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(0, 122, 110, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  margin: 0 0 2px;
}

.events-status {
  grid-column: 1 / -1;
  color: var(--color-mono);
  font-size: 14.5px;
  padding: 8px 0;
}

.events-past {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-hair);
}

.events-past-toggle {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-mono);
  user-select: none;
}
.events-past-toggle::-webkit-details-marker { display: none; }
.events-past-toggle::before {
  content: "→";
  display: inline-block;
  color: var(--color-accent);
  transition: transform 0.15s ease;
}
.events-past[open] .events-past-toggle::before {
  transform: rotate(90deg);
}
.events-past-toggle:hover {
  color: var(--color-accent);
}

.events-past-list {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
}

.events-past-row {
  border-top: 1px solid var(--color-hair);
}
.events-past-row:last-child {
  border-bottom: 1px solid var(--color-hair);
}

.events-past-row a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 4px;
  text-decoration: none;
  color: var(--color-ink);
  transition: color 0.15s ease;
}
.events-past-row a:hover {
  color: var(--color-accent);
}

.events-past-date {
  flex: 0 0 auto;
  min-width: 13ch;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-mono);
}

.events-past-title {
  flex: 1 1 auto;
  font-size: 14.5px;
}

/* ============================================================
   Resources
   ============================================================ */

.resources {
  padding: clamp(56px, 8vw, 96px) 0;
  background: var(--color-paper-card);
  border-top: 1px solid var(--color-hair);
  border-bottom: 1px solid var(--color-hair);
}

.resources h2 {
  font-size: clamp(24px, 3vw, 30px);
  margin-bottom: 32px;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.resource-card {
  border: 1px solid var(--color-hair);
  border-radius: var(--radius);
  background: var(--color-paper);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.events .resource-card {
  background: var(--color-events-card);
  border-color: var(--color-events-hair);
  border-left: 3px solid var(--color-accent);
}

.resources .resource-card {
  background: var(--color-resources-card);
  border-color: var(--color-resources-hair);
  border-left: 3px solid var(--color-anchor);
}

.resources .resource-card--ware {
  border-left-color: var(--color-companion);
}

.resource-card .resource-lead {
  display: inline-block;
  flex-grow: 0;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-anchor);
  background: rgba(66, 62, 140, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  margin: 0 0 2px;
}

.resource-card .resource-lead--ware {
  color: var(--color-companion);
  background: rgba(168, 91, 163, 0.14);
}

.resource-card h3 {
  font-size: 17px;
  line-height: 1.3;
}

.resource-card p {
  color: var(--color-mono);
  font-size: 14px;
  flex-grow: 1;
}

.resource-link {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--color-accent);
}
.resource-link:hover { text-decoration: underline; }

.resources .resource-link {
  color: var(--color-anchor);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  padding: clamp(48px, 7vw, 80px) 0 40px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.footer-line {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 600;
  max-width: 34ch;
  flex: 1 1 320px;
}

.footer-top .btn {
  flex-shrink: 0;
}

.footer-brands {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  padding-top: 28px;
  border-top: 1px solid var(--color-hair);
  margin-bottom: 28px;
}

.footer-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.funder-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.funder-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-mono);
}

.funder-logo {
  height: 56px;
  width: auto;
  object-fit: contain;
}

.copyright {
  font-size: 13px;
  color: var(--color-mono);
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    max-width: 320px;
    order: -1;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .nav {
    padding: 14px var(--gutter);
  }
  .nav-links {
    gap: 12px;
    font-size: 13px;
  }
  .nav-links a {
    font-size: 13px;
  }
  .hero {
    padding-top: 40px;
  }
  .footer-brands {
    gap: 20px;
  }
  .footer-logo {
    height: 26px;
  }
  .funder-logo {
    height: 40px;
  }
}

@media (max-width: 380px) {
  .nav-links {
    gap: 10px;
  }
}