/* Artifact Index — Helvetica Now Display (body/display), Fragment Mono (captions/aux). */
/* Helvetica Now Display: add Regular .woff2/.woff to /fonts/; Fragment Mono loaded via <link> in HTML. */
@font-face {
  font-family: 'Helvetica Now Display';
  src: local('Helvetica Now Display'), local('HelveticaNowDisplay-Regular'),
       url('fonts/HelveticaNowDisplay-Regular.woff2') format('woff2'),
       url('fonts/HelveticaNowDisplay-Regular.woff') format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Helvetica Now Display';
  src: local('Helvetica Now Display Light'), local('HelveticaNowDisplay-Light'),
       url('fonts/HelveticaNowDisplay-Light.woff2') format('woff2'),
       url('fonts/HelveticaNowDisplay-Light.woff') format('woff');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

/* Fragment Mono — fetched from Fontsource CDN (regular only, roman/light) */
@font-face {
  font-family: 'Fragment Mono';
  font-style: normal;
  font-display: swap;
  font-weight: 400;
  src: url('https://cdn.jsdelivr.net/fontsource/fonts/fragment-mono@latest/latin-400-normal.woff2') format('woff2');
}

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

:root {
  --bg: #0c0c0d;
  --surface: #141416;
  --surface-elevated: #1a1a1d;
  --border: #2a2a2e;
  --border-focus: #3f3f45;
  --text: #ededef;
  --text-secondary: #9898a0;
  --text-tertiary: #6b6b72;
  --font-display: 'Helvetica Now Display', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-caption: 'Fragment Mono', ui-monospace, monospace;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --header-h: 52px;
  --toolbar-h: 48px;
}

body {
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.4;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.logo-block {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.logo {
  font-family: var(--font-caption);
  font-size: 12px;
  font-weight: 400;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
}
.logo:hover { color: var(--text-secondary); }
.logo-sub {
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-top: 1px;
}

.search-wrap {
  flex: 1;
  max-width: 480px;
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  height: 36px;
  padding: 0 var(--space-4) 0 12px;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0;
  outline: none;
  transition: border-color 0.12s ease;
}
.search-input::placeholder { color: var(--text-tertiary); }
.search-input:hover { border-color: var(--border-focus); }
.search-input:focus { border-color: var(--border-focus); }

.search-clear {
  position: absolute;
  right: 10px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  color: var(--text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
}
.search-clear:hover { color: var(--text); }

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-link {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: -1px;
  color: var(--text-secondary);
  text-decoration: none;
}
.header-link:hover { color: var(--text); }

/* ---- Ecosystem nav ---- */
.eco-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.eco-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  text-decoration: none;
  padding: var(--space-1) var(--space-3);
  border: 1px solid transparent;
  transition: border-color 0.12s, background 0.12s;
}
.eco-nav-item:hover {
  border-color: var(--border);
  background: var(--surface-elevated);
}
.eco-nav-item--active {
  border-color: var(--border);
  background: var(--surface-elevated);
}

.eco-nav-label {
  font-family: var(--font-caption);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  color: var(--text);
}
.eco-nav-desc {
  font-family: var(--font-caption);
  font-size: 8px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.eco-nav-arrow {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ---- Ecosystem sections ---- */
.eco-section {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.eco-section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.eco-section-heading {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 400;
  color: var(--text);
}

.eco-section-sub {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.eco-section-desc {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 60ch;
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

.eco-section-cta {
  margin-top: var(--space-2);
}

.eco-link {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  transition: background 0.12s, border-color 0.12s;
}
.eco-link:hover {
  background: var(--surface-elevated);
  border-color: var(--border-focus);
}

/* ---- Nodes grid ---- */
.nodes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.node-card {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: border-color 0.12s ease, background 0.12s ease;
}
.node-card:hover {
  border-color: var(--border-focus);
  background: var(--surface-elevated);
}

.node-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.node-id {
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.node-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 400;
  color: var(--text);
  margin-bottom: var(--space-1);
}

.node-role {
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ---- Toolbar ---- */
.toolbar {
  height: var(--toolbar-h);
  padding: 0 var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.filter-label {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.filter-chips {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.chip {
  padding: 6px 12px;
  font-family: var(--font-caption);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: color 0.12s, background 0.12s, border-color 0.12s;
}
.chip--filter:hover {
  color: var(--text);
  background: var(--surface-elevated);
}
.chip--filter.chip--active {
  color: var(--text);
  background: var(--surface-elevated);
  border-color: var(--border);
}

.result-meta {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.view-toggle {
  display: flex;
  gap: var(--space-1);
}
.view-toggle .chip--active { color: var(--text); background: var(--surface-elevated); border-color: var(--border); }

/* ---- Main ---- */
.main {
  padding: var(--space-5);
  min-height: calc(100vh - var(--header-h) - var(--toolbar-h) - 60px);
}
.main--page {
  min-height: calc(100vh - var(--header-h) - 60px);
}

.view-label {
  display: block;
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

/* ---- Overview header (grid view) ---- */
.overview-header {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: baseline;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.overview-header--hidden { display: none; }

.overview-work {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 400;
  color: var(--text);
}

.overview-title {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.overview-meta {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.overview-range {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ---- List view ---- */
.artifact-list {
  list-style: none;
}
.artifact-list--hidden { display: none; }

.artifact-list-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display);
  color: var(--text);
  text-decoration: none;
  outline: none;
}
.artifact-list-link:hover { color: var(--text-secondary); }
.artifact-list-link:focus-visible { background: var(--surface); }

.artifact-list-thumb {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
}
.artifact-list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.artifact-list-title {
  font-size: 14px;
  flex: 1;
}

.artifact-list-type {
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* ---- Grid view ---- */
.artifact-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-5);
}
@media (min-width: 900px) {
  .artifact-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-5);
  }
}
.artifact-grid--hidden { display: none; }

.artifact-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: transparent;
  transition: background 0.12s ease;
}
.artifact-card:hover {
  background: var(--surface);
}
.artifact-card:hover .artifact-actions { opacity: 1; }

.artifact-thumb-link {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 140px;
  margin: 0 auto;
}

.artifact-thumb {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--surface);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
}

.artifact-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.artifact-thumb-inner {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-caption);
  font-size: 9px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.artifact-actions {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity 0.12s ease;
  border-radius: 50%;
}

.artifact-actions .btn {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-caption);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  cursor: pointer;
  text-decoration: none;
}
.artifact-actions .btn:hover {
  background: var(--border-focus);
}
.artifact-actions .btn-copy {
  appearance: none;
}

.artifact-body {
  padding: var(--space-3) var(--space-2) 0;
  position: relative;
  z-index: 1;
  width: 100%;
}

.artifact-title-text {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 2px;
  color: var(--text);
}

.artifact-meta {
  font-family: var(--font-caption);
  font-size: 9px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ---- ATLAS section ---- */
.atlas-section {
  padding: var(--space-5);
  border-top: 1px solid var(--border);
}

.atlas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
}

.atlas-card {
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: border-color 0.12s ease, background 0.12s ease;
}
.atlas-card:hover {
  border-color: var(--border-focus);
  background: var(--surface-elevated);
}

.atlas-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.atlas-code {
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.atlas-status {
  font-family: var(--font-caption);
  font-size: 9px;
  text-transform: uppercase;
  padding: 2px 6px;
  border: 1px solid var(--border);
}
.atlas-status--active {
  color: #6ee7a0;
  border-color: #2a5a3a;
}
.atlas-status--archived {
  color: var(--text-tertiary);
}

.atlas-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 400;
  color: var(--text);
  margin-bottom: var(--space-1);
}

.atlas-format {
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.atlas-desc {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.atlas-location {
  font-family: var(--font-caption);
  font-size: 9px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

/* ---- Empty state ---- */
.empty-state {
  padding: var(--space-8) var(--space-5);
  text-align: center;
}
.empty-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.empty-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---- Footer ---- */
.footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-caption);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-tertiary);
}
.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}
.footer a:hover { color: var(--text); }
.footer-links { display: flex; gap: var(--space-4); }

.keyboard-hint {
  margin: 0;
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-caption);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-tertiary);
  text-align: center;
}

/* ---- Static pages (About, Contact) ---- */
.page-content {
  padding: var(--space-6) var(--space-5);
  max-width: 56ch;
}
.page-content h1 {
  font-family: var(--font-caption);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}
.page-content p {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: var(--space-4);
}
.page-content a {
  color: var(--text-secondary);
  text-decoration: none;
}
.page-content a:hover { color: var(--text); }
.page-cta {
  display: inline-block;
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-caption);
  font-size: 12px;
  font-weight: 400;
  text-transform: uppercase;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
}
.page-cta:hover {
  background: var(--surface-elevated);
  color: var(--text);
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .header {
    flex-wrap: wrap;
    height: auto;
    padding: var(--space-3) var(--space-4);
    gap: var(--space-3);
  }
  .search-wrap { max-width: none; order: 3; width: 100%; }
  .toolbar {
    flex-wrap: wrap;
    height: auto;
    padding: var(--space-3) var(--space-4);
  }
  .filter-chips { flex-wrap: wrap; }
  .artifact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .atlas-grid {
    grid-template-columns: 1fr;
  }
  .nodes-grid {
    grid-template-columns: 1fr;
  }
  .eco-nav {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .eco-nav-arrow {
    display: none;
  }
}