/* Data Initiatives Atlas — interactive graph
   Hand-written, no framework, no build step. Theme-aware, mobile-first. */

:root {
  --bg:            #f6f7f9;
  --surface:       #ffffff;
  --surface-2:     #eef0f4;
  --border:        #d3d8e0;
  --border-strong: #b3bac6;
  --text:          #16191f;
  --text-dim:      #545c6b;
  --accent:        #1c5fd6;
  --accent-weak:   #dbe6fb;
  --focus:         #b8541f;
  --danger:        #a32020;

  /* Entity-level colours. Chosen for contrast in both themes and for
     distinguishability without relying on hue alone (shapes vary too). */
  --lvl-international: #7b4fbd;
  --lvl-regional:      #1668b8;
  --lvl-national:      #1b7f5e;
  --lvl-subnational:   #6f8f2a;
  --lvl-sectoral:      #b3701a;
  --lvl-local:         #99562c;

  --topbar-h: 3.5rem;
  --sidebar-w: 20rem;
  --detail-w: 24rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:            #14161a;
    --surface:       #1c1f25;
    --surface-2:     #24282f;
    --border:        #333943;
    --border-strong: #4a5260;
    --text:          #e8eaee;
    --text-dim:      #a2abb9;
    --accent:        #6ea3f5;
    --accent-weak:   #1e3556;
    --focus:         #f0a267;
    --danger:        #f08a8a;
    --lvl-international: #b48ce8;
    --lvl-regional:      #63a9ec;
    --lvl-national:      #59c7a0;
    --lvl-subnational:   #a8c95c;
    --lvl-sectoral:      #e3ac5e;
    --lvl-local:         #e0a184;
  }
}

:root[data-theme="dark"] {
  --bg:            #14161a;
  --surface:       #1c1f25;
  --surface-2:     #24282f;
  --border:        #333943;
  --border-strong: #4a5260;
  --text:          #e8eaee;
  --text-dim:      #a2abb9;
  --accent:        #6ea3f5;
  --accent-weak:   #1e3556;
  --focus:         #f0a267;
  --danger:        #f08a8a;
  --lvl-international: #b48ce8;
  --lvl-regional:      #63a9ec;
  --lvl-national:      #59c7a0;
  --lvl-subnational:   #a8c95c;
  --lvl-sectoral:      #e3ac5e;
  --lvl-local:         #e0a184;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0; height: 100%;
  background: var(--bg); color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

body { display: flex; flex-direction: column; overflow: hidden; }

a { color: var(--accent); }
a:hover { text-decoration: none; }

:where(button, input, select, a, [tabindex]):focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 3px;
}

.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(--surface); color: var(--text);
  padding: .6rem 1rem; border: 2px solid var(--accent);
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* ───────────────────────── topbar ───────────────────────── */

.topbar {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: .75rem;
  padding: .5rem .75rem;
  min-height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: .5rem; min-width: 0; }
.brand-mark { font-size: 1.4rem; line-height: 1; }
.topbar h1 { font-size: 1rem; margin: 0; white-space: nowrap; }
.brand-sub { margin: 0; font-size: .74rem; color: var(--text-dim); white-space: nowrap; }

.search-wrap { position: relative; flex: 1 1 14rem; min-width: 10rem; }

#search {
  width: 100%; padding: .5rem .7rem;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 6px;
  font-size: .9rem;
}

#suggestions {
  position: absolute; z-index: 40; top: calc(100% + 4px); left: 0; right: 0;
  margin: 0; padding: .25rem; list-style: none;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,.22);
  max-height: min(60vh, 24rem); overflow-y: auto;
}
#suggestions li { padding: .45rem .55rem; border-radius: 5px; cursor: pointer; }
#suggestions li[aria-selected="true"], #suggestions li:hover { background: var(--accent-weak); }
#suggestions .s-name { display: block; font-weight: 600; font-size: .88rem; }
#suggestions .s-meta { display: block; font-size: .74rem; color: var(--text-dim); }
#suggestions .s-empty { color: var(--text-dim); cursor: default; }
#suggestions .s-empty:hover { background: none; }

.views { display: flex; gap: .25rem; }

.view-btn, .icon-btn, .secondary, .mini {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 6px;
  padding: .45rem .7rem; font-size: .84rem; cursor: pointer;
  font-family: inherit;
}
.view-btn:hover, .icon-btn:hover, .secondary:hover, .mini:hover { border-color: var(--accent); }
.view-btn.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

#filters-toggle { display: none; }

/* ───────────────────────── layout ───────────────────────── */

/* overflow-x: a flex child wider than the viewport (the comparison matrix on
   a phone) otherwise pushes the document itself sideways. Horizontal
   scrolling belongs to the element that is too wide — .table-wrap — not to
   the page. `body` already carries the same guard. */
.layout { flex: 1 1 auto; display: flex; min-height: 0; position: relative; overflow-x: hidden; }

.sidebar {
  flex: 0 0 var(--sidebar-w); width: var(--sidebar-w);
  background: var(--surface); border-right: 1px solid var(--border);
  overflow-y: auto; overscroll-behavior: contain;
}
.sidebar-inner { padding: .75rem; }

.panel { margin-bottom: 1.1rem; }
.panel h2 {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-dim); margin: 0 0 .5rem;
}

.hint { font-size: .8rem; color: var(--text-dim); margin: 0 0 .6rem; }

.stats { display: grid; grid-template-columns: 1fr auto; gap: .18rem .5rem; margin: 0; font-size: .84rem; }
.stats dt { color: var(--text-dim); }
.stats dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.generated { font-size: .74rem; color: var(--text-dim); margin: .6rem 0 0; }

.sub { border-top: 1px solid var(--border); padding: .4rem 0; }
.sub > summary {
  cursor: pointer; font-size: .85rem; font-weight: 600;
  padding: .2rem 0; list-style-position: inside;
}
.sub .count { color: var(--text-dim); font-weight: 400; font-size: .78rem; }

.checks { display: flex; flex-direction: column; gap: .1rem; padding: .35rem 0; }
.checks.scroll { max-height: 15rem; overflow-y: auto; }

.check {
  display: flex; align-items: center; gap: .45rem;
  font-size: .84rem; padding: .18rem .25rem; border-radius: 4px; cursor: pointer;
}
.check:hover { background: var(--surface-2); }
.check input { margin: 0; flex: 0 0 auto; accent-color: var(--accent); }
.check .cname { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; }
.check .cnum { color: var(--text-dim); font-size: .76rem; font-variant-numeric: tabular-nums; }
.check .swatch {
  width: .7rem; height: .7rem; border-radius: 50%; flex: 0 0 auto;
  border: 1px solid rgba(128,128,128,.5);
}

.btn-row { display: flex; gap: .35rem; padding-top: .3rem; }
.mini { padding: .22rem .5rem; font-size: .76rem; }
.secondary { width: 100%; margin-top: .5rem; }

.field { display: block; font-size: .82rem; }
.field span { display: block; margin-bottom: .25rem; color: var(--text-dim); }
.field select {
  width: 100%; padding: .4rem; font-size: .85rem; font-family: inherit;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 5px;
}

.legend { list-style: none; margin: 0; padding: 0; font-size: .8rem; }
.legend li { display: flex; align-items: center; gap: .45rem; padding: .12rem 0; }
.legend .swatch { width: .8rem; height: .8rem; border-radius: 50%; border: 1px solid rgba(128,128,128,.5); }
.legend .shape { font-size: .95rem; width: 1rem; text-align: center; }

/* ───────────────────────── stage ───────────────────────── */

.stage { flex: 1 1 auto; position: relative; min-width: 0; background: var(--bg); }
#cy { position: absolute; inset: 0; }

.stage-overlay {
  position: absolute; inset: 0; z-index: 20;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: .75rem; text-align: center; padding: 1.5rem;
  background: var(--bg);
}
.stage-overlay[hidden] { display: none; }
.stage-overlay h2 { margin: 0; font-size: 1.05rem; color: var(--danger); }
.stage-overlay p { margin: 0; color: var(--text-dim); max-width: 32rem; }

.spinner {
  width: 2rem; height: 2rem; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }

.stage-controls {
  position: absolute; z-index: 15; right: .6rem; bottom: .6rem;
  display: flex; flex-direction: column; gap: .3rem;
}
.stage-controls .icon-btn { min-width: 2.4rem; padding: .4rem; }

.stage-status {
  position: absolute; z-index: 15; left: .6rem; bottom: .6rem;
  font-size: .76rem; color: var(--text-dim);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  padding: .25rem .5rem; border-radius: 5px; border: 1px solid var(--border);
  max-width: calc(100% - 5rem);
}

.empty-note {
  position: absolute; z-index: 16; inset: auto 0 50% 0; text-align: center;
  color: var(--text-dim); font-size: .9rem;
}
.linklike {
  background: none; border: none; color: var(--accent);
  text-decoration: underline; cursor: pointer; font: inherit; padding: 0;
}

/* ───────────────────────── list view ───────────────────────── */

.listview { flex: 1 1 auto; overflow-y: auto; min-width: 0; background: var(--bg); }
.listview-inner { padding: 1rem; max-width: 70rem; }
.listview h2 { margin: 0 0 .4rem; font-size: 1.1rem; }
.list-count { font-size: .82rem; color: var(--text-dim); margin: .4rem 0; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.entity-table { border-collapse: collapse; width: 100%; font-size: .85rem; }
.entity-table th, .entity-table td {
  text-align: left; padding: .45rem .6rem; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.entity-table thead th { position: sticky; top: 0; background: var(--surface-2); z-index: 1; }
.entity-table tbody tr:hover { background: var(--surface-2); }
.entity-table code { font-size: .8rem; color: var(--text-dim); }
.sortbtn {
  background: none; border: none; padding: 0; font: inherit; font-weight: 600;
  color: var(--text); cursor: pointer; text-align: left;
}
.sortbtn:hover { color: var(--accent); }
.namebtn {
  background: none; border: none; padding: 0; font: inherit; font-weight: 600;
  color: var(--accent); cursor: pointer; text-align: left;
}

/* ───────────────────────── comparison matrix ───────────────────────── */

.compare-inner { max-width: 92rem; }

.matrix-legend {
  list-style: none; margin: .6rem 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: .3rem 1.1rem;
  font-size: .78rem; color: var(--text-dim);
}
/* Each legend row is exactly two flex children — the key and one wrapper span.
   Leaving the label as bare text plus <code> would make every <code> its own
   flex item and shred the sentence. */
.matrix-legend li { display: flex; align-items: baseline; gap: .4rem; }
/* Wide rather than square: a small bordered box next to the sidebar's real
   checkboxes reads as a checkbox, not as a colour key. */
.cell-key {
  width: 1.7rem; height: .7rem; border-radius: 2px; flex: none;
  border: 1px solid var(--border-strong);
}
.cell-key.is-implemented { background: var(--accent-weak); border-color: var(--accent); }
.cell-key.is-applies     { background: var(--surface-2); }
.cell-key.is-none        { background: transparent; }

.matrix th[scope="row"] {
  position: sticky; left: 0; background: var(--surface); z-index: 1;
  min-width: 13rem; border-right: 1px solid var(--border);
}
.matrix tbody tr:hover th[scope="row"] { background: var(--surface-2); }
.matrix thead th { text-align: left; white-space: nowrap; }
.matrix thead th:first-child { left: 0; z-index: 2; }
.matrix td { min-width: 8.5rem; }

/* The three cell states are distinguished by text as well as by tint —
   colour alone would make the matrix unreadable without it. */
.matrix td.is-implemented { background: var(--accent-weak); }
.matrix td.is-applies     { background: var(--surface-2); }

.cell-applies, .cell-none { font-size: .78rem; color: var(--text-dim); }
.cell-entity { display: block; margin-bottom: .2rem; }
.cell-entity:last-child { margin-bottom: 0; }
.cell-status { font-size: .72rem; color: var(--text-dim); display: block; }
.row-note { display: block; font-weight: 400; font-size: .75rem; color: var(--text-dim); margin-top: .15rem; }
.row-id { display: block; font-weight: 400; font-size: .72rem; color: var(--text-dim); }

/* ───────────────────────── detail panel ───────────────────────── */

.detail {
  flex: 0 0 var(--detail-w); width: var(--detail-w);
  background: var(--surface); border-left: 1px solid var(--border);
  overflow-y: auto; overscroll-behavior: contain; position: relative;
}
.detail[hidden] { display: none; }
.detail-inner { padding: .9rem 1rem 2rem; }
.detail-close { position: absolute; top: .6rem; right: .6rem; }

.d-title { margin: 0 1.8rem .15rem 0; font-size: 1.12rem; line-height: 1.25; }
.d-id { font-size: .78rem; color: var(--text-dim); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.chips { display: flex; flex-wrap: wrap; gap: .3rem; margin: .6rem 0; }
.chip {
  font-size: .74rem; padding: .16rem .45rem; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
  color: var(--text-dim);
}
.chip.lvl { color: #fff; border: none; }
.chip.strong { background: var(--accent-weak); color: var(--text); border-color: var(--accent); }

.d-desc { font-size: .88rem; margin: .6rem 0; }

.d-sec { margin-top: 1rem; }
.d-sec h4 {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .07em;
  color: var(--text-dim); margin: 0 0 .35rem;
  border-top: 1px solid var(--border); padding-top: .6rem;
}
.d-sec ul { margin: 0; padding: 0; list-style: none; font-size: .85rem; }
.d-sec li { padding: .16rem 0; overflow-wrap: anywhere; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: .15rem .6rem; font-size: .84rem; }
.kv dt { color: var(--text-dim); }
.kv dd { margin: 0; }

.rel-line { display: flex; gap: .4rem; align-items: baseline; padding: .22rem 0; }
.rel-dir { flex: 0 0 auto; color: var(--text-dim); font-size: .78rem; }
.rel-type {
  font-size: .72rem; padding: .1rem .35rem; border-radius: 4px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  white-space: nowrap;
}
.rel-target { background: none; border: none; padding: 0; font: inherit; color: var(--accent); cursor: pointer; text-align: left; }
.rel-interp { color: var(--focus); font-size: .72rem; }
.evidence { font-size: .76rem; color: var(--text-dim); margin: .1rem 0 .3rem 1rem; }

.ghlink {
  display: inline-block; margin-top: 1rem; padding: .5rem .8rem;
  background: var(--accent); color: #fff; border-radius: 6px;
  text-decoration: none; font-size: .86rem; font-weight: 600;
}
.ghlink:hover { filter: brightness(1.1); }

.caveat {
  font-size: .76rem; color: var(--text-dim); margin-top: .8rem;
  border-left: 3px solid var(--focus); padding: .35rem .6rem; background: var(--surface-2);
}

/* ───────────────────────── footer ───────────────────────── */

.footer {
  flex: 0 0 auto; padding: .4rem .75rem; font-size: .74rem;
  color: var(--text-dim); background: var(--surface);
  border-top: 1px solid var(--border);
}
.footer p { margin: 0; }

/* ───────────────────────── responsive ───────────────────────── */

@media (max-width: 1100px) {
  :root { --sidebar-w: 17rem; --detail-w: 20rem; }
}

@media (max-width: 860px) {
  .topbar { gap: .5rem; }
  .brand-sub { display: none; }
  #filters-toggle { display: inline-block; order: 3; }
  .search-wrap { order: 5; flex-basis: 100%; }
  .views { order: 2; }
  .views .view-btn { padding: .45rem .55rem; font-size: .8rem; }

  .layout { position: relative; }

  .sidebar {
    position: absolute; z-index: 30; inset: 0 auto 0 0;
    width: min(85vw, 20rem); flex-basis: auto;
    box-shadow: 4px 0 24px rgba(0,0,0,.28);
    transform: translateX(-102%); transition: transform .18s ease;
  }
  .sidebar.is-open { transform: none; }
  @media (prefers-reduced-motion: reduce) { .sidebar { transition: none; } }

  .detail {
    position: absolute; z-index: 25; inset: auto 0 0 0;
    width: auto; flex-basis: auto; max-height: 62%;
    border-left: none; border-top: 1px solid var(--border-strong);
    box-shadow: 0 -4px 24px rgba(0,0,0,.24);
  }

  .stage-controls { bottom: auto; top: .6rem; }
}

@media (max-width: 520px) {
  .topbar h1 { font-size: .92rem; }
  .stage-controls { flex-direction: row; }
}

/* ─────────────────────── sourcing banner ───────────────────────
   Deliberately not dismissible. The per-entity caveat in the detail panel
   tells a reader about one entity; this tells them about the corpus, and a
   reader who never clicks a node would otherwise never learn it. */
.sourcing-banner {
  padding: .5rem .9rem;
  font-size: .8rem;
  line-height: 1.45;
  color: var(--text-dim);
  background: var(--surface-2, rgba(255, 200, 0, .06));
  border-bottom: 1px solid var(--border);
  border-left: 3px solid #d79b00;
}
.sourcing-banner strong { color: var(--text); }
.sourcing-banner code { font-size: .95em; }
.sourcing-banner a { color: inherit; text-decoration: underline; white-space: nowrap; }
@media (max-width: 700px) { .sourcing-banner { font-size: .74rem; } }