/* ============================================================
   NMTC viewer — dark, editorial, map-forward
   ============================================================ */

:root {
  --bg:         #0b1220;
  --bg-soft:    #11192b;
  --bg-panel:   #17223a;
  --fg:         #e5e7eb;
  --fg-dim:     #94a3b8;
  --fg-faint:   #64748b;
  --border:     #243149;
  --cyan:       #4fd1c5;
  --cyan-dim:   #2ba99b;
  --amber:      #fbbf24;
  --metro:      #3d8ecc;
  --nonmetro:   #e05555;
  --accent:     #a78bfa;
  --measure:    72ch;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--cyan-dim); text-decoration: underline; }
code { font-family: 'IBM Plex Mono', Menlo, monospace; font-size: 0.9em; color: var(--amber); }

/* ---------- top nav ---------- */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 18, 32, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1.2rem;
  display: flex; gap: 1.2rem; align-items: center;
  font-size: 0.88rem;
  font-family: 'IBM Plex Mono', monospace;
  overflow-x: auto;
}
.topnav .brand {
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.02em;
  margin-right: auto;
}
.topnav a { color: var(--fg-dim); white-space: nowrap; }
.topnav a:hover { color: var(--cyan); text-decoration: none; }

/* ---------- hero ---------- */
.hero {
  min-height: 80vh;
  display: flex; align-items: center; justify-content: center;
  padding: 5rem 1.5rem 4rem;
  background:
    radial-gradient(ellipse 800px 500px at 30% 10%, rgba(79, 209, 197, 0.08), transparent),
    radial-gradient(ellipse 600px 400px at 80% 70%, rgba(167, 139, 250, 0.07), transparent),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: 860px; text-align: left; }
.kicker {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--cyan);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}
.hero h1 {
  font-family: 'Newsreader', 'Inter', serif;
  font-weight: 500;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  line-height: 1.05;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}
.subtitle {
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  color: var(--fg-dim);
  line-height: 1.5;
  max-width: 640px;
  margin: 0 0 2rem;
}
.byline {
  color: var(--fg-faint);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.88rem;
  margin: 0 0 3rem;
}
.scroll-hint {
  color: var(--fg-faint);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* ---------- prose sections ---------- */
section.prose {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  border-top: 1px solid var(--border);
}
section.prose h2 {
  font-family: 'Newsreader', serif;
  font-weight: 500;
  font-size: 2.2rem;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  color: var(--fg);
}
section.prose h3 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--cyan);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 2.5rem 0 0.8rem;
}
section.prose p { max-width: var(--measure); color: #cbd5e1; }
section.prose p strong { color: var(--fg); font-weight: 600; }
section.prose p em    { color: var(--amber); font-style: italic; }

.caption {
  color: var(--fg-dim);
  font-size: 0.92rem;
  max-width: var(--measure);
  margin-top: 1rem;
}

figure {
  margin: 2rem 0;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
figure img { display: block; width: 100%; height: auto; }
figcaption {
  padding: 0.85rem 1.2rem;
  color: var(--fg-dim);
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.two-col figure { margin: 0; }

/* ---------- flow diagram ---------- */
.flowbox {
  margin: 2rem 0 1rem;
  padding: 1rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.flow { width: 100%; height: auto; max-height: 260px; }
.node {
  fill: #17223a;
  stroke: var(--cyan);
  stroke-width: 1.5;
}
.node-target { stroke: var(--nonmetro); }
.nTitle {
  fill: var(--fg);
  font: 600 18px 'Inter', sans-serif;
  text-anchor: middle;
}
.nSub {
  fill: var(--fg-dim);
  font: 400 11px 'Inter', sans-serif;
  text-anchor: middle;
}
.flow-arrow { stroke: var(--cyan); stroke-width: 2; fill: none; }
.flow-arrow-back { stroke: var(--amber); stroke-width: 1.5; fill: none; stroke-dasharray: 5 3; }
.flabel {
  fill: var(--cyan);
  font: 500 13px 'IBM Plex Mono', monospace;
  text-anchor: middle;
}
.flabel-small {
  fill: var(--fg-faint);
  font: 400 11px 'IBM Plex Mono', monospace;
  text-anchor: middle;
}
.credit-label {
  fill: var(--amber);
  font: 500 12px 'IBM Plex Mono', monospace;
  text-anchor: middle;
}

/* ---------- callouts ---------- */
.callouts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}
.callout {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  border-radius: 4px;
  padding: 1rem 1.2rem;
}
.callout h4 {
  margin: 0 0 0.6rem;
  color: var(--cyan);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}
.callout p {
  font-size: 0.92rem;
  color: #cbd5e1;
  margin: 0;
  line-height: 1.5;
  max-width: none;
}

/* ---------- KPI cards ---------- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.9rem;
  margin: 2rem 0;
}
.kpi {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.2rem;
}
.kpi .lbl {
  color: var(--fg-faint);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}
.kpi .val {
  color: var(--fg);
  font-family: 'Newsreader', serif;
  font-size: 2rem;
  font-weight: 500;
  line-height: 1.1;
}
.kpi .sub {
  color: var(--fg-dim);
  font-size: 0.82rem;
  margin-top: 0.25rem;
}
.kpi.highlight { border-left: 3px solid var(--amber); }
.kpi.highlight .val { color: var(--amber); }

details.provenance {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 1rem;
  margin-top: 2rem;
  font-size: 0.9rem;
}
details.provenance summary {
  cursor: pointer;
  color: var(--fg-dim);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
}
details.provenance p {
  margin: 0.8rem 0 0;
  color: var(--fg-dim);
  font-size: 0.9rem;
}

/* ---------- MAP section ---------- */
section.full-bleed {
  width: 100%;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
  background: #000;
}
.map-narrative {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem 1.5rem;
}
.map-narrative h2 {
  font-family: 'Newsreader', serif;
  font-weight: 500;
  font-size: 2.2rem;
  margin: 0 0 0.8rem;
  letter-spacing: -0.01em;
}
.map-narrative p {
  color: var(--fg-dim);
  max-width: 80ch;
  font-size: 1.02rem;
}
.sw {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 50%;
  vertical-align: middle;
  margin: 0 2px;
}
.sw.metro    { background: var(--metro); }
.sw.nonmetro { background: var(--nonmetro); }

.controls {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1fr 1fr;
  gap: 1.2rem;
  align-items: start;
}
.controls .ctl label {
  display: block;
  color: var(--fg-faint);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
  font-weight: 600;
}
.yr-display {
  color: var(--cyan);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  font-weight: 500;
  float: right;
  text-transform: none;
  letter-spacing: normal;
}
.slider-wrap {
  position: relative;
  height: 32px;
}
.slider-wrap input[type=range] {
  position: absolute;
  left: 0; top: 12px;
  width: 100%;
  -webkit-appearance: none;
  background: transparent;
  pointer-events: none;
}
.slider-wrap input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--cyan);
  border: 2px solid var(--bg);
  cursor: pointer;
  pointer-events: auto;
  position: relative;
  z-index: 2;
}
.slider-wrap input[type=range]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cyan); border: 2px solid var(--bg);
  cursor: pointer; pointer-events: auto;
}
.slider-wrap::before {
  content: "";
  position: absolute;
  left: 8px; right: 8px; top: 18px; height: 4px;
  background: var(--border);
  border-radius: 2px;
}
.toggles {
  display: flex; flex-direction: column; gap: 0.3rem;
  font-size: 0.9rem;
}
.toggles.small {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.3rem;
  font-size: 0.85rem;
}
.toggles label {
  color: var(--fg) !important;
  font-size: 0.88rem !important;
  text-transform: none !important;
  letter-spacing: 0 !important;
  font-weight: 400 !important;
  margin: 0 !important;
  display: flex !important;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}
.controls select {
  background: var(--bg-soft);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.45rem 0.6rem;
  font-family: inherit;
  font-size: 0.9rem;
  width: 100%;
}
.counter div {
  color: var(--fg);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.95rem;
}
#countShown, #dollarShown {
  color: var(--amber);
  font-weight: 500;
}

#cesiumContainer {
  width: 100%;
  height: 72vh;
  min-height: 500px;
  position: relative;
}
#cesiumContainer .cesium-widget-credits { display: none !important; }

/* hide Cesium default toolbar button styling we don't want */
.cesium-viewer-toolbar { top: 10px; right: 10px; }

.info-panel {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.2rem 1.5rem 3rem;
}
.info-panel h4 {
  margin: 0 0 0.5rem;
  color: var(--cyan);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.info-panel p { margin: 0.2rem 0; color: var(--fg); font-size: 0.95rem; }
.info-panel p.dim { color: var(--fg-faint); }
.info-panel .info-kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 0.4rem 1rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.88rem;
  margin-top: 0.6rem;
}
.info-panel .info-kv .k { color: var(--fg-faint); }
.info-panel .info-kv .v { color: var(--fg); }

/* ---------- CDE table ---------- */
.cde-table-wrap {
  margin: 2rem 0;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
}
.cde-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.cde-table thead th {
  text-align: left;
  padding: 0.7rem 0.9rem;
  color: var(--fg-faint);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.15);
}
.cde-table th.r, .cde-table td.r { text-align: right; }
.cde-table tbody td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(36,49,73,0.5);
  color: #cbd5e1;
}
.cde-table tbody tr:hover { background: rgba(79,209,197,0.04); }
.cde-table td.name { color: var(--fg); }
.cde-table .bar {
  display: inline-block;
  height: 6px;
  background: linear-gradient(to right, var(--metro) 0%, var(--nonmetro) 100%);
  border-radius: 3px;
  min-width: 2px;
}
.cde-table .bar-wrap {
  display: flex; align-items: center; gap: 0.5rem;
  min-width: 120px;
}

/* ---------- equations ---------- */
.katex-display {
  margin: 1.5rem 0 !important;
  padding: 1.2rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  overflow-x: auto;
}
.katex { color: #e5e7eb !important; font-size: 1.05em !important; }

/* ---------- next steps ---------- */
ol.nextlist {
  max-width: var(--measure);
  padding-left: 0;
  list-style: none;
  counter-reset: nl;
}
ol.nextlist li {
  counter-increment: nl;
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1.2rem;
  color: #cbd5e1;
}
ol.nextlist li::before {
  content: counter(nl);
  position: absolute;
  left: 0; top: 0;
  width: 2.2rem; height: 2.2rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-soft);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  border-radius: 50%;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 0.9rem;
}

footer {
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--fg-dim);
  font-size: 0.88rem;
  background: var(--bg-soft);
}
footer p { max-width: 740px; margin: 0.5rem auto; }
footer p.dim { color: var(--fg-faint); font-size: 0.82rem; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .callouts { grid-template-columns: 1fr; }
  .two-col  { grid-template-columns: 1fr; }
  .controls { grid-template-columns: 1fr 1fr; }
  section.prose { padding: 3rem 1.2rem; }
  .map-narrative h2, section.prose h2 { font-size: 1.7rem; }
}
@media (max-width: 600px) {
  .controls { grid-template-columns: 1fr; }
  .hero { padding: 3rem 1rem; }
  #cesiumContainer { height: 60vh; }
}