/* ==========================================================================
   Energy & Prosperity — shared design system
   ========================================================================== */

:root {
  /* Neutrals */
  --ink:        #16191d;
  --ink-2:      #3d434b;
  --ink-3:      #6b7280;
  --rule:       #e2e5ea;
  --rule-soft:  #eef0f3;
  --paper:      #ffffff;
  --paper-2:    #f7f8fa;

  /* Region palette. Okabe-Ito, picked so the colors stay distinct for
     colorblind viewers. D3's default schemeSet2 does not. */
  --c-africa:   #d55e00;
  --c-americas: #0072b2;
  --c-asia:     #cc79a7;
  --c-europe:   #009e73;
  --c-oceania:  #e69f00;
  --c-nodata:   #b6bcc4;

  --accent:     #0072b2;
  --trend:      #16191d;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans:  ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
           Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 1180px;
}

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

html { -webkit-text-size-adjust: 100%; }

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

/* ---------- Layout ---------------------------------------------------- */

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px 72px;
}

.masthead {
  border-bottom: 1px solid var(--rule);
  margin-bottom: 32px;
  padding: 30px 0 22px;
}

.masthead .kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 10px;
}

.masthead h1 {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}

.masthead .standfirst {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 68ch;
  margin: 0;
}

/* ---------- Scene narration ------------------------------------------- */

.scene-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  margin-bottom: 20px;
}

.scene-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 8px;
}

.scene-title {
  font-family: var(--serif);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}

.scene-body {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 72ch;
  margin: 0;
}

.scene-body strong { color: var(--ink); font-weight: 600; }

/* Fade narration on scene change */
.fade-swap { transition: opacity 260ms ease; }
.fade-swap.is-out { opacity: 0; }

/* ---------- Stat readout ---------------------------------------------- */

.stats {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  padding: 14px 18px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 8px;
  margin-bottom: 20px;
}

.stat .stat-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: block;
}

.stat .stat-value {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.25;
}

.stat .stat-note {
  font-size: 12px;
  color: var(--ink-3);
}

/* ---------- Chart shell ------------------------------------------------ */

.chart-card {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 18px 20px 12px;
  background: var(--paper);
}

.chart-card + .chart-card { margin-top: 22px; }

.chart-title {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 2px;
}

.chart-sub {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 0 0 10px;
}

svg { display: block; width: 100%; height: auto; overflow: visible; }

/* Axes */
.axis path,
.axis line { stroke: var(--rule); shape-rendering: crispEdges; }
.axis text { fill: var(--ink-3); font-size: 11.5px; font-family: var(--sans); }
.axis .domain { stroke: var(--ink-3); }

.grid line { stroke: var(--rule-soft); shape-rendering: crispEdges; }
.grid .domain { stroke: none; }

.axis-title {
  fill: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--sans);
}

/* Marks */
.dot { stroke: #fff; stroke-width: 1; cursor: pointer; }
.dot.is-nodata { stroke: var(--ink-3); stroke-dasharray: 2 1.6; stroke-width: 1; }
.dot.is-dim { opacity: 0.22; }
.dot.is-hit { stroke: var(--ink); stroke-width: 2.25; }

.trend-line {
  stroke: var(--trend);
  stroke-width: 1.6;
  stroke-dasharray: 6 4;
  fill: none;
  opacity: 0.65;
}

.trend-label {
  font-family: var(--mono);
  font-size: 11px;
  fill: var(--ink-2);
}

/* d3-annotation overrides */
.annotation-note-title { font-weight: 600; fill: var(--ink); font-size: 13px; }
.annotation-note-label { fill: var(--ink-2); font-size: 12px; }
.annotation path.connector { stroke: var(--ink-3); }
.annotation .annotation-note-bg { fill: #fff; fill-opacity: 0.86; }

/* ---------- Legends ---------------------------------------------------- */

.legend-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  padding-top: 4px;
  margin-top: 6px;
  border-top: 1px solid var(--rule-soft);
}

.legend-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.legend-caption {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
  cursor: pointer;
  border: 0;
  background: none;
  padding: 2px 0;
  font-family: inherit;
}

.legend-item:hover { color: var(--ink); }
.legend-item.is-off { opacity: 0.35; }
.legend-item .swatch {
  width: 11px; height: 11px;
  border-radius: 50%;
  flex: 0 0 auto;
  border: 1px solid rgba(0,0,0,0.12);
}
.legend-item .swatch.hollow {
  background: var(--c-nodata);
  border: 1px dashed var(--ink-3);
}

.size-key { display: inline-flex; align-items: flex-end; gap: 8px; }

/* ---------- Controls --------------------------------------------------- */

.controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 26px 0 8px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.btn {
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 9px 18px;
  border-radius: 7px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, color 140ms ease;
}

.btn:hover:not(:disabled) { background: var(--paper-2); border-color: var(--ink-3); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: 0.38; cursor: not-allowed; }

.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: #000; border-color: #000; color: #fff; }

.progress { display: flex; gap: 8px; align-items: center; margin-right: 2px; }

.progress-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--rule);
  border: 0; padding: 0;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}
.progress-dot:hover { background: var(--ink-3); }
.progress-dot.is-active { background: var(--ink); transform: scale(1.35); }
.progress-dot:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.controls .spacer { flex: 1; }

.hint {
  font-size: 12px;
  color: var(--ink-3);
}
.hint kbd {
  font-family: var(--mono);
  font-size: 11px;
  border: 1px solid var(--rule);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  background: var(--paper-2);
}

/* Selects */
.field { display: inline-flex; flex-direction: column; gap: 5px; }
.field label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.field select {
  font: inherit;
  font-size: 14px;
  padding: 8px 12px;
  border: 1px solid var(--rule);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
  min-width: 230px;
  cursor: pointer;
}
.field select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- Tooltip ---------------------------------------------------- */

.tooltip {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  z-index: 60;
  background: rgba(15, 18, 22, 0.95);
  color: #fff;
  border-radius: 7px;
  padding: 9px 11px;
  font-size: 12.5px;
  line-height: 1.5;
  max-width: 250px;
  box-shadow: 0 6px 22px rgba(0,0,0,0.24);
  transition: opacity 130ms ease;
}
.tooltip .tt-name { font-weight: 600; font-size: 13.5px; margin-bottom: 3px; }
.tooltip .tt-row { display: flex; justify-content: space-between; gap: 16px; }
.tooltip .tt-key { color: #b9c0c9; }
.tooltip .tt-val { font-variant-numeric: tabular-nums; }
.tooltip .tt-muted { color: #9aa3ad; font-style: italic; }

/* ---------- Two-up grid ------------------------------------------------ */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 22px;
}

/* ---------- Notes / footer --------------------------------------------- */

.note {
  border-left: 2px solid var(--rule);
  padding: 2px 0 2px 16px;
  margin: 26px 0 0;
  font-size: 13.5px;
  color: var(--ink-3);
  max-width: 78ch;
}
.note strong { color: var(--ink-2); font-weight: 600; }

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 44px;
  padding-top: 18px;
  font-size: 12.5px;
  color: var(--ink-3);
}
.site-footer a { color: var(--ink-2); }

a { color: var(--accent); }

.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;
}

@media (max-width: 720px) {
  .wrap { padding: 0 18px 56px; }
  .scene-head { grid-template-columns: 1fr; }
  .stats { gap: 18px; }
  .controls .spacer { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}