:root {
  --ink: #1f2a33;
  --muted: #6f7b84;
  --paper: #f4f1ea;
  --panel: #fbfaf7;
  --line: #d8d2c7;
  --blue: #4f6f86;
  --orange: #9a6a4f;
  --gold: #8a7a4f;
  --green: #5f7f6d;
  --red: #9a6a63;
  --shadow: 0 18px 44px rgba(31, 42, 51, 0.08);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
}

.story-page {
  overflow-x: hidden;
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(1520px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 18px 0 34px;
}

.gapminder-page,
.story-page {
  height: 100vh;
  overflow: hidden;
}

.gapminder-page .app-shell {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 10px;
  width: min(100vw - 24px, 3000px);
  height: 100vh;
  padding: 10px 0;
}

.story-page .app-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 8px;
  width: 100%;
  max-width: min(3000px, calc(100% - 20px));
  height: 100dvh;
  padding: 8px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1fr minmax(180px, 230px);
  gap: 16px;
  align-items: stretch;
  color: #fff8ef;
  margin-bottom: 12px;
}

.gapminder-page .hero,
.story-page .hero {
  grid-template-columns: 1fr minmax(170px, 220px);
  gap: 12px;
  margin-bottom: 0;
}

.story-page .hero {
  grid-template-columns: 1fr;
  color: var(--ink);
}

.story-page .hero .intro {
  color: var(--muted);
}

.gapminder-page .hero .eyebrow,
.story-page .hero .eyebrow {
  margin-bottom: 4px;
  font-size: 0.66rem;
}

.gapminder-page .hero h1,
.story-page .hero h1 {
  margin-bottom: 0;
  font-size: clamp(1.12rem, 1.55vw, 1.8rem);
}

.gapminder-page .hero .intro,
.story-page .hero .intro {
  margin-bottom: 0;
  font-size: 0.86rem;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 920px;
  margin-bottom: 8px;
  font-size: clamp(1.65rem, 3vw, 3.15rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.intro {
  max-width: 720px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.4;
}

.kpi-card,
.controls,
.chart-card,
.detail-card,
.notes {
  border: 1px solid rgba(222, 207, 189, 0.78);
  border-radius: 28px;
  background: rgba(255, 250, 242, 0.94);
  box-shadow: var(--shadow);
}

.kpi-card {
  display: grid;
  align-content: center;
  padding: 16px 18px;
  color: var(--ink);
}

.kpi-card span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.kpi-card strong {
  margin: 6px 0;
  color: var(--orange);
  font-size: 2.25rem;
  line-height: 1;
}

.kpi-card small {
  color: var(--muted);
  line-height: 1.35;
}

.controls {
  display: grid;
  grid-template-columns: minmax(330px, 1fr) minmax(430px, 1.35fr) minmax(210px, 0.55fr);
  gap: 14px;
  align-items: end;
  padding: 12px;
  margin-bottom: 14px;
}

.gapminder-page .controls,
.story-page .controls {
  gap: 10px;
  margin-bottom: 0;
  padding: 8px 10px;
  border-radius: 18px;
}

.story-page .controls {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex: 0 0 auto;
  border-color: rgba(222, 207, 189, 0.58);
  background: rgba(255, 250, 242, 0.72);
  box-shadow: none;
}

.story-page .side-panel .controls-row,
.story-page .side-panel .controls-row--explore {
  display: grid;
  gap: 10px;
}

.story-page .side-panel .timeline-controls {
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.story-page .side-panel .timeline-controls label {
  grid-column: 1 / -1;
}

.story-page .side-panel .button-row {
  gap: 6px;
}

.controls-row {
  display: contents;
}

.controls-row--explore {
  display: contents;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0;
  min-width: 0;
}

.control-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline-controls {
  display: grid;
  grid-template-columns: auto minmax(120px, 1fr) auto;
  align-items: center;
  gap: 8px 10px;
}

.timeline-controls label {
  margin: 0;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: normal;
  text-transform: none;
  white-space: nowrap;
}

.timeline-controls input[type="range"] {
  width: 100%;
  min-width: 0;
}

.control-group--search input[type="search"] {
  width: 100%;
}

.controls .button-row {
  gap: 6px;
}

.controls .button-row button,
.controls #playButton {
  padding: 7px 9px;
  font-size: 0.78rem;
}

input[type="range"] {
  accent-color: var(--orange);
}

input[type="search"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 14px;
  color: var(--ink);
  background: #fff;
  outline-color: var(--orange);
}

button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: rgba(216, 121, 74, 0.68);
}

button.active,
#playButton.is-playing {
  border-color: transparent;
  color: #fff;
  background: var(--ink);
}

.page-link {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(255, 248, 239, 0.32);
  border-radius: 999px;
  padding: 10px 14px;
  color: #fff8ef;
  text-decoration: none;
  background: rgba(255, 248, 239, 0.08);
  transition: transform 150ms ease, background 150ms ease;
}

.page-link:hover {
  transform: translateY(-1px);
  background: rgba(255, 248, 239, 0.16);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.visual-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 14px;
}

.gapminder-page .visual-layout,
.story-page .visual-layout {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: 10px;
  min-height: 0;
  min-width: 0;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

.chart-card,
.detail-card,
.notes {
  padding: 16px;
}

.gapminder-page .chart-card,
.gapminder-page .detail-card,
.story-page .chart-card,
.story-page .detail-card {
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 12px;
  border-radius: 22px;
}

.story-page .chart-card {
  padding: 14px 14px 12px;
  border-color: rgba(154, 106, 79, 0.26);
  box-shadow: 0 20px 54px rgba(31, 42, 51, 0.11);
  min-width: 0;
  overflow: hidden;
}

.story-page .detail-card {
  padding: 12px;
  border-color: rgba(222, 207, 189, 0.62);
  background: rgba(255, 250, 242, 0.76);
  box-shadow: none;
  flex: 1 1 auto;
}

.gapminder-page .notes {
  display: none;
}

.story-page .notes {
  display: block;
  margin: 0;
  padding: 6px 10px;
  border-color: transparent;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
}

.story-page .notes h2 {
  display: none;
}

.story-page .notes p {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.4;
}

.chart-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: start;
}

.story-page .chart-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
}

.gapminder-page .chart-heading {
  gap: 12px;
}

.gapminder-page .chart-heading p {
  margin-bottom: 0;
  font-size: 0.84rem;
}

.story-page .chart-heading p {
  max-width: 840px;
  margin-bottom: 0;
  font-size: 0.86rem;
}

.gapminder-page .chart-heading h2 {
  margin-bottom: 2px;
}

.chart-heading h2,
.detail-card h2,
.notes h2 {
  margin-bottom: 6px;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
}

.story-page .chart-heading h2 {
  font-size: clamp(1.18rem, 1.55vw, 1.55rem);
}

.chart-heading p,
.detail-card p,
.notes p {
  color: var(--muted);
  line-height: 1.38;
}

.legend {
  display: grid;
  gap: 8px;
  min-width: 176px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.legend-dot {
  display: inline-block;
  width: 11px;
  height: 11px;
  margin-right: 7px;
  border-radius: 50%;
}

.legend-dot.grow {
  background: var(--green);
}

.legend-dot.decline {
  background: var(--red);
}

.chart-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 8px 0 10px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
}

.chart-tools span {
  margin-right: 4px;
}

.chart-tools button {
  padding: 7px 10px;
}

.chart {
  min-height: 680px;
}

.gapminder-page .chart,
.story-page .chart {
  flex: 1;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

.story-page .chart {
  min-height: min(710px, calc(100dvh - 150px));
}

.gapminder-page .chart-tools {
  margin: 4px 0 8px;
}

.chart svg {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  overflow: hidden;
  cursor: grab;
}

.chart svg:active {
  cursor: grabbing;
}

.axis text {
  fill: var(--muted);
  font-size: 12px;
}

.axis path,
.axis line,
.grid line {
  stroke: #d8c8b6;
}

.grid path {
  display: none;
}

.bubble {
  stroke: rgba(255, 255, 255, 0.9);
  stroke-width: 1.5;
  cursor: pointer;
  transition: opacity 220ms ease, stroke-width 220ms ease, filter 220ms ease;
}

.bubble.is-muted {
  opacity: 0.12;
}

.bubble.is-locked-muted {
  filter: grayscale(0.55);
}

.bubble.is-neighbor-muted {
  opacity: 0.18;
}

.bubble.is-hovered {
  opacity: 1;
  stroke: var(--ink);
  stroke-width: 2.5;
  filter: drop-shadow(0 4px 10px rgba(31, 42, 51, 0.18));
}

.bubble.is-selected {
  stroke: var(--ink);
  stroke-width: 3;
  filter: drop-shadow(0 5px 14px rgba(31, 42, 51, 0.22));
}

.bubble-label {
  pointer-events: none;
}

.bubble-label.is-selected-label {
  paint-order: stroke;
  stroke: #fff8ef;
  stroke-width: 4;
}

.axis-label {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

.year-watermark {
  fill: rgba(31, 42, 51, 0.08);
  font-size: clamp(4.5rem, 10vw, 8rem);
  font-weight: 900;
  pointer-events: none;
}

.equality-line {
  stroke: var(--ink);
  stroke-width: 2.5;
}

.equality-label {
  fill: var(--ink);
  font-size: 11px;
  font-weight: 800;
  pointer-events: none;
}

.reference-line {
  stroke: var(--gold);
  stroke-dasharray: 6 6;
  stroke-width: 1.2;
  opacity: 0.7;
}

.reference-label {
  fill: var(--gold);
  font-size: 11px;
  font-weight: 900;
  paint-order: stroke;
  pointer-events: none;
  stroke: rgba(255, 250, 242, 0.9);
  stroke-width: 4;
}

.average-gap-line {
  stroke: var(--orange);
  stroke-dasharray: 7 7;
  stroke-width: 1.8;
  opacity: 0.9;
}

.average-gap-label {
  fill: var(--orange);
  font-size: 11px;
  font-weight: 900;
  paint-order: stroke;
  pointer-events: none;
  stroke: rgba(255, 250, 242, 0.9);
  stroke-width: 4;
}

.locked-trail {
  pointer-events: none;
}

.locked-trail-line {
  fill: none;
  stroke: var(--ink);
  stroke-dasharray: 3 5;
  stroke-linecap: round;
  stroke-width: 1.8;
  opacity: 0.62;
}

.locked-trail-point {
  fill: var(--gold);
  stroke: #fff8ef;
  stroke-width: 1.5;
}

.locked-trail-point.is-current {
  fill: var(--ink);
  stroke-width: 2;
}

.locked-trail-label {
  fill: var(--ink);
  font-size: 10px;
  font-weight: 800;
  opacity: 0.74;
  paint-order: stroke;
  stroke: rgba(255, 250, 242, 0.92);
  stroke-width: 3;
}

.locked-trail-label.is-current {
  opacity: 1;
}

.detail-card {
  position: sticky;
  top: 18px;
  align-self: start;
}

.gapminder-page .detail-card,
.story-page .detail-card {
  position: static;
  align-self: stretch;
  overflow: hidden;
}

.story-page .detail-card .eyebrow {
  margin-bottom: 5px;
  font-size: 0.66rem;
}

.story-page .detail-card h2 {
  margin-bottom: 6px;
  font-size: 1.02rem;
  line-height: 1.12;
}

.story-page .detail-card p {
  margin-bottom: 10px;
  font-size: 0.82rem;
}

.gapminder-page .detail-card .eyebrow {
  margin-bottom: 4px;
  font-size: 0.68rem;
}

.gapminder-page .detail-card h2 {
  margin-bottom: 6px;
  font-size: 1.02rem;
}

.gapminder-page .detail-card p {
  margin-bottom: 8px;
  font-size: 0.84rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0 24px;
}

.story-page .metric-grid {
  gap: 8px;
  margin: 8px 0 12px;
}

.gapminder-page .metric-grid {
  gap: 8px;
  margin: 8px 0 12px;
}

.gapminder-page .metric-grid div {
  padding: 10px;
  border-radius: 14px;
}

.gapminder-page .metric-grid strong {
  font-size: 1rem;
}

.metric-grid div {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.62);
}

.story-page .metric-grid div {
  padding: 9px;
  border-radius: 13px;
}

.metric-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.metric-grid strong {
  display: block;
  margin-top: 5px;
  color: var(--ink);
  font-size: 1.28rem;
}

.story-page .metric-grid strong {
  font-size: 0.98rem;
}

.mini-chart-block {
  margin-top: 18px;
}

.story-page .mini-chart-block {
  margin-top: 8px;
}

.gapminder-page .mini-chart-block {
  margin-top: 10px;
}

.mini-chart-block h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.story-page .mini-chart-block h3 {
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.mini-chart {
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.58);
  overflow: hidden;
}

.story-page .mini-chart {
  min-height: 146px;
  border-radius: 14px;
}

.gapminder-page .mini-chart {
  min-height: 150px;
}

.distribution-area {
  opacity: 0.42;
  stroke: rgba(23, 50, 77, 0.16);
  stroke-width: 1;
}

.distribution-mean {
  stroke-width: 2.5;
  stroke-dasharray: 4 4;
}

.distribution-mean.male {
  stroke: var(--blue);
}

.distribution-mean.female {
  stroke: var(--orange);
}

.distribution-legend text {
  font-size: 11px;
  font-weight: 800;
}

.chart-empty {
  margin: 0;
  padding: 18px;
  color: var(--muted);
  font-size: 0.9rem;
}

.notes {
  margin-top: 22px;
}

.tooltip {
  position: fixed;
  z-index: 10;
  max-width: 260px;
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, calc(-100% - 14px));
  border: 1px solid rgba(23, 50, 77, 0.1);
  border-radius: 16px;
  padding: 12px 14px;
  color: var(--ink);
  background: rgba(255, 250, 242, 0.97);
  box-shadow: 0 18px 44px rgba(47, 55, 70, 0.18);
  transition: opacity 120ms ease;
}

.tooltip strong {
  display: block;
  margin-bottom: 6px;
}

.tooltip span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.45;
}

.how-to-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.how-to-modal.is-open {
  display: flex;
}

.how-to-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(31, 42, 51, 0.38);
  backdrop-filter: blur(4px);
}

.how-to-panel {
  position: relative;
  z-index: 1;
  width: min(1040px, 100%);
  max-height: min(88vh, 820px);
  overflow: auto;
  border: 1px solid rgba(222, 207, 189, 0.82);
  border-radius: 28px;
  padding: 20px;
  background: rgba(255, 250, 242, 0.98);
  box-shadow: 0 28px 80px rgba(31, 42, 51, 0.22);
}

.how-to-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
  margin-bottom: 16px;
}

.how-to-header .eyebrow {
  margin-bottom: 5px;
}

.how-to-header h2 {
  margin-bottom: 0;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  letter-spacing: -0.03em;
}

.how-to-close {
  flex: 0 0 auto;
}

.how-to-content {
  display: grid;
  grid-template-columns: minmax(360px, 1.15fr) minmax(280px, 0.85fr);
  gap: 22px;
  align-items: start;
}

.how-to-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.58);
}

.how-to-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.how-to-steps {
  display: grid;
  gap: 13px;
}

.how-to-steps div {
  border: 1px solid rgba(216, 210, 199, 0.82);
  border-radius: 18px;
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.56);
}

.how-to-steps h3 {
  margin-bottom: 5px;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
}

.how-to-steps p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

@media (max-width: 1040px) {
  body {
    background: var(--paper);
  }

  .gapminder-page,
  .story-page {
    height: auto;
    overflow: visible;
  }

  .story-page .app-shell {
    height: auto;
  }

  .hero,
  .controls,
  .visual-layout {
    grid-template-columns: 1fr;
  }

  .gapminder-page .visual-layout,
  .story-page .visual-layout {
    grid-template-columns: 1fr;
  }

  .controls-row,
  .controls-row--explore {
    display: grid;
  }

  .story-page .controls {
    gap: 8px;
    padding: 9px;
  }

  .story-page .control-label {
    margin-bottom: 5px;
  }

  .story-page .chart-heading {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .story-page .legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
  }

  .story-page .chart-tools {
    margin: 7px 0 8px;
  }

  .story-page .chart {
    flex: none;
    min-height: 560px;
  }

  .how-to-content {
    grid-template-columns: 1fr;
  }

  .detail-card {
    position: static;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100vw - 24px, 1380px);
    padding-top: 24px;
  }

  .chart-heading {
    display: block;
  }

  .story-page .chart-heading p {
    font-size: 0.82rem;
    line-height: 1.28;
  }

  .timeline-controls {
    grid-template-columns: auto minmax(90px, 1fr) auto;
    gap: 6px;
  }

  .timeline-controls #playButton {
    justify-self: auto;
  }

  .timeline-controls label {
    font-size: 0.84rem;
  }

  .controls .button-row button,
  .controls #playButton,
  .chart-tools button {
    padding: 6px 9px;
    font-size: 0.76rem;
  }

  input[type="search"] {
    padding: 9px 13px;
  }

  .story-page .chart-card {
    padding: 12px 12px 10px;
  }

  .story-page .chart {
    min-height: 500px;
  }

  .how-to-modal {
    padding: 12px;
  }

  .how-to-panel {
    border-radius: 22px;
    padding: 15px;
  }

  .how-to-header {
    display: grid;
  }
}