.origins-section {
  width: 100%;
  max-width: none;
  padding-inline: max(1rem, calc((100% - 1180px) / 2));
  border-block: 1px solid rgba(23, 32, 42, .14);
  background:
    linear-gradient(90deg, rgba(47, 111, 159, .045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(47, 111, 159, .045) 1px, transparent 1px),
    #f7f4ea;
  background-size: 36px 36px;
}

.origins-heading {
  max-width: 930px;
}

.origin-kicker {
  margin: 0 0 .55rem;
  color: var(--coral);
  font: 800 .78rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.internet-web-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 2.2rem 0 4rem;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.internet-web-split article {
  min-width: 0;
  padding: clamp(1rem, 3vw, 1.6rem);
  background: var(--panel);
}

.internet-web-split article:first-child {
  border-top: 7px solid var(--green);
}

.internet-web-split article:last-child {
  border-top: 7px solid var(--violet);
}

.internet-web-split h3,
.founders-intro h3,
.timeline-intro h3,
.access-waves h3,
.growth-heading h3 {
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  line-height: 1.08;
}

.internet-web-split p:last-child,
.founders-intro p:last-child,
.access-waves p,
.origins-sources p {
  color: var(--muted);
}

.founders-exhibit,
.origins-timeline,
.access-waves,
.growth-exhibit,
.origins-sources {
  padding: 3.6rem 0;
  border-top: 1px solid rgba(23, 32, 42, .16);
}

.founders-exhibit {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(0, 1.28fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.founders-intro {
  position: sticky;
  top: 104px;
}

.pioneer-list {
  display: grid;
  gap: 1px;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.pioneer-list section {
  display: grid;
  grid-template-columns: 100px minmax(160px, .7fr) minmax(0, 1.3fr);
  gap: 1rem;
  align-items: start;
  padding: 1rem;
  background: rgba(255, 250, 240, .96);
}

.pioneer-list span {
  color: var(--coral);
  font: 800 .82rem/1.35 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.pioneer-list h4,
.pioneer-list p {
  margin: 0;
}

.pioneer-list h4 {
  font-size: 1rem;
}

.pioneer-list p {
  color: var(--muted);
  font-size: .9rem;
}

.pioneer-list .pioneer-primary {
  color: var(--paper);
  background: var(--violet);
}

.pioneer-list .pioneer-primary span,
.pioneer-list .pioneer-primary p {
  color: rgba(247, 242, 232, .82);
}

.timeline-intro {
  max-width: 760px;
  margin-bottom: 1.6rem;
}

.history-lanes {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 1rem;
}

.lane-label {
  align-self: start;
  padding: .4rem .5rem;
  color: var(--paper);
  background: var(--green);
  font: 800 .82rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
  text-align: center;
}

.lane-label.czech-label {
  background: var(--coral);
}

.history-lane {
  position: relative;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(8, minmax(132px, 1fr));
  gap: .7rem;
  margin: 0;
  padding: 0 0 .8rem;
  overflow-x: auto;
}

.history-lane::before {
  position: absolute;
  left: 0;
  right: 0;
  top: 20px;
  height: 2px;
  background: rgba(23, 32, 42, .28);
  content: "";
}

.history-lane li {
  position: relative;
  min-width: 132px;
  padding-top: 2.8rem;
}

.history-lane li::before {
  position: absolute;
  left: 8px;
  top: 14px;
  width: 14px;
  height: 14px;
  border: 3px solid var(--paper);
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 2px var(--green);
  content: "";
}

.czech-lane {
  grid-template-columns: repeat(6, minmax(150px, 1fr));
}

.czech-lane li::before {
  background: var(--coral);
  box-shadow: 0 0 0 2px var(--coral);
}

.history-lane time,
.history-lane strong,
.history-lane span {
  display: block;
}

.history-lane time {
  color: var(--violet);
  font: 800 .82rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.history-lane strong {
  margin: .25rem 0;
}

.history-lane span {
  color: var(--muted);
  font-size: .82rem;
}

.access-waves > div {
  max-width: 720px;
}

.access-waves ol {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0 0;
  padding: 0;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.access-waves li {
  min-width: 0;
  padding: 1rem;
  background: var(--panel);
}

.access-waves li > span,
.access-waves strong,
.access-waves small {
  display: block;
}

.access-waves li > span {
  color: var(--coral);
  font: 900 1.3rem/1 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.access-waves strong {
  margin-top: .7rem;
}

.access-waves small {
  color: var(--violet);
  font-weight: 800;
}

.access-waves p {
  margin-bottom: 0;
  font-size: .84rem;
}

.growth-exhibit {
  --chart-world: #0f766e;
  --chart-czech: #c74d3f;
  --chart-speed: #6d4bc3;
  --chart-grid: rgba(23, 32, 42, .14);
}

.growth-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
}

.metric-switch {
  display: inline-flex;
  border: 2px solid var(--ink);
  background: var(--ink);
}

.growth-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .65rem;
  flex-wrap: wrap;
}

.speed-toggle {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem .75rem;
  border: 2px solid var(--ink);
  background: rgba(255, 250, 240, .96);
  font-size: .84rem;
  font-weight: 800;
  cursor: pointer;
}

.speed-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.speed-toggle span {
  position: relative;
  width: 42px;
  height: 22px;
  flex: 0 0 auto;
  border: 2px solid var(--ink);
  background: var(--panel);
}

.speed-toggle span::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: var(--muted);
  transition: transform .18s ease, background .18s ease;
}

.speed-toggle input:checked + span::after {
  background: var(--chart-speed);
  transform: translateX(18px);
}

.speed-toggle input:focus-visible + span {
  outline: 3px solid rgba(109, 75, 195, .35);
  outline-offset: 3px;
}

.metric-switch button {
  min-height: 44px;
  padding: .6rem .85rem;
  border: 0;
  color: var(--ink);
  background: var(--panel);
  font: inherit;
  font-size: .86rem;
  font-weight: 800;
  cursor: pointer;
}

.metric-switch button + button {
  border-left: 1px solid var(--ink);
}

.metric-switch button.is-active {
  color: var(--paper);
  background: var(--violet);
}

.metric-switch button:focus-visible {
  outline: 3px solid rgba(199, 77, 63, .46);
  outline-offset: 3px;
}

.growth-values {
  display: grid;
  grid-template-columns: .65fr repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 1.4rem 0 1rem;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.growth-values div {
  min-width: 0;
  padding: .75rem 1rem;
  background: rgba(255, 250, 240, .96);
}

.growth-values span,
.growth-values strong {
  display: block;
}

.growth-values span {
  color: var(--muted);
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.growth-values strong {
  font: 800 clamp(1.25rem, 3vw, 2rem)/1.2 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.growth-values div:nth-child(2) strong {
  color: var(--chart-world);
}

.growth-values div:nth-child(4) strong {
  color: var(--chart-czech);
}

.growth-values .speed-value strong {
  color: var(--chart-speed);
}

.growth-chart-scroll {
  width: 100%;
  overflow-x: auto;
  border-block: 1px solid rgba(23, 32, 42, .16);
  background: rgba(255, 250, 240, .58);
  overscroll-behavior-inline: contain;
}

.growth-chart-scroll:focus-visible {
  outline: 3px solid rgba(109, 75, 195, .35);
  outline-offset: 3px;
}

.growth-chart {
  display: block;
  width: 100%;
  height: auto;
  min-height: 390px;
}

.growth-chart .grid-line {
  stroke: var(--chart-grid);
  stroke-width: 1;
}

.growth-chart .axis-label,
.growth-chart .tick-label,
.growth-chart .panel-label,
.growth-chart .point-label,
.growth-chart .speed-tick-label,
.growth-chart .speed-axis-label {
  fill: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

.growth-chart .axis-label,
.growth-chart .tick-label {
  fill: var(--muted);
  font-size: 13px;
}

.growth-chart .panel-label {
  font-size: 17px;
  font-weight: 800;
}

.growth-chart .speed-tick-label,
.growth-chart .speed-axis-label {
  fill: var(--chart-speed);
  font-size: 12px;
  font-weight: 800;
}

.growth-chart .speed-axis-tick {
  stroke: var(--chart-speed);
  stroke-width: 1.5;
}

.growth-chart .series-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 4;
}

.growth-chart .series-world {
  stroke: var(--chart-world);
}

.growth-chart .series-czech {
  stroke: var(--chart-czech);
}

.growth-chart .series-speed {
  stroke: var(--chart-speed);
  stroke-width: 3;
  stroke-dasharray: 9 6;
}

.growth-chart .speed-czech {
  opacity: .78;
}

.growth-chart .selected-guide {
  stroke: var(--violet);
  stroke-width: 2;
  stroke-dasharray: 6 5;
}

.growth-chart .selected-point {
  stroke: var(--paper);
  stroke-width: 4;
}

.growth-chart .selected-point.world-point {
  fill: var(--chart-world);
}

.growth-chart .selected-point.czech-point {
  fill: var(--chart-czech);
}

.growth-chart .selected-point.speed-point {
  fill: var(--chart-speed);
  stroke-width: 3;
}

.growth-chart .estimate-line {
  stroke-dasharray: 7 6;
}

.growth-legend {
  display: flex;
  align-items: center;
  gap: .75rem 1.25rem;
  flex-wrap: wrap;
  margin-top: .75rem;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 800;
}

.growth-legend span {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}

.growth-legend i {
  width: 28px;
  height: 0;
  border-top: 4px solid currentColor;
}

.growth-legend .legend-world { color: var(--chart-world); }
.growth-legend .legend-czech { color: var(--chart-czech); }
.growth-legend .legend-speed { color: var(--chart-speed); border-top-style: dashed; border-top-width: 3px; }

.year-control {
  display: grid;
  grid-template-columns: auto 70px minmax(180px, 1fr);
  gap: .8rem;
  align-items: center;
  margin: 1rem 0 0;
  font-weight: 800;
}

.year-control output {
  color: var(--violet);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.year-control input {
  min-height: auto;
  padding: 0;
  accent-color: var(--violet);
}

.growth-note {
  margin: .7rem 0 0;
  color: var(--muted);
  font-size: .82rem;
}

.speed-method-note {
  margin: .35rem 0 0;
  padding-left: .75rem;
  border-left: 3px solid var(--chart-speed);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.55;
}

.origins-sources h3 {
  font-size: 1.25rem;
}

.origins-sources ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .45rem 1.5rem;
  padding-left: 1.2rem;
  color: var(--muted);
}

.origins-sources a {
  color: var(--green);
  font-weight: 800;
}

@media (max-width: 980px) {
  .founders-exhibit {
    grid-template-columns: 1fr;
  }

  .founders-intro {
    position: static;
  }

  .access-waves ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .growth-values {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .internet-web-split,
  .origins-sources ul {
    grid-template-columns: 1fr;
  }

  .pioneer-list section {
    grid-template-columns: 86px minmax(0, 1fr);
  }

  .pioneer-list p {
    grid-column: 2;
  }

  .history-lanes {
    grid-template-columns: 1fr;
    gap: .6rem;
  }

  .czech-label {
    margin-top: 1rem;
  }

  .growth-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .metric-switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .growth-tools,
  .speed-toggle {
    width: 100%;
  }

  .growth-tools {
    justify-content: stretch;
  }

  .speed-toggle {
    justify-content: space-between;
  }

  .growth-chart {
    width: 720px;
    max-width: none;
    min-height: 374px;
  }
}

@media (max-width: 560px) {
  .access-waves ol,
  .growth-values {
    grid-template-columns: 1fr;
  }

  .pioneer-list section {
    grid-template-columns: 1fr;
  }

  .pioneer-list p {
    grid-column: 1;
  }

  .growth-chart {
    min-height: 374px;
  }

  .year-control {
    grid-template-columns: 1fr auto;
  }

  .year-control input {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .origins-section * {
    transition: none !important;
  }
}