/* The project page: a quiet, archival layout with one accent, in light and dark. */
:root {
  color-scheme: light;
  --paper: #f5f5f2;
  --paper-2: #ebece8;
  --ink: #141719;
  --ink-2: #41484c;
  --ink-3: #61696d;
  --rule: #d6d9d6;
  --rule-2: #b4bab9;
  --link: #1d5fae;
  --series-1: #2a78d6;
  --series-2: #eb6834;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #101315;
    --paper-2: #171b1e;
    --ink: #e6e9ea;
    --ink-2: #b6bdc1;
    --ink-3: #8c959a;
    --rule: #262c30;
    --rule-2: #3d464b;
    --link: #7fb2f0;
    --series-1: #3987e5;
    --series-2: #d95926;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #101315;
  --paper-2: #171b1e;
  --ink: #e6e9ea;
  --ink-2: #b6bdc1;
  --ink-3: #8c959a;
  --rule: #262c30;
  --rule-2: #3d464b;
  --link: #7fb2f0;
  --series-1: #3987e5;
  --series-2: #d95926;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.62 var(--sans);
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

p,
ul,
ol {
  margin: 0 0 1em;
}

ul,
ol {
  padding-left: 1.2em;
}

li + li {
  margin-top: 0.35em;
}

strong {
  font-weight: 600;
}

code {
  font: 0.86em var(--mono);
  background: var(--paper-2);
  padding: 0.08em 0.3em;
  border-radius: 3px;
}

.wrap {
  max-width: 66rem;
  margin: 0 auto;
  padding: 0 2rem;
}

.mono,
.kicker,
.rail,
th,
.meta dt,
figcaption b,
.stat span,
.clip-time,
.clip-meta {
  font-family: var(--mono);
  font-feature-settings: "zero" 0;
}

/* Top bar */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--rule);
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.top nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.top a {
  color: var(--ink-2);
  text-decoration: none;
}

.top a:hover {
  color: var(--ink);
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--rule-2);
  background: transparent;
  color: var(--ink-2);
  border-radius: 999px;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--ink);
  border-color: var(--ink-3);
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
  gap: 3rem;
  align-items: end;
  padding: 4.5rem 0 3rem;
}

.kicker {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 1.2rem;
}

h1 {
  font: 400 clamp(4.5rem, 13vw, 8.5rem) / 0.86 var(--serif);
  letter-spacing: -0.015em;
  margin: 0;
}

.subtitle {
  font: italic 400 clamp(1.6rem, 3.4vw, 2.3rem) / 1.15 var(--serif);
  color: var(--ink-2);
  margin: 1rem 0 1.6rem;
  max-width: 26ch;
}

.byline {
  margin: 0;
  color: var(--ink-2);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
  padding: 0;
  list-style: none;
}

.links li + li {
  margin-top: 0;
}

.links a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font: 500 0.8rem/1 var(--mono);
}

.links a:hover {
  border-color: var(--ink);
}

.meta {
  margin: 0;
  border-top: 1px solid var(--ink);
  font-size: 0.875rem;
  line-height: 1.45;
}

.meta div {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
}

.meta dt {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 0.15em;
}

.meta dd {
  margin: 0;
  color: var(--ink-2);
}

/* The staff that sways under the title */

.staff {
  display: block;
  width: 100%;
  height: 5rem;
  margin: 0 0 1rem;
  color: var(--rule-2);
}

.staff .line {
  stroke: currentColor;
  stroke-width: 1;
}

.staff .trace {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
  stroke-linecap: round;
}

/* Lead: abstract and the first clip */

.lead {
  display: grid;
  grid-template-columns: 11rem minmax(0, 44rem);
  gap: 2.5rem;
  padding: 2.5rem 0 3.5rem;
  border-top: 1px solid var(--rule);
}

.lead .abstract {
  font-size: 1.2rem;
  line-height: 1.58;
}

.lead .abstract p:first-child::first-letter {
  font: 400 3.4em/0.8 var(--serif);
  float: left;
  margin: 0.06em 0.1em 0 0;
}

/* Sections */

section {
  display: grid;
  grid-template-columns: 11rem minmax(0, 44rem);
  gap: 2.5rem;
  padding: 3.5rem 0;
  border-top: 1px solid var(--rule);
}

.rail {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  line-height: 1.5;
}

.rail b {
  display: block;
  font: 400 2.6rem/1 var(--serif);
  letter-spacing: 0;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.rail .sticky {
  position: sticky;
  top: 1.5rem;
}

h2 {
  font: 400 clamp(2rem, 4.2vw, 2.7rem) / 1.05 var(--serif);
  letter-spacing: -0.005em;
  margin: 0 0 1.4rem;
}

h3 {
  font: 600 1.0625rem/1.4 var(--sans);
  margin: 2.4rem 0 0.7rem;
}

.body > :last-child {
  margin-bottom: 0;
}

blockquote {
  margin: 1.8rem 0;
  padding: 0.1rem 0 0.1rem 1.3rem;
  border-left: 2px solid var(--ink);
}

blockquote p {
  font: italic 400 1.6rem/1.25 var(--serif);
  margin: 0 0 0.5rem;
}

blockquote footer {
  font: 400 0.75rem/1.4 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.note {
  font-size: 0.9375rem;
  color: var(--ink-2);
  border-top: 1px solid var(--rule);
  padding-top: 0.8rem;
}

/* Figures */

figure {
  margin: 2rem 0;
}

figcaption {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-2);
  margin-top: 0.8rem;
}

figcaption b {
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin-right: 0.4rem;
}

.shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

/* Tables */

.table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.4;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.9rem 0.55rem 0;
  border-bottom: 1px solid var(--rule);
}

th {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-bottom-color: var(--ink);
}

td.num {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

tr.pick td {
  font-weight: 600;
}

td.none {
  color: var(--ink-3);
  font-style: italic;
}

/* Two axes */

.axes {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: 0;
  margin: 2rem 0 0;
}

.axes .y {
  grid-row: 1 / 3;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  justify-self: center;
  align-self: center;
}

.axes .x {
  grid-column: 2 / 4;
  text-align: center;
  padding-top: 0.6rem;
}

.axes .y,
.axes .x {
  font: 400 0.7rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.cell {
  border: 1px solid var(--rule-2);
  margin: -1px 0 0 -1px;
  padding: 1rem 1.1rem 1.1rem;
  min-height: 9rem;
}

.cell small {
  display: block;
  font: 400 0.7rem/1.3 var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.5rem;
}

/* The sans, because the serif's 1 reads as an l at this size ("V1's"). */
.cell strong {
  display: block;
  font: 600 1.0625rem/1.25 var(--sans);
  margin-bottom: 0.35rem;
}

.cell span {
  font-size: 0.875rem;
  color: var(--ink-2);
  line-height: 1.45;
  display: block;
}

.cell.goal {
  border: 2px solid var(--ink);
  position: relative;
  z-index: 1;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.8rem 0;
}

.split > div {
  border-top: 1px solid var(--ink);
  padding-top: 0.8rem;
}

.split h4 {
  margin: 0 0 0.4rem;
  font: 400 0.75rem/1.3 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.split p {
  margin: 0;
  font-size: 0.9375rem;
}

/* The branch diagram */

/* Capped, so that its text stays near body size on a wide screen. */
.branch svg {
  display: block;
  width: 100%;
  max-width: 34rem;
  height: auto;
}

.branch .trunk,
.branch .arm {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2;
  stroke-linecap: round;
}

.branch .arm.seed {
  stroke-dasharray: 2 6;
}

.branch .dot {
  fill: var(--ink);
  stroke: var(--paper);
  stroke-width: 3;
}

.branch text {
  fill: var(--ink-2);
  font: 400 16px var(--sans);
}

.branch text.tag {
  fill: var(--ink-3);
  font: 500 12.5px var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.branch .brace {
  fill: none;
  stroke: var(--rule-2);
  stroke-width: 1;
}

/* Clips */

.clips {
  display: grid;
  gap: 0.6rem;
  margin: 1.4rem 0 0;
}

.clips.two {
  grid-template-columns: 1fr 1fr;
}

.grid3 {
  display: grid;
  grid-template-columns: 6.5rem repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  align-items: stretch;
  margin-top: 1.4rem;
}

.grid3 .head {
  font: 400 0.7rem/1.35 var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  align-self: end;
  padding-bottom: 0.1rem;
}

.grid3 .row-label {
  font: 400 1.25rem/1.1 var(--serif);
  align-self: center;
}

.clip {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 0.75rem;
  align-items: center;
  padding: 0.7rem 0.85rem;
  background: var(--paper-2);
  border-radius: 8px;
  min-width: 0;
}

.clip-play {
  grid-row: 1 / 3;
  appearance: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}

.clip-play:hover,
.clip.playing .clip-play {
  background: var(--ink);
  color: var(--paper);
}

.clip-play svg {
  width: 0.9rem;
  height: 0.9rem;
  fill: currentColor;
}

.clip-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  min-width: 0;
}

.clip-label {
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.3;
  min-width: 0;
}

.clip-time,
.clip-meta {
  font-size: 0.7rem;
  color: var(--ink-3);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.clip-seek {
  width: 100%;
  margin: 0.45rem 0 0;
  height: 1rem;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  --done: 0%;
}

.clip-seek::-webkit-slider-runnable-track {
  height: 2px;
  background: linear-gradient(
    to right,
    var(--ink) var(--done),
    var(--rule-2) var(--done)
  );
}

.clip-seek::-moz-range-track {
  height: 2px;
  background: var(--rule-2);
}

.clip-seek::-moz-range-progress {
  height: 2px;
  background: var(--ink);
}

.clip-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper-2);
}

.clip-seek::-moz-range-thumb {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--paper-2);
}

.grid3 .clip {
  grid-template-columns: 2.1rem minmax(0, 1fr);
  padding: 0.6rem 0.7rem;
}

.grid3 .clip-play {
  width: 2.1rem;
  height: 2.1rem;
}

/* Stats */

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 1.8rem 0;
  border-top: 1px solid var(--ink);
}

.stat {
  padding: 0.8rem 0.9rem 0.9rem 0;
  border-bottom: 1px solid var(--rule);
}

.stat strong {
  display: block;
  font: 500 2rem/1.05 var(--sans);
  letter-spacing: -0.01em;
}

.stat span {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 0.35rem;
  line-height: 1.4;
}

/* Charts */

.chart {
  position: relative;
  margin-top: 1rem;
}

.chart svg {
  display: block;
  width: 100%;
  overflow: visible;
}

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

.chart .base {
  stroke: var(--rule-2);
  stroke-width: 1;
}

.chart .tick {
  fill: var(--ink-3);
  font: 400 11px var(--mono);
  font-variant-numeric: tabular-nums;
}

.chart .cat {
  fill: var(--ink-2);
  font: 400 12px var(--sans);
}

.chart .cat.pick {
  fill: var(--ink);
  font-weight: 600;
}

.chart .val {
  fill: var(--ink-2);
  font: 500 11px var(--mono);
}

.chart .s1 {
  fill: var(--series-1);
}

.chart .s2 {
  fill: var(--series-2);
}

.chart .link {
  stroke: var(--rule-2);
  stroke-width: 2;
}

.chart .dot {
  stroke: var(--paper);
  stroke-width: 2;
}

.chart .hit {
  fill: transparent;
  cursor: default;
}

.chart .hit:hover + .mark,
.chart .hit:focus + .mark,
.chart .mark.on {
  filter: brightness(1.12);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  color: var(--ink-2);
}

.legend li + li {
  margin-top: 0;
}

.legend i {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 2px;
  margin-right: 0.4rem;
  vertical-align: -0.05rem;
}

.legend .dotkey {
  border-radius: 50%;
}

.legend .s1 {
  background: var(--series-1);
}

.legend .s2 {
  background: var(--series-2);
}

.tip {
  position: absolute;
  pointer-events: none;
  background: var(--paper);
  border: 1px solid var(--rule-2);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  font-size: 0.8rem;
  line-height: 1.35;
  box-shadow: 0 4px 16px rgb(0 0 0 / 0.08);
  white-space: nowrap;
  z-index: 5;
  transform: translate(-50%, calc(-100% - 10px));
}

.tip strong {
  display: block;
  font: 600 0.95rem/1.2 var(--sans);
}

.tip span {
  color: var(--ink-3);
  font-weight: 400;
}

.tip i {
  display: inline-block;
  width: 0.8rem;
  height: 2px;
  margin-right: 0.35rem;
  vertical-align: middle;
}

details {
  margin-top: 0.6rem;
  font-size: 0.875rem;
}

summary {
  cursor: pointer;
  color: var(--ink-3);
  font: 400 0.75rem/1.6 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

details .table-scroll {
  margin: 0.6rem 0 0;
}

/* System */

.system {
  display: grid;
  grid-template-columns:
    minmax(0, 1fr) 4.4rem minmax(0, 1.2fr) 4.4rem
    minmax(0, 0.9fr);
  align-items: stretch;
  margin: 2rem 0 0;
}

.box {
  border: 1px solid var(--rule-2);
  border-radius: 8px;
  padding: 0.9rem 1rem 1rem;
}

.box.dashed {
  border-style: dashed;
}

.box h4 {
  margin: 0 0 0.15rem;
  font: 400 1.3rem/1.15 var(--serif);
}

.box .where {
  font: 400 0.68rem/1.3 var(--mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.7rem;
}

.box ol {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--ink-2);
}

.box ol li {
  padding: 0.4rem 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.wire {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-3);
  font: 400 0.62rem/1.25 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
}

.wire svg {
  width: 100%;
  height: 12px;
  stroke: var(--ink-3);
  fill: none;
  stroke-width: 1.2;
}

/* Timeline */

.timeline {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  border-top: 1px solid var(--ink);
}

.timeline li {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule);
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.45;
}

.timeline time {
  font: 400 0.75rem/1.9 var(--mono);
  color: var(--ink-3);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.timeline li.turn span {
  font-weight: 600;
}

/* Footer */

.foot {
  border-top: 1px solid var(--ink);
  padding: 1.5rem 0 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font: 400 0.75rem/1.6 var(--mono);
  color: var(--ink-3);
}

.foot a {
  color: var(--ink-2);
}

/* Narrow screens */

@media (max-width: 860px) {
  .wrap {
    padding: 0 16px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    padding-top: 3rem;
  }

  .lead,
  section {
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
  }

  .rail b {
    display: inline;
    font-size: 1rem;
    font-family: var(--mono);
    margin: 0 0.6rem 0 0;
  }

  .rail .sticky {
    position: static;
  }

  .system {
    grid-template-columns: minmax(0, 1fr);
  }

  .wire {
    flex-direction: row;
    padding: 0.5rem 0;
  }

  .wire svg {
    width: 12px;
    height: 28px;
    transform: rotate(90deg);
  }

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

@media (max-width: 640px) {
  body {
    font-size: 1rem;
  }

  .lead .abstract {
    font-size: 1.0625rem;
  }

  .top nav a.wide {
    display: none;
  }

  .clips.two,
  .split {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid3 .head {
    display: none;
  }

  .grid3 .row-label {
    margin-top: 0.8rem;
  }

  .axes {
    grid-template-columns: 1.4rem minmax(0, 1fr) minmax(0, 1fr);
  }

  .cell {
    padding: 0.75rem;
    min-height: 0;
  }

  .cell strong {
    font-size: 0.95rem;
  }

  .cell span {
    font-size: 0.8rem;
  }

  .timeline li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.1rem;
  }

  blockquote p {
    font-size: 1.35rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .staff .trace {
    animation: sway 9s ease-in-out infinite alternate;
    transform-origin: 50% 50%;
  }

  @keyframes sway {
    from {
      transform: translateY(-6px);
    }
    to {
      transform: translateY(6px);
    }
  }
}