@font-face {
  font-family: Space;
  src: url("../fonts/SpaceGrotesk.ttf") format("truetype");
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: Tech;
  src: url("../fonts/ShareTechMono.ttf") format("truetype");
  font-display: swap;
}
:root {
  --bg: #050507;
  --panel: #101018;
  --inset: #08080e;
  --fg: #ededf4;
  --dim: #a0a0c0;
  --line: #333342;
  --pink: #ff3d88;
  --blue: #00e0ff;
  --green: #adca93;
  --grid: #1b1b29;
  color-scheme: dark;
  font-family: Space, system-ui, sans-serif;
  font-synthesis: none;
}
:root[data-theme="tda-light"] {
  --bg: #ece9e1;
  --panel: #f4f2ec;
  --inset: #e6e3db;
  --fg: #14161b;
  --dim: #454850;
  --line: #bcb9b0;
  --pink: #a11350;
  --blue: #1f5f5a;
  --green: #426326;
  --grid: #d9d6cd;
  color-scheme: light;
}
:root[data-theme="field-guide"] {
  --bg: #e9e5d9;
  --panel: #f5f1e6;
  --inset: #e5e2d5;
  --fg: #203930;
  --dim: #526359;
  --line: #a6afa0;
  --pink: #8b493d;
  --blue: #316658;
  --green: #6d702f;
  --grid: #d6dbca;
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
}
a {
  color: inherit;
}
button,
select,
input {
  font: inherit;
}
button,
select {
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 5px;
}
button {
  cursor: pointer;
}
button:hover,
select:hover {
  border-color: var(--dim);
}
button:disabled {
  opacity: 0.38;
  cursor: default;
}
button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 4px;
}
button,
select {
  min-height: 40px;
}
select {
  padding: 7px 10px;
}
p {
  line-height: 1.65;
  margin: 0 0 1rem;
}
h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  font-weight: 500;
}
h2 {
  font-size: 28px;
}
h3 {
  font-size: 23px;
}
main,
.masthead,
footer {
  max-width: 1480px;
  margin: auto;
  padding-left: 48px;
  padding-right: 48px;
}
.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-size: 20px;
  text-decoration: none;
  letter-spacing: -0.6px;
}
.brand span {
  font-size: 12px;
  color: var(--dim);
  margin-left: 18px;
  letter-spacing: 0;
}
.appearance {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--dim);
}
.intro {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 6%;
  padding: 62px 0 48px;
  align-items: end;
}
.eyebrow {
  font-size: 13px;
  color: var(--dim);
  margin-bottom: 15px;
}
.intro h1 {
  font-size: clamp(72px, 8.5vw, 126px);
  letter-spacing: -8px;
  line-height: 0.88;
  font-weight: 600;
}
.title-wave {
  font-weight: 300;
  color: var(--blue);
  font-size: 0.85em;
  display: inline-block;
  vertical-align: 12%;
  margin-left: 25px;
  letter-spacing: 0;
}
.standfirst {
  font-size: clamp(18px, 1.8vw, 25px);
  line-height: 1.45;
  margin-top: 26px;
  margin-bottom: 0;
  letter-spacing: -0.6px;
}
.intro-aside {
  max-width: 370px;
  justify-self: end;
  color: var(--dim);
  font-size: 15px;
}
.instrument-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--blue);
  color: var(--fg);
  padding: 10px 0;
  text-decoration: none;
  font-size: 15px;
}
.instrument-link span {
  color: var(--blue);
  font-size: 23px;
}
.guide-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  margin: 12px 0 22px;
}
.guide-heading h2 {
  font-size: 22px;
}
.guide-heading > span {
  font-size: 11px;
  color: var(--dim);
}
#chapters {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
  gap: 0;
}
#chapters button {
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  padding: 16px 9px;
  text-align: left;
  font-size: 12px;
  display: flex;
  gap: 9px;
  align-items: center;
}
#chapters button span {
  font-family: Tech, monospace;
  color: var(--dim);
}
#chapters button[aria-current="step"] {
  border-bottom-color: var(--blue);
  background: var(--panel);
}
#chapters button[aria-current="step"] span {
  color: var(--blue);
}
.guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(290px, 1fr);
  border: 1px solid var(--line);
  border-top: 0;
  min-height: 555px;
}
.visual {
  background: var(--panel);
  padding: 22px 24px 16px;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.visual-heading {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-family: Tech, monospace;
  font-size: 12px;
  color: var(--dim);
  margin-bottom: 4px;
}
.legend {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: Space, sans-serif;
  font-size: 10px;
}
.legend i {
  width: 5px;
  height: 5px;
  border-radius: 100%;
  background: var(--blue);
}
#scene {
  flex: 1;
  display: grid;
  align-items: center;
  min-height: 325px;
}
#scene svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 370px;
  overflow: visible;
}
svg text {
  font-family: Space, sans-serif;
  fill: var(--fg);
  font-size: 14px;
}
svg .tiny {
  font-family: Tech, monospace;
  font-size: 11px;
  fill: var(--dim);
}
svg .small {
  font-size: 12px;
  fill: var(--dim);
}
svg .big {
  font-size: 22px;
}
svg .box {
  fill: var(--inset);
  stroke: var(--line);
  stroke-width: 1.2;
}
svg .accent-box {
  fill: var(--inset);
  stroke: var(--pink);
  stroke-width: 1.5;
}
svg .wire {
  fill: none;
  stroke: var(--line);
  stroke-width: 2;
}
svg .signal {
  fill: none;
  stroke: var(--pink);
  stroke-width: 2;
}
svg .control {
  fill: none;
  stroke: var(--blue);
  stroke-width: 1.6;
  stroke-dasharray: 5 5;
}
svg .wave {
  fill: none;
  stroke: var(--pink);
  stroke-width: 2.5;
}
svg .grid {
  stroke: var(--grid);
  stroke-width: 1;
}
svg .blue {
  fill: var(--blue);
}
svg .pink {
  fill: var(--pink);
}
svg .dim {
  fill: var(--dim);
}
#interaction {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  min-height: 52px;
  padding: 5px 0 10px;
}
#interaction button {
  padding: 7px 14px;
  font-size: 12px;
}
#interaction button[aria-pressed="true"] {
  border-color: var(--pink);
  color: var(--pink);
}
#interaction label {
  font-size: 12px;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
#interaction input[type="range"] {
  width: 210px;
  accent-color: var(--pink);
}
#interaction output {
  font-family: Tech, monospace;
  min-width: 35px;
}
.pan-hint {
  display: none;
}
.caption {
  font-size: 11px;
  color: var(--dim);
  line-height: 1.5;
  margin: 6px 0 0;
  max-width: 70ch;
  min-height: 32px;
}
.reader {
  padding: 28px 28px 18px;
  border-left: 1px solid var(--line);
}
#chapter-position {
  font-family: Tech, monospace;
  font-size: 12px;
  margin-bottom: 15px;
  color: var(--blue);
}
.reader h3 {
  font-size: 27px;
  line-height: 1.17;
  letter-spacing: -0.6px;
}
.dek {
  color: var(--dim);
  font-size: 14px;
  margin: 15px 0 18px;
}
#transcript {
  font-size: 14px;
  line-height: 1.75;
  max-width: 65ch;
}
.reader details {
  font-size: 12px;
  border-top: 1px solid var(--line);
  padding-top: 15px;
  margin-top: 24px;
}
.reader summary {
  cursor: pointer;
  line-height: 1.5;
}
.reader details p {
  margin-top: 15px;
  color: var(--dim);
}
.evidence {
  font-size: 11px;
}
.transport {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  border: 1px solid var(--line);
  border-top: 0;
  padding: 14px 16px;
  background: var(--panel);
}
.transport-main {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
.transport button {
  padding: 7px 12px;
  background: var(--inset);
}
.transport .play {
  min-width: 143px;
  border-color: var(--blue);
  font-size: 12px;
}
.transport-options {
  display: flex;
  gap: 8px;
}
.transport select {
  font-size: 11px;
  background: var(--inset);
}
#time {
  font-family: Tech, monospace;
  color: var(--dim);
  font-size: 11px;
  white-space: nowrap;
  margin: 0 5px;
}
.seek-label {
  flex: 1;
  min-width: 60px;
}
#seek {
  width: 100%;
  accent-color: var(--blue);
  cursor: pointer;
}
.playback-note {
  font-size: 11px;
  color: var(--dim);
  padding: 10px 0;
  min-height: 40px;
}
.recording-section {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 40px;
  padding: 60px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.recording {
  min-width: 0;
}
.recording video {
  width: 100%;
  display: block;
  max-height: 460px;
  background: #000;
  border: 1px solid var(--line);
}
.recording-copy {
  max-width: 48ch;
}
.recording-copy h2 {
  font-size: 33px;
  letter-spacing: -1px;
  margin-bottom: 22px;
}
.recording-copy p:not(.eyebrow) {
  font-size: 14px;
  color: var(--dim);
}
.state-section {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 45px;
  padding: 50px 0 65px;
}
.state-section h2 {
  font-size: 25px;
  margin-bottom: 17px;
}
.state-section h3 {
  font-size: 17px;
  margin-bottom: 16px;
}
.state-section p {
  font-size: 13px;
  color: var(--dim);
}
.state-section .small {
  font-size: 11px;
}
footer {
  display: flex;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 25px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--dim);
}
.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;
}
.skip {
  position: absolute;
  top: -100px;
  left: 15px;
  padding: 15px;
  background: var(--bg);
  z-index: 10;
}
.skip:focus {
  top: 10px;
}
@media (min-width: 1500px) {
  .intro {
    padding-top: 72px;
  }
}
@media (max-width: 1050px) {
  main,
  .masthead,
  footer {
    padding-left: 24px;
    padding-right: 24px;
  }
  .guide-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(270px, 1fr);
  }
  .reader {
    padding: 23px 20px;
  }
  .visual {
    padding: 20px 16px;
  }
  .transport {
    flex-wrap: wrap;
    gap: 10px;
  }
  .transport-main {
    flex-basis: 100%;
  }
  .transport-options {
    margin-left: auto;
  }
  .reader h3 {
    font-size: 24px;
  }
  .intro h1 {
    letter-spacing: -6px;
  }
  .title-wave {
    margin-left: 10px;
  }
  #chapters button {
    font-size: 11px;
    gap: 5px;
  }
}
@media (max-width: 760px) {
  main,
  .masthead,
  footer {
    padding-left: 18px;
    padding-right: 18px;
  }
  .masthead {
    padding-top: 18px;
    padding-bottom: 18px;
  }
  .brand {
    font-size: 17px;
  }
  .brand span {
    display: block;
    margin: 4px 0 0;
    font-size: 10px;
  }
  .appearance {
    font-size: 0;
  }
  .appearance select {
    font-size: 11px;
    max-width: 135px;
  }
  .intro {
    grid-template-columns: 1fr;
    padding: 38px 0 35px;
    gap: 25px;
  }
  .intro h1 {
    font-size: 80px;
    letter-spacing: -6px;
  }
  .standfirst {
    font-size: 19px;
  }
  .intro-aside {
    justify-self: start;
    max-width: 48ch;
    font-size: 13px;
  }
  .instrument-link {
    max-width: 240px;
  }
  .guide-heading h2 {
    font-size: 19px;
  }
  .guide-heading > span {
    font-size: 10px;
  }
  #chapters {
    grid-template-columns: repeat(3, 1fr);
  }
  #chapters button {
    padding: 13px 7px;
    font-size: 11px;
  }
  .guide-grid {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .visual {
    padding: 16px 12px 12px;
  }
  .visual-heading {
    font-size: 10px;
  }
  .legend {
    font-size: 9px;
  }
  #scene {
    min-height: 260px;
  }
  #scene svg {
    min-width: 0;
  }
  #interaction {
    margin-top: 4px;
  }
  #interaction button {
    font-size: 11px;
    min-height: 42px;
    padding: 8px 12px;
  }
  .caption {
    font-size: 11px;
    min-height: 0;
    margin-top: 8px;
  }
  .reader {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 23px 21px;
  }
  .reader h3 {
    font-size: 27px;
  }
  #transcript {
    font-size: 14px;
  }
  .reader details {
    margin-top: 15px;
  }
  .transport {
    padding: 10px;
  }
  .transport-main {
    flex-wrap: wrap;
  }
  .transport .play {
    min-width: 132px;
  }
  #time {
    margin-left: auto;
  }
  .seek-label {
    flex-basis: 100%;
    padding-top: 8px;
  }
  .transport-options {
    margin-left: 0;
    width: 100%;
    justify-content: space-between;
  }
  .recording-section {
    grid-template-columns: 1fr;
    gap: 25px;
    padding: 35px 0;
  }
  .recording-copy {
    max-width: 100%;
  }
  .recording-copy h2 {
    font-size: 28px;
  }
  .state-section {
    grid-template-columns: 1fr;
    gap: 23px;
    padding: 35px 0 40px;
  }
  .state-section p {
    max-width: 65ch;
  }
  footer {
    font-size: 10px;
  }
  .title-wave {
    margin-left: 15px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}

@media (max-width: 760px) {
  #scene {
    display: block;
    overflow-x: auto;
    min-height: 340px;
    margin-top: 14px;
  }
  #scene svg {
    width: 640px;
    min-width: 640px;
    height: 338px;
  }
  .pan-hint {
    display: block;
    margin: 0 0 6px;
    font-size: 10px;
    color: var(--dim);
  }
}