/* The Hatch guide and the Agent page share these tokens. */
:root {
  --black: #0a0a0a;
  --charcoal: #1a1a18;
  --paper: #f5f5f1;
  --body: #c9c9c2;
  --muted: #9a9a94;
  --line: #3a3a3a;
  --track: #2a2a2a;
  --bar: #4a4a46;
  --accent: #e9c534;
  --sans: 'Libre Franklin', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --gutter: clamp(20px, 6.67vw, 96px);
  --header: 64px;
}

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

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

body {
  margin: 0;
  background: var(--black);
  color: var(--body);
  font-family: var(--sans);
  font-weight: 350;
  font-size: 18px;
  line-height: 30px;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
p,
ol,
ul,
dl,
dd,
figure {
  margin: 0;
  padding: 0;
}

ol,
ul {
  list-style: none;
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.on-yellow :focus-visible,
.on-paper :focus-visible {
  outline-color: var(--black);
}

.mono {
  font-family: var(--mono);
  font-weight: 400;
}

.label {
  font-size: 14px;
  line-height: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.label.accent {
  color: var(--accent);
}

/* ---------- Progress bar ---------- */

.progress {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header);
  display: flex;
  align-items: center;
  gap: 32px;
  padding-inline: var(--gutter);
  background: var(--black);
}

.progress img {
  display: block;
  height: 28px;
  width: auto;
}

.progress-track {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--track);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 10%;
  border-radius: 2px;
  background: var(--accent);
  transition: width 0.4s ease;
}

.progress-count {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 18px;
  color: var(--paper);
  white-space: nowrap;
}

/* ---------- Panels ---------- */

.panel {
  position: sticky;
  top: var(--header);
  min-height: calc(100vh - var(--header));
  min-height: calc(100svh - var(--header));
  display: flex;
  gap: clamp(40px, 6.67vw, 96px);
  padding: 140px var(--gutter) 200px;
  border-radius: 48px 48px 0 0;
  background: var(--black);
}

.panel:first-child {
  border-radius: 0;
  padding-top: 120px;
}

/* The "what changed" panel shows for a visit that arrives at #new, which is how Hatch opens the guide after an update. */
.panel.whats-new {
  display: none;
}

.show-new .panel.whats-new {
  display: flex;
}

.whats-new .numeral {
  font-size: clamp(40px, 5vw, 72px);
}

.whats-new .pill.big {
  align-self: flex-start;
}

/* While that panel is hidden, stage 1 is the top of the page. */
html:not(.show-new) .panel.whats-new + .panel {
  border-radius: 0;
  padding-top: 120px;
}

.panel.charcoal {
  background: var(--charcoal);
}

.panel.on-yellow {
  background: var(--accent);
  color: var(--black);
}

.panel.on-paper {
  background: var(--paper);
  color: var(--black);
}

.panel-side {
  flex: 0 0 clamp(240px, 27.8vw, 400px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 64px;
}

.numeral {
  font-size: clamp(180px, 22.2vw, 320px);
  line-height: 0.78;
  font-weight: 250;
  letter-spacing: -0.07em;
  color: var(--accent);
  margin-left: -0.04em;
  white-space: nowrap;
  flex: none;
  position: sticky;
  top: calc(var(--header) + 56px);
}

.on-yellow .numeral {
  color: var(--black);
}

.side-note {
  font-size: 16px;
  line-height: 26px;
  color: var(--muted);
  max-width: 320px;
}

.side-note strong {
  display: block;
  font-weight: 350;
}

.on-yellow .side-note {
  color: var(--black);
  font-weight: 400;
}

.panel-main {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 64px;
}

.headline {
  font-size: clamp(44px, 5.6vw, 80px);
  line-height: 1.04;
  font-weight: 650;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.headline.large {
  font-size: clamp(46px, 6.4vw, 92px);
  line-height: 1.02;
}

.headline.poster {
  font-size: clamp(52px, 8.9vw, 128px);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.on-yellow .headline,
.on-paper .headline {
  color: var(--black);
}

.subhead {
  margin-top: -32px;
  font-size: clamp(28px, 3.3vw, 48px);
  line-height: 1.125;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--accent);
  max-width: 620px;
}

.lede {
  font-size: 22px;
  line-height: 36px;
  max-width: 620px;
}

.lede + .lede {
  margin-top: -40px;
}

.aside {
  font-size: 17px;
  line-height: 28px;
  color: var(--muted);
  max-width: 620px;
  margin-top: -32px;
}

/* ---------- Diagrams ---------- */

.rows {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
}

.row {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-block: 28px;
  border-top: 1px solid var(--line);
}

.row .label {
  flex: 0 0 90px;
}

.row-text {
  flex: 0 0 300px;
  font-size: 20px;
  line-height: 24px;
}

.row-text.strong {
  color: var(--paper);
  font-weight: 600;
}

.row-bar {
  flex: 1;
  height: 20px;
  position: relative;
}

.row-bar i {
  position: absolute;
  top: 0;
  bottom: 0;
  border-radius: 10px;
  background: var(--bar);
}

.row-bar i.accent {
  background: var(--accent);
}

.compare {
  display: flex;
  gap: 24px;
}

.compare > div {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.compare .mock {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock i {
  display: block;
  height: 12px;
  border-radius: 6px;
  background: var(--bar);
}

.mock i.tall {
  height: 28px;
  width: 70%;
  background: var(--paper);
}

.mock i.pill {
  width: 110px;
  height: 32px;
  border-radius: 16px;
  background: none;
  border: 1px solid var(--paper);
}

.outline {
  font-family: var(--mono);
  font-size: 14px;
  line-height: 26px;
  color: var(--paper);
  white-space: pre-wrap;
  margin: 0;
}

.outline b {
  font-weight: 400;
  color: var(--accent);
}

.sample-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 48px;
  border: 1px solid var(--paper);
  border-radius: 12px;
}

.sample-card h3 {
  font-size: 34px;
  line-height: 42px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 520px;
  padding-right: 56px;
}

.sample-card p {
  font-size: 18px;
  line-height: 28px;
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 46px;
  padding-inline: 24px;
  border: 1px solid currentColor;
  border-radius: 23px;
  background: none;
  color: var(--paper);
  font-size: 15px;
  line-height: 18px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.pill:hover {
  background: var(--paper);
  color: var(--black);
}

.pill.big {
  height: 64px;
  padding-inline: 30px;
  border-radius: 32px;
  font-size: 19px;
  font-weight: 550;
}

.pill.big span {
  color: var(--accent);
  font-size: 22px;
}

.pin {
  position: absolute;
  top: 40px;
  right: 40px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 22px 22px 22px 4px;
  background: var(--accent);
  color: var(--black);
  font-size: 17px;
  font-weight: 700;
}

.readout {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.readout-size {
  font-size: clamp(56px, 8.3vw, 120px);
  line-height: 0.9;
  font-weight: 250;
  letter-spacing: -0.05em;
  color: var(--accent);
  white-space: nowrap;
}

.readout p {
  font-size: 16px;
  line-height: 24px;
  color: var(--muted);
}

.table {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 22px;
}

.table > div {
  display: flex;
  gap: 24px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
}

.table span {
  flex: 1 1 0;
  min-width: 0;
}

.table span:nth-child(2) {
  color: var(--paper);
}

.table span:nth-child(3) {
  flex: 0 0 60px;
}

.table span:nth-child(4) {
  flex: 0 0 90px;
  font-family: var(--sans);
}

.table .running {
  color: var(--accent);
}

.layers {
  display: flex;
  align-items: center;
  gap: 32px;
}

.layers > .mock {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px;
  border: 1px solid var(--paper);
  border-radius: 12px;
}

.layers > .arrow {
  color: var(--accent);
  font-size: 28px;
}

.layers ul {
  flex: 1 1 0;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 30px;
  color: var(--paper);
}

.layers li + li {
  padding-left: 20px;
  border-top: 1px solid var(--line);
}

.layers li em {
  font-style: normal;
  color: var(--muted);
  margin-right: 12px;
}

.practice {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 440px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.practice label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 15px;
  line-height: 18px;
  color: var(--muted);
}

.field {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--black);
  color: var(--paper);
  font-size: 17px;
  line-height: 26px;
}

.field::placeholder {
  color: var(--muted);
}

.practice .pill {
  align-self: flex-start;
}

.answer {
  font-size: 17px;
  line-height: 27px;
  color: var(--muted);
}

.answer.live {
  color: var(--accent);
  font-weight: 500;
}

.four {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.four > div {
  flex: 1 1 50%;
  min-width: 260px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 32px 28px 0;
  border-top: 1px solid var(--line);
}

.four h3 {
  font-size: 20px;
  line-height: 26px;
  font-weight: 600;
  color: var(--paper);
}

.four p {
  font-size: 17px;
  line-height: 27px;
}

/* ---------- Large copies of Hatch's controls ---------- */

.controls-block {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 32px 20px;
}

.control {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  width: 168px;
  font-size: 15px;
  line-height: 22px;
  color: var(--muted);
}

.control[data-size] {
  width: 130px;
}

.control.wide {
  width: auto;
  max-width: 480px;
}

.control.wide > span:last-child {
  max-width: 340px;
}

.control b {
  font-size: 17px;
  line-height: 24px;
  font-weight: 600;
  color: var(--paper);
}

.disc {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  margin-bottom: 12px;
  border: 1.5px solid var(--paper);
  border-radius: 40px;
  color: var(--paper);
}

.disc.pair {
  width: auto;
  gap: 16px;
  padding-inline: 24px;
}

.disc.pair em {
  width: 1.5px;
  height: 32px;
  background: var(--line);
}

.disc.small {
  width: 56px;
  height: 56px;
  margin-bottom: 8px;
}

.control.primary .disc,
.control.active .disc {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.replica {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-height: 80px;
  margin-bottom: 12px;
  padding: 16px 32px 16px 26px;
  border: 1.5px solid var(--paper);
  border-radius: 40px;
  color: var(--paper);
  font-size: 20px;
  line-height: 26px;
  font-weight: 600;
  white-space: nowrap;
}

.replica svg {
  flex: none;
}

.switch-replica {
  padding-left: 32px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 500;
}

.switch-replica i {
  flex: none;
  position: relative;
  width: 52px;
  height: 30px;
  border-radius: 15px;
  background: var(--bar);
}

.switch-replica i::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 22px;
  height: 22px;
  border-radius: 11px;
  background: var(--paper);
}

.then {
  line-height: 80px;
  font-size: 24px;
  color: var(--accent);
}

.tab-replica {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  align-self: flex-start;
  height: 56px;
  margin-bottom: 8px;
  padding-inline: 22px 18px;
  border: 1.5px solid var(--paper);
  border-radius: 28px;
  color: var(--paper);
  font-size: 17px;
  font-weight: 600;
}

.tab-replica em {
  font-style: normal;
  font-weight: 350;
  font-size: 22px;
  color: var(--muted);
}

.on-yellow .control,
.on-paper .control {
  color: var(--black);
}

.on-yellow .control b,
.on-paper .control b,
.on-yellow .label,
.on-yellow .disc,
.on-paper .disc {
  color: var(--black);
  border-color: var(--black);
}

.on-yellow .control.primary .disc {
  background: var(--black);
  color: var(--accent);
}

.on-yellow .then {
  color: var(--black);
}

/* ---------- Stage 3 ---------- */

.esc {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-top: 40px;
  border-top: 1.5px solid var(--black);
  margin-top: auto;
}

.keycap {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 88px;
  padding-inline: 34px;
  border: 0;
  border-radius: 16px;
  background: var(--black);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 30px;
  line-height: 36px;
}

.esc p {
  font-size: 26px;
  line-height: 36px;
  font-weight: 400;
}

.after {
  display: none;
  flex-direction: column;
  gap: 40px;
  padding-top: 40px;
  border-top: 1.5px solid var(--black);
}

.revealed .after {
  display: flex;
  animation: rise 0.7s ease both;
}

.revealed .esc {
  display: none;
}

.after h3 {
  font-size: clamp(30px, 3.3vw, 48px);
  line-height: 1.12;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.after p {
  font-size: 22px;
  line-height: 36px;
  font-weight: 400;
  max-width: 620px;
}

.canvas-diagram {
  display: flex;
  align-items: center;
  gap: 32px;
}

.canvas-diagram > div {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.canvas-diagram .frame {
  height: 160px;
  display: flex;
  gap: 12px;
  padding: 0;
  border: 1.5px solid var(--black);
  border-radius: 12px;
}

.canvas-diagram .frame.canvas {
  align-items: center;
  justify-content: center;
  border-style: dashed;
}

.canvas-diagram .frame.canvas i {
  width: 30%;
  height: 60%;
  border-radius: 8px;
  background: var(--black);
}

.canvas-diagram .frame.canvas i + i {
  width: 16%;
}

.canvas-diagram .frame.full {
  background: var(--black);
}

.canvas-diagram span {
  font-size: 15px;
  line-height: 20px;
  font-weight: 500;
}

.canvas-diagram .arrow {
  flex: none;
  font-size: 28px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Try it, Done it! ---------- */

.try {
  display: flex;
  align-items: center;
  gap: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}

.on-yellow .try {
  border-top: 1.5px solid var(--black);
}

.try-text {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.try-text p {
  font-size: 24px;
  line-height: 36px;
  font-weight: 400;
  color: var(--paper);
}

.on-yellow .try-text p,
.on-yellow .try .label {
  color: var(--black);
}

.done-wrap {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.done {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 88px;
  padding: 0 44px 0 28px;
  border: 0;
  border-radius: 44px;
  background: var(--accent);
  color: #fff;
  font-size: 28px;
  line-height: 34px;
  font-weight: 750;
  letter-spacing: -0.01em;
  transition: transform 0.15s ease;
}

.on-yellow .done {
  background: var(--black);
}

.done:active {
  transform: scale(0.96);
}

.done svg {
  flex: none;
}

.done .tick-fill {
  fill: none;
  transition: fill 0.2s ease;
}

.done[aria-pressed='true'] .tick-fill {
  fill: #fff;
}

.done[aria-pressed='true'] .tick-mark {
  stroke: var(--accent);
}

.on-yellow .done[aria-pressed='true'] .tick-mark {
  stroke: var(--black);
}

.done[aria-pressed='true'] {
  animation: pop 0.35s ease;
}

@keyframes pop {
  40% {
    transform: scale(1.06);
  }
}

.link-button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--body);
  font-size: 15px;
  line-height: 18px;
  text-decoration: underline 1px;
  text-underline-position: from-font;
}

.on-yellow .link-button {
  color: var(--black);
}

.note-form {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.note-form[hidden] {
  display: none;
}

.note-form textarea {
  min-height: 120px;
  resize: vertical;
}

.on-yellow .field,
.on-paper .field {
  background: none;
  border-color: var(--black);
  color: var(--black);
}

.on-yellow .field::placeholder,
.on-paper .field::placeholder {
  color: rgba(10, 10, 10, 0.6);
}

.on-yellow .pill,
.on-paper .pill {
  color: var(--black);
}

.on-yellow .pill:hover,
.on-paper .pill:hover {
  background: var(--black);
  color: var(--paper);
}

.note-status {
  font-size: 15px;
  line-height: 22px;
}

/* ---------- Stage 7 ---------- */

.prompt-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-top: 48px;
  border-top: 1px solid var(--line);
}

.prompt-block > p:not(.label) {
  font-size: 20px;
  line-height: 32px;
  color: var(--paper);
  max-width: 620px;
}

.prompt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 28px 32px;
  border-radius: 12px;
  background: var(--black);
}

.prompt p {
  font-family: var(--mono);
  font-size: 17px;
  line-height: 28px;
  color: var(--paper);
}

.press {
  display: flex;
  align-items: center;
  gap: 32px;
}

.big-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 88px;
  padding-inline: 44px;
  border: 0;
  border-radius: 44px;
  background: var(--accent);
  color: #fff;
  font-size: 26px;
  line-height: 32px;
  font-weight: 750;
  letter-spacing: -0.01em;
  transition: transform 0.15s ease;
}

.big-button:active {
  transform: scale(0.96);
}

.press .answer {
  max-width: 260px;
}

.jev {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding: 56px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.jev-tag {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 17px;
  line-height: 22px;
  font-weight: 500;
  color: var(--paper);
}

.jev-tag span {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding-inline: 14px;
  border: 1px solid var(--accent);
  border-radius: 16px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.jev h3 {
  font-size: clamp(32px, 3.3vw, 48px);
  line-height: 1.12;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.stat {
  font-size: clamp(72px, 8.3vw, 120px);
  line-height: 0.87;
  font-weight: 250;
  letter-spacing: -0.05em;
  color: var(--accent);
}

.stat + p {
  margin-top: -28px;
  font-size: 16px;
  line-height: 24px;
  color: var(--muted);
  max-width: 340px;
}

.jev > .stat ~ p ~ p {
  font-size: 19px;
  line-height: 31px;
  max-width: 600px;
}

.jev ul {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  line-height: 26px;
}

.jev li {
  padding-block: 14px;
  border-top: 1px solid var(--line);
}

.jev-figures {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

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

.jev-runs {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
}

.jev-runs > div {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-block: 20px;
  border-top: 1px solid var(--line);
}

.jev-runs .calls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  line-height: 22px;
}

.jev-runs code {
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  font-size: 13px;
  color: var(--paper);
}

.jev-runs code.on {
  border-color: var(--accent);
  color: var(--accent);
}

.jev-runs em {
  flex-basis: 100%;
  font-style: normal;
  color: var(--muted);
}

/* ---------- Agent link and close ---------- */

.panel.link-panel {
  min-height: 0;
  align-items: center;
  padding-block: 112px 128px;
}

.link-panel .panel-main {
  flex-direction: row;
  align-items: flex-end;
  gap: 64px;
}

.link-panel .copy {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.link-panel h2 {
  font-size: clamp(32px, 3.3vw, 48px);
  line-height: 1.12;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.link-panel p {
  font-size: 20px;
  line-height: 32px;
}

.panel.close {
  flex-direction: column;
  justify-content: space-between;
  gap: 160px;
  padding: 160px var(--gutter) 48px;
}

.close-top {
  display: flex;
  align-items: flex-end;
  gap: clamp(40px, 6.67vw, 96px);
}

.close-top .headline {
  flex: 1 1 0;
  font-size: clamp(56px, 9.4vw, 136px);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.close-side {
  flex: 0 0 clamp(300px, 29vw, 420px);
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.close-side > p {
  font-size: 22px;
  line-height: 36px;
}

.close-side .big-button {
  width: 100%;
  padding-inline: 36px;
}

.close-side .tried {
  font-size: 16px;
  line-height: 24px;
  font-weight: 500;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px 32px;
  padding-top: 32px;
  border-top: 1px solid var(--body);
  font-size: 15px;
  line-height: 18px;
}

.footer img {
  display: block;
  height: 36px;
  width: auto;
}

.footer .made {
  font-size: 17px;
  line-height: 22px;
  font-weight: 500;
}

.footer nav {
  display: flex;
  gap: 32px;
}

.footer nav a {
  text-decoration: none;
}

.footer nav a:hover {
  text-decoration: underline;
}

/* ---------- Sidebar hint ---------- */

/* The arrow's tip sits under Hatch's sidebar switch, 28px from the window's right edge in Fit to view. */
.hint {
  position: fixed;
  top: 6px;
  right: 16px;
  z-index: 55;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  animation: rise 0.5s ease 0.8s both;
}

.hint[hidden] {
  display: none;
}

.hint-arrow {
  display: block;
  animation: nudge 1.6s ease-in-out infinite;
}

.hint-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 330px;
  padding: 14px 12px 14px 20px;
  border-radius: 12px;
  background: var(--paper);
  color: var(--black);
}

.hint-card p {
  font-size: 15px;
  line-height: 22px;
  font-weight: 500;
}

.hint-close {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: none;
  color: var(--black);
}

.hint-close:hover {
  background: rgba(10, 10, 10, 0.1);
}

.hint-close:focus-visible {
  outline-color: var(--black);
}

@keyframes nudge {
  50% {
    transform: translateY(-5px);
  }
}

@media (max-width: 820px) {
  .hint {
    display: none;
  }
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: 60;
  padding: 18px 28px;
  border-radius: 32px;
  background: var(--paper);
  color: var(--black);
  font-size: 17px;
  line-height: 22px;
  font-weight: 600;
  white-space: nowrap;
  transform: translate(-50%, 120px);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1.2), opacity 0.2s ease;
  pointer-events: none;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* ---------- Narrow layouts ---------- */

@media (max-width: 1100px) {
  .row-text {
    flex-basis: 220px;
  }
  .try {
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
  }
  .done-wrap {
    align-items: flex-start;
  }
  .close-top,
  .link-panel .panel-main {
    flex-direction: column;
    align-items: flex-start;
  }
  .close-side {
    flex-basis: auto;
    max-width: 420px;
  }
}

@media (max-width: 820px) {
  body {
    font-size: 17px;
    line-height: 28px;
  }
  .panel {
    flex-direction: column;
    gap: 40px;
    padding: 72px var(--gutter) 120px;
    border-radius: 32px 32px 0 0;
  }
  .panel:first-child {
    padding-top: 56px;
  }
  .panel-side {
    flex: none;
    flex-direction: row;
    align-items: flex-end;
    gap: 24px;
  }
  .numeral {
    position: static;
    font-size: 120px;
  }
  .then {
    display: none;
  }
  .control {
    width: calc(50% - 10px);
  }
  .control.wide {
    width: 100%;
    max-width: none;
  }
  .replica {
    font-size: 18px;
    white-space: normal;
  }
  .panel-main {
    gap: 40px;
  }
  .lede {
    font-size: 19px;
    line-height: 31px;
  }
  .lede + .lede {
    margin-top: -20px;
  }
  .subhead {
    margin-top: -16px;
  }
  .aside {
    margin-top: -16px;
  }
  .row {
    flex-wrap: wrap;
    gap: 12px 20px;
    padding-block: 20px;
  }
  .row-text {
    flex: 1 1 60%;
  }
  .row-bar {
    flex: 1 1 100%;
    height: 14px;
  }
  .compare,
  .layers,
  .canvas-diagram {
    flex-direction: column;
    align-items: stretch;
  }
  .layers > .arrow,
  .canvas-diagram .arrow {
    transform: rotate(90deg);
    align-self: center;
  }
  .sample-card,
  .jev,
  .practice {
    padding: 28px;
  }
  .sample-card h3 {
    font-size: 26px;
    line-height: 32px;
  }
  .pin {
    top: 20px;
    right: 20px;
  }
  .try-text p,
  .esc p,
  .after p {
    font-size: 20px;
    line-height: 31px;
  }
  .prompt,
  .press {
    flex-direction: column;
    align-items: flex-start;
  }
  .done,
  .big-button {
    height: 72px;
    font-size: 23px;
  }
  .big-button {
    padding-inline: 28px;
    font-size: 20px;
    white-space: nowrap;
  }
  .keycap {
    height: 72px;
    font-size: 24px;
  }
  .table {
    font-size: 13px;
  }
  .table > div {
    flex-wrap: wrap;
    gap: 4px 16px;
  }
  .table span:first-child {
    flex: 1 1 100%;
  }
  .panel.close {
    gap: 96px;
    padding-top: 96px;
  }
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer nav {
    flex-wrap: wrap;
    gap: 12px 24px;
  }
  .progress {
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ---------- The Agent page ---------- */

.doc-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 32px;
  padding: 20px var(--gutter);
  border-bottom: 1px solid #333;
  font-size: 15px;
  line-height: 20px;
}

.doc-bar img {
  display: block;
  height: 28px;
  width: auto;
}

.doc-bar .path {
  font-family: var(--mono);
  color: var(--muted);
}

.doc-bar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-left: auto;
}

.doc-bar a {
  text-decoration: none;
  color: var(--body);
}

.doc-bar a:hover,
.doc-bar a[aria-current] {
  color: var(--paper);
}

.doc-bar a.plain {
  color: var(--accent);
}

.doc {
  display: flex;
  flex-direction: column;
  gap: 160px;
  padding: 140px var(--gutter) 160px;
}

.doc-title {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.doc h1 {
  font-size: clamp(44px, 6.1vw, 88px);
  line-height: 1.02;
  font-weight: 650;
  letter-spacing: -0.04em;
  color: var(--paper);
  max-width: 1000px;
}

.doc-title > p {
  font-size: 22px;
  line-height: 36px;
  max-width: 760px;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 24px;
}

.toc a {
  color: var(--accent);
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

.doc section {
  display: flex;
  gap: clamp(40px, 6.67vw, 96px);
  scroll-margin-top: 40px;
}

.doc-head {
  flex: 0 0 clamp(280px, 33.3vw, 480px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.anchor {
  font-family: var(--mono);
  font-size: 15px;
  line-height: 20px;
  color: var(--accent);
  text-decoration: none;
}

.doc h2 {
  font-size: clamp(32px, 3.3vw, 48px);
  line-height: 1.125;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.doc-body {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.doc code {
  font-family: var(--mono);
  font-size: 0.89em;
  color: var(--paper);
}

.doc pre {
  margin: 0;
  padding: 28px 32px;
  border-radius: 12px;
  background: var(--charcoal);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 28px;
  color: var(--paper);
  overflow-x: auto;
  overflow-wrap: normal;
}

.list > li,
.list > div {
  display: flex;
  gap: 32px;
  padding-block: 22px;
  border-top: 1px solid var(--line);
}

.list > :last-child {
  border-bottom: 1px solid var(--line);
}

.list .key {
  flex: 0 0 42%;
  color: var(--paper);
  font-weight: 550;
}

.list .key code {
  font-weight: 400;
}

.list .value {
  flex: 1 1 0;
  min-width: 0;
}

.steps {
  counter-reset: step;
}

.steps > li {
  counter-increment: step;
}

.steps > li::before {
  content: counter(step);
  flex: 0 0 24px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--accent);
}

.steps .key {
  flex-basis: 30%;
}

.group {
  display: flex;
  flex-direction: column;
  padding-bottom: 48px;
}

.group h3 {
  padding-bottom: 16px;
  font-size: 14px;
  line-height: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.group .list > li {
  padding-block: 14px;
}

.group .key {
  flex-basis: 34%;
}

.rules > li {
  padding-block: 22px;
  border-top: 1px solid var(--line);
  color: var(--paper);
}

.rules > li:last-child {
  border-bottom: 1px solid var(--line);
}

.doc-foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 32px;
  padding: 32px var(--gutter) 48px;
  border-top: 1px solid #333;
  font-size: 15px;
  line-height: 20px;
  color: var(--muted);
}

.doc-foot nav {
  display: flex;
  gap: 28px;
}

.doc-foot a {
  color: var(--body);
  text-decoration: none;
}

.doc-foot a:hover {
  color: var(--paper);
}

@media (max-width: 900px) {
  .doc {
    gap: 96px;
    padding-block: 72px 96px;
  }
  .doc section {
    flex-direction: column;
    gap: 32px;
  }
  .doc-head {
    flex: none;
  }
  .doc-title > p {
    font-size: 19px;
    line-height: 31px;
  }
  .doc-bar nav {
    margin-left: 0;
  }
  .list > li,
  .list > div {
    flex-direction: column;
    gap: 6px;
  }
  .steps > li {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px 16px;
  }
  .steps .key {
    flex: 1 1 calc(100% - 40px);
  }
  .steps .value {
    flex: 1 1 100%;
    padding-left: 40px;
  }
  .list:not(.steps) .key {
    flex: none;
  }
}