/* SPDX-License-Identifier: AGPL-3.0-only */

:root {
  /* Auto follows the OS, including when JavaScript is unavailable. */
  color-scheme: light dark;
  --paper: light-dark(#f5f5ef,#151c18);
  --ink: light-dark(#1e2b25,#e5ece2);
  --muted: light-dark(#59665e,#aab8ab);
  --line: light-dark(#d7ddd3,#39473c);
  --green: light-dark(#42694c,#a0c498);
  --soft-green: light-dark(#e8ede3,#253329);
  --key-light: #ffffff;
  --key-glow: rgba(255,255,255,.3);
  font-family: Arial,Helvetica,sans-serif;
  font-synthesis: none;
  scroll-behavior: smooth;
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

/* The same native selector also works when scripts are disabled or blocked.
   A saved JavaScript preference takes priority before the page is parsed. */
:root:not([data-theme]):has(#theme-select option[value="light"]:checked) {
  color-scheme: light;
}

:root:not([data-theme]):has(#theme-select option[value="dark"]:checked) {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button,select {
  font: inherit;
}

button,a {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: default;
}

button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible {
  outline: 3px solid light-dark(#4b7fce,#8db7ff);
  outline-offset: 5px;
}

button[hidden],[hidden] {
  display: none!important;
}

/* Native popovers work without scripts and stay out of the page layout. */
.native-popover {
  display: none;
  width: min(360px,calc(100% - 40px));
  max-height: calc(100% - 40px);
  overflow: auto;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 12px 48px #0003;
}

.native-popover:popover-open {
  display: block;
}

.native-popover p {
  margin: 16px 0;
  font-size: .88rem;
  color: var(--muted);
}

.native-popover fieldset {
  margin: 0 0 20px;
  padding: 0;
  border: 0;
}

.native-popover legend {
  margin-bottom: 12px;
  padding: 0;
  font-weight: 600;
}

.color-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}

.color-options label {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  cursor: pointer;
}

.color-options input {
  accent-color: var(--green);
}

p {
  margin: 0;
  line-height: 1.65;
}

h1,h2,h3 {
  margin: 0;
  font-weight: 600;
}

h1,h2 {
  text-wrap: balance;
}

h3 {
  font-size: 1.13rem;
  letter-spacing: -.025em;
}

code,kbd {
  font-family: ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;
}

code {
  font-size: .85em;
}

kbd {
  font-size: .78em;
  padding: .16em .35em;
  border: 1px solid currentColor;
  border-radius: 4px;
  box-shadow: 0 1px 0 currentColor;
}

.shell {
  width: min(1200px,calc(100% - 96px));
  margin-inline: auto;
}

.section-space {
  padding-block: 104px;
}

.eyebrow {
  font-size: .73rem;
  letter-spacing: .115em;
  text-transform: uppercase;
  font-weight: 600;
  line-height: 1.5;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: light-dark(#507457,#a0c498);
  flex: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  transform: translateY(-200%);
  padding: 12px 18px;
  background: var(--ink);
  color: light-dark(#fff,#151c18);
  z-index: 20;
  border-radius: 8px;
}

.skip-link:focus {
  transform: none;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  min-height: 96px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.03em;
}

.wordmark-light {
  font-weight: 400;
  color: var(--muted);
}

.brand-icon {
  display: flex;
  align-items: center;
  gap: 3px;
  transform: rotate(-9deg);
}

.brand-icon span {
  width: 9px;
  height: 18px;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  box-shadow: 0 2px 0 light-dark(#b7c1b5,#536650);
}

.brand-icon span:nth-child(2) {
  height: 23px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: .82rem;
  margin-left: auto;
}

.site-header nav a {
  padding-block: 10px;
}

.site-header nav a:hover,.text-link:hover,.site-footer a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.nav-source {
  display: flex;
  gap: 14px;
}

.theme-control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .75rem;
  color: var(--muted);
}

.theme-control select {
  min-height: 36px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1.07fr;
  gap: 50px;
  align-items: center;
  padding-top: 94px;
  padding-bottom: 84px;
}

.hero-copy .eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--green);
  margin-bottom: 24px;
}

h1 {
  font-size: clamp(3.7rem,6.1vw,5.4rem);
  letter-spacing: -.065em;
  line-height: 1.04;
}

.hero-description {
  max-width: 430px;
  font-size: 1.08rem;
  color: var(--muted);
  margin-top: 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 15px 21px;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: .86rem;
  font-weight: 600;
  line-height: 1.4;
  transition: background .15s,transform .15s;
}

.button:hover {
  transform: translateY(-2px);
}

.button-dark {
  background: var(--ink);
  border-color: var(--ink);
  color: light-dark(#fff,#151c18);
}

.button-dark:hover {
  background: light-dark(#354d3c,#c4d8bc);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: .84rem;
  font-weight: 600;
}

.hero-note {
  font-size: .75rem;
  color: var(--muted);
  margin-top: 22px;
}

.preview {
  border: 1px solid light-dark(#dce1d7,#394b3d);
  border-radius: 20px;
  min-width: 0;
  background: radial-gradient(ellipse at 50% 43%,light-dark(#fff,#2b392e) 0,light-dark(#e9eee5,#1d2921) 72%);
  padding: 25px 25px 18px;
  overflow: hidden;
}

/* Radio state supplies the preview when JavaScript is unavailable. */
.preview:has([name="preview-color"][value="blue"]:checked) {
  --key-light: #9bbfff;
  --key-glow: rgba(87,142,255,.55);
}

.preview:has([name="preview-color"][value="red"]:checked) {
  --key-light: #ffaaa0;
  --key-glow: rgba(255,110,90,.5);
}

.preview:has([name="preview-color"][value="green"]:checked) {
  --key-light: #a4f9b2;
  --key-glow: rgba(100,245,137,.4);
}

.preview:has([name="preview-color"][value="cyan"]:checked) {
  --key-light: #a1f4f6;
  --key-glow: rgba(95,228,240,.5);
}

.preview:has([name="preview-color"][value="yellow"]:checked) {
  --key-light: #fff2a6;
  --key-glow: rgba(245,220,87,.5);
}

.preview:has([name="preview-color"][value="pink"]:checked) {
  --key-light: #f6b3fa;
  --key-glow: rgba(235,125,245,.5);
}

.preview-color-option:not([data-color="white"]),
.preview:has([name="preview-color"]:not([value="white"]):checked) #preview-color {
  display: none;
}

.preview:has([name="preview-color"][value="blue"]:checked) [data-color="blue"],
.preview:has([name="preview-color"][value="red"]:checked) [data-color="red"],
.preview:has([name="preview-color"][value="green"]:checked) [data-color="green"],
.preview:has([name="preview-color"][value="cyan"]:checked) [data-color="cyan"],
.preview:has([name="preview-color"][value="yellow"]:checked) [data-color="yellow"],
.preview:has([name="preview-color"][value="pink"]:checked) [data-color="pink"] {
  display: inline;
}

.preview-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.preview-label {
  font-family: ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size: .64rem;
  letter-spacing: .13em;
  color: light-dark(#59694f,#b1c1a7);
}

.preview-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .72rem;
  color: light-dark(#4c5e49,#c2d1ba);
  background: light-dark(#ffffff8c,#151c188c);
  border: 1px solid light-dark(#d9e0d4,#4b5c43);
  border-radius: 20px;
  padding: 6px 10px;
  min-width: 73px;
}

.preview-dot {
  width: 8px;
  height: 8px;
  background: var(--key-light);
  border-radius: 50%;
  border: 1px solid light-dark(#a6b3a0,#6e8365);
}

.keyboard-wrap {
  padding: 48px 0 42px;
  perspective: 800px;
}

.keyboard {
  background: linear-gradient(165deg,#394640,#26322c);
  border: 1px solid #56665a;
  border-radius: 11px;
  padding: 12px 11px 13px;
  transform: rotateX(17deg) rotateZ(-5deg);
  box-shadow: 0 4px 0 #273b2d,0 9px 0 light-dark(#afbaa9,#111b13),0 24px 24px -10px light-dark(#b1bca9,#0b110d);
  user-select: none;
  min-width: 0;
}

.keyboard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1px 3px 10px;
}

.keyboard-brand {
  color: #d1d9cd;
  font-size: .48rem;
  letter-spacing: .22em;
}

.keyboard-lights {
  color: var(--key-light);
  font-size: .32rem;
  letter-spacing: .13em;
}

.key-row {
  display: flex;
  gap: 3px;
  margin-bottom: 4px;
  height: 25px;
}

.key-row:last-child {
  margin-bottom: 0;
}

.key-row span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  flex: 1;
  background: linear-gradient(150deg,#546158,#3d4c42);
  border: 1px solid #738071;
  border-radius: 4px;
  font-size: clamp(.45rem,.7vw,.57rem);
  font-weight: 500;
  color: var(--key-light);
  text-shadow: 0 0 5px var(--key-glow);
  box-shadow: 0 1px 0 #1b2a20,0 0 5px var(--key-glow);
  transition: color .2s,box-shadow .2s;
}

.key-row-small {
  height: 17px;
  margin-bottom: 8px;
}

.key-row-small span {
  font-size: .38rem;
  background: #3d4a41;
}

.key-row .key-wide {
  flex: 1.5;
}

.key-row .key-enter {
  flex: 2;
}

.key-row .key-shift {
  flex: 2.35;
}

.key-row .key-space {
  flex: 6.1;
}

.key-row .key-mod {
  flex: 1.3;
}

.key-row .fn-key,.key-row .number-two {
  border-color: #b6c4ad;
}

.preview-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px solid light-dark(#ccd6c5,#41513a);
  padding-top: 22px;
}

.preview-controls p {
  font-size: .88rem;
  line-height: 1.6;
  color: light-dark(#5c6e55,#b1c1a7);
}

.preview-controls strong {
  color: light-dark(#30452e,#d3e1cc);
  font-weight: 500;
}

.preview-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 11px;
}

.button-small {
  padding: 9px 13px;
  font-size: .73rem;
  gap: 5px;
  background: light-dark(#f6f9f1,#31422e);
  border-color: light-dark(#c9d4c0,#586e4c);
  color: light-dark(#3c5333,#d7e5ce);
  box-shadow: 0 2px 0 light-dark(#cad4c3,#162011);
  white-space: nowrap;
}

.button-small kbd {
  font-size: .75rem;
  border-color: light-dark(#a9b79f,#7a906c);
}

.preview-reset {
  border: 0;
  background: transparent;
  font-size: .64rem;
  padding: 4px;
  color: light-dark(#4d6443,#b4caaa);
}

.preview-reset:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.preview-caption {
  color: light-dark(#5c6a55,#a6b79d);
  text-align: center;
  font-size: .58rem;
  line-height: 1.5;
  margin-top: 22px;
}

.facts-strip {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 12px;
  border-block: 1px solid var(--line);
  padding-block: 25px;
  color: light-dark(#576553,#b0beaa);
  font-size: .79rem;
}

.facts-strip>span {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.facts-strip>span:not(:last-child) {
  border-right: 1px solid var(--line);
}

.fact-icon {
  font-size: 1.15rem;
  color: light-dark(#71856a,#9ab08e);
}

.section-heading {
  max-width: 570px;
}

.section-heading .eyebrow {
  color: var(--green);
  margin-bottom: 18px;
}

h2 {
  font-size: clamp(2.15rem,3.4vw,3.2rem);
  letter-spacing: -.05em;
  line-height: 1.13;
}

.section-heading>p:not(.eyebrow) {
  font-size: .97rem;
  color: var(--muted);
  margin-top: 22px;
  max-width: 490px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 50px;
  margin-top: 52px;
}

.step {
  border-top: 1px solid var(--line);
  padding-top: 23px;
}

.step-number {
  display: block;
  font-family: ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size: .72rem;
  color: light-dark(#617158,#acbda2);
  margin-bottom: 25px;
}

.step h3 {
  margin-bottom: 12px;
}

.step p {
  color: var(--muted);
  font-size: .88rem;
  max-width: 320px;
}

.timing-note {
  margin-top: 46px;
  padding: 21px 23px;
  border: 1px solid light-dark(#d6ddcf,#3a4b31);
  border-radius: 9px;
  background: light-dark(#eff2e9,#202d22);
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.timing-note p {
  font-size: .81rem;
  color: light-dark(#586950,#b1c0a9);
  line-height: 1.7;
}

.timing-note strong {
  font-weight: 600;
  color: light-dark(#364a30,#d0dfc7);
}

.note-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid light-dark(#92a287,#758b68);
  border-radius: 50%;
  width: 18px;
  height: 18px;
  font-size: .72rem;
  flex: none;
  margin-top: 2px;
}

.compatibility-section {
  background: light-dark(#e9eee5,#1b261e);
  border-block: 1px solid light-dark(#d8e0d3,#37492f);
  padding-block: 84px;
}

.compatibility-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 95px;
}

.compatibility-layout .section-heading>p:not(.eyebrow) {
  max-width: 395px;
}

.compatibility-layout .text-link {
  margin-top: 27px;
}

.compatibility-card {
  background: light-dark(#f9faf5,#243026);
  border: 1px solid light-dark(#d2dcca,#425539);
  border-radius: 12px;
  padding: 28px;
}

.card-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}

.card-heading h3 {
  font-size: .94rem;
  letter-spacing: -.02em;
}

.specs {
  margin: 11px 0 23px;
}

.specs>div {
  display: grid;
  grid-template-columns: .8fr 1.3fr;
  gap: 15px;
  padding-block: 11px;
  font-size: .81rem;
}

.specs dt {
  color: light-dark(#64735c,#adbea2);
}

.specs dd {
  margin: 0;
}

.specs code {
  font-size: .93em;
}

.tested-result {
  background: light-dark(#e9f0e2,#2b3b27);
  border: 1px solid light-dark(#d4e0ca,#4b633e);
  border-radius: 6px;
  padding: 15px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: light-dark(#406035,#b9d6a8);
}

.tested-result>span {
  border: 1px solid light-dark(#8eaa7e,#789b65);
  border-radius: 50%;
  width: 19px;
  height: 19px;
  font-size: .75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  flex: none;
}

.tested-result p {
  font-size: .79rem;
  line-height: 1.65;
}

.tested-result strong {
  font-weight: 600;
}

.compatibility-limit {
  font-size: .71rem;
  color: light-dark(#6a7563,#adbea2);
  margin-top: 18px;
  line-height: 1.65;
}

.install-section .section-heading {
  max-width: 650px;
}

.install-section .section-heading>p:not(.eyebrow) {
  max-width: 550px;
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(0,1.8fr) minmax(220px,.8fr);
  gap: 50px;
  align-items: start;
  margin-top: 36px;
}

.install-layout>* {
  min-width: 0;
}

.code-card {
  color-scheme: dark;
  background: #1e2b25;
  border: 1px solid #1e2b25;
  border-radius: 10px;
  overflow: hidden;
  color: #e7eee3;
}

.code-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid #3b4940;
  padding: 14px 19px;
  min-height: 51px;
  font-size: .7rem;
  color: #aebbab;
}

.terminal-mark {
  display: inline-block;
  margin-right: 8px;
  font-family: ui-monospace,Consolas,monospace;
  color: #e7eee3;
}

.copy-button {
  flex: none;
  font-size: .67rem;
  letter-spacing: .01em;
  padding: 6px 8px;
  background: none;
  border: 1px solid #637561;
  border-radius: 4px;
  color: inherit;
  min-height: 28px;
  transition: background .15s;
}

.copy-button:hover {
  background: #ffffff18;
}

.code-card pre {
  margin: 0;
  padding: 24px 22px 28px;
  overflow: auto;
  line-height: 2.1;
  scrollbar-color: #70826c #1e2b25;
}

.code-card code {
  font-size: .73rem;
}

.code-card code,.inline-command code {
  -webkit-user-select: all;
  user-select: all;
}

.install-note {
  font-size: .74rem;
  color: var(--muted);
  margin-top: 14px;
  line-height: 1.75;
}

.install-links {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}

.install-links>span {
  font-size: .72rem;
  color: var(--muted);
}

.install-links code {
  font-size: .95em;
}

.install-aside {
  padding-top: 4px;
}

.install-aside h3 {
  margin-bottom: 15px;
}

.install-aside p {
  font-size: .83rem;
  color: var(--muted);
}

.inline-command {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 15px;
  background: light-dark(#e8ede2,#253329);
  border: 1px solid light-dark(#d2dbcb,#43563a);
  border-radius: 6px;
  margin: 17px 0;
}

.inline-command code {
  font-size: .76rem;
  overflow-wrap: anywhere;
}

.inline-command .copy-button {
  border-color: light-dark(#a9b9a0,#69815b);
  color: light-dark(#3d5632,#c1d8b3);
}

.inline-command .copy-button:hover {
  background: light-dark(#dae4d2,#354c2a);
}

.install-aside .small-note {
  font-size: .73rem;
  margin-top: 18px;
  color: light-dark(#65735d,#adbea2);
}

.undo-section {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 31px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 55px;
  align-items: center;
}

.undo-section h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.undo-section p {
  font-size: .8rem;
  color: var(--muted);
  max-width: 370px;
}

.light-command {
  background: transparent;
  margin: 0;
}

.light-command code {
  font-size: .73rem;
}

.open-section {
  border-block: 1px solid var(--line);
  padding-block: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 35px;
}

.open-section>div {
  max-width: 630px;
}

.open-section .eyebrow {
  color: var(--green);
  margin-bottom: 13px;
}

.open-section h2 {
  font-size: 2rem;
  letter-spacing: -.04em;
}

.open-section p:not(.eyebrow) {
  font-size: .86rem;
  color: var(--muted);
  margin-top: 16px;
  max-width: 570px;
}

.open-section .button {
  flex: none;
}

.site-footer {
  padding-block: 34px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  font-size: .7rem;
  color: light-dark(#5d6c55,#adbea2);
}

.site-footer>div {
  display: flex;
  gap: 26px;
}

.footer-divider {
  padding-inline: 10px;
  color: light-dark(#acb7a4,#728466);
}

@media(min-width:1500px) {
  .hero {
    padding-top: 118px;
    padding-bottom: 104px;
  }
  .key-row {
    height: 28px;
  }
  .key-row-small {
    height: 19px;
  }
  .keyboard-wrap {
    padding-block: 59px;
  }
}

@media(max-width:1050px) {
  .shell {
    width: calc(100% - 64px);
  }
  .hero {
    gap: 30px;
    padding-top: 70px;
    padding-bottom: 65px;
  }
  h1 {
    font-size: 4rem;
  }
  .hero-description {
    font-size: .95rem;
  }
  .preview {
    padding: 20px 18px 16px;
  }
  .keyboard-wrap {
    padding: 42px 0 35px;
  }
  .key-row {
    height: 21px;
    gap: 2px;
  }
  .key-row-small {
    height: 15px;
  }
  .key-row span {
    font-size: .43rem;
    border-radius: 3px;
  }
  .key-row-small span {
    font-size: .3rem;
  }
  .keyboard {
    padding: 10px 8px 11px;
  }
  .preview-controls {
    gap: 9px;
  }
  .preview-controls p {
    font-size: .76rem;
  }
  .button-small {
    padding: 8px 9px;
    font-size: .68rem;
  }
  .button-small kbd {
    font-size: .65rem;
  }
  .preview-caption {
    font-size: .54rem;
  }
  .facts-strip {
    font-size: .7rem;
  }
  .facts-strip>span {
    gap: 7px;
  }
  .compatibility-layout {
    gap: 50px;
  }
  .install-layout {
    gap: 30px;
  }
  .steps {
    gap: 35px;
  }
  .section-space {
    padding-block: 80px;
  }
  .open-section>div {
    max-width: 570px;
  }
  .open-section .button {
    font-size: .75rem;
  }
}

@media(max-width:800px) {
  .site-header {
    column-gap: 16px;
    row-gap: 12px;
    padding-block: 20px;
  }
  .site-header nav {
    order: 1;
    width: 100%;
    justify-content: flex-end;
  }
  .theme-control {
    margin-left: auto;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 55px;
  }
  .hero-copy {
    max-width: 550px;
  }
  h1 {
    font-size: clamp(3.7rem,10vw,5.4rem);
  }
  .hero-description {
    font-size: 1rem;
    max-width: 460px;
  }
  .preview {
    width: 100%;
    max-width: 570px;
    justify-self: center;
    padding: 23px 26px 19px;
  }
  .keyboard-wrap {
    padding: 50px 2px 45px;
  }
  .key-row {
    height: 27px;
    gap: 3px;
  }
  .key-row-small {
    height: 18px;
  }
  .key-row span {
    font-size: .57rem;
  }
  .key-row-small span {
    font-size: .38rem;
  }
  .preview-controls p {
    font-size: .88rem;
  }
  .button-small {
    padding: 9px 13px;
    font-size: .73rem;
  }
  .button-small kbd {
    font-size: .75rem;
  }
  .preview-caption {
    font-size: .6rem;
  }
  .facts-strip {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    padding-block: 24px;
    font-size: .77rem;
  }
  .facts-strip>span:nth-child(2) {
    border-right: 0;
  }
  .compatibility-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .compatibility-layout .section-heading>p:not(.eyebrow) {
    max-width: 500px;
  }
  .compatibility-card {
    max-width: 570px;
    width: 100%;
  }
  .steps {
    gap: 25px;
  }
  .step p {
    font-size: .83rem;
  }
  .step h3 {
    font-size: 1rem;
  }
  .install-layout {
    grid-template-columns: minmax(0,1fr);
    gap: 33px;
  }
  .install-aside {
    max-width: 480px;
  }
  .inline-command {
    max-width: 100%;
  }
  .undo-section {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .undo-section p {
    max-width: 500px;
  }
  .open-section {
    align-items: flex-start;
    flex-direction: column;
    gap: 25px;
  }
  .open-section h2 {
    font-size: 1.8rem;
  }
}

@media(max-width:540px) {
  .shell {
    width: calc(100% - 40px);
  }
  .site-header {
    min-height: 78px;
    gap: 12px;
  }
  .wordmark {
    font-size: .86rem;
    gap: 8px;
  }
  .brand-icon span {
    width: 7px;
    height: 15px;
  }
  .brand-icon span:nth-child(2) {
    height: 19px;
  }
  .site-header nav {
    width: auto;
    gap: 15px;
    font-size: .75rem;
  }
  .site-header nav a:not(.nav-source) {
    display: none;
  }
  .hero {
    padding-top: 45px;
    padding-bottom: 42px;
    gap: 40px;
  }
  .hero-copy .eyebrow {
    font-size: .65rem;
    letter-spacing: .1em;
    margin-bottom: 20px;
  }
  h1 {
    font-size: 3.55rem;
    line-height: 1.06;
  }
  .hero-description {
    font-size: .94rem;
    margin-top: 24px;
  }
  .hero-actions {
    gap: 23px;
    margin-top: 27px;
  }
  .button {
    padding: 14px 18px;
    font-size: .8rem;
  }
  .text-link {
    font-size: .78rem;
  }
  .hero-note {
    font-size: .67rem;
    margin-top: 19px;
  }
  .preview {
    border-radius: 13px;
    padding: 18px 15px 14px;
  }
  .preview-label {
    font-size: .56rem;
  }
  .preview-state {
    font-size: .64rem;
    padding: 5px 8px;
  }
  .keyboard-wrap {
    padding: 37px 0 35px;
  }
  .keyboard {
    padding: 8px 6px 9px;
    border-radius: 8px;
  }
  .keyboard-top {
    padding-bottom: 7px;
  }
  .keyboard-brand {
    font-size: .36rem;
  }
  .key-row {
    height: 20px;
    gap: 2px;
    margin-bottom: 3px;
  }
  .key-row-small {
    height: 13px;
    margin-bottom: 6px;
  }
  .key-row span {
    font-size: .39rem;
    border-radius: 3px;
  }
  .key-row-small span {
    font-size: .29rem;
  }
  .preview-controls {
    padding-top: 17px;
  }
  .preview-controls p {
    font-size: .77rem;
  }
  .button-small {
    padding: 8px 9px;
    font-size: .67rem;
    gap: 4px;
  }
  .button-small kbd {
    font-size: .64rem;
  }
  .preview-reset {
    font-size: .6rem;
  }
  .preview-caption {
    font-size: .54rem;
    margin-top: 18px;
  }
  .facts-strip {
    font-size: .66rem;
    gap: 19px 4px;
    padding-block: 22px;
  }
  .facts-strip>span {
    gap: 6px;
  }
  .fact-icon {
    font-size: .96rem;
  }
  .section-space {
    padding-block: 62px;
  }
  .section-heading .eyebrow {
    font-size: .64rem;
    letter-spacing: .1em;
    margin-bottom: 15px;
  }
  h2 {
    font-size: 2.15rem;
  }
  .section-heading>p:not(.eyebrow) {
    font-size: .89rem;
    margin-top: 19px;
  }
  .steps {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 33px;
  }
  .step {
    display: grid;
    grid-template-columns: 36px 1fr;
    column-gap: 12px;
    padding-top: 22px;
  }
  .step-number {
    grid-row: 1/3;
    margin: 3px 0 0;
  }
  .step h3 {
    font-size: 1.08rem;
    margin-bottom: 8px;
  }
  .step p {
    max-width: 100%;
    font-size: .85rem;
  }
  .timing-note {
    margin-top: 31px;
    padding: 18px 15px;
    gap: 10px;
  }
  .timing-note p {
    font-size: .75rem;
  }
  .compatibility-section {
    padding-block: 58px;
  }
  .compatibility-layout {
    gap: 30px;
  }
  .compatibility-card {
    padding: 21px;
  }
  .specs>div {
    font-size: .76rem;
    grid-template-columns: .8fr 1.2fr;
    gap: 10px;
    padding-block: 10px;
  }
  .card-heading h3 {
    font-size: .89rem;
  }
  .tested-result {
    padding: 13px;
  }
  .tested-result p {
    font-size: .73rem;
  }
  .compatibility-limit {
    font-size: .67rem;
  }
  .install-layout {
    margin-top: 28px;
  }
  .code-card pre {
    padding: 21px 16px;
  }
  .code-card code {
    font-size: .67rem;
  }
  .code-toolbar {
    padding: 12px 15px;
  }
  .install-note {
    font-size: .71rem;
  }
  .install-links .text-link {
    font-size: .77rem;
  }
  .install-aside h3 {
    font-size: 1.08rem;
  }
  .undo-section {
    margin-top: 35px;
    padding-top: 27px;
  }
  .light-command {
    padding: 12px;
  }
  .light-command code {
    font-size: .63rem;
  }
  .light-command .copy-button {
    font-size: .61rem;
  }
  .open-section {
    padding-block: 39px;
  }
  .open-section .eyebrow {
    font-size: .64rem;
  }
  .open-section h2 {
    font-size: 1.8rem;
  }
  .open-section p:not(.eyebrow) {
    font-size: .82rem;
  }
  .site-footer {
    padding-block: 28px;
    flex-direction: column;
    gap: 18px;
    font-size: .68rem;
  }
  .site-footer>div {
    gap: 22px;
  }
}

@media(prefers-reduced-motion:reduce) {
  :root {
    scroll-behavior: auto;
  }
  *,*::before,*::after {
    transition: none!important;
    animation: none!important;
  }
  .button:hover {
    transform: none;
  }
}