/*
 * The landing page, in the app's own palette (apps/web/src/index.css): orange on near-white in the
 * light theme, indigo on slate in the dark one, following the system. Where the app's colours are
 * too light for text on this page, a deeper shade of the same hue is used, so every pair meets
 * WCAG AA: links and the primary button's label are all 4.5:1 or better.
 */

:root {
  color-scheme: light dark;
  --bg: oklch(96% 0.001 286.375);
  --surface: oklch(98% 0 0);
  --sunken: oklch(92% 0.004 286.32);
  --line: oklch(86% 0.006 286);
  --text: oklch(21% 0.006 285.885);
  --muted: oklch(45% 0.012 286);
  --link: oklch(50% 0.16 45);
  --brand: oklch(60% 0.19 46);
  --fill: oklch(70% 0.213 47.604);
  --on-fill: oklch(21% 0.006 285.885);
  --yes: oklch(55% 0.12 182);
  --partial: oklch(62% 0.16 70);
  --claimed: oklch(55% 0.18 300);
  --none: oklch(60% 0.01 286);
  --ours: oklch(95.5% 0.035 75);
  --radius: 0.75rem;
  --sans: ui-sans-serif, system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: oklch(25.26% 0.014 253.1);
    --surface: oklch(30.33% 0.016 252.42);
    --sunken: oklch(20.15% 0.012 254.09);
    --line: oklch(38% 0.02 255);
    --text: oklch(97.807% 0.029 256.847);
    --muted: oklch(80% 0.02 256);
    --link: oklch(80% 0.12 280);
    --brand: oklch(70% 0.17 278);
    --fill: oklch(52% 0.23 277);
    --on-fill: oklch(96% 0.018 272.314);
    --yes: oklch(72% 0.12 184);
    --partial: oklch(78% 0.14 75);
    --claimed: oklch(75% 0.15 300);
    --none: oklch(62% 0.02 256);
    --ours: color-mix(in oklch, var(--fill) 16%, var(--surface));
  }
}

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

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

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 3px;
  border-radius: 0.25rem;
}

code,
.key {
  font-family: var(--mono);
  font-size: 0.9em;
}

h1,
h2,
h3 {
  line-height: 1.2;
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.25rem);
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem;
}

p {
  margin: 0 0 1rem;
}

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 48rem) {
  .wrap {
    padding-inline: 1.5rem;
  }
}

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border-radius: 0.5rem;
}

.skip:focus {
  top: 0.75rem;
}

/* Header: the wordmark and the way into the app, with the page's sections under it on a phone. */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1rem;
  padding-block: 0.6rem;
}

.wordmark {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
  margin: 0;
}

.wordmark span {
  color: var(--brand);
}

.site-header nav {
  order: 3;
  flex-basis: 100%;
  min-width: 0;
}

.site-header nav ul {
  display: flex;
  gap: 0.25rem 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
}

.site-header nav a {
  display: inline-block;
  padding-block: 0.35rem;
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
}

.site-header nav a:hover {
  color: var(--text);
}

.site-header .button {
  margin-left: auto;
}

@media (min-width: 56rem) {
  .site-header nav {
    order: 0;
    flex-basis: auto;
    margin-left: auto;
  }
  .site-header .button {
    margin-left: 0.5rem;
  }
}

/* Buttons. */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.55rem 1.1rem;
  border: 1.5px solid var(--line);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  border-color: var(--muted);
}

.button.primary {
  background: var(--fill);
  border-color: var(--fill);
  color: var(--on-fill);
}

.button.primary:hover {
  background: color-mix(in oklch, var(--fill) 88%, var(--text));
}

.button.small {
  min-height: 2.25rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.95rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Sections. */

main > section {
  padding-block: 3.5rem;
  scroll-margin-top: 4.5rem;
}

main > section + section {
  border-top: 1px solid var(--line);
}

@media (min-width: 48rem) {
  main > section {
    padding-block: 5rem;
  }
}

.section-lede,
.prose {
  max-width: 46rem;
}

.section-lede {
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.note {
  max-width: 46rem;
  color: var(--muted);
  margin-top: 1.5rem;
}

/* Hero. */

.hero {
  padding-top: 3rem;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--link);
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 1.4rem + 3.6vw, 3.75rem);
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 18ch;
}

.lede {
  font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  max-width: 44rem;
  margin-bottom: 1.5rem;
}

.proof {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 1rem 0 2.5rem;
}

/* Screenshots: drawn by the app itself, framed as a card. */

.shot {
  margin: 0;
}

.shot picture,
.shot > a {
  display: block;
}

.shot img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.shot figcaption {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.6rem;
}

.hero-shot img {
  box-shadow: 0 1.5rem 3rem -1.5rem color-mix(in oklch, var(--text) 35%, transparent);
}

/* The board and its numbers: side by side at a desk, in proportion to their widths. */
.hero-shot .hero-pair {
  display: grid;
  gap: 1rem;
  align-items: start;
}

@media (min-width: 56rem) {
  .hero-shot .hero-pair {
    grid-template-columns: 640fr 532fr;
  }
}

/* The filmstrip: one press per frame, two to a row at a desk, swiped through on a phone. */

.film-title {
  margin-top: 2.5rem;
}

.film {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 85%;
  gap: 1rem;
  margin: 1rem 0 0;
  padding: 0 0 0.75rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  counter-reset: press;
}

.film > li {
  scroll-snap-align: start;
  counter-increment: press;
}

.film figcaption::before {
  content: counter(press) ". ";
  font-weight: 700;
  color: var(--text);
}

@media (min-width: 48rem) {
  .film {
    grid-auto-flow: row;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
  }
}

.after-film {
  max-width: 46rem;
  margin-top: 1.25rem;
}

/* Keycaps: how the page writes a key or a ZMK behavior. */

.key {
  display: inline-block;
  padding: 0.1em 0.5em;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 0.4rem;
  background: var(--surface);
  color: var(--text);
  line-height: 1.5;
  white-space: nowrap;
}

.behaviors {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.behaviors > li {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.behaviors .keys {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}

.behaviors p:last-child {
  margin: 0;
  color: var(--muted);
}

/*
 * Features: the words, then the app's own screenshot at the full width of the page, where its text
 * stays readable. The phone shot is narrow, so it sits beside its words at a desk.
 */

.features {
  display: grid;
  gap: 3.5rem;
}

.feature {
  display: grid;
  gap: 1.25rem;
}

.feature-text {
  max-width: 46rem;
}

.feature-text p {
  color: var(--muted);
  margin-bottom: 0;
}

.phone-shot {
  max-width: 20rem;
  justify-self: center;
}

@media (min-width: 48rem) {
  .phone-feature {
    grid-template-columns: minmax(0, 1fr) 20rem;
    align-items: center;
    gap: 2.5rem;
  }
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
  margin: 3.5rem 0 0;
  padding: 0;
  list-style: none;
}

.cards > li,
.trust > li,
.steps > li {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.cards p,
.trust p,
.steps p {
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.cards p:last-child,
.trust p:last-child,
.steps p:last-child {
  margin-bottom: 0;
}

.layouts-title {
  margin-top: 3rem;
}

.layouts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.layouts a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  min-height: 2.25rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}

.layouts a:hover {
  border-color: var(--muted);
}

.layouts span {
  color: var(--muted);
  font-size: 0.85rem;
}

.layouts-more {
  margin: 1rem 0 0;
  color: var(--muted);
}

/* Trust. */

.trust {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.evidence {
  font-size: 0.9rem;
}

.evidence code {
  overflow-wrap: anywhere;
}

.assumptions {
  margin-top: 2rem;
  padding: 1.25rem 1.4rem;
  border: 1px dashed var(--muted);
  border-radius: var(--radius);
  background: var(--sunken);
}

.assumptions ul {
  margin: 0;
  padding-left: 1.2rem;
}

.assumptions li + li {
  margin-top: 0.4rem;
}

/* The comparison: a table that scrolls on its own on a phone, the page never does. */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.compare {
  width: 100%;
  min-width: 60rem;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.compare caption {
  padding: 0.9rem 1rem 0.5rem;
  text-align: left;
  font-weight: 700;
}

.compare th,
.compare td {
  padding: 0.6rem 0.75rem;
  border-top: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare thead th {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
}

.compare tbody th {
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 13rem;
  background: var(--surface);
  font-weight: 600;
}

.compare .lb {
  background: var(--ours);
}

/* On a phone the feature names take less room, so two columns of answers show beside them. */
@media (max-width: 47.99rem) {
  .compare {
    font-size: 0.875rem;
  }
  .compare tbody th {
    min-width: 8.5rem;
  }
}

.compare thead .lb {
  color: var(--text);
}

.yes,
.partial,
.claimed,
.no,
.nf {
  font-weight: 600;
  white-space: nowrap;
}

.yes::before,
.partial::before,
.claimed::before,
.no::before,
.nf::before {
  display: inline-block;
  width: 1.1em;
  font-weight: 700;
}

.yes::before {
  content: "✓";
  color: var(--yes);
}

.partial::before {
  content: "◐";
  color: var(--partial);
}

.claimed::before {
  content: "?";
  color: var(--claimed);
}

.no::before,
.nf::before {
  content: "–";
  color: var(--none);
}

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

sup {
  line-height: 0;
  margin-left: 0.15em;
}

sup a {
  display: inline-block;
  min-width: 1.1em;
  text-align: center;
}

.notes {
  margin: 1.25rem 0 3rem;
  padding-left: 1.4rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.notes li + li {
  margin-top: 0.4rem;
}

.notes li:target {
  color: var(--text);
}

.grid-2 {
  display: grid;
  gap: 2rem;
}

@media (min-width: 48rem) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.plain {
  margin: 0;
  padding-left: 1.1rem;
}

.plain li + li {
  margin-top: 0.6rem;
}

/* Start. */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
  margin: 0 0 2rem;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

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

.steps h3::before {
  content: counter(step);
  display: inline-grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  margin-right: 0.6rem;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 0.4rem;
  background: var(--bg);
  font-family: var(--mono);
  font-size: 0.95rem;
}

/* Footer. */

.site-footer {
  padding-block: 2.5rem 3rem;
  border-top: 1px solid var(--line);
  background: var(--sunken);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer .wordmark {
  margin-bottom: 0.75rem;
}

.credits {
  max-width: 52rem;
}