/* Structure of every page. style.css sets the tokens below, for light and dark, and the look on top;
   nothing here picks colours or typefaces of its own. */

:root {
  --bg: #fff;
  --fg: #111;
  --muted: #555;
  --line: rgba(0, 0, 0, 0.12);
  --surface: #f4f4f4;
  --accent: #ff9f0a;
  --accent-ink: #111;
  --accent-text: #b36b00;
  --pad-light: #eee;
  --pad-dark: #3a3a3a;
  --font-display: system-ui, sans-serif;
  --font-body: system-ui, sans-serif;
  --radius: 16px;
  --width: 1080px;
  --gutter: 16px;
}

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.1;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

p {
  margin: 0 0 1em;
  text-wrap: pretty;
}

.wrap {
  width: min(var(--width), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

/* Clipped rather than moved off-screen, which in right-to-left pages would widen the page sideways. */
.skip {
  position: absolute;
  inset-inline-start: var(--gutter);
  top: var(--gutter);
  z-index: 10;
  background: var(--bg);
  padding: 8px 12px;
}

.skip:not(:focus) {
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.top nav {
  display: flex;
  gap: 4px 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
  font-size: 0.95rem;
}

.top nav a {
  text-decoration: none;
  color: var(--muted);
}

.top nav a:hover,
.top nav a[aria-current] {
  color: var(--fg);
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 48px;
  padding-block: 56px 88px;
}

.eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 0.75em;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  letter-spacing: -0.02em;
}

.lead {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--muted);
  max-width: 34em;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-top: 28px;
}

.store {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 12px;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
  line-height: 1.2;
}

.store svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.store small {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.75;
}

.cta .req {
  font-size: 0.9rem;
  color: var(--muted);
}

/* Watch: a playable model of the app's main screen. */

.watch {
  margin: 0;
  display: grid;
  justify-items: center;
  gap: calc(min(270px, 72vw) * 0.24 + 20px);
  padding-top: calc(min(270px, 72vw) * 0.24);
}

.watch-body {
  position: relative;
  width: min(270px, 72vw);
  aspect-ratio: 0.84;
}

/* The band, behind the case. */
.watch-body::before {
  content: "";
  position: absolute;
  inset: -20% 18%;
  border-radius: 24px;
  background: var(--band, #2a2a2a);
  z-index: -1;
}

.watch-case {
  position: absolute;
  inset: 0;
  border-radius: 26%/22%;
  padding: 7%;
  background: var(--case, linear-gradient(145deg, #3b3b3d, #151516));
  box-shadow: var(--case-shadow, 0 30px 60px rgba(0, 0, 0, 0.35));
}

.watch-crown {
  position: absolute;
  right: -3.5%;
  top: 24%;
  width: 5%;
  height: 16%;
  border-radius: 4px;
  background: var(--crown, linear-gradient(90deg, #444, #222));
}

.watch-screen {
  width: 100%;
  height: 100%;
  border-radius: 20%/17%;
  background: #000;
  padding: 9% 6% 6%;
  display: flex;
  flex-direction: column;
  gap: 5%;
  overflow: hidden;
}

.watch-status {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-inline: 4%;
  font: 600 clamp(0.72rem, 3.4vw, 0.9rem) / 1 ui-rounded, system-ui, sans-serif;
  color: #fff;
}

.watch-status button {
  all: unset;
  cursor: pointer;
  color: var(--accent);
}

.watch-status button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.pads {
  flex: 1;
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 5px;
}

.pad {
  all: unset;
  cursor: pointer;
  border-radius: 22%/30%;
  display: grid;
  place-items: center;
  font: 500 clamp(0.7rem, 3.4vw, 0.95rem) / 1 ui-rounded, system-ui, sans-serif;
  background: var(--pad-dark);
  color: #fff;
  transition: background 0.35s, box-shadow 0.35s, color 0.35s;
  -webkit-tap-highlight-color: transparent;
}

.pad.light {
  background: var(--pad-light);
  color: #000;
}

/* c, with its octave and in bold, as in the app. */
.pad.home {
  font-weight: 700;
}

.pad.on {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 70%, transparent);
  transition-duration: 0.04s;
}

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

.watch figcaption {
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}

/* Sections */

.section {
  padding-block: 72px;
}

.section-head {
  max-width: 40em;
  margin-bottom: 40px;
}

.section h2 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  letter-spacing: -0.015em;
}

.section-head p {
  color: var(--muted);
  font-size: 1.15rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
}

.card h3 {
  font-size: 1.25rem;
}

.card p {
  color: var(--muted);
  margin: 0;
}

.card .icon {
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  color: var(--accent-text);
}

/* "Na ucho": three steps. */

.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

.steps li {
  counter-increment: step;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
}

.steps li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 1.1rem/1 var(--font-display);
}

.steps h3 {
  font-size: 1.2rem;
}

.steps p {
  color: var(--muted);
  margin: 0;
}

.aside {
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 44em;
}

/* Features: a dense list. */

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 48px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.features li {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.features strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.features span {
  color: var(--muted);
}

/* Privacy callout */

.promise {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: center;
  padding: 40px;
  border-radius: calc(var(--radius) * 1.5);
  background: var(--surface);
}

.promise svg {
  width: 64px;
  height: 64px;
  color: var(--accent-text);
}

.promise h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
}

.promise p {
  color: var(--muted);
  margin: 0;
}

/* Text pages: privacy and support. */

.doc {
  max-width: 44em;
  padding-block: 40px 88px;
}

.doc h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  letter-spacing: -0.02em;
}

.doc h2 {
  font-size: 1.4rem;
  margin-top: 2em;
}

.doc .meta {
  color: var(--muted);
}

.doc ul {
  padding-inline-start: 1.2em;
}

.doc li {
  margin-bottom: 0.4em;
}

.doc details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.doc details:last-of-type {
  border-bottom: 1px solid var(--line);
}

.doc summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

.doc details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.contact {
  margin-top: 40px;
  padding: 24px 28px;
  border-radius: var(--radius);
  background: var(--surface);
}

.contact p:last-child {
  margin: 0;
}

.contact a {
  color: var(--accent-text);
  font-weight: 600;
}

/* Footer */

.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 32px 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.foot nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.foot a {
  text-decoration: none;
}

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

/* Narrow screens */

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 72px;
    padding-block: 24px 64px;
  }

  .cards,
  .steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .features {
    grid-template-columns: 1fr;
  }

  .promise {
    grid-template-columns: 1fr;
    padding: 28px;
  }

  .section {
    padding-block: 48px;
  }

  .top nav a.hide-narrow {
    display: none;
  }
}

/* Light/dark toggle in the header: one icon for the current choice (see theme.js). */

.theme-toggle {
  all: unset;
  cursor: pointer;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-inline-start: 4px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--muted);
}

.theme-toggle:hover {
  color: var(--fg);
}

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

.theme-toggle svg {
  width: 18px;
  height: 18px;
  display: none;
}

:root:not([data-theme-choice]) .theme-toggle .system,
:root[data-theme-choice="system"] .theme-toggle .system,
:root[data-theme-choice="light"] .theme-toggle .light,
:root[data-theme-choice="dark"] .theme-toggle .dark {
  display: block;
}

.top nav {
  align-items: center;
}

/* Language menu in the header. */

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.lang-menu {
  position: relative;
}

.lang-menu summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding-inline: 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}

.lang-menu summary::-webkit-details-marker {
  display: none;
}

.lang-menu summary:hover,
.lang-menu[open] summary {
  color: var(--fg);
}

.lang-menu summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.lang-menu svg {
  width: 18px;
  height: 18px;
}

.lang-menu ul {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + 8px);
  z-index: 20;
  list-style: none;
  margin: 0;
  padding: 6px;
  width: max-content;
  min-width: 200px;
  max-height: min(70vh, 560px);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}

.top nav .lang-menu a {
  display: block;
  padding: 7px 12px;
  border-radius: 8px;
  color: var(--fg);
}

.top nav .lang-menu a:hover {
  background: var(--line);
}

.top nav .lang-menu a[aria-current] {
  color: var(--accent-text);
  font-weight: 600;
}

@media (max-width: 600px) {
  .lang-name {
    display: none;
  }
}

/* Scripts without capitals or italics: no letter spacing (it breaks Arabic's joined letters) and no
   slanted emphasis, which these scripts don't use; the accent colour carries it. */

:lang(ar) .eyebrow,
:lang(he) .eyebrow,
:lang(ja) .eyebrow,
:lang(ko) .eyebrow,
:lang(zh) .eyebrow {
  letter-spacing: 0;
}

:lang(ar) em,
:lang(he) em,
:lang(ja) em,
:lang(ko) em,
:lang(zh) em {
  font-style: normal;
}

:lang(ja) h1,
:lang(ja) h2,
:lang(ko) h1,
:lang(ko) h2,
:lang(zh) h1,
:lang(zh) h2 {
  letter-spacing: 0;
  line-height: 1.25;
  word-break: keep-all;
}

:lang(ar) h1,
:lang(ar) h2,
:lang(he) h1,
:lang(he) h2 {
  letter-spacing: 0;
  line-height: 1.3;
}

/* Accessibility, as in the app: increased contrast, reduced motion, and the system's forced colours. */

@media (prefers-contrast: more) {
  .pad {
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5);
  }

  /* Not by colour alone: the sounding pad also gets a ring. */
  .pad.on {
    outline: 3px solid #fff;
    outline-offset: -3px;
  }

  .lang-menu summary,
  .theme-toggle {
    border-color: var(--fg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

@media (forced-colors: active) {
  .pad {
    border: 1px solid CanvasText;
  }

  .pad.on {
    background: Highlight;
    color: HighlightText;
  }

  .steps li::before {
    border: 1px solid CanvasText;
  }
}