/* The website of Issues. Colours follow the app's Theme.swift and the backdrop of the README images
   (Tools/readme-images/compose.py), in light and dark. No fonts, scripts or images from other servers. */

:root {
  color-scheme: light dark;
  --bg: #F4F4FA;
  --text: #16171B;
  --text-2: #4F535B;
  --text-3: #6B6F78;
  --accent: #5B63D3;
  --line: rgba(22, 24, 44, 0.10);
  --surface: rgba(255, 255, 255, 0.55);
  --surface-hover: rgba(255, 255, 255, 0.85);
  --button: #16171B;
  --button-text: #FFFFFF;
  --button-hover: #2A2C33;
  --tile: rgba(40, 44, 90, 0.05);
  --device-shadow: rgba(36, 38, 80, 0.28);
  --glow-violet: 143, 150, 242;
  --glow-pink: 217, 139, 196;
  --glow-cyan: 90, 176, 216;
  --glow-violet-a: 0.42;
  --glow-pink-a: 0.20;
  --glow-cyan-a: 0.14;
  --noise: 0.05;
  --tile-shape: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='132' height='92'%3E%3Crect x='6' y='6' width='120' height='80' rx='16' fill='black'/%3E%3C/svg%3E");
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0C10;
    --text: #F0F1F5;
    --text-2: #A9ADBA;
    --text-3: #7D8290;
    --accent: #8F96F2;
    --line: rgba(255, 255, 255, 0.09);
    --surface: rgba(255, 255, 255, 0.04);
    --surface-hover: rgba(255, 255, 255, 0.08);
    --button: #F0F1F5;
    --button-text: #0B0C10;
    --button-hover: #FFFFFF;
    --tile: rgba(255, 255, 255, 0.045);
    --device-shadow: rgba(0, 0, 0, 0.6);
    --glow-violet: 101, 108, 230;
    --glow-pink: 196, 95, 166;
    --glow-cyan: 90, 176, 216;
    --glow-violet-a: 0.80;
    --glow-pink-a: 0.34;
    --glow-cyan-a: 0.22;
    --noise: 0.07;
  }
}

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

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

/* Korean breaks lines between words, as it is written with spaces. Japanese and Chinese headlines break at their
   commas rather than inside a word ("速く" stays whole). */
:lang(ko) { word-break: keep-all; overflow-wrap: anywhere; }
:lang(ja) :is(h1, .lead, .sub), :lang(zh) :is(h1, .lead, .sub) { word-break: keep-all; overflow-wrap: anywhere; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* The backdrop: three soft glows as in the README images, and a fine grain so the gradients don't band.
   Fixed layers, so long pages scroll over them (background-attachment: fixed doesn't work on iOS). */
body::before, body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
}

body::before {
  background:
    radial-gradient(circle max(95vw, 760px) at 50% -5%,
      rgba(var(--glow-violet), var(--glow-violet-a)) 0%,
      rgba(var(--glow-violet), calc(var(--glow-violet-a) * 0.56)) 25%,
      rgba(var(--glow-violet), calc(var(--glow-violet-a) * 0.25)) 50%,
      rgba(var(--glow-violet), calc(var(--glow-violet-a) * 0.06)) 75%,
      rgba(var(--glow-violet), 0) 100%),
    radial-gradient(circle max(60vw, 480px) at 100% 105%,
      rgba(var(--glow-pink), var(--glow-pink-a)) 0%,
      rgba(var(--glow-pink), calc(var(--glow-pink-a) * 0.56)) 25%,
      rgba(var(--glow-pink), calc(var(--glow-pink-a) * 0.25)) 50%,
      rgba(var(--glow-pink), 0) 100%),
    radial-gradient(circle max(55vw, 440px) at 0% 105%,
      rgba(var(--glow-cyan), var(--glow-cyan-a)) 0%,
      rgba(var(--glow-cyan), calc(var(--glow-cyan-a) * 0.56)) 25%,
      rgba(var(--glow-cyan), calc(var(--glow-cyan-a) * 0.25)) 50%,
      rgba(var(--glow-cyan), 0) 100%);
}

body::after {
  z-index: -1;
  opacity: var(--noise);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.5 0 0 0 0 0.5 0 0 0 0 0.5 0 0 0 1.6 -0.3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

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

/* Buttons */

.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 20px 0 18px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.15s ease-out, border-color 0.15s ease-out, transform 0.15s ease-out;
}

.button svg { width: 20px; height: 20px; flex: none; fill: currentColor; }

.button.primary { background: var(--button); color: var(--button-text); }
.button.primary:hover { background: var(--button-hover); }
.button:active { transform: scale(0.98); }

/* Apple's badge, as Apple draws it: black on the light page, white on the dark one, the height of a button. */
.store { display: block; flex: none; border-radius: 8px; transition: transform 0.15s ease-out; }
.store:active { transform: scale(0.98); }
.store img { display: block; height: 48px; width: auto; }

/* Footer */

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 24px;
  padding: 20px clamp(20px, 6vw, 120px) 24px;
  font-size: 13px;
  color: var(--text-3);
}

.footer nav { display: flex; flex-wrap: wrap; gap: 4px 22px; }
.footer a { text-decoration: none; transition: color 0.15s ease-out; }
.footer a:hover { color: var(--text); }
.footer a[aria-current="page"] { color: var(--text); }
.footer-end { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 22px; }

/* The language picker: a globe and the language's name, opening a list above it. */
.language { position: relative; }
.language summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  cursor: pointer;
  transition: color 0.15s ease-out;
}
.language summary::-webkit-details-marker { display: none; }
.language summary:hover, .language[open] summary { color: var(--text); }
.language summary svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.3; }
.language ul {
  position: absolute;
  right: -10px;
  bottom: calc(100% + 10px);
  z-index: 10;
  min-width: 190px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(20, 22, 40, 0.16);
}
.language li a {
  display: block;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--text-2);
  white-space: nowrap;
}
.language li a:hover { background: var(--surface-hover); color: var(--text); }
.language li a[aria-current="true"] { color: var(--text); font-weight: 600; }
@media (prefers-color-scheme: dark) {
  .language ul { box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5); }
}

/* ------------------------------------------------------------------------------------------------------------ */
/* The home page: one screen, no scrolling. */

.home {
  --pad: clamp(24px, 7vw, 132px);
  --copy: clamp(380px, 22vw + 150px, 560px);
  --footer: 64px;
  /* The iPad's width: what is left beside the text, unless the window is too short for it. */
  --ipad: min(calc((100vw - var(--pad) - var(--copy) - 40px) / 1.04), calc((100vh - var(--footer)) * 1.08));
  --ipad: min(calc((100vw - var(--pad) - var(--copy) - 40px) / 1.04), calc((100svh - var(--footer)) * 1.08));
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  padding: 48px var(--pad) 24px;
}

.copy { position: relative; z-index: 2; width: var(--copy); }

.app-icon {
  display: block;
  width: clamp(112px, 4vw + 70px, 156px);
  height: auto;
  margin: 0 0 18px -10px;
}

.home h1 {
  margin: 0;
  font-size: clamp(56px, 6.4vw, 108px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.045em;
}

.lead {
  margin: 22px 0 0;
  font-size: clamp(22px, 1.1vw + 14px, 34px);
  line-height: 1.25;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.lead span { display: block; color: var(--text-2); }

.sub {
  margin: 16px 0 0;
  max-width: 400px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text-3);
  text-wrap: pretty;
}

.home .actions { margin-top: 34px; }

.facts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-3);
}

.facts li { display: inline-flex; align-items: center; gap: 7px; }
.facts svg { width: 14px; height: 14px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* The devices: the iPad runs off the right edge, the iPhone stands in front of its left side. */

.devices {
  position: absolute;
  z-index: 1;
  top: 50%;
  right: calc(var(--ipad) * -0.12);
  width: calc(var(--ipad) * 1.16);
  height: calc(var(--ipad) * 0.762);
  transform: translateY(-50%);
  pointer-events: none;
}

.devices img { display: block; width: 100%; height: auto; }

.devices .ipad {
  position: absolute;
  top: 0;
  right: 0;
  width: var(--ipad);
  filter: drop-shadow(0 calc(var(--ipad) * 0.03) calc(var(--ipad) * 0.045) var(--device-shadow));
}

.devices .iphone {
  position: absolute;
  left: 0;
  bottom: calc(var(--ipad) * -0.07);
  width: calc(var(--ipad) * 0.27);
  filter: drop-shadow(0 calc(var(--ipad) * 0.025) calc(var(--ipad) * 0.035) var(--device-shadow));
}

/* A board's worth of empty tiles behind the devices, like the ones on the icon, fading out towards the edges. */
.tiles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--tile);
  -webkit-mask: var(--tile-shape) 0 0 / 132px 92px repeat,
    radial-gradient(ellipse 60% 70% at 72% 48%, black 0%, transparent 72%);
  -webkit-mask-composite: source-in;
  mask: var(--tile-shape) 0 0 / 132px 92px repeat,
    radial-gradient(ellipse 60% 70% at 72% 48%, black 0%, transparent 72%);
  mask-composite: intersect;
}

.home .footer { position: relative; z-index: 3; }

/* Narrow windows and phones: the text on top, the devices below it, fading out above the footer. */
@media (max-width: 900px), (max-aspect-ratio: 1/1) {
  .home { --copy: min(560px, 100%); --phone: min(44vw, 260px); --ipad: min(104vw, 720px); }

  .hero {
    flex-direction: column;
    align-items: center;
    padding: clamp(28px, 7vh, 72px) 20px 0;
    text-align: center;
  }

  .copy { display: flex; flex-direction: column; align-items: center; }
  .app-icon { width: 104px; height: 104px; margin: 0 0 10px; }
  .sub { margin-left: auto; margin-right: auto; }
  .home .actions, .facts { justify-content: center; }
  .home .actions { margin-top: 28px; }

  .devices {
    position: relative;
    top: auto;
    right: auto;
    flex: 1 0 0;
    align-self: stretch;
    width: auto;
    height: auto;
    min-height: 150px;
    margin: clamp(28px, 5vh, 48px) -20px 0;
    transform: none;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 80px), transparent);
    mask-image: linear-gradient(to bottom, #000 calc(100% - 80px), transparent);
  }

  .devices .ipad { top: 0; right: auto; left: calc(50% - var(--phone) * 0.25); }

  .devices .iphone {
    top: calc(var(--phone) * 0.2);
    bottom: auto;
    left: calc(50% - var(--phone) * 0.78);
    width: var(--phone);
  }

  .tiles {
    -webkit-mask: var(--tile-shape) 0 0 / 132px 92px repeat, radial-gradient(ellipse 110% 40% at 50% 100%, black 0%, transparent 80%);
    -webkit-mask-composite: source-in;
    mask: var(--tile-shape) 0 0 / 132px 92px repeat, radial-gradient(ellipse 110% 40% at 50% 100%, black 0%, transparent 80%);
    mask-composite: intersect;
  }

  .home .footer { flex-direction: column; justify-content: center; padding-top: 12px; text-align: center; }
  .home .footer nav { order: -1; justify-content: center; }
}

@media (max-width: 900px) and (max-height: 860px), (max-aspect-ratio: 1/1) and (max-height: 860px) {
  .sub { display: none; }
}

@media (max-width: 900px) and (max-height: 720px), (max-aspect-ratio: 1/1) and (max-height: 720px) {
  .app-icon { width: 84px; height: 84px; }
  .home h1 { font-size: 52px; }
  .lead { margin-top: 14px; font-size: 21px; }
  .home .actions { margin-top: 22px; }
}

@media (max-width: 900px) and (max-height: 640px), (max-aspect-ratio: 1/1) and (max-height: 640px) {
  .hero { padding-top: 24px; }
  .app-icon { width: 68px; height: 68px; margin-bottom: 6px; }
  .home h1 { font-size: 44px; }
  .lead { margin-top: 10px; font-size: 19px; }
  .home .actions { margin-top: 18px; gap: 10px; }
  .button { height: 44px; }
  .store img { height: 44px; }
  .facts { display: none; }
  .devices { min-height: 110px; margin-top: 20px; }
}

/* Too short for one screen (a phone on its side): let it scroll rather than cut off the text. */
@media (max-height: 500px) {
  .home { overflow: visible; }
}

/* ------------------------------------------------------------------------------------------------------------ */
/* Text pages: privacy, terms, support, legal notice. */

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px clamp(20px, 5vw, 48px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img { width: 34px; height: 34px; margin: -3px 0; }

.top .link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.15s ease-out;
}

.top .link:hover { color: var(--text); }
.top .link svg { width: 18px; height: 18px; fill: currentColor; }

/* The footer stays at the bottom of the window on short pages. */
body:not(.home) { display: flex; flex-direction: column; min-height: 100vh; min-height: 100svh; }
.top, .doc, .doc + .footer { width: 100%; }

.doc {
  flex: 1 0 auto;
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(28px, 7vh, 72px) 20px 56px;
}

.doc h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.doc .intro {
  margin: 18px 0 0;
  font-size: 19px;
  line-height: 1.55;
  color: var(--text-2);
  text-wrap: pretty;
}

.doc .updated { margin: 14px 0 0; font-size: 13px; color: var(--text-3); }

.doc h2 {
  margin: 48px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 21px;
  line-height: 1.3;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.doc h3 { margin: 28px 0 0; font-size: 16px; font-weight: 650; letter-spacing: -0.01em; }

.doc p, .doc ul, .doc address { margin: 12px 0 0; color: var(--text-2); }
.doc address { font-style: normal; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0 0; padding-left: 4px; }
.doc li::marker { color: var(--text-3); }
.doc strong { color: var(--text); font-weight: 600; }
.doc code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font: 0.88em/1.4 ui-monospace, "SF Mono", Menlo, monospace;
}

.doc a { color: var(--accent); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent); text-underline-offset: 3px; }
.doc a:hover { text-decoration-color: var(--accent); }

/* Support: ways to get in touch. */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin: 32px 0 0;
}

.doc .card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: background-color 0.15s ease-out, border-color 0.15s ease-out;
}

.doc .card:hover { background: var(--surface-hover); }
.card svg { width: 22px; height: 22px; margin-bottom: 10px; fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.card svg.filled { fill: var(--accent); stroke: none; }
.card b { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.card span { font-size: 13.5px; line-height: 1.45; color: var(--text-3); overflow-wrap: anywhere; }

/* Support: questions that fold open. */
.faq { margin: 16px 0 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }

.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 2px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  list-style: none;
}

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

.faq summary::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-right: 4px;
  border-right: 1.6px solid var(--text-3);
  border-bottom: 1.6px solid var(--text-3);
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.2s ease-out;
}

.faq details[open] summary::after { transform: translateY(2px) rotate(-135deg); }
.faq details > :not(summary) { margin: 0 2px; }
.faq details > :last-child { padding-bottom: 18px; }

.doc .footer { padding-left: 0; padding-right: 0; }
.doc + .footer { max-width: 720px; margin: 0 auto; padding-left: 20px; padding-right: 20px; border-top: 1px solid var(--line); }

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