:root {
  --bg: #0b0b10;
  --panel: #15151d;
  --text: #f4f4f7;
  --muted: #a3a3b2;
  --line: #262633;
  --accent: #fa4f4a;
  --grad: linear-gradient(120deg, #fc8c61 0%, #9e40d9 50%, #294ddb 100%);
  --radius: 22px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img, video { max-width: 100%; display: block; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* Header */
header.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 11, 16, 0.75);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-bottom: 1px solid var(--line);
}
header.top .wrap { display: flex; align-items: center; gap: 12px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; }
.brand img { width: 30px; height: 30px; }
nav { margin-left: auto; display: flex; gap: 22px; font-size: 15px; }
nav a { text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--text); }

/* Hero */
.hero { position: relative; overflow: hidden; text-align: center; padding: 0 0 80px; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: var(--grad); opacity: 0.9;
  mask-image: linear-gradient(to bottom, #000 40%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 40%, transparent 100%);
}
.hero > * { position: relative; }
.notch {
  --line: clamp(27px, 4.3vw, 40px);
  position: relative;
  width: min(720px, 100%); margin: 0 auto;
  background: #000; border-radius: 0 0 36px 36px;
  padding: 44px 28px 26px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
}
/* A window of three lines; the script glides up behind it, like the app. */
.notch .reader {
  height: calc(var(--line) * 3); overflow: hidden;
  -webkit-mask-image: linear-gradient(to bottom, #000 70%, transparent);
  mask-image: linear-gradient(to bottom, #000 70%, transparent);
}
.notch .script { transition: transform 0.6s cubic-bezier(.3,.7,.3,1), opacity 0.5s; }
.notch .script.fade { opacity: 0; }
.notch p {
  margin: 0; font-weight: 650; font-size: clamp(20px, 3.2vw, 30px); line-height: var(--line);
}
.notch .w { color: #fff; transition: color 0.25s; }
.notch .w.said { color: rgba(255,255,255,0.3); }
.notch .cue { font-style: italic; font-weight: 500; font-size: 0.85em; color: rgba(255,255,255,0.5); }
/* Level meter beside the notch: moves only while someone is talking. */
.meter { position: absolute; top: 14px; left: 30px; display: flex; gap: 3px; align-items: center; height: 16px; }
.meter i { width: 4px; height: 4px; border-radius: 2px; background: #fff; transition: height 0.2s; }
.talking .meter i { animation: talk 0.5s ease-in-out infinite alternate; }
.talking .meter i:nth-child(1) { animation-delay: -0.2s; }
.talking .meter i:nth-child(2) { animation-delay: -0.35s; }
.talking .meter i:nth-child(3) { animation-delay: -0.1s; }
.talking .meter i:nth-child(4) { animation-delay: -0.45s; }
.talking .meter i:nth-child(5) { animation-delay: -0.3s; }
@keyframes talk { from { height: 4px; } to { height: 15px; } }

.hero h1 {
  font-size: clamp(38px, 7vw, 76px); line-height: 1.04; letter-spacing: -0.03em;
  margin: 64px auto 18px; max-width: 14ch;
}
.hero .lede { font-size: clamp(18px, 2.3vw, 22px); color: rgba(255,255,255,0.86); max-width: 38ch; margin: 0 auto 32px; }
.cta { display: inline-flex; flex-wrap: wrap; gap: 14px; justify-content: center; align-items: center; }
.store-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: #000; color: #fff; text-decoration: none;
  border: 1px solid rgba(255,255,255,0.35); border-radius: 12px;
  padding: 9px 18px 9px 14px; line-height: 1.1;
}
.store-badge svg { width: 26px; height: 26px; }
.store-badge small { display: block; font-size: 11px; opacity: 0.85; }
.store-badge strong { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.link-btn { color: #fff; font-weight: 600; text-decoration: none; }
.link-btn:hover { text-decoration: underline; }
.req { margin-top: 14px; font-size: 14px; color: rgba(255,255,255,0.7); }

/* Sections */
section { padding: 90px 0; }
section h2 { font-size: clamp(30px, 4.5vw, 48px); letter-spacing: -0.025em; line-height: 1.1; margin: 0 0 14px; }
section .sub { color: var(--muted); font-size: 19px; max-width: 52ch; margin: 0 0 40px; }
.center { text-align: center; }
.center .sub { margin-inline: auto; }

.video-frame {
  border-radius: var(--radius); overflow: hidden; background: #000;
  border: 1px solid var(--line); aspect-ratio: 16 / 9;
  box-shadow: 0 40px 100px rgba(0,0,0,0.5);
}
.video-frame video { width: 100%; height: 100%; object-fit: cover; }

.features { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.feature { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.feature .icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: #000; margin-bottom: 18px; font-size: 22px;
}
.feature h3 { margin: 0 0 8px; font-size: 21px; }
.feature p { margin: 0; color: var(--muted); }

.split { display: grid; gap: 48px; align-items: center; grid-template-columns: 1fr 1.3fr; }
.split img { border-radius: 14px; box-shadow: 0 30px 80px rgba(0,0,0,0.5); }
/* The iPhone screenshot is tall: keep it phone-sized, centred in its column. */
.split img.phone { width: 100%; max-width: 300px; justify-self: center; border: 10px solid #050507; border-radius: 52px; box-shadow: 0 30px 80px rgba(0,0,0,.45); }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }

.shots { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.shots img { border-radius: 14px; border: 1px solid var(--line); }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.steps li { counter-increment: step; display: flex; gap: 16px; align-items: flex-start; }
.steps li::before {
  content: counter(step); flex: none; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 700;
}

.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq summary { cursor: pointer; font-weight: 650; font-size: 18px; }
.faq p { color: var(--muted); margin: 10px 0 0; }

kbd {
  font: 600 13px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #22222c; border: 1px solid #333342; border-bottom-width: 2px;
  border-radius: 6px; padding: 3px 7px;
}

/* Documents (privacy, support) */
.doc { padding: 60px 0 90px; max-width: 720px; }
.doc h1 { font-size: clamp(34px, 5vw, 48px); letter-spacing: -0.025em; margin: 0 0 8px; }
.doc h2 { font-size: 24px; margin: 40px 0 10px; }
.doc p, .doc li { color: #d2d2dc; }
.doc .updated { color: var(--muted); margin-bottom: 30px; }

footer { border-top: 1px solid var(--line); padding: 36px 0 50px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; }
footer nav { margin: 0; }

@media (max-width: 560px) {
  nav { gap: 14px; font-size: 14px; }
  nav .hide-sm { display: none; }
  section { padding: 64px 0; }
  .notch { border-radius: 0 0 26px 26px; padding: 40px 18px 20px; }
}

/* Languages: fonts for scripts the default stack may not cover well */
:lang(ja) body, body:lang(ja) { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", "Noto Sans CJK JP", "Noto Sans JP", system-ui, sans-serif; }
:lang(zh-Hans) body, body:lang(zh-Hans) { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", system-ui, sans-serif; }
:lang(zh-Hant) body, body:lang(zh-Hant) { font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Noto Sans CJK TC", "Noto Sans TC", system-ui, sans-serif; }
:lang(ko) body, body:lang(ko) { font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans CJK KR", "Noto Sans KR", system-ui, sans-serif; word-break: keep-all; }
:lang(ru) body, :lang(uk) body { font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Noto Sans", system-ui, sans-serif; }
:lang(ja) h1, :lang(ja) h2, :lang(zh) h1, :lang(zh) h2, :lang(ko) h1, :lang(ko) h2 { letter-spacing: 0; }
:lang(ja) .hero h1, :lang(zh) .hero h1, :lang(ko) .hero h1 { max-width: 11em; line-height: 1.2; }
:lang(ja) h1, :lang(ja) h2 { word-break: auto-phrase; }
h1, h2, h3 { overflow-wrap: break-word; hyphens: auto; }

/* Language picker (footer). Plain links inside <details>: works without JavaScript. */
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.lang { flex-basis: 100%; }
.lang summary {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer; list-style: none;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--text);
}
.lang summary::-webkit-details-marker { display: none; }
.lang summary::after { content: "▾"; font-size: 11px; color: var(--muted); }
.lang[open] summary::after { content: "▴"; }
.lang summary:hover, .lang summary:focus-visible { border-color: var(--muted); }
.lang ul {
  list-style: none; margin: 14px 0 0; padding: 0;
  display: grid; gap: 4px 18px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.lang a { display: block; padding: 6px 0; text-decoration: none; color: var(--muted); }
.lang a:hover, .lang a:focus-visible { color: var(--text); text-decoration: underline; }
.lang a[aria-current] { color: var(--text); font-weight: 650; }
:focus-visible { outline: 2px solid #fc8c61; outline-offset: 2px; border-radius: 4px; }

/* "This page is available in ..." (English home page, first visit only) */
.lang-banner {
  position: fixed; z-index: 20; left: 16px; right: 16px; bottom: 16px;
  max-width: 460px; margin-inline: auto;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 12px 12px 12px 18px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); font-size: 15px;
}
.lang-banner p { margin: 0; flex: 1 1 180px; }
.lang-banner a {
  background: var(--accent); color: #fff; font-weight: 650; text-decoration: none;
  padding: 7px 14px; border-radius: 999px; white-space: nowrap;
}
.lang-banner button {
  background: none; border: 0; color: var(--muted); font: inherit; font-size: 22px; line-height: 1;
  width: 36px; height: 36px; border-radius: 50%; cursor: pointer;
}
.lang-banner button:hover { color: var(--text); background: #22222c; }

/* Small phones: room for longer nav words in other languages (Поддержка, Assistance).
   The GitHub link stays in the hero and the footer. */
@media (max-width: 420px) {
  .brand { flex: none; gap: 8px; }
  .brand img { width: 26px; height: 26px; }
  header.top nav a[href^="https://github.com"] { display: none; }
}