:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-soft: #f6f4ff;
  --card: #ffffff;
  --text: #1e1d33;
  --muted: #5d5b78;
  --border: #e4e1f5;
  --accent: #5b57c9;
  --accent-strong: #4742b0;
  --accent-text: #ffffff;
  --link: #4742b0;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(60, 50, 140, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14131f;
    --bg-soft: #1b1a2b;
    --card: #1e1d30;
    --text: #f1f0fb;
    --muted: #aaa8c6;
    --border: #2f2d47;
    --accent: #8b87f0;
    --accent-strong: #a4a1f5;
    --accent-text: #14131f;
    --link: #a4a1f5;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; height: auto; }
a { color: var(--link); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 1.25rem; }
.skip-link {
  position: absolute; inset-inline-start: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-text); padding: .6rem 1rem;
}
.skip-link:focus { inset-inline-start: 0; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center;
  gap: 1rem; min-height: 60px; flex-wrap: wrap; padding-top: .4rem; padding-bottom: .4rem;
}
.brand {
  display: inline-flex; align-items: center; gap: .6rem;
  font-weight: 700; color: var(--text); text-decoration: none; font-size: 1.02rem;
}
.brand { margin-inline-end: auto; }
.brand img { border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: .25rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-weight: 600; font-size: .96rem;
  padding: .45rem .75rem; border-radius: 999px;
}
.site-nav a:hover { color: var(--text); background: var(--bg-soft); }
.site-nav a[aria-current="page"] { color: var(--accent-strong); background: var(--bg-soft); }
.site-nav .nav-cta { background: var(--accent); color: var(--accent-text); margin-inline-start: .35rem; }
.site-nav .nav-cta:hover { background: var(--accent-strong); color: var(--accent-text); }

@media (max-width: 640px) {
  .brand span { font-size: .95rem; }
  .lang-switch { order: 2; }
  .site-nav { order: 3; width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: .25rem; }
  .site-nav a { white-space: nowrap; }
  .site-nav .nav-cta { margin-inline-start: auto; }
}

/* ---------- Language switcher ---------- */
.lang-toggle {
  cursor: pointer; user-select: none; font: inherit;
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .38rem .75rem .38rem .55rem; border: 1px solid var(--border); border-radius: 999px;
  background: var(--card); color: var(--muted); font-weight: 600; font-size: .9rem; line-height: 1.2;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.lang-toggle:hover { color: var(--text); background: var(--bg-soft); border-color: var(--accent); }
.lang-flag { flex: none; display: block; border-radius: 3px; box-shadow: 0 0 0 1px rgba(0, 0, 0, .14); object-fit: cover; }
.lang-toggle .lang-flag { width: 20px; height: 15px; }
.lang-caret { flex: none; }

.lang-dialog {
  position: fixed; inset: 0; width: 100%; height: 100%; max-width: none; max-height: none;
  margin: 0; padding: 1.25rem; border: 0; background: transparent; color: var(--text);
  overflow-y: auto; overscroll-behavior: contain;
}
.lang-dialog[open] { display: flex; align-items: center; justify-content: center; }
.lang-dialog::backdrop {
  background: color-mix(in srgb, var(--bg) 55%, rgba(20, 19, 40, .72));
  -webkit-backdrop-filter: blur(14px) saturate(160%); backdrop-filter: blur(14px) saturate(160%);
}
html.lang-open { overflow: hidden; }
.lang-panel {
  width: min(760px, 100%); margin: auto; padding: 1.5rem;
  background: var(--card); border: 1px solid var(--border); border-radius: 24px;
  box-shadow: 0 30px 80px rgba(30, 20, 90, .35);
}
.lang-head { display: flex; align-items: center; gap: .7rem; margin-bottom: 1.25rem; }
.lang-head .lang-icon { flex: none; color: var(--accent); }
.lang-head h2 { margin: 0; margin-inline-end: auto; font-size: 1.35rem; line-height: 1.2; letter-spacing: -.01em; }
.lang-close {
  display: grid; place-items: center; width: 40px; height: 40px; padding: 0; cursor: pointer;
  border: 1px solid var(--border); border-radius: 50%; background: var(--bg-soft); color: var(--muted);
  transition: background .15s ease, color .15s ease, transform .15s ease;
}
.lang-close:hover { color: var(--text); background: var(--border); transform: rotate(90deg); }
.lang-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .6rem;
  margin: 0; padding: 0; list-style: none;
}
.lang-option {
  position: relative; display: flex; align-items: center; gap: .85rem; height: 100%;
  padding: .8rem 1rem; border: 1px solid var(--border); border-radius: 14px;
  background: var(--bg); color: var(--text); text-decoration: none; font-weight: 600; font-size: 1.02rem;
  transition: transform .15s ease, border-color .15s ease, background .15s ease, box-shadow .15s ease;
}
.lang-option .lang-flag { width: 32px; height: 24px; border-radius: 4px; }
.lang-name { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.lang-check { flex: none; opacity: 0; color: var(--accent-text); background: var(--accent); border-radius: 50%; padding: 3px; }
.lang-option:hover { transform: translateY(-2px); border-color: var(--accent); background: var(--bg-soft); box-shadow: var(--shadow); }
.lang-option[aria-current="true"] { border-color: var(--accent); background: var(--bg-soft); color: var(--accent-strong); }
.lang-option[aria-current="true"] .lang-check { opacity: 1; }

@media (prefers-reduced-motion: no-preference) {
  .lang-dialog[open] .lang-panel { animation: lang-pop .22s cubic-bezier(.2, .8, .3, 1); }
  .lang-dialog[open]::backdrop { animation: lang-fade .22s ease; }
}
@keyframes lang-pop { from { opacity: 0; transform: translateY(14px) scale(.97); } }
@keyframes lang-fade { from { opacity: 0; } }
@media (max-width: 520px) {
  .lang-dialog { padding: .75rem; }
  .lang-panel { padding: 1.1rem; border-radius: 20px; }
  .lang-grid { grid-template-columns: 1fr 1fr; gap: .5rem; }
  .lang-option { padding: .7rem .75rem; gap: .6rem; font-size: .95rem; }
  .lang-option .lang-check { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; flex-direction: column; justify-content: center;
  text-decoration: none; border-radius: 14px; font-weight: 700; line-height: 1.15;
}
.btn-primary { background: #111; color: #fff; border: 1px solid #111; }
.btn-primary:hover { background: #000; }
@media (prefers-color-scheme: dark) {
  .btn-primary { background: #fff; color: #111; border-color: #fff; }
  .btn-primary:hover { background: #ececf8; }
}
/* App Store badge: always black with a grey outline, as in Apple's artwork */
.btn-lg { padding: .55rem 1.4rem .55rem 1.1rem; min-width: 190px; flex-direction: row; align-items: center; gap: .6rem; }
.btn-primary.btn-lg { background: #000; color: #fff; border: 1.5px solid #a6a6a6; border-radius: 10px; }
.btn-primary.btn-lg:hover { background: #1a1a1a; }
.btn-text { display: flex; flex-direction: column; text-align: start; }
.btn-icon { flex: none; }
.btn-small { font-size: .78rem; font-weight: 500; letter-spacing: .03em; }
.btn-big { font-size: 1.6rem; font-weight: 600; letter-spacing: -.01em; margin-top: -.1rem; }
.btn-secondary {
  padding: .8rem 1.3rem; border: 1px solid var(--border); color: var(--text);
  flex-direction: row; align-items: center; background: var(--card);
}
.btn-secondary:hover { background: var(--bg-soft); }

/* ---------- Hero ---------- */
.hero {
  background: radial-gradient(1200px 500px at 80% -10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent), var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem; align-items: center;
  padding-top: 3.5rem; padding-bottom: 3.5rem;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; margin: 0 0 1rem; letter-spacing: -.02em; }
.hero .lead { font-size: 1.2rem; color: var(--muted); margin: 0 0 1.6rem; max-width: 36rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; }
.hero-note { color: var(--muted); font-size: .92rem; margin-top: 1rem; }
.hero-art { display: flex; justify-content: center; }
.hero-art img { width: min(330px, 80%); border-radius: 28px; box-shadow: var(--shadow); }
@media (max-width: 800px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 2.2rem; padding-bottom: 2.4rem; text-align: center; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-art { order: -1; }
  .hero-art img { width: min(220px, 60%); }
}

.page-hero { text-align: center; }
.page-hero .wrap { padding-top: 3rem; padding-bottom: 2.6rem; }
.page-hero h1 { font-size: clamp(2rem, 5vw, 2.8rem); line-height: 1.15; margin: 0 0 .6rem; letter-spacing: -.02em; }
.page-hero .lead { margin: 0 auto; font-size: 1.05rem; color: var(--muted); }

.policy {
  max-width: 780px; margin: 0 auto; padding: 2rem 2rem 2.2rem;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.policy > :first-child { margin-top: 0; }
.policy > :last-child { margin-bottom: 0; }
@media (max-width: 560px) { .policy { padding: 1.3rem 1.1rem 1.5rem; } }

/* ---------- Sections ---------- */
.section { padding: 3.5rem 0; }
.section.alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); line-height: 1.2; letter-spacing: -.015em; margin: 0 0 .6rem; }
.section .sub { color: var(--muted); margin: 0 0 2rem; max-width: 40rem; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; padding: 0; margin: 0; list-style: none; }
.feature {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem;
}
.feature .ico { font-size: 1.6rem; line-height: 1; display: block; margin-bottom: .6rem; }
.feature h3 { font-size: 1.08rem; margin: 0 0 .35rem; }
.feature p { margin: 0; color: var(--muted); font-size: .98rem; }

.shots {
  display: flex; gap: 1rem; overflow-x: auto; padding: .5rem .25rem 1.2rem;
  scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
}
.shots figure { margin: 0; flex: 0 0 min(260px, 70vw); scroll-snap-align: center; }
.shots img { width: 100%; border-radius: 22px; border: 1px solid var(--border); box-shadow: var(--shadow); display: block; }
.shots figcaption { text-align: center; color: var(--muted); font-size: .9rem; margin-top: .6rem; }

.steps { counter-reset: s; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); padding: 0; list-style: none; }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem; }
.steps li::before {
  content: counter(s); display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%;
  background: var(--accent); color: var(--accent-text); font-weight: 700; margin-bottom: .6rem;
}
.steps h3 { margin: 0 0 .3rem; font-size: 1.05rem; }
.steps p { margin: 0; color: var(--muted); font-size: .98rem; }

.cta-band { text-align: center; padding: 3.5rem 0; }
.cta-band .btn { margin-top: .6rem; }

/* ---------- Prose / articles / privacy ---------- */
.narrow { max-width: 760px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
.prose h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .3rem; }
.prose h2 { font-size: 1.3rem; margin: 2.2rem 0 .5rem; line-height: 1.3; }
.prose h3 { font-size: 1.1rem; margin: 1.6rem 0 .4rem; }
.prose p, .prose ul, .prose ol { margin: 0 0 1rem; }
.prose li { margin-bottom: .35rem; }
.prose img { border-radius: 14px; }
.prose blockquote { margin: 1.2rem 0; padding: .2rem 1.1rem; border-inline-start: 4px solid var(--accent); color: var(--muted); }
.prose table { border-collapse: collapse; width: 100%; margin: 1rem 0 1.4rem; font-size: .96rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: .55rem .75rem; text-align: start; }
.prose th { background: var(--bg-soft); }
.updated { color: var(--muted); font-size: .92rem; margin: 0 0 1.6rem; }
.narrow h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .4rem; }
.narrow .sub { color: var(--muted); margin: 0 0 1rem; }

.article { max-width: 760px; padding-top: 2rem; padding-bottom: 4rem; }
.article-header h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.15; letter-spacing: -.02em; margin: .4rem 0 .5rem; }
.meta, .breadcrumbs { color: var(--muted); font-size: .92rem; }
.breadcrumbs a { color: var(--muted); }
.article-hero { width: 100%; margin: 1.2rem 0 1.6rem; }

.faq details { border: 1px solid var(--border); border-radius: 12px; padding: .9rem 1.1rem; margin-bottom: .7rem; background: var(--card); }
.faq summary { cursor: pointer; font-weight: 650; }
.faq details p { margin: .6rem 0 0; color: var(--muted); }

.cta-card {
  display: flex; gap: 1.2rem; align-items: center; margin: 2.5rem 0 1.5rem; padding: 1.4rem;
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-soft);
}
.cta-card img { border-radius: 18px; flex: none; }
.cta-card h2 { margin: 0 0 .2rem; font-size: 1.2rem; }
.cta-card p { margin: 0 0 .8rem; color: var(--muted); }
@media (max-width: 560px) { .cta-card { flex-direction: column; text-align: center; } }

.related ul { padding-inline-start: 1.2rem; }

.article-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 1rem; }
.article-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 1.3rem 1.4rem; background: var(--card);
}
.article-card h2 { margin: 0 0 .3rem; font-size: 1.25rem; line-height: 1.3; }
.article-card h2 a { color: var(--text); text-decoration: none; }
.article-card h2 a:hover { color: var(--link); text-decoration: underline; }
.article-card p { margin: .3rem 0 0; color: var(--muted); }

/* ---------- Privacy page banner ---------- */
.app-banner {
  display: flex; gap: 1rem; align-items: center; flex-wrap: wrap;
  border: 1px solid var(--border); background: var(--bg-soft); border-radius: var(--radius);
  padding: 1rem 1.2rem; margin-bottom: 2rem;
}
.app-banner img { border-radius: 14px; flex: none; }
.app-banner .txt { flex: 1 1 220px; }
.app-banner strong { display: block; font-size: 1.05rem; }
.app-banner span { color: var(--muted); font-size: .95rem; }
.app-banner .btn-lg { min-width: 0; padding: .55rem 1.1rem; }
.app-banner .btn-big { font-size: 1.1rem; }
.app-banner .btn-icon { width: 22px; height: 27px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0 3rem; color: var(--muted); font-size: .92rem; background: var(--bg-soft); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin-bottom: .8rem; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 0; }

/* ---------- Non-Latin scripts ---------- */
/* Negative tracking breaks Arabic letter joining and looks cramped in CJK. */
html:is(:lang(ar), :lang(zh), :lang(ja), :lang(ko)) :is(h1, h2, h3, .btn-small, .btn-big) { letter-spacing: normal; }
html:lang(ar) body { line-height: 1.85; }
html:is(:lang(zh), :lang(ja), :lang(ko)) body { line-height: 1.75; }
.hero h1, .page-hero h1 { overflow-wrap: break-word; }

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