/* Layout: one centred column (max 1080px); hero splits copy | hero card at >= 860px, stacks below. */
:root {
  /* Alpine Slate, light: AppPalette.ALPINE_SLATE.toColorScheme(dark = false), WayRoundColorScheme.kt */
  --bg: #ECEFF1;            /* background */
  --surface: #FFFFFF;       /* surfaceContainerLowest */
  --surface-2: #EDF6F5;     /* surfaceContainerLow */
  --surface-3: #D6EDEA;     /* surfaceContainer */
  --ink: #1C1B1F;           /* onSurface */
  --ink-soft: #43484D;      /* onSurfaceVariant */
  --line: #BEC6CB;          /* outlineVariant */
  --outline: #6E7B82;       /* outline */
  --primary: #00897B;       /* primary */
  --on-primary: #FFFFFF;    /* onPrimary */
  --primary-c: #B2DFDB;     /* primaryContainer */
  --on-primary-c: #004D40;  /* onPrimaryContainer: links and small primary-coloured text */
  --error: #B00020;
  --error-c: #FFDAD6;
  --on-error-c: #410002;
  --icon-bg: #00897B;       /* AppIconBackground.kt, Alpine Slate; same in dark */
  --hero-grid: #BEC6CB;     /* hero grid + street colour = outlineVariant */
  --shadow: 0 1px 2px rgba(16,24,26,.06), 0 12px 32px -16px rgba(16,24,26,.22);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --maxw: 1080px;
  --r: 16px;
  --r-sm: 10px;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  /* Alpine Slate, dark: toColorScheme(dark = true) */
  --bg: #0D1614; --surface: #151E1C; --surface-2: #192220; --surface-3: #232C2B;
  --ink: #DBE4E3; --ink-soft: #BCC8C7; --line: #3D4A4A; --outline: #87918F;
  --primary: #4DB6AC; --on-primary: #002420; --primary-c: #004D40; --on-primary-c: #B2DFDB;
  --error: #CF6679; --error-c: #930024; --on-error-c: #FFDAD6;
  --hero-grid: #3D4A4A;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 36px -18px rgba(0,0,0,.7);
  color-scheme: dark;
} }
:root[data-theme="dark"] {
  --bg: #0D1614; --surface: #151E1C; --surface-2: #192220; --surface-3: #232C2B;
  --ink: #DBE4E3; --ink-soft: #BCC8C7; --line: #3D4A4A; --outline: #87918F;
  --primary: #4DB6AC; --on-primary: #002420; --primary-c: #004D40; --on-primary-c: #B2DFDB;
  --error: #CF6679; --error-c: #930024; --on-error-c: #FFDAD6;
  --hero-grid: #3D4A4A;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 36px -18px rgba(0,0,0,.7);
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--font); -webkit-text-size-adjust: 100%; }
a { color: var(--on-primary-c); text-underline-offset: .18em; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { text-wrap: balance; margin: 0; }
p { margin: 0; }

/* ---------------- Site ---------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
@media (max-width: 480px) { .wrap { padding-left: 16px; padding-right: 16px; } }

.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header .wrap { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 19px; letter-spacing: -.01em; }
.brand svg { flex: none; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 18px; }
.site-nav a { font-size: 15px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border: 0; border-radius: 999px;
  background: var(--primary); color: var(--on-primary); font: 700 19px/1 var(--font); text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.06); }
.btn[disabled] { opacity: .6; cursor: progress; }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 15px; font-weight: 700; }
@media (max-width: 480px) { .site-nav .btn-sm { display: none; } }

/* Hero */
.hero { padding-block: 56px 48px; }
.hero .wrap { display: grid; grid-template-columns: 1fr; gap: 36px; align-items: center; }
@media (min-width: 860px) { .hero .wrap { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 56px; } }
.hero-copy { display: grid; gap: 20px; min-width: 0; justify-items: start; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--primary-c); color: var(--on-primary-c);
  font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.chip::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.hero h1 { font-size: clamp(36px, 5.4vw, 58px); line-height: 1.04; letter-spacing: -.03em; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--primary); }
.lede { font-size: 19px; line-height: 1.55; color: var(--ink-soft); max-width: 34ch; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; }
.cta-note { font-size: 15px; color: var(--ink-soft); }
.facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 4px 0 0; padding: 14px 0 0; border-top: 1px solid var(--line); list-style: none; font-size: 14px; color: var(--ink-soft); }
.facts li { display: inline-flex; align-items: center; gap: 7px; }
.facts svg { color: var(--primary); flex: none; }
.hero-card { width: 100%; max-width: 560px; justify-self: center; aspect-ratio: 4 / 3; background: var(--surface); border: 1px solid var(--line);
  border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); }
.hero-card canvas { display: block; width: 100%; height: 100%; }

/* Sections */
.section { padding-block: 56px; border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.15; letter-spacing: -.02em; font-weight: 750; }
.section-head { display: grid; gap: 10px; margin-bottom: 32px; max-width: 60ch; }
.section-head p { color: var(--ink-soft); font-size: 17px; }
.features { display: grid; grid-template-columns: 1fr; gap: 28px 40px; list-style: none; margin: 0; padding: 0; }
@media (min-width: 720px) { .features { grid-template-columns: 1fr 1fr; } }
.feature { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 4px 16px; align-items: start; }
.feature .ic { grid-row: span 2; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--surface-3); color: var(--on-primary-c); }
.feature h3 { font-size: 18px; line-height: 1.3; font-weight: 700; }
.feature p { color: var(--ink-soft); font-size: 16px; max-width: 46ch; }
.steps { display: grid; grid-template-columns: 1fr; gap: 16px; list-style: none; margin: 0; padding: 0; counter-reset: step; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; } }
.steps li { counter-increment: step; display: grid; gap: 6px; padding-top: 14px; border-top: 3px solid var(--primary); }
.steps li::before { content: "Step " counter(step); font: 600 12px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--on-primary-c); }
.steps h3 { font-size: 17px; font-weight: 700; }
.steps p { font-size: 15px; color: var(--ink-soft); }

/* Join */
.join .wrap { display: grid; grid-template-columns: 1fr; gap: 28px; align-items: start; }
@media (min-width: 860px) { .join .wrap { grid-template-columns: minmax(0, 1fr) minmax(0, 460px); gap: 56px; } }
.join-copy { display: grid; gap: 12px; min-width: 0; }
.join-copy p { color: var(--ink-soft); font-size: 17px; max-width: 44ch; }
.join-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; box-shadow: var(--shadow); min-width: 0; }
@media (max-width: 400px) { .join-card { padding: 16px 12px; } }
.join-form { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 650; font-size: 15px; }
.field input { font: 17px/1.3 var(--font); color: var(--ink); background: var(--surface-2); border: 1px solid var(--outline); border-radius: var(--r-sm); padding: 12px 14px; width: 100%; min-height: 48px; }
.field input[aria-invalid="true"] { border-color: var(--error); border-width: 2px; padding: 11px 13px; }
.field select { font: 17px/1.3 var(--font); color: var(--ink); background: var(--surface-2); border: 1px solid var(--outline); border-radius: var(--r-sm); padding: 12px 14px; width: 100%; min-height: 48px; }
.field select[aria-invalid="true"] { border-color: var(--error); border-width: 2px; padding: 11px 13px; }
.row { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 420px) { .join-card .row { grid-template-columns: 1fr 1fr; } }
.commit { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; align-items: start; font-size: 15px; padding: 12px; border-radius: var(--r-sm); background: var(--surface-2); border: 1px solid var(--line); }
.commit input { width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--primary); }
.commit[data-invalid="true"] { border-color: var(--error); border-width: 2px; padding: 11px; }
.commit a { white-space: nowrap; }
.helper { font-size: 14px; color: var(--ink-soft); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.consent { font-size: 14px; color: var(--ink-soft); }
.form-error { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: var(--r-sm); background: var(--error-c); color: var(--on-error-c); font-size: 15px; }
.form-error svg { flex: none; margin-top: 2px; }
.join-form .btn { width: 100%; }
.sent { display: grid; gap: 10px; justify-items: start; }
.sent .tick { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--primary-c); color: var(--on-primary-c); }
.sent p { font-size: 17px; }
.ios-line { margin-top: 14px; font-size: 14px; color: var(--ink-soft); display: flex; gap: 8px; align-items: center; }

/* Support */
.page-head { padding-block: 48px 8px; }
.page-head h1 { font-size: clamp(34px, 5vw, 48px); letter-spacing: -.025em; font-weight: 800; line-height: 1.1; }
.page-head p { margin-top: 12px; font-size: 18px; color: var(--ink-soft); max-width: 52ch; }
.support-grid { display: grid; grid-template-columns: 1fr; gap: 40px; padding-block: 32px 64px; }
@media (min-width: 860px) { .support-grid { grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 56px; } }
.contact { display: grid; gap: 18px; align-content: start; min-width: 0; }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; display: grid; gap: 6px; }
.contact-card .label { font: 600 12px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.contact-card a { font-size: 19px; font-weight: 650; overflow-wrap: anywhere; }
.in-app { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.in-app li { display: grid; gap: 2px; }
.in-app strong { font-size: 15px; }
.in-app span { font-size: 14px; color: var(--ink-soft); }
.path { font: 13px/1.5 var(--font-mono); color: var(--ink-soft); }
.faq { display: grid; min-width: 0; }
.faq h2 { font-size: 24px; letter-spacing: -.015em; margin-bottom: 8px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; font-weight: 650; font-size: 17px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-weight: 400; font-size: 22px; line-height: 1; color: var(--on-primary-c); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 0 18px; color: var(--ink-soft); max-width: 62ch; }

.steps-foot { margin-top: 24px; font-size: 16px; }

/* Testing guide */
.guide { display: grid; gap: 44px; padding-block: 32px 72px; max-width: 760px; }
.guide section { display: grid; gap: 14px; min-width: 0; }
.guide h2 { font-size: 24px; letter-spacing: -.015em; font-weight: 750; }
.guide p, .guide li { color: var(--ink-soft); font-size: 17px; }
.guide strong { color: var(--ink); }
.asks { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.asks li { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 12px; align-items: start; }
.asks li::before { content: ""; width: 20px; height: 20px; margin-top: 4px; border-radius: 50%; background: var(--primary-c);
  box-shadow: inset 0 0 0 6px var(--primary-c), inset 0 0 0 20px var(--primary); }
.howto { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: h; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); }
.howto li { counter-increment: h; display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: 12px; padding: 14px 18px; }
.howto li + li { border-top: 1px solid var(--line); }
.howto li::before { content: counter(h); width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--primary-c); color: var(--on-primary-c); font: 700 14px/1 var(--font); }
.ui { font-weight: 650; color: var(--ink); }
.callout { padding: 14px 16px; border-radius: var(--r-sm); background: var(--surface-3); color: var(--ink); font-size: 15px; }
.callout p { color: var(--ink); font-size: 15px; }

/* 404 */
.nf { padding-block: 80px 96px; display: grid; gap: 16px; justify-items: start; }
.nf .code { font: 600 13px/1 var(--font-mono); letter-spacing: .1em; color: var(--ink-soft); }
.nf h1 { font-size: clamp(34px, 5vw, 48px); letter-spacing: -.025em; font-weight: 800; }
.nf p { color: var(--ink-soft); font-size: 18px; max-width: 44ch; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); padding-block: 28px; }
.site-footer .wrap { display: grid; gap: 14px; }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 24px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 8px 20px; list-style: none; margin: 0; padding: 0; font-size: 15px; }
.foot-small { font-size: 13px; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 4px 14px; }
.site-version { font-family: var(--font-mono); }

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

.cf-turnstile { min-height: 65px; max-width: 100%; }