/* PinGate site, Quiet Gate (docs/design/DESIGN.md). System face on purpose: the app uses Segoe UI Variable,
   and the site makes no third-party requests (the privacy policy says PinGate tracks nothing). */
:root {
  --bg: #F3F2EC;
  --surface: #FDFCFA;
  --raised: #FFFFFF;
  --well: #F1F0E9;
  --key: #EFEEE7;
  --key-hover: #E6E4DB;
  --key-pressed: #DAD8CE;
  --stroke: rgba(23, 32, 28, .10);
  --stroke-strong: rgba(23, 32, 28, .22);
  --text: #17201C;
  --text-2: #515D57;
  --text-3: #66716B;
  --accent: #0B6B50;
  --accent-hover: #0A5F47;
  --on-accent: #FFFFFF;
  --accent-soft: rgba(11, 107, 80, .10);
  --danger: #B42318;
  --gate-top: #1C5E4B;
  --gate-bottom: #0B3028;
  --on-gate: #F3F7F3;
  --on-gate-2: #BCD2C8;
  --mint: #8FE6C0;
  --gate-line: rgba(255, 255, 255, .07);
  --niche: rgba(255, 255, 255, .10);
  --niche-stroke: rgba(255, 255, 255, .26);
  --keyhole: #0B3028;
  --shadow: 0 1px 2px rgba(20, 26, 23, .06), 0 18px 48px -12px rgba(20, 26, 23, .22);
  --display: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --body: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --ease: cubic-bezier(.16, 1, .3, 1);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1210;
    --surface: #161B18;
    --raised: #1B211E;
    --well: #101412;
    --key: #212824;
    --key-hover: #2A332E;
    --key-pressed: #1A201D;
    --stroke: rgba(255, 255, 255, .08);
    --stroke-strong: rgba(255, 255, 255, .17);
    --text: #EDF2EE;
    --text-2: #A9B4AE;
    --text-3: #8A958F;
    --accent: #74DDB3;
    --accent-hover: #88E6C1;
    --on-accent: #06231A;
    --accent-soft: rgba(116, 221, 179, .14);
    --danger: #FF9E8C;
    --gate-top: #18503F;
    --gate-bottom: #09261F;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 24px 60px -16px rgba(0, 0, 0, .6);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--accent); color: var(--on-accent); }
a { color: var(--accent); text-underline-offset: .2em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
img, svg { display: block; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--raised); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 16px; }

/* Header */
.top { padding: 20px 0; }
.top .wrap { display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font: 600 17px/1 var(--display); }
.brand svg { width: 30px; height: 30px; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a { color: var(--text-2); text-decoration: none; font-size: 14px; font-weight: 600; padding: 8px 10px; border-radius: 8px; }
.nav a:hover { color: var(--text); background: var(--key); }
.nav a[aria-current="page"] { color: var(--text); }
.nav .lang { border: 1px solid var(--stroke-strong); padding: 6px 10px; margin-left: 6px; }

/* Hero */
.hero { padding: 40px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 56px; align-items: center; }
h1 { font: 600 clamp(36px, 5.2vw, 58px)/1.06 var(--display); letter-spacing: -.02em; margin: 0 0 20px; text-wrap: balance; }
.lead { font-size: 18px; line-height: 1.6; color: var(--text-2); margin: 0 0 28px; max-width: 34em; }
.status { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }
/* A status, not a button: the Store link does not exist yet. */
.pill { display: inline-flex; align-items: center; gap: 10px; background: var(--surface); color: var(--text); border: 1px solid var(--stroke-strong); font-weight: 600; font-size: 15px; padding: 10px 16px; border-radius: 10px; }
.pill svg { width: 18px; height: 18px; color: var(--accent); }
.status small { color: var(--text-2); font-size: 14px; }

/* Lock card replica (DESIGN.md 6.1): gate pane | PIN pad */
.demo { margin: 0; }
.card {
  container-type: inline-size;
  display: grid; grid-template-columns: 39% 1fr;
  aspect-ratio: 640 / 420; width: 100%;
  border-radius: 14px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  transition: opacity .38s var(--ease), transform .38s var(--ease);
}
.gate {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--gate-top), var(--gate-bottom));
  color: var(--on-gate); padding: 3.8cqi; display: flex; flex-direction: column;
}
.gate::before, .gate::after {
  content: ""; position: absolute; border: 1px solid var(--gate-line); border-bottom: 0; pointer-events: none;
}
.gate::before { width: 46cqi; height: 80cqi; left: 9cqi; top: 32cqi; border-radius: 23cqi 23cqi 0 0; }
.gate::after { width: 34cqi; height: 80cqi; left: 15cqi; top: 44cqi; border-radius: 17cqi 17cqi 0 0; }
.gate .mini { display: flex; align-items: center; gap: 1.4cqi; font: 600 2.4cqi/1 var(--display); }
.gate .mini svg { width: 2.8cqi; height: 2.8cqi; }
.niche {
  position: relative; width: 14cqi; height: 16cqi; margin: 5cqi 0 3cqi;
  border-radius: 7cqi 7cqi 2cqi 2cqi; background: rgba(143, 230, 192, .22); overflow: hidden;
}
.leaf { position: absolute; top: 0; bottom: 0; width: 50%; background: var(--niche); border: 1px solid var(--niche-stroke); transition: transform .26s var(--ease); }
.leaf.l { left: 0; border-right: 0; border-radius: 7cqi 0 0 2cqi; transform-origin: left; }
.leaf.r { right: 0; border-left: 0; border-radius: 0 7cqi 2cqi 0; transform-origin: right; }
.niche .appicon { position: absolute; inset: 0; margin: auto; width: 8cqi; height: 8cqi; transition: transform .26s var(--ease); transform: scale(.92); }
.gate .name { font: 600 3.75cqi/1.2 var(--display); letter-spacing: -.01em; margin: 0 0 1cqi; }
.gate .hint { font-size: 2.05cqi; line-height: 1.45; color: var(--on-gate-2); margin: 0; }
.pad { padding: 3.8cqi 3.8cqi 3.4cqi; display: grid; grid-template-rows: auto auto 1fr auto; gap: 1.6cqi; }
.field {
  height: 8.2cqi; border-radius: 1.9cqi; background: var(--well); border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center; gap: 1.6cqi;
}
.field i { width: 1.6cqi; height: 1.6cqi; border-radius: 50%; background: var(--text); animation: pop .12s var(--ease); }
.field.ok { background: var(--accent-soft); }
.field.ok i { background: var(--accent); }
.field.wrong { border-color: var(--danger); animation: shake .3s; }
.field.wrong i { background: var(--danger); }
.msg { min-height: 2.4cqi; margin: -.4cqi 0 0; text-align: center; font-size: 1.95cqi; color: var(--text-2); }
.keys { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4cqi; }
.keys button {
  font: 500 3.4cqi/1 var(--display); font-variant-numeric: tabular-nums; color: var(--text);
  background: var(--key); border: 0; border-radius: 1.6cqi; min-height: 6.6cqi; cursor: pointer;
  transition: transform .06s, background-color .12s;
}
.keys button:hover { background: var(--key-hover); }
.keys button:active { background: var(--key-pressed); transform: scale(.97); }
.keys .blank { visibility: hidden; }
.keys .back { background: transparent; color: var(--text-2); }
.keys .back svg { width: 3.2cqi; height: 3.2cqi; margin: auto; }
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4cqi; }
.actions button {
  font: 600 2.3cqi/1 var(--body); border-radius: 1.3cqi; min-height: 6.4cqi; cursor: pointer;
  background: var(--raised); color: var(--text); border: 1px solid var(--stroke-strong);
}
.actions .unlock { background: var(--accent); color: var(--on-accent); border-color: transparent; }
.actions .unlock:disabled { background: var(--key); color: var(--text-3); cursor: default; }
.card.open .leaf { transform: scaleX(0); }
.card.open .appicon { transform: scale(1); }
.card.gone { opacity: 0; transform: scale(.98); }
.demo figcaption { margin-top: 14px; text-align: center; font-size: 14px; color: var(--text-2); }
@keyframes pop { from { transform: scale(.6); opacity: 0; } }
@keyframes shake { 20% { transform: translateX(-12px); } 40% { transform: translateX(9px); } 60% { transform: translateX(-5px); } 80% { transform: translateX(2px); } }

/* Sections */
section { padding: 72px 0; }
h2 { font: 600 clamp(28px, 3.4vw, 38px)/1.15 var(--display); letter-spacing: -.015em; margin: 0 0 16px; text-wrap: balance; }
h3 { font: 600 18px/1.35 var(--display); margin: 0 0 6px; }
.intro { color: var(--text-2); font-size: 17px; max-width: 38em; margin: 0 0 40px; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; counter-reset: step; }
.steps li { counter-increment: step; border-top: 1px solid var(--stroke-strong); padding-top: 22px; }
.steps li::before { content: counter(step); display: block; font: 600 44px/1 var(--display); color: var(--accent); margin-bottom: 18px; font-variant-numeric: tabular-nums; }
.steps p { margin: 0; color: var(--text-2); }

.features { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 56px; margin: 0; }
.features div { padding: 22px 0; border-top: 1px solid var(--stroke); }
.features dt { display: flex; align-items: center; gap: 16px; font-weight: 600; }
.features dt svg { width: 24px; height: 24px; flex: none; color: var(--accent); }
.features dd { margin: 4px 0 0 40px; color: var(--text-2); }

.promise { background: linear-gradient(160deg, var(--gate-top), var(--gate-bottom)); color: var(--on-gate); }
.promise .wrap { display: grid; grid-template-columns: auto 1fr; gap: 40px; align-items: center; }
.promise svg { width: 92px; height: 116px; }
.promise h2 { color: var(--on-gate); }
.promise p { color: var(--on-gate-2); margin: 0 0 18px; max-width: 40em; font-size: 17px; }
.promise a { color: var(--mint); font-weight: 600; }

/* Text pages (privacy, terms, support) */
.doc { padding: 32px 0 80px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(34px, 4.4vw, 46px); margin-bottom: 10px; }
.doc .date { color: var(--text-2); margin: 0 0 32px; }
.doc h2 { font-size: 24px; margin: 44px 0 12px; }
.doc h3 { margin-top: 26px; }
.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 1.2em; }
.doc li { margin: 6px 0; }
.summary { background: var(--surface); border: 1px solid var(--stroke); border-radius: 12px; padding: 20px 24px; margin: 0 0 8px; }
.summary p { margin: 0; }
.contact { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 18px; }
.contact svg { width: 22px; height: 22px; }
details { border-top: 1px solid var(--stroke); padding: 6px 0; }
details:last-of-type { border-bottom: 1px solid var(--stroke); }
summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--text-3); font-weight: 400; font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
details p, details ul { margin-top: 0; color: var(--text-2); }

/* Footer */
.foot { border-top: 1px solid var(--stroke); padding: 32px 0 40px; font-size: 14px; color: var(--text-2); }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.foot a { color: var(--text-2); }
.foot .brand { font-size: 15px; }
.foot .brand svg { width: 22px; height: 22px; }
.foot .copy { margin-left: auto; }

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .steps { grid-template-columns: 1fr; gap: 28px; }
  .features { grid-template-columns: 1fr; }
  .promise .wrap { grid-template-columns: 1fr; gap: 20px; }
  .promise svg { width: 64px; height: 80px; }
  section { padding: 56px 0; }
  .foot .copy { margin-left: 0; }
}
@media (max-width: 560px) {
  .top .wrap { flex-wrap: wrap; gap: 8px; }
  .nav { margin-left: -10px; width: 100%; }
  .hero { padding-top: 16px; }
  .lead { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .1s !important; }
  .card.open .leaf { transform: none; opacity: 0; }
}