:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #05070a;
  color: #f8fafc;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(18px, env(safe-area-inset-right)) max(18px, env(safe-area-inset-bottom)) max(18px, env(safe-area-inset-left));
  background:
    radial-gradient(circle at 50% 0%, rgba(22, 163, 74, 0.22), transparent 38%),
    linear-gradient(180deg, #0b1220 0%, #05070a 62%);
}
.shell { width: min(440px, 100%); }
.card {
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 28px;
  padding: 28px;
  background: rgba(15, 23, 42, 0.82);
  box-shadow: 0 24px 90px rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(20px);
}
.topline { display: flex; gap: 8px; align-items: center; color: #cbd5e1; font-size: 14px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #64748b; box-shadow: 0 0 0 5px rgba(100,116,139,.14); }
.dot.ok { background: #22c55e; box-shadow: 0 0 0 5px rgba(34,197,94,.15); }
.dot.warn { background: #f59e0b; box-shadow: 0 0 0 5px rgba(245,158,11,.16); }
h1 { margin: 18px 0 8px; font-size: clamp(32px, 8vw, 46px); line-height: .95; letter-spacing: -0.06em; }
.muted { margin: 0 0 24px; color: #94a3b8; }
.pin-form, .controls { display: grid; gap: 12px; }
input, button {
  width: 100%;
  min-height: 58px;
  border: 0;
  border-radius: 18px;
  font: inherit;
}
input {
  padding: 0 18px;
  text-align: center;
  font-size: 30px;
  letter-spacing: .35em;
  color: #f8fafc;
  background: rgba(2, 6, 23, .72);
  outline: 1px solid rgba(148, 163, 184, .24);
}
input:focus { outline: 2px solid #22c55e; }
button { cursor: pointer; font-weight: 800; color: #04130a; background: #22c55e; transition: transform .12s ease, opacity .12s ease, background .12s ease; }
button:active { transform: translateY(1px) scale(.99); }
button:disabled { cursor: wait; opacity: .55; }
.primary { min-height: 76px; font-size: 22px; background: #22c55e; }
.secondary { background: #e2e8f0; color: #020617; }
.ghost { background: rgba(148, 163, 184, .15); color: #e2e8f0; }
.logout { min-height: 46px; background: transparent; color: #94a3b8; }
.state-box { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 16px; border-radius: 18px; background: rgba(2, 6, 23, .66); color: #94a3b8; }
.state-box strong { color: #f8fafc; font-size: 24px; }
.hidden { display: none !important; }
.message { min-height: 22px; margin: 16px 0 0; color: #cbd5e1; }
.message.error { color: #fca5a5; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 420px) {
  .card { padding: 22px; border-radius: 24px; }
}