:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(20, 28, 48, .92);
  --panel-2: #10182a;
  --text: #f6f8fc;
  --muted: #9ca9bd;
  --line: rgba(255,255,255,.10);
  --accent: #7c9cff;
  --accent-2: #a8baff;
  --danger: #ffb4b4;
  --ok: #b6f7cf;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 0%, rgba(124,156,255,.18), transparent 36%),
    radial-gradient(circle at 90% 100%, rgba(92,229,188,.10), transparent 32%),
    var(--bg);
  color: var(--text);
}

button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.shell {
  width: min(100% - 32px, 560px);
  margin: 0 auto;
  padding: 72px 0 32px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 24px 80px rgba(0,0,0,.35);
  backdrop-filter: blur(18px);
}

.brand { display: flex; gap: 14px; align-items: center; margin-bottom: 28px; }
.brand-mark {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent), #5ee0bc);
  color: #08101f; font-weight: 900; letter-spacing: -.04em;
}

h1 { margin: 0; font-size: 1.55rem; letter-spacing: -.025em; }
.brand p { margin: 5px 0 0; color: var(--muted); font-size: .94rem; }

label { display: block; margin-bottom: 8px; font-weight: 700; }
.secret-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
input {
  width: 100%; min-width: 0;
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 13px;
  padding: 14px 15px; outline: none;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124,156,255,.14); }
.help { color: var(--muted); font-size: .84rem; margin: 8px 0 18px; }

.primary, .secondary {
  border: 0; border-radius: 13px; cursor: pointer; font-weight: 800;
}
.primary {
  width: 100%; padding: 14px 18px; color: #0a1020;
  background: linear-gradient(135deg, var(--accent-2), #74e6c5);
}
.primary:hover { filter: brightness(1.04); }
.secondary { padding: 0 16px; background: #25314e; color: var(--text); }
.compact { min-width: 66px; }

.result {
  margin-top: 24px; padding: 20px;
  background: rgba(9,15,28,.7); border: 1px solid var(--line); border-radius: 18px;
}
.result-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.account-label { font-weight: 800; }
.issuer-label { color: var(--muted); font-size: .84rem; margin-top: 3px; }
.link-btn { background: transparent; color: var(--muted); border: 0; cursor: pointer; padding: 0; }
.link-btn:hover { color: var(--text); }

.code-button {
  width: 100%; margin: 18px 0 16px; padding: 10px 12px 14px;
  border: 0; border-radius: 16px; background: transparent; color: var(--text); cursor: pointer;
}
.code { display: block; font-size: clamp(2.7rem, 13vw, 4.5rem); line-height: 1; font-weight: 900; letter-spacing: .08em; font-variant-numeric: tabular-nums; }
.copy-hint { display: block; margin-top: 8px; color: var(--muted); font-size: .8rem; }

.timer-track { height: 7px; background: #27314b; border-radius: 999px; overflow: hidden; }
.timer-bar { height: 100%; width: 100%; background: linear-gradient(90deg, #7c9cff, #74e6c5); transform-origin: left center; }
.timer-meta { display: flex; justify-content: space-between; margin-top: 8px; color: var(--muted); font-size: .8rem; }

.message { margin-top: 16px; padding: 11px 13px; border-radius: 12px; font-size: .9rem; }
.message.error { background: rgba(255,90,90,.11); color: var(--danger); border: 1px solid rgba(255,120,120,.24); }
.message.ok { background: rgba(85,220,150,.10); color: var(--ok); border: 1px solid rgba(85,220,150,.22); }

.security { margin-top: 22px; color: var(--muted); font-size: .86rem; }
.security summary { cursor: pointer; color: #c7d0df; }
.security ul { padding-left: 19px; line-height: 1.65; }
footer { text-align: center; color: #66738b; font-size: .78rem; padding: 16px 0; }
.hidden { display: none !important; }

@media (max-width: 520px) {
  .shell { width: min(100% - 20px, 560px); padding-top: 24px; }
  .card { padding: 20px; border-radius: 20px; }
  .brand { align-items: flex-start; }
}