:root {
  --bg: #070711;
  --card: rgba(255,255,255,.08);
  --line: rgba(255,255,255,.14);
  --text: #f7f3ff;
  --muted: #c9bddb;
  --accent: #8b5cf6;
  --accent2: #d8b4fe;
  --danger: #fb7185;
  --ok: #34d399;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Tahoma, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(139,92,246,.35), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(216,180,254,.18), transparent 28rem),
    linear-gradient(135deg, #05050d, #111124 55%, #070711);
}
.shell {
  width: min(94%, 540px);
  margin: 0 auto;
  min-height: 100vh;
  display: grid;
  place-content: center;
  gap: 18px;
}
.card {
  border: 1px solid var(--line);
  background: var(--card);
  backdrop-filter: blur(22px);
  border-radius: 28px;
  padding: 34px;
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
}
.badge {
  display: inline-flex;
  border: 1px solid rgba(216,180,254,.45);
  color: var(--accent2);
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 13px;
  margin-bottom: 16px;
}
h1 { margin: 0 0 12px; font-size: clamp(30px, 7vw, 52px); line-height: 1.05; }
.lead { color: var(--muted); margin: 0 0 26px; line-height: 1.8; }
label { display: block; margin-bottom: 9px; color: var(--accent2); font-weight: 700; }
input {
  width: 100%;
  height: 56px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.28);
  color: var(--text);
  border-radius: 16px;
  padding: 0 16px;
  font-size: 18px;
  outline: none;
  direction: ltr;
  text-align: center;
  letter-spacing: .08em;
}
input:focus { border-color: var(--accent2); box-shadow: 0 0 0 4px rgba(139,92,246,.18); }
button, .download {
  width: 100%;
  height: 56px;
  margin-top: 14px;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #6d28d9);
  color: white;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  display: inline-grid;
  place-items: center;
}
button:disabled { opacity: .6; cursor: not-allowed; }
.msg { min-height: 30px; margin-top: 16px; color: var(--muted); line-height: 1.7; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--ok); }
.download-box {
  margin-top: 16px;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(52,211,153,.28);
  background: rgba(52,211,153,.08);
}
.hidden { display: none; }
.footer { color: rgba(255,255,255,.56); text-align: center; margin: 0; font-size: 13px; }
@media (max-width: 520px) { .card { padding: 24px; border-radius: 24px; } }