:root {
  --bg: #0b0b13;
  --bg-2: #141421;
  --card: rgba(255,255,255,0.035);
  --card-br: rgba(255,255,255,0.08);
  --text: #f4f4fa;
  --muted: #8a8aa0;
  --accent: #7c5cff;
  --accent-2: #5b8cff;
  --accent-soft: rgba(124,92,255,.15);
  --ok: #4ade80;
  --warn: #fbbf24;
  --danger: #ff5c7a;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); }
body {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% -10%, rgba(124,92,255,.14), transparent 55%),
    radial-gradient(circle at 120% 120%, rgba(91,140,255,.10), transparent 55%),
    var(--bg);
}

.card {
  width: 100%; max-width: 460px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border: 1px solid var(--card-br);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
}

.logo {
  width: 48px; height: 48px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 800; color: #fff;
  box-shadow: 0 10px 28px rgba(124,92,255,.35);
  margin-bottom: 18px;
}

h1 { margin: 0 0 6px; font-size: 22px; letter-spacing: -.01em; }
p  { margin: 0 0 14px; color: var(--muted); font-size: 14px; line-height: 1.5; }
.muted { color: var(--muted); }

.price {
  margin: 18px 0;
  display: flex; align-items: baseline; gap: 4px;
}
.price-cur { color: var(--muted); font-weight: 600; }
.price-val {
  font-size: 44px; font-weight: 800; letter-spacing: -.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.price-meta { color: var(--muted); font-size: 13px; margin-left: 8px; }

.features {
  list-style: none; padding: 0; margin: 18px 0;
  display: grid; gap: 8px; font-size: 14px;
}
.features li { display: flex; gap: 10px; align-items: flex-start; }
.features li::before {
  content: "✓"; color: var(--accent); font-weight: 800;
  flex-shrink: 0; width: 20px; height: 20px;
  background: var(--accent-soft); border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px;
}

.field { display: grid; gap: 6px; margin-bottom: 12px; }
.field span { font-size: 13px; font-weight: 600; color: var(--text); }
.field input, .field textarea {
  font: inherit; color: var(--text);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--card-br);
  border-radius: 10px;
  padding: 11px 13px;
  outline: none; transition: border-color .15s, background .15s;
}
.field input:focus, .field textarea:focus {
  border-color: var(--accent);
  background: rgba(124,92,255,.06);
}

.btn {
  font: inherit; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 16px; border-radius: 10px;
  font-size: 14px; font-weight: 600;
  border: 1px solid transparent;
  transition: transform .1s, filter .15s;
  width: 100%;
}
.btn:active { transform: scale(.98); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
}
.btn.primary:hover { filter: brightness(1.1); }
.btn.ghost {
  background: transparent; color: var(--text);
  border-color: var(--card-br);
}
.btn.ghost:hover { background: rgba(255,255,255,.04); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.err  { color: var(--danger); font-size: 13px; margin: 6px 0 0; min-height: 18px; }
.note { color: var(--muted); font-size: 12px; margin: 12px 0 0; line-height: 1.5; }

.key-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 20px; font-weight: 700; letter-spacing: .04em;
  text-align: center; color: #fff;
  padding: 18px; border-radius: 12px;
  background: rgba(124,92,255,.1);
  border: 1px solid rgba(124,92,255,.35);
  margin: 14px 0;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.row { display: flex; gap: 8px; }
.row .btn { flex: 1; }