:root {
  --bg: #0b0620; --surface: rgba(255, 255, 255, .055); --surface2: rgba(255, 255, 255, .09);
  --text: #f4f2ff; --muted: #b3abd6; --line: rgba(255, 255, 255, .13);
  --grad: linear-gradient(92deg, #8b5cf6, #6366f1 45%, #22d3ee);
  --ok: #34d399; --err: #fb7185; --warn: #fbbf24; --radius: 20px;
}
* { box-sizing: border-box; }
body {
  margin: 0; color: var(--text); line-height: 1.6; font-family: "Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(640px 420px at 12% -6%, rgba(139, 92, 246, .42), transparent 62%), var(--bg);
  background-attachment: fixed; min-height: 100vh;
}
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }
header { position: sticky; top: 0; z-index: 20; backdrop-filter: blur(14px); background: rgba(11, 6, 32, .62); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 0; flex-wrap: wrap; }
.brand { font-size: 1.18rem; font-weight: 800; }
.brand span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 20px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 600; }
.nav-links a:hover { color: var(--text); }
.hero { padding: 64px 0 40px; }
.hero h1 { font-size: clamp(2rem, 6vw, 3.2rem); line-height: 1.1; margin: 16px 0; }
.hero h1 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p, .lead { color: var(--muted); max-width: 620px; }
.btn {
  display: inline-block; background: var(--grad); color: #fff; padding: 12px 24px; border-radius: 999px;
  text-decoration: none; font-weight: 700; font-size: .95rem; border: 0; cursor: pointer;
  box-shadow: 0 10px 28px rgba(99, 102, 241, .45);
}
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); box-shadow: none; }
.btn.danger { background: transparent; color: var(--err); border: 1px solid rgba(251, 113, 133, .4); box-shadow: none; }
.btn:disabled { opacity: .45; cursor: default; }
section { padding: 32px 0; }
section h2 { font-size: 1.5rem; margin: 0 0 8px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
label { display: block; font-size: .9rem; font-weight: 700; margin: 14px 0 5px; }
input { width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255, 255, 255, .06); color: var(--text); font: inherit; }
input:focus { outline: 2px solid rgba(139, 92, 246, .65); outline-offset: 1px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); }
.err { color: var(--err); font-size: .9rem; min-height: 1.2em; }
.ok { color: var(--ok); font-weight: 700; }
.hint { font-size: .84rem; color: var(--muted); }
.qrbox { background: rgba(255, 255, 255, .06); border: 1px solid var(--line); border-radius: 12px; padding: 14px; word-break: break-all; font-family: ui-monospace, monospace; font-size: .85rem; }
code { background: rgba(255, 255, 255, .08); padding: 2px 8px; border-radius: 8px; }
footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: .9rem; margin-top: 12px; }
.row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.row .btn { flex: 1; text-align: center; }