:root {
  --bg: #0b0f17;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --line: rgba(255,255,255,.08);
  --btn: #2563eb;
  --btn2: #1d4ed8;
  --error: #ef4444;
  --ok: #22c55e;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: radial-gradient(1200px 800px at 30% 10%, #172554 0%, var(--bg) 55%);
  color: var(--text);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 18px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 2px 16px;
}

.brand { font-weight: 700; letter-spacing: 0.2px; }
.badge {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
}

.card {
  background: rgba(17, 24, 39, .92);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}

h1 { margin: 0 0 6px; font-size: 22px; }
.muted { color: var(--muted); }
.tiny { font-size: 12px; margin-top: 10px; }

.form { margin-top: 14px; display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 14px; }

input, textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.22);
  color: var(--text);
  outline: none;
}
input:focus, textarea:focus { border-color: rgba(37, 99, 235, .7); }

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 12px 14px;
  font-weight: 700;
  color: white;
  background: linear-gradient(180deg, var(--btn) 0%, var(--btn2) 100%);
  cursor: pointer;
}
.btn:disabled { opacity: .6; cursor: not-allowed; }

.error, .success {
  border-radius: 12px;
  padding: 12px;
  font-size: 14px;
}
.error { border: 1px solid rgba(239, 68, 68, .35); background: rgba(239, 68, 68, .12); }
.success { border: 1px solid rgba(34, 197, 94, .35); background: rgba(34, 197, 94, .12); }
.hidden { display: none; }

.footer { padding: 14px 2px; text-align: center; }

@media (max-width: 640px) {
  .row { grid-template-columns: 1fr; }
}