[hidden] { display: none !important; }
:root { --bg: #f5f6f8; --card: #fff; --text: #16181d; --muted: #6b7280; --accent: #2a7ae2; --err: #c62828; --line: #e5e7eb; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #111317; --card: #1a1d23; --text: #e8eaed; --muted: #9aa0a6; --accent: #5aa0ff; --err: #ff6b6b; --line: #2b2f37; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.card { max-width: 480px; margin: 32px auto; background: var(--card); border-radius: 14px; padding: 24px 20px; }
@media (max-width: 520px) { .card { margin: 0; border-radius: 0; min-height: 100vh; padding: 20px 16px; } }
h1 { font-size: 22px; margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--err); }
.balance { font-size: 18px; }
.packages { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 10px; }
.packages button { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: transparent; color: var(--text);
  font: inherit; cursor: pointer; text-align: left; }
.packages button:hover { border-color: var(--accent); }
.packages button:disabled { opacity: .6; cursor: progress; }
.price { font-weight: 600; white-space: nowrap; }
.bonus { color: var(--accent); font-size: 13px; }