:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --danger: #b91c1c;
  --ok: #047857;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 560px; margin: 0 auto; padding: 24px 16px; }
h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); font-size: 13px; }
.card { border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin: 16px 0; }
.amount { font-size: 28px; font-weight: 650; letter-spacing: -0.01em; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 16px; }
.chip { background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; font-size: 12px; }
button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 0; border-radius: 8px; padding: 11px 16px; font: inherit; font-weight: 600;
  background: var(--accent); color: var(--accent-text); cursor: pointer; text-decoration: none;
}
button.block { width: 100%; }
button.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
button.link { background: none; color: var(--muted); padding: 6px; font-weight: 500; text-decoration: underline; }
button:disabled { opacity: .6; cursor: default; }
label { display: block; font-size: 13px; font-weight: 600; margin: 10px 0 4px; }
input[type=text], input[type=password] {
  width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px; font: inherit; background: var(--bg); color: var(--text);
}
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 12px; }
.checks label { font-weight: 400; display: flex; gap: 6px; align-items: center; margin: 4px 0; }
.status { display: inline-block; font-size: 12px; font-weight: 600; border-radius: 999px; padding: 1px 8px; }
.status.on { background: #d1fae5; color: var(--ok); }
.status.off { background: var(--surface); color: var(--muted); }
.msg { border-radius: 8px; padding: 10px 12px; margin: 12px 0; font-size: 14px; }
.msg.error { background: #fef2f2; color: var(--danger); }
.msg.ok { background: #ecfdf5; color: var(--ok); }
.row { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.center { text-align: center; }
.spinner { width: 28px; height: 28px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; margin: 8px auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }
[hidden] { display: none !important; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418; --surface: #1b2027; --text: #e5e7eb; --muted: #9ca3af; --border: #2b313a;
    --accent: #14b8a6; --accent-text: #04201d; color-scheme: dark;
  }
  .status.on { background: #064e3b; color: #a7f3d0; }
  .msg.error { background: #3b1111; color: #fca5a5; }
  .msg.ok { background: #062e22; color: #a7f3d0; }
}