:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: #14171c;
  --border: #232830;
  --fg: #e6e8eb;
  --muted: #8b929c;
  --accent: #4f8cf7;
  --danger: #f05454;
  --ok: #4cd964;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  min-height: 100vh;
}

#app { max-width: 720px; margin: 0 auto; padding: 24px 16px 48px; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 24px 0 8px; color: var(--muted); font-weight: 600; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 12px; }
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font: inherit;
  margin-bottom: 12px;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

button {
  padding: 10px 16px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary { background: transparent; border: 1px solid var(--border); color: var(--fg); }
button.danger { background: var(--danger); }

.row { display: flex; gap: 8px; align-items: center; }
.row.between { justify-content: space-between; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.muted { color: var(--muted); }
.error { color: var(--danger); margin: 8px 0; }
.ok { color: var(--ok); }
.codes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  font-family: ui-monospace, monospace;
  background: var(--bg);
  padding: 12px;
  border-radius: 6px;
  margin: 12px 0;
}
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 10px 0; border-bottom: 1px solid var(--border); }
ul.plain li:last-child { border-bottom: none; }
a { color: var(--accent); }