:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #16181d;
  --muted: #5f6672;
  --line: #dde1e7;
  --accent: #2756d6;
  --accent-text: #ffffff;
  --danger: #b42318;
  --ok-bg: #e7f6ec;
  --warn-bg: #fff4e0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1a1d23;
    --text: #e8eaee;
    --muted: #9aa2ae;
    --line: #2c313a;
    --accent: #6f95ff;
    --accent-text: #0b0d12;
    --danger: #ff7a6e;
    --ok-bg: #16301f;
    --warn-bg: #33270f;
  }
}
* { 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;
}
main { max-width: 860px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.6rem; margin: 0 0 8px; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
.lead, .muted { color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin: 16px 0;
  overflow-x: auto;
}
label { display: block; margin: 12px 0 6px; font-weight: 600; }
input {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
button, .button {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}
button.primary, .button.primary, form button[type="submit"]:not(.link) {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}
button.danger { color: var(--danger); border-color: var(--danger); background: transparent; }
button.small { margin: 0; padding: 4px 10px; font-size: 0.875rem; }
button.link { margin: 0; padding: 0; border: 0; color: var(--accent); font-weight: 400; }
form.inline { display: flex; gap: 8px; align-items: stretch; flex-wrap: wrap; }
form.inline input { flex: 1 1 200px; width: auto; font-family: ui-monospace, monospace; letter-spacing: 0.08em; }
form.inline button { margin-top: 0; }
.code {
  font: 600 2.2rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.12em;
  margin: 12px 0;
}
code { font-family: ui-monospace, monospace; font-size: 0.9em; overflow-wrap: anywhere; }
.flash { padding: 10px 14px; border-radius: 8px; background: var(--ok-bg); }
.flash.warn { background: var(--warn-bg); }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.bar nav { display: flex; gap: 16px; align-items: center; }
.bar nav form { margin: 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.925rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
td.ua { color: var(--muted); max-width: 260px; overflow-wrap: anywhere; font-size: 0.85rem; }