:root {
  --bg: #0f1115;
  --card: #181b22;
  --line: #272b35;
  --text: #e6e8ec;
  --muted: #9aa1ad;
  --accent: #4c8bf5;
  --danger: #e5534b;
  --ok: #3fb950;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 -apple-system, Segoe UI, Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; border-bottom: 1px solid var(--line); background: var(--card);
}
.topbar .brand { font-weight: 700; font-size: 18px; color: var(--text); }
.topbar nav a { margin-left: 16px; color: var(--muted); }
.container { max-width: 920px; margin: 0 auto; padding: 24px 20px 60px; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 17px; margin: 0 0 12px; }
h3 { font-size: 16px; margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px; margin: 16px 0;
}
.cards { display: grid; gap: 12px; }
.topic-card { display: block; color: var(--text); }
.topic-card:hover { border-color: var(--accent); text-decoration: none; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; margin-top: 8px; color: var(--muted); }
.badge { font-size: 12px; padding: 2px 10px; border-radius: 20px; border: 1px solid var(--line); }
.badge.on { color: var(--ok); border-color: var(--ok); }
.badge.off { color: var(--muted); }
.form { display: grid; gap: 12px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, textarea, button {
  font: inherit; color: var(--text); background: #11141a;
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px;
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
button { cursor: pointer; background: #222633; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--danger); border-color: var(--danger); }
.link-danger { background: none; border: none; color: var(--danger); padding: 0; }
.actions { display: flex; gap: 10px; margin: 14px 0; flex-wrap: wrap; }
.actions form { margin: 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }
.list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.list li { border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.form-inline { display: flex; gap: 8px; margin-top: 12px; }
.form-inline input { flex: 1; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.tbl td.ok { color: var(--ok); }
.tbl td.err { color: var(--danger); }
code { background: #11141a; padding: 2px 6px; border-radius: 4px; }
.error { color: var(--danger); margin: 8px 0; }
.login-wrap { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.login-card { width: 320px; text-align: center; }
.login-card h1 { margin: 0; }
.login-card input, .login-card button { width: 100%; margin-top: 12px; }