* { box-sizing: border-box; }
body {
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  margin: 0;
  background: #0f1115;
  color: #e6e6e6;
}
a { color: #7dc4ff; }
header {
  background: #171a21;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid #262a33;
}
header .brand { font-weight: 700; font-size: 18px; margin-right: 12px; }
header nav a {
  color: #c6c9d0;
  text-decoration: none;
  margin-right: 4px;
  padding: 6px 10px;
  border-radius: 6px;
}
header nav a:hover { background: #23272f; color: #fff; }
header form { margin-left: auto; }
main { padding: 24px; max-width: 1100px; margin: 0 auto; }
h1, h2, h3 { color: #fff; }
table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 24px;
  background: #171a21;
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid #262a33;
  font-size: 14px;
}
th { background: #1d212a; color: #9aa1ad; font-weight: 600; }
tr:hover td { background: #1a1e26; }
.card {
  background: #171a21;
  border: 1px solid #262a33;
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 18px;
}
.stat-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.stat-tile {
  background: #171a21;
  border: 1px solid #262a33;
  border-radius: 10px;
  padding: 16px 20px;
  min-width: 160px;
}
.stat-tile .value { font-size: 24px; font-weight: 700; color: #fff; }
.stat-tile .label { font-size: 13px; color: #9aa1ad; margin-top: 4px; }
input, select, textarea, button {
  font-family: inherit;
  font-size: 14px;
  background: #0f1115;
  color: #e6e6e6;
  border: 1px solid #333844;
  border-radius: 6px;
  padding: 8px 10px;
}
textarea { width: 100%; min-height: 80px; }
button, .btn {
  background: #3a7afe;
  border-color: #3a7afe;
  color: #fff;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .btn:hover { background: #2a63e0; }
.btn.secondary { background: #262a33; border-color: #333844; }
.btn.danger { background: #d9534f; border-color: #d9534f; }
form.inline { display: inline; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; align-items: end; }
.form-grid label { display: block; font-size: 12px; color: #9aa1ad; margin-bottom: 4px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.badge.ok { background: #1e3a2a; color: #6fd68b; }
.badge.off { background: #3a1e1e; color: #d68b8b; }
.error { color: #ff8080; margin-bottom: 12px; }
.login-box { max-width: 340px; margin: 80px auto; }