:root {
  --bg: #0c1020;
  --side: #12182b;
  --card: #171e34;
  --line: #2a3454;
  --text: #e8edf8;
  --muted: #93a0c0;
  --accent: #3ec6ff;
  --accent-2: #1aa3e0;
  --danger: #ff6b6b;
  --ok: #3dd68c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
.shell { display: flex; min-height: 100vh; }
.side {
  width: 240px;
  background: var(--side);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  padding: 22px 16px;
}
.brand { padding: 6px 10px 22px; }
.brand strong { display: block; letter-spacing: 0.08em; font-size: 18px; }
.brand span { color: var(--muted); font-size: 12px; }
.side nav { display: flex; flex-direction: column; gap: 6px; }
.side nav a {
  color: var(--text);
  text-decoration: none;
  padding: 11px 12px;
  border-radius: 10px;
}
.side nav a.active, .side nav a:hover { background: #223056; }
.side-foot { margin-top: auto; }
.side-foot button, .btn, button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--accent);
  color: #04202c;
  font-weight: 700;
  cursor: pointer;
}
.side-foot button { width: 100%; background: transparent; color: var(--muted); border: 1px solid var(--line); }
.main { flex: 1; }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
}
.top h1 { margin: 0; font-size: 22px; }
.who { color: var(--muted); }
.content { padding: 24px 28px 40px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.card, .table-wrap, form.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.card span { display: block; color: var(--muted); font-size: 13px; }
.card strong { font-size: 28px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }
.badge { border-radius: 999px; padding: 3px 8px; font-size: 12px; }
.badge.on { background: rgba(61, 214, 140, 0.15); color: var(--ok); }
.badge.off { background: rgba(255, 107, 107, 0.12); color: #ffb4b4; }
label { display: block; margin: 12px 0 6px; color: var(--muted); font-size: 13px; }
input, select {
  width: 100%;
  background: #0e1426;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.btn.ghost, button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn.danger, button.danger { background: var(--danger); color: white; }
.flash { background: #16324a; border: 1px solid #2d6f96; padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; }
.login-wrap { min-height: 100vh; display: grid; place-items: center; }
.login-card { width: 380px; }
.help { color: var(--muted); font-size: 13px; line-height: 1.5; }
.actions { display: flex; gap: 8px; }
@media (max-width: 900px) {
  .shell { display: block; }
  .side { width: auto; }
  .grid { grid-template-columns: 1fr; }
}