:root {
  --bg: #0f172a;
  --card: #1e293b;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #0ea5e9;
  --ok: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--text); }
a { color: #7dd3fc; text-decoration: none; }
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px; background: #0b1220; border-right: 1px solid var(--line);
  padding: 16px 12px; display: flex; flex-direction: column; gap: 8px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; padding: 8px 10px 16px; }
.brand img { height: 28px; border-radius: 6px; }
.sidebar nav a {
  display: flex; gap: 10px; align-items: center; padding: 10px 12px; border-radius: 10px; color: var(--text);
}
.sidebar nav a:hover, .sidebar nav a.active { background: var(--card); }
.side-foot { margin-top: auto; color: var(--muted); font-size: .85rem; padding: 12px; }
.main { flex: 1; display: flex; flex-direction: column; }
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 20px; border-bottom: 1px solid var(--line); background: rgba(15,23,42,.9);
}
.topbar h1 { margin: 0; font-size: 1.15rem; }
.content { padding: 18px 20px 40px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; margin-bottom: 14px;
}
.card h2, .card h3 { margin-top: 0; }
.flash { padding: 10px 12px; border-radius: 10px; margin-bottom: 12px; }
.flash.ok { background: #064e3b; color: #a7f3d0; }
.flash.err { background: #7f1d1d; color: #fecaca; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; border: 0; border-radius: 10px;
  padding: 10px 14px; background: var(--accent); color: #fff; font-weight: 700; cursor: pointer; font: inherit;
}
.btn.secondary { background: #475569; }
.btn.ok { background: var(--ok); }
.btn.warn { background: var(--warn); color: #111; }
.btn.danger { background: var(--danger); }
.btn.sm { padding: 6px 10px; font-size: .85rem; }
input, select, textarea {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: #0f172a; color: var(--text); font: inherit; margin: 4px 0 10px;
}
label { font-size: .82rem; color: var(--muted); }
.form-row { margin-bottom: 4px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; font-size: .92rem; }
.muted { color: var(--muted); }
.badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px; color: #fff; font-size: .78rem; font-weight: 700;
}
.badge.success { background: var(--ok); }
.badge.warning { background: var(--warn); color: #111; }
.badge.danger { background: var(--danger); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 14px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.stat .n { font-size: 1.6rem; font-weight: 800; }
.rack { display: grid; gap: 16px; }
.region-block h3 { margin: 0 0 10px; }
.beds {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px;
}
.bed {
  border: 1px solid var(--line); border-radius: 12px; padding: 12px 10px; text-align: center;
  cursor: pointer; background: #0f172a; transition: .15s;
}
.bed:hover { transform: translateY(-1px); }
.bed.success { border-color: #166534; background: #052e16; }
.bed.warning { border-color: #a16207; background: #422006; }
.bed.danger { border-color: #991b1b; background: #450a0a; }
.bed .code { font-weight: 800; font-size: 1.05rem; }
.bed .st { font-size: .78rem; margin-top: 4px; opacity: .9; }
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { width: min(420px, 100%); }
@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; }
  .stats { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}