:root {
  --primary: #1e72b8;
  --primary-dark: #155a94;
  --bg: #f4f8fc;
  --card: #ffffff;
  --text: #1e72b8;
  --muted: #6b8fb0;
  --danger: #e0442d;
  --ok: #61bd6d;
  --border: #d7e6f3;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.hidden { display: none !important; }

.shell { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 20px; }
.brand img { height: 36px; }

.layout { display: flex; flex: 1; min-height: 0; }

.sidebar {
  width: 240px;
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 20px 12px;
}

.nav-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 12px 14px;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 6px;
  font-size: 14px;
}

.nav-item.active, .nav-item:hover {
  background: rgba(30, 114, 184, 0.12);
  color: var(--primary-dark);
}

.content { flex: 1; padding: 24px; overflow: auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }

.stat {
  background: linear-gradient(180deg, #fff, #f8fbff);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; }
.stat .value { font-size: 28px; font-weight: 700; margin-top: 8px; }

h1 { font-size: 24px; margin-bottom: 8px; }
h2 { font-size: 18px; margin-bottom: 12px; }
.sub { color: var(--muted); margin-bottom: 20px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }

label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
}

textarea { min-height: 90px; resize: vertical; }

.btn {
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
}

.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}

.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: rgba(30,114,184,.1);
  color: var(--primary-dark);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
}

.badge-online { color: var(--ok); font-weight: 700; }
.badge-offline { color: var(--muted); }

@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; display: flex; overflow-x: auto; gap: 8px; }
  .nav-item { white-space: nowrap; margin: 0; }
}