* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: #f4f4f2;
  color: #1a1a1a;
}
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  background: #1f2937;
  color: #fff;
  padding: 1.5rem 0.75rem;
  flex-shrink: 0;
}
.sidebar h2 { font-size: 15px; font-weight: 600; padding: 0 0.5rem 1rem; margin: 0; }
.sidebar a {
  display: block;
  color: #d1d5db;
  text-decoration: none;
  padding: 9px 10px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 2px;
}
.sidebar a:hover, .sidebar a.active { background: #374151; color: #fff; }
.sidebar .user-box { border-top: 1px solid #374151; margin-top: 1rem; padding-top: 1rem; font-size: 13px; color: #9ca3af; }
.sidebar .user-box a { color: #f87171; padding: 6px 10px; }

.main { flex: 1; padding: 2rem; max-width: 1100px; }
.main h1 { font-size: 20px; font-weight: 600; margin: 0 0 1.5rem; }

.card { background: #fff; border-radius: 10px; padding: 1.25rem 1.5rem; border: 1px solid #e5e5e2; margin-bottom: 1.25rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.grid-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }

.metric { background: #fff; border-radius: 10px; padding: 1rem 1.25rem; border: 1px solid #e5e5e2; }
.metric .label { font-size: 12.5px; color: #6b7280; margin-bottom: 4px; }
.metric .value { font-size: 24px; font-weight: 600; }

label { display: block; font-size: 13px; color: #4b5563; margin-bottom: 4px; }
input, select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 1rem;
  background: #fff;
}
input:disabled { background: #f3f4f6; color: #6b7280; }

button, .btn {
  background: #1f2937;
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}
button:hover { background: #111827; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; color: #6b7280; font-weight: 500; padding: 8px 6px; border-bottom: 1px solid #e5e5e2; }
td { padding: 8px 6px; border-bottom: 1px solid #f0f0ee; }

.badge { font-size: 12px; padding: 3px 10px; border-radius: 5px; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }

.alert { padding: 10px 14px; border-radius: 6px; font-size: 13.5px; margin-bottom: 1rem; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }

.login-box { max-width: 360px; margin: 8vh auto; }