:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --sidebar-bg: #111827;
  --sidebar-text: #d1d5db;
  --sidebar-active: #2563eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 20px 0;
}

.sidebar .brand {
  padding: 0 20px 20px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 12px;
}

.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: var(--sidebar-text);
  font-size: 14px;
}

.sidebar nav a:hover {
  background: rgba(255,255,255,.06);
  text-decoration: none;
  color: #fff;
}

.sidebar nav a.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 600;
}

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar .who { font-size: 14px; color: var(--text-muted); }

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

h1.page-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 20px;
}

.panel-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 15px;
}

.panel-body { padding: 18px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.stat-card .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.stat-card .value {
  font-size: 22px;
  font-weight: 700;
  margin-top: 6px;
}

.stat-card .sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

table th, table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

table th {
  font-size: 12px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.table-wrap { overflow-x: auto; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: #dcfce7; color: #15803d; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-muted { background: #e5e7eb; color: #4b5563; }
.badge-danger { background: #fee2e2; color: #b91c1c; }

.text-muted { color: var(--text-muted); }

.empty-hint {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
}

/* --- Auth (login) layout --- */
.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #111827, #1e3a8a);
}

.auth-card {
  width: 360px;
  background: var(--panel);
  border-radius: 10px;
  padding: 32px 28px;
  box-shadow: 0 12px 32px rgba(0,0,0,.25);
}

.auth-card h1 {
  font-size: 20px;
  margin: 0 0 4px;
}

.auth-card .subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.form-group { margin-bottom: 14px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 6px;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-block { width: 100%; }

.alert {
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 14px;
}

.alert-danger { background: #fee2e2; color: #b91c1c; }

@media (max-width: 768px) {
  .sidebar { display: none; }
  .content { padding: 16px; }
}