:root {
  --navy: #10233e;
  --navy-light: #16304f;
  --accent: #2f6fed;
  --accent-light: #eaf1ff;
  --green: #1a9e6d;
  --red: #d64545;
  --amber: #d69a1a;
  --gray-50: #f7f8fa;
  --gray-100: #eef0f3;
  --gray-300: #d3d8de;
  --gray-500: #8a94a3;
  --gray-700: #4a5568;
  --gray-900: #1a202c;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16,35,62,0.08), 0 1px 2px rgba(16,35,62,0.06);
  font-size: 15px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
}

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

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

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--navy);
  color: #cfd8e6;
  display: flex;
  flex-direction: column;
}
.sidebar .brand {
  padding: 20px 22px;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar .brand span { color: var(--accent); }
.sidebar nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar .nav-section-label {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: .06em;
  color: #6f7f97; padding: 14px 22px 6px;
}
.sidebar a.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 22px; color: #cfd8e6; font-size: 0.92rem;
  border-left: 3px solid transparent;
}
.sidebar a.nav-link:hover { background: var(--navy-light); text-decoration: none; }
.sidebar a.nav-link.active {
  background: var(--navy-light); border-left-color: var(--accent); color: #fff; font-weight: 600;
}

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

.topbar {
  height: 60px; background: #fff; border-bottom: 1px solid var(--gray-100);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
}
.topbar .user-chip { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; }
.topbar .role-badge {
  background: var(--accent-light); color: var(--accent); font-size: 0.72rem;
  padding: 2px 8px; border-radius: 20px; font-weight: 600;
}

.content { padding: 26px 28px; flex: 1; }

.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.page-header h1 { font-size: 1.4rem; margin: 0; }
.page-header .subtitle { color: var(--gray-500); font-size: 0.88rem; margin-top: 2px; }

/* ---------- Components ---------- */
.card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
@media (max-width: 900px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }

.stat-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px 20px;
}
.stat-card .label { font-size: 0.8rem; color: var(--gray-500); margin-bottom: 6px; }
.stat-card .value { font-size: 1.5rem; font-weight: 700; }
.stat-card .delta { font-size: 0.78rem; margin-top: 4px; }
.stat-card .delta.up { color: var(--green); }
.stat-card .delta.down { color: var(--red); }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #fff; border: none;
  padding: 9px 16px; border-radius: 8px; font-size: 0.88rem; font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: #2559c7; text-decoration: none; color: #fff; }
.btn.secondary { background: #fff; color: var(--gray-900); border: 1px solid var(--gray-300); }
.btn.secondary:hover { background: var(--gray-100); }
.btn.danger { background: var(--red); }
.btn.small { padding: 5px 10px; font-size: 0.78rem; }

table.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.data-table th {
  text-align: left; font-size: 0.76rem; text-transform: uppercase; letter-spacing: .03em;
  color: var(--gray-500); border-bottom: 1px solid var(--gray-100); padding: 10px 12px;
}
table.data-table td { padding: 11px 12px; border-bottom: 1px solid var(--gray-100); }
table.data-table tr:hover td { background: var(--gray-50); }

.badge { padding: 3px 9px; border-radius: 20px; font-size: 0.74rem; font-weight: 600; }
.badge.green { background: #e5f7ef; color: var(--green); }
.badge.red { background: #fbeaea; color: var(--red); }
.badge.amber { background: #fbf3e2; color: var(--amber); }
.badge.gray { background: var(--gray-100); color: var(--gray-700); }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--gray-300); border-radius: 8px; font-size: 0.9rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.88rem; }
.alert.error { background: #fbeaea; color: #a83b3b; }
.alert.success { background: #e5f7ef; color: #147a52; }

.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, #1b3a63 100%);
}
.login-card {
  background: #fff; border-radius: 14px; padding: 40px; width: 380px; box-shadow: var(--shadow);
}
.login-card h1 { font-size: 1.3rem; margin: 0 0 4px; }
.login-card .sub { color: var(--gray-500); font-size: 0.85rem; margin-bottom: 24px; }