:root {
  --brand-primary: #1e3a5f;
  --brand-primary-dark: #14283f;
  --brand-accent: #2f6fed;
  --sidebar-width: 260px;
  --navbar-height: 62px;
}

body {
  background-color: #f4f6f9;
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  color: #2b3648;
}

/* ---------------------------- Login page ---------------------------- */

.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-dark) 55%, #0c1a2b 100%);
  padding: 1.5rem;
}

.login-wrapper {
  width: 100%;
  max-width: 440px;
}

.login-card {
  border-radius: 1.25rem;
}

.brand-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto;
  border-radius: 1rem;
  background: linear-gradient(135deg, var(--brand-accent), var(--brand-primary));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 4px 12px rgba(47,111,237,.3);
}

.avatar-circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #e8f0fe;
  color: var(--brand-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

/* ---------------------------- Navbar ---------------------------- */

.app-header {
  height: var(--navbar-height);
  z-index: 1040;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

/* ---------------------------- Sidebar ---------------------------- */

.app-sidebar {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: #ffffff;
  border-right: 1px solid #e5e9f0;
  overflow-y: auto;
  z-index: 1030;
  transition: transform .25s ease;
}

.nav-section-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8b98a9;
  padding: 0.5rem 0.75rem 0.25rem;
}

.app-sidebar .nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  color: #4a5568;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: 0.5rem;
  transition: all 0.15s ease;
  margin-bottom: 2px;
}

.app-sidebar .nav-link:hover {
  background: #f0f4fa;
  color: var(--brand-accent);
}

.app-sidebar .nav-link.active {
  background: #e8f0fe;
  color: var(--brand-accent);
  font-weight: 600;
}

.app-sidebar .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 0.95rem;
  color: #718096;
}

.app-sidebar .nav-link.active .nav-icon {
  color: var(--brand-accent);
}

.collapse-arrow {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.nav-collapse.collapsed .collapse-arrow {
  transform: rotate(-90deg);
}

.sub-nav {
  padding-left: 0.5rem;
  border-left: 2px solid #edf2f7;
  margin-left: 1.1rem;
  margin-top: 0.2rem;
  margin-bottom: 0.3rem;
}

.sub-nav .nav-link {
  font-size: 0.86rem;
  padding: 0.45rem 0.75rem;
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 1025;
}

@media (max-width: 991.98px) {
  .app-sidebar { transform: translateX(-100%); }
  .app-sidebar.open { transform: translateX(0); box-shadow: 4px 0 20px rgba(0,0,0,.25); }
  .sidebar-backdrop.show { display: block; }
  .app-main { margin-left: 0 !important; }
}

/* ---------------------------- Main content ---------------------------- */

.app-main {
  margin-left: var(--sidebar-width);
  margin-top: var(--navbar-height);
  min-height: calc(100vh - var(--navbar-height));
}

.page-title {
  font-weight: 700;
  color: #1a202c;
  letter-spacing: -0.01em;
}

.stat-card {
  border: none;
  border-radius: 0.85rem;
  color: #fff;
  overflow: hidden;
  position: relative;
  box-shadow: 0 4px 12px rgba(0,0,0,.08);
}
.stat-card .stat-icon {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.8rem;
  opacity: .25;
}
.stat-card.bg-primary-grad { background: linear-gradient(135deg, #2f6fed 0%, #1e3a5f 100%); }
.stat-card.bg-success-grad { background: linear-gradient(135deg, #16a34a 0%, #0f6b34 100%); }
.stat-card.bg-warning-grad { background: linear-gradient(135deg, #f59e0b 0%, #b45309 100%); }
.stat-card.bg-danger-grad  { background: linear-gradient(135deg, #ef4444 0%, #991b1b 100%); }
.stat-card.bg-info-grad    { background: linear-gradient(135deg, #06b6d4 0%, #0e7490 100%); }

.stat-card .stat-value { font-size: 1.65rem; font-weight: 700; line-height: 1.2; margin-top: 0.2rem; }
.stat-card .stat-label { font-size: 0.82rem; opacity: .9; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card .stat-sub   { font-size: 0.76rem; opacity: .8; margin-top: 0.35rem; }

.card {
  border: none;
  border-radius: 0.85rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 2px 6px rgba(0,0,0,.04);
}
.card-header {
  background: #fff;
  border-bottom: 1px solid #edf2f7;
  font-weight: 600;
  border-radius: 0.85rem 0.85rem 0 0 !important;
}

.table thead th {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #718096;
  font-weight: 600;
  border-bottom-width: 1px;
  white-space: nowrap;
}
.table td { vertical-align: middle; }

.table-warning-subtle { background-color: #fff9f0 !important; }
.table-warning-subtle:hover { background-color: #fff3e0 !important; }

.badge-status { font-size: 0.72rem; padding: 0.4em 0.65em; border-radius: 0.4rem; }

.btn-icon {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: 0.4rem;
}

.btn-xs {
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  border-radius: 0.35rem;
}

.empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  color: #8b98a9;
}
.empty-state i { font-size: 2.6rem; margin-bottom: 0.75rem; display: block; }

/* ---------------------------- Print Styling ---------------------------- */

@media print {
  body { background: #fff !important; color: #000 !important; }
  .app-header, .app-sidebar, .sidebar-backdrop, .d-print-none, .btn { display: none !important; }
  .app-main { margin: 0 !important; }
  .card { box-shadow: none !important; border: 1px solid #ccc !important; }
  .printable-doc { border: none !important; padding: 0 !important; }
}