:root {
  --ubb-navy: #00274d;
  --ubb-navy-dark: #001a33;
  --ubb-gold: #c9a227;
  --ubb-gold-light: #e6c866;
  --ubb-bg: #f4f6f9;
  --ubb-text: #1c2733;
}

body {
  background-color: var(--ubb-bg);
  color: var(--ubb-text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main.app-main {
  flex: 1 0 auto;
  padding-top: 1.75rem;
  padding-bottom: 3rem;
}

/* --- Navbar --- */
.navbar-ubb {
  background: linear-gradient(90deg, var(--ubb-navy) 0%, var(--ubb-navy-dark) 100%);
  border-bottom: 3px solid var(--ubb-gold);
}

.navbar-ubb .navbar-brand {
  font-weight: 700;
  color: #fff !important;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  letter-spacing: 0.3px;
}

.navbar-ubb .brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--ubb-gold);
  color: var(--ubb-navy-dark);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.navbar-ubb .nav-link {
  color: rgba(255, 255, 255, 0.85) !important;
  font-weight: 500;
}

.navbar-ubb .nav-link.active,
.navbar-ubb .nav-link:hover {
  color: var(--ubb-gold-light) !important;
}

.navbar-ubb .navbar-text {
  color: rgba(255, 255, 255, 0.75) !important;
  font-size: 0.9rem;
}

/* --- Page header strip --- */
.page-header {
  border-left: 5px solid var(--ubb-gold);
  padding-left: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ubb-navy);
  margin-bottom: 0.15rem;
}

.page-header .subtitle {
  color: #64748b;
  font-size: 0.92rem;
}

/* --- Cards / tables --- */
.card {
  border: none;
  border-radius: 0.6rem;
  box-shadow: 0 1px 4px rgba(0, 39, 77, 0.08);
}

.card-header {
  background-color: #fff;
  border-bottom: 2px solid var(--ubb-bg);
  font-weight: 600;
  color: var(--ubb-navy);
}

.table thead th {
  background-color: var(--ubb-navy);
  color: #fff;
  font-weight: 600;
  border: none;
  white-space: nowrap;
}

.table-hover tbody tr:hover {
  background-color: #eef3f8;
}

.badge-cod {
  background-color: var(--ubb-gold);
  color: var(--ubb-navy-dark);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

/* --- Buttons --- */
.btn-ubb {
  background-color: var(--ubb-navy);
  border-color: var(--ubb-navy);
  color: #fff;
}
.btn-ubb:hover {
  background-color: var(--ubb-navy-dark);
  border-color: var(--ubb-navy-dark);
  color: #fff;
}

.btn-gold {
  background-color: var(--ubb-gold);
  border-color: var(--ubb-gold);
  color: var(--ubb-navy-dark);
  font-weight: 600;
}
.btn-gold:hover {
  background-color: var(--ubb-gold-light);
  border-color: var(--ubb-gold-light);
  color: var(--ubb-navy-dark);
}

/* --- Stat tiles --- */
.stat-tile {
  border-radius: 0.6rem;
  padding: 1.1rem 1.3rem;
  background: #fff;
  box-shadow: 0 1px 4px rgba(0, 39, 77, 0.08);
  border-top: 4px solid var(--ubb-gold);
}
.stat-tile .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ubb-navy);
}
.stat-tile .stat-label {
  color: #64748b;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* --- Login page --- */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top left, var(--ubb-navy) 0%, var(--ubb-navy-dark) 60%);
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  border-radius: 0.8rem;
  overflow: hidden;
}

.login-card .card-top {
  background: var(--ubb-navy-dark);
  padding: 1.75rem 1.5rem 1.25rem;
  text-align: center;
  color: #fff;
}

.login-card .card-top .brand-mark {
  width: 56px;
  height: 56px;
  margin: 0 auto 0.6rem;
  border-radius: 50%;
  background: var(--ubb-gold);
  color: var(--ubb-navy-dark);
  font-weight: 800;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

footer.app-footer {
  background: var(--ubb-navy-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 1rem 0;
  font-size: 0.85rem;
  text-align: center;
}

/* Accessibility: visible focus ring */
a:focus, button:focus, input:focus, select:focus, textarea:focus {
  outline: 3px solid var(--ubb-gold) !important;
  outline-offset: 1px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ubb-gold);
  color: var(--ubb-navy-dark);
  padding: 0.5rem 1rem;
  z-index: 2000;
}
.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

@media (max-width: 576px) {
  .stat-tile .stat-value { font-size: 1.3rem; }
}