:root {
  --brand: #0d6efd;
  --muted: #6c757d;
}
body {
  background: linear-gradient(180deg, #f8fafc, white);
  font-family:
    Inter,
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    "Helvetica Neue",
    Arial;
}
.card {
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(13, 110, 253, 0.08);
}
.navbar-brand {
  font-weight: 700;
}
.lead {
  color: var(--muted);
}
.btn-primary {
  background: var(--brand);
  border-color: var(--brand);
}
.container {
  max-width: 960px;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.fade-in-up {
  animation: fadeInUp 420ms ease both;
}
.card:hover {
  transform: translateY(-6px);
  transition:
    transform 220ms ease,
    box-shadow 220ms ease;
}
.btn {
  transition:
    transform 140ms ease,
    box-shadow 140ms ease;
}
.btn:active {
  transform: translateY(1px);
}
.alert {
  transition: opacity 300ms ease;
}
.header-image {
 height: 60px !important;
 width: auto;
}

/* Spinner overlay */
.spinner-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.6);
  z-index: 1050;
  display: none;
}
.spinner {
  width: 56px;
  height: 56px;
  border: 6px solid rgba(0, 0, 0, 0.08);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 3000ms linear infinite;
  margin: 15% auto;

}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}