:root {
  /* App theme tokens */
  --app-bg: #f3f6fb;
  --app-surface: #ffffff;
  --app-surface-2: #f8fafc;
  --app-text: #0f172a;
  --app-muted: #64748b;
  --app-border: rgba(15, 23, 42, 0.12);
  --app-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --app-shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.08);
  --app-radius: 16px;
  --app-radius-sm: 12px;
  --app-focus: rgba(37, 99, 235, 0.35);
  --app-primary: #2563eb;
  --app-primary-2: #1d4ed8;
  --app-success: #16a34a;
  --app-warning: #f59e0b;
  --app-danger: #ef4444;
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  margin-bottom: 72px;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(37, 99, 235, 0.10), transparent 60%),
              radial-gradient(1000px 500px at 90% 0%, rgba(99, 102, 241, 0.08), transparent 55%),
              var(--app-bg);
  color: var(--app-text);
}

/* Top navigation */
.app-navbar {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--app-border);
}

.app-navbar .navbar-brand {
  font-weight: 700;
  letter-spacing: 0.2px;
}

.app-navbar .nav-link {
  color: rgba(15, 23, 42, 0.80) !important;
  font-weight: 600;
}

.app-navbar .nav-link:hover {
  color: var(--app-text) !important;
}

/* Page header */
.page-header {
  padding: 0.25rem 0;
}

.page-header .page-title {
  font-weight: 800;
  letter-spacing: -0.2px;
}

.page-header .page-subtitle {
  color: var(--app-muted);
}

/* Cards / surfaces */
.card {
  border: 1px solid var(--app-border);
  border-radius: var(--app-radius);
  background: var(--app-surface);
}

.card.shadow-sm {
  box-shadow: var(--app-shadow-sm);
}

.app-card {
  box-shadow: var(--app-shadow);
}

/* Form styling */
.form-label {
  font-weight: 700;
  color: rgba(15, 23, 42, 0.86);
}

.form-control,
.form-select {
  border-color: rgba(15, 23, 42, 0.16);
  border-radius: 12px;
  background: var(--app-surface);
}

.form-control::placeholder {
  color: rgba(100, 116, 139, 0.9);
}

.form-text {
  color: rgba(100, 116, 139, 0.95);
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  box-shadow: 0 0 0 0.15rem rgba(255, 255, 255, 0.85), 0 0 0 0.35rem var(--app-focus);
}

.btn-primary {
  border: 0;
  background: linear-gradient(180deg, var(--app-primary), var(--app-primary-2));
  box-shadow: 0 10px 18px rgba(37, 99, 235, 0.18);
}

.btn-primary:hover {
  filter: brightness(0.98);
}

.btn-outline-secondary {
  border-color: rgba(15, 23, 42, 0.18);
}

.required-mark {
  color: var(--app-danger);
  font-weight: 900;
  margin-left: 0.25rem;
}

/* Search result popovers (list-group under inputs) */
.search-results {
  border: 1px solid rgba(15, 23, 42, 0.16);
  border-radius: var(--app-radius-sm);
  background: var(--app-surface);
  box-shadow: var(--app-shadow-sm);
  overflow: hidden;
  max-height: 280px;
  overflow-y: auto;
}

.search-results .list-group-item {
  border-color: rgba(15, 23, 42, 0.08);
  padding: 0.65rem 0.85rem;
}

.search-results .list-group-item:hover,
.search-results .list-group-item:focus {
  background: rgba(37, 99, 235, 0.06);
}

/* Footer */
.footer {
  background: transparent;
}

/* Keep default floating behavior intact */
.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
  text-align: start;
}