:root {
  --color-primary:    #2563eb;
  --color-primary-dk: #1d4ed8;
  --color-success:    #16a34a;
  --color-warning:    #d97706;
  --color-danger:     #dc2626;
  --color-info:       #0891b2;

  --color-bg:         #f8fafc;
  --color-surface:    #ffffff;
  --color-border:     #e2e8f0;
  --color-text:       #0f172a;
  --color-text-muted: #64748b;
  --color-nav-bg:     #1e293b;
  --color-nav-text:   #cbd5e1;
  --color-nav-active: #ffffff;

  --radius:   6px;
  --shadow:   0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
}

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

button {
  cursor: pointer;
  font: inherit;
  border: none;
  border-radius: var(--radius);
  padding: .45rem .9rem;
  font-size: .875rem;
  transition: background .15s, opacity .15s;
}
button:disabled { opacity: .55; cursor: not-allowed; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-dk); }

.btn-secondary {
  background: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover:not(:disabled) { background: #cbd5e1; }

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: .3rem .6rem;
}
.btn-ghost:hover:not(:disabled) { background: #eff6ff; }

input, select, textarea {
  font: inherit;
  font-size: .9rem;
  width: 100%;
  padding: .45rem .7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}
textarea { resize: vertical; min-height: 80px; }

label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: .25rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.form-group { margin-bottom: 1rem; }
.form-row { display: flex; gap: .75rem; }
.form-row .form-group { flex: 1; }

/* On narrow screens, stack two-column form rows and let the page header wrap. */
@media (max-width: 640px) {
  .form-row { flex-direction: column; gap: 0; }
  .page-header { flex-wrap: wrap; gap: .5rem; }
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
th {
  text-align: left;
  padding: .6rem .8rem;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--color-text-muted);
  border-bottom: 2px solid var(--color-border);
  background: var(--color-bg);
}
td {
  padding: .65rem .8rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
tr:hover td { background: #f1f5f9; }
tr:last-child td { border-bottom: none; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.page-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
}

.badge {
  display: inline-block;
  padding: .15rem .55rem;
  font-size: .72rem;
  font-weight: 700;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.badge-pending  { background: #fef3c7; color: #92400e; }
.badge-paid     { background: #dcfce7; color: #166534; }
.badge-overdue  { background: #fee2e2; color: #991b1b; }
.badge-partial  { background: #dbeafe; color: #1e40af; }
.badge-waived   { background: #f1f5f9; color: #475569; }
.badge-active   { background: #dcfce7; color: #166534; }
.badge-inactive { background: #f1f5f9; color: #475569; }
.badge-open     { background: #dbeafe; color: #1e40af; }
.badge-in_progress { background: #fef3c7; color: #92400e; }
.badge-done     { background: #dcfce7; color: #166534; }
.badge-draft    { background: #f1f5f9; color: #475569; }
.badge-none     { background: #f1f5f9; color: #94a3b8; }
.badge-scheduled { background: #dbeafe; color: #1e40af; }
.badge-completed { background: #dcfce7; color: #166534; }
.badge-cancelled { background: #fee2e2; color: #991b1b; }
.badge-suspended { background: #fee2e2; color: #991b1b; }
.badge-archived  { background: #f1f5f9; color: #475569; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}
.empty-state p { font-size: 1rem; }

.search-bar {
  display: flex;
  gap: .5rem;
  margin-bottom: 1rem;
}
.search-bar input { max-width: 320px; }

dialog.modal {
  border: none;
  padding: 0;
  margin: auto;
}
dialog.modal::backdrop {
  background: rgba(0,0,0,.45);
}
.modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}
.modal-header h2 { font-size: 1.1rem; font-weight: 700; }
.modal-body { padding: 1.25rem; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: .5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--color-border);
}

.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  z-index: 200; /* fallback stacking for browsers without the Popover API */
  /* The container is a [popover="manual"] so it renders in the top layer,
     above <dialog> backdrops. Undo the UA popover styles (inset:0,
     margin:auto, border, padding, canvas background, fit-content sizing)
     so it keeps its bottom-right placement and transparent look. */
  top: auto;
  left: auto;
  width: auto;
  height: auto;
  margin: 0;
  border: 0;
  padding: 0;
  overflow: visible;
  background: transparent;
}
.toast {
  padding: .75rem 1.1rem;
  border-radius: var(--radius);
  color: #fff;
  font-size: .9rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slide-in .2s ease;
}
.toast-success { background: var(--color-success); }
.toast-error   { background: var(--color-danger); }
.toast-info    { background: var(--color-primary); }
.toast-warning { background: var(--color-warning); }

@keyframes slide-in {
  from { transform: translateX(120%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

.spinner {
  display: inline-block;
  width: 1.1em; height: 1.1em;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Print control ────────────────────────────────────────────────────────────
   Browser printing of application screens is disabled: screen views are live,
   unwatermarked, and leave no export record. The audited path is Reports →
   PDF, which stamps the exporter, the time, and a verifiable integrity hash,
   and records the export in the audit log. (This is a policy control, not a
   technical guarantee — determined users can still capture a screen.) */
@media print {
  body > * {
    display: none !important;
  }
  body::before {
    content: "Printing of application screens is disabled.\A\A Screen views are live and carry no export record. Please use Reports \2192 Download PDF instead: PDF exports are watermarked with the exporter and time, sealed with a verifiable integrity hash, and recorded in the audit log.\A\A \2014 Quorum";
    white-space: pre-wrap;
    display: block;
    font: 14px/1.6 system-ui, sans-serif;
    color: #333;
    padding: 3rem;
    max-width: 42rem;
  }
}

/* Screen-attribution watermark inside modals: <dialog>.showModal() renders in
   the browser top layer, above any z-index, so the viewport overlay cannot
   reach it — the dialog surface carries the same stamp itself. */
dialog.modal {
  background-image: var(--screen-watermark, none);
}