:root {
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-border-strong: #d1d5db;
  --color-text: #111827;
  --color-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --color-info: #0284c7;
  --color-row-hover: #f9fafb;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --radius: 8px;
}

* { box-sizing: border-box; }
html, body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  margin: 0;
  padding: 0;
}

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

/* ---------- Header ---------- */
.app-header {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
  box-shadow: var(--shadow-sm);
}
.app-header .brand {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text);
  margin-right: 32px;
}
.app-header .brand:hover { text-decoration: none; }
.app-header .nav-links a {
  color: var(--color-muted);
  margin-right: 18px;
  font-weight: 500;
  font-size: 0.9rem;
}
.app-header .nav-links a:hover { color: var(--color-text); text-decoration: none; }
.app-header .user-area { display: flex; align-items: center; gap: 12px; }
.app-header .welcome { color: var(--color-muted); font-size: 0.9rem; }

/* ---------- Layout ---------- */
.app-main { padding: 32px 0 64px; min-height: calc(100vh - 130px); }
.app-footer {
  border-top: 1px solid var(--color-border);
  background: #fafafa;
  color: var(--color-muted);
  font-size: 0.85rem;
  padding: 18px 0;
}

h1, h2, h3, h4 { color: var(--color-text); font-weight: 600; }
h2 { font-size: 1.5rem; margin-bottom: 0.25rem; }
.page-subtitle { color: var(--color-muted); margin-bottom: 24px; font-size: 0.95rem; }

/* ---------- Cards / dashboard ---------- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.dash-section-title {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 24px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
}
.dash-section-title:first-of-type { margin-top: 8px; }
.dash-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  text-decoration: none;
  color: var(--color-text);
  transition: border-color .15s, box-shadow .15s, transform .05s;
  box-shadow: var(--shadow-sm);
}
.dash-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: var(--color-text);
}
.dash-card .title { font-weight: 600; font-size: 1rem; margin-bottom: 4px; display: block; }
.dash-card .desc { color: var(--color-muted); font-size: 0.875rem; }

.section-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.section-card h3 { font-size: 1.1rem; margin-top: 0; margin-bottom: 16px; }

/* ---------- Forms / buttons ---------- */
.form-label { font-weight: 500; font-size: 0.875rem; color: var(--color-text); }
.form-control, .form-select {
  border: 1px solid var(--color-border-strong);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.95rem;
  background: #fff;
}
.form-control:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  outline: none;
}
.btn { border-radius: 6px; font-weight: 500; padding: 7px 14px; font-size: 0.9rem; }
.btn-primary {
  background: var(--color-primary); border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-secondary { background: #f3f4f6; border-color: var(--color-border-strong); color: var(--color-text); }
.btn-secondary:hover { background: #e5e7eb; color: var(--color-text); }
.btn-outline-secondary { color: var(--color-text); border-color: var(--color-border-strong); }
.btn-outline-secondary:hover { background: #f3f4f6; color: var(--color-text); border-color: var(--color-border-strong); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); }

/* ---------- Tables ---------- */
.table {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.9rem;
}
.table thead th {
  background: #f9fafb;
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}
.table tbody tr { transition: background-color .1s; }
.table tbody tr:hover { background: var(--color-row-hover); }
.table td, .table th { padding: 10px 12px; vertical-align: middle; }

.empty-state {
  padding: 32px;
  text-align: center;
  color: var(--color-muted);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

/* ---------- Status badges ---------- */
.badge-status { font-size: 0.75rem; padding: 3px 8px; border-radius: 12px; font-weight: 500; }
.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-error   { background: #fee2e2; color: #991b1b; }
.badge-info    { background: #dbeafe; color: #1e40af; }
.badge-muted   { background: #f3f4f6; color: var(--color-muted); }

/* ---------- Alerts ---------- */
.alert { border-radius: 6px; border: 1px solid transparent; font-size: 0.9rem; }
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.alert-info    { background: #eff6ff; border-color: #bfdbfe; color: #1e40af; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-danger  { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* ---------- Code / mono ---------- */
code, .mono {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  background: #f3f4f6;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: #374151;
}

/* ---------- Login ---------- */
.login-card {
  max-width: 380px;
  margin: 64px auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.login-card h2 { margin-bottom: 4px; }
.login-card .subtitle { color: var(--color-muted); margin-bottom: 24px; font-size: 0.9rem; }
.login-extra {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.9rem;
}

/* ---------- eAdaptor mode cards (mutually exclusive) ---------- */
.mode-card {
  display: block;
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: #fff;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: border-color .15s, box-shadow .15s, background-color .15s, transform .05s;
  margin: 0;
}
.mode-card:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}
.mode-card .mode-title { font-weight: 600; font-size: 1rem; color: var(--color-text); }
.mode-card .mode-desc  { color: var(--color-muted); font-size: 0.875rem; margin-top: 2px; }
.mode-card-active {
  border-color: var(--color-primary);
  background: #eff6ff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  cursor: default;
}
.mode-card-active[disabled] { opacity: 1; }
.mode-card-inactive {
  opacity: 0.85;
  cursor: pointer;
}
.mode-card-inactive:hover {
  border-color: var(--color-primary);
  opacity: 1;
  background: #f8fafc;
}
.mode-card-inactive:active { transform: translateY(1px); }
.section-divider {
  font-size: 0.95rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  margin-top: 8px;
}

/* ---------- eAdaptor: active banner + tabs + activate toggle ---------- */
.active-banner {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  border-radius: var(--radius);
  padding: 10px 16px;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-tabs-custom {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--color-border);
}
.nav-tabs-custom li { margin: 0; }
.nav-tabs-custom a {
  display: inline-block;
  padding: 10px 18px;
  background: #f9fafb;
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  color: var(--color-muted);
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  margin-bottom: -1px;
}
.nav-tabs-custom a:hover {
  background: #f3f4f6;
  color: var(--color-text);
  text-decoration: none;
}
.nav-tabs-custom a.active {
  background: #fff;
  color: var(--color-text);
  border-bottom: 1px solid #fff;
  font-weight: 600;
}
.active-toggle {
  background: #fefce8;
  border: 1px solid #fef08a;
  border-radius: 6px;
}

/* ---------- Pagination ---------- */
.pagination .btn.disabled { pointer-events: none; opacity: 0.5; }

/* ---------- Print: hide screen-only chrome by default ---------- */
.print-only { display: none; }

/* ---------- Print stylesheet (Help guide -> PDF) ---------- */
@media print {
  /* Use a serif body for printed pages (more book-like). */
  html, body {
    background: #fff !important;
    color: #000 !important;
    font-family: Georgia, "Times New Roman", "Liberation Serif", serif !important;
    font-size: 10.5pt;
    line-height: 1.45;
  }
  /* Hide the top nav, footer, dashboard chrome and any screen-only blocks. */
  .app-header, .app-footer, .nav-tabs-custom, .alert, .btn,
  #help-search, #help-no-results,
  .screen-only,
  form, input, select, textarea,
  .dash-section-title, .dashboard-grid, .active-banner, .active-toggle,
  .empty-state {
    display: none !important;
  }
  .app-main { padding: 0 !important; }
  .container { max-width: none !important; padding: 0 !important; }
  main, .app-main { min-height: 0 !important; }

  /* Cover page (only visible when printing). */
  .print-only { display: block; }
  .print-cover {
    page-break-after: always;
    text-align: center;
    padding-top: 25%;
    padding-bottom: 10%;
  }
  .print-cover-brand {
    font-size: 12pt;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: #444;
    margin-bottom: 24px;
  }
  .print-cover-title {
    font-size: 30pt;
    font-weight: 700;
    margin: 16px 0 24px;
    color: #000;
  }
  .print-cover-meta {
    font-size: 10.5pt;
    color: #555;
    font-style: italic;
    margin-bottom: 60px;
  }
  .print-cover-foot {
    margin-top: 200px;
    font-size: 9pt;
    color: #777;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  /* Each topic becomes a clean, framed block. */
  .help-card {
    background: #fff !important;
    border: 1px solid #999 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 14px 18px !important;
    margin: 0 0 16px !important;
    page-break-inside: avoid;
  }
  .help-card h3 {
    font-size: 14pt;
    color: #000 !important;
    margin: 0 0 8px;
    padding-bottom: 6px;
    border-bottom: 1.5px solid #333;
  }
  .help-card h4 {
    font-size: 11pt;
    margin-top: 12px;
    color: #222;
  }
  .help-card p, .help-card li { color: #000 !important; }
  .help-card ul, .help-card ol { padding-left: 22px; }
  .help-card a { color: #000 !important; text-decoration: none; }
  .help-card a:after { content: ""; }

  code, .mono {
    font-family: "Courier New", "DejaVu Sans Mono", monospace !important;
    background: #f0f0f0 !important;
    color: #000 !important;
    padding: 1px 4px;
    border: 1px solid #ddd;
    border-radius: 2px;
  }
  pre.mono {
    background: #fafafa !important;
    border: 1px solid #bbb !important;
    padding: 10px !important;
    page-break-inside: avoid;
    white-space: pre-wrap;
  }

  /* Page setup: 1-inch margins, footer with page numbers. */
  @page {
    size: A4;
    margin: 22mm 18mm 22mm 18mm;
    @bottom-center {
      content: "Page " counter(page) " of " counter(pages);
      font-family: Georgia, serif;
      font-size: 9pt;
      color: #666;
    }
    @top-right {
      content: "Help & Configuration Guide";
      font-family: Georgia, serif;
      font-size: 9pt;
      color: #666;
    }
  }

  /* Avoid orphans/widows where possible. */
  h2, h3, h4 { page-break-after: avoid; }
  p, li { orphans: 3; widows: 3; }
}

/* ---------- Toast / spinner ---------- */
.spinner-inline {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid #cbd5e1;
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: -2px;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }