/*
 * RMU Asset Register — Enterprise Design System v2
 * ─────────────────────────────────────────────────
 * Requires Bootstrap 5.3+ and Bootstrap Icons 1.11+
 * Load this AFTER bootstrap.min.css
 */

/* ══════════════════════════════════════════════════
   1. DESIGN TOKENS
   ══════════════════════════════════════════════════ */
:root {
  /* Brand */
  --rmu-navy:          #1e3a5f;
  --rmu-blue:          #2563eb;
  --rmu-blue-light:    #dbeafe;
  --rmu-blue-dark:     #1d4ed8;

  /* Sidebar */
  --sidebar-bg:        #0f1728;
  --sidebar-text:      #8892a7;
  --sidebar-text-dim:  #4b5568;
  --sidebar-hover-bg:  rgba(255,255,255,0.05);
  --sidebar-active-bg: rgba(37,99,235,0.18);
  --sidebar-active-fg: #60a5fa;
  --sidebar-border:    #2563eb;
  --sidebar-width:     260px;
  --sidebar-logo-h:    64px;

  /* Topnav */
  --topnav-h:          64px;
  --topnav-bg:         #ffffff;
  --topnav-border:     #e8edf2;
  --topnav-shadow:     0 1px 4px rgba(15,23,40,0.08);

  /* Page */
  --page-bg:           #f0f4f8;
  --card-bg:           #ffffff;
  --card-border:       #e8edf2;
  --card-radius:       12px;
  --card-shadow:       0 1px 4px rgba(15,23,40,0.06), 0 4px 12px rgba(15,23,40,0.04);
  --card-shadow-hover: 0 4px 12px rgba(15,23,40,0.10), 0 8px 24px rgba(15,23,40,0.06);

  /* Typography */
  --text-primary:   #0f1728;
  --text-secondary: #4b5568;
  --text-muted:     #8892a7;
  --text-label:     #6b7280;

  /* Status colours */
  --c-blue:   #2563eb;
  --c-green:  #059669;
  --c-amber:  #d97706;
  --c-red:    #dc2626;
  --c-purple: #7c3aed;
  --c-cyan:   #0891b2;
  --c-indigo: #4338ca;
  --c-slate:  #64748b;

  /* Radius */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-xl:  20px;

  /* Transitions */
  --t-fast:  150ms ease;
  --t-base:  250ms ease;
}

/* ══════════════════════════════════════════════════
   2. RESET & BASE
   ══════════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--page-bg);
  color: var(--text-primary);
  font-size: 0.9rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: var(--rmu-blue); }
a:hover { color: var(--rmu-blue-dark); }

/* ══════════════════════════════════════════════════
   3. LAYOUT SHELL
   ══════════════════════════════════════════════════ */
.rmu-layout {
  display: flex;
  min-height: 100vh;
}

.rmu-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--t-base);
}

/* ══════════════════════════════════════════════════
   4. SIDEBAR
   ══════════════════════════════════════════════════ */
.rmu-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  overflow-y: auto;
  transition: transform var(--t-base);
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.rmu-sidebar::-webkit-scrollbar { width: 4px; }
.rmu-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; }

/* Brand */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1.25rem;
  height: var(--sidebar-logo-h);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.sidebar-brand-logo {
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  background: var(--rmu-blue);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.85rem; color: white;
  flex-shrink: 0;
}
.sidebar-brand-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: white;
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.sidebar-brand-sub {
  font-size: 0.68rem;
  color: var(--sidebar-text-dim);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Nav */
.sidebar-nav { flex: 1; padding: 0.5rem 0; }

.sidebar-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sidebar-text-dim);
  padding: 1rem 1.25rem 0.35rem;
  margin-top: 0.5rem;
}

.sidebar-item { list-style: none; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 1.25rem;
  color: var(--sidebar-text);
  font-size: 0.85rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
}
.sidebar-link:hover {
  background: var(--sidebar-hover-bg);
  color: #c0cce0;
  text-decoration: none;
}
.sidebar-link.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-fg);
  border-left-color: var(--sidebar-border);
  font-weight: 600;
}
.sidebar-link i { font-size: 1rem; flex-shrink: 0; opacity: 0.9; }
.sidebar-link .si-arrow {
  margin-left: auto;
  font-size: 0.7rem;
  opacity: 0.5;
  transition: transform var(--t-base);
}
.sidebar-link[aria-expanded="true"] .si-arrow { transform: rotate(90deg); }

/* Sub-menu */
.sidebar-submenu {
  background: rgba(0,0,0,0.15);
  list-style: none;
  padding: 0.25rem 0;
  margin: 0;
}
.sidebar-submenu .sidebar-link {
  padding-left: 2.85rem;
  font-size: 0.82rem;
  font-weight: 400;
  border-left: 3px solid transparent;
}
.sidebar-submenu .sidebar-link.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-fg);
  border-left-color: var(--sidebar-border);
  font-weight: 600;
}

/* Footer */
.sidebar-footer {
  padding: 0.75rem 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════
   5. TOP NAVIGATION BAR
   ══════════════════════════════════════════════════ */
.rmu-topnav {
  position: sticky;
  top: 0;
  height: var(--topnav-h);
  background: var(--topnav-bg);
  border-bottom: 1px solid var(--topnav-border);
  box-shadow: var(--topnav-shadow);
  display: flex;
  align-items: center;
  padding: 0 1.75rem;
  gap: 1rem;
  z-index: 1030;
  flex-shrink: 0;
}

.topnav-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  color: var(--text-secondary);
  font-size: 1.25rem;
  padding: 0.35rem;
  border-radius: var(--r-sm);
}
.topnav-toggle:hover { background: var(--page-bg); }

.topnav-breadcrumb { flex: 1; }
.topnav-breadcrumb h1 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}
.topnav-breadcrumb small {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.topnav-actions { display: flex; align-items: center; gap: 0.5rem; }

.topnav-icon-btn {
  background: none; border: none; cursor: pointer;
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  transition: background var(--t-fast), color var(--t-fast);
}
.topnav-icon-btn:hover { background: var(--page-bg); color: var(--text-primary); }

.topnav-divider {
  width: 1px; height: 28px;
  background: var(--card-border);
  margin: 0 0.25rem;
}

.topnav-avatar {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.35rem 0.6rem;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background var(--t-fast);
  border: none; background: none;
}
.topnav-avatar:hover { background: var(--page-bg); }
.topnav-avatar .av-circle {
  width: 34px; height: 34px;
  background: var(--rmu-blue);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700; color: white;
  flex-shrink: 0;
}
.topnav-avatar .av-info { text-align: left; }
.topnav-avatar .av-name {
  font-size: 0.82rem; font-weight: 600;
  color: var(--text-primary); line-height: 1.2;
  max-width: 130px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.topnav-avatar .av-role {
  font-size: 0.7rem; color: var(--text-muted);
}

/* ══════════════════════════════════════════════════
   6. PAGE CONTENT AREA
   ══════════════════════════════════════════════════ */
.rmu-content {
  padding: 1.75rem;
  flex: 1;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.page-header-title {
  font-size: 1.4rem; font-weight: 700;
  color: var(--text-primary); margin: 0;
}
.page-header-subtitle {
  font-size: 0.8rem; color: var(--text-muted);
  margin: 0.2rem 0 0;
}
.page-header-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ══════════════════════════════════════════════════
   7. KPI STAT CARDS
   ══════════════════════════════════════════════════ */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 1.35rem 1.5rem;
  border-left: 4px solid transparent;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--t-base), transform var(--t-base);
}
.kpi-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.kpi-card.kpi-blue   { border-left-color: var(--c-blue); }
.kpi-card.kpi-green  { border-left-color: var(--c-green); }
.kpi-card.kpi-amber  { border-left-color: var(--c-amber); }
.kpi-card.kpi-red    { border-left-color: var(--c-red); }
.kpi-card.kpi-purple { border-left-color: var(--c-purple); }
.kpi-card.kpi-cyan   { border-left-color: var(--c-cyan); }
.kpi-card.kpi-indigo { border-left-color: var(--c-indigo); }
.kpi-card.kpi-slate  { border-left-color: var(--c-slate); }

.kpi-label {
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--text-muted); margin-bottom: 0.5rem;
}
.kpi-value {
  font-size: 1.9rem; font-weight: 800;
  color: var(--text-primary); line-height: 1;
  margin-bottom: 0.35rem;
  letter-spacing: -0.02em;
}
.kpi-sub {
  font-size: 0.75rem; color: var(--text-muted);
}
.kpi-bg-icon {
  position: absolute; right: 1rem; top: 50%;
  transform: translateY(-50%);
  font-size: 3.5rem; opacity: 0.06;
  pointer-events: none;
}

/* ══════════════════════════════════════════════════
   8. SECTION CARDS
   ══════════════════════════════════════════════════ */
.rmu-card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
  overflow: hidden;
}
.rmu-card-header {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
  background: white;
}
.rmu-card-title {
  font-size: 0.9rem; font-weight: 700;
  color: var(--text-primary); margin: 0;
}
.rmu-card-subtitle {
  font-size: 0.75rem; color: var(--text-muted);
  margin: 0.1rem 0 0;
}
.rmu-card-body { padding: 1.5rem; }

/* ══════════════════════════════════════════════════
   9. ACTIVITY FEED
   ══════════════════════════════════════════════════ */
.activity-list { list-style: none; padding: 0; margin: 0; }
.activity-item {
  display: flex; align-items: flex-start; gap: 0.9rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--card-border);
}
.activity-item:last-child { border-bottom: none; }

.activity-dot {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; flex-shrink: 0;
  margin-top: 0.1rem;
}
.activity-dot.dot-add     { background: #dbeafe; color: var(--c-blue); }
.activity-dot.dot-move    { background: #d1fae5; color: var(--c-green); }
.activity-dot.dot-dispose { background: #fee2e2; color: var(--c-red); }
.activity-dot.dot-edit    { background: #fef3c7; color: var(--c-amber); }

.activity-body { flex: 1; min-width: 0; }
.activity-text {
  font-size: 0.82rem; color: var(--text-primary);
  line-height: 1.4; word-break: break-word;
}
.activity-text strong { font-weight: 600; }
.activity-time {
  font-size: 0.72rem; color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ══════════════════════════════════════════════════
  10. QUICK ACTIONS
   ══════════════════════════════════════════════════ */
.quick-actions {
  display: flex; flex-direction: column; gap: 0.55rem;
}
.quick-action-btn {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.8rem 1rem;
  border-radius: var(--r-md);
  border: 1px solid var(--card-border);
  background: white;
  font-size: 0.85rem; font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
  text-decoration: none;
}
.quick-action-btn:hover {
  background: var(--page-bg);
  border-color: var(--rmu-blue);
  box-shadow: 0 0 0 3px var(--rmu-blue-light);
  color: var(--text-primary);
}
.quick-action-btn .qa-icon {
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; flex-shrink: 0;
}
.qa-blue   .qa-icon { background: #dbeafe; color: var(--c-blue); }
.qa-green  .qa-icon { background: #d1fae5; color: var(--c-green); }
.qa-red    .qa-icon { background: #fee2e2; color: var(--c-red); }
.qa-amber  .qa-icon { background: #fef3c7; color: var(--c-amber); }
.qa-purple .qa-icon { background: #ede9fe; color: var(--c-purple); }
.qa-cyan   .qa-icon { background: #cffafe; color: var(--c-cyan); }

/* ══════════════════════════════════════════════════
  11. TABLES
   ══════════════════════════════════════════════════ */
.rmu-table-wrapper {
  overflow-x: auto;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
}
.rmu-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.83rem; background: white;
}
.rmu-table thead th {
  background: #f8fafc;
  padding: 0.8rem 1rem;
  font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
  position: sticky; top: 0; z-index: 10;
}
.rmu-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text-primary);
  vertical-align: middle;
}
.rmu-table tbody tr:hover { background: #f8fafc; }
.rmu-table tbody tr:last-child td { border-bottom: none; }

.rmu-table tfoot td {
  background: #f8fafc;
  font-weight: 700;
  padding: 0.8rem 1rem;
  border-top: 2px solid var(--card-border);
}

/* ══════════════════════════════════════════════════
  12. FORMS
   ══════════════════════════════════════════════════ */
.rmu-form-card {
  background: white;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
  padding: 2rem;
}
.rmu-form-section {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
}
.rmu-form-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.rmu-form-section-title {
  font-size: 0.82rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.8rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 0.35rem;
}
.form-control, .form-select {
  border-color: #d1d9e0;
  border-radius: var(--r-sm);
  font-size: 0.88rem;
  padding: 0.55rem 0.85rem;
  color: var(--text-primary);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-control:focus, .form-select:focus {
  border-color: var(--rmu-blue);
  box-shadow: 0 0 0 3px var(--rmu-blue-light);
  outline: none;
}
.form-text { font-size: 0.75rem; color: var(--text-muted); }

/* ══════════════════════════════════════════════════
  13. BUTTONS
   ══════════════════════════════════════════════════ */
.btn { font-size: 0.85rem; font-weight: 600; border-radius: var(--r-sm); }
.btn-sm { font-size: 0.78rem; padding: 0.35rem 0.8rem; }
.btn-lg { font-size: 0.92rem; padding: 0.65rem 1.4rem; }

.btn-primary {
  background: var(--rmu-blue); border-color: var(--rmu-blue);
  color: white;
}
.btn-primary:hover { background: var(--rmu-blue-dark); border-color: var(--rmu-blue-dark); }
.btn-primary:focus { box-shadow: 0 0 0 3px var(--rmu-blue-light); }

.btn-outline-primary {
  border-color: var(--rmu-blue); color: var(--rmu-blue);
}
.btn-outline-primary:hover { background: var(--rmu-blue); color: white; }

/* ══════════════════════════════════════════════════
  14. BADGES & STATUS PILLS
   ══════════════════════════════════════════════════ */
.status-pill {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.03em;
}
.status-pill::before {
  content: ''; width: 6px; height: 6px;
  border-radius: 50%; background: currentColor; flex-shrink: 0;
}
.status-active   { background: #d1fae5; color: #065f46; }
.status-disposed { background: #fee2e2; color: #991b1b; }
.status-archived { background: #f1f5f9; color: #475569; }
.status-warning  { background: #fef3c7; color: #92400e; }

/* ══════════════════════════════════════════════════
  15. EMPTY STATES
   ══════════════════════════════════════════════════ */
.rmu-empty {
  text-align: center;
  padding: 3.5rem 2rem;
  color: var(--text-muted);
}
.rmu-empty-icon {
  font-size: 3rem;
  opacity: 0.25;
  margin-bottom: 1rem;
  display: block;
}
.rmu-empty h6 { font-weight: 600; color: var(--text-secondary); margin-bottom: 0.35rem; }
.rmu-empty p  { font-size: 0.82rem; }

/* ══════════════════════════════════════════════════
  16. DROPDOWN MENUS
   ══════════════════════════════════════════════════ */
.dropdown-menu {
  border: 1px solid var(--card-border);
  box-shadow: 0 8px 24px rgba(15,23,40,0.12);
  border-radius: var(--r-md);
  font-size: 0.85rem;
}
.dropdown-item {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  color: var(--text-primary);
  display: flex; align-items: center; gap: 0.6rem;
}
.dropdown-item:hover { background: var(--page-bg); }
.dropdown-item.text-danger { color: #dc2626; }
.dropdown-divider { border-color: var(--card-border); }

/* ══════════════════════════════════════════════════
  17. CHART CONTAINERS
   ══════════════════════════════════════════════════ */
.chart-wrap {
  position: relative;
  min-height: 260px;
  display: flex; align-items: center; justify-content: center;
}

/* ══════════════════════════════════════════════════
  18. SIDEBAR OVERLAY (mobile)
   ══════════════════════════════════════════════════ */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(15,23,40,0.45);
  z-index: 1039;
}
body.sidebar-open .sidebar-overlay { display: block; }
body.sidebar-open .rmu-sidebar { transform: translateX(0); }

/* ══════════════════════════════════════════════════
  19. RESPONSIVE
   ══════════════════════════════════════════════════ */
@media (max-width: 991.98px) {
  .rmu-sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
  }
  .rmu-main { margin-left: 0; }
  .topnav-toggle { display: flex; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .topnav-avatar .av-info { display: none; }
}

@media (max-width: 575.98px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .rmu-content { padding: 1rem; }
  .page-header { flex-direction: column; align-items: stretch; }
}

/* ══════════════════════════════════════════════════
  20. UTILITIES
   ══════════════════════════════════════════════════ */
.text-primary-rmu { color: var(--text-primary) !important; }
.text-muted-rmu   { color: var(--text-muted) !important; }
.bg-page          { background: var(--page-bg) !important; }
.fw-800           { font-weight: 800 !important; }
.rounded-rmu      { border-radius: var(--card-radius) !important; }

.section-gap { margin-bottom: 1.5rem; }

/* number format helper */
.num { font-variant-numeric: tabular-nums; }

/* Neutral page top-bar (sidebar-free) — used by reports + by audit pages when
   opened by oversight/read-only roles from the Portal. */
.report-topbar {
  background: #fff; border-bottom: 1px solid var(--card-border);
  box-shadow: var(--topnav-shadow); padding: 0 1.75rem; height: var(--topnav-h);
  display: flex; align-items: center; gap: 1rem;
  position: sticky; top: 0; z-index: 1030;
}
.rmu-content-full { padding: 1.75rem; }