/**
 * Unified Overlay & Dashboard Design System
 * City Government of Koronadal — PESO & CSWDO Portals
 * 
 * Enforces:
 * 1. Z-Index Layering: Header = top priority (1060), Nav Tabs = 1055, Overlays = 1050/1055, Dashboard = base (1).
 * 2. Non-blocking Overlay Behavior: Modals positioned below fixed header with semi-transparent blur backdrops.
 * 3. Modern Aesthetics: Subtle multi-layered shadows, rounded corners (16px / 1rem), smooth cubic-bezier animations.
 * 4. Responsive & Accessible: Adapts across desktop, tablet, and mobile; WCAG compliant in light & dark modes.
 */

:root {
  /* Z-Index Hierarchy Tokens */
  --z-base: 1;
  --z-dropdown: 1045;
  --z-sidebar: 1050;
  --z-modal-backdrop: 1050;
  --z-modal-dialog: 1055;
  --z-header-tabs: 1055;
  --z-header: 1060;
  --z-toast: 1090;

  /* Header & Navigation Metrics */
  --header-height: 70px;
  --header-tabs-height: 50px;
  --sidebar-width: 270px;

  /* Overlay Design Tokens */
  --overlay-backdrop-bg: rgba(15, 23, 42, 0.52);
  --overlay-backdrop-blur: 6px;
  --overlay-dialog-radius: 16px;
  --overlay-dialog-shadow: 0 20px 30px -6px rgba(15, 23, 42, 0.18), 0 10px 15px -4px rgba(15, 23, 42, 0.08), 0 0 0 1px rgba(15, 23, 42, 0.06);
  --overlay-transition-curve: cubic-bezier(0.16, 1, 0.3, 1);
  --overlay-transition-duration: 0.24s;
}

/* ==========================================================================
   1. FIXED HEADER & NAVIGATION LAYERING (Top Priority)
   ========================================================================== */
.top-navbar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  height: var(--header-height, 70px) !important;
  z-index: var(--z-header) !important;
  background-color: #FFFFFF !important;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04) !important;
  border-bottom: 1px solid var(--card-border, #E2E8F0) !important;
}

.header-top,
.portal-header {
  position: fixed !important;
  top: 0 !important;
  left: var(--sidebar-width, 270px) !important;
  right: 0 !important;
  height: var(--header-height, 70px) !important;
  z-index: var(--z-header) !important;
  background-color: #FFFFFF !important;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04) !important;
  border-bottom: 1px solid var(--card-border, #E2E8F0) !important;
}

.nav-tabs-custom {
  position: fixed !important;
  top: var(--header-height, 70px) !important;
  left: 0 !important;
  right: 0 !important;
  z-index: var(--z-header-tabs) !important;
  background-color: #FFFFFF !important;
  border-bottom: 1px solid var(--card-border, #E2E8F0) !important;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.03) !important;
}

.sidebar {
  z-index: var(--z-sidebar) !important;
}

/* Base Dashboard Spacing: Never obscured behind fixed header */
.main-content,
.main-wrapper {
  margin-left: var(--sidebar-width, 270px) !important;
  margin-top: var(--header-height, 70px) !important;
  padding: 28px !important;
  position: relative !important;
  z-index: var(--z-base) !important;
  min-height: calc(100vh - var(--header-height, 70px)) !important;
}

.app-container {
  position: relative !important;
  z-index: var(--z-base) !important;
  margin-top: calc(var(--header-height, 70px) + var(--header-tabs-height, 50px)) !important;
  padding: 1.75rem !important;
  min-height: calc(100vh - var(--header-height, 70px) - var(--header-tabs-height, 50px)) !important;
}

/* Body scroll locking when any modal overlay is active */
body.modal-open {
  overflow: hidden !important;
}

/* ==========================================================================
   2. CONTEXTUAL DROPDOWNS & SELECT MENUS
   ========================================================================== */
.dropdown-menu,
.select-popover,
.custom-dropdown-menu {
  z-index: var(--z-dropdown) !important;
  border-radius: 12px !important;
  border: 1px solid var(--card-border, #E2E8F0) !important;
  box-shadow: 0 12px 24px -4px rgba(15, 23, 42, 0.12), 0 4px 8px -2px rgba(15, 23, 42, 0.04) !important;
  padding: 0.5rem !important;
  margin-top: 0.35rem !important;
  animation: dropdownSlideIn var(--overlay-transition-duration) var(--overlay-transition-curve) !important;
  transform-origin: top center;
}

@keyframes dropdownSlideIn {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Prevent Table Overflows From Clipping Action Dropdowns */
.table-responsive {
  overflow-x: auto;
  overflow-y: visible !important;
}

/* ==========================================================================
   3. NON-BLOCKING MODAL OVERLAYS & BACKDROPS (Bootstrap & Custom)
   ========================================================================== */

/* Universal Backdrop: Semi-transparent with blur to maintain contextual awareness */
.modal-backdrop,
.custom-modal-backdrop {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  background-color: var(--overlay-backdrop-bg) !important;
  backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
  -webkit-backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
  z-index: var(--z-modal-backdrop) !important;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--overlay-transition-duration) var(--overlay-transition-curve) !important;
}

.modal-backdrop.show,
.custom-modal-backdrop.show {
  opacity: 1 !important;
  pointer-events: auto !important;
}

.modal-backdrop:not(.show),
.custom-modal-backdrop:not(.show) {
  pointer-events: none !important;
}

/* Custom Modal Backdrop Display Helper: Positioned aligned below header */
.custom-modal-backdrop {
  display: none;
  align-items: flex-start;
  justify-content: center;
  overflow-y: auto;
  padding: calc(var(--header-height, 70px) + 1.25rem) 1rem 2rem 1rem !important;
}

.custom-modal-backdrop.show {
  display: flex !important;
  pointer-events: auto !important;
}

.custom-modal-backdrop:not(.show) {
  display: none !important;
  pointer-events: none !important;
}

/* Standalone .custom-modal Container (CSWDO Officer Portal Structure) */
.custom-modal {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  z-index: var(--z-modal-dialog) !important;
  display: none;
  pointer-events: none;
  align-items: flex-start !important;
  justify-content: center !important;
  overflow-y: auto !important;
  padding: calc(var(--header-height, 70px) + 1.25rem) 1rem 2rem 1rem !important;
  background-color: var(--overlay-backdrop-bg) !important;
  backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
  -webkit-backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
}

.custom-modal.show {
  display: flex !important;
  pointer-events: auto !important;
}

.custom-modal:not(.show) {
  display: none !important;
  pointer-events: none !important;
}

.custom-modal .custom-modal-backdrop {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  background: transparent !important;
  backdrop-filter: none !important;
  z-index: -1 !important;
  display: block !important;
  opacity: 1 !important;
  padding: 0 !important;
}

/* Standard Bootstrap Modal Alignment (PESO Admin & PESO Officer Portals) */
.modal {
  z-index: var(--z-modal-dialog) !important;
  padding-top: calc(var(--header-height, 70px) + 1rem) !important;
  overflow-y: auto !important;
}

.modal:not(.show) {
  pointer-events: none !important;
}

.modal.show {
  pointer-events: auto !important;
}

/* Multi-tier Header Spacing for PESO Admin Sub-tabs */
.nav-tabs-custom ~ .modal,
body:has(.nav-tabs-custom) .modal {
  padding-top: calc(var(--header-height, 70px) + var(--header-tabs-height, 50px) + 1rem) !important;
}

/* Modal Dialog Geometry & Visual Depth */
.modal-dialog,
.custom-modal-dialog {
  margin: 0.5rem auto 2rem auto !important;
  border-radius: var(--overlay-dialog-radius) !important;
  box-shadow: var(--overlay-dialog-shadow) !important;
  border: 1px solid rgba(226, 232, 240, 0.8) !important;
  background-color: #FFFFFF !important;
  overflow: hidden !important;
  transform: scale(0.96) translateY(-8px);
  transition: transform var(--overlay-transition-duration) var(--overlay-transition-curve), opacity var(--overlay-transition-duration) var(--overlay-transition-curve) !important;
  max-height: calc(100vh - var(--header-height, 70px) - 2.5rem) !important;
  display: flex;
  flex-direction: column;
  animation: modalDialogPopIn var(--overlay-transition-duration) var(--overlay-transition-curve) !important;
}

.modal.show .modal-dialog,
.custom-modal-backdrop.show .custom-modal-dialog,
.custom-modal.show .custom-modal-dialog {
  transform: scale(1) translateY(0) !important;
}

@keyframes modalDialogPopIn {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(-8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Modal Internal Layout Structure */
.modal-content {
  border: none !important;
  border-radius: var(--overlay-dialog-radius) !important;
  box-shadow: none !important;
  overflow: hidden !important;
  display: flex !important;
  flex-direction: column !important;
  max-height: calc(100vh - var(--header-height, 70px) - 2.5rem) !important;
}

.modal-header,
.custom-modal-header {
  padding: 1.15rem 1.5rem !important;
  background-color: #F8FAFC !important;
  border-bottom: 1px solid var(--card-border, #E2E8F0) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  flex-shrink: 0 !important;
}

.modal-body,
.custom-modal-body {
  padding: 1.5rem !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch;
  flex-grow: 1 !important;
}

.modal-footer,
.custom-modal-footer {
  padding: 1rem 1.5rem !important;
  background-color: #F8FAFC !important;
  border-top: 1px solid var(--card-border, #E2E8F0) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: flex-end !important;
  gap: 0.75rem !important;
  flex-shrink: 0 !important;
}

/* ==========================================================================
   4. SYSTEM NOTIFICATIONS & TOAST OVERLAYS
   ========================================================================== */
.sn-overlay,
.toast-container,
#notificationContainer,
.system-notification-container {
  z-index: var(--z-toast) !important;
}

.sn-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  background-color: var(--overlay-backdrop-bg) !important;
  backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
  -webkit-backdrop-filter: blur(var(--overlay-backdrop-blur)) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 1.5rem !important;
}

.sn-card {
  border-radius: var(--overlay-dialog-radius) !important;
  box-shadow: var(--overlay-dialog-shadow) !important;
}

/* ==========================================================================
   5. DASHBOARD CARD & GRID AESTHETICS POLISH
   ========================================================================== */
.card,
.stat-card,
.content-card,
.ordinance-banner,
.calendar-card {
  border-radius: 14px !important;
  border: 1px solid var(--card-border, #E2E8F0) !important;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02) !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.card:hover,
.stat-card:hover {
  box-shadow: 0 6px 16px -2px rgba(15, 23, 42, 0.08) !important;
}

/* Close Button Accessibility & Hover Feedback */
.btn-close,
.custom-modal-close,
.btn-modal-close {
  transition: transform 0.15s ease, opacity 0.15s ease, background-color 0.15s ease !important;
  cursor: pointer !important;
}

.btn-close:hover,
.custom-modal-close:hover,
.btn-modal-close:hover {
  transform: scale(1.15) !important;
  opacity: 0.95 !important;
}

.btn-close:focus-visible,
.custom-modal-close:focus-visible,
.btn-modal-close:focus-visible {
  outline: 2px solid var(--primary, #0284C7) !important;
  outline-offset: 2px !important;
}

/* Read-Only Safeguard Styling */
.badge-read-only,
.badge-readonly {
  background: #FEF3C7 !important;
  color: #92400E !important;
  border: 1px solid #FCD34D !important;
  padding: 0.35rem 0.75rem !important;
  border-radius: 20px !important;
  font-size: 0.75rem !important;
  font-weight: 700 !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
}

/* ==========================================================================
   6. DARK MODE THEME SUPPORT
   ========================================================================== */
body.dark-mode {
  --overlay-backdrop-bg: rgba(2, 6, 23, 0.68);
  --card-border: #334155;
}

body.dark-mode .top-navbar,
body.dark-mode .header-top,
body.dark-mode .portal-header,
body.dark-mode .nav-tabs-custom {
  background-color: #0F172A !important;
  border-bottom-color: #334155 !important;
  color: #F8FAFC !important;
}

body.dark-mode .dropdown-menu,
body.dark-mode .custom-dropdown-menu {
  background-color: #1E293B !important;
  border-color: #334155 !important;
  color: #F8FAFC !important;
  box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.5) !important;
}

body.dark-mode .dropdown-item {
  color: #E2E8F0 !important;
}

body.dark-mode .dropdown-item:hover,
body.dark-mode .dropdown-item:focus {
  background-color: #334155 !important;
  color: #FFFFFF !important;
}

body.dark-mode .modal-dialog,
body.dark-mode .custom-modal-dialog,
body.dark-mode .modal-content {
  background-color: #1E293B !important;
  border-color: #334155 !important;
  color: #F8FAFC !important;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6) !important;
}

body.dark-mode .modal-header,
body.dark-mode .custom-modal-header {
  background-color: #0F172A !important;
  border-bottom-color: #334155 !important;
  color: #F8FAFC !important;
}

body.dark-mode .modal-footer,
body.dark-mode .custom-modal-footer {
  background-color: #0F172A !important;
  border-top-color: #334155 !important;
  color: #F8FAFC !important;
}

body.dark-mode .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

body.dark-mode .badge-read-only,
body.dark-mode .badge-readonly {
  background: #78350F !important;
  color: #FDE68A !important;
  border-color: #B45309 !important;
}

/* ==========================================================================
   7. RESPONSIVE BREAKPOINTS (Mobile & Tablet)
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
    --header-tabs-height: 44px;
    --sidebar-width: 0px;
  }

  .header-top,
  .portal-header {
    left: 0 !important;
  }

  .main-content,
  .main-wrapper {
    margin-left: 0 !important;
    padding: 16px !important;
  }

  .app-container {
    margin-top: calc(var(--header-height, 60px) + var(--header-tabs-height, 44px)) !important;
    padding: 1rem !important;
  }

  .custom-modal-backdrop,
  .custom-modal {
    padding: calc(var(--header-height, 60px) + 0.75rem) 0.5rem 1rem 0.5rem !important;
  }

  .modal {
    padding-top: calc(var(--header-height, 60px) + 0.5rem) !important;
  }

  .nav-tabs-custom ~ .modal,
  body:has(.nav-tabs-custom) .modal {
    padding-top: calc(var(--header-height, 60px) + var(--header-tabs-height, 44px) + 0.5rem) !important;
  }

  .modal-dialog,
  .custom-modal-dialog {
    width: 96% !important;
    max-width: 96% !important;
    margin: 0.5rem auto !important;
    border-radius: 12px !important;
  }

  .modal-body,
  .custom-modal-body {
    padding: 1rem !important;
  }

  .modal-header,
  .custom-modal-header,
  .modal-footer,
  .custom-modal-footer {
    padding: 0.85rem 1rem !important;
  }
}