/* ============================================================
   Trivana School Management System  — APEX ERP STYLE DESIGN SYSTEM
   Version: 2.0
   ============================================================ */

/* ----------------------------------------------------------
   1. GOOGLE FONTS & CSS VARIABLES (Design Tokens)
   ---------------------------------------------------------- */

:root {
  /* Brand / Primary */
  --clr-primary:        #0F766E;
  --clr-primary-light:  #14B8A6;
  --clr-primary-dark:   #0D5F59;
  --clr-primary-alpha:  rgba(15, 118, 110, 0.1);

  /* Sidebar */
  --clr-sidebar-bg:     #0B1220;
  --clr-sidebar-hover:  #111827;
  --clr-sidebar-active: #0F766E;
  --clr-sidebar-border: rgba(255,255,255,0.07);
  --clr-sidebar-text:   #CBD5E1;
  --clr-sidebar-muted:  #64748B;

  /* Status */
  --clr-success:        #22C55E;
  --clr-success-alpha:  rgba(34,197,94,0.12);
  --clr-warning:        #F59E0B;
  --clr-warning-alpha:  rgba(245,158,11,0.12);
  --clr-danger:         #EF4444;
  --clr-danger-alpha:   rgba(239,68,68,0.12);
  --clr-info:           #3B82F6;
  --clr-info-alpha:     rgba(59,130,246,0.12);

  /* Backgrounds */
  --clr-bg:             #F8FAFC;
  --clr-card:           #FFFFFF;
  --clr-border:         #E5E7EB;
  --clr-border-light:   #F3F4F6;

  /* Typography */
  --clr-text-primary:   #111827;
  --clr-text-secondary: #6B7280;
  --clr-text-muted:     #9CA3AF;
  --clr-text-inverse:   #FFFFFF;

  /* Layout */
  --sidebar-width:      260px;
  --sidebar-collapsed:  72px;
  --topbar-height:      64px;

  /* Spacing */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:   16px;
  --space-lg:   24px;
  --space-xl:   32px;
  --space-2xl:  48px;

  /* Border Radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  14px;
  --radius-xl:  20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-card:0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);

  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.35s ease;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs:   11px;
  --font-size-sm:   13px;
  --font-size-base: 14px;
  --font-size-md:   15px;
  --font-size-lg:   16px;
  --font-size-xl:   18px;
  --font-size-2xl:  22px;
  --font-size-3xl:  28px;
}

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

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--clr-text-primary);
  background: var(--clr-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ----------------------------------------------------------
   3. APP SHELL — SIDEBAR + MAIN LAYOUT
   ---------------------------------------------------------- */
#erp-app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* ----- Sidebar ----- */
.erp-sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100vh;
  background: var(--clr-sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  transition: var(--transition-slow);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.erp-sidebar::-webkit-scrollbar { width: 4px; }
.erp-sidebar::-webkit-scrollbar-track { background: transparent; }
.erp-sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

/* Sidebar Brand */
.erp-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 18px;
  border-bottom: 1px solid var(--clr-sidebar-border);
  flex-shrink: 0;
}

.erp-brand-logo {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.erp-brand-text h1 {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: white;
  margin: 0;
  line-height: 1.2;
}

.erp-brand-text span {
  font-size: var(--font-size-xs);
  color: var(--clr-sidebar-muted);
  display: block;
  margin-top: 1px;
}

/* Sidebar Nav Section Headers */
.erp-nav-section-title {
  padding: 16px 20px 6px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-sidebar-muted);
}

/* Sidebar Nav Items */
.erp-nav {
  list-style: none;
  padding: 8px 10px;
  margin: 0;
  flex: 1;
}

.erp-nav-item {
  margin-bottom: 2px;
}

.erp-nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  color: var(--clr-sidebar-text) !important;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none !important;
  transition: var(--transition-fast);
  position: relative;
  cursor: pointer;
  white-space: nowrap;
}

.erp-nav-link:hover {
  background: var(--clr-sidebar-hover);
  color: white !important;
}

.erp-nav-link.active {
  background: var(--clr-primary) !important;
  color: white !important;
  box-shadow: 0 2px 8px rgba(15,118,110,0.4);
}

.erp-nav-link i {
  font-size: 15px;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.erp-nav-link .erp-nav-label {
  flex: 1;
}

.erp-nav-link .erp-nav-badge {
  background: rgba(255,255,255,0.12);
  color: var(--clr-sidebar-text);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  min-width: 20px;
  text-align: center;
  line-height: 1.4;
}

.erp-nav-link.active .erp-nav-badge {
  background: rgba(255,255,255,0.2);
  color: white;
}

.erp-nav-link .erp-chevron {
  font-size: 11px;
  transition: transform 0.2s ease;
  margin-left: auto;
}

.erp-nav-link[aria-expanded="true"] .erp-chevron,
.erp-nav-link:not(.collapsed) .erp-chevron {
  transform: rotate(180deg);
}

.erp-nav-link.disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: default;
}

/* Sidebar Submenu */
.erp-submenu {
  list-style: none;
  padding: 4px 0 4px 30px;
  margin: 0;
}

.erp-submenu .erp-nav-item {
  margin-bottom: 1px;
}

.erp-submenu .erp-nav-link {
  font-size: var(--font-size-xs);
  padding: 7px 10px;
  font-weight: 500;
  color: var(--clr-sidebar-muted) !important;
}

.erp-submenu .erp-nav-link::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--clr-sidebar-muted);
  flex-shrink: 0;
}

.erp-submenu .erp-nav-link:hover {
  color: white !important;
  background: rgba(255,255,255,0.06);
}

.erp-submenu .erp-nav-link:hover::before,
.erp-submenu .erp-nav-link.active-sub::before {
  background: var(--clr-primary-light);
}

.erp-submenu .erp-nav-link.active-sub {
  color: var(--clr-primary-light) !important;
  background: rgba(15,118,110,0.1);
}

/* Sidebar Footer */
.erp-sidebar-footer {
  padding: 12px 10px;
  border-top: 1px solid var(--clr-sidebar-border);
  flex-shrink: 0;
}

/* Sidebar Session Info */
.erp-session-badge {
  background: rgba(15,118,110,0.15);
  border: 1px solid rgba(15,118,110,0.3);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  margin: 4px 10px 10px;
}

.erp-session-badge .erp-session-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-sidebar-muted);
  display: block;
  margin-bottom: 2px;
}

.erp-session-badge .erp-session-name {
  font-size: var(--font-size-sm);
  color: var(--clr-primary-light);
  font-weight: 600;
}

.erp-session-badge.erp-session-warning {
  background: rgba(239,68,68,0.1);
  border-color: rgba(239,68,68,0.3);
}

.erp-session-badge.erp-session-warning .erp-session-name {
  color: #FCA5A5;
}

/* ----- Main Content Area ----- */
.erp-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow: hidden;
}

/* ----------------------------------------------------------
   4. TOPBAR / NAVBAR
   ---------------------------------------------------------- */
.erp-topbar {
  height: var(--topbar-height);
  background: var(--clr-card);
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-xs);
  flex-shrink: 0;
}

.erp-topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

/* Mobile Sidebar Toggle */
.erp-sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--clr-text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.erp-sidebar-toggle:hover {
  background: var(--clr-bg);
  color: var(--clr-text-primary);
}

/* Page Breadcrumb in topbar */
.erp-topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--clr-text-muted);
}

.erp-topbar-breadcrumb .erp-breadcrumb-sep { color: var(--clr-border); }
.erp-topbar-breadcrumb .erp-breadcrumb-active {
  color: var(--clr-text-primary);
  font-weight: 600;
}

/* Search */
.erp-search {
  position: relative;
  max-width: 280px;
}

.erp-search-input {
  width: 100%;
  height: 36px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: 0 14px 0 36px;
  font-size: var(--font-size-sm);
  color: var(--clr-text-primary);
  background: var(--clr-bg);
  outline: none;
  transition: var(--transition-fast);
  font-family: var(--font-family);
}

.erp-search-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-primary-alpha);
  background: white;
}

.erp-search-input::placeholder { color: var(--clr-text-muted); }

.erp-search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--clr-text-muted);
  font-size: 14px;
  pointer-events: none;
}

/* Topbar Right */
.erp-topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Icon Buttons */
.erp-icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  background: var(--clr-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-secondary);
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  text-decoration: none !important;
}

.erp-icon-btn:hover {
  background: var(--clr-card);
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

.erp-icon-btn .erp-notif-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  background: var(--clr-danger);
  border-radius: 50%;
  border: 1.5px solid white;
}

/* User Profile */
.erp-user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 12px 5px 5px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  background: var(--clr-bg);
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none !important;
}

.erp-user-profile:hover {
  background: var(--clr-card);
  border-color: var(--clr-primary);
}

.erp-user-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.erp-user-info {
  display: flex;
  flex-direction: column;
}

.erp-user-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--clr-text-primary);
  line-height: 1.2;
}

.erp-user-role {
  font-size: 10px;
  color: var(--clr-text-muted);
  text-transform: capitalize;
}

.erp-topbar .dropdown-menu {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  min-width: 180px;
}

.erp-topbar .dropdown-item {
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: var(--font-size-sm);
  color: var(--clr-text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition-fast);
}

.erp-topbar .dropdown-item:hover {
  background: var(--clr-primary-alpha);
  color: var(--clr-primary);
}

.erp-topbar .dropdown-item.text-danger:hover {
  background: var(--clr-danger-alpha);
  color: var(--clr-danger);
}

.erp-topbar .dropdown-divider {
  margin: 4px 0;
  border-color: var(--clr-border-light);
}

/* ----------------------------------------------------------
   5. PAGE CONTENT
   ---------------------------------------------------------- */
.erp-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  background: var(--clr-bg);
}

.erp-content::-webkit-scrollbar { width: 6px; }
.erp-content::-webkit-scrollbar-track { background: transparent; }
.erp-content::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 4px; }

/* Page Header */
.erp-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.erp-page-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--clr-text-primary);
  margin: 0 0 4px;
  line-height: 1.2;
}

.erp-page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--clr-text-secondary);
  margin: 0;
}

/* Breadcrumb */
.erp-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0 0 4px;
  font-size: var(--font-size-sm);
}

.erp-breadcrumb-item a {
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.erp-breadcrumb-item a:hover { color: var(--clr-primary); }

.erp-breadcrumb-item + .erp-breadcrumb-item::before {
  content: '/';
  color: var(--clr-text-muted);
  margin-right: 6px;
  opacity: 0.5;
}

.erp-breadcrumb-item.active { color: var(--clr-text-secondary); }

/* ----------------------------------------------------------
   6. CARD SYSTEM
   ---------------------------------------------------------- */
.erp-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
}

.erp-card:hover { box-shadow: var(--shadow-md); }

.erp-card-header {
  padding: 18px 20px 16px;
  border-bottom: 1px solid var(--clr-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.erp-card-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--clr-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.erp-card-title i {
  color: var(--clr-primary);
  font-size: 16px;
}

.erp-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.erp-card-body { padding: 20px; }
.erp-card-body-sm { padding: 14px 20px; }
.erp-card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--clr-border-light);
  background: var(--clr-bg);
}

/* ----------------------------------------------------------
   7. STAT / METRIC CARDS
   ---------------------------------------------------------- */
.erp-stat-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.erp-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.erp-stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-accent, var(--clr-primary));
}

.erp-stat-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.erp-stat-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-text-secondary);
  margin-bottom: 4px;
}

.erp-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--clr-text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.erp-stat-sub {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
}

.erp-stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  background: var(--stat-icon-bg, var(--clr-primary-alpha));
  color: var(--stat-accent, var(--clr-primary));
}

/* Stat Card Variants */
.erp-stat-primary { --stat-accent: var(--clr-primary); --stat-icon-bg: var(--clr-primary-alpha); }
.erp-stat-success { --stat-accent: var(--clr-success); --stat-icon-bg: var(--clr-success-alpha); }
.erp-stat-warning { --stat-accent: var(--clr-warning); --stat-icon-bg: var(--clr-warning-alpha); }
.erp-stat-info    { --stat-accent: var(--clr-info);    --stat-icon-bg: var(--clr-info-alpha); }
.erp-stat-danger  { --stat-accent: var(--clr-danger);  --stat-icon-bg: var(--clr-danger-alpha); }

/* ----------------------------------------------------------
   8. BUTTON SYSTEM
   ---------------------------------------------------------- */
.btn-erp,
.btn-erp-sm,
.btn-erp-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-family);
  font-weight: 500;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none !important;
  transition: var(--transition-fast);
  white-space: nowrap;
  outline: none;
}

.btn-erp         { padding: 8px 18px; font-size: var(--font-size-sm); height: 36px; }
.btn-erp-sm      { padding: 5px 12px; font-size: var(--font-size-xs); height: 30px; border-radius: var(--radius-sm); }
.btn-erp-lg      { padding: 10px 22px; font-size: var(--font-size-md); height: 42px; }

/* Primary */
.btn-erp-primary {
  background: var(--clr-primary);
  color: white;
  border-color: var(--clr-primary);
}
.btn-erp-primary:hover {
  background: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
  color: white;
  box-shadow: 0 4px 12px rgba(15,118,110,0.3);
  transform: translateY(-1px);
}
.btn-erp-primary:focus {
  box-shadow: 0 0 0 3px var(--clr-primary-alpha);
}
.btn-erp-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Secondary / Outline */
.btn-erp-secondary {
  background: white;
  color: var(--clr-text-primary);
  border-color: var(--clr-border);
}
.btn-erp-secondary:hover {
  background: var(--clr-bg);
  border-color: var(--clr-text-secondary);
  color: var(--clr-text-primary);
}

/* Success */
.btn-erp-success { background: var(--clr-success); color: white; border-color: var(--clr-success); }
.btn-erp-success:hover { background: #16A34A; border-color: #16A34A; color: white; box-shadow: 0 4px 12px rgba(34,197,94,0.3); transform: translateY(-1px); }

/* Danger */
.btn-erp-danger { background: var(--clr-danger); color: white; border-color: var(--clr-danger); }
.btn-erp-danger:hover { background: #DC2626; border-color: #DC2626; color: white; box-shadow: 0 4px 12px rgba(239,68,68,0.3); transform: translateY(-1px); }

/* Warning */
.btn-erp-warning { background: var(--clr-warning); color: white; border-color: var(--clr-warning); }
.btn-erp-warning:hover { background: #D97706; border-color: #D97706; color: white; transform: translateY(-1px); }

/* Ghost */
.btn-erp-ghost { background: transparent; color: var(--clr-primary); border-color: var(--clr-primary); }
.btn-erp-ghost:hover { background: var(--clr-primary-alpha); color: var(--clr-primary); }

/* Icon only */
.btn-erp-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ----------------------------------------------------------
   9. TABLE SYSTEM
   ---------------------------------------------------------- */
.erp-table-wrap {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.erp-table-toolbar {
  padding: 14px 20px;
  border-bottom: 1px solid var(--clr-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.erp-table-toolbar-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--clr-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.erp-table-toolbar-title i { color: var(--clr-primary); }

.erp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.erp-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
}

.erp-table thead th {
  background: var(--clr-bg);
  padding: 10px 16px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-secondary);
  border-bottom: 1px solid var(--clr-border);
  white-space: nowrap;
}

.erp-table tbody td {
  padding: 12px 16px;
  color: var(--clr-text-primary);
  border-bottom: 1px solid var(--clr-border-light);
  vertical-align: middle;
}

.erp-table tbody tr:last-child td { border-bottom: none; }

.erp-table tbody tr:nth-child(even) { background: #FAFBFC; }

.erp-table tbody tr {
  transition: var(--transition-fast);
}

.erp-table tbody tr:hover {
  background: var(--clr-primary-alpha);
}

/* Table Avatar */
.erp-table-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--clr-border);
}

.erp-table-avatar-placeholder {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

/* ----------------------------------------------------------
   10. FORM SYSTEM
   ---------------------------------------------------------- */
.erp-form-section {
  margin-bottom: 28px;
}

.erp-form-section-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--clr-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--clr-primary-alpha);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.erp-form-group { margin-bottom: 16px; }

.erp-form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--clr-text-primary);
  margin-bottom: 6px;
}

.erp-form-label sup { color: var(--clr-danger); margin-left: 2px; }

.erp-form-control,
.erp-form-select {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--clr-text-primary);
  background: white;
  outline: none;
  transition: var(--transition-fast);
  font-family: var(--font-family);
  appearance: none;
}

.erp-form-control:focus,
.erp-form-select:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-primary-alpha);
}

.erp-form-control::placeholder { color: var(--clr-text-muted); }

.erp-form-control.is-invalid,
.erp-form-select.is-invalid {
  border-color: var(--clr-danger);
  box-shadow: 0 0 0 3px var(--clr-danger-alpha);
}

.erp-form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  padding-right: 36px;
}

.erp-form-hint {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
  margin-top: 4px;
}

.erp-form-error {
  font-size: var(--font-size-xs);
  color: var(--clr-danger);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* File Upload */
.erp-file-label {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: var(--transition-fast);
  background: var(--clr-bg);
}

.erp-file-label:hover {
  border-color: var(--clr-primary);
  background: var(--clr-primary-alpha);
}

.erp-file-input { display: none; }

/* ----------------------------------------------------------
   11. BADGE / LABEL SYSTEM
   ---------------------------------------------------------- */
.erp-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.erp-badge-primary { background: var(--clr-primary-alpha); color: var(--clr-primary); }
.erp-badge-success { background: var(--clr-success-alpha); color: #15803D; }
.erp-badge-warning { background: var(--clr-warning-alpha); color: #B45309; }
.erp-badge-danger  { background: var(--clr-danger-alpha);  color: #B91C1C; }
.erp-badge-info    { background: var(--clr-info-alpha);    color: #1D4ED8; }
.erp-badge-neutral { background: #F3F4F6; color: var(--clr-text-secondary); }

/* Status dots */
.erp-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.erp-status-dot.online  { background: var(--clr-success); box-shadow: 0 0 0 2px var(--clr-success-alpha); }
.erp-status-dot.away    { background: var(--clr-warning); }
.erp-status-dot.offline { background: var(--clr-text-muted); }

/* ----------------------------------------------------------
   12. ALERT / SESSION MESSAGES
   ---------------------------------------------------------- */
.erp-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  font-size: var(--font-size-sm);
  border: 1px solid transparent;
}

.erp-alert i { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

.erp-alert-success {
  background: var(--clr-success-alpha);
  border-color: rgba(34,197,94,0.3);
  color: #166534;
}
.erp-alert-success i { color: var(--clr-success); }

.erp-alert-danger {
  background: var(--clr-danger-alpha);
  border-color: rgba(239,68,68,0.3);
  color: #991B1B;
}
.erp-alert-danger i { color: var(--clr-danger); }

.erp-alert-warning {
  background: var(--clr-warning-alpha);
  border-color: rgba(245,158,11,0.3);
  color: #92400E;
}
.erp-alert-warning i { color: var(--clr-warning); }

.erp-alert-info {
  background: var(--clr-info-alpha);
  border-color: rgba(59,130,246,0.3);
  color: #1E40AF;
}
.erp-alert-info i { color: var(--clr-info); }

/* ----------------------------------------------------------
   13. NOTICE CARDS
   ---------------------------------------------------------- */
.erp-notice-item {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 10px;
  transition: var(--transition-fast);
}

.erp-notice-item:hover { box-shadow: var(--shadow-sm); }

.erp-notice-header {
  padding: 12px 16px;
  background: var(--clr-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  border-bottom: 1px solid var(--clr-border-light);
}

.erp-notice-meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.erp-notice-date {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
}

.erp-notice-body {
  padding: 14px 16px;
  font-size: var(--font-size-sm);
  color: var(--clr-text-secondary);
}

/* ----------------------------------------------------------
   14. PROGRESS BAR
   ---------------------------------------------------------- */
.erp-progress {
  height: 8px;
  background: var(--clr-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.erp-progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}

.erp-progress-bar.male { background: var(--clr-primary); }
.erp-progress-bar.female { background: var(--clr-info); }

.erp-progress-label {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
  margin-bottom: 4px;
}

/* ----------------------------------------------------------
   15. FOOTER
   ---------------------------------------------------------- */
.erp-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--clr-card);
  flex-shrink: 0;
}

.erp-footer-text {
  font-size: var(--font-size-xs);
  color: var(--clr-text-muted);
}

.erp-footer-link {
  color: var(--clr-primary);
  text-decoration: none;
}

/* ----------------------------------------------------------
   16. ACCORDION (Notices, etc.)
   ---------------------------------------------------------- */
.erp-accordion-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

.erp-accordion-btn .erp-chevron {
  transition: transform 0.2s ease;
}

.erp-accordion-btn[aria-expanded="true"] .erp-chevron {
  transform: rotate(180deg);
}

/* ----------------------------------------------------------
   17. RESPONSIVE
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .erp-sidebar {
    transform: translateX(-100%);
  }
  .erp-sidebar.show {
    transform: translateX(0);
  }
  .erp-main {
    margin-left: 0;
  }
  .erp-sidebar-toggle {
    display: flex !important;
  }
  .erp-search {
    display: none;
  }
}

@media (max-width: 768px) {
  .erp-content {
    padding: 16px;
  }
  .erp-topbar {
    padding: 0 16px;
  }
  .erp-page-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .erp-stat-value {
    font-size: 22px;
  }
  .erp-table-wrap {
    overflow-x: auto;
  }
  .erp-user-info { display: none; }
}

@media (max-width: 480px) {
  .erp-content { padding: 12px; }
  .erp-page-title { font-size: var(--font-size-xl); }
}

/* Sidebar Overlay for mobile */
.erp-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.erp-sidebar-overlay.show {
  display: block;
  opacity: 1;
}

/* ----------------------------------------------------------
   18. UTILITIES
   ---------------------------------------------------------- */
.erp-text-primary   { color: var(--clr-primary) !important; }
.erp-text-success   { color: var(--clr-success) !important; }
.erp-text-warning   { color: var(--clr-warning) !important; }
.erp-text-danger    { color: var(--clr-danger) !important; }
.erp-text-info      { color: var(--clr-info) !important; }
.erp-text-muted     { color: var(--clr-text-muted) !important; }
.erp-text-secondary { color: var(--clr-text-secondary) !important; }

.erp-bg-primary  { background: var(--clr-primary-alpha) !important; }
.erp-bg-success  { background: var(--clr-success-alpha) !important; }
.erp-bg-warning  { background: var(--clr-warning-alpha) !important; }
.erp-bg-danger   { background: var(--clr-danger-alpha) !important; }

.erp-divider {
  height: 1px;
  background: var(--clr-border-light);
  margin: 12px 0;
}

.erp-empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--clr-text-muted);
}

.erp-empty-state i {
  font-size: 40px;
  display: block;
  margin-bottom: 12px;
  opacity: 0.5;
}

.erp-empty-state p {
  font-size: var(--font-size-sm);
  margin: 0;
}

.erp-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.erp-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.erp-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

@media (max-width: 1200px) {
  .erp-grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .erp-grid-2,
  .erp-grid-3,
  .erp-grid-4 { grid-template-columns: 1fr; }
}

/* ----------------------------------------------------------
   19. CALENDAR OVERRIDE
   ---------------------------------------------------------- */
.fc {
  font-family: var(--font-family) !important;
  font-size: var(--font-size-sm);
}

.fc .fc-toolbar-title {
  font-size: var(--font-size-lg) !important;
  font-weight: 700 !important;
  color: var(--clr-text-primary) !important;
}

.fc .fc-button {
  background: var(--clr-primary) !important;
  border-color: var(--clr-primary) !important;
  font-family: var(--font-family) !important;
  font-size: var(--font-size-xs) !important;
  font-weight: 500 !important;
  border-radius: var(--radius-sm) !important;
  padding: 5px 10px !important;
}

.fc .fc-button:hover { background: var(--clr-primary-dark) !important; }

.fc .fc-daygrid-day.fc-day-today {
  background: var(--clr-primary-alpha) !important;
}

.fc .fc-col-header-cell {
  background: var(--clr-bg);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-secondary);
  padding: 8px 0;
}

.fc .fc-event {
  background: var(--clr-primary) !important;
  border: none !important;
  border-radius: 4px !important;
  font-size: 11px !important;
}

/* ----------------------------------------------------------
   20. OVERRIDE BOOTSTRAP DEFAULTS (where bootstrap.min.css is loaded)
   ---------------------------------------------------------- */
/* Override Bootstrap navbar that we're replacing */
.navbar { display: none !important; }

/* Override Bootstrap container for our layout */
#erp-app .container-fluid,
#erp-app > .container { max-width: 100%; padding: 0; }

/* Re-style bootstrap breadcrumb to match our style */
.breadcrumb {
  background: transparent;
  padding: 0;
  margin: 0;
}

.breadcrumb-item + .breadcrumb-item::before { color: var(--clr-text-muted); }
.breadcrumb-item a { color: var(--clr-text-muted); }
.breadcrumb-item.active { color: var(--clr-text-secondary); }

/* Override Bootstrap form-control */
.form-control, .form-select {
  border-color: var(--clr-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--clr-text-primary);
}

.form-control:focus, .form-select:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px var(--clr-primary-alpha);
}

/* Override Bootstrap buttons */
.btn-primary {
  background-color: var(--clr-primary);
  border-color: var(--clr-primary);
}
.btn-primary:hover, .btn-primary:focus {
  background-color: var(--clr-primary-dark);
  border-color: var(--clr-primary-dark);
}

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

/* Override Bootstrap table */
.table { font-size: var(--font-size-sm); }
.table thead th {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-secondary);
  border-bottom-width: 1px;
  background: var(--clr-bg);
}

/* Override Bootstrap card */
.card {
  border-color: var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* Override Bootstrap accordion */
.accordion-button:not(.collapsed) {
  color: var(--clr-primary);
  background-color: var(--clr-primary-alpha);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: 0 0 0 3px var(--clr-primary-alpha);
  border-color: var(--clr-primary);
}

/* Override Bootstrap badge */
.badge.bg-dark { background-color: var(--clr-primary) !important; }

/* Watermark Override */
#watermark { display: none !important; }

/* ----------------------------------------------------------
   21. PROFILE PAGE
   ---------------------------------------------------------- */
.erp-profile-hero {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  color: white;
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}

.erp-profile-hero::before {
  content: '';
  position: absolute;
  right: -20px;
  top: -20px;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.erp-profile-avatar-wrap {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.4);
  overflow: hidden;
  flex-shrink: 0;
}

.erp-profile-avatar-wrap img { width: 100%; height: 100%; object-fit: cover; }

.erp-profile-avatar-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: white;
  flex-shrink: 0;
}

.erp-profile-name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0 0 4px;
}

.erp-profile-meta {
  font-size: var(--font-size-sm);
  opacity: 0.85;
  margin: 0;
}

.erp-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.erp-info-item { }

.erp-info-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-text-muted);
  margin-bottom: 4px;
}

.erp-info-value {
  font-size: var(--font-size-sm);
  color: var(--clr-text-primary);
  font-weight: 500;
}

/* ----------------------------------------------------------
   22. ANIMATIONS
   ---------------------------------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.erp-fade-in { animation: fadeInUp 0.3s ease forwards; }

.erp-stat-card { animation: fadeInUp 0.3s ease forwards; }
.erp-stat-card:nth-child(1) { animation-delay: 0.05s; }
.erp-stat-card:nth-child(2) { animation-delay: 0.1s; }
.erp-stat-card:nth-child(3) { animation-delay: 0.15s; }
.erp-stat-card:nth-child(4) { animation-delay: 0.2s; }