/* ============================================================
   LMS v2 — Design System & Global Styles
   SMPN 3 Kalikajar
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================================
   CSS Variables
   ============================================================ */
:root {
  /* Primary (Indigo) */
  --primary-50:  #EEF2FF;
  --primary-100: #E0E7FF;
  --primary-200: #C7D2FE;
  --primary-300: #A5B4FC;
  --primary-400: #818CF8;
  --primary-500: #6366F1;
  --primary-600: #4F46E5;
  --primary-700: #4338CA;
  --primary-800: #3730A3;
  --primary-900: #312E81;

  /* Semantic Colors */
  --success:       #10B981;
  --success-bg:    #D1FAE5;
  --warning:       #F59E0B;
  --warning-bg:    #FEF3C7;
  --danger:        #EF4444;
  --danger-bg:     #FEE2E2;
  --info:          #06B6D4;
  --info-bg:       #CFFAFE;

  /* Grays */
  --gray-50:  #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;

  /* Surfaces */
  --bg-body:     #F0F2F7;
  --bg-surface:  #FFFFFF;
  --border:      #E2E8F0;

  /* Sidebar */
  --sidebar-bg:          #1A1B3A;
  --sidebar-width:       260px;
  --sidebar-hover:       rgba(255,255,255,0.07);
  --sidebar-active-bg:   rgba(99,102,241,0.20);
  --sidebar-active-text: #FFFFFF;
  --sidebar-text:        #A5B4FC;
  --sidebar-muted:       #6366F1;

  /* Text */
  --text-primary:   var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-muted:     var(--gray-400);
  --text-inverse:   #FFFFFF;

  /* Layout */
  --header-height: 64px;
  --content-padding: 28px;

  /* Spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;

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

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 24px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.06);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.12);

  /* Transition */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;
  --t-slow: 400ms ease;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 0.933rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover { color: var(--primary-700); }

img { max-width: 100%; height: auto; }

ul, ol { list-style: none; }

/* ============================================================
   Splash Screen
   ============================================================ */
#splash-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #1A1B3A 0%, #312E81 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}
#splash-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}
.splash-content {
  text-align: center;
}
.splash-logo {
  width: 80px; height: 80px;
  background: rgba(255,255,255,0.12);
  border-radius: var(--r-xl);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
}
.splash-logo i {
  font-size: 2.2rem;
  color: #818CF8;
}
.splash-title {
  color: #FFFFFF;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: var(--sp-6);
  letter-spacing: -0.02em;
}
.splash-spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(255,255,255,0.15);
  border-top-color: #6366F1;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

/* ============================================================
   App Layout
   ============================================================ */
#app-layout {
  display: flex;
  min-height: 100vh;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--t-base);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-6) var(--sp-5);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  min-height: 72px;
}
.sidebar-brand-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}
.sidebar-brand-icon i { color: white; font-size: 1rem; }
.sidebar-brand-text { overflow: hidden; }
.sidebar-brand-name {
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.88rem;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-brand-sub {
  color: var(--sidebar-text);
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.7;
}

.sidebar-nav {
  flex: 1;
  padding: var(--sp-4) var(--sp-3);
}
.sidebar-section-label {
  color: var(--sidebar-muted);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--sp-4) var(--sp-3) var(--sp-2);
  opacity: 0.7;
}
.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 10px var(--sp-3);
  border-radius: var(--r-md);
  color: var(--sidebar-text);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  margin-bottom: 2px;
  user-select: none;
}
.sidebar-item:hover {
  background: var(--sidebar-hover);
  color: #FFFFFF;
}
.sidebar-item.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
  border-left: 3px solid var(--primary-500);
  padding-left: calc(var(--sp-3) - 3px);
}
.sidebar-item i {
  width: 18px;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.8;
  flex-shrink: 0;
}
.sidebar-item.active i { opacity: 1; color: var(--primary-300); }
.sidebar-item-badge {
  margin-left: auto;
  background: var(--danger);
  color: white;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--r-full);
  min-width: 18px;
  text-align: center;
}

.sidebar-footer {
  padding: var(--sp-4) var(--sp-3);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background var(--t-fast);
}
.sidebar-user:hover { background: var(--sidebar-hover); }
.sidebar-user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-700));
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 0.9rem;
  font-weight: 600;
  flex-shrink: 0;
}
.sidebar-user-name {
  color: #FFFFFF;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-role {
  color: var(--sidebar-text);
  font-size: 0.72rem;
  opacity: 0.8;
}
.sidebar-user-logout {
  margin-left: auto;
  color: var(--sidebar-text);
  font-size: 0.85rem;
  opacity: 0.6;
  flex-shrink: 0;
  transition: opacity var(--t-fast), color var(--t-fast);
}
.sidebar-user:hover .sidebar-user-logout {
  opacity: 1;
  color: var(--danger);
}

/* ============================================================
   Main Content Area
   ============================================================ */
.main-area {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

/* ============================================================
   Header
   ============================================================ */
.app-header {
  height: var(--header-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 var(--content-padding);
  gap: var(--sp-4);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.header-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: var(--sp-2);
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
}
.header-toggle:hover { background: var(--gray-100); }
.header-breadcrumb {
  flex: 1;
}
.header-page-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}
.header-breadcrumb-path {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.header-btn {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: all var(--t-fast);
  position: relative;
}
.header-btn:hover { background: var(--gray-100); border-color: var(--gray-300); }
.header-user-chip {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  cursor: pointer;
  background: var(--bg-surface);
  transition: all var(--t-fast);
}
.header-user-chip:hover { background: var(--gray-100); }
.header-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-700));
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
}
.header-user-name {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-primary);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   Page Content
   ============================================================ */
.page-content {
  flex: 1;
  padding: var(--content-padding);
  animation: fadeIn 0.3s ease;
}

/* ============================================================
   Page Header
   ============================================================ */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}
.page-header-left h1 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.page-header-left p {
  color: var(--text-secondary);
  margin-top: var(--sp-1);
  font-size: 0.88rem;
}
.page-header-right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}
.card-title {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--text-primary);
}
.card-body { padding: var(--sp-6); }
.card-footer {
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--border);
  background: var(--gray-50);
}

/* Stat Cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sp-5);
  margin-bottom: var(--sp-6);
}
.stat-card {
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  padding: var(--sp-5) var(--sp-6);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  cursor: default;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.stat-icon {
  width: 52px; height: 52px;
  border-radius: var(--r-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.stat-icon.indigo  { background: var(--primary-50); color: var(--primary-600); }
.stat-icon.green   { background: var(--success-bg); color: var(--success); }
.stat-icon.amber   { background: var(--warning-bg); color: var(--warning); }
.stat-icon.cyan    { background: var(--info-bg);    color: var(--info); }
.stat-icon.red     { background: var(--danger-bg);  color: var(--danger); }
.stat-info {}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.stat-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 9px 18px;
  border-radius: var(--r-md);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
  line-height: 1;
}
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.btn i { font-size: 0.85rem; }

.btn-primary {
  background: var(--primary-600);
  color: white;
  border-color: var(--primary-600);
  box-shadow: 0 2px 6px rgba(79,70,229,0.35);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary-700);
  border-color: var(--primary-700);
  box-shadow: 0 4px 12px rgba(79,70,229,0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--gray-100);
  border-color: var(--gray-300);
}

.btn-success {
  background: var(--success);
  color: white;
  border-color: var(--success);
  box-shadow: 0 2px 6px rgba(16,185,129,0.3);
}
.btn-success:hover:not(:disabled) {
  background: #059669;
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
  box-shadow: 0 2px 6px rgba(239,68,68,0.3);
}
.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  transform: translateY(-1px);
}

.btn-warning {
  background: var(--warning);
  color: white;
  border-color: var(--warning);
}
.btn-warning:hover:not(:disabled) {
  background: #D97706;
  transform: translateY(-1px);
}

.btn-info {
  background: var(--info);
  color: white;
  border-color: var(--info);
}
.btn-info:hover:not(:disabled) {
  background: #0891B2;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}
.btn-lg {
  padding: 12px 24px;
  font-size: 0.95rem;
}
.btn-icon {
  width: 36px; height: 36px;
  padding: 0;
  border-radius: var(--r-md);
  justify-content: center;
}

/* Action Buttons in table rows */
.action-btns {
  display: flex;
  gap: var(--sp-2);
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  margin-bottom: var(--sp-5);
}
.form-label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--sp-2);
}
.form-label .required { color: var(--danger); margin-left: 2px; }
.form-control {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--text-primary);
  background: var(--bg-surface);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
  line-height: 1.5;
}
.form-control:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.form-control:disabled {
  background: var(--gray-100);
  color: var(--text-muted);
  cursor: not-allowed;
}
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
textarea.form-control {
  resize: vertical;
  min-height: 100px;
}
.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--sp-1);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-5);
}
.form-row-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

/* Radio & Checkbox */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  cursor: pointer;
}
.form-check input { cursor: pointer; accent-color: var(--primary-600); }
.form-check-label { font-size: 0.88rem; }

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--r-full);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-primary { background: var(--primary-100); color: var(--primary-700); }
.badge-success { background: var(--success-bg);  color: #065F46; }
.badge-warning { background: var(--warning-bg);  color: #92400E; }
.badge-danger  { background: var(--danger-bg);   color: #991B1B; }
.badge-info    { background: var(--info-bg);     color: #164E63; }
.badge-gray    { background: var(--gray-100);    color: var(--gray-600); }

/* ============================================================
   DataTables Overrides
   ============================================================ */
.dataTables_wrapper {
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  overflow-x: auto;
}
.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--t-fast);
}
.dataTables_wrapper .dataTables_filter input:focus,
.dataTables_wrapper .dataTables_length select:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.dataTables_wrapper .dataTables_filter label,
.dataTables_wrapper .dataTables_length label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
table.dataTable {
  width: 100% !important;
  border-collapse: collapse;
}
table.dataTable thead th {
  background: var(--gray-50);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 12px 16px;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
table.dataTable tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--text-primary);
  vertical-align: middle;
}
table.dataTable tbody tr:last-child td { border-bottom: none; }
table.dataTable tbody tr:hover td { background: var(--primary-50); }
.dataTables_wrapper .dataTables_info { color: var(--text-muted); font-size: 0.8rem; }
.dataTables_wrapper .dataTables_paginate .paginate_button {
  padding: 5px 10px;
  border-radius: var(--r-sm);
  font-size: 0.82rem;
  margin: 0 2px;
  cursor: pointer;
  transition: background var(--t-fast);
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
  background: var(--primary-600) !important;
  color: white !important;
  border: 1px solid var(--primary-600) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover:not(.current) {
  background: var(--gray-100) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border) !important;
}

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-5);
  animation: fadeIn 0.2s ease;
}
.modal-overlay.closing { animation: fadeOut 0.2s ease forwards; }
.modal {
  background: var(--bg-surface);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.25s ease;
  overflow: hidden;
}
.modal-lg { max-width: 760px; }
.modal-xl { max-width: 960px; }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-6);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.modal-close {
  width: 32px; height: 32px;
  border: none;
  background: var(--gray-100);
  border-radius: var(--r-full);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: all var(--t-fast);
}
.modal-close:hover { background: var(--gray-200); color: var(--text-primary); }
.modal-body {
  padding: var(--sp-6);
  overflow-y: auto;
  flex: 1;
}
.modal-footer {
  padding: var(--sp-4) var(--sp-6);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--sp-3);
  justify-content: flex-end;
  flex-shrink: 0;
  background: var(--gray-50);
}

/* ============================================================
   Toast Notifications
   ============================================================ */
#toast-container {
  position: fixed;
  top: var(--sp-5);
  right: var(--sp-5);
  z-index: 9000;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  background: var(--bg-surface);
  border-radius: var(--r-lg);
  padding: var(--sp-4) var(--sp-5);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  min-width: 300px;
  max-width: 420px;
  pointer-events: all;
  animation: toastIn 0.3s ease;
  border-left: 4px solid var(--primary-500);
}
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
.toast-icon {
  width: 20px; height: 20px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  margin-top: 1px;
}
.toast.success .toast-icon { color: var(--success); }
.toast.error   .toast-icon { color: var(--danger); }
.toast.warning .toast-icon { color: var(--warning); }
.toast.info    .toast-icon { color: var(--info); }
.toast-content {}
.toast-title { font-size: 0.88rem; font-weight: 700; color: var(--text-primary); }
.toast-msg   { font-size: 0.82rem; color: var(--text-secondary); margin-top: 2px; }
.toast-dismiss {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 2px;
  transition: color var(--t-fast);
  flex-shrink: 0;
}
.toast-dismiss:hover { color: var(--text-primary); }
.toast.hiding { animation: toastOut 0.3s ease forwards; }

/* ============================================================
   Table Toolbar
   ============================================================ */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
  margin-bottom: var(--sp-4);
}
.table-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}
.table-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.filter-select {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  outline: none;
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--t-fast);
}
.filter-select:focus { border-color: var(--primary-500); }

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
}
.empty-state-icon {
  width: 64px; height: 64px;
  background: var(--gray-100);
  border-radius: var(--r-xl);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  color: var(--text-muted);
  margin-bottom: var(--sp-4);
}
.empty-state h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.empty-state p { font-size: 0.85rem; color: var(--text-muted); margin-top: var(--sp-2); }

/* ============================================================
   Quill Editor
   ============================================================ */
.ql-container {
  border-radius: 0 0 var(--r-md) var(--r-md);
  border-color: var(--border) !important;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  min-height: 200px;
}
.ql-toolbar {
  border-radius: var(--r-md) var(--r-md) 0 0;
  border-color: var(--border) !important;
  background: var(--gray-50);
}
.ql-editor { min-height: 180px; }

/* ============================================================
   File Upload
   ============================================================ */
.file-upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-8) var(--sp-6);
  text-align: center;
  cursor: pointer;
  transition: all var(--t-fast);
  background: var(--gray-50);
}
.file-upload-zone:hover,
.file-upload-zone.drag-over {
  border-color: var(--primary-400);
  background: var(--primary-50);
}
.file-upload-zone i {
  font-size: 2rem;
  color: var(--text-muted);
  margin-bottom: var(--sp-3);
  display: block;
}
.file-upload-zone p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}
.file-upload-zone span { color: var(--primary-600); font-weight: 600; }
.file-info {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  background: var(--primary-50);
  border: 1px solid var(--primary-200);
  border-radius: var(--r-md);
  margin-top: var(--sp-3);
}
.file-info i { color: var(--primary-600); }
.file-info-name { font-size: 0.85rem; font-weight: 600; color: var(--primary-700); }
.file-info-size { font-size: 0.75rem; color: var(--text-muted); }
.file-info-remove {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  padding: 2px;
  font-size: 0.85rem;
}

/* ============================================================
   Progress Bar
   ============================================================ */
.progress {
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--r-full);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--primary-600));
  border-radius: var(--r-full);
  transition: width 0.3s ease;
}

/* ============================================================
   Tabs
   ============================================================ */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--border);
  gap: 0;
  margin-bottom: var(--sp-6);
}
.tab-btn {
  padding: var(--sp-3) var(--sp-5);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--t-fast);
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: 'Inter', sans-serif;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--primary-600); border-bottom-color: var(--primary-600); }

/* ============================================================
   Avatar colors
   ============================================================ */
.avatar-sm {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-700));
  color: white;
  flex-shrink: 0;
}

/* ============================================================
   Alert boxes
   ============================================================ */
.alert {
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  font-size: 0.88rem;
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  border-left: 4px solid;
}
.alert-info    { background: var(--info-bg);    border-color: var(--info);    color: #164E63; }
.alert-success { background: var(--success-bg); border-color: var(--success); color: #065F46; }
.alert-warning { background: var(--warning-bg); border-color: var(--warning); color: #92400E; }
.alert-danger  { background: var(--danger-bg);  border-color: var(--danger);  color: #991B1B; }

/* ============================================================
   Login Page
   ============================================================ */
#login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1A1B3A 0%, #312E81 50%, #1A1B3A 100%);
  position: relative;
  overflow: hidden;
}
#login-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(99,102,241,0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(6,182,212,0.15) 0%, transparent 50%);
}
.login-card {
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-xl);
  padding: var(--sp-10);
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
  animation: slideUp 0.4s ease;
}
.login-logo {
  text-align: center;
  margin-bottom: var(--sp-8);
}
.login-logo-icon {
  width: 70px; height: 70px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  border-radius: var(--r-xl);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-4);
  box-shadow: 0 8px 24px rgba(99,102,241,0.5);
}
.login-logo-icon i { font-size: 1.8rem; color: white; }
.login-school-name {
  color: white;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.login-subtitle {
  color: rgba(255,255,255,0.55);
  font-size: 0.82rem;
  margin-top: 4px;
}
.login-form-title {
  color: white;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: var(--sp-2);
}
.login-form-sub {
  color: rgba(255,255,255,0.55);
  font-size: 0.83rem;
  margin-bottom: var(--sp-6);
}
.login-card .form-label { color: rgba(255,255,255,0.8); }
.login-card .form-control {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.12);
  color: white;
}
.login-card .form-control::placeholder { color: rgba(255,255,255,0.35); }
.login-card .form-control:focus {
  background: rgba(255,255,255,0.12);
  border-color: var(--primary-400);
}
.login-btn {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  color: white;
  border: none;
  border-radius: var(--r-md);
  font-size: 0.95rem;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all var(--t-fast);
  box-shadow: 0 4px 16px rgba(99,102,241,0.4);
  margin-top: var(--sp-4);
}
.login-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.5);
}
.login-btn:disabled { opacity: 0.7; cursor: not-allowed; }
.login-error {
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.3);
  color: #FCA5A5;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  font-size: 0.83rem;
  margin-top: var(--sp-4);
  display: none;
}
.login-error.show { display: block; }
.login-footer {
  text-align: center;
  margin-top: var(--sp-6);
  color: rgba(255,255,255,0.35);
  font-size: 0.75rem;
}

/* ============================================================
   Attendance Status Colors
   ============================================================ */
.status-hadir  { background: var(--success-bg);  color: #065F46; }
.status-izin   { background: var(--info-bg);      color: #164E63; }
.status-sakit  { background: var(--warning-bg);   color: #92400E; }
.status-alpa   { background: var(--danger-bg);    color: #991B1B; }

/* ============================================================
   Grade Score coloring
   ============================================================ */
.score-high   { color: var(--success); font-weight: 700; }
.score-mid    { color: var(--warning); font-weight: 700; }
.score-low    { color: var(--danger);  font-weight: 700; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    width: 260px;
    z-index: 200;
  }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-xl); }
  .main-area { margin-left: 0; }
  .header-toggle { display: flex; }
}

@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
  .form-row-3 { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .page-header { flex-direction: column; }
  .page-content { padding: 16px; }
  :root { --content-padding: 16px; }
}

@media (max-width: 480px) {
  .stat-grid { grid-template-columns: 1fr; }
  .login-card { padding: var(--sp-6); }
  .modal { border-radius: var(--r-lg) var(--r-lg) 0 0; margin-top: auto; }
}

/* Mobile overlay for sidebar */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 150;
}
.sidebar-overlay.show { display: block; }

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(30px); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.2s ease infinite;
  border-radius: var(--r-sm);
}
@keyframes skeleton-loading {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Loader spinner */
.loader {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-10);
}
.loader-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-600);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ============================================================
   Utility classes
   ============================================================ */
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.mt-4  { margin-top: var(--sp-4); }
.mt-6  { margin-top: var(--sp-6); }
.mb-4  { margin-bottom: var(--sp-4); }
.mb-6  { margin-bottom: var(--sp-6); }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--text-muted); }
.text-sm { font-size: 0.82rem; }
.fw-bold { font-weight: 700; }
.w-100 { width: 100%; }
.flex-1 { flex: 1; }

/* ============================================================
   Login Page
   ============================================================ */
#login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, #1A1B3A 0%, #2D2F6B 40%, #1A1B3A 100%);
  display: flex; align-items: center; justify-content: center;
  padding: 24px; position: relative; overflow: hidden;
}
#login-page::before {
  content: '';
  position: absolute; top: -200px; right: -200px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.3), transparent);
  pointer-events: none;
}
.login-card {
  background: rgba(255,255,255,0.07);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px; padding: 40px;
  width: 100%; max-width: 440px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  animation: slideUp 0.5s cubic-bezier(0.16,1,0.3,1) both;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo-icon {
  width: 72px; height: 72px; border-radius: 20px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: white; margin: 0 auto 16px;
  box-shadow: 0 12px 30px rgba(99,102,241,0.4);
}
.login-school-name { font-size: 1.2rem; font-weight: 800; color: white; letter-spacing: -0.02em; }
.login-subtitle { font-size: 0.82rem; color: rgba(255,255,255,0.55); margin-top: 4px; }
.login-form-title { font-size: 1.4rem; font-weight: 800; color: white; margin-bottom: 4px; }
.login-form-sub { font-size: 0.83rem; color: rgba(255,255,255,0.5); margin-bottom: 24px; }
#login-page .form-label { color: rgba(255,255,255,0.75); }
#login-page .form-control {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.15); color: white;
}
#login-page .form-control::placeholder { color: rgba(255,255,255,0.35); }
#login-page .form-control:focus {
  background: rgba(255,255,255,0.15);
  border-color: rgba(99,102,241,0.7);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}
.login-error {
  color: #FCA5A5; font-size: 0.83rem; padding: 8px 12px;
  background: rgba(239,68,68,0.15); border-radius: 8px;
  border: 1px solid rgba(239,68,68,0.3); margin-bottom: 16px; display: none;
}
.login-error.show { display: block; }
.login-btn {
  width: 100%; padding: 13px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  border: none; border-radius: 10px; color: white; font-weight: 700;
  font-size: 0.95rem; cursor: pointer; transition: all 0.2s;
  box-shadow: 0 4px 15px rgba(99,102,241,0.4); margin-top: 8px;
}
.login-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(99,102,241,0.5); }
.login-btn:disabled { opacity: 0.6; transform: none; cursor: not-allowed; }
.login-footer { text-align: center; margin-top: 28px; font-size: 0.75rem; color: rgba(255,255,255,0.3); }

/* ============================================================
   Stats Grid
   ============================================================ */
.stat-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-surface); border-radius: var(--r-md);
  padding: 20px; display: flex; align-items: flex-start; gap: 16px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1.2rem;
}
.stat-icon.indigo { background: #EEF2FF; color: #4F46E5; }
.stat-icon.green  { background: #D1FAE5; color: #059669; }
.stat-icon.amber  { background: #FEF3C7; color: #D97706; }
.stat-icon.cyan   { background: #CFFAFE; color: #0891B2; }
.stat-icon.red    { background: #FEE2E2; color: #DC2626; }
.stat-info { flex: 1; }
.stat-label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 1.9rem; font-weight: 800; color: var(--text-primary); line-height: 1.1; margin-top: 4px; }
.stat-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.score-high { color: var(--success) !important; font-weight: 700; }
.score-mid  { color: var(--warning) !important; font-weight: 700; }
.score-low  { color: var(--danger)  !important; font-weight: 700; }

/* ============================================================
   Tabs
   ============================================================ */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 18px; background: none; border: none;
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  font-size: 0.88rem; font-weight: 600; color: var(--text-muted);
  cursor: pointer; border-radius: 6px 6px 0 0; transition: all 0.2s;
  display: flex; align-items: center; gap: 8px;
}
.tab-btn:hover { color: var(--primary-600); background: var(--primary-50); }
.tab-btn.active { color: var(--primary-600); border-bottom-color: var(--primary-600); background: var(--primary-50); }

/* ============================================================
   File Upload Zone
   ============================================================ */
.file-upload-zone {
  border: 2px dashed var(--border); border-radius: var(--r-md);
  padding: 32px; text-align: center; cursor: pointer;
  transition: all 0.2s; color: var(--text-muted);
}
.file-upload-zone:hover { border-color: var(--primary-400); background: var(--primary-50); color: var(--primary-600); }
.file-upload-zone i { font-size: 2rem; display: block; margin-bottom: 10px; }
.file-upload-zone p { font-size: 0.88rem; margin: 0; }
.file-upload-zone span { color: var(--primary-600); font-weight: 600; }
.file-info {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--gray-50);
  border-radius: var(--r-sm); border: 1px solid var(--border); margin-top: 12px;
}
.file-info i { font-size: 1.4rem; }
.file-info-name { font-size: 0.88rem; font-weight: 600; }
.file-info-size { font-size: 0.75rem; color: var(--text-muted); }

/* Action Buttons, Avatars, Misc */
.action-btns { display: flex; gap: 6px; flex-wrap: nowrap; }
.avatar-sm {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-400), var(--primary-700));
  color: white; font-size: 0.75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; text-transform: uppercase;
}
.card-footer {
  padding: 12px 20px; border-top: 1px solid var(--border);
  background: var(--gray-50); border-radius: 0 0 var(--r-md) var(--r-md);
  display: flex; align-items: center;
}
.form-check { display: flex; align-items: center; gap: 5px; cursor: pointer; }
.form-check input[type="radio"] { width: 14px; height: 14px; accent-color: var(--primary-600); cursor: pointer; }
.table-toolbar { display: flex; align-items: center; justify-content: flex-end; gap: 8px; margin-bottom: 16px; }
.btn-ghost {
  background: none; border: 1px solid var(--border); color: var(--text-secondary);
  padding: 6px 14px; border-radius: var(--r-sm); font-size: 0.82rem;
  cursor: pointer; font-weight: 500; transition: all 0.15s;
}
.btn-ghost:hover { background: var(--gray-100); color: var(--primary-600); }
.badge-info { background: #E0F7FA; color: #006064; }
.badge-gray { background: var(--gray-100); color: var(--gray-700); }
.required { color: var(--danger); }

.mobile-only { display: none !important; }

@media (max-width: 900px) { .stat-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 768px) {
  .mobile-only { display: inline-block !important; }
  .desktop-only, .hide-on-mobile { display: none !important; }
}
@media (max-width: 600px) { .stat-grid { grid-template-columns: 1fr; } .login-card { padding: 28px 20px; } }