/* ==========================================================================
   StudyFlow Admin - Super Admin & Teacher Portal Dashboard
   Pure HTML5 & CSS3 (Zero JavaScript)
   ========================================================================== */

/* --- CSS Variables & Theming System --- */
:root {
  /* Brand Palette */
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #e0e7ff;
  --primary-glow: rgba(79, 70, 229, 0.28);
  
  --secondary: #0ea5e9;
  --secondary-light: #e0f2fe;

  --success: #10b981;
  --success-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;

  /* Surfaces & Backgrounds */
  --bg-body: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.90);
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  /* Transitions */
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   PURE CSS DARK MODE OVERRIDES
   ========================================================================== */
#theme-toggle:checked ~ .admin-layout,
#theme-toggle:checked ~ .modal-overlay {
  --bg-body: #0b0f19;
  --bg-sidebar: #101726;
  --bg-card: #131b2e;
  --bg-card-subtle: #1e293b;
  --bg-glass: rgba(19, 27, 46, 0.92);
  --border-color: #24324c;
  --border-hover: #374768;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --primary-light: rgba(79, 70, 229, 0.22);
  --secondary-light: rgba(14, 165, 233, 0.2);
  --success-light: rgba(16, 185, 129, 0.18);
  --warning-light: rgba(245, 158, 11, 0.18);
  --danger-light: rgba(239, 68, 68, 0.2);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.45);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Hidden off-screen controllers */
.css-controller {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  z-index: -999;
}

/* ==========================================================================
   ADMIN LAYOUT STRUCTURE (Sidebar + Content Workspace)
   ========================================================================== */
.admin-layout {
  display: flex;
  min-height: 100vh;
  background-color: var(--bg-body);
}

/* SIDEBAR */
.admin-sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  flex-shrink: 0;
  z-index: 40;
  transition: var(--transition);
}

.sidebar-brand {
  padding: 1.5rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
  flex-shrink: 0;
}

.brand-icon svg {
  width: 22px;
  height: 22px;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-role {
  font-size: 0.65rem;
  font-weight: 800;
  background-color: var(--danger);
  color: #ffffff;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-tagline {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Switch link back to Student Portal */
.sidebar-quick-switch {
  padding: 0.85rem 1.4rem;
  border-bottom: 1px solid var(--border-color);
}

.portal-switch-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--primary);
  text-decoration: none;
  font-size: 0.825rem;
  font-weight: 700;
  transition: var(--transition);
}

.portal-switch-link:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.portal-switch-link svg {
  width: 16px;
  height: 16px;
}

.badge-ext {
  font-size: 0.65rem;
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}

/* Sidebar Nav Items */
.sidebar-nav {
  flex: 1;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-subtle);
  padding: 0.5rem 0.65rem;
  margin-top: 0.4rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
  position: relative;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.nav-item:hover {
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
}

.nav-badge {
  margin-left: auto;
  font-size: 0.725rem;
  font-weight: 700;
  background-color: var(--bg-card-subtle);
  color: var(--text-muted);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
}

.alert-badge {
  background-color: var(--danger-light);
  color: var(--danger);
  border-color: var(--danger);
}

/* User Profile in Sidebar Bottom */
.sidebar-user-footer {
  padding: 1rem 1.4rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-card-subtle);
}

.admin-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #4f46e5 0%, #a855f7 100%);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

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

.admin-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.admin-role-title {
  font-size: 0.725rem;
  color: var(--text-muted);
}

/* ==========================================================================
   PURE CSS TAB SWITCHING LOGIC
   ========================================================================== */
.panel-section {
  display: none;
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

#tab-overview:checked ~ .admin-layout #panel-overview { display: block; }
#tab-tasks:checked ~ .admin-layout #panel-tasks { display: block; }
#tab-students:checked ~ .admin-layout #panel-students { display: block; }
#tab-subjects:checked ~ .admin-layout #panel-subjects { display: block; }
#tab-broadcast:checked ~ .admin-layout #panel-broadcast { display: block; }
#tab-settings:checked ~ .admin-layout #panel-settings { display: block; }

/* Active Sidebar Navigation Item */
#tab-overview:checked ~ .admin-layout .nav-overview,
#tab-tasks:checked ~ .admin-layout .nav-tasks,
#tab-students:checked ~ .admin-layout .nav-students,
#tab-subjects:checked ~ .admin-layout .nav-subjects,
#tab-broadcast:checked ~ .admin-layout .nav-broadcast,
#tab-settings:checked ~ .admin-layout .nav-settings {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

#tab-overview:checked ~ .admin-layout .nav-overview .nav-badge,
#tab-tasks:checked ~ .admin-layout .nav-tasks .nav-badge {
  background-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-color: transparent;
}

/* ==========================================================================
   MAIN CONTENT WORKSPACE
   ========================================================================== */
.admin-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* TOPBAR */
.admin-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background-color: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.topbar-search {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  width: 100%;
  max-width: 480px;
}

.topbar-search svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.search-input {
  border: none;
  background: transparent;
  outline: none;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-main);
  width: 100%;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

.topbar-chip {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 2px var(--success-light);
}

.theme-switch-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.theme-switch-btn:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.theme-switch-btn svg {
  width: 18px;
  height: 18px;
}

.icon-sun { display: inline-flex; color: #f59e0b; }
.icon-moon { display: none; color: #818cf8; }

#theme-toggle:checked ~ .admin-layout .icon-sun { display: none; }
#theme-toggle:checked ~ .admin-layout .icon-moon { display: inline-flex; }

/* Global Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
  background-color: #dc2626;
  transform: translateY(-1px);
}

.btn-danger-outline {
  background-color: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}

.btn-danger-outline:hover:not(:disabled) {
  background-color: var(--danger);
  color: #ffffff;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.28);
}

.btn-white {
  background-color: #ffffff;
  color: var(--primary);
}

.btn-white:hover {
  background-color: #f8fafc;
  transform: translateY(-1px);
}

/* ==========================================================================
   PANEL CONTENT PADDING & HEADINGS
   ========================================================================== */
.panel-section {
  padding: 2rem;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.section-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
}

.section-btn-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.section-sub {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Welcome Card in Overview */
.admin-welcome-card {
  background: linear-gradient(135deg, #3730a3 0%, #4f46e5 50%, #0284c7 100%);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.4);
  margin-bottom: 1.75rem;
  position: relative;
  overflow: hidden;
}

.admin-welcome-card::after {
  content: '';
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.welcome-left {
  max-width: 680px;
  position: relative;
  z-index: 2;
}

.badge-pill {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
}

.welcome-heading {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.welcome-sub {
  font-size: 0.925rem;
  opacity: 0.92;
  line-height: 1.6;
}

.welcome-actions {
  display: flex;
  gap: 0.75rem;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

/* 4 Overview KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.kpi-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  align-items: flex-start;
  gap: 1.15rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.kpi-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kpi-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.bg-indigo { background-color: var(--primary-light); color: var(--primary); }
.bg-blue { background-color: var(--secondary-light); color: var(--secondary); }
.bg-emerald { background-color: var(--success-light); color: var(--success); }
.bg-rose { background-color: var(--danger-light); color: var(--danger); }
.bg-purple { background-color: #f3e8ff; color: #9333ea; }
.bg-amber { background-color: var(--warning-light); color: var(--warning); }

.kpi-info {
  display: flex;
  flex-direction: column;
}

.kpi-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  margin: 0.2rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.kpi-growth {
  font-size: 0.725rem;
  font-weight: 700;
}

.kpi-footnote {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-primary { color: var(--primary) !important; }
.text-warning { color: var(--warning) !important; }

/* Analytics 2-Column Row (Pure CSS Bar Chart + Activity) */
.analytics-row {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.5rem;
}

.chart-card,
.activity-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
}

.card-subtitle {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.pill-sm {
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

/* ==========================================================================
   PURE CSS BAR CHART COMPONENT
   ========================================================================== */
.css-barchart {
  height: 220px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-top: auto;
}

.barchart-col {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 0.65rem;
}

.bar-track {
  width: 100%;
  max-width: 42px;
  height: 180px;
  background-color: var(--bg-card-subtle);
  border-radius: 8px 8px 0 0;
  display: flex;
  align-items: flex-end;
  position: relative;
}

.bar-fill {
  width: 100%;
  background: linear-gradient(180deg, #6366f1 0%, #4f46e5 100%);
  border-radius: 8px 8px 0 0;
  transition: height 0.4s ease;
  position: relative;
  cursor: pointer;
}

.bar-fill:hover {
  background: linear-gradient(180deg, #4338ca 0%, #3730a3 100%);
}

.bar-tooltip {
  position: absolute;
  top: -26px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--text-main);
  color: var(--bg-card);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  pointer-events: none;
}

.bar-label {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.15rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.dot-legend {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.bg-info { background-color: var(--secondary); }

/* Activity Timeline */
.activity-timeline {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.timeline-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 0.35rem;
  flex-shrink: 0;
}

.timeline-body {
  flex: 1;
}

.timeline-text {
  font-size: 0.825rem;
  color: var(--text-main);
  line-height: 1.45;
}

.timeline-time {
  font-size: 0.725rem;
  color: var(--text-subtle);
  margin-top: 0.2rem;
  display: block;
}

/* ==========================================================================
   TASK MANAGER TABLE (Panel 2)
   ========================================================================== */
.table-filter-bar {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.th-checkbox-label,
.row-chk-wrap {
  position: relative;
  display: inline-flex;
  width: 18px;
  height: 18px;
  cursor: pointer;
  vertical-align: middle;
}

.th-checkbox-label input,
.row-chk-wrap input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 1;
}

.custom-chk-sm {
  display: inline-flex;
  width: 18px;
  height: 18px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color-hover);
  border-radius: 4px;
  background-color: var(--bg-card);
  color: transparent;
  transition: var(--transition);
}

.th-checkbox-label input:checked + .custom-chk-sm,
.row-chk-wrap input:checked + .custom-chk-sm {
  border-color: var(--primary);
  background-color: var(--primary);
  color: #ffffff;
}

.th-checkbox-label input:checked + .custom-chk-sm::after,
.row-chk-wrap input:checked + .custom-chk-sm::after {
  content: "✓";
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
}

.th-checkbox-label input:focus-visible + .custom-chk-sm,
.row-chk-wrap input:focus-visible + .custom-chk-sm {
  outline: 3px solid var(--primary-glow);
  outline-offset: 2px;
}

.filter-radio-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-caption {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-right: 0.35rem;
}

.tbl-filter-pill {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-card-subtle);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}

.tbl-filter-pill:hover {
  background-color: var(--border-color);
  color: var(--text-main);
}

/* PURE CSS TABLE FILTER LOGIC */
#tbl-all:checked ~ .admin-layout .filter-tbl-all,
#tbl-mipa1:checked ~ .admin-layout .filter-tbl-mipa1,
#tbl-mipa2:checked ~ .admin-layout .filter-tbl-mipa2,
#tbl-ips1:checked ~ .admin-layout .filter-tbl-ips1 {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

#tbl-mipa1:checked ~ .admin-layout tbody tr:not(.row-mipa1) { display: none !important; }
#tbl-mipa2:checked ~ .admin-layout tbody tr:not(.row-mipa2) { display: none !important; }
#tbl-ips1:checked ~ .admin-layout tbody tr:not(.row-ips1) { display: none !important; }

/* PURE CSS ROW DISMISS / DELETION */
#del-row-1:checked ~ .admin-layout #admin-row-1,
#del-row-2:checked ~ .admin-layout #admin-row-2,
#del-row-3:checked ~ .admin-layout #admin-row-3,
#del-row-4:checked ~ .admin-layout #admin-row-4,
#del-row-5:checked ~ .admin-layout #admin-row-5,
#del-row-6:checked ~ .admin-layout #admin-row-6,
#del-row-7:checked ~ .admin-layout #admin-row-7 {
  display: none !important;
}

/* TABLE STYLING */
.table-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.table-header-box {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.admin-data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.admin-data-table th {
  background-color: var(--bg-card-subtle);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.725rem;
  letter-spacing: 0.04em;
  padding: 0.95rem 1.15rem;
  border-bottom: 1px solid var(--border-color);
}

.admin-data-table td {
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}

.admin-data-table tbody tr:hover {
  background-color: var(--bg-card-subtle);
}

.table-task-name {
  font-weight: 700;
  color: var(--text-main);
}

.table-task-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.badge-subject-sm {
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.table-teacher {
  font-size: 0.725rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.class-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  width: 120px;
}

.progress-bar-sm {
  width: 100%;
  height: 6px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.fill-bar {
  height: 100%;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

.progress-text {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
}

.p-badge-sm {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.p-high { background-color: var(--danger-light); color: var(--danger); }
.p-med { background-color: var(--warning-light); color: var(--warning); }
.p-low { background-color: var(--success-light); color: var(--success); }

.status-badge-sm {
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.status-active {
  background-color: var(--success-light);
  color: var(--success);
}

.btn-action-icon {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-action-icon svg {
  width: 16px;
  height: 16px;
}

.btn-action-icon:hover {
  background-color: var(--danger-light);
  transform: scale(1.1);
}

/* ==========================================================================
   PANEL 3: SISWA & KELAS (STUDENTS & MONITORING)
   ========================================================================== */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.class-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  transition: var(--transition);
}

.class-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.class-card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.class-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  color: #ffffff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.class-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
}

.class-wali {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.class-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  background-color: var(--bg-card-subtle);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}

.c-metric {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.c-label {
  font-size: 0.675rem;
  font-weight: 600;
  color: var(--text-muted);
}

.c-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 0.15rem;
}

.badge-status-green {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--success);
}

.badge-status-yellow {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--warning);
}

.mt-4 { margin-top: 1.5rem; }

/* ==========================================================================
   PANEL 4: MATA PELAJARAN (SUBJECTS)
   ========================================================================== */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.subject-form {
  display: grid;
  grid-template-columns: 2fr 2fr 0.8fr auto;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding: 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.subject-form[hidden] {
  display: none;
}

.subject-form .form-group {
  margin: 0;
}

.subject-form-actions {
  display: flex;
  gap: 0.5rem;
  padding-bottom: 1px;
}

.btn-light {
  background-color: var(--bg-card-subtle);
  color: var(--text-main);
}

.btn-light:hover {
  background-color: var(--border-color);
}

.subject-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.s-card-top {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.subject-card-info {
  min-width: 0;
  flex: 1;
}

.subject-delete-button {
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--danger-border);
  border-radius: var(--radius-sm);
  background-color: var(--danger-light);
  color: var(--danger);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
}

.subject-delete-button:hover {
  background-color: var(--danger);
  color: #ffffff;
}

.subject-empty-state {
  grid-column: 1 / -1;
  padding: 1.5rem;
  color: var(--text-muted);
  text-align: center;
}

.s-badge-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.s-name {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
}

.s-teacher {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.s-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  font-size: 0.775rem;
}

.s-stats div {
  display: flex;
  flex-direction: column;
}

.s-stats span {
  font-size: 0.675rem;
  color: var(--text-muted);
}

.s-stats strong {
  color: var(--text-main);
  font-size: 0.85rem;
}

/* ==========================================================================
   PANEL 5: SIARAN PENGUMUMAN (BROADCAST)
   ========================================================================== */
.broadcast-cards-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.broadcast-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.border-urgent { border-left: 5px solid var(--danger); }
.border-info { border-left: 5px solid var(--primary); }
.border-success { border-left: 5px solid var(--success); }

.b-badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.b-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.b-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
}

.b-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.b-target {
  font-size: 0.775rem;
  color: var(--text-main);
  background-color: var(--bg-card-subtle);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-top: 0.25rem;
}

/* ==========================================================================
   PANEL 6: KONFIGURASI PENGATURAN (SETTINGS)
   ========================================================================== */
.settings-form-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  max-width: 800px;
}

.form-section-title {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-color);
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--text-main);
}

.form-input,
.form-select,
.form-textarea {
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  background-color: var(--bg-card);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.settings-toggles {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.toggle-row {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  cursor: pointer;
}

.toggle-row input[type="checkbox"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  margin-top: 0.2rem;
  cursor: pointer;
}

.toggle-info strong {
  font-size: 0.85rem;
  color: var(--text-main);
}

.toggle-info p {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.settings-actions {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   PURE CSS MODALS IN ADMIN
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
}

.modal-window {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Modal Open Triggers */
#modal-create-task:checked ~ .modal-task-overlay,
#modal-broadcast:checked ~ .modal-broadcast-overlay {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

#modal-create-task:checked ~ .modal-task-overlay .modal-window,
#modal-broadcast:checked ~ .modal-broadcast-overlay .modal-window {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 1.5rem 1.75rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.modal-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-icon svg {
  width: 22px;
  height: 22px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.modal-sub {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.btn-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-subtle);
  cursor: pointer;
  transition: var(--transition);
}

.btn-close:hover {
  background-color: var(--border-color);
  color: var(--text-main);
}

.btn-close svg {
  width: 18px;
  height: 18px;
}

.modal-form {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.required { color: var(--danger); }

.priority-options {
  display: flex;
  gap: 0.5rem;
}

.priority-radio-label {
  flex: 1;
  cursor: pointer;
}

.priority-radio-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.p-opt-pill {
  display: block;
  text-align: center;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  border: 1.5px solid var(--border-color);
  background-color: var(--bg-card-subtle);
  color: var(--text-muted);
  transition: var(--transition);
}

.priority-radio-label input[type="radio"]:checked + .p-opt-high {
  border-color: var(--danger);
  background-color: var(--danger-light);
  color: var(--danger);
}

.priority-radio-label input[type="radio"]:checked + .p-opt-med {
  border-color: var(--warning);
  background-color: var(--warning-light);
  color: var(--warning);
}

.priority-radio-label input[type="radio"]:checked + .p-opt-low {
  border-color: var(--success);
  background-color: var(--success-light);
  color: var(--success);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   RESPONSIVE DESIGN (Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .analytics-row {
    grid-template-columns: 1fr;
  }

  .classes-grid,
  .subjects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .admin-layout {
    flex-direction: column;
  }

  .admin-sidebar {
    width: 100%;
    height: auto;
    position: static;
  }

  .sidebar-nav {
    flex-direction: row;
    overflow-x: auto;
    padding: 0.75rem 1rem;
  }

  .nav-section-title,
  .sidebar-user-footer {
    display: none;
  }

  .nav-item {
    white-space: nowrap;
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }

  .admin-topbar {
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
  }

  .panel-section {
    padding: 1rem;
  }

  .section-top-bar {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-btn-group {
    width: 100%;
    justify-content: flex-start;
  }

  .subject-form {
    grid-template-columns: 1fr;
  }

  .subject-form-actions {
    flex-wrap: wrap;
  }

  .admin-welcome-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
  }

  .kpi-grid {
    grid-template-columns: 1fr;
  }

  .classes-grid,
  .subjects-grid {
    grid-template-columns: 1fr;
  }

  .form-row,
  .form-grid-2 {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   SUPABASE REAL-TIME STATUS NOTICE BANNER
   ========================================================================== */
.supabase-status-banner {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(14, 165, 233, 0.08) 100%);
  border: 1px dashed var(--primary);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  margin: 1.25rem 2rem 0 2rem;
  font-size: 0.825rem;
  color: var(--text-main);
  animation: fadeIn 0.3s ease;
}

.banner-inner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.banner-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.banner-guide {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.banner-guide code {
  background-color: var(--bg-card-subtle);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-weight: 700;
  color: var(--primary);
}