/* ==========================================================================
   SIKKHALAY SUPER ADMIN — ENTERPRISE DESIGN SYSTEM & CSS TOKENS
   Modern Dark/Light Theme, Glassmorphism, Micro-Interactions, DataTables & UI
   ========================================================================== */

:root {
  /* Light Theme Palette */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-elevated: #ffffff;
  --bg-sidebar: #0a0f1d;
  --border-color: #e2e8f0;
  --border-subtle: #f1f5f9;
  --border-hover: #cbd5e1;

  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --text-inverse: #f8fafc;

  /* Brand Colors */
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-light: #eff6ff;
  --brand-soft: rgba(37, 99, 235, 0.08);

  /* Portal Accent Role Tokens */
  --role-student: #059669;
  --role-teacher: #4f46e5;
  --role-parent: #0284c7;
  --role-institute: #d97706;
  --role-coaching: #e11d48;
  --role-ai: #8b5cf6;

  /* Status Colors */
  --status-success: #10b981;
  --status-success-bg: #ecfdf5;
  --status-warning: #f59e0b;
  --status-warning-bg: #fffbeb;
  --status-danger: #ef4444;
  --status-danger-bg: #fef2f2;
  --status-info: #3b82f6;
  --status-info-bg: #eff6ff;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 4px 6px -1px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
  --shadow-pulse: 0 0 15px rgba(16, 185, 129, 0.4);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --font-mono: 'JetBrains Mono', Consolas, monospace;
}

[data-theme="dark"] {
  --bg-page: #060913;
  --bg-surface: #0f172a;
  --bg-elevated: #1e293b;
  --bg-sidebar: #04060d;
  --border-color: #1e293b;
  --border-subtle: #111827;
  --border-hover: #334155;

  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --text-subtle: #475569;

  --brand-primary: #3b82f6;
  --brand-primary-hover: #60a5fa;
  --brand-light: rgba(59, 130, 246, 0.15);
  --brand-soft: rgba(59, 130, 246, 0.12);

  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-warning-bg: rgba(245, 158, 11, 0.15);
  --status-danger-bg: rgba(239, 68, 68, 0.15);
  --status-info-bg: rgba(59, 130, 246, 0.15);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.6);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', 'Hind Siliguri', -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-page);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; border: none; background: none; outline: none; }
button { cursor: pointer; }
img, svg { display: block; max-width: 100%; }

/* --- APP LAYOUT --- */
.app-container {
  display: flex;
  flex: 1;
  height: calc(100vh - 64px);
  overflow: hidden;
}

/* --- HEADER --- */
header.global-header {
  height: 64px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-normal);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.super-badge {
  background: var(--brand-light);
  color: var(--brand-primary);
  font-size: 0.65rem;
  font-weight: 800;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(37, 99, 235, 0.2);
}

/* Search bar */
.header-search {
  width: 380px;
  background-color: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header-search:hover {
  border-color: var(--brand-primary);
  background-color: var(--bg-surface);
}

.kbd-shortcut {
  margin-left: auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  box-shadow: var(--shadow-xs);
}

/* Platform Pulse */
.pulse-card {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--status-success-bg);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--status-success);
}

.pulse-dot {
  width: 9px;
  height: 9px;
  background-color: var(--status-success);
  border-radius: 50%;
  box-shadow: var(--shadow-pulse);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
}

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

.badge-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background-color: var(--status-danger);
  color: white;
  font-size: 0.65rem;
  font-weight: 800;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  cursor: pointer;
}

.user-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: white;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

.user-info-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.user-name { font-size: 0.78rem; font-weight: 700; color: var(--text-main); line-height: 1.1; }
.user-role-label { font-size: 0.65rem; color: var(--text-muted); }

/* --- SIDEBAR --- */
aside.sidebar {
  width: 250px;
  background-color: var(--bg-sidebar);
  color: var(--text-inverse);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal);
  z-index: 90;
  overflow-y: auto;
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-section-title {
  padding: 1.1rem 1.25rem 0.35rem;
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.55rem 1.25rem;
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.nav-item:hover {
  color: #f8fafc;
  background-color: rgba(255, 255, 255, 0.04);
}

.nav-item.active {
  color: #ffffff;
  background-color: rgba(37, 99, 235, 0.18);
  border-left-color: var(--brand-primary);
  font-weight: 700;
}

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

.nav-item .nav-badge {
  margin-left: auto;
  font-size: 0.68rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  background: rgba(255, 255, 255, 0.1);
}

/* --- MAIN WORKSPACE --- */
main.main-workspace {
  flex: 1;
  overflow-y: auto;
  padding: 1.75rem;
  background-color: var(--bg-page);
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.view-title-group h1 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
}

.view-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.view-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* --- KPI GRID --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.kpi-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

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

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.kpi-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.kpi-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kpi-value {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.kpi-footer {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* --- CARDS & CONTAINERS --- */
.card-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.card-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.card-box-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- DATA TABLES --- */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
}

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

table.data-table th {
  padding: 0.75rem 1rem;
  background-color: var(--bg-page);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-color);
}

table.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: middle;
}

table.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-success { background-color: var(--status-success-bg); color: var(--status-success); }
.badge-warning { background-color: var(--status-warning-bg); color: var(--status-warning); }
.badge-danger { background-color: var(--status-danger-bg); color: var(--status-danger); }
.badge-info { background-color: var(--status-info-bg); color: var(--status-info); }
.badge-portal { background-color: var(--brand-light); color: var(--brand-primary); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary { background-color: var(--brand-primary); color: #ffffff; }
.btn-primary:hover { background-color: var(--brand-primary-hover); transform: translateY(-1px); }

.btn-secondary {
  background-color: var(--bg-surface);
  border-color: var(--border-color);
  color: var(--text-main);
}
.btn-secondary:hover {
  background-color: var(--bg-page);
  border-color: var(--border-hover);
}

.btn-success { background-color: var(--status-success); color: #ffffff; }
.btn-danger { background-color: var(--status-danger); color: #ffffff; }
.btn-warning { background-color: var(--status-warning); color: #ffffff; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.75rem; border-radius: var(--radius-sm); }

/* Inputs & Form Controls */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-page);
  color: var(--text-main);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--brand-primary);
  background-color: var(--bg-surface);
}

/* Filter bar */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  background-color: var(--bg-surface);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.filter-search {
  flex: 1;
  min-width: 220px;
  position: relative;
}

.filter-search input {
  width: 100%;
  padding: 0.45rem 0.85rem 0.45rem 2.2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-page);
  font-size: 0.85rem;
}

.filter-search svg {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px;
  height: 16px;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--bg-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: 1.15rem; font-weight: 800; color: var(--text-main); }
.modal-body { padding: 1.5rem; }
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  background-color: var(--bg-page);
}

/* Command Palette */
.command-palette-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.command-palette-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.command-palette-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.command-search-input {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  border-bottom: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-main);
}

.command-results-list {
  max-height: 360px;
  overflow-y: auto;
  padding: 0.5rem;
}

.command-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.command-item:hover, .command-item.selected {
  background-color: var(--brand-light);
  color: var(--brand-primary);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  animation: toast-in 0.3s ease;
}

.toast-success { border-left: 4px solid var(--status-success); }
.toast-danger { border-left: 4px solid var(--status-danger); }
.toast-info { border-left: 4px solid var(--status-info); }

@keyframes toast-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 900px) {
  aside.sidebar {
    position: fixed;
    top: 64px;
    bottom: 0;
    left: -260px;
    z-index: 150;
    transition: left var(--transition-normal);
  }
  aside.sidebar.mobile-open {
    left: 0;
  }
  .header-search { display: none; }
}