/* ===================================
   MODERN DESIGN SYSTEM - School Portal
   =================================== */

:root {
  /* Primary Colors */
  --primary-600: #0891b2;
  --primary-500: #06b6d4;
  --primary-400: #22d3ee;
  --primary-300: #67e8f9;

  /* Secondary Colors */
  --secondary-600: #7c3aed;
  --secondary-500: #8b5cf6;
  --secondary-400: #a78bfa;

  /* Accent Colors */
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  --accent-blue: #3b82f6;

  /* Neutral Colors */
  --neutral-50: #f9fafb;
  --neutral-100: #f3f4f6;
  --neutral-200: #e5e7eb;
  --neutral-300: #d1d5db;
  --neutral-400: #9ca3af;
  --neutral-500: #6b7280;
  --neutral-600: #4b5563;
  --neutral-700: #374151;
  --neutral-800: #1f2937;
  --neutral-900: #111827;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
}

/* ===================================
   BASE STYLES
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--neutral-700);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-900);
}

h1 {
  font-size: var(--text-4xl);
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

h5 {
  font-size: var(--text-lg);
}

h6 {
  font-size: var(--text-base);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--neutral-600);
}

/* ===================================
   BUTTONS
   =================================== */

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  min-height: 44px;
  min-width: 44px;

  /* Remove default browser styling */
  -webkit-appearance: none;
  appearance: none;
  font-family: inherit;
}

/* Primary Button */
.btn-primary, button.primary {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover, button.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-600) 100%);
}

.btn-primary:active, button.primary:active {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary, button.secondary {
  background: linear-gradient(135deg, var(--secondary-600) 0%, var(--secondary-500) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover, button.secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border: 2px solid var(--primary-600);
}

.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-700);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--neutral-700);
  border: 1px solid var(--neutral-300);
}

.btn-ghost:hover {
  background: var(--neutral-100);
  border-color: var(--neutral-400);
}

/* Success Button */
.btn-success {
  background: var(--accent-green);
  color: white;
}

.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
}

/* Danger Button */
.btn-danger {
  background: var(--accent-red);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

/* Info Button */
.btn-info {
  background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-info:hover {
  background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-info:active {
  transform: translateY(0);
}

/* ===================================
   CARDS & TILES
   =================================== */

.card, .tile {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card:hover, .tile:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

/* Dashboard Card */
.dashboard-card {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(6, 182, 212, 0.1);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.dashboard-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, transparent 100%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}

.dashboard-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  background: linear-gradient(135deg, #ffffff 0%, #ecf9ff 100%);
}

.dashboard-card .card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--secondary-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dashboard-card .card-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: var(--spacing-sm);
}

.dashboard-card .card-value {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary-600);
  margin-bottom: var(--spacing-md);
}

.dashboard-card .card-description {
  font-size: var(--text-sm);
  color: var(--neutral-500);
}

/* Stat Card */
.stat-card {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--primary-600);
}

.stat-card.green {
  border-left-color: var(--accent-green);
}

.stat-card.red {
  border-left-color: var(--accent-red);
}

.stat-card.yellow {
  border-left-color: var(--accent-yellow);
}

.stat-card.blue {
  border-left-color: var(--accent-blue);
}

.stat-card-label {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  font-weight: 500;
}

.stat-card-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--neutral-900);
  margin-top: var(--spacing-sm);
}

/* ===================================
   INPUTS & FORMS
   =================================== */

input, textarea, select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--text-base);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  font-family: inherit;
  transition: all var(--transition-base);
  background: white;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

input:disabled, textarea:disabled, select:disabled {
  background: var(--neutral-50);
  color: var(--neutral-400);
  cursor: not-allowed;
}

/* Enhanced form controls with modern styling */
.form-select,
.form-input,
.form-textarea {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: inherit;
  background-color: white;
  color: var(--neutral-900);
  transition: all var(--transition-base);
}

.form-select:hover,
.form-input:hover,
.form-textarea:hover {
  border-color: var(--neutral-300);
  background-color: var(--neutral-50);
}

.form-select:focus,
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
  background-color: white;
}

/* Dropdown arrow styling for select elements */
select.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 12px;
  padding-right: 36px;
}

label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--spacing-sm);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

/* ===================================
   TABLES
   =================================== */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

thead {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
}

th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  font-size: var(--text-sm);
}

td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--neutral-200);
}

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

tbody tr:hover {
  background-color: var(--neutral-50);
}

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

/* ===================================
   NAVIGATION & HEADERS
   =================================== */

.navbar {
  background: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--text-lg);
  font-weight: 700;
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.navbar-menu a {
  color: white;
  text-decoration: none;
  transition: color var(--transition-base);
  font-weight: 500;
}

.navbar-menu a:hover {
  color: var(--primary-300);
}

/* ===================================
   GRID LAYOUTS
   =================================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

/* ===================================
   CONTAINERS & SECTIONS
   =================================== */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.section {
  margin-bottom: var(--spacing-2xl);
}

.section-header {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--primary-200);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  color: var(--neutral-500);
}

/* ===================================
   MODALS & DIALOGS
   =================================== */

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s var(--transition-base);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: white;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  max-width: 500px;
  width: 90%;
  animation: slideUp 0.3s var(--transition-base);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.modal-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--neutral-900);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--neutral-400);
}

.modal-close:hover {
  color: var(--neutral-700);
}

.modal-body {
  margin-bottom: var(--spacing-lg);
}

.modal-body form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-xl);
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  font-weight: 600;
  margin: 20px 0 15px 0;
  padding-bottom: 10px;
  border-bottom: 2px solid #e5e7eb;
  width: 100%;
}

/* ===================================
   BADGES & TAGS
   =================================== */

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: rgba(6, 182, 212, 0.1);
  color: var(--primary-600);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-yellow);
}

/* ===================================
   ALERTS
   =================================== */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-blue);
  border-left: 4px solid var(--accent-blue);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
  border-left: 4px solid var(--accent-green);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-yellow);
  border-left: 4px solid var(--accent-yellow);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  border-left: 4px solid var(--accent-red);
}

/* ===================================
   UTILITIES
   =================================== */

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--neutral-500);
}

.text-primary {
  color: var(--primary-600);
}

.text-success {
  color: var(--accent-green);
}

.text-danger {
  color: var(--accent-red);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }

/* ===================================
   MODERN NOTIFICATIONS
   =================================== */

.modern-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  min-width: 350px;
  max-width: 500px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--neutral-200);
  z-index: 10000;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s ease;
  overflow: hidden;
}

.modern-notification.show {
  transform: translateX(0);
  opacity: 1;
}

.modern-notification-info {
  border-left: 4px solid var(--primary-500);
}

.modern-notification-success {
  border-left: 4px solid var(--accent-green);
}

.modern-notification-error {
  border-left: 4px solid var(--accent-red);
}

.modern-notification-warning {
  border-left: 4px solid var(--accent-yellow);
}

.notification-content {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  gap: var(--spacing-sm);
}

.notification-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.notification-message {
  flex: 1;
  font-size: 0.95rem;
  line-height: 1.4;
  color: var(--neutral-800);
}

.notification-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--neutral-400);
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.notification-close:hover {
  background: var(--neutral-100);
  color: var(--neutral-600);
}

.notification-progress {
  height: 3px;
  background: var(--neutral-200);
  position: relative;
}

.notification-progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: currentColor;
  animation: progress 5s linear forwards;
}

.modern-notification-info .notification-progress::after {
  background: var(--primary-500);
}

.modern-notification-success .notification-progress::after {
  background: var(--accent-green);
}

.modern-notification-error .notification-progress::after {
  background: var(--accent-red);
}

.modern-notification-warning .notification-progress::after {
  background: var(--accent-yellow);
}

@keyframes progress {
  from { width: 100%; }
  to { width: 0%; }
}

/* ===================================
   LOADING SPINNER & CHECKMARK
   =================================== */

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
  margin-right: 8px;
}

.checkmark {
  display: inline-block;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  margin-right: 8px;
  color: #28a745;
  font-weight: bold;
  text-align: center;
  line-height: 14px;
  font-size: 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===================================
   BUTTON STATES
   =================================== */

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary.loading {
  position: relative;
  color: transparent;
}

.btn-primary.loading::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(-20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }

  h1 {
    font-size: var(--text-3xl);
  }

  h2 {
    font-size: var(--text-2xl);
  }

  .navbar {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .navbar-menu {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .modal-content {
    width: 95%;
    padding: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
  }

  body {
    font-size: var(--text-sm);
  }

  h1 {
    font-size: var(--text-2xl);
  }

  .card, .tile {
    padding: var(--spacing-md);
  }

  button, .btn {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Modern UI Alerts, Toasts, Loading */

#uiContainer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  pointer-events: none;
  z-index: 9999;
}

.ui-alert, .ui-toast {
  margin: 1rem auto;
  padding: 0.85rem 1.5rem;
  max-width: 400px;
  border-radius: var(--radius-lg);
  color: white;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 1;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.ui-alert-info { background: var(--primary-600); }
.ui-alert-success { background: var(--accent-green); }
.ui-alert-warning { background: var(--accent-yellow); color: #333; }
.ui-alert-error { background: var(--accent-red); }

.ui-toast-info { background: rgba(0,0,0,0.7); }
.ui-toast-success { background: rgba(16,185,129,0.9); }
.ui-toast-warning { background: rgba(245,158,11,0.9); }
.ui-toast-error { background: rgba(220,38,38,0.9); }

.ui-alert.hide, .ui-toast.hide { opacity: 0; transform: translateY(-20px); }

#uiLoadingOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  flex-direction: column;
  color: white;
  font-size: var(--text-lg);
  animation: fadeInOverlay 0.3s ease-in;
}

#uiLoadingOverlay.fade-out {
  animation: fadeOutOverlay 0.3s ease-out;
}

.modern-loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: rgba(255, 255, 255, 0.95);
  padding: 3rem 2.5rem;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  min-width: 280px;
  text-align: center;
}

.modern-spinner {
  width: 48px;
  height: 48px;
  position: relative;
}

/* Modern animated circle spinner */
.modern-spinner::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border: 3px solid rgba(8, 145, 178, 0.15);
  border-radius: 50%;
  border-top-color: var(--primary-600);
  border-right-color: var(--primary-500);
  animation: spinnerRotate 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
  box-shadow: 0 0 0 0 rgba(8, 145, 178, 0);
}

.modern-spinner::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border: 3px solid rgba(8, 145, 178, 0.1);
  border-radius: 50%;
  animation: spinnerRotate 1.2s linear infinite;
  opacity: 0.7;
}

@keyframes spinnerRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Button Loading States */
.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-loading .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid #ffffff;
  border-radius: 50%;
  animation: spinnerRotate 1s linear infinite;
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary:disabled:hover {
  transform: none !important;
  box-shadow: 0 4px 12px rgba(0, 116, 217, 0.15);
}

/* Attendance Actions */
.attendance-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-top: 20px;
  padding: 16px;
  background: #f8fafc;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.attendance-actions button {
  cursor: pointer !important;
  pointer-events: auto !important;
}

.attendance-actions .btn-primary {
  min-width: 160px;
  position: relative;
}

@keyframes fadeInOverlay {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeOutOverlay {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.loading-text {
  color: var(--neutral-700);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* Legacy loader styles (for backward compatibility) */
.loader {
  border: 6px solid #f3f3f3;
  border-top: 6px solid var(--primary-300);
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===================================
   TEACHER DASHBOARD STYLES
   =================================== */

/* Header */
.modern-header {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.school-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.school-logo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid white;
}

.school-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: 0;
}

.school-motto {
  font-size: var(--text-sm);
  opacity: 0.9;
  margin: 0;
}

.header-actions {
  display: flex;
  gap: var(--spacing-md);
}

/* Dashboard Wrapper */
.dashboard-wrapper {
  display: flex;
  min-height: calc(100vh - 120px);
  max-width: 1440px;
  margin: 0 auto;
  background: white;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

/* Tab Navigation */
.teacher-tabs {
  width: 280px;
  background: linear-gradient(180deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
  border-right: 1px solid var(--neutral-200);
  padding: var(--spacing-lg) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.teacher-tab-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: none;
  text-align: left;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--neutral-600);
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin-right: var(--spacing-sm);
  position: relative;
}

.teacher-tab-btn:hover {
  background: var(--neutral-200);
  color: var(--neutral-900);
}

.teacher-tab-btn.active {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.teacher-tab-btn.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: white;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: var(--spacing-xl);
  overflow-y: auto;
}

/* Tab Panes */
.tab-pane {
  display: none;
  animation: fadeIn var(--transition-base);
}

.tab-pane.active {
  display: block;
}

/* Dashboard Overview */
.dashboard-header {
  margin-bottom: var(--spacing-xl);
}

.welcome-message {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: var(--spacing-sm);
}

.teacher-roles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.role-badge {
  background: linear-gradient(135deg, var(--secondary-500) 0%, var(--secondary-600) 100%);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: 500;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.metric-card {
  background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(6, 182, 212, 0.1);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  transition: all var(--transition-base);
}

.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.metric-icon {
  font-size: 3rem;
  opacity: 0.8;
}

.metric-content h3 {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary-600);
  margin: 0 0 var(--spacing-xs) 0;
}

.metric-content p {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  margin: 0;
}

/* Quick Actions */
.quick-actions {
  background: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--neutral-200);
}

.quick-actions h3 {
  margin-bottom: var(--spacing-lg);
  color: var(--neutral-900);
}

.action-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.action-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--neutral-700);
  font-weight: 500;
  transition: all var(--transition-base);
}

.action-btn:hover {
  background: var(--primary-50);
  border-color: var(--primary-300);
  color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.action-icon {
  font-size: var(--text-xl);
}

/* Tab Headers */
.tab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--neutral-200);
}

.tab-header h2 {
  margin: 0;
  color: var(--neutral-900);
}

/* Tab Content */
.tab-content {
  background: var(--neutral-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  min-height: 400px;
}

/* Data Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--neutral-200);
}

.data-table th {
  background: var(--neutral-100);
  font-weight: 600;
  color: var(--neutral-700);
}

.data-table tbody tr:hover {
  background: var(--neutral-50);
}

.data-table .no-data {
  text-align: center;
  color: var(--neutral-500);
  font-style: italic;
  padding: var(--spacing-xl);
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--neutral-700);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* Loading Spinner */
.loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  color: var(--neutral-500);
}

.loading-spinner::before {
  content: '';
  width: 24px;
  height: 24px;
  border: 3px solid var(--neutral-300);
  border-top: 3px solid var(--primary-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: var(--spacing-md);
}

/* Calendar Styles */
.calendar-container {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--neutral-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.calendar-day {
  background: white;
  padding: var(--spacing-md);
  min-height: 80px;
  cursor: pointer;
  transition: all var(--transition-base);
}

.calendar-day:hover {
  background: var(--primary-50);
}

.calendar-day.today {
  background: var(--primary-100);
  font-weight: 600;
}

.calendar-day.has-events {
  position: relative;
}

.calendar-day.has-events::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--primary-600);
  border-radius: 50%;
}

/* Messages Styles */
.messages-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-lg);
  height: 600px;
}

.messages-list {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.messages-list-container {
  max-height: 500px;
  overflow-y: auto;
}

.message-item {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--neutral-200);
  cursor: pointer;
  transition: all var(--transition-base);
}

.message-item:hover {
  background: var(--neutral-50);
}

.message-item.unread {
  background: var(--primary-50);
  border-left: 4px solid var(--primary-600);
}

.message-content {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  height: 100%;
  overflow-y: auto;
}

/* Modal Overlays */
.modal-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  z-index: 1000;
  animation: fadeIn var(--transition-base);
}

.modal-overlay.hidden {
  display: none !important;
}

.modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.large-modal .modal-content {
  width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--neutral-200);
}

.modal-header h3 {
  margin: 0;
  color: var(--neutral-900);
}

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  color: var(--neutral-500);
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.modal-close:hover {
  background: var(--neutral-100);
  color: var(--neutral-700);
}

.modal-body {
  padding: var(--spacing-xl);
}

/* Responsive Design for Dashboard */
@media (max-width: 1024px) {
  .dashboard-wrapper {
    flex-direction: column;
  }

  .teacher-tabs {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--neutral-200);
    padding: var(--spacing-md);
  }

  .teacher-tab-btn {
    flex-shrink: 0;
    width: auto;
    min-width: 120px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    margin-right: 0;
    margin-bottom: var(--spacing-sm);
  }

  .messages-container {
    grid-template-columns: 1fr;
    height: auto;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }

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

  .action-buttons {
    grid-template-columns: 1fr;
  }

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

  .tab-header {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: stretch;
  }

  .calendar-grid {
    grid-template-columns: repeat(7, 1fr);
    font-size: var(--text-sm);
  }

  .calendar-day {
    padding: var(--spacing-sm);
    min-height: 60px;
  }
}

/* ===================================
   PROFILE STYLES
   =================================== */

.profile-container {
  max-width: 1200px;
  margin: 0 auto;
}

.profile-card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.profile-header {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
  padding: var(--spacing-2xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.profile-info h3 {
  margin: 0 0 var(--spacing-sm) 0;
  font-size: var(--text-2xl);
  font-weight: 700;
}

.profile-info p {
  margin: var(--spacing-xs) 0;
  opacity: 0.9;
  font-size: var(--text-base);
}

.profile-form {
  padding: var(--spacing-2xl);
}

.form-section {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--neutral-200);
}

.form-section:last-child {
  border-bottom: none;
  margin-bottom: var(--spacing-xl);
}

.form-section h4 {
  color: var(--primary-600);
  margin-bottom: var(--spacing-lg);
  font-size: var(--text-lg);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--spacing-sm);
  font-size: var(--text-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1.5px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: inherit;
  transition: all var(--transition-base);
  background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
  border-color: var(--neutral-300);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--neutral-200);
  margin-top: var(--spacing-xl);
}

/* Profile Section Styles */
.profile-container {
  max-width: 100%;
}

.profile-card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.profile-header {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: white;
  padding: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  border: 3px solid rgba(255, 255, 255, 0.3);
}

.avatar-icon {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.profile-info h3 {
  margin: 0 0 var(--spacing-xs) 0;
  font-size: var(--text-xl);
  font-weight: 700;
}

.profile-info p {
  margin: var(--spacing-xs) 0;
  opacity: 0.9;
  font-size: var(--text-sm);
}

.profile-form {
  padding: var(--spacing-xl);
}

.form-section {
  margin-bottom: var(--spacing-xl);
}

.form-section h4 {
  color: var(--neutral-800);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-100);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

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

.form-group label {
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--spacing-xs);
  font-size: var(--text-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-md);
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: all var(--transition-base);
  background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-600);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
  border-color: var(--neutral-300);
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--neutral-200);
  margin-top: var(--spacing-xl);
}

@media (max-width: 768px) {
  .profile-header {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-lg);
  }

  .profile-avatar {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }

  .profile-form {
    padding: var(--spacing-lg);
  }

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

  .form-actions {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }
}

/* Classes Grid and Cards */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.class-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--neutral-200);
}

.class-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-300);
}

.class-card-name {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--primary-600);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.class-card-info {
  margin-bottom: var(--spacing-lg);
}

.class-card-info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--neutral-100);
}

.class-card-info-item:last-child {
  border-bottom: none;
}

.class-card-info-label {
  font-weight: 500;
  color: var(--neutral-600);
}

.class-card-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.class-card-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.class-card-btn-primary {
  background: var(--primary-600);
  color: white;
}

.class-card-btn-primary:hover {
  background: var(--primary-700);
  transform: translateY(-1px);
}

.class-card-btn-secondary {
  background: var(--neutral-100);
  color: var(--neutral-700);
  border: 1px solid var(--neutral-300);
}

.class-card-btn-secondary:hover {
  background: var(--neutral-200);
  border-color: var(--neutral-400);
}

/* Responsive adjustments for class cards */
@media (max-width: 768px) {
  .classes-grid {
    grid-template-columns: 1fr;
  }

  .class-card-actions {
    flex-direction: column;
  }

  .class-card-btn {
    width: 100%;
  }
}

/* ===================================
   QUIZ SYSTEM STYLES
   =================================== */

.questions-preview {
  margin-top: 20px;
  padding: 20px;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid #e9ecef;
}

.questions-preview h4 {
  margin: 0 0 15px 0;
  color: #495057;
  font-size: 1.1rem;
}

.questions-list {
  max-height: 400px;
  overflow-y: auto;
}

.question-item {
  background: white;
  padding: 15px;
  margin-bottom: 10px;
  border-radius: 6px;
  border: 1px solid #dee2e6;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.question-item h5 {
  margin: 0 0 10px 0;
  color: #007bff;
  font-size: 1rem;
}

.question-item p {
  margin: 0 0 10px 0;
  font-weight: 500;
  color: #495057;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.option {
  padding: 8px 12px;
  background: #f8f9fa;
  border-radius: 4px;
  font-size: 0.9rem;
  border-left: 3px solid #6c757d;
}

.option.correct {
  border-left-color: #28a745;
  background: #d4edda;
  font-weight: 500;
}

.quiz-generator-bar {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.quiz-generator-bar .form-group {
  flex: 1;
  min-width: 200px;
}

.large-modal .modal-content {
  max-width: 800px;
  width: 95%;
}

.quiz-table-container {
  overflow-x: auto;
}

.quiz-table-container table {
  min-width: 800px;
}

/* AI Status Indicator */
.ai-status {
  margin-top: 8px;
  text-align: center;
}

.ai-status small {
  color: var(--neutral-500);
  font-size: 0.8rem;
  background: var(--neutral-100);
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-block;
}

.ai-status small.active {
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
}

.ai-status small.error {
  color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
}

/* ==================== PROFILE EDIT MODAL STYLES ==================== */

.form-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--neutral-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--neutral-200);
}

.form-section h4 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--neutral-800);
  font-size: 1.1rem;
  font-weight: 600;
  border-bottom: 2px solid var(--primary-500);
  padding-bottom: var(--spacing-xs);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group label {
  font-weight: 500;
  color: var(--neutral-700);
  font-size: 0.9rem;
}

.form-input,
.form-select,
.form-textarea {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.readonly-field {
  background: var(--neutral-100) !important;
  color: var(--neutral-600) !important;
  cursor: not-allowed !important;
  opacity: 0.7;
}

.field-note {
  font-size: 0.8rem;
  color: var(--neutral-500);
  font-style: italic;
  margin-top: var(--spacing-xs);
}

.password-info {
  position: relative;
}

.password-info input {
  padding-right: 40px;
}

.large-modal .modal-content {
  max-width: 800px;
  width: 90vw;
}

/* ==================== END PROFILE EDIT MODAL STYLES ==================== */

/* Student dashboard specific cards */
.assignments-grid,
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.assignment-card,
.quiz-card {
  background: white;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.assignment-header,
.quiz-header {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-sm);
  align-items: flex-start;
}

.assignment-status {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.assignment-status.pending {
  background: rgba(243, 182, 23, 0.15);
  color: #d97706;
}
.assignment-status.submitted {
  background: rgba(16, 185, 129, 0.15);
  color: #16a34a;
}
.assignment-status.overdue {
  background: rgba(239, 68, 68, 0.15);
  color: #b91c1c;
}

.assignment-actions,
.quiz-actions {
  margin-top: auto;
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  align-items: center;
}

.quiz-meta {
  color: var(--neutral-500);
  font-size: 0.9rem;
}

.quiz-card.done {
  border-color: rgba(16, 185, 129, 0.5);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  background: rgba(59, 130, 246, 0.15);
  color: #1d4ed8;
  font-weight: 600;
}

.quiz-attempt-table {
  margin-top: 14px;
}

.quiz-attempt-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.quiz-attempt-table th,
.quiz-attempt-table td {
  padding: 8px 10px;
  border: 1px solid var(--neutral-200);
  text-align: left;
}

.quiz-attempt-table th {
  background: var(--neutral-100);
  font-weight: 700;
}

/* ==================== QUIZ QUESTION STYLES ==================== */

.quiz-question-header {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.quiz-question-progress {
  font-size: 0.9rem;
  color: var(--neutral-600);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.quiz-question-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--neutral-800);
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--neutral-50);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-500);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.quiz-option-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border: 2px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  background: white;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1rem;
  text-align: left;
  min-height: 60px;
  width: 100%;
  box-sizing: border-box;
}

.quiz-option-btn:hover {
  border-color: var(--primary-400);
  background: var(--primary-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quiz-option-btn.selected {
  border-color: var(--primary-500);
  background: var(--primary-100);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.quiz-option-btn.correct {
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-green);
  font-weight: 600;
}

.quiz-option-btn.incorrect {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
}

.quiz-option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.quiz-option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--neutral-200);
  color: var(--neutral-700);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.quiz-option-btn.selected .quiz-option-letter {
  background: var(--primary-500);
  color: white;
}

.quiz-option-btn.correct .quiz-option-letter {
  background: var(--accent-green);
  color: white;
}

.quiz-option-btn.incorrect .quiz-option-letter {
  background: var(--accent-red);
  color: white;
}

.quiz-option-text {
  flex: 1;
  line-height: 1.4;
}

.quiz-navigation {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.quiz-navigation .btn {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  min-width: 120px;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .quiz-question-text {
    font-size: 1.1rem;
    padding: var(--spacing-sm);
  }

  .quiz-option-btn {
    padding: var(--spacing-md);
    min-height: 50px;
    font-size: 0.95rem;
  }

  .quiz-option-letter {
    width: 35px;
    height: 35px;
    font-size: 1rem;
  }

  .quiz-navigation .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9rem;
    min-width: 100px;
  }
}

@media (max-width: 480px) {
  .quiz-question-text {
    font-size: 1rem;
    padding: var(--spacing-xs);
  }

  .quiz-option-btn {
    padding: var(--spacing-sm);
    min-height: 45px;
    gap: var(--spacing-sm);
  }

  .quiz-option-letter {
    width: 30px;
    height: 30px;
    font-size: 0.9rem;
  }

  .quiz-option-text {
    font-size: 0.9rem;
  }

  .quiz-navigation {
    flex-direction: column;
    align-items: center;
  }

  .quiz-navigation .btn {
    width: 100%;
    max-width: 200px;
  }
}