/* ============================================
   Student Management System — Design Tokens
   ============================================ */

:root {
  /* Brand — deep emerald (trust/growth), warm gold (money/attention) */
  --brand-800: #094A3A;
  --brand-700: #0B6B53;
  --brand-600: #0E8267;
  --brand-500: #14A183;
  --brand-100: #E1F3ED;
  --brand-50:  #F1FAF6;

  --gold-700: #8A6413;
  --gold-600: #A6791E;
  --gold-500: #C0942D;
  --gold-100: #FBF1DC;

  --brick-700: #8F332C;
  --brick-600: #B23C33;
  --brick-100: #FBE7E5;

  --slate-700: #2E4C68;
  --slate-600: #3B6FA0;
  --slate-100: #E8F0F7;

  /* Semantic aliases (keep existing class names working) */
  --primary: var(--brand-600);
  --primary-dark: var(--brand-700);
  --primary-light: var(--brand-500);
  --primary-bg: var(--brand-100);

  --secondary: var(--slate-600);
  --secondary-dark: var(--slate-700);

  --success: var(--brand-600);
  --success-light: var(--brand-100);
  --success-dark: var(--brand-800);

  --warning: var(--gold-600);
  --warning-light: var(--gold-100);
  --warning-dark: var(--gold-700);

  --danger: var(--brick-600);
  --danger-light: var(--brick-100);
  --danger-dark: var(--brick-700);

  --info: var(--slate-600);
  --info-light: var(--slate-100);

  /* Neutrals — cool, quiet gray scale (deliberately not warm cream) */
  --gray-50:  #F7F8FA;
  --gray-100: #EEF0F3;
  --gray-200: #E3E6EA;
  --gray-300: #CDD2D9;
  --gray-400: #9AA3AF;
  --gray-500: #6B7382;
  --gray-600: #4A5568;
  --gray-700: #333B47;
  --gray-800: #202631;
  --gray-900: #12161D;

  /* Surfaces */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F7F8FA;
  --bg-sidebar: #12161D;

  /* Text */
  --text-primary: #151A21;
  --text-secondary: #5B6472;
  --text-light: #8A94A6;
  --text-white: #FFFFFF;

  /* Border / radius */
  --border-color: #E3E6EA;
  --border-radius: 6px;
  --border-radius-lg: 10px;

  /* Shadow — restrained, not glowy */
  --shadow-sm: 0 1px 2px 0 rgba(18, 22, 29, 0.05);
  --shadow:    0 1px 3px 0 rgba(18, 22, 29, 0.08), 0 1px 2px -1px rgba(18, 22, 29, 0.06);
  --shadow-md: 0 4px 10px -2px rgba(18, 22, 29, 0.10), 0 2px 4px -2px rgba(18, 22, 29, 0.06);
  --shadow-lg: 0 12px 24px -6px rgba(18, 22, 29, 0.16), 0 4px 8px -4px rgba(18, 22, 29, 0.08);

  /* Layout */
  --sidebar-width: 256px;
  --header-height: 64px;

  /* Type */
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --transition: all 0.15s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --brand-600: #1CB894;
  --brand-500: #2DD4A8;
  --primary: var(--brand-600);
  --primary-dark: #17A184;
  --primary-light: var(--brand-500);
  --primary-bg: #0F2B24;

  --gold-600: #D2A23C;
  --warning: var(--gold-600);
  --warning-light: #332209;
  --warning-dark: #E8B94E;

  --danger: #D9635A;
  --danger-light: #331211;
  --danger-dark: #EF8880;

  --info: #6FA3D6;
  --info-light: #10222F;

  --bg-primary: #171C24;
  --bg-secondary: #0D1117;
  --bg-sidebar: #0B0E13;

  --text-primary: #F1F3F5;
  --text-secondary: #ABB3BF;
  --text-light: #6E7684;

  --border-color: #262D38;

  --gray-50: #1B212B;
  --gray-100: #232A35;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 10px -2px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 24px -6px rgba(0, 0, 0, 0.55);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

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

ul {
  list-style: none;
}

svg {
  display: block;
}

/* Focus visibility (accessibility floor) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-white);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(155deg, var(--brand-500), var(--brand-700));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo-mark svg {
  width: 18px;
  height: 18px;
  stroke: #fff;
}

.sidebar-header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.01em;
}

.sidebar-header p {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 1px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.sidebar-nav ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav ul li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--border-radius);
  color: rgba(255, 255, 255, 0.62);
  transition: var(--transition);
  font-size: 0.9rem;
  font-weight: 500;
}

.sidebar-nav ul li a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-white);
}

.sidebar-nav ul li a.active {
  background: var(--brand-700);
  color: var(--text-white);
}

.sidebar-nav ul li a .nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-nav ul li a .nav-icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.sidebar-footer {
  padding: 16px 20px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-info {
  display: flex;
  align-items: center;
  margin-bottom: 14px;
}

.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--brand-500), var(--brand-700));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  flex-shrink: 0;
}

.user-details h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-white);
}

.user-details p {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.45);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

/* Header */
.header {
  background: var(--bg-primary);
  height: var(--header-height);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 18px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 6px;
  border-radius: var(--border-radius);
}

.menu-toggle svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.page-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle,
.notification-btn {
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--border-radius);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.theme-toggle svg,
.notification-btn svg {
  width: 19px;
  height: 19px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.theme-toggle:hover,
.notification-btn:hover {
  background: var(--gray-100);
  border-color: var(--border-color);
  color: var(--text-primary);
}

/* Content Area */
.content {
  padding: 28px;
}

/* Cards */
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

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

.card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  background: var(--gray-50);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  position: relative;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: var(--transition);
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--stat-accent, var(--brand-600));
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid currentColor;
  background: transparent;
}

.stat-icon svg {
  width: 19px;
  height: 19px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.stat-icon.primary { color: var(--brand-600); }
.stat-icon.success { color: var(--brand-600); }
.stat-icon.warning { color: var(--gold-600); }
.stat-icon.danger  { color: var(--brick-600); }
.stat-icon.info    { color: var(--slate-600); }

.stat-info h4 {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.stat-info p {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

.stat-info small {
  display: inline-block;
  margin-top: 5px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* Tables */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

table thead th {
  background: var(--gray-50);
  padding: 11px 15px;
  text-align: left;
  font-weight: 600;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

table tbody td {
  padding: 13px 15px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

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

table tbody tr:hover {
  background: var(--gray-50);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--border-radius);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  font-family: var(--font-body);
}

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

.btn-primary {
  background: var(--brand-600);
  color: var(--text-white);
}

.btn-primary:hover:not(:disabled) {
  background: var(--brand-700);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-success {
  background: var(--brand-600);
  color: var(--text-white);
}

.btn-success:hover:not(:disabled) {
  background: var(--brand-700);
}

.btn-danger {
  background: var(--brick-600);
  color: var(--text-white);
}

.btn-danger:hover:not(:disabled) {
  background: var(--brick-700);
}

.btn-warning {
  background: var(--gold-600);
  color: var(--text-white);
}

.btn-warning:hover:not(:disabled) {
  background: var(--gold-700);
}

.btn-sm {
  padding: 6px 13px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 12px 26px;
  font-size: 0.98rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.btn-icon:hover {
  background: var(--gray-100);
  color: var(--text-primary);
}

/* Forms */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 7px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  font-family: var(--font-body);
  transition: var(--transition);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form-control:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px var(--brand-100);
}

.form-control:disabled {
  background: var(--gray-100);
  cursor: not-allowed;
}

select.form-control {
  cursor: pointer;
}

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

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  border-radius: 20px;
  font-size: 0.74rem;
  font-weight: 600;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.badge-success {
  background: var(--success-light);
  color: var(--success-dark);
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
}

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

.badge-info {
  background: var(--info-light);
  color: var(--info);
}

.badge-primary {
  background: var(--primary-bg);
  color: var(--primary-dark);
}

/* Alerts */
.alert {
  padding: 12px 18px;
  border-radius: var(--border-radius);
  margin-bottom: 18px;
  font-size: 0.88rem;
  border: 1px solid transparent;
  border-left-width: 3px;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger-dark);
  border-left-color: var(--danger);
}

.alert-success {
  background: var(--success-light);
  color: var(--success-dark);
  border-left-color: var(--success);
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning-dark);
  border-left-color: var(--warning);
}

.alert-info {
  background: var(--info-light);
  color: var(--info);
  border-left-color: var(--info);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(12, 15, 20, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.15s ease;
}

.modal {
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
}

.modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.05rem;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  color: var(--text-secondary);
  display: flex;
}

.modal-close svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--text-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-dark {
  border-color: var(--border-color);
  border-top-color: var(--brand-600);
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(247, 248, 250, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  min-width: 300px;
  max-width: 400px;
  animation: slideIn 0.25s ease;
  border: 1px solid var(--border-color);
  font-size: 0.88rem;
}

.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }

.toast-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
}

.toast-hiding {
  animation: slideOut 0.25s ease;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-top: 20px;
}

.page-btn {
  padding: 7px 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
  font-size: 0.85rem;
}

.page-btn:hover:not(:disabled) {
  background: var(--brand-50);
  border-color: var(--brand-500);
}

.page-btn.active {
  background: var(--brand-600);
  color: var(--text-white);
  border-color: var(--brand-600);
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-dots {
  padding: 7px;
  color: var(--text-secondary);
}

/* Search */
.search-box {
  position: relative;
}

.search-box input {
  padding: 9px 15px 9px 38px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.88rem;
  width: 280px;
  transition: var(--transition);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.search-box input:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px var(--brand-100);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  display: flex;
}

.search-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

/* Filters */
.filters-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Text helpers */
.text-muted { color: var(--text-light); }
.text-success { color: var(--success-dark); font-weight: 600; }
.text-danger { color: var(--danger-dark); font-weight: 600; }

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

@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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

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

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

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .menu-toggle {
    display: flex;
  }

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

  .search-box input {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .header {
    padding: 0 16px;
  }

  .content {
    padding: 16px;
  }

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

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left,
  .toolbar-right {
    width: 100%;
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .header,
  .btn,
  .modal-overlay {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .content {
    padding: 0;
  }
}

/* ============================================
   Student Profile / View Modal Styles
   ============================================ */

.student-profile-header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  border-radius: var(--border-radius-lg);
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.student-avatar-large {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(155deg, var(--brand-500), var(--brand-700));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  flex-shrink: 0;
  overflow: hidden;
}

.student-avatar-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.student-header-info {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.student-header-info h2 {
  margin: 0;
  font-size: 1.25rem;
}

.student-id-badge {
  display: inline-block;
  width: fit-content;
  padding: 3px 11px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 15px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--brand-700);
  font-family: var(--font-mono);
}

/* Info Cards Grid */
.info-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.info-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.info-card:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border-color);
}

.info-card-icon {
  display: flex;
  color: var(--brand-600);
}

.info-card-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
}

.info-card-header h4 {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 600;
}

.info-card-body {
  padding: 15px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 9px 0;
  border-bottom: 1px solid var(--gray-100);
}

.info-row:last-child {
  border-bottom: none;
}

.info-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  min-width: 120px;
  flex-shrink: 0;
}

.info-value {
  font-size: 0.88rem;
  color: var(--text-primary);
  text-align: right;
  word-break: break-word;
  font-weight: 500;
}

.info-value a {
  color: var(--primary);
}

.info-value a:hover {
  text-decoration: underline;
}

.notes-text {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0;
}

.text-muted {
  color: var(--text-light);
  text-align: center;
  padding: 20px;
}

/* Enrollment Cards */
.enrollment-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.enrollment-card {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.enrollment-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 15px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--border-color);
}

.enrollment-card-header h5 {
  margin: 0 0 3px 0;
  font-size: 0.9rem;
}

.enrollment-card-header small {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.enrollment-card-body {
  padding: 15px;
}

.enrollment-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

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

.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-bottom: 3px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
}

/* Progress Bar */
.progress-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--brand-600);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* Timestamps */
.timestamps-info {
  text-align: center;
  padding: 12px 0 0 0;
  color: var(--text-light);
  font-size: 0.78rem;
}

/* Modal size for student view */
#viewStudentModal .modal {
  max-width: 800px;
}

/* Responsive */
@media (max-width: 768px) {
  .student-profile-header {
    flex-direction: column;
    text-align: center;
  }

  .info-cards-grid {
    grid-template-columns: 1fr;
  }

  .enrollment-stats {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .info-row {
    flex-direction: column;
    gap: 4px;
  }

  .info-value {
    text-align: left;
  }

  #viewStudentModal .modal {
    max-width: 95%;
  }
}


/* ============================================
   Batch Profile / View Modal Styles
   ============================================ */

.batch-profile-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 20px;
  background: linear-gradient(135deg, var(--brand-50), var(--slate-100));
  border-radius: var(--border-radius-lg);
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 20px;
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .batch-profile-header {
  background: linear-gradient(135deg, #10221D, #12202E);
}

.batch-header-left h2 {
  margin: 0 0 4px 0;
  font-size: 1.25rem;
}

.course-name {
  color: var(--text-secondary);
  margin: 0 0 10px 0;
  font-size: 0.92rem;
}

.batch-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.batch-header-right {
  text-align: right;
}

.batch-fee {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--brand-700);
  line-height: 1;
}

.batch-header-right small {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

/* View Batch Modal Size */
#viewBatchModal .modal {
  max-width: 900px;
  max-height: 90vh;
}

/* Batch Stats in Modal */
.batch-stats-mini {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 15px;
}

.batch-stat-mini {
  text-align: center;
  padding: 10px;
  background: var(--gray-50);
  border-radius: var(--border-radius);
}

.batch-stat-mini .stat-number {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--brand-700);
}

.batch-stat-mini .stat-text {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

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

  .batch-header-right {
    text-align: center;
    width: 100%;
  }

  .batch-stats-mini {
    grid-template-columns: repeat(2, 1fr);
  }

  #viewBatchModal .modal {
    max-width: 95%;
  }
}


/* ============================================
   Enrollment Profile / View Modal Styles
   ============================================ */

.enrollment-profile-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 20px;
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  border-radius: var(--border-radius-lg);
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 20px;
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .enrollment-profile-header {
  background: linear-gradient(135deg, #0F241D, #123024);
}

.enrollment-header-left h2 {
  margin: 0 0 4px 0;
  font-size: 1.25rem;
}

.enrollment-header-left p {
  color: var(--text-secondary);
  margin: 0 0 10px 0;
}

.enrollment-header-right {
  text-align: right;
}

.enrollment-fee {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--brand-700);
  line-height: 1;
}

.enrollment-header-right small {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

#viewEnrollmentModal .modal {
  max-width: 850px;
  max-height: 90vh;
}

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

  .enrollment-header-right {
    text-align: center;
    width: 100%;
  }

  #viewEnrollmentModal .modal {
    max-width: 95%;
  }
}


/* ============================================
   Payment Receipt Styles
   ============================================ */

.receipt-container {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.receipt-header {
  background: var(--brand-700);
  color: white;
  padding: 20px;
  text-align: center;
}

.receipt-header h2 {
  margin: 0;
  font-size: 1.3rem;
  color: white;
}

.receipt-number {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  opacity: 0.9;
}

.receipt-body {
  padding: 20px;
}

.receipt-section {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border-color);
}

.receipt-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.receipt-section h4 {
  margin: 0 0 12px 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  font-size: 0.9rem;
}

.receipt-row span:first-child {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.receipt-row.highlight {
  background: var(--brand-50);
  margin: 0 -10px;
  padding: 12px 10px;
  border-radius: var(--border-radius);
  font-weight: 600;
}

.receipt-footer {
  background: var(--gray-50);
  padding: 20px;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.receipt-footer .receipt-row {
  justify-content: center;
  gap: 10px;
}

.receipt-thanks {
  margin: 12px 0 6px;
  font-weight: 600;
  color: var(--brand-700);
  font-size: 0.98rem;
}

.receipt-footer small {
  color: var(--text-light);
  font-size: 0.74rem;
}

/* Print styles for receipt */
@media print {
  body * {
    visibility: hidden;
  }

  #viewPaymentModal,
  #viewPaymentModal * {
    visibility: visible;
  }

  #viewPaymentModal {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    background: white !important;
  }

  #viewPaymentModal .modal-overlay {
    background: white !important;
  }

  #viewPaymentModal .modal {
    box-shadow: none;
    border: none;
    width: 100%;
    max-width: 100%;
  }

  #viewPaymentModal .modal-footer,
  #viewPaymentModal .modal-close {
    display: none !important;
  }

  .receipt-container {
    border: 1px solid #000;
  }
}

#viewPaymentModal .modal {
  max-width: 650px;
}

@media (max-width: 768px) {
  #viewPaymentModal .modal {
    max-width: 95%;
  }
}

/* ============================================
   User Profile Styles
   ============================================ */

.user-profile-header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px;
  background: var(--gray-50);
  border-radius: var(--border-radius-lg);
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}

.user-avatar-large {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

#viewUserModal .modal {
  max-width: 500px;
}

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