/* =============================================================
   TechnicExam — Premium UI v2.0
   ============================================================= */

/* ---- CSS Variables (Light Mode) -------------------------- */
:root {
  --te-primary:        #4f46e5;
  --te-primary-dark:   #3730a3;
  --te-primary-light:  #818cf8;
  --te-secondary:      #06b6d4;
  --te-accent:         #10b981;
  --te-warning:        #f59e0b;
  --te-danger:         #ef4444;

  --te-bg:             #f1f5f9;
  --te-card-bg:        #ffffff;
  --te-sidebar-bg:     #1e1b4b;
  --te-sidebar-hover:  rgba(255,255,255,0.08);
  --te-sidebar-active: rgba(255,255,255,0.15);
  --te-navbar-bg:      #ffffff;

  --te-text:           #1e293b;
  --te-text-muted:     #64748b;
  --te-text-sidebar:   rgba(255,255,255,0.8);

  --te-border:         #e2e8f0;

  --te-shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --te-shadow:    0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --te-shadow-md: 0 10px 25px rgba(0,0,0,.09), 0 4px 10px rgba(0,0,0,.05);
  --te-shadow-lg: 0 20px 40px rgba(0,0,0,.12);

  --sidebar-width:     260px;
  --sidebar-collapsed: 68px;

  --te-radius:    .75rem;
  --te-radius-sm: .5rem;
  --te-radius-lg: 1rem;

  --te-transition: all .2s cubic-bezier(.4,0,.2,1);

  --grad-primary: linear-gradient(135deg,#4f46e5,#7c3aed);
  --grad-success: linear-gradient(135deg,#10b981,#059669);
  --grad-warning: linear-gradient(135deg,#f59e0b,#d97706);
  --grad-danger:  linear-gradient(135deg,#ef4444,#dc2626);
  --grad-info:    linear-gradient(135deg,#06b6d4,#0284c7);
  --grad-purple:  linear-gradient(135deg,#8b5cf6,#7c3aed);
  --grad-pink:    linear-gradient(135deg,#ec4899,#db2777);
}

/* ---- Dark Mode ------------------------------------------- */
[data-theme="dark"] {
  --te-bg:         #0f172a;
  --te-card-bg:    #1e293b;
  --te-sidebar-bg: #0d0b2e;
  --te-navbar-bg:  #1e293b;
  --te-text:       #e2e8f0;
  --te-text-muted: #94a3b8;
  --te-border:     #334155;
  --te-shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --te-shadow:    0 4px 6px rgba(0,0,0,.3);
  --te-shadow-md: 0 10px 25px rgba(0,0,0,.4);
}

/* ---- Base -------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { height: 100%; scroll-behavior: smooth; }

body {
  background: var(--te-bg);
  color: var(--te-text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: .9rem;
  line-height: 1.6;
  transition: background .3s ease, color .3s ease;
  min-height: 100vh;
}

/* ====================================================================
   APP SHELL
   ==================================================================== */

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ------------------------------------------------ */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--te-sidebar-bg);
  position: fixed;
  top: 0; left: 0;
  z-index: 1030;
  display: flex;
  flex-direction: column;
  transition: width .25s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
}

.sidebar.collapsed { width: var(--sidebar-collapsed); }

/* Brand */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1.1rem 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
  text-decoration: none;
  min-height: 65px;
  overflow: hidden;
  white-space: nowrap;
}

.sidebar-brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--grad-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(79,70,229,.45);
}

.sidebar-brand-text {
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: .3px;
  transition: opacity .2s ease, width .2s ease;
  white-space: nowrap;
}

.sidebar-brand-sub {
  font-size: .65rem;
  color: rgba(255,255,255,.45);
  margin-top: -2px;
}

/* Nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: .5rem 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.1) transparent;
}
.sidebar-nav::-webkit-scrollbar { width: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 2px; }

.sidebar-section-label {
  font-size: .62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,.32);
  padding: .85rem 1.2rem .35rem;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity .2s ease;
}

.sidebar.collapsed .sidebar-section-label { opacity: 0; height: 0; padding: 0; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem 1rem;
  color: var(--te-text-sidebar);
  text-decoration: none;
  transition: var(--te-transition);
  white-space: nowrap;
  overflow: hidden;
  margin: 1px .5rem;
  border-radius: .5rem;
  position: relative;
}

.sidebar-link:hover {
  background: var(--te-sidebar-hover);
  color: #fff;
}

.sidebar-link.active {
  background: var(--te-sidebar-active);
  color: #fff;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 55%;
  background: var(--te-primary-light);
  border-radius: 0 2px 2px 0;
  left: .5rem;
}

.sidebar-link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.sidebar-link-text {
  font-size: .855rem;
  font-weight: 500;
  transition: opacity .2s ease, width .2s ease;
  flex: 1;
}

.sidebar-chevron {
  margin-left: auto;
  transition: transform .2s ease;
  font-size: .72rem;
  opacity: .6;
}

.sidebar-link[aria-expanded="true"] .sidebar-chevron { transform: rotate(180deg); }

.sidebar.collapsed .sidebar-link-text,
.sidebar.collapsed .sidebar-chevron,
.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .sidebar-brand-sub {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

/* Submenu */
.sidebar-submenu {
  list-style: none;
  padding: 0;
  margin: 0;
  background: rgba(0,0,0,.15);
  overflow: hidden;
  max-height: 0;
  transition: max-height .3s ease;
}

.sidebar-submenu.open { max-height: 600px; }

.sidebar.collapsed .sidebar-submenu { display: none; }

.sidebar-submenu .sidebar-link {
  padding-left: 3.1rem;
  font-size: .82rem;
}

/* Tooltip on collapsed */
.sidebar.collapsed .sidebar-link {
  position: relative;
}

/* Footer */
.sidebar-footer {
  padding: .6rem;
  border-top: 1px solid rgba(255,255,255,.07);
}

.sidebar-footer .sidebar-link {
  margin: 0;
  border-radius: .5rem;
}

/* ---- Main Content ----------------------------------------- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin-left .25s cubic-bezier(.4,0,.2,1);
}

.main-content.expanded { margin-left: var(--sidebar-collapsed); }

/* ---- Top Navbar ------------------------------------------- */
.top-navbar {
  background: var(--te-navbar-bg);
  border-bottom: 1px solid var(--te-border);
  padding: 0 1.5rem;
  height: 65px;
  display: flex;
  align-items: center;
  gap: .75rem;
  position: sticky;
  top: 0;
  z-index: 1020;
  box-shadow: var(--te-shadow-sm);
  transition: background .3s ease, border-color .3s ease;
}

.navbar-toggle-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--te-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--te-transition);
  flex-shrink: 0;
}
.navbar-toggle-btn:hover { background: var(--te-bg); color: var(--te-text); }

/* Search */
.navbar-search {
  flex: 1;
  max-width: 340px;
}

.navbar-search .input-group {
  background: var(--te-bg);
  border-radius: 10px;
  border: 1px solid var(--te-border);
  overflow: hidden;
}

.navbar-search .form-control {
  background: transparent;
  border: none;
  padding: .4rem .7rem;
  font-size: .84rem;
  color: var(--te-text);
  box-shadow: none !important;
}

.navbar-search .form-control::placeholder { color: var(--te-text-muted); }

.navbar-search .input-group-text {
  background: transparent;
  border: none;
  color: var(--te-text-muted);
  padding: .4rem .75rem;
}

/* Right controls */
.navbar-controls {
  display: flex;
  align-items: center;
  gap: .35rem;
  margin-left: auto;
}

.navbar-icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--te-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--te-transition);
  text-decoration: none;
  position: relative;
}

.navbar-icon-btn:hover { background: var(--te-bg); color: var(--te-primary); }

.navbar-icon-btn .badge-dot {
  position: absolute;
  top: 7px; right: 7px;
  width: 8px; height: 8px;
  background: var(--te-danger);
  border-radius: 50%;
  border: 2px solid var(--te-navbar-bg);
}

/* User dropdown */
.navbar-user-btn {
  display: flex;
  align-items: center;
  gap: .55rem;
  cursor: pointer;
  padding: .3rem .55rem;
  border-radius: 10px;
  transition: var(--te-transition);
  border: none;
  background: transparent;
  text-decoration: none;
}

.navbar-user-btn:hover { background: var(--te-bg); }

.navbar-user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .83rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.avatar-admin      { background: var(--grad-danger); }
.avatar-super_admin{ background: var(--grad-danger); }
.avatar-teacher    { background: var(--grad-success); }
.avatar-student    { background: var(--grad-primary); }
.avatar-default    { background: var(--grad-info); }

.navbar-user-name {
  font-size: .845rem;
  font-weight: 600;
  color: var(--te-text);
  white-space: nowrap;
}

.navbar-user-role {
  font-size: .7rem;
  color: var(--te-text-muted);
  white-space: nowrap;
}

/* ---- Page Content ----------------------------------------- */
.page-content {
  flex: 1;
  padding: 1.75rem;
}

/* ---- Footer ----------------------------------------------- */
.app-footer {
  padding: .9rem 1.75rem;
  background: var(--te-navbar-bg);
  border-top: 1px solid var(--te-border);
  font-size: .78rem;
  color: var(--te-text-muted);
  text-align: center;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1029;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.active { display: block; }

/* ====================================================================
   PAGE HEADER
   ==================================================================== */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--te-text);
  margin: 0;
  line-height: 1.3;
}

.page-header-sub {
  font-size: .83rem;
  color: var(--te-text-muted);
  margin-top: .2rem;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

/* ====================================================================
   CARDS
   ==================================================================== */
.card {
  background: var(--te-card-bg);
  border: 1px solid var(--te-border);
  border-radius: var(--te-radius);
  box-shadow: var(--te-shadow-sm);
  transition: var(--te-transition);
}

.card:hover { box-shadow: var(--te-shadow); }

.card-header {
  background: transparent;
  border-bottom: 1px solid var(--te-border);
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--te-text);
}

.card-header.bg-white { background: transparent !important; }

.card-body { padding: 1.25rem; }

/* ====================================================================
   STAT CARDS
   ==================================================================== */
.stat-card {
  border: 1px solid var(--te-border);
  border-radius: var(--te-radius);
  background: var(--te-card-bg);
  padding: 1.35rem;
  position: relative;
  overflow: hidden;
  transition: var(--te-transition);
  box-shadow: var(--te-shadow-sm);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--te-shadow-md);
}

.stat-card .card-body {
  padding: 0;
}

/* Gradient variants */
.stat-card-primary { background: var(--grad-primary); border: none; color: #fff; }
.stat-card-success { background: var(--grad-success); border: none; color: #fff; }
.stat-card-warning { background: var(--grad-warning); border: none; color: #fff; }
.stat-card-danger  { background: var(--grad-danger);  border: none; color: #fff; }
.stat-card-info    { background: var(--grad-info);    border: none; color: #fff; }
.stat-card-purple  { background: var(--grad-purple);  border: none; color: #fff; }

.stat-card-bg-icon {
  position: absolute;
  right: -12px; top: -12px;
  font-size: 5rem;
  opacity: .1;
}

.stat-card-icon {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: .9rem;
}

.stat-icon { font-size: 2rem; opacity: .85; }

.si-primary { background: rgba(79,70,229,.12); color: var(--te-primary); }
.si-success { background: rgba(16,185,129,.12); color: var(--te-accent); }
.si-warning { background: rgba(245,158,11,.12); color: var(--te-warning); }
.si-danger  { background: rgba(239,68,68,.12);  color: var(--te-danger); }
.si-info    { background: rgba(6,182,212,.12);  color: var(--te-secondary); }
.si-purple  { background: rgba(139,92,246,.12); color: #8b5cf6; }

.stat-card-primary .stat-card-icon { background: rgba(255,255,255,.2); }
.stat-card-success .stat-card-icon { background: rgba(255,255,255,.2); }
.stat-card-warning .stat-card-icon { background: rgba(255,255,255,.2); }
.stat-card-danger  .stat-card-icon { background: rgba(255,255,255,.2); }
.stat-card-info    .stat-card-icon { background: rgba(255,255,255,.2); }

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: .3rem;
  color: var(--te-text);
}

.stat-label {
  font-size: .79rem;
  color: var(--te-text-muted);
  font-weight: 500;
}

.stat-card-primary .stat-value,
.stat-card-success .stat-value,
.stat-card-warning .stat-value,
.stat-card-danger  .stat-value,
.stat-card-info    .stat-value,
.stat-card-purple  .stat-value { color: #fff; }

.stat-card-primary .stat-label,
.stat-card-success .stat-label,
.stat-card-warning .stat-label,
.stat-card-danger  .stat-label,
.stat-card-info    .stat-label,
.stat-card-purple  .stat-label { color: rgba(255,255,255,.8); }

/* ====================================================================
   TABLES
   ==================================================================== */
.table {
  color: var(--te-text);
  --bs-table-hover-bg: rgba(79,70,229,.04);
  --bs-table-striped-bg: rgba(241,245,249,.5);
}

.table th {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .6px;
  white-space: nowrap;
  color: var(--te-text-muted);
  border-bottom-width: 1px;
  padding: .7rem 1rem;
}

.table td {
  vertical-align: middle;
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--te-border);
  color: var(--te-text);
}

.table-light th, .table-light {
  background: var(--te-bg) !important;
  color: var(--te-text-muted);
}

.table-hover > tbody > tr:hover > td { background: rgba(79,70,229,.04); }

[data-theme="dark"] .table-light th,
[data-theme="dark"] .table-light { background: rgba(255,255,255,.04) !important; }

[data-theme="dark"] .table-hover > tbody > tr:hover > td { background: rgba(255,255,255,.04); }

/* ====================================================================
   BUTTONS
   ==================================================================== */
.btn {
  border-radius: 8px;
  font-weight: 600;
  font-size: .855rem;
  padding: .5rem 1rem;
  transition: var(--te-transition);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}

.btn-primary {
  background: var(--grad-primary);
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(79,70,229,.3);
}
.btn-primary:hover, .btn-primary:focus {
  background: linear-gradient(135deg,#3730a3,#6d28d9);
  box-shadow: 0 6px 16px rgba(79,70,229,.4);
  transform: translateY(-1px);
  color: #fff;
}

.btn-success {
  background: var(--grad-success);
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(16,185,129,.3);
}
.btn-success:hover, .btn-success:focus {
  background: linear-gradient(135deg,#059669,#047857);
  box-shadow: 0 6px 16px rgba(16,185,129,.4);
  transform: translateY(-1px);
  color: #fff;
}

.btn-danger {
  background: var(--grad-danger);
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(239,68,68,.3);
}
.btn-danger:hover, .btn-danger:focus {
  background: linear-gradient(135deg,#dc2626,#b91c1c);
  transform: translateY(-1px);
  color: #fff;
}

.btn-warning {
  background: var(--grad-warning);
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(245,158,11,.3);
}
.btn-warning:hover, .btn-warning:focus {
  background: linear-gradient(135deg,#d97706,#b45309);
  transform: translateY(-1px);
  color: #fff;
}

.btn-info {
  background: var(--grad-info);
  border: none;
  color: #fff;
  box-shadow: 0 4px 12px rgba(6,182,212,.3);
}
.btn-info:hover, .btn-info:focus {
  background: linear-gradient(135deg,#0284c7,#0369a1);
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline-primary {
  color: var(--te-primary);
  border-color: var(--te-primary);
  background: transparent;
}
.btn-outline-primary:hover {
  background: var(--te-primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline-secondary {
  color: var(--te-text-muted);
  border-color: var(--te-border);
  background: transparent;
}
.btn-outline-secondary:hover {
  background: var(--te-bg);
  color: var(--te-text);
  border-color: var(--te-border);
}

.btn-sm { padding: .35rem .75rem; font-size: .79rem; border-radius: 6px; }
.btn-lg { padding: .7rem 1.5rem; font-size: .95rem; border-radius: 10px; }

.btn-icon {
  width: 34px; height: 34px;
  padding: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ====================================================================
   FORMS
   ==================================================================== */
.form-control, .form-select {
  background: var(--te-card-bg);
  border: 1.5px solid var(--te-border);
  border-radius: 8px;
  color: var(--te-text);
  padding: .55rem .9rem;
  font-size: .875rem;
  transition: var(--te-transition);
}

.form-control:focus, .form-select:focus {
  background: var(--te-card-bg);
  border-color: var(--te-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
  color: var(--te-text);
}

.form-control::placeholder { color: var(--te-text-muted); }

.form-label {
  font-size: .825rem;
  font-weight: 600;
  color: var(--te-text);
  margin-bottom: .4rem;
}

.form-text { font-size: .78rem; color: var(--te-text-muted); }

.form-check-input:checked {
  background-color: var(--te-primary);
  border-color: var(--te-primary);
}

.input-group-text {
  background: var(--te-bg);
  border-color: var(--te-border);
  color: var(--te-text-muted);
  border-radius: 8px;
}

.input-group > .form-control { border-radius: 8px !important; }
.input-group > :not(:last-child):not(.dropdown-toggle) { border-radius: 8px 0 0 8px !important; }
.input-group > :last-child:not(.dropdown-toggle) { border-radius: 0 8px 8px 0 !important; }
.input-group > .input-group-text { border-radius: 0 !important; }
.input-group > :first-child.input-group-text { border-radius: 8px 0 0 8px !important; }
.input-group > :last-child.input-group-text  { border-radius: 0 8px 8px 0 !important; }

/* ====================================================================
   BADGES
   ==================================================================== */
.badge {
  font-size: .72rem;
  font-weight: 600;
  padding: .28em .65em;
  border-radius: 20px;
  letter-spacing: .15px;
}

.badge.bg-primary { background: var(--te-primary) !important; }
.badge.bg-success { background: var(--te-accent)  !important; }
.badge.bg-danger  { background: var(--te-danger)  !important; }
.badge.bg-warning { background: var(--te-warning) !important; color:#fff !important; }
.badge.bg-info    { background: var(--te-secondary)!important; }

/* ====================================================================
   ALERTS
   ==================================================================== */
.alert {
  border-radius: var(--te-radius-sm);
  border: none;
  font-size: .875rem;
  padding: .875rem 1.1rem;
}

.alert-success { background: rgba(16,185,129,.1);  color: #065f46; border-left: 4px solid var(--te-accent); }
.alert-danger  { background: rgba(239,68,68,.1);   color: #7f1d1d; border-left: 4px solid var(--te-danger); }
.alert-warning { background: rgba(245,158,11,.1);  color: #78350f; border-left: 4px solid var(--te-warning); }
.alert-info    { background: rgba(6,182,212,.1);   color: #164e63; border-left: 4px solid var(--te-secondary); }

[data-theme="dark"] .alert-success { color: #6ee7b7; background: rgba(16,185,129,.12); }
[data-theme="dark"] .alert-danger  { color: #fca5a5; background: rgba(239,68,68,.12); }
[data-theme="dark"] .alert-warning { color: #fde68a; background: rgba(245,158,11,.12); }
[data-theme="dark"] .alert-info    { color: #a5f3fc; background: rgba(6,182,212,.12); }

/* Alert auto-dismiss */
.alert-autohide { animation: fadeout .5s ease 5s forwards; }

@keyframes fadeout { to { opacity: 0; pointer-events: none; } }

/* Toast */
.toast-container-premium {
  position: fixed;
  top: 80px; right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  width: 320px;
}

.toast-premium {
  background: var(--te-card-bg);
  border: 1px solid var(--te-border);
  border-radius: var(--te-radius);
  box-shadow: var(--te-shadow-md);
  padding: .9rem 1rem;
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  animation: slideInRight .3s ease;
}

.toast-premium.hiding { animation: slideOutRight .3s ease forwards; }

.toast-icon {
  width: 34px; height: 34px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: .95rem;
}

.ti-success { background: rgba(16,185,129,.12); color: var(--te-accent); }
.ti-danger  { background: rgba(239,68,68,.12);  color: var(--te-danger); }
.ti-warning { background: rgba(245,158,11,.12); color: var(--te-warning); }
.ti-info    { background: rgba(6,182,212,.12);  color: var(--te-secondary); }

.toast-body-inner { flex: 1; min-width: 0; }
.toast-title   { font-weight: 700; font-size: .855rem; color: var(--te-text); }
.toast-message { font-size: .79rem; color: var(--te-text-muted); margin-top: .1rem; }
.toast-close   { margin-left: auto; background: none; border: none; color: var(--te-text-muted); cursor: pointer; padding: 0; font-size: 1rem; flex-shrink: 0; }

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

/* ====================================================================
   MODALS
   ==================================================================== */
.modal-content {
  background: var(--te-card-bg);
  border: 1px solid var(--te-border);
  border-radius: var(--te-radius-lg);
  box-shadow: var(--te-shadow-lg);
}

.modal-header { border-bottom: 1px solid var(--te-border); padding: 1.2rem 1.5rem; }
.modal-footer { border-top:    1px solid var(--te-border); padding: 1rem 1.5rem; }
.modal-body   { padding: 1.5rem; color: var(--te-text); }
.modal-title  { font-weight: 700; font-size: 1rem; color: var(--te-text); }

[data-theme="dark"] .btn-close { filter: invert(1); }

/* ====================================================================
   LOGIN PAGE
   ==================================================================== */
.login-page {
  min-height: 100vh;
  display: flex;
  background: var(--te-bg);
}

.login-illustration {
  flex: 1;
  background: linear-gradient(145deg,#1e1b4b 0%,#4f46e5 55%,#7c3aed 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  position: relative;
  overflow: hidden;
}

.login-illustration::before {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,.05);
  top: -120px; right: -120px;
}

.login-illustration::after {
  content: '';
  position: absolute;
  width: 350px; height: 350px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  bottom: -60px; left: -60px;
}

.login-illustration-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  max-width: 380px;
}

.login-float-icon {
  font-size: 5.5rem;
  margin-bottom: 1.5rem;
  display: block;
  animation: floatAnim 3s ease-in-out infinite;
  filter: drop-shadow(0 12px 24px rgba(0,0,0,.25));
}

@keyframes floatAnim {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}

.login-ill-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: .75rem;
  letter-spacing: -.5px;
}

.login-ill-text { font-size: .92rem; opacity: .8; line-height: 1.6; }

.login-features {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-top: 2rem;
  text-align: left;
}

.login-feature-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: rgba(255,255,255,.1);
  border-radius: .6rem;
  padding: .65rem 1rem;
  font-size: .85rem;
}

.login-feature-item i { font-size: 1.1rem; opacity: .9; }

/* Form side */
.login-form-side {
  width: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
  background: var(--te-card-bg);
  overflow-y: auto;
}

.login-form-box { width: 100%; max-width: 380px; }

.login-logo {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 2rem;
}

.login-logo-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  background: var(--grad-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.35rem;
  box-shadow: 0 6px 16px rgba(79,70,229,.4);
}

.login-heading { font-size: 1.55rem; font-weight: 800; color: var(--te-text); margin-bottom: .3rem; line-height: 1.2; }
.login-subhead { font-size: .875rem; color: var(--te-text-muted); margin-bottom: 1.75rem; }

/* ====================================================================
   EMPTY STATES
   ==================================================================== */
.empty-state {
  text-align: center;
  padding: 3.5rem 2rem;
  color: var(--te-text-muted);
}

.empty-state-icon { font-size: 3.5rem; opacity: .2; display: block; margin-bottom: .9rem; }
.empty-state-title { font-size: .95rem; font-weight: 700; color: var(--te-text); margin-bottom: .4rem; }
.empty-state-text  { font-size: .82rem; max-width: 300px; margin: 0 auto; }

/* ====================================================================
   EXAM INTERFACE
   ==================================================================== */
.exam-option {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .9rem 1.1rem;
  border: 2px solid var(--te-border);
  border-radius: var(--te-radius-sm);
  cursor: pointer;
  transition: var(--te-transition);
  user-select: none;
  background: var(--te-card-bg);
}

.exam-option:hover { border-color: var(--te-primary); background: rgba(79,70,229,.04); }
.exam-option-selected { border-color: var(--te-primary); background: rgba(79,70,229,.08); }
.exam-option-radio { display: none; }

.exam-option-letter {
  width: 2rem; height: 2rem;
  border-radius: 50%;
  background: var(--te-bg);
  color: var(--te-text);
  font-weight: 700;
  font-size: .875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--te-transition);
}

.exam-option-selected .exam-option-letter { background: var(--te-primary); color: #fff; }

.exam-option-text { font-size: .95rem; line-height: 1.4; color: var(--te-text); }

/* Timer */
.exam-timer-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem 1rem;
  border-radius: 20px;
  background: var(--te-bg);
  border: 1.5px solid var(--te-border);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--te-text);
  transition: var(--te-transition);
}

.exam-timer-warning { background: rgba(245,158,11,.1); border-color: var(--te-warning); color: #92400e; }
.exam-timer-urgent  { background: rgba(239,68,68,.1);  border-color: var(--te-danger);  color: #7f1d1d; animation: timerPulse 1s ease-in-out infinite; }

@keyframes timerPulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.03)} }

/* Nav dots */
.exam-dot {
  width: 2.1rem; height: 2.1rem;
  border-radius: 8px;
  font-size: .75rem; font-weight: 700;
  text-decoration: none;
  background: var(--te-bg);
  color: var(--te-text-muted);
  border: 1.5px solid var(--te-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--te-transition);
}

.exam-dot:hover { background: var(--te-primary); color: #fff; border-color: var(--te-primary); }
.exam-dot-answered { background: rgba(16,185,129,.12); color: #065f46; border-color: #a7f3d0; }
.exam-dot-current  { background: var(--te-primary); color: #fff; border-color: var(--te-primary); }

/* Score circle */
.score-circle {
  width: 120px; height: 120px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 5px solid var(--te-border);
}

.score-circle-pass { border-color: var(--te-accent); background: rgba(16,185,129,.1); }
.score-circle-fail { border-color: var(--te-danger);  background: rgba(239,68,68,.1); }
.score-circle-value { font-size: 1.85rem; font-weight: 800; line-height: 1; color: var(--te-text); }
.score-circle-unit  { font-size: .875rem; font-weight: 600; color: var(--te-text-muted); }

/* ====================================================================
   LEADERBOARD / CERTIFICATE / MISC
   ==================================================================== */
.leaderboard-rank-gold   { background: linear-gradient(135deg,#fffbeb,#fde68a); }
.leaderboard-rank-silver { background: linear-gradient(135deg,#f8fafc,#e2e8f0); }
.leaderboard-rank-bronze { background: linear-gradient(135deg,#fff7ed,#fed7aa); }

.cert-wrapper { max-width: 860px; margin: 2rem auto; }

.attempts-score-bar { height: 6px; border-radius: 3px; background: var(--te-border); overflow: hidden; min-width: 60px; }

.audit-action-login    { background: rgba(79,70,229,.1)  !important; color: #3730a3 !important; }
.audit-action-delete   { background: rgba(239,68,68,.1)  !important; color: #7f1d1d !important; }
.audit-action-settings { background: rgba(245,158,11,.1) !important; color: #78350f !important; }

.report-stat-value { font-size: 1.75rem; font-weight: 800; line-height: 1.2; }

.color-preview { display: inline-block; width: 24px; height: 24px; border-radius: 4px; border: 1px solid rgba(0,0,0,.1); vertical-align: middle; }

.super-admin-badge { background: var(--grad-danger); color: #fff; padding: .2rem .6rem; border-radius: 1rem; font-size: .7rem; font-weight: 700; letter-spacing: .5px; text-transform: uppercase; }

.restore-drop-zone { border: 2px dashed var(--te-border); border-radius: var(--te-radius-sm); padding: 2rem; text-align: center; cursor: pointer; transition: var(--te-transition); }
.restore-drop-zone:hover { border-color: var(--te-primary); background: rgba(79,70,229,.03); }

.maintenance-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1.5rem; }

#pwaInstallBanner { position: fixed; bottom: 1rem; right: 1rem; z-index: 1055; max-width: 320px; box-shadow: var(--te-shadow-md); border-radius: var(--te-radius); display: none; }

.exam-fs-overlay { position: fixed; inset: 0; background: rgba(220,53,69,.95); z-index: 9999; display: flex; align-items: center; justify-content: center; flex-direction: column; color: #fff; text-align: center; }
#tabWarningModal .modal-content { border: 2px solid var(--te-danger); }

.teacher-own-badge { font-size: .65rem; padding: .15rem .4rem; vertical-align: middle; }
td .schedule-info  { font-size: .72rem; line-height: 1.4; }
.schedule-badge-upcoming, .schedule-badge-open, .schedule-badge-expired { font-size: .7rem; }
.word-break-all { word-break: break-all; }

/* ====================================================================
   ANIMATIONS
   ==================================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-content > *:not(script) { animation: fadeInUp .35s ease both; }
.page-content > *:nth-child(2) { animation-delay: .05s; }
.page-content > *:nth-child(3) { animation-delay: .1s; }
.page-content > *:nth-child(4) { animation-delay: .15s; }

/* ====================================================================
   DARK MODE OVERRIDES
   ==================================================================== */
[data-theme="dark"] { color-scheme: dark; }

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select { background: var(--te-card-bg); border-color: var(--te-border); color: var(--te-text); }

[data-theme="dark"] .input-group-text { background: rgba(255,255,255,.05); border-color: var(--te-border); color: var(--te-text-muted); }

[data-theme="dark"] .bg-white { background: var(--te-card-bg) !important; }
[data-theme="dark"] .bg-light { background: rgba(255,255,255,.04) !important; }

[data-theme="dark"] .dropdown-menu { background: var(--te-card-bg); border-color: var(--te-border); box-shadow: var(--te-shadow-md); }
[data-theme="dark"] .dropdown-item { color: var(--te-text); }
[data-theme="dark"] .dropdown-item:hover { background: rgba(255,255,255,.06); }
[data-theme="dark"] .dropdown-divider { border-color: var(--te-border); }

[data-theme="dark"] .list-group-item { background: var(--te-card-bg); border-color: var(--te-border); color: var(--te-text); }

[data-theme="dark"] .text-muted { color: var(--te-text-muted) !important; }
[data-theme="dark"] .text-dark  { color: var(--te-text) !important; }

[data-theme="dark"] .border, [data-theme="dark"] .border-top, [data-theme="dark"] .border-bottom { border-color: var(--te-border) !important; }

[data-theme="dark"] .navbar-search .input-group { background: rgba(255,255,255,.05); border-color: var(--te-border); }

/* ====================================================================
   RESPONSIVE
   ==================================================================== */
@media (max-width: 991.98px) {
  .sidebar { transform: translateX(-100%); width: var(--sidebar-width) !important; }
  .sidebar.mobile-open { transform: translateX(0); }
  .main-content { margin-left: 0 !important; }
  .login-illustration { display: none; }
  .login-form-side { width: 100%; }
}

@media (max-width: 767.98px) {
  .page-content { padding: 1.1rem; }
  .top-navbar { padding: 0 1rem; }
  .navbar-search { display: none; }
}

@media (max-width: 576px) {
  .stat-card { padding: 1rem; }
  .stat-value { font-size: 1.5rem; }
  .exam-dot { width: 1.75rem; height: 1.75rem; font-size: .7rem; border-radius: 6px; }
  #pwaInstallBanner { right: .5rem; left: .5rem; max-width: none; }
}

@media print {
  .sidebar, .top-navbar, .app-footer, .btn, .alert { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .page-content { padding: 0 !important; }
}

/* ====================================================================
   BACKWARD COMPAT — old page-header pattern used in many pages
   ==================================================================== */
/* Old: <div class="d-flex justify-content-between align-items-center mb-4"> */
.d-flex.justify-content-between.align-items-center.mb-4 > div > h2.fw-bold,
.d-flex.justify-content-between.align-items-center.mb-4 > div > h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--te-text);
}

.d-flex.justify-content-between.align-items-center.mb-4 > div > small.text-muted {
  font-size: .83rem;
  color: var(--te-text-muted) !important;
}

/* ====================================================================
   BACKWARD COMPAT — forgot/reset password standalone pages
   ==================================================================== */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg,#1e1b4b 0%,#4f46e5 55%,#7c3aed 100%);
  padding: 1rem;
}

.login-card {
  width: 100%;
  max-width: 440px;
  border: none;
  border-radius: var(--te-radius-lg);
  box-shadow: var(--te-shadow-lg);
  overflow: hidden;
  background: var(--te-card-bg);
}

.login-card-header {
  background: var(--grad-primary);
  color: #fff;
  padding: 2rem 2rem 1.5rem;
  text-align: center;
}

.login-card-header .logo-icon { font-size: 3rem; display: block; margin-bottom: .5rem; }
.login-card-header h1 { font-size: 1.5rem; font-weight: 700; margin: 0; letter-spacing: .5px; }
.login-card-header p  { font-size: .85rem; opacity: .85; margin: .25rem 0 0; }

.login-card-body {
  padding: 2rem;
  background: var(--te-card-bg);
}

.login-card-body .form-label { font-weight: 600; font-size: .875rem; }
.login-card-body .form-control { border-radius: .5rem; }
.login-card-body .btn-login { border-radius: .5rem; font-weight: 600; }