/* ============================================================
   Sipway LMS - Complete Stylesheet
   Primary: Red (#cc0000), Black (#111), White (#fff)
   ============================================================ */

/* ---- CSS Variables ---- */
:root {
  --primary: #cc0000;
  --primary-dark: #990000;
  --primary-light: #ff3333;
  --sidebar-w: 260px;
  --navbar-h: 64px;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
  /* Light theme */
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface2: #f8f9fa;
  --border: #e2e6ea;
  --text: #212529;
  --text-muted: #6c757d;
  --sidebar-bg: #111111;
  --sidebar-text: #c9d1d9;
  --sidebar-hover: rgba(204,0,0,0.15);
  --sidebar-active: #cc0000;
  --shadow: 0 2px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}
[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --sidebar-bg: #010409;
  --sidebar-text: #8b949e;
  --sidebar-hover: rgba(204,0,0,0.2);
  --sidebar-active: #cc0000;
  --shadow: 0 2px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
}

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); transition: background var(--transition), color var(--transition); }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
.lms-body { display: flex; min-height: 100vh; }

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  height: 100vh;
  position: fixed;
  top: 0; left: 0;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 1040;
  transition: transform var(--transition);
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: #333 transparent;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }

.sidebar-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  min-height: 64px;
}
.brand-link { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-logo-card {
  background: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.25);
  transition: transform var(--transition);
}
.brand-link:hover .brand-logo-card { transform: scale(1.03); }
.brand-logo { height: 38px; width: auto; max-width: 168px; object-fit: contain; display: block; }
.brand-text { font-size: 1rem; font-weight: 700; color: #fff; letter-spacing: 0.3px; }

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.03);
}
.user-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary); flex-shrink: 0; }
.user-info { overflow: hidden; }
.user-name { font-size: 0.875rem; font-weight: 600; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 0.72rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; color: var(--primary-light); }

.sidebar-nav { padding: 12px 0; flex: 1; }
.nav-section-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.3);
  padding: 14px 20px 4px;
}
.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-text);
  font-size: 0.875rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}
.sidebar-nav .nav-link:hover { background: var(--sidebar-hover); color: #fff; border-left-color: rgba(204,0,0,0.5); }
.sidebar-nav .nav-link.active { background: rgba(204,0,0,0.18); color: #fff; border-left-color: var(--primary); font-weight: 600; }
.nav-icon { width: 18px; text-align: center; font-size: 0.9rem; flex-shrink: 0; }
.nav-label { flex: 1; }
.sidebar-toggle-btn { background: none; border: none; color: #fff; font-size: 1.2rem; cursor: pointer; padding: 4px; }

/* ---- Sidebar Overlay ---- */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1039; }
.sidebar-overlay.show { display: block; }

/* ---- Main Content ---- */
.main-wrapper { margin-left: var(--sidebar-w); flex: 1; min-height: 100vh; transition: margin-left var(--transition); display: flex; flex-direction: column; }

/* ---- Top Navbar ---- */
.top-navbar {
  height: var(--navbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: var(--shadow);
}
.navbar-left { display: flex; align-items: center; gap: 16px; }
.navbar-right { display: flex; align-items: center; gap: 8px; }

.sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.sidebar-toggle:hover { background: var(--surface2); color: var(--primary); }

.page-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.breadcrumb { font-size: 0.78rem; }
.breadcrumb-item+.breadcrumb-item::before { content: "›"; }
.breadcrumb-item a { color: var(--text-muted); }
.breadcrumb-item.active { color: var(--primary); }

.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.95rem;
}
.theme-toggle-btn:hover { background: var(--surface2); color: var(--primary); border-color: var(--primary); }

.nav-icon-btn {
  position: relative;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.95rem;
}
.nav-icon-btn:hover { background: var(--surface2); color: var(--primary); border-color: var(--primary); }
.nav-badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--primary);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  min-width: 16px; height: 16px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  padding: 0 3px;
}

.user-dropdown-btn {
  display: flex; align-items: center; gap: 8px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.875rem;
  font-weight: 500;
}
.user-dropdown-btn:hover { background: var(--surface2); border-color: var(--primary); color: var(--primary); }
.dropdown-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }
.dropdown-menu { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); min-width: 200px; }
.dropdown-item { color: var(--text); font-size: 0.875rem; padding: 8px 16px; }
.dropdown-item:hover { background: var(--surface2); color: var(--primary); }
.dropdown-divider { border-color: var(--border); }

/* ---- Notifications Dropdown ---- */
.notif-dropdown { min-width: 320px; max-height: 420px; overflow-y: auto; }
.dropdown-header { padding: 12px 16px; font-size: 0.875rem; border-bottom: 1px solid var(--border); background: var(--surface2); color: var(--text); }
.notif-empty { padding: 32px 16px; text-align: center; color: var(--text-muted); }
.notif-empty i { font-size: 2rem; margin-bottom: 8px; display: block; }
.notif-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  color: var(--text);
  text-decoration: none;
}
.notif-item:hover { background: var(--surface2); }
.notif-item.unread { background: rgba(204,0,0,0.04); }
.notif-icon { width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.875rem; flex-shrink: 0; background: var(--surface2); }
.notif-body { flex: 1; }
.notif-title { font-size: 0.8rem; font-weight: 500; color: var(--text); }
.notif-time { font-size: 0.72rem; color: var(--text-muted); }

/* ---- Page Content ---- */
.page-content { padding: 24px; flex: 1; }

/* ---- Cards ---- */
.card-lms {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header-lms {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
}

/* ---- Stat Cards ---- */
.stat-card {
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: default;
  text-decoration: none !important;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-red { background: linear-gradient(135deg, #cc0000, #ff3333); color: #fff; }
.stat-dark { background: linear-gradient(135deg, #1a1a2e, #16213e); color: #fff; }
[data-theme="dark"] .stat-dark { background: linear-gradient(135deg, #21262d, #30363d); }
.stat-icon { font-size: 2rem; opacity: 0.85; }
.stat-number { font-size: 1.8rem; font-weight: 800; line-height: 1; }
.stat-label { font-size: 0.8rem; opacity: 0.85; margin-top: 2px; }

/* ---- Tables ---- */
.table-lms { color: var(--text); margin-bottom: 0; }
.table-lms thead th { background: var(--surface2); border-color: var(--border); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); padding: 12px 16px; white-space: nowrap; }
.table-lms tbody td { border-color: var(--border); padding: 12px 16px; vertical-align: middle; font-size: 0.875rem; }
.table-lms tbody tr:hover { background: var(--surface2); }
.table-avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }

/* ---- Forms ---- */
.form-control, .form-select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.875rem;
  transition: all var(--transition);
}
.form-control:focus, .form-select:focus {
  background: var(--surface);
  border-color: var(--primary);
  color: var(--text);
  box-shadow: 0 0 0 3px rgba(204,0,0,0.12);
}
.form-label { font-size: 0.875rem; color: var(--text); margin-bottom: 6px; }
.input-icon-wrapper { position: relative; }
.input-icon-wrapper .form-control-modern { padding-left: 40px; }
.input-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.9rem; pointer-events: none; }
.password-toggle { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 4px; }

/* ---- Buttons ---- */
.btn-sipway { background: var(--primary); color: #fff; border: none; font-weight: 600; transition: all var(--transition); }
.btn-sipway:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(204,0,0,0.35); }
.btn-sipway:active { transform: translateY(0); }
.btn-sipway:disabled { opacity: 0.6; transform: none; }
.btn-outline-danger { border-color: var(--primary); color: var(--primary); }
.btn-outline-danger:hover { background: var(--primary); color: #fff; }

/* ---- Status Badges ---- */
.badge { font-size: 0.72rem; font-weight: 600; padding: 4px 8px; border-radius: 6px; }
.badge-role-admin { color: var(--primary); }
.badge-role-lecturer { color: #0d6efd; }
.badge-role-student { color: #198754; }

/* ---- Activity Feed ---- */
.activity-feed { list-style: none; padding: 0; margin: 0; }
.activity-item { display: flex; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); align-items: flex-start; }
.activity-dot { width: 10px; height: 10px; background: var(--primary); border-radius: 50%; margin-top: 5px; flex-shrink: 0; }
.activity-body { font-size: 0.875rem; color: var(--text); }

/* ---- Online Badge ---- */
.online-badge { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-muted); padding: 4px 12px; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); }
.online-dot { width: 8px; height: 8px; background: #28a745; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:0.5;transform:scale(1.3);} }

/* ---- List Group (dark theme) ---- */
.list-group-item { background: var(--surface); border-color: var(--border); color: var(--text); }
.list-group-item:hover { background: var(--surface2); }
.list-group-item.active { background: var(--primary); border-color: var(--primary); }
.list-group-item-lms { background: var(--surface); border-color: var(--border); color: var(--text); }

/* ---- Accordion ---- */
.accordion-button { background: var(--surface2); color: var(--text); font-weight: 600; }
.accordion-button:not(.collapsed) { background: rgba(204,0,0,0.08); color: var(--primary); box-shadow: none; }
.accordion-button::after { filter: var(--bs-body-color,none); }
.accordion-body { background: var(--surface); }
[data-theme="dark"] .accordion-button::after { filter: invert(1); }

/* ---- Material Icon ---- */
.material-type-icon { font-size: 1.4rem; width: 32px; text-align: center; flex-shrink: 0; }

/* ---- Progress Bar ---- */
.progress { background: var(--border); }

/* ---- Quiz ---- */
.question-block { background: var(--surface); border-color: var(--border) !important; border-radius: var(--radius) !important; }
.quiz-timer { display: flex; align-items: center; gap: 6px; font-size: 1rem; }

/* ---- Login Page ---- */
.login-page { min-height: 100vh; background: var(--bg); display: flex; }
.login-container { display: flex; width: 100%; min-height: 100vh; }
.login-left {
  flex: 0 0 45%;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a0000 50%, #cc0000 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  position: relative;
  overflow: hidden;
}
.login-left::before { content: ''; position: absolute; inset: 0; background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"); }
.login-left-content { position: relative; z-index: 1; color: #fff; max-width: 400px; }
.login-logo-large { height: auto; width: 280px; max-width: 90%; margin-bottom: 28px; filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3)); }
.login-tagline { font-size: 2rem; font-weight: 800; line-height: 1.2; margin-bottom: 16px; }
.login-desc { font-size: 1rem; opacity: 0.8; margin-bottom: 32px; line-height: 1.6; }
.login-features { display: flex; flex-direction: column; gap: 10px; }
.login-feature { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; opacity: 0.9; }
.login-feature i { color: #ff6666; }
.login-right { flex: 1; display: flex; align-items: center; justify-content: center; padding: 24px; background: var(--bg); }
.login-form-wrapper { width: 100%; max-width: 420px; }
.login-logo-mobile { height: auto; width: 200px; max-width: 85%; }
.login-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-lg); }
.login-title { font-size: 1.6rem; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.login-subtitle { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 24px; }
.form-control-modern { border-radius: var(--radius-sm); }
/* ---- Login Footer ---- */
.login-footer { text-align: center; color: var(--text-muted); font-size: 0.78rem; margin-top: 16px; }

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.show { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .page-content { padding: 16px; }
  .login-left { display: none !important; }
  .login-right { flex: 1; }
  .stat-card { padding: 14px; }
  .stat-number { font-size: 1.4rem; }
}
@media (max-width: 575.98px) {
  .top-navbar { padding: 0 12px; }
  .page-content { padding: 12px; }
  .stat-number { font-size: 1.2rem; }
}

/* ============================================================
   DARK MODE — Comprehensive overrides
   Covers Bootstrap 5 CSS variables + every UI component
   ============================================================ */

/* ---- 1. Override Bootstrap's own CSS custom properties ---- */
[data-theme="dark"] {
  --bs-body-bg:              var(--bg);
  --bs-body-color:           var(--text);
  --bs-border-color:         var(--border);
  --bs-border-color-translucent: rgba(255,255,255,0.1);
  --bs-secondary-color:      var(--text-muted);
  --bs-tertiary-color:       var(--text-muted);
  --bs-tertiary-bg:          var(--surface2);
  --bs-secondary-bg:         var(--surface2);
  --bs-emphasis-color:       #ffffff;
  --bs-link-color:           #ff6b6b;
  --bs-link-hover-color:     #ff9999;
  --bs-table-bg:             transparent;
  --bs-table-color:          var(--text);
  --bs-table-border-color:   var(--border);
  --bs-table-striped-bg:     rgba(255,255,255,0.03);
  --bs-table-hover-bg:       rgba(255,255,255,0.05);
  --bs-table-active-bg:      rgba(255,255,255,0.08);
  --bs-card-bg:              var(--surface);
  --bs-card-border-color:    var(--border);
  --bs-modal-bg:             var(--surface);
  --bs-modal-border-color:   var(--border);
  --bs-modal-header-border-color: var(--border);
  --bs-modal-footer-border-color: var(--border);
  --bs-nav-link-color:       var(--text-muted);
  --bs-nav-link-hover-color: var(--text);
  --bs-nav-tabs-border-color: var(--border);
  --bs-nav-tabs-link-hover-border-color: var(--border);
  --bs-nav-tabs-link-active-color: var(--text);
  --bs-nav-tabs-link-active-bg: var(--surface);
  --bs-nav-tabs-link-active-border-color: var(--border);
  --bs-pagination-bg:        var(--surface);
  --bs-pagination-border-color: var(--border);
  --bs-pagination-color:     var(--text-muted);
  --bs-pagination-hover-bg:  var(--surface2);
  --bs-pagination-hover-color: var(--text);
  --bs-pagination-hover-border-color: var(--border);
  --bs-pagination-active-bg: var(--primary);
  --bs-pagination-active-border-color: var(--primary);
  --bs-pagination-disabled-bg: var(--surface2);
  --bs-pagination-disabled-color: var(--text-muted);
  --bs-pagination-disabled-border-color: var(--border);
  --bs-dropdown-bg:          var(--surface);
  --bs-dropdown-border-color: var(--border);
  --bs-dropdown-link-color:  var(--text);
  --bs-dropdown-link-hover-bg: var(--surface2);
  --bs-dropdown-link-hover-color: var(--text);
  --bs-dropdown-link-active-bg: var(--primary);
  --bs-dropdown-divider-bg:  var(--border);
  --bs-list-group-bg:        var(--surface);
  --bs-list-group-border-color: var(--border);
  --bs-list-group-color:     var(--text);
  --bs-list-group-hover-bg:  var(--surface2);
  --bs-list-group-action-hover-bg: var(--surface2);
  --bs-list-group-action-hover-color: var(--text);
  --bs-list-group-action-active-bg: var(--surface2);
  --bs-list-group-active-bg: var(--primary);
  --bs-list-group-active-border-color: var(--primary);
  --bs-tooltip-bg:           #30363d;
  --bs-tooltip-color:        var(--text);
  --bs-popover-bg:           var(--surface);
  --bs-popover-border-color: var(--border);
  --bs-popover-header-bg:    var(--surface2);
  --bs-popover-body-color:   var(--text);
  --bs-breadcrumb-divider-color: var(--text-muted);
  --bs-breadcrumb-item-active-color: var(--text-muted);
  --bs-progress-bg:          var(--surface2);
  --bs-accordion-bg:         var(--surface);
  --bs-accordion-border-color: var(--border);
  --bs-accordion-btn-bg:     var(--surface2);
  --bs-accordion-btn-color:  var(--text);
  --bs-accordion-active-bg:  rgba(204,0,0,0.08);
  --bs-accordion-active-color: var(--primary);
  --bs-accordion-body-padding-y: 1rem;
  --bs-offcanvas-bg:         var(--surface);
  --bs-offcanvas-border-color: var(--border);
  --bs-close-color:          var(--text);
  --bs-close-btn-filter:     invert(1) grayscale(100%) brightness(200%);
}

/* ---- 2. Body & base text ---- */
[data-theme="dark"] body { color: var(--text); background: var(--bg); }
[data-theme="dark"] h1,[data-theme="dark"] h2,[data-theme="dark"] h3,
[data-theme="dark"] h4,[data-theme="dark"] h5,[data-theme="dark"] h6 { color: var(--text); }
[data-theme="dark"] .text-dark        { color: var(--text)       !important; }
[data-theme="dark"] .text-muted       { color: var(--text-muted) !important; }
[data-theme="dark"] .text-secondary   { color: var(--text-muted) !important; }
[data-theme="dark"] .text-body        { color: var(--text)       !important; }
[data-theme="dark"] .text-body-secondary { color: var(--text-muted) !important; }
[data-theme="dark"] small, [data-theme="dark"] .small { color: inherit; }

/* ---- 3. Backgrounds & borders ---- */
[data-theme="dark"] .bg-light       { background-color: var(--surface2) !important; }
[data-theme="dark"] .bg-white       { background-color: var(--surface)  !important; }
[data-theme="dark"] .bg-body        { background-color: var(--bg)       !important; }
[data-theme="dark"] .bg-body-secondary { background-color: var(--surface2) !important; }
[data-theme="dark"] .border         { border-color: var(--border) !important; }
[data-theme="dark"] .border-bottom  { border-color: var(--border) !important; }
[data-theme="dark"] .border-top     { border-color: var(--border) !important; }

/* ---- 4. Forms — all input types ---- */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select,
[data-theme="dark"] textarea.form-control,
[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="email"],
[data-theme="dark"] input[type="password"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] input[type="search"],
[data-theme="dark"] input[type="tel"],
[data-theme="dark"] input[type="url"],
[data-theme="dark"] input[type="date"],
[data-theme="dark"] input[type="datetime-local"],
[data-theme="dark"] input[type="time"],
[data-theme="dark"] input[type="month"],
[data-theme="dark"] input[type="week"],
[data-theme="dark"] input[type="file"] {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] textarea.form-control:focus,
[data-theme="dark"] input[type="text"]:focus,
[data-theme="dark"] input[type="email"]:focus,
[data-theme="dark"] input[type="password"]:focus,
[data-theme="dark"] input[type="number"]:focus,
[data-theme="dark"] input[type="date"]:focus,
[data-theme="dark"] input[type="search"]:focus {
  background-color: var(--surface2);
  border-color: var(--primary);
  color: var(--text);
  box-shadow: 0 0 0 3px rgba(204,0,0,0.18);
}

/* Placeholder text */
[data-theme="dark"] .form-control::placeholder,
[data-theme="dark"] input::placeholder,
[data-theme="dark"] textarea::placeholder { color: var(--text-muted); opacity: 1; }

/* Disabled / read-only inputs */
[data-theme="dark"] .form-control:disabled,
[data-theme="dark"] .form-control[readonly],
[data-theme="dark"] .form-select:disabled,
[data-theme="dark"] input:disabled,
[data-theme="dark"] select:disabled,
[data-theme="dark"] textarea:disabled {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text-muted);
  opacity: 0.7;
}

/* Select option elements (browser-rendered) */
[data-theme="dark"] select option,
[data-theme="dark"] .form-select option {
  background-color: var(--surface2);
  color: var(--text);
}

/* File input button */
[data-theme="dark"] input[type="file"]::file-selector-button {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] input[type="file"]:hover::file-selector-button {
  background-color: var(--surface2);
}

/* Form label */
[data-theme="dark"] .form-label,
[data-theme="dark"] label { color: var(--text); }

/* Form text helper */
[data-theme="dark"] .form-text { color: var(--text-muted); }

/* Checkboxes & Radio buttons */
[data-theme="dark"] .form-check-input {
  background-color: var(--surface2);
  border-color: var(--border);
}
[data-theme="dark"] .form-check-input:checked {
  background-color: var(--primary);
  border-color: var(--primary);
}
[data-theme="dark"] .form-check-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(204,0,0,0.18);
}
[data-theme="dark"] .form-check-label { color: var(--text); }

/* Input groups */
[data-theme="dark"] .input-group-text {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text-muted);
}

/* Range slider */
[data-theme="dark"] .form-range::-webkit-slider-runnable-track { background: var(--surface2); }
[data-theme="dark"] .form-range::-webkit-slider-thumb { background: var(--primary); }

/* Floating labels */
[data-theme="dark"] .form-floating > label { color: var(--text-muted); }
[data-theme="dark"] .form-floating > .form-control:focus ~ label,
[data-theme="dark"] .form-floating > .form-control:not(:placeholder-shown) ~ label { color: var(--primary); }

/* ---- 5. Cards ---- */
[data-theme="dark"] .card {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .card-header {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .card-footer {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .card-body { color: var(--text); }
[data-theme="dark"] .card-title  { color: var(--text); }
[data-theme="dark"] .card-text   { color: var(--text); }
[data-theme="dark"] .card-subtitle { color: var(--text-muted); }

/* ---- 6. Alerts — all variants ---- */
[data-theme="dark"] .alert {
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .alert-primary   { background-color: rgba(13,110,253,0.15);  border-color: rgba(13,110,253,0.3);  color: #6ea8fe; }
[data-theme="dark"] .alert-secondary { background-color: rgba(108,117,125,0.15); border-color: rgba(108,117,125,0.3); color: #a7acb1; }
[data-theme="dark"] .alert-success   { background-color: rgba(25,135,84,0.15);   border-color: rgba(25,135,84,0.3);   color: #75b798; }
[data-theme="dark"] .alert-danger    { background-color: rgba(220,53,69,0.15);   border-color: rgba(220,53,69,0.3);   color: #ea868f; }
[data-theme="dark"] .alert-warning   { background-color: rgba(255,193,7,0.12);   border-color: rgba(255,193,7,0.3);   color: #ffda6a; }
[data-theme="dark"] .alert-info      { background-color: rgba(13,202,240,0.12);  border-color: rgba(13,202,240,0.3);  color: #6edff6; }
[data-theme="dark"] .alert-light     { background-color: var(--surface2);        border-color: var(--border);         color: var(--text); }
[data-theme="dark"] .alert-dark      { background-color: rgba(255,255,255,0.06); border-color: var(--border);         color: var(--text); }
[data-theme="dark"] .alert a         { color: inherit; font-weight: 600; }

/* ---- 7. Badges ---- */
[data-theme="dark"] .badge.bg-light    { background-color: var(--surface2) !important; color: var(--text) !important; }
[data-theme="dark"] .badge.bg-white    { background-color: var(--surface2) !important; color: var(--text) !important; }
[data-theme="dark"] .badge.text-dark   { color: #fff !important; }
[data-theme="dark"] .badge.bg-secondary { background-color: #444c56 !important; color: #e6edf3 !important; }

/* ---- 8. Buttons ---- */
[data-theme="dark"] .btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border);
}
[data-theme="dark"] .btn-outline-secondary:hover {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .btn-outline-primary {
  color: #6ea8fe;
  border-color: #6ea8fe;
}
[data-theme="dark"] .btn-outline-primary:hover {
  background-color: rgba(13,110,253,0.2);
  color: #fff;
}
[data-theme="dark"] .btn-outline-success {
  color: #75b798;
  border-color: #75b798;
}
[data-theme="dark"] .btn-outline-success:hover {
  background-color: rgba(25,135,84,0.2);
  color: #fff;
}
[data-theme="dark"] .btn-outline-warning {
  color: #ffda6a;
  border-color: #ffda6a;
}
[data-theme="dark"] .btn-outline-warning:hover {
  background-color: rgba(255,193,7,0.2);
  color: #000;
}
[data-theme="dark"] .btn-outline-info {
  color: #6edff6;
  border-color: #6edff6;
}
[data-theme="dark"] .btn-outline-info:hover {
  background-color: rgba(13,202,240,0.2);
  color: #000;
}
[data-theme="dark"] .btn-light {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .btn-light:hover {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .btn-dark {
  background-color: #30363d;
  border-color: #30363d;
  color: #fff;
}
[data-theme="dark"] .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

/* ---- 9. Tables ---- */
[data-theme="dark"] .table {
  --bs-table-bg: transparent;
  color: var(--text);
  border-color: var(--border);
}
[data-theme="dark"] .table > :not(caption) > * > * {
  background-color: var(--bs-table-bg);
  color: var(--text);
  border-color: var(--border);
}
[data-theme="dark"] .table-lms tbody tr:hover  { background: rgba(255,255,255,0.04); }
[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * { background-color: rgba(255,255,255,0.03); }
[data-theme="dark"] .table-bordered > :not(caption) > * { border-color: var(--border); }
[data-theme="dark"] .table-hover > tbody > tr:hover > * { background-color: rgba(255,255,255,0.05); color: var(--text); }
[data-theme="dark"] .table th { background-color: var(--surface2) !important; color: var(--text-muted); border-color: var(--border); }

/* ---- 10. Modal ---- */
[data-theme="dark"] .modal-content {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .modal-header {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .modal-body  { background-color: var(--surface); color: var(--text); }
[data-theme="dark"] .modal-footer {
  background-color: var(--surface2);
  border-color: var(--border);
}
[data-theme="dark"] .modal-title { color: var(--text); }
[data-theme="dark"] .modal-backdrop { background-color: #000; }

/* ---- 11. Dropdowns ---- */
[data-theme="dark"] .dropdown-menu {
  background-color: var(--surface);
  border-color: var(--border);
}
[data-theme="dark"] .dropdown-item {
  color: var(--text);
}
[data-theme="dark"] .dropdown-item:hover,
[data-theme="dark"] .dropdown-item:focus {
  background-color: var(--surface2);
  color: var(--text);
}
[data-theme="dark"] .dropdown-item.active,
[data-theme="dark"] .dropdown-item:active {
  background-color: var(--primary);
  color: #fff;
}
[data-theme="dark"] .dropdown-divider { border-color: var(--border); }
[data-theme="dark"] .dropdown-header  { color: var(--text-muted); }

/* ---- 12. Navs ---- */
[data-theme="dark"] .nav-tabs {
  border-color: var(--border);
}
[data-theme="dark"] .nav-tabs .nav-link {
  color: var(--text-muted);
  border-color: transparent;
}
[data-theme="dark"] .nav-tabs .nav-link:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--surface2);
}
[data-theme="dark"] .nav-tabs .nav-link.active {
  background-color: var(--surface);
  border-color: var(--border) var(--border) var(--surface);
  color: var(--primary);
}
[data-theme="dark"] .nav-pills .nav-link {
  color: var(--text-muted);
}
[data-theme="dark"] .nav-pills .nav-link:hover {
  color: var(--text);
  background-color: var(--surface2);
}
[data-theme="dark"] .nav-pills .nav-link.active {
  background-color: var(--primary);
  color: #fff;
}

/* ---- 13. Pagination ---- */
[data-theme="dark"] .page-item .page-link {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text-muted);
}
[data-theme="dark"] .page-item .page-link:hover {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .page-item.active .page-link {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
[data-theme="dark"] .page-item.disabled .page-link {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text-muted);
}

/* ---- 14. List Group ---- */
[data-theme="dark"] .list-group-item {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .list-group-item:hover,
[data-theme="dark"] .list-group-item-action:hover,
[data-theme="dark"] .list-group-item-action:focus {
  background-color: var(--surface2);
  color: var(--text);
}
[data-theme="dark"] .list-group-item.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
[data-theme="dark"] .list-group-item.disabled,
[data-theme="dark"] .list-group-item:disabled {
  color: var(--text-muted);
  background-color: var(--surface2);
}

/* ---- 15. Accordion ---- */
[data-theme="dark"] .accordion-item {
  background-color: var(--surface);
  border-color: var(--border);
}
[data-theme="dark"] .accordion-button {
  background-color: var(--surface2);
  color: var(--text);
}
[data-theme="dark"] .accordion-button:not(.collapsed) {
  background-color: rgba(204,0,0,0.1);
  color: var(--primary);
  box-shadow: inset 0 -1px 0 var(--border);
}
[data-theme="dark"] .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(204,0,0,0.18);
  border-color: var(--primary);
}
[data-theme="dark"] .accordion-button::after { filter: invert(1); }
[data-theme="dark"] .accordion-body {
  background-color: var(--surface);
  color: var(--text);
}

/* ---- 16. Breadcrumb ---- */
[data-theme="dark"] .breadcrumb-item { color: var(--text-muted); }
[data-theme="dark"] .breadcrumb-item a { color: var(--text-muted); }
[data-theme="dark"] .breadcrumb-item.active { color: var(--primary); }
[data-theme="dark"] .breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted); }

/* ---- 17. Progress ---- */
[data-theme="dark"] .progress { background-color: var(--surface2); }

/* ---- 18. Offcanvas / Sidebar panel ---- */
[data-theme="dark"] .offcanvas {
  background-color: var(--surface);
  color: var(--text);
}
[data-theme="dark"] .offcanvas-header { border-color: var(--border); }

/* ---- 19. Tooltip & Popover ---- */
[data-theme="dark"] .tooltip-inner {
  background-color: #30363d;
  color: var(--text);
}
[data-theme="dark"] .bs-tooltip-auto[data-popper-placement^=top] .tooltip-arrow::before,
[data-theme="dark"] .bs-tooltip-top .tooltip-arrow::before   { border-top-color: #30363d; }
[data-theme="dark"] .bs-tooltip-auto[data-popper-placement^=bottom] .tooltip-arrow::before,
[data-theme="dark"] .bs-tooltip-bottom .tooltip-arrow::before { border-bottom-color: #30363d; }
[data-theme="dark"] .bs-tooltip-auto[data-popper-placement^=start] .tooltip-arrow::before,
[data-theme="dark"] .bs-tooltip-start .tooltip-arrow::before  { border-left-color: #30363d; }
[data-theme="dark"] .bs-tooltip-auto[data-popper-placement^=end] .tooltip-arrow::before,
[data-theme="dark"] .bs-tooltip-end .tooltip-arrow::before    { border-right-color: #30363d; }
[data-theme="dark"] .popover {
  background-color: var(--surface);
  border-color: var(--border);
}
[data-theme="dark"] .popover-header {
  background-color: var(--surface2);
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .popover-body { color: var(--text); }
[data-theme="dark"] .popover-arrow::after { border-bottom-color: var(--surface); }

/* ---- 20. Spinner ---- */
[data-theme="dark"] .spinner-border,
[data-theme="dark"] .spinner-grow { color: var(--primary); }

/* ---- 21. Code & Pre ---- */
[data-theme="dark"] code {
  background-color: rgba(255,255,255,0.06);
  color: #ff7b72;
  border-radius: 4px;
  padding: 2px 6px;
}
[data-theme="dark"] pre {
  background-color: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ---- 22. Hr & Dividers ---- */
[data-theme="dark"] hr { border-color: var(--border); opacity: 1; }

/* ---- 23. Notification dropdown ---- */
[data-theme="dark"] .notif-dropdown { background: var(--surface); }
[data-theme="dark"] .dropdown-header { background: var(--surface2); color: var(--text); border-color: var(--border); }

/* ---- 24. Logo management upload zone (admin/settings) ---- */
[data-theme="dark"] .logo-preview-box { background: var(--surface2); border-color: var(--border); }
[data-theme="dark"] .logo-dropzone    { background: var(--surface2); border-color: var(--border); }
[data-theme="dark"] .logo-dropzone:hover,
[data-theme="dark"] .logo-dropzone.dragover { background: rgba(204,0,0,0.08); border-color: var(--primary); }

/* ---- 25. Quiz option blocks ---- */
[data-theme="dark"] .quiz-option {
  border-color: var(--border) !important;
  background: var(--surface2);
  color: var(--text);
}
[data-theme="dark"] .quiz-option:hover  { border-color: var(--primary) !important; background: rgba(204,0,0,0.08); }
[data-theme="dark"] .quiz-option.selected { border-color: var(--primary) !important; background: rgba(204,0,0,0.12); }
[data-theme="dark"] .question-block  { background: var(--surface); border-color: var(--border) !important; }

/* ---- 26. Inline utils & misc ---- */
[data-theme="dark"] .fw-bold   { color: inherit; }
[data-theme="dark"] .fw-semibold { color: inherit; }
[data-theme="dark"] strong     { color: inherit; }
[data-theme="dark"] b          { color: inherit; }
[data-theme="dark"] .shadow    { box-shadow: var(--shadow) !important; }
[data-theme="dark"] .shadow-sm { box-shadow: var(--shadow) !important; }
[data-theme="dark"] .rounded   { border-color: var(--border); }


/* ---- Login Logo Wrapper (white bg for dark panel) ---- */
.login-logo-wrapper {
    background: #fff;
    border-radius: 16px;
    padding: 16px 24px;
    margin-bottom: 28px;
    display: inline-block;
    box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}
.login-logo-large {
    height: auto !important;
    width: 260px !important;
    max-width: 100% !important;
    margin-bottom: 0 !important;
    filter: none !important;
    display: block;
}