/* CHNTC SMS - Futuristic Design Theme */
/* Colors from CHNTC Website: Deep Teal #0a5c5c, Green #00b894, Dark #0c1e2c, Gold #f0a500 */

:root {
  --primary: #0a5c5c;
  --primary-light: #0d7a7a;
  --primary-dark: #064040;
  --secondary: #00b894;
  --secondary-light: #00d9a7;
  --accent: #f0a500;
  --accent-light: #ffc042;
  --dark: #0c1e2c;
  --dark-light: #142d3f;
  --dark-lighter: #1a3a52;
  --success: #00b894;
  --info: #0984e3;
  --warning: #f0a500;
  --danger: #d63031;
  --light: #f8f9fa;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --gradient-primary: linear-gradient(135deg, #0a5c5c 0%, #0d7a7a 50%, #00b894 100%);
  --gradient-dark: linear-gradient(135deg, #0c1e2c 0%, #142d3f 100%);
  --gradient-accent: linear-gradient(135deg, #f0a500 0%, #ffc042 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
  --shadow-glow: 0 0 20px rgba(0,184,148,0.3);
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --sidebar-width: 280px;
  --topbar-height: 70px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background: #f0f2f5;
  color: var(--gray-800);
  overflow-x: hidden;
  min-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--gray-200); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* ============ LOGIN PAGE ============ */
.login-page {
  min-height: 100vh;
  background: var(--gradient-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.login-page::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(10,92,92,0.3) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(0,184,148,0.2) 0%, transparent 50%),
              radial-gradient(circle at 50% 20%, rgba(240,165,0,0.1) 0%, transparent 40%);
  animation: bgPulse 15s ease-in-out infinite;
}
@keyframes bgPulse {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.1) rotate(2deg); }
}
.login-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 480px;
  padding: 20px;
}
.login-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--border-radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.1);
}
.login-logo {
  text-align: center;
  margin-bottom: 32px;
}
.login-logo img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--secondary);
  box-shadow: var(--shadow-glow);
  margin-bottom: 16px;
}
.login-logo h2 {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.login-logo p {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
}
.login-form .form-group {
  margin-bottom: 20px;
}
.login-form .form-label {
  color: rgba(255,255,255,0.8);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
}
.login-form .form-control {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--border-radius-sm);
  color: #fff;
  padding: 12px 16px;
  font-size: 0.95rem;
  transition: var(--transition);
  height: auto;
}
.login-form .form-control:focus {
  background: rgba(255,255,255,0.12);
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(0,184,148,0.2);
  color: #fff;
}
.login-form .form-control::placeholder { color: rgba(255,255,255,0.4); }
.login-form .input-icon {
  position: relative;
}
.login-form .input-icon i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.4);
}
.login-form .input-icon .form-control {
  padding-left: 42px;
}
.login-form .btn-login {
  width: 100%;
  padding: 12px;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--border-radius-sm);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.5px;
}
.login-form .btn-login:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.login-form .form-check-label { color: rgba(255,255,255,0.7); }
.login-form .form-check-input:checked {
  background-color: var(--secondary);
  border-color: var(--secondary);
}
.login-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 1;
}
.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--secondary);
  border-radius: 50%;
  opacity: 0.3;
  animation: float 10s infinite ease-in-out;
}
@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
  25% { transform: translateY(-100px) translateX(50px); opacity: 0.6; }
  50% { transform: translateY(-200px) translateX(-30px); opacity: 0.3; }
  75% { transform: translateY(-100px) translateX(80px); opacity: 0.5; }
}

/* ============ SIDEBAR ============ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--gradient-dark);
  border-right: 1px solid rgba(255,255,255,0.08);
  z-index: 1050;
  transition: var(--transition);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar-header {
  padding: 20px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid var(--secondary);
  margin-bottom: 10px;
  box-shadow: var(--shadow-glow);
}
.sidebar-header h5 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
}
.sidebar-header small {
  color: rgba(255,255,255,0.5);
  font-size: 0.75rem;
}
.sidebar-menu {
  padding: 16px 0;
}
.sidebar-menu .menu-header {
  padding: 8px 20px;
  color: rgba(255,255,255,0.35);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 12px;
}
.sidebar-menu .menu-item {
  display: flex;
  align-items: center;
  padding: 10px 20px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  border-left: 3px solid transparent;
  cursor: pointer;
}
.sidebar-menu .menu-item:hover {
  background: rgba(255,255,255,0.05);
  color: #fff;
  border-left-color: var(--secondary);
}
.sidebar-menu .menu-item.active {
  background: rgba(0,184,148,0.1);
  color: var(--secondary);
  border-left-color: var(--secondary);
}
.sidebar-menu .menu-item i {
  width: 20px;
  margin-right: 12px;
  font-size: 1rem;
  text-align: center;
}
.sidebar-menu .menu-item .badge {
  margin-left: auto;
  font-size: 0.65rem;
  padding: 3px 8px;
  border-radius: 10px;
  background: var(--danger);
  color: #fff;
}
.sidebar-menu .submenu {
  display: none;
  list-style: none;
  padding: 0;
}
.sidebar-menu .submenu.show { display: block; }
.sidebar-menu .submenu .menu-item {
  padding-left: 52px;
  font-size: 0.82rem;
  font-weight: 400;
}
.sidebar-menu .menu-item .arrow {
  margin-left: auto;
  transition: var(--transition);
  font-size: 0.7rem;
}
.sidebar-menu .menu-item.open .arrow { transform: rotate(90deg); }

/* ============ TOPBAR ============ */
.topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--topbar-height);
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 1040;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.topbar-left .sidebar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--gray-700);
  cursor: pointer;
}
.topbar-search {
  position: relative;
  width: 320px;
}
.topbar-search input {
  width: 100%;
  padding: 8px 16px 8px 40px;
  border: 1px solid var(--gray-300);
  border-radius: 20px;
  font-size: 0.875rem;
  background: var(--gray-100);
  transition: var(--transition);
}
.topbar-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,92,92,0.1);
}
.topbar-search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-500);
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.topbar-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topbar-btn:hover { background: var(--gray-200); color: var(--primary); }
.topbar-btn .notif-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  background: var(--danger);
  border-radius: 50%;
  border: 2px solid #fff;
}
.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 4px 12px 4px 4px;
  border-radius: 30px;
  transition: var(--transition);
}
.topbar-user:hover { background: var(--gray-100); }
.topbar-user img, .topbar-user .user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.85rem;
}
.topbar-user-info { text-align: left; }
.topbar-user-info .name { font-size: 0.85rem; font-weight: 600; color: var(--gray-800); }
.topbar-user-info .role { font-size: 0.7rem; color: var(--gray-500); }

/* ============ MAIN CONTENT ============ */
.main-content {
  margin-left: var(--sidebar-width);
  margin-top: var(--topbar-height);
  padding: 24px;
  min-height: calc(100vh - var(--topbar-height));
  transition: var(--transition);
}

/* ============ DASHBOARD CARDS ============ */
.stat-card {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.stat-card .stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-card .stat-change {
  font-size: 0.75rem;
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 12px;
}
.stat-change.positive { background: rgba(0,184,148,0.1); color: var(--success); }
.stat-change.negative { background: rgba(214,48,49,0.1); color: var(--danger); }
.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  border-radius: 0 0 0 100%;
  opacity: 0.05;
}
.stat-card.teal .stat-icon { background: rgba(10,92,92,0.1); color: var(--primary); }
.stat-card.teal::after { background: var(--primary); }
.stat-card.green .stat-icon { background: rgba(0,184,148,0.1); color: var(--secondary); }
.stat-card.green::after { background: var(--secondary); }
.stat-card.gold .stat-icon { background: rgba(240,165,0,0.1); color: var(--accent); }
.stat-card.gold::after { background: var(--accent); }
.stat-card.blue .stat-icon { background: rgba(9,132,227,0.1); color: var(--info); }
.stat-card.blue::after { background: var(--info); }
.stat-card.red .stat-icon { background: rgba(214,48,49,0.1); color: var(--danger); }
.stat-card.red::after { background: var(--danger); }

/* ============ CARDS ============ */
.card {
  background: #fff;
  border-radius: var(--border-radius);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
}
.card-header h5, .card-header h6 {
  font-weight: 700;
  color: var(--dark);
  margin: 0;
  font-size: 1rem;
}
.card-body { padding: 24px; }
.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-100);
}

/* ============ TABLES ============ */
.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table thead th {
  background: var(--gray-100);
  padding: 12px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--gray-300);
  white-space: nowrap;
}
.data-table tbody td {
  padding: 12px 16px;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--gray-200);
  vertical-align: middle;
}
.data-table tbody tr:hover { background: rgba(10,92,92,0.02); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ============ BADGES ============ */
.badge-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.badge-active { background: rgba(0,184,148,0.1); color: var(--success); }
.badge-inactive { background: rgba(108,117,125,0.1); color: var(--gray-600); }
.badge-pending { background: rgba(240,165,0,0.1); color: var(--warning); }
.badge-approved { background: rgba(0,184,148,0.1); color: var(--success); }
.badge-rejected { background: rgba(214,48,49,0.1); color: var(--danger); }
.badge-unpaid { background: rgba(214,48,49,0.1); color: var(--danger); }
.badge-paid { background: rgba(0,184,148,0.1); color: var(--success); }
.badge-partial { background: rgba(240,165,0,0.1); color: var(--warning); }

/* ============ BUTTONS ============ */
.btn {
  border-radius: var(--border-radius-sm);
  padding: 8px 20px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-primary { background: var(--gradient-primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--gray-200); color: var(--gray-700); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--accent); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline-primary { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 0.78rem; }
.btn-lg { padding: 12px 28px; font-size: 1rem; }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: 50%; }

/* ============ FORMS ============ */
.form-control, .form-select {
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--gray-300);
  padding: 10px 14px;
  font-size: 0.875rem;
  transition: var(--transition);
}
.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,92,92,0.1);
}
.form-label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.input-group-text {
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
  color: var(--gray-600);
}

/* ============ PAGE HEADER ============ */
.page-header {
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.page-header h4 {
  font-weight: 800;
  color: var(--dark);
  font-size: 1.5rem;
  margin: 0;
}
.page-header .breadcrumb {
  margin: 4px 0 0;
  font-size: 0.8rem;
}
.breadcrumb-item a { color: var(--primary); text-decoration: none; }
.breadcrumb-item.active { color: var(--gray-500); }

/* ============ MODALS ============ */
.modal-content {
  border-radius: var(--border-radius);
  border: none;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  border-bottom: 1px solid var(--gray-200);
  padding: 20px 24px;
}
.modal-header .modal-title { font-weight: 700; font-size: 1.1rem; }
.modal-body { padding: 24px; }
.modal-footer { border-top: 1px solid var(--gray-200); padding: 16px 24px; }

/* ============ ALERTS ============ */
.alert {
  border-radius: var(--border-radius-sm);
  border: none;
  padding: 14px 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* ============ TIMELINE ============ */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-300);
}
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--secondary);
  background: #fff;
}
.timeline-item .timeline-time { font-size: 0.75rem; color: var(--gray-500); }
.timeline-item .timeline-content { font-size: 0.875rem; color: var(--gray-700); }

/* ============ DRAG & DROP TIMETABLE ============ */
.timetable-grid {
  display: grid;
  grid-template-columns: 80px repeat(6, 1fr);
  gap: 2px;
  background: var(--gray-200);
  border-radius: var(--border-radius);
  overflow: hidden;
}
.timetable-header {
  background: var(--primary);
  color: #fff;
  padding: 10px;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
}
.timetable-time {
  background: var(--gray-100);
  padding: 10px;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gray-700);
}
.timetable-cell {
  background: #fff;
  min-height: 60px;
  padding: 4px;
  transition: var(--transition);
}
.timetable-cell.drag-over { background: rgba(0,184,148,0.1); border: 2px dashed var(--secondary); }
.timetable-lesson {
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.72rem;
  margin: 2px;
  cursor: grab;
  transition: var(--transition);
}
.timetable-lesson:hover { transform: scale(1.02); box-shadow: var(--shadow-sm); }
.timetable-lesson.clash { background: var(--danger); }

/* ============ RESPONSIVE ============ */
@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.show { transform: translateX(0); }
  .topbar { left: 0; }
  .topbar-left .sidebar-toggle { display: block; }
  .main-content { margin-left: 0; }
  .topbar-search { width: 200px; }
}
@media (max-width: 576px) {
  .main-content { padding: 16px; }
  .topbar-search { display: none; }
  .stat-card .stat-value { font-size: 1.5rem; }
  .page-header { flex-direction: column; align-items: flex-start; }
}

/* ============ ANIMATIONS ============ */
.fade-in { animation: fadeIn 0.3s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.slide-in { animation: slideIn 0.3s ease-in-out; }
@keyframes slideIn { from { opacity: 0; transform: translateX(-20px); } to { opacity: 1; transform: translateX(0); } }

/* ============ PRINT STYLES ============ */
@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main-content { margin: 0 !important; padding: 0 !important; }
  .card { box-shadow: none !important; border: 1px solid #ddd !important; }
  .stat-card { break-inside: avoid; }
}

/* ============ MISC ============ */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--gray-200);
}
.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 64px; height: 64px; }
.divider { border-top: 1px solid var(--gray-200); margin: 16px 0; }
.text-primary { color: var(--primary) !important; }
.text-secondary-c { color: var(--secondary) !important; }
.text-accent { color: var(--accent) !important; }
.bg-gradient-primary { background: var(--gradient-primary) !important; }
.bg-gradient-dark { background: var(--gradient-dark) !important; }
.rounded { border-radius: var(--border-radius) !important; }
.glass-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--border-radius);
}
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-500);
}
.empty-state i { font-size: 3rem; margin-bottom: 16px; color: var(--gray-400); }
.empty-state h5 { color: var(--gray-600); font-weight: 600; margin-bottom: 8px; }
.empty-state p { font-size: 0.875rem; }

/* Dropdown */
.dropdown-menu {
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: 8px;
}
.dropdown-item {
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.85rem;
  transition: var(--transition);
}
.dropdown-item:hover { background: var(--gray-100); }

/* Progress bars */
.progress { border-radius: 10px; height: 8px; background: var(--gray-200); }
.progress-bar { border-radius: 10px; }

/* Nav tabs */
.nav-tabs .nav-link {
  border: none;
  padding: 10px 20px;
  font-weight: 600;
  color: var(--gray-500);
  font-size: 0.85rem;
}
.nav-tabs .nav-link.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
  background: transparent;
}

/* Chart container */
.chart-container { position: relative; width: 100%; height: 300px; }