:root {
  --bg-body: #0f172a;
  --bg-card: #1e293b;
  --bg-muted: #020617;
  --bg-table: #1e293b;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --success-hover: #059669;
  --warning: #f59e0b;
  --info: #06b6d4;
  --danger: #ef4444;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

/* Light theme overrides */
[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-muted: #f1f5f9;
  --bg-table: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --success-hover: #059669;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --toggler-btn: #1e293b;
}

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

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1rem;
}

h1 {
  font-size: 2rem;
  letter-spacing: -0.025em;
}

h2 {
  font-size: 1.5rem;
}

p {
  line-height: 1.7;
  margin-bottom: 1rem;
}

.text-muted {
  color: var(--text-muted) !important;
}

.container {
  flex: 1;
  max-width: 100%;
  padding-left: 15px;
  padding-right: 15px;
}

/* NAVBAR */
.navbar {
  background-color: var(--bg-card) !important;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
}

.navbar-brand {
  color: var(--text-main) !important;
  font-weight: 600;
  font-size: 1.25rem;
  transition: opacity 0.2s;
}

.navbar-toggler {
  background-color: var(--toggler-btn) !important;
  padding: 0.5rem 1rem !important;
  transition: background-color 0.2s, color 0.2s;
}

.navbar-brand:hover {
  opacity: 0.8;
}

.nav-link {
  color: var(--text-main) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: 6px;
  transition: background-color 0.2s, color 0.2s;
}

.nav-link:hover {
  background-color: var(--bg-muted);
}

/* CARDS */
.card {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  color: var(--text-muted);
}

/* Dashboard stat cards */
.card.bg-info,
.card.bg-primary,
.card.bg-success,
.card.bg-warning {
  border: none;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
}

.card.bg-success {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-hover) 100%);
}

.card.bg-warning {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.card.bg-info {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.card.text-white .card-title {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.813rem;
}

.display-4 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
}

/* TABLES */
.table-responsive {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.table-responsive::-webkit-scrollbar {
  height: 8px;
}

.table-responsive::-webkit-scrollbar-track {
  background: var(--bg-muted);
  border-radius: 4px;
}

.table-responsive::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.table-responsive::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.table {
  background-color: var(--bg-table);
  color: var(--text-main);
  margin-bottom: 0;
  border-collapse: separate;
  border-spacing: 0;
}

.table thead {
  background-color: var(--bg-muted);
  position: sticky;
  top: 0;
  z-index: 10;
}

.table thead th {
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1rem;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-muted);
  white-space: nowrap;
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.938rem;
}

.table tbody tr {
  transition: background-color 0.15s ease;
}

.table tbody tr:hover {
  background-color: var(--bg-muted) !important;
}

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

.table th,
.table td {
  border-color: var(--border-color);
}

.table,
.table > :not(caption) > * > * {
  background-color: var(--bg-table) !important;
  color: var(--text-main) !important;
}

.table td form {
  display: inline-block;
  margin: 0;
}

/* FORMS */
.form-control,
.form-select {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.625rem 0.875rem;
  font-size: 0.938rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  background-color: var(--bg-card);
  color: var(--text-main);
}

.form-label {
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-main);
}

/* BUTTONS */
.btn {
  border-radius: 8px;
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  transition: all 0.2s ease;
  border: none;
  font-size: 0.938rem;
  cursor: pointer;
}

.btn:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background-color: var(--success);
  border-color: var(--success);
  color: white;
}

.btn-success:hover {
  background-color: var(--success-hover);
  border-color: var(--success-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger {
  background-color: var(--danger);
  border-color: var(--danger);
  color: white;
}

.btn-danger:hover {
  background-color: #dc2626;
  border-color: #dc2626;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline-primary {
  color: var(--primary);
  border: 1px solid var(--primary);
  background-color: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-1px);
}

.btn-outline-secondary {
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  background-color: transparent;
}

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

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.813rem;
}

/* ALERTS */
.alert {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.alert-info {
  background-color: rgba(6, 182, 212, 0.1);
  border-color: var(--info);
  color: var(--info);
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

/* FOOTER */
footer {
  margin-top: auto;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 1.5rem 0;
}

footer p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* THEME TOGGLE */
#theme_button {
  margin-left: 0;
  background: none;
  border: none;
  cursor: pointer;
}

#theme_button button {
  width: 40px;
  height: 40px;
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

#theme_button button:hover {
  background: var(--bg-body);
  transform: scale(1.05);
}

.theme-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.theme-icon::before {
  content: "☀️";
}

[data-theme="light"] .theme-icon::before {
  content: "🌙";
}

/* PAGINATION */
.d-flex.justify-content-between {
  align-items: center;
  padding: 1rem 0;
}

.d-flex.justify-content-between span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* UTILITY CLASSES */
.mb-3 {
  margin-bottom: 1rem !important;
}

.mb-4 {
  margin-bottom: 1.5rem !important;
}

.mt-3 {
  margin-top: 1rem !important;
}

.mt-4 {
  margin-top: 1.5rem !important;
}

.w-100 {
  width: 100% !important;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  h1 {
    font-size: 1.75rem;
  }

  .display-4 {
    font-size: 2rem;
  }

  .card-body {
    padding: 1.25rem;
  }

  .navbar-brand {
    font-size: 1.125rem;
  }

  .table thead th,
  .table tbody td {
    padding: 0.75rem 0.5rem;
    font-size: 0.875rem;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }

  /* Stack action buttons vertically on mobile */
  .table tbody td form {
    margin-top: 0.5rem;
  }

  /* Improve mobile table scrolling */
  .table-responsive {
    -webkit-overflow-scrolling: touch;
  }

  /* Better spacing for mobile cards */
  .col-md-3,
  .col-md-6 {
    margin-bottom: 1rem;
  }
}

@media (max-width: 576px) {
  .navbar {
    padding: 0.75rem 0;
  }

  .navbar-brand {
    font-size: 1rem;
  }

  .display-4 {
    font-size: 1.75rem;
  }

  .card.text-white .card-title {
    font-size: 0.75rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .table thead th {
    font-size: 0.75rem;
    padding: 0.625rem 0.375rem;
  }

  .table tbody td {
    font-size: 0.813rem;
    padding: 0.625rem 0.375rem;
  }
}

/* Loading states and animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card,
.table-responsive {
  animation: fadeIn 0.3s ease-out;
}

/* Print styles */
@media print {
  .navbar,
  .btn,
  footer,
  #theme_button {
    display: none;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  body {
    background-color: white;
    color: black;
  }
}