/* ============================================
   CAMPUS INVEN - CLEAN MODERN DESIGN
   ============================================ */

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

:root {
  /* Light Mode - Primary Colors */
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #6d28d9;
  --secondary: #06b6d4;
  --accent: #ec4899;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  /* Light Mode - Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --spacing-unit: 8px;
}

/* Dark Mode Variables */
body.dark-mode {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #94a3b8;
  --border-color: #475569;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

html, body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 14px;
  transition: background-color var(--transition), color var(--transition);
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 280px;
  height: 100vh;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: background-color var(--transition), border-color var(--transition);
  box-shadow: var(--shadow-md);
}

body.dark-mode .sidebar {
  background: var(--bg-secondary);
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  font-size: 32px;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  flex-shrink: 0;
}

.sidebar-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.sidebar-header p {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 4px 0 0 0;
}

/* Sidebar Menu */
.sidebar-menu {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
}

.sidebar-menu::-webkit-scrollbar {
  width: 6px;
}

.sidebar-menu::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-menu::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 4px;
  transition: all var(--transition);
  position: relative;
}

.menu-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.menu-item.active {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  color: white;
  font-weight: 600;
}

.menu-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.menu-label {
  flex: 1;
  font-size: 13px;
}

.menu-indicator {
  width: 4px;
  height: 20px;
  background: white;
  border-radius: 2px;
  opacity: 0;
}

.menu-item.active .menu-indicator {
  opacity: 1;
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border-color);
}

.theme-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.theme-icon {
  font-size: 16px;
}

.theme-label {
  flex: 1;
}

/* ============================================
   MAIN LAYOUT
   ============================================ */

.main-layout {
  margin-left: 280px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top Header */
.top-header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-xs);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 30px;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.time-display {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-avatar {
  font-size: 20px;
}

.user-name {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ============================================
   PAGE CONTENT
   ============================================ */

.page-content {
  flex: 1;
  padding: 30px;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

/* ============================================
   CARDS & CONTAINERS
   ============================================ */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition);
}

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

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}

.btn-primary:hover {
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background: #0891b2;
  transform: translateY(-2px);
}

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

.btn-success:hover {
  background: #059669;
  transform: translateY(-2px);
}

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

.btn-danger:hover {
  background: #dc2626;
  transform: translateY(-2px);
}

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

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

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 14px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================
   GRID & LAYOUT
   ============================================ */

.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

/* Statistics Cards */
.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 8px 0;
}

.stat-change {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ============================================
   MODALS
   ============================================ */

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--transition);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border-radius: 16px;
  padding: 30px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ============================================
   TABLES
   ============================================ */

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: var(--bg-tertiary);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

tbody tr {
  transition: background-color var(--transition);
}

tbody tr:hover {
  background-color: var(--bg-tertiary);
}

/* ============================================
   BADGES & LABELS
   ============================================ */

.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: rgba(124, 58, 237, 0.1);
  color: var(--primary);
}

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

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

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

.badge-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--info);
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  border-left: 4px solid;
  margin-bottom: 16px;
  font-size: 13px;
}

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

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

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

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--info);
  color: var(--info);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
  display: flex;
  gap: 6px;
  margin-top: 20px;
  justify-content: center;
}

.pagination button {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all var(--transition);
}

.pagination button:hover,
.pagination button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ============================================
   FOOTER
   ============================================ */

.page-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 20px 30px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 12px;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-version {
  font-weight: 600;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.loading {
  animation: spin 1s linear infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
  .page-content {
    padding: 20px;
  }

  .dashboard-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 240px;
  }

  .main-layout {
    margin-left: 240px;
  }

  .top-header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }

  .header-left h1 {
    font-size: 24px;
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
    gap: 16px;
  }

  .page-content {
    padding: 16px;
  }

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

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
    padding: 20px;
  }
}

@media (max-width: 640px) {
  .sidebar {
    width: 70px;
  }

  .sidebar-header {
    padding: 16px 8px;
  }

  .logo-container {
    flex-direction: column;
    gap: 8px;
  }

  .logo {
    width: 40px;
    height: 40px;
    font-size: 24px;
  }

  .sidebar-header h2,
  .sidebar-header p {
    display: none;
  }

  .menu-label,
  .theme-label {
    display: none;
  }

  .menu-item {
    padding: 12px 8px;
    justify-content: center;
  }

  .main-layout {
    margin-left: 70px;
  }

  .top-header {
    padding: 16px;
  }

  .header-left h1 {
    font-size: 20px;
  }

  .page-content {
    padding: 12px;
  }

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

  .card {
    padding: 16px;
  }

  .modal-content {
    width: 98%;
    padding: 16px;
  }

  table {
    font-size: 11px;
  }

  th,
  td {
    padding: 8px;
  }
}