/* ============================================
   GLOBAL STYLES & RESET
   ============================================ */

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

:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --success-color: #1cc88a;
  --danger-color: #e74a3b;
  --warning-color: #f6c23e;
  --info-color: #36b9cc;
  --light-color: #f8f9fa;
  --dark-color: #2e3338;
  --border-radius: 10px;
  --transition: all 0.3s ease;
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  font-family: 'Poppins', 'Cairo', sans-serif;
  background-color: #f8f9fa;
  color: #333;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: #2e3338;
  margin-bottom: 15px;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 15px;
  color: #555;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
  text-decoration: underline;
}

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

.btn {
  border-radius: var(--border-radius);
  padding: 10px 20px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
  color: white;
}

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

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

.btn-warning {
  background-color: var(--warning-color);
  color: #333;
}

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

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

.btn-lg {
  padding: 12px 30px;
  font-size: 18px;
}

/* ============================================
   CARDS
   ============================================ */

.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  transform: translateY(-5px);
}

.card-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  border: none;
  padding: 20px;
  font-weight: 600;
}

.card-body {
  padding: 25px;
}

.card-footer {
  background-color: #f8f9fa;
  border-top: 1px solid #e3e6f0;
  padding: 15px 25px;
}

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

.form-control, .form-select {
  border: 2px solid #e0e0e0;
  border-radius: var(--border-radius);
  padding: 10px 15px;
  font-size: 14px;
  transition: var(--transition);
  background-color: #f8f9fa;
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  background-color: white;
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-label {
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 20px;
}

.input-group-text {
  background-color: #f8f9fa;
  border: 2px solid #e0e0e0;
  color: var(--primary-color);
}

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

.alert {
  border: none;
  border-radius: var(--border-radius);
  padding: 15px 20px;
  margin-bottom: 20px;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-success {
  background-color: #d4edda;
  color: #155724;
  border-left: 4px solid var(--success-color);
}

.alert-danger {
  background-color: #f8d7da;
  color: #721c24;
  border-left: 4px solid var(--danger-color);
}

.alert-warning {
  background-color: #fff3cd;
  color: #856404;
  border-left: 4px solid var(--warning-color);
}

.alert-info {
  background-color: #d1ecf1;
  color: #0c5460;
  border-left: 4px solid var(--info-color);
}

/* ============================================
   NAVBAR & HEADER
   ============================================ */

.navbar {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  padding: 15px 20px;
}

.navbar-brand {
  font-weight: 700;
  font-size: 20px;
  color: white !important;
}

.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  margin: 0 10px;
  transition: var(--transition);
  font-weight: 500;
}

.navbar-nav .nav-link:hover {
  color: white !important;
  transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
  color: white !important;
  border-bottom: 3px solid white;
}

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

.table {
  border-collapse: collapse;
  margin-bottom: 20px;
}

.table thead {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
}

.table thead th {
  border: none;
  padding: 15px;
  font-weight: 600;
  text-align: left;
}

.table tbody td {
  padding: 12px 15px;
  border-bottom: 1px solid #e3e6f0;
  vertical-align: middle;
}

.table tbody tr:hover {
  background-color: #f8f9fa;
  transition: var(--transition);
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: #f8f9fa;
}

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

.modal-content {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  border: none;
  padding: 20px;
}

.modal-header .btn-close {
  filter: brightness(0) invert(1);
}

.modal-body {
  padding: 25px;
}

.modal-footer {
  border-top: 1px solid #e3e6f0;
  padding: 15px 20px;
}

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

.badge {
  padding: 6px 12px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 12px;
}

.badge-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
}

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

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

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

.pagination {
  margin-top: 30px;
}

.page-link {
  color: var(--primary-color);
  border: 1px solid #e3e6f0;
  border-radius: var(--border-radius);
  margin: 0 5px;
  transition: var(--transition);
}

.page-link:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.page-item.active .page-link {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  border-color: var(--primary-color);
}

/* ============================================
   UTILITIES
   ============================================ */

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary { background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-info { background-color: var(--info-color) !important; }

.shadow-sm { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important; }
.shadow { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important; }
.shadow-lg { box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15) !important; }

.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: 15px !important; }
.rounded-full { border-radius: 50% !important; }

/* ============================================
   RESPONSIVE DESIGN - TABLETS
   ============================================ */

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.1rem; }
  
  .card {
    margin-bottom: 15px;
  }
  
  .card-body {
    padding: 15px;
  }
  
  .table {
    font-size: 13px;
  }
  
  .table thead th,
  .table tbody td {
    padding: 10px;
  }
  
  .btn {
    padding: 8px 15px;
    font-size: 14px;
  }
  
  .navbar {
    padding: 10px 15px;
  }
  
  .navbar-brand {
    font-size: 18px;
  }
  
  .navbar-nav .nav-link {
    margin: 5px 0;
  }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE
   ============================================ */

@media (max-width: 576px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.1rem; }
  h4 { font-size: 1rem; }
  h5 { font-size: 0.95rem; }
  h6 { font-size: 0.9rem; }
  
  body {
    font-size: 14px;
  }
  
  .container {
    padding: 10px;
  }
  
  .card {
    margin-bottom: 10px;
    border-radius: 8px;
  }
  
  .card-header {
    padding: 15px;
  }
  
  .card-body {
    padding: 12px;
  }
  
  .form-control, .form-select {
    font-size: 16px; /* Prevents zoom on iOS */
    padding: 10px 12px;
  }
  
  .form-label {
    font-size: 13px;
    margin-bottom: 6px;
  }
  
  .btn {
    padding: 10px 15px;
    font-size: 14px;
    width: 100%;
    margin-bottom: 8px;
  }
  
  .btn-sm {
    padding: 6px 10px;
    font-size: 12px;
    width: auto;
  }
  
  .table {
    font-size: 12px;
    margin-bottom: 15px;
  }
  
  .table thead th,
  .table tbody td {
    padding: 8px;
  }
  
  .navbar {
    padding: 8px 10px;
  }
  
  .navbar-brand {
    font-size: 16px;
  }
  
  .navbar-nav {
    margin-top: 10px;
  }
  
  .navbar-nav .nav-link {
    padding: 8px 0 !important;
    margin: 5px 0;
  }
  
  .row {
    margin-right: -5px;
    margin-left: -5px;
  }
  
  .col, [class*="col-"] {
    padding-right: 5px;
    padding-left: 5px;
  }
  
  .modal-body {
    padding: 15px;
  }
  
  .alert {
    padding: 12px 15px;
    font-size: 13px;
  }
  
  .badge {
    padding: 4px 8px;
    font-size: 11px;
  }
}

/* ============================================
   RESPONSIVE DESIGN - EXTRA SMALL
   ============================================ */

@media (max-width: 380px) {
  h1 { font-size: 1.25rem; }
  h2 { font-size: 1.1rem; }
  h3 { font-size: 1rem; }
  
  body {
    font-size: 13px;
  }
  
  .card-header {
    padding: 12px;
  }
  
  .card-body {
    padding: 10px;
  }
  
  .form-control, .form-select {
    font-size: 14px;
    padding: 8px 10px;
  }
  
  .btn {
    padding: 8px 12px;
    font-size: 13px;
  }
  
  .table {
    font-size: 11px;
  }
  
  .table thead th,
  .table tbody td {
    padding: 6px;
  }
  
  .navbar-brand {
    font-size: 14px;
  }
}

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

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

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

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

.slide-up {
  animation: slideUp 0.5s ease-out;
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-color);
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  body {
    background-color: white;
  }
  
  .navbar, .btn, .no-print {
    display: none !important;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}