:root {
  /* Primary Colors */
  --primary-dark: #0D3319;
  --primary-light: #12801B;
  --primary-hover: rgba(18, 128, 27, 0.8);
  --primary-muted: rgba(13, 51, 25, 0.1);
  
  /* Semantic Colors */
  --success: #198754;
  --info: #0dcaf0;
  --warning: #ffc107;
  --danger: #dc3545;
  --secondary: #6c757d;
  --light: #f8f9fa;
  --dark: #212529;
  
  /* Text Colors */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-muted: #6c757d;
  --text-white: #ffffff;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-dark: var(--primary-dark);
  --bg-light: var(--primary-light);
  
  /* Border Colors */
  --border-primary: #dee2e6;
  --border-secondary: #e9ecef;
  --border-success: var(--success);
  --border-danger: var(--danger);
  
  /* Shadow */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  
  /* Sidebar */
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 60px;
  --sidebar-bg: var(--primary-dark);
  --sidebar-text: var(--text-white);
  --sidebar-hover: rgba(255, 255, 255, 0.1);
}

html {
  font-size: 14px;
  position: relative;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  background-color: var(--bg-secondary);
}

/* Logo */
.tafread-logo {
    fill: var(--primary-light);
}

/* Focus and Active States */
.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem var(--primary-light);
}

/* Custom Button Styles */
.btn-primary {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline-primary {
  color: var(--primary-light);
  border-color: var(--primary-light);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
  color: var(--text-white);
}

/* Navigation */
.navbar-brand {
  color: var(--primary-dark) !important;
  font-weight: 600;
}

/* Cards */
.card {
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-primary);
}

.card-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
}

/* Alerts */
.alert {
  border: none;
  border-radius: 0.5rem;
}

/* Tables */
.table {
  background-color: var(--bg-primary);
}

.table-hover tbody tr:hover {
  background-color: rgba(13, 51, 25, 0.025);
}

/* Forms */
.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem var(--primary-muted);
}

.form-select:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.2rem var(--primary-muted);
}

/* Sidebar Styles */
.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1000;
  width: var(--sidebar-width);
  background-color: var(--sidebar-bg);
  transition: all 0.3s ease;
  overflow-y: auto;
}

.sidebar-collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar .nav-link {
  color: var(--sidebar-text);
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin: 0.125rem 0.5rem;
  transition: all 0.2s ease;
}

.sidebar .nav-link:hover {
  background-color: var(--sidebar-hover);
  color: var(--text-white);
}

.sidebar .nav-link.active {
  background-color: var(--primary-light);
  color: var(--text-white);
}

.sidebar .nav-link i {
  margin-right: 0.5rem;
  width: 1.25rem;
  text-align: center;
}

.sidebar-collapsed .nav-link span {
  display: none;
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width);
  transition: margin-left 0.3s ease;
  min-height: 100vh;
}

.main-content.sidebar-collapsed {
  margin-left: var(--sidebar-collapsed-width);
}

/* Header */
.main-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 999;
}

/* Dashboard Stats Cards */
.stats-card {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: var(--text-white);
  border: none;
  border-radius: 0.75rem;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.stats-card .card-body {
  position: relative;
}

.stats-card .stats-icon {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  opacity: 0.3;
}

/* Validation Enhancements */
.form-control.is-invalid:focus {
  border-color: var(--danger);
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.form-control.is-valid:focus {
  border-color: var(--success);
  box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

.invalid-feedback {
  display: block;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.valid-feedback {
  display: block;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  color: var(--success);
}

/* Form Group Styling */
.form-group {
  margin-bottom: 1rem;
}

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

.form-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Required Field Indicator */
.form-label.required::after {
  content: " *";
  color: var(--danger);
}

/* Form Loading State */
.form-loading {
  position: relative;
  overflow: hidden;
}

.form-loading::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 1.5s infinite;
  z-index: 1;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Custom File Upload Styling */
.form-control[type="file"] {
  padding: 0.375rem 0.75rem;
}

.form-control[type="file"]::-webkit-file-upload-button {
  background-color: var(--primary-light);
  color: var(--text-white);
  border: none;
  padding: 0.375rem 0.75rem;
  border-radius: 0.375rem;
  margin-right: 0.75rem;
  cursor: pointer;
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
  background-color: var(--primary-dark);
}

/* Custom Select Styling */
.form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
}

/* Checkbox and Radio Custom Styling */
.form-check-input:checked {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
}

.form-check-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.25rem var(--primary-muted);
}

/* Switch Toggle Custom Styling */
.form-switch .form-check-input:checked {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
}

.form-switch .form-check-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 0.25rem var(--primary-muted);
}

/* Input Group Enhancements */
.input-group-text {
  background-color: var(--bg-secondary);
  border-color: var(--border-primary);
  color: var(--text-secondary);
}

.input-group .form-control:focus {
  z-index: 3;
}

/* Responsive Design */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .sidebar .nav-link span {
    display: none;
  }
}

/* Utilities */
.text-primary-dark { color: var(--primary-dark) !important; }
.text-primary-light { color: var(--primary-light) !important; }
.bg-primary-dark { background-color: var(--primary-dark) !important; }
.bg-primary-light { background-color: var(--primary-light) !important; }
.border-primary-light { border-color: var(--primary-light) !important; }