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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --background: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.5;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: var(--primary);
  color: white;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

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

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-large {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* Filters */
.filters {
  padding: 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.search-input {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.department-select {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
  background: white;
  min-width: 150px;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

/* Employee Count */
.employee-count {
  padding: 0.5rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Employee List */
.employee-list {
  display: grid;
  gap: 0.75rem;
}

.employee-card {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid var(--border);
}

.employee-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.employee-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.employee-name {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
}

.employee-dept {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 500;
}

.employee-card-body {
  display: grid;
  gap: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.employee-card-body span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Employee Detail */
.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.employee-detail {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.detail-section {
  margin-bottom: 1.5rem;
}

.detail-section:last-child {
  margin-bottom: 0;
}

.detail-section h3 {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

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

.detail-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.detail-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
}

.detail-value {
  font-size: 1rem;
  color: var(--text);
}

.detail-value:empty::before {
  content: '—';
  color: var(--text-muted);
}

/* Summary */
.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.summary-header h2 {
  font-size: 1.5rem;
}

.summary-content {
  display: grid;
  gap: 1.5rem;
}

.summary-card {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.summary-card h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.summary-total {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  padding: 1rem 0;
}

.summary-list {
  list-style: none;
}

.summary-list li {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.summary-list li:last-child {
  border-bottom: none;
}

.summary-list .count {
  background: var(--background);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-weight: 600;
  font-size: 0.875rem;
}

/* Form */
.form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.form-header h2 {
  font-size: 1.5rem;
}

.employee-form {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

legend {
  font-weight: 600;
  padding: 0 0.5rem;
  color: var(--primary);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* FAB */
.fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  transition: all 0.2s;
  z-index: 50;
}

.fab:hover {
  transform: scale(1.1);
  background: var(--primary-dark);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--card);
  border-radius: 0.75rem;
  padding: 1.5rem;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.modal-content h2 {
  margin-bottom: 1rem;
}

.error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: 0.5rem;
}

/* Responsive */
@media (max-width: 640px) {
  .header {
    padding: 0.75rem;
  }
  
  .header h1 {
    font-size: 1rem;
  }
  
  .header-actions {
    width: 100%;
    justify-content: flex-end;
  }
  
  .btn {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
  }
  
  .filters {
    flex-direction: column;
  }
  
  .search-input,
  .department-select {
    width: 100%;
  }
  
  .main-content {
    padding: 0.75rem;
  }
  
  .employee-form {
    padding: 1rem;
  }
  
  fieldset {
    padding: 0.75rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Print styles */
@media print {
  .header,
  .filters,
  .fab,
  .btn {
    display: none !important;
  }
  
  .main-content {
    padding: 0;
    max-width: none;
  }
  
  .employee-card,
  .employee-detail,
  .summary-card {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}