/* 
 * EPIONE Professional Styling
 * Moderne, professionelle Optik für klinisches Data Capture System
 */

/* ==================== ROOT VARIABLES ==================== */
:root {
  /* Primärfarben - EPIONE Branding */
  --epione-purple: #667eea;
  --epione-purple-dark: #4c51bf;
  --epione-purple-light: #9f7aea;
  
  /* Sekundärfarben */
  --epione-blue: #4299e1;
  --epione-green: #48bb78;
  --epione-orange: #ed8936;
  --epione-red: #f56565;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-mono: 'Monaco', 'Courier New', monospace;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==================== NAVIGATION / HEADER ==================== */
.app-header {
  background: linear-gradient(135deg, var(--epione-purple) 0%, var(--epione-purple-dark) 100%);
  color: white;
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.app-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0;
}

.app-header h1 .subtitle {
  font-size: 0.875rem;
  font-weight: 400;
  opacity: 0.9;
  display: block;
  margin-top: var(--spacing-xs);
}

/* ==================== CARDS ==================== */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  transition: all 0.2s ease;
}

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

.card-header {
  border-bottom: 2px solid var(--gray-100);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-900);
  margin: 0;
}

.card-header .subtitle {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-top: var(--spacing-xs);
}

/* ==================== BUTTONS ==================== */
.btn {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

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

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

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

.btn-primary:hover {
  background: linear-gradient(135deg, var(--epione-purple-dark) 0%, #3730a3 100%);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

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

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

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

/* ==================== FORMS ==================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--epione-purple);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-input.error {
  border-color: var(--epione-red);
}

.form-error {
  color: var(--epione-red);
  font-size: 0.8125rem;
  margin-top: var(--spacing-xs);
}

/* ==================== TABLES ==================== */
.table-container {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

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

.table th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
  background: var(--gray-50);
}

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

/* ==================== BADGES & PILLS ==================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-warning {
  background: #fed7aa;
  color: #92400e;
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-info {
  background: #dbeafe;
  color: #1e40af;
}

.badge-gray {
  background: var(--gray-200);
  color: var(--gray-700);
}

/* ==================== TABS ==================== */
.tabs {
  display: flex;
  gap: var(--spacing-sm);
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: var(--spacing-xl);
}

.tab {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-600);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}

.tab:hover {
  color: var(--epione-purple);
}

.tab.active {
  color: var(--epione-purple);
  border-bottom-color: var(--epione-purple);
}

/* ==================== ALERTS ==================== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
}

.alert-success {
  background: #d1fae5;
  border-color: var(--epione-green);
  color: #065f46;
}

.alert-warning {
  background: #fed7aa;
  border-color: var(--epione-orange);
  color: #92400e;
}

.alert-danger {
  background: #fee2e2;
  border-color: var(--epione-red);
  color: #991b1b;
}

.alert-info {
  background: #dbeafe;
  border-color: var(--epione-blue);
  color: #1e40af;
}

/* ==================== MODAL ==================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: var(--spacing-lg);
}

.modal {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: var(--spacing-xl);
  border-bottom: 2px solid var(--gray-100);
}

.modal-header h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin: 0;
}

.modal-body {
  padding: var(--spacing-xl);
}

.modal-footer {
  padding: var(--spacing-xl);
  border-top: 2px solid var(--gray-100);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* ==================== STATISTICS CARDS ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.stat-card .icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.stat-card.purple .icon {
  background: linear-gradient(135deg, var(--epione-purple) 0%, var(--epione-purple-dark) 100%);
  color: white;
}

.stat-card.green .icon {
  background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  color: white;
}

.stat-card.blue .icon {
  background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
  color: white;
}

.stat-card.orange .icon {
  background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
  color: white;
}

.stat-card .label {
  font-size: 0.875rem;
  color: var(--gray-600);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-top: var(--spacing-xs);
}

.stat-card .change {
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
}

.stat-card .change.positive {
  color: var(--epione-green);
}

.stat-card .change.negative {
  color: var(--epione-red);
}

/* ==================== LOADING STATES ==================== */
.loading-spinner {
  border: 3px solid var(--gray-200);
  border-top-color: var(--epione-purple);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 0.8s linear infinite;
  margin: var(--spacing-xl) auto;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .app-header {
    padding: var(--spacing-md);
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .table-container {
    overflow-x: auto;
  }
  
  .modal {
    margin: var(--spacing-md);
  }
}

/* ==================== ANIMATIONS ==================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateX(-100%); }
  to { transform: translateX(0); }
}

.slide-in {
  animation: slideIn 0.3s ease;
}

/* ==================== UTILITIES ==================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-xl);
}